Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
1017 results about "Rotary inertia" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Rotary Inertia or rotational inertia is a further analogy of inertia in which a rotating body maintains its state of uniform rotational motion. Thus its angular momentum would be unchanged, unless an external torque were to be applied. Rotary inertia often has hidden practical consequences. In the braking of a railway train, arresting the linear motion would require that the substantial rotational inertia of the motors must be converted to some other forms of energy, thus causing acoustic vibration of the wheels and frictional heating of the brakes on the railway carriage. Rotary Inertia is also found in the Timoshenko beam theory, a theory for a model that considers rotary inertia and shear stress to describe the vibrations of thick bars, which are part of the mallet subfamily of the percussion family of musical instruments.
Directional tactile feedback for haptic feedback interface devices
InactiveUS6864877B2Reduced Power RequirementsLow costInput/output for user-computer interactionCathode-ray tube indicatorsInertial massControl signal
Owner:IMMERSION CORPORATION
Putter type golf club
A putter golf club that resists twisting by increasing the rotational inertia of the golf club to the maximum degree possible by distributing mass away from the center of mass of the putter, and thereby expands the sweet spot of the putter. Rotational inertia is maximized via use of a heel control wing and a toe control wing extending rearwardly and outwardly from a striking face of the putter as well as a tail rod extending perpendicularly from striking face. Further increase of rotational inertia is accomplished via s symmetrical recesses incorporated into heel and toe control wing.
Owner:DEPAUL RICHARD
Autocollimation method of carrier aircraft rotating type strapdown inertial navigation system under shaking base
InactiveCN103245360AOvercome the disadvantage of not being able to useHigh precisionNavigation by speed/acceleration measurementsAccelerometerReference vector
The invention discloses an autocollimation method of a carrier aircraft rotating type strapdown inertial navigation system under a shaking base, and belongs to the field of navigation. The autocollimation method comprises the following steps of: firstly obtaining the longitude and latitude of the position of a carrier, secondly collecting output signals of a fiber-optic gyro and a quartz flexible accelerometer in an inertia measurement unit, and then carrying out automatic compensation on a constant error of an inertia device by adopting a double-shaft rotating table rotatory IMU (inertial measurement unit) to form a rotating type strapdown inertial navigation system; and then calculating a rough initial posture array by utilizing gravity acceleration in an inertial coordinate system as a reference vector, establishing a state equation and a measuring equation again of the system, designing a vanishing adaptation Kalman filter to accurately estimate a misalignment angle of the carrier, and correcting a strapdown posture matrix by utilizing the misalignment angle to finish initial alignment and enter a navigation state. The method isolates the influence of shake of a vessel to initial alignment of a carrier aircraft, and dynamic random disturbance in measured noise is restrained through estimating the initial posture array of the system via the vanishing adaptation Kalman filter method, so that rapid autocollimation of the carrier aircraft rotating type strapdown inertial navigation system is realized.
Owner:BEIJING UNIV OF TECH
Automatic regulating apparatus for controller parameters of servo driver of motor and method thereof
ActiveCN101895252AGood control effectAvoid misalignmentMotor parameters estimation/adaptationPermanent magnet synchronous motorDisplay device
The invention discloses an automatic regulating apparatus for controller parameters of a servo driver of a motor and a method thereof. The apparatus comprises an inertia identifier, a parameter initial regulator, a parameter checker, a parameter optimizer, a parameter saving and displaying device, a speed controller, a position controller, a torque controller, a PWM (Pulse-Width Modulation) generator and a coded disc. In the invention, the servo driver of an alternating current permanent magnet motor automatically configures the parameters of the position controller and the speed controller according to different rotary inertias of mechanic load, checks and further optimizes the automatically configured parameters through the parameter checker and the parameter optimizer so that the position response and the speed response of the servo driver are relatively optimal. The servo driver of the alternating current permanent magnet synchronous motor automatically regulates the control parameters according to work occasions and achieves ideal control effect. The whole process is manual participation free and completed fully by the servo motor of the alternating current permanent magnet synchronous motor.
Owner:上海新时达线缆科技有限公司 +2
Rotational atherectomy device with electric motor
An atherectomy device is disclosed, which is rotationally driven by an electric motor. In some designs, the device includes features unavailable on gas turbine-driven systems, such as the storing in memory of low / medium / high preset rotation speeds for particular models of handle, calculations of the amount of saline left in the IV and associated warnings when it gets sufficiently low, and automatic adjustment of the IV pump rate to a predetermined or calculated level when the rotational speed of the motor is changed. The electric motor has far more rotational inertia than a comparable gas turbine, so the system includes a control mechanism that helps prevent damage from excessive torque being applied to the distal end of the drive shaft. When an obstruction at the distal end is detected, by a drop in the motor rotational speed, the motor is released and is allowed to spin freely as a flywheel. The freely-spinning motor allows the large angular momentum of the system to dissipate rapidly and safely, without excessive torque to the drive shaft.
Owner:CARDIOVASCULAR SYST INC
Method and apparatus for pre-spinning rotor forgings
ActiveUS20100212422A1Relieve forging induced residual stressAvoid excessive rotationForce measurementStatic/dynamic balance measurementHigh densityRotation velocity
A method and system for relieving forging induced residual stresses in a rotor forging balances a pre-spin machine with the forging mounted thereon at a first rotational speed and then pre-spins the forging with it mounted on the machine at a substantially greater second rotational speed. A one per rev sensor is used for determining a weight placement angle and a vibration sensor is used for determining an amount of weight to add to a spinning assembly including the forging during the balancing. High-density non-metallic balance weights adhesively attached on an inside surface of the forging or spinning assembly may be used. The rotational inertia of the spinning assembly may be checked during a spin up period by determining a rate of rotational acceleration vs. torque applied to the spinning assembly and used to stop the pre-spinning if it is to great.
Owner:GENERAL ELECTRIC CO
Rollover warning method and rollover warning device for heavy vehicle
InactiveCN104401323AImprove anti-interference abilityLow costDriver input parametersRolloverActive safety
The invention belongs to the technical field of vehicle active safety, and particularly provides a rollover warning method and a rollover warning device for a heavy vehicle. The rollover warning method and the rollover warning device are low in cost, are free of influence on heavy vehicle load and mass center height, and can warn impending rollover accidents of the heavy vehicle in the next period of time in advance. The method solves the problem that an existing heavy vehicle rollover warning method can warn a vehicle rollover risk in a static threshold value mode but cannot warn an impending rollover accident to a driver in advance. The rollover warning method adopts a classical Kalman filtering technology to simplify a rollover warning model in a combination mode, the motion state of the heavy vehicle is accurately estimated, and then a TTR algorithm is utilized for predicting the rollover risks in the next period of time. The warning algorithm has better universality, and meanwhile prevents inaccurate or invalid warning caused by the changes such as the load, center-of-gravity position and rotary inertia of the heavy vehicle.
Owner:HEBEI UNIV OF ENG
Control system for participation of wind power plant in primary frequency modulation and implementation method
ActiveCN106532746APracticalSingle network parallel feeding arrangementsPower oscillations reduction/preventionNew energyEngineering
The invention relates to a control system for participation of a wind power plant in primary frequency modulation and an implementation method. The controls system is composed of modules such as a wind power unit data acquisition unit, a wind power unit inertia calculation unit, a wind power unit inertia control unit, a wind power unit primary frequency modulation processing unit, a telecontrol communication control unit, a wave recording and analyzing unit and a frequency disturbance unit. According to the invention, participation in primary frequency modulation of a power grid is performed in a mode of wind power plant station-level active power coordination control in allusion to actual characteristics of the new energy resource of wind power, not only frequency droop control is considered, the rotary inertia of a wind power unit is utilized at the same time, output of the wind power unit is increased when the system frequency fluctuates and exceeds the threshold, participation in primary frequency modulation is performed quickly within a certain time under the condition of not increasing additional energy storage equipment, the action of a fan is played to the maximum degree, and purposes of reducing the amplitude of variation in system frequency and participating in quick recovery of the power grid frequency are achieved. The control system provided by the invention is applicable to application occasions in which the wind power plant participates in primary frequency modulation of a system.
Owner:BEIJING SIFANG JIBAO AUTOMATION
High-precision laser gyroscope single-shaft rotating inertial navigation system
InactiveCN101701825AHigh precisionImprove work performanceNavigational calculation instrumentsNavigation by speed/acceleration measurementsAstronomyRotary inertia
The invention relate to a high-precision laser gyroscope single-shaft rotating inertial navigation system which comprises an inertial measuring unit, a single-shaft rotating platform, a circuit box, a UPS power supply, a display control device, and the like, wherein the inertial measuring unit 1 is installed on the single-shaft rotating platform 2 and carries out shock absorption by a shock absorber 3. The periodic rotation of the single-shaft rotating platform is used for modulating literal drift of an inertial device in the inertial measuring unit and improving the posture, speed and position precision of the inertial navigation system. The system concretely comprises precise installation and calibration of the inertial measuring unit, the selection of a single-shaft rotating way, precise multiposition initial alignment, the error analysis, modeling and temperature compensation of the inertial navigation system and the inertial device and a navigation algorithm of a single-shaft rotating strapdown inertial navigation system. The invention can provide a real-time, complete and high-precision navigation posture and speed and position information for a carrier (warship) for a long time and improve the comprehensive combat capability of the carrier.
Owner:龙兴武 +4
Overrunning virtual synchronous generator (VSG+) method with rotary inertia and damping self-optimization-trending
ActiveCN105186554ARealize "zero" impactImprove receptivitySingle network parallel feeding arrangementsPhotovoltaic energy generationVirtual synchronous generatorClosed loop
The invention discloses an overrunning virtual synchronous generator (VSG+) method with rotary inertia and damping self-optimization-trending. The method comprises the following steps: step one, a mechanical equation and an electromagnetic equation of a virtual synchronous generator (VSG) are established; step two, the rotary inertia J and damping D in a VSG model are increased as |delta f| is increased, wherein delta f is an absolute value of a difference between a power network rated frequency and the actual frequency of the VSG; and step three, according to self-adjustment of the rotary inertia J and the damping D, closed-loop control is performed on the |delta f|, and finally, grid connection of a distributed photovoltaic power generation system is realized. According to the VSG+ method with the rotary inertia and damping self-optimization-trending, provided by the invention, the rotary inertia J and the damping D in the VSG are adaptively adjusted as the |delta f| changes, the rotary inertia J and the damping D after adjustment then perform feedback regulation on the |delta f|, and finally, zero impact during grid connection of photovoltaic inverters is realized, such that the acceptance capability of a power network for the distributed photovoltaic power generation system is improved.
Owner:XUJI GRP +2
Wind power generator, windmill, and spindle and blade of the windmill
A wind power generator has a windmill for rotating the generator. The windmill includes a main vertical shaft, a rotor, and a wind-receiving blade. The rotor, fixed horizontally at the upper end of the main vertical shaft, comprises a flywheel, and a plurality of wind-receiving blades is spaced equally on the circumference of the rotor. The rotor gives kinetic energy by rotation inertia to the windmill. The wind-receiving blade is excellent in bending properties, and even when it receives breeze, the main vertical shaft is rotated with the principle of leverage.
Owner:NTN CORP
Oval ultrasonic machining device with non-contact induction power supply function
ActiveCN107008959ASmall turning radiusImprove rotational stabilityMachine tool componentsMilling cuttersNumerical controlUltrasonic machining
Owner:BEIHANG UNIV
Spacecraft quality characteristic comprehensive test board based on spherical air bearing
InactiveCN103389183AImprove centroid measurement accuracyHigh measurement accuracyStatic/dynamic balance measurementAir bearingRotary inertia
The invention discloses a spacecraft quality characteristic comprehensive test board based on a spherical air bearing. The test board comprises devices such as the spherical air bearing, a torsional pendulum driving device, a torsion bar spring, a torque balancing device, a clamp position locking device, a cylindrical air bearing and the like. The centroid position of a spacecraft is measured with a torque balancing method, and the rotary inertia of the spacecraft is measured with an air floatation torsional pendulum method. The device can measure the transverse centroid and the vertical axis rotary inertia simultaneously, and the measuring accuracy is improved by one time compared with a prior device.
Owner:BEIJING INST OF SPACECRAFT ENVIRONMENT ENG
Rotational inertia on-line identification method for alternating current (AC) permanent magnet synchronous motor servo system
ActiveCN103219939AAvoid spaceAvoid the disadvantage of large amount of calculationElectronic commutation motor controlVector control systemsMotor speedConstant load
The invention relates to a rotational inertia on-line identification method for an alternating current (AC) permanent magnet synchronous motor servo system and belongs to the technical field of rotational inertia identification for motors. The method aims to solve the problems that an on-line inertia identification method based on the traditional least square method is high in requirements for storage space and arithmetic speed of digital processing chips. The method adopts a load torque identification part to identify a constant load disturbance torque value TL; a system dynamic state judging part is adopted for judging whether rotation speed of a motor is at a dynamic change stage, and when the rotation speed of the motor is at the dynamic change stage and the rate of change of the rotation speed of the motor is higher than a critical change rate for identification of rotational inertia of the motor, a rotational inertia estimation value is obtained through calculation by utilization of a least square estimation method based on recursion; and when the rotational inertia on-line identification process meets requirements of a preset output rotational inertia estimation value and meets a requirement for precision, the rotational inertia estimation value is output and the rotational inertia on-line identification process is completed. The method is used for rotational inertia on-line identification for the motor servo system.
Owner:HARBIN INST OF TECH
Rotary inertia identification method for permanent magnet synchronous motor AC servo system
ActiveCN101699763AReduce precisionImprove recognition accuracyMotor parameters estimation/adaptationElectric machinePermanent magnet synchronous motor
The invention discloses a rotary inertia identification method for a permanent magnet synchronous motor AC servo system, which adopts a speed command generator, a motor and a load, and comprises the following steps that: the permanent magnet synchronous motor AC servo system generates enable which has the rotary inertia identification function, and a user sets the rotary inertia identification duration; the speed command generator generates a uniform acceleration command of a first acceleration in the forward direction to make the motor accelerated to a first rotating speed; the speed command generator generates a uniform acceleration command of a second acceleration in the forward direction to make the motor accelerated to a second rotating speed; the speed command generator generates a uniform acceleration command of a third acceleration in the forward direction to make the motor reduced to the first rotating speed; and the speed command generator generates a uniform acceleration command of a fourth acceleration in the forward direction to make the motor reduced to a zero rotating speed, and a forward-direction rotary inertia identification cycle is completed. The method ensures high identification precision in the rotary inertia identification process.
Owner:SHANGHAI STEP ELECTRIC +1
Rotor of built-in permanent magnet motor and magnetic steel structural parameter determining method thereof
InactiveCN102157998AHigh mechanical strengthIncrease stiffnessMagnetic circuit rotating partsElectric machinePermanent magnet motor
The invention relates to a rotor of a high-quality and high-speed built-in permanent magnet motor and a magnetic steel structural parameter determining method thereof. In the invention, the whole section magnetic steel of each electrode of the rotor of a conventional built-in permanent magnet motor is divided into multiple sections of magnetic steel which have the same polarity and different widths; the multiple sections of the magnetic steel are respectively arranged in a rotor core; and reinforcing ribs with the function of magnetic isolation are arranged among the multiple sections of the magnetic steel. By reasonably modulating and determining the width and distribution of each section of the magnetic steel, the air gap magnetic density waveform approaches sine distribution; harmonic components are reduced to the greatest extent; the eddy current loss of the magnetic steel and the torque pulsation of the motor are simultaneously reduced; and the electromagnetic performance of the motor is enhanced. Furthermore, the multiple sections of the magnetic steel are arranged in the circumference along the rotor; the highest rotating speed of the safe operation of the rotor is greatly enhanced on machinery; the radial thickness which is needed by the magnetic circuit of the rotor is obviously reduced on the structure; the rotational inertia and weight of the rotor are reduced; the dynamic response of the motor is improved; and the requirements of a high-speed driving system on the performance of the motor are met.
Owner:SHANGHAI UNIV
Method for identification of rotational inertia of AC servo
InactiveCN101231207AImprove torque performanceGood dynamic responseStatic/dynamic balance measurementElectric controllersServo actuatorLoad torque
The invention relates to a rotary inertia identification method of an alternating-current servomechanism, the load inertia and the rotor inertia of a motor are regarded as a whole inertia, a servo system does an accelerated motion and a decelerated motion, so as to obtain the system output torque and the motor average rotate speed for a period of time. The average torque of the servo system can be obtained by the system output torque, the value of the whole inertia can be obtained according to the motor average rotate speed, the average torque of the servo system, and the total operation time of the accelerated motion and the decelerated motion of the system, that is, the rotary inertia of the alternating-current servomechanism can be identified. The invention does not need to singly identify the load inertia or the load torque for identifying the system rotary inertia, but causes the load inertia and the motor rotary inertia to be regarded as an inertia, and the identification of the system rotary inertia can be realized by combining the system output torque. The implementation of the method is simple, the use is convenient, the identified inertia precision is higher, and the method can be applied to the servo system inertia detection of a permanent magnetism synchronous servo-actuator.
Owner:ESTUN AUTOMATION TECH
Permanent magnet synchronous motor control system with load state observer
The invention reveals a permanent magnet synchronous motor control system with a load state observer. The control system is based on the vector control, is combined with speed-and-current double closed-loop control, and is added with the load state observer wherein the load state observer includes a load torque observer and a moment-of-inertia identification module. The observed value of the load torque is used for the feedforward compensation of current control so as to raise the response speed and robustness of the controller. The moment-of-inertia identification result is used to adjust the ratio of the system's speed ring and the integral gain, so as to obtain the optimized speed loop response performance, and realize the self-tuning of the controller parameters.
Owner:HARBIN UNIV OF SCI & TECH
Axial variable displacement plunger pump of swash plate
InactiveCN101487458APositive-displacement liquid enginesMulti-cylinder pumpsEngineeringHigh pressure
The invention provides a power element used in a hydraulic transmission system. A swash plate variable axial plunger pump consists of a swash plate, a plunger cylinder body and a port plate. The angle-variable swash plate rotates with a drive rotating shaft which is connected by a hinge, and the swash plate drives the plunger to only have reciprocating motion in a fixed cylinder barrel, thus avoiding the disadvantages of large rotating inertia, large friction surface of port surface and easy leakage of a common swash plate axial plunger pump. The swash plate can be divided into a manual swash plate, a hydraulic-control swash plate and a hydraulic-control and spring combined variable swash plate. The swash plate can be conveniently adjusted by a window above a variable shell. The plunger pump has various uses and advantages of small rotating inertia, little friction surface, and high mechanical efficiency and volumetric efficiency, and being insensitive to pollution, generating little heat, being capable of taking as an economical combination pump with 'low pressure and large flow or high pressure and small flow' and the like. Besides as a common pump, the axial plunger pump can also be used in the superhigh pressure and synchronous cylinder field. The axial plunger pump has the advantages of general working accuracy and low production cost.
Owner:张全根
Fluid entrapment detection
InactiveUS20080178398A1Other washing machinesControl devices for washing apparatusEngineeringEntrapment
A washing machine includes a cabinet, a wash tub supported within the cabinet, a spin basket for holding a wash load, the spin basket rotatable in the wash tub by a motor, and a controller for driving the motor to rotate the spin basket. The controller is adapted to detect water entrapment within a wash load in a spin basket of a washing machine by measuring a first parameter indicative of the rotational inertia of the spin basket when accelerated to a first spin speed, controlling the spin basket to dewater a wash load in the spin basket, measuring a second parameter indicative of the rotational inertia of the spin basket at the first speed, comparing the first and second parameters, and detecting whether there is water entrapped in the wash load based on the comparison between the first and second parameters.
Owner:FISHER & PAYKEL APPLIANCES LTD
Device for measuring and adjusting weight, center of gravity and rotary inertia of ship model
InactiveCN101852641AImprove stabilityRealize measurementStatic/dynamic balance measurementVessel partsMarine engineeringComputer module
The invention aims at providing a device for measuring and adjusting weight, center of gravity and rotary inertia of a ship model, which comprises a frame, a knife edge, a knife groove, a substrate, a wheel, a sensor and a base. The invention has high measuring and adjusting accuracy, reduces the error caused by angular surveying through an angle amplifying module and further improves the measuring and adjusting accuracy of the device. The invention has good stability, and the center of gravity of the system formed by the inner rotary part and the ship mode is located below the rotary knife edge, thereby increasing the restoring torque and improving the stability of the rotary system. The inner rotary part and the outer support part are designed in a form that ensures that the measurement and adjustment of weight, center of gravity and rotary inertia of the ship model including rolling rotary inertia can be realized conveniently. The invention integrates measurement and adjustment, i.e. the device measures weight, the center of gravity and rotary inertia of the ship model into a whole.
Owner:HARBIN ENG UNIV
On-line identification and control method for parameter of alternating current position servo system model
The invention discloses an on-line identification and control method for a parameter of an alternating current position servo system model. According to the invention, a model reference adaptive identification algorithm based on a Lyapunov stability theory is utilized; and on-line identification is carried out on a rotary inertia J and a viscous damping coefficient B of a controlled object of an alternating current servo system; after convergence is carried out on an identification parameter, an on-line design on a position controller is carried out according to J and B values and the design is automatically switched to position control. According to the invention, an efficiency on an alternating current servo system design can be substantially improved.
Owner:常州固高智能装备技术研究院有限公司
Method and device for retracting an actuator
InactiveUS6859340B2Accurate currentIncreasing and decreasing velocityDisposition/mounting of recording headsDriving/moving recording headsLanding zoneEngineering
An actuator retract system and method for moving read / write heads from data regions on discs to non-data locations in a disc drive is disclosed. The non-data locations may be on or in close proximity to the discs. The non-data locations may be a landing zone or a load / unload ramp. At disc drive power-down, power generated from the rotational inertia in rotating discs is used to supply a current to a coil of a voice coil motor operably coupled to the actuator. During such power-down operation, a desired velocity is maintained using acceleration or deceleration, when necessary. The current generates an electric field around the coil that interacts with a magnetic field in the voice coil motor to move the actuator such that the read / write heads are retracted to the non-data location.
Owner:SEAGATE TECH LLC
Servo system inertia identification method adopting genetic algorithm for optimization
ActiveCN105915121ARealize online adjustmentEasy to identifyElectronic commutation motor controlElectric motor controlRotary inertiaSelf adaptive
The invention discloses a servo system inertia identification method adopting a genetic algorithm for optimization. Based on a model reference self-adaption theory, the self-adaption rule of inertia identification is designed according to a Landau discrete time recursive algorithm. The global searching capability of the genetic algorithm is utilized, a model reference self-adaption system is used as a control object, an output difference between a motor practical angular speed and an estimated angular speed is used as a control error, the integration of the product of time and an error absolute value is used as an optimization target, the self-adaption gain [beta] in the inertia identification is dynamically adjusted, and the online optimization of control parameters is realized. According to the invention, both the higher convergence speed and the higher identification precision are realized in inertia identification, and the relatively high self-adaption capability to the change of rotary inertia is achieved.
Owner:无锡超通智能制造技术研究院有限公司
Hybrid system control method
ActiveCN101903230APrevent sudden fluctuationsPrevent torque dropElectric machinesPropulsion using engine-driven generatorsHybrid systemTime lag
It is possible to reduce the torque drop caused by a transmission shock and a time lag in a hybrid system. When the transmission speed ratio is up-shifted in a hybrid system control method, a motor torque is instantaneously increased upon start of a half clutch control of a clutch and the motor torque is controlled to be zero or minus to compensate a vehicle drive torque increase by the engine rotation inertia during the half clutch control. When the clutch is completely connected, the motor torque is increased.After the increase of the torque, the motor torque is decreased with a predetermined time constant. When down-shift is performed, the motor torque is increased upon start of the half clutch control and the motor torque is decreased with a predetermined time constant from the increased torque so as to compensate the lowering of the vehicle drive torque by the engine rotation inertia, thereby smoothly making a connection to a torque-up amount upon a complete clutch connection.
Owner:BOSCH CORP
Driving device or image forming apparatus
InactiveUS20080261768A1Solve problemsToothed gearingsElectrographic process apparatusRotation velocityImage formation
A rotary-body driving-force transmitting mechanism transmits a driving force from a driving-force source to a rotary body. A rotary-inertial-body driving-force transmitting mechanism transmits the driving force to a rotary inertial body that suppresses a velocity fluctuation in the rotary body. A rotational velocity shift mechanism shifts the rotational velocity. The rotary inertial body, the rotary-body driving-force transmitting mechanism, and the rotary-inertial-body driving-force transmitting mechanism are provided coaxially with a rotary shaft of the rotary body. A satellite frictional gear mechanism is used as the rotational velocity shift mechanism.
Owner:RICOH KK
Hybrid-powered rotation driving system and construction machinery
ActiveCN103215982AAchieve recyclingHigh recovery rateSoil-shifting machines/dredgersLoad-engaging elementsElectricityMechanical energy
The invention discloses a hybrid-powered rotation driving system and construction machinery. The hybrid-powered rotation driving system comprises a master control valve and a rotary motor, wherein the master control valve is communicated with the rotary motor, and the rotary motor is used for being mechanically connected with a rotary platform. The hybrid-powered rotation driving system further comprises a first electric energy conversion unit, a second electric energy conversion unit, a hydraulic energy conversion unit and an energy accumulator, wherein the first electric energy conversion unit is used for converting mechanical energy of the rotary platform into electric energy and outputting the electric energy and is mechanically connected with the rotary platform, the second electric energy conversion unit is used for converting the electric energy output by the first electric energy conversion unit into mechanical energy and outputting the mechanical energy and is electrically connected with the first electric energy conversion unit, the hydraulic energy conversion unit is used for converting the mechanical energy output by the second electric energy conversion unit into hydraulic energy and outputting the hydraulic energy and is mechanically connected with the second electric energy conversion unit, and the energy accumulator is selectively communicated with the hydraulic energy conversion unit. According to the hybrid-powered rotation driving system, rotary inertia potential energy produced during the braking of the rotary platform is converted into electric energy, is then converted into hydraulic energy and is stored by using the energy accumulator, the energy recovery ratio is high, the structure is simple, and the reliability is high.
Owner:SUOTE TRANSMISSION EQUIP
Control method, experiment method and simulation method for improving new energy grid-connected stability
ActiveCN105958543AAchieve stable power transferImprove stabilityElectrical testingSingle network parallel feeding arrangementsFrequency changerElectric power transmission
The invention belongs to the technical field of new energy grid-connected power generation, and particularly relates to a control method, experiment method and simulation method for improving the new energy grid-connected stability. A generator is driven by new energy through a motor, the voltage phase relationship between the motor and the generator and the relationship between active power and motor parameters are analyzed, power angles are calculated and active power transmission is controlled through a source network phase difference method. The new energy and a power grid are simulated through a frequency converter and a four-quadrant programmable power supply, the phase of output voltage of the frequency converter is adjusted after grid-connected stable operation, the active power transmission quantity is measured until a rated value and a transmission power change of the motor is observed. A new energy side is simulated by an adjustable phase inverter power supply; a power grid side is an infinite power supply; and automatic excitation is adopted, an active transmission instruction of the inverter power supply is changed when the system stably runs, and the changes of active transmission, a rotating speed and a source network phase difference are observed. By the methods, the rotary inertia of the high-permeability new energy power grid can be effectively improved and the stability of the power grid is strengthened.
Owner:北京华电锐拓科技有限公司
Inertial electricity generating device for portable electronic equipment
InactiveCN1921275AReduce volumeSimple structureBatteries circuit arrangementsFrom muscle energyEngineeringRelative motion
The invention relates to an inertia generator of portable electric device, formed by movable inertia block and winding. Wherein, it via body motion obtains relative motion between inertia block and winding to change the magnetic flux of winding, to generate induced electromotive force. The invention uses inertia ball, annular groove and winding to form the generator based on free motion of inertia ball; the electromagnetic couple generator formed by rotor, stator and axle based on rotation inertia block; and speed-increase generator formed by inertia rotor, gear speed increaser and direct-current generator based on rotation inertia block. The invention has small volume and simple structure, to be integrated with electric device or separated from electric device. The invention can prolong the service time of electric device, via one charge.
Owner:NAT UNIV OF DEFENSE TECH
Detection structure for a Z-axis resonant accelerometer
ActiveUS9377482B2Improved mechanical and electrical characteristicAcceleration measurementInertial massAccelerometer
A detection structure for a z-axis resonant accelerometer is provided with an inertial mass anchored to a substrate by means of elastic anchorage elements so as to be suspended above the substrate and perform an inertial movement of rotation about a first axis of rotation belonging to a plane of main extension of the inertial mass, in response to an external acceleration acting along a vertical axis transverse with respect to the plane; and a first resonator element and a second resonator element, which are mechanically coupled to the inertial mass by respective elastic supporting elements, which enable a movement of rotation about a second axis of rotation and a third axis of rotation, in a resonance condition. In particular, the second axis of rotation and the third axis of rotation are parallel to one another, and are moreover parallel to the first axis of rotation of the inertial mass.
Owner:STMICROELECTRONICS SRL
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com