413results about How to "Large starting torque" patented technology

A projected shape of permanent magnets is contained within a plane of projection formed by adjacent claw-shaped magnetic poles overlapping when the claw-shaped magnetic poles are viewed in a direction of rotation of a rotor, and is generally similar in shape to a shape of the plane of projection.

The invention discloses a hybrid excitation type variable frequency AC starting generating system and a control method thereof. The hybrid excitation type variable frequency AC starting generating system comprises a hybrid excitation type variable frequency AC starting generator, a first current sensor for detecting excitation current, a second, current sensor, a third current sensor, three voltage sensors, a position sensor, a changeover switch, a starting switch and a starting generating controller, wherein the second current sensor and the third current sensor are used for detecting armature current. The control method comprises the steps of performing the vector control method based on inverter voltage compensating during starting, and adjusting the excitation current according to the motor armature current and the real-time rotating speed; performing the sectional PI control method based on the output voltage frequency change during generating the power, and adding a load current compensating ring; controlling the changeover switch to switch according to the motor rotating speed and the output voltage during switching from starting to power generation. The method has important application value in the field of aviation independent power starting generating systems.

The invention discloses a brushless direct current reluctance starter generator. The generator comprises a three-phase armature winding, an exciting winding, a winding series-parallel switching switch, a stator iron core, a rotor iron core, a shaft, a position sensor, a bridge converter and a controller, wherein armature coils, wound intensively, are wound on each pole of the stator iron core; excitation coils are wound by crossing three stator poles; and the armature coils in the same phase are in series or parallel connection to form a group. According to the starter generator, a reluctance structure is used; no winding is generated on the rotor; the generator is simple in structure and reliable to operate; excitation current can be adjusted to keep stability of output voltage during generating; when the generator is started, the generator rotates by means of a reluctance torque; the armature coils are connected in series; a large starting torque is achieved; the generator is applicable to operation at a low speed; the excitation winding is used for generating a magnetic field during generating; the armature coils are connected in parallel; small armature reaction is generated; and the generator is applicable to operation in a high speed. The brushless direct current reluctance starter generator is very applicable to transport tools comprising vehicles.

A permanent magnetism synchronous hub motor for electrically driven vehicle direct drive comprises shafts, a left end cover, rotors, stators, a right end cover, a rotating transformer, bearings are arranged on the shafts, inner rings of the left end cover and the right end cover are connected with the bearings in interference fit, stators are hot sleeved on the support of the shaft, the left end cover, the right end cover and the rotors are jointed together by bolts, the rotors are composed of rare earth magnet steels at interval adhering in the inner wall of the support by the magnet steel glue. The invention can be mounted in the vehicle wheel hub for directly driving the vehicle wheel and save traditional drive devices, thereby simplifying the whole vehicle structure, improving the drive efficiency and using the space effectively; the invention is an outer rotor motor without reduction gear mechanism, has small volume, large power, large starting moment, good control performance and low energy consumption, can reduce the whole vehicle weight and the maintenance cost and improve continued mileage and battery life.

The invention discloses a fault diagnosing and repairing method for a washing machine. The fault diagnosing and repairing method includes the steps of monitoring a washing progress, a loading state and a motor operation state of the washing machine in real time; if fault information is detected, judging a fault type according to the motor operation state; repairing the washing machine according to the fault type and the washing progress and the loading state of the washing machine when the washing machine breaks down; judging whether the fault is a hardware fault according to a repair result; if yes, performing fault alarming; if not, continuously operating the washing progress when the washing machine breaks down after repairing. The fault diagnosing and repairing method for the washing machine has the advantages that judgment fault probability can be lowered, and a repair rate of the washing machine can be lowered.

The invention relates to the technical field of undervoltage releases, in particular to an electromagnetic undervoltage release which is provided with a forced start-up circuit; the forced start-up circuit comprises a filter circuit connected with a power grid, a voltage-reduction capacitor, a bridge rectification circuit, a start-up capacitor, an energy-storage voltage detection circuit for detecting the voltage of the start-up capacitor, a power grid voltage detection circuit for detecting the voltage of the power grid, a control circuit and a system power circuit for supplying power to the control circuit; the output end of the filter circuit is serially connected with the voltage-reduction circuit and then connected with the bridge rectification circuit, the output end of the bridge rectification circuit is connected with the anode of the start-up capacitor and an electromagnetic coil, the cathode of the start-up capacitor is grounded, the other end of the electromagnetic coil is serially connected with a switch circuit controlled by the control circuit, and the other end of the switch circuit is grounded; and the output ends of the energy-storage voltage detection circuit and the power grid voltage detection circuit are connected with the input end of the control circuit. The invention solves the technical problems that the coil has large heating quantity, the starting torque of the undervoltage release is small, the circuits are excessively complex, and the like in the prior electromagnetic undervoltage release.

The invention relates to a starter / electric generator control method, in particular to a square wave combining excitation starter / electric generator control method, and belongs to the field of automobile engine starting / electric generating. A square wave combining excitation motor system comprises a square wave combining excitation motor (1), an excitation regulating unit (2), an inverter (3), an energy storing device (4) and a single-chip microcomputer control unit (5). When an engine sends a starting request, the square wave combining excitation motor (1) enters the starting mode, a speed controlling or torque controlling method is adopted in the starting mode, and the engine is started quickly. When a vehicle is driven normally, the square wave combining excitation motor (1) enters an electricity generating mode, the inverter (3) serves as an uncontrollable rectifier bridge, a voltage outer ring and exciting current inner ring control method is adopted, the air gas field is adjusted by regulating an exciting current, and the output voltage is stabilized.

The invention discloses a motor and AMT (automated mechanical transmission) integration-based electric vehicle driving system and a motor and AMT integration-based electric vehicle driving method. The driving system comprises a driving motor, a motor controller, a transmission drive assembly, a gear selection and shifting execution mechanism and a controller for the gear selection and shifting execution mechanism, wherein the transmission drive assembly comprises driving and driven gears of four gears, two splined hubs, two jointing sleeves and an output sensor; the driving motor is a direct current brushless motor; an output shaft of the driving motor is provided with an internal spline; a shell of the driving motor is integrally and directly connected with a transmission case through fine thread screws after being positioned through fixing pins; the output shaft, with the internal spline, of the motor is positioned in the motor; an input shaft of a transmission is directly inserted into the motor to be connected with the output shaft, with the internal spline, of the motor. According to the system, a clutch is eliminated, so that power interruption time during gear shifting is reduced, and the cost is also lowered; the jointing sleeves and the gears of a target gear can be synchronized during gear shifting by actively regulating the speed of the driving motor, and a synchronizer with high requirements on materials is eliminated from the transmission, so that the cost is further lowered.

The invention discloses a novel rotor initial position detecting technique which is used when a three-phase electro-magnetic doubly salient motor is started in six states. Because the research of a sensorless technique of the electro-magnetic doubly salient motor is very little at home and abroad, the invention provides a rotor position prediction method based on two-two conducted and injected low-pressure pulse vectors by aiming at the unique characteristic of the three-phase electro-magnetic doubly salient motor that an armature inductance value is a function of the rotor position. According to the method, only the terminal voltage of a non-conducted phase is detected, and the rotor initial position can be precisely predicted by comparing response amplitudes of the terminal voltage of the non-conducted phase on a conduction stage and a flow-continued stage. According to the method, any additional component is not needed, and an armature current sampling transformer is omitted; the method has the advantages of economy and practicability; and additionally, the positioning accuracy can reach 60 DEG, and the three-phase electro-magnetic doubly salient motor is guaranteed to be started in the six states, so as to increase the starting torque of the motor.

The invention relates to a mechanical type continuously variable transmission device. In the tooth meshing transmission non-stage transmission, two increasing-decreasing gears with gear diameters which are variable as required are used as speed ratio changers, when the gear diameter of one increasing-decreasing gear increases, the gear diameter of the other increasing-decreasing gear decreases the same length correspondingly at the same time, and the two gears are driven by the meshing of a toothed chain. The non-stage transmission overcomes the defects of the friction type continuously variable transmission (CVT) such as small drive moment, chain and wheel slippage, small starting moment, high gear shift power consumption, and really realizes the stepless speed change of tooth meshing transmission. The tooth meshing transmission non-stage transmission has the advantages of big drive torsional moment, small volume, and simple structure, and can be applied to various large and small-sized machines in large and small-sized vehicles or fixed occasions.

The invention relates to an asynchronous starting rotor of a half-magnetic-sheet permanent-magnetic synchronous motor, and in particular relates to a rotor which is applied to the permanent-magnetic synchronous motor. In one pair of magnetic poles, only one permanent magnet is used as a magnetic pole, a salient pole of a rotor iron core is used as the other magnetic pole, the rotor is identical to a two-pole rotor, and in a quadrupole rotor and a sextupole rotor, the permanent magnet with identical polarity is used as a magnetic pole. A plurality of outer ring mouse cage grooves and inner ring mouse cage grooves are respectively arranged inn a magnetic pole trough below the salient pole of the rotor iron core and the permanent magnet, an outer ring mouse cage conducting bar and an inner ring mouse cage conducting bar are respectively installed inside the outer ring mouse cage trough and the inner ring mouse cage trough, and an asynchronous torque is generated by the outer ring mouse cage conducting bar and the inner ring mouse cage conducting bar when the permanent magnetic synchronous motor is started. The asynchronous starting motor of the half-magnetic-sheet permanent-magnetic synchronous motor is simple in structure, less in consumption of permanent magnets and suitable for producing the small-sized permanent magnetic synchronous motor. The asynchronous starting can reduce the cost of the motor control equipment, and the synchronous operation can improve the operation efficiency of the motor.

The invention relates to a power drive system of an electric automobile, in particular to a motor with a mixed-flow fan for circulating inner and outer air paths. The invention solves the problems that the traditional electronic automobile has low reliability, heat radiation at low speed and poor effect when a self-ventilation motor is used as well as large size, difficult heat radiation and low peak powder and overload capacity when a fully-closed motor is used. The power drive system comprises an enclosure, an end cover, an inner cooling air path and a rotor; a mixed flow forced cooling fan is arranged on a non-driving end shaft of the motor; an engine seat shell of the enclosure is provided with U-shaped channel steel closely covering on paired air holes to form an enclosure inner air duct; a fan cover is arranged outside the enclosure, covers U-shaped channel steel and then is welded between two flanges form an enclosure outer air duct together with the engine seat shell; and air holes are formed on the two flanges of the enclosure as well as at the position of the motor end cover, which corresponds to the enclosure outer air duct. The device can better protect the inside of the motor from being intruded by dust and rain water and can ensure heat dissipation, smaller volume and weight requirement.

The invention discloses a DC (direct current) motor driver which is designed by using a full-analog electronic circuit, a PWM (pulse width modulation) pulse width control chip and a high voltage driving chip. The motor is precisely controlled by using a DC bus protection circuit, a rotary speed feedback and current feedback dual closed-loop PI (Proportional Integral) adjusting circuit, a DC motor back discharging controllable circuit and a pulse width limit controlling circuit. The invention has the following obvious effects: the DC motor driver is reliable in operation, fast in speed regulation response, and strong in anti-interference performance; the motor is exactly controlled by using current feedback dual closed-loop PI adjusting circuit, DC motor back discharging and pulse width limit controlling; and the DC motor driver is perfect in protection function, suitable for a wind power variable paddle system, large in starting torque and is frequently adjusted.

The invention relates to a soft start method of an efficient self-starting permanent magnet synchronous motor, which is characterized in that the rotor of the efficient self-starting permanent magnet synchronous motor is provided with a squirrel cage winding used for asynchronous self-starting and a permanent magnet pole; the stator of the efficient self-starting permanent magnet synchronous motor is provided with a set of pole-changing simplex windings with bipolar numbers; the permanent magnet pole numbers of the rotor are equal to twice of pole numbers of less connecting windings of the pole-changing windings; the pole numbers of multipolar connecting windings are equal to the permanent magnet pole numbers of the rotor, so that the permanent magnet synchronous motor can realize asynchronous self-starting in an asynchronous motor state and operates at a synchronous speed in a state approximate to the synchronous speed state, the soft self-starting of the efficient self-starting permanent magnet synchronous motor is realized, the efficient self-starting permanent magnet synchronous motor has the characteristics of large starting torque, small starting current, small mechanical vibration and the like, and the starting performance of the efficient self-starting permanent magnet synchronous motor is improved.

The invention discloses a combined brushless direct-current starter generator system and belongs to the field of starter power generation technologies. A brushless direct-current starter generator comprises an electrically-excited doubly-salient motor and a permanent magnet motor, wherein the motors are coaxially connected. An armature winding of the electrically-excited doubly-salient motor is connected with a bridge rectifier circuit to serve as a generation output end of the starter generator system. An armature winding of the permanent magnet motor is connected with a bidirectional bridge power conversion circuit and an asymmetric half-bridge circuit. An exciting winding is connected with a midpoint of the asymmetric half-bridge circuit. During starting, the permanent magnet motor drives an engine to start; after starting, the permanent magnet motor serves as the electrically-excited doubly-salient motor exciter providing the exiting winding with exciting current. The invention further discloses a control method of the combined brushless direct-current starter generator system. Starting torque is stable; power generation control is simple; the problem that starting source voltage and generation output voltage are unbalanced is solved; starting and generating functional decoupling control is achieved; starting and power generation switching is simple and reliable to control.

The invention provides an electromagnetic under-voltage release comprising a filtering rectifying circuit, a sampling circuit, a power supply circuit, a control module, a driver module and an electromagnet. A direct-current resistance of a starting winding is less than a direct-current resistance of a working winding. According to the electromagnetic under-voltage release and the controlling method thereof, a microcomputer is used for controlling the control circuit, and the controlling thinking is clear and the circuit structure is simplified and ingenious. The starting winding-working winding dual-coil electromagnet is arranged at the circuit, and the direct-current resistance of the starting winding is less than the direct-current resistance of the working winding and the working current of the starting winding is high and the starting torque is large, so that the pull-in performance of the electromagnet can be ensured. And the working current of the working winding is low and thus the basic power for pull-in maintaining of the electromagnet is provided, so that the heating value is extremely low.

This invention discloses a sort of soft startup control set which can settle the voltage rebound and radiance of the air condition, it relates to the area of the air condition technique and settle the bug that the electricity is too big when air condition startup in existing technique. This set consists ofthe electron circuitry connected in the compressor of the air condition: the main winding after the silicon control connects with the normal open port of the relay with a reamer and two flings in parallel they connect with the compressor in series, the startup capacitance, the discharge resistance connected with the startup in parallel, the negative temperature coefficient ceramics heat-variable element connected with the startup capacitance, the normal close port of the relay with a reamer and two flings, and after it connects with the running capacitance in parallel they connect with the subsidiary winding of the compressor. Hereinbefore they connect between the zero line and the front line by the common port of the compressor after connected with them in parallel. The control pole of the silicon control connects with the main control chip and peripheral circuit which consists ofthe DC power circuit, the voltage check circuit, the zero cross detection circuit and the control relay with a reamer and two flings loop circuit. It can debase effectively the startup electricity of the air condition and augment the startup torsion when the compressor operates at low voltage in this invention.

The invention provides a gearshift control method for multi-gear motors. The method comprises the following steps: setting a plurality of speed gears, at least including a first speed gear and a second speed gear on an automatic gear switch, wherein the rotational speed value of a motor corresponding to the first speed gear is less than that of the motor corresponding to the second speed gear; placing the automatic gear switch in the first speed gear; confirming that a gear-selecting unit is in an automatic gear state; starting automatic gearshift function; and automatically regulating the rotational speed of the motor according to the load changes of the motor. The method also comprises the steps of confirming that the gear-selecting unit is in a low gear state, starting the function of running at uniform speed and placing or keeping the automatic gear switch in a preset speed gear. The gearshift control method for multi-gear motors has the advantages of adopting an electronic clutch mode, producing no arc during automatic gearshift, effectively solving the damage of arc to the automatic switch and automatically switching the gears of the motor according to the load changes.

The invention provides a rotor, which is used for a self-starting three-phase permanent magnet motor. The rotor is a mixed magnetic circuit solid rotor and comprises a rotating shaft and a pole shoe arranged around the rotating shaft, and the rotor also comprises a first permanent magnet and a second permanent magnet, wherein the first permanent magnet is arranged around the rotating shaft and is positioned between the rotating shaft and the pole shoe, and generates radial magnetic circuit; and the second permanent magnet is arranged around the rotating shaft and is positioned in the pole shoe, and generates a tangential magnetic circuit.

The invention relates to an undervoltage release, which comprises a capacitive charging booster type starting power circuit, a self feedback dual-limit detection circuit, a relay switching circuit and an electromagnet coil. The starting power circuit is connected with the self feedback dual-limit detection circuit, the relay switching circuit and the electromagnet coil, and the control output end of the self feedback dual-limit detection circuit is connected with the control input end of the relay switching circuit; the relay switching circuit comprises a relay; when the voltage of a power grid is kept at a release voltage or higher than the release voltage after reaching a pull-in voltage, a relay coil and the electromagnet coil form a serially connected loop; when the voltage of the power grid is lower than the release voltage, the electromagnet coil is in a state of an open circuit; and when the voltage of the power grid restores to the pull-in voltage or higher than the pull-in voltage, the relay coil and the electromagnet coil form a serially connected loop again. The undervoltage release has the advantages of low calorific power, big release instant starting torque, very simple circuit, reliable work, high efficiency and the like.

The invention discloses a wall climbing robot. The wall climbing robot comprises a vehicle body, four driving units and four crawler belts, wherein two of the driving units are respectively mounted on the left side and the right side of the vehicle body, and the four driving units are connected with the crawler belts separately; each of the crawler belts comprises a plurality of crawler belt plates in annular connection, each of the crawler belt plates comprises a magnetism conductive mounting plate, a magnetism isolating plate and permanent magnets, the magnetism isolating plate is arranged on the magnetism conductive mounting plate, and the two permanent magnets in contrary magnetism are embedded at lateral symmetrical positions of the magnetism isolating plate; the magnetism of one of the two adjacent permanent magnets on the two adjacent crawler belt plates is contrary to the other; the vehicle body comprises a frame, a turning and mounting device and a cleaner main body, wherein one end of the turning and mounting device is connected with the front end of the frame through hinges; the cleaner main body is arranged at the central position of the turning and mounting device; an pneumatic motor is arranged in the vehicle body. The wall climbing robot disclosed by the invention has the advantages of being flexible and smooth, being good in loading property, being wide in cleaning range, and being high in magnetic adsorption efficiency, and is suitable for hulls and large-scale tank bodies.

The invention discloses a double-winding permanent magnet motor, which consists of a rotor part, a stator part and a position detection part, wherein the rotor part consists of a motor shaft, a rotor core, a magnetic steel, a bearing and the like; and the stator part mainly comprises a stator shell, a stator core, a large-torque winding, a high-speed winding, an end cover and the like. Compared with the conventional product, the load property of the double-winding permanent magnet motor is very accordant with that of an electric vehicle; when the vehicle is started or climbs a slope, the large-torque winding of the motor works, and the motor outputs a large torque; and when the vehicle needs to run at a high speed, the high-speed winding of the motor works, and the motor can provide a high rotational speed to drive the vehicle to run at the high speed. The double-winding permanent magnet motor has the characteristics of wide speed range, large low-speed motor torque, good high-speed performance, high efficiency, good regenerative braking effect, small volume, light weight, high specific power, high reliability and relatively simple control system thereof, and is an ideal driving motor of the electric vehicle.

A self-strong excitation bidirectional high-voltage gain interleaved switch reluctance motor power converter system comprises a main circuit, an excitation power supply and a bidirectional DC-AC-DC, wherein the main circuit, the excitation power supply and the bidirectional DC-AC-DC are mutually connected. The main circuit is simple in structure, and each phase winding is divided into two branchesconnected in parallel, so that the effect of enhanced excitation is achieved. The storage battery of the excitation power supply has an automatic charging function, and the bidirectional DC-AC-DC ensures that the switched reluctance motor can generate power when operating clockwise and electrically operates in counterclockwise direction. The functions of isolation, high-frequency transformation and high voltage gain is provided. The interleaved control mode during electric operation in counterclockwise direction can reduce the torque pulse. The system is more suitable for power generation / electric operation in different time period.

The invention relates to a large support roller overlaying workstation and an operation method thereof. The large support roller overlaying workstation comprises a roller support device, a roller driving device, an online heating system, a welding system and a flux recovery system; a support roller is supported and positioned by the roller support device, and can be driven by the roller driving device to rotate; a door type heating cover of the online heating system covers the support roller to form a closed cover body; an insulation layer and an induction electric heating device are arranged on the inner wall of the cover body; a welding gun can vertically move to extend into the door type heating cover body; and the flux recovery system is arranged at the bottom of the door type heating cover. The support roller is heated and insulated in the closed cover body; multiple sets of welding mechanisms can synchronously perform welding; a flux can be automatically recovered; the continuous process of the large support roller as online preheating, welding, insulation and tempering can be realized; and the large support roller overlaying workstation is convenient for operation, high in automation degree and precise in temperature control, facilitates improvement of the overlaying quality of the support roller, improves the repair efficiency, and fills the blank of the technology.

The present invention discloses a method and system for position estimation of a switched reluctance motor on the basis of a pulse current envelope, belonging to the field of the switched reluctance motor control technique. The method for position estimation of the switched reluctance motor on the basis of the pulse current envelope comprises: performing initialization setting, extracting a pulse current envelope of a non-conducting region, extracting a pulse current envelope of a conducting region, extracting a complete period pulse current envelope, and determining positions, etc. The system for position estimation of the switched reluctance motor on the basis of the pulse current envelope comprises: an initialization module, a module of extracting a pulse current envelope of a non-conducting region, a module of extracting a pulse current envelope of a conducting region, a module of extracting a complete period pulse current envelope, and a position determination module. The method and system for position estimation of a switched reluctance motor on the basis of a pulse current envelope are simple, are capable of effectively estimating a position of a motor rotor, and are high in versatility, with no need for additional hardware.

The invention belongs to the technical field of automatic driving devices for vehicle tests and relates to a pulley wire-type driver robot for vehicle tests, and the robot comprises a fixed bottom plate, a rotating bottom plate arranged on the fixed bottom plate, clutch mechanical legs of the same structure, a brake mechanical leg, a throttle mechanical leg and a shifting mechanical arm, wherein the individual mechanical legs are arranged on the rotating bottom plate and driven by corresponding driving units of the same structure to perform reciprocating linear motion along a pedal pressing direction; each mechanical leg comprises a telescopic link outer tube, a telescopic link inner tube, a spherical universal joint and a clamping plate for fixing the mechanical leg on a pedal; and the driving unit comprises a servomotor, a speed reduction unit, a driving rod, a compression spring, a steel wire rope, a large pulley and a small pulley. The pulley wire-type driver robot for the vehicle tests has the advantages of occupying less space, having light weight and long service life and being installed rapidly and conveniently.

A rotary-type hydrodynamic valve is provided, which comprises a hydraulic motor, a valve and a supporter connecting the hydraulic motor with the valve. The top end of the valve rod of the valve is in thread connection with a driving screw which is arranged on the hollow output shaft of the hydraulic motor. When the hydraulic motor runs, the driving screw on the hollow output shaft can drive the valve rod to rotate and thus to move a valve plate up and down, thereby opening or closing the valve. The inventive rotary-type hydrodynamic valve has large starting torque; can change the driving torque along with the load change when opening or closing the valve; can set, display and control the opening or closing state of the valve; can ensure the valve to be opened or closed reliably and safely; can prolong the service life and reduce the noise; and can improve the automation degree and allow the manual operation.

The present invention discloses a motor driving system used for workover treatment. The motor driving system used for workover treatment is characterized in that a three-phase power supply is connected with a controllable rectifier via a filter circuit A, the rectification output end of the controllable rectifier is connected with a filter circuit B and a frequency converter orderly via a DC bus, and the output end of the frequency converter is connected with the power supply input end of a frequency conversion motor; a PLC is connected with the control input ends of a super capacitor controller and the controllable rectifier separately via the on-site buses, the high voltage side anode of a bidirectional DC-DC converter is connected with the rectification output end anode of the controllable rectifier, and the high voltage side cathode of the bidirectional DC-DC converter is connected with the rectification output end cathode of the controllable rectifier; the low voltage side anode of the bidirectional DC-DC converter is connected with the anode of a super capacitor module, and the low voltage side cathode of the bidirectional DC-DC converter is connected with the cathode of the super capacitor module; the signal output end of the super capacitor module is connected with the signal acquisition input end of the super capacitor controller, and the super capacitor controller is connected with the control input end of the bidirectional DC-DC converter.