698 results about "Motor activation" patented technology

A rotary sensor that outputs two analog signals, such as one sine wave and one cosine wave and has multiple periods within one period of the electrical angle of a motor is employed. The motor is energized at each position for a specified length of time upon its startup by using multiple electrical angles corresponding to the multiple candidate absolute angles obtained from the rotary sensor signal as the initial position of the motor, and the electrical angle at which the motor acceleration becomes maximum is determined as the absolute angle. While the motor drive is in operation, on the other hand, the phase difference Δθ between the phase of the motor at the counter electromotive voltage and the control phase is directly computed from the parameters of the motor, sensed current, voltage command and angle speed so as to correct the shifted position. A high-efficiency motor drive unit with improved maintainability of rotary sensor and improved accuracy of sensing the magnet pole position of a permanent magnet synchronous motor that accelerates and decelerates very quickly in a wide range of speed is realized.

The invention includes a programmable emergency-stop circuit apparatus and method that provides advanced function not found in other systems. The circuit centralizes the control of high voltage motor power into one place, by providing connections for, in its minimum configuration, several different kill switches, a motors-on button, and an AC motor power relay coil. In the present invention, kill switches, test inputs, emergency-stop and motors-on buttons, computer ready and watchdog signals are all conveniently connected in one location, alongside the AC motor power relay coil driver. Programmable options exist for testing kill inputs online, while the emergency stop is energized.

A position sensor-free double closed-loop speed regulation control method for a brushless DC motor comprises the following steps: (1) initializing functional modules and peripherals; (2) opening AD (Analog-Digital) interruption and protection interruption; (3) detecting the start key of the motor, judging whether to start the motor, if yes, executing the next step, and if not, continuing to execute the step; (4) starting voltage detection, judging whether the voltage of a main circuit is larger than starting voltage, if yes, executing the next step, and if not, returning to the step (3); (5) entering a motor starting subprogram and beginning operating the motor; (6) entering a double closed-loop speed regulation subprogram, and regulating the rotational speed and the current of the motor according to voltage value; and (7) detecting a motor brake key, judging whether to press the key, if yes, entering a motor brake subprogram, and if not, returning to the step (3). The method provided by the invention overcomes the defects of larger size, low rotational speed accuracy and the like of the conventional motor controller, can accurately control different rotational speeds of the motor, and can simultaneously realize counter electromotive force zero-cross comparison position sensor-free reversing and Hall position signal reversing.

Disclosed is a sanitary or no-touch dispenser which dispenses sheets of a web material, such as a paper towel. The disclosed dispenser provides the web material to a user by using both manual and electronic means to dispense the sheet. This is accomplished by having a motor engagably connected to an actuator roller. The motor is activated by a motor activation means, such as a switch. The motion of the actuator roller, which is started by the user grabbing and pulling a tail of the web material extending from the dispenser, causes the motor activation means to activate the motor which in turn drives the actuator roller to continue it its rotation motion to dispense the sheet from the dispenser.

Disclosed is a method and device for controlling the startup of a synchronous reluctance motor. The device includes: a voltage injector which generates injection voltages to estimate an initial position of the rotor; a motor drive voltage generator which converts stationary-coordinate-system voltages including the injection voltages to three-phase motor drive voltages and applies the three-phase motor drive voltages to the motor; a current extractor which extracts response current components iα-inj, iβ-inj in respect to the injection voltages from two-phase stationary-coordinate-system currents converted from three-phase currents detected upon rotation of the motor; and a position / speed estimator which extracts response current components related to a rotor position from the response current components iα-inj, iβ-inj in respect to the injection voltages to calculate a rotor position error (e), and estimates the speed and position {tilde over (ω)},{tilde over (θ)} of the rotor from the calculated rotor position error (e).

The invention discloses a fan start state detection and start control method. A fan comprises a direct current motor; the direct current motor comprises an MCU processor and an IGBT. The method comprises: firstly, detecting the start state of the direct current motor, and then controlling the start of the direct current motor. According to the fan start state detection and start control method provided by the invention, the start reliability of the motor of the fan on various complex operation occasions is improved; the start universality of the fan is improved; and matching of different inertia fan loads is realized.

A motor driving apparatus includes a pulse-width modulator and a PWM frequency switch for switching a carrier frequency of the modulator. The PWM frequency switch changes a carrier frequency in a start-up period of the motor to another frequency when the motor enters into a regular rotation. The carrier frequency in the start-up period is set at a lower level than that in the regular rotation period, so that the driving apparatus can reduce power-loss generated in the start-up period by switching actions of respective driving elements forming a first and a second drivers. In the regular rotation period, the driving apparatus performs PWM-driving with a high enough carrier frequency, so that the motor driven by this driving apparatus can realize accurate rotation.

the invention relates to a performance testing system and a performance testing method for a portable motor, belongs to the field of performance testing of motors, and aims at solving the problem that a miniature special motor under 2Nm can not be tested by the existing measuring device. The performance testing system comprises a device bracket, a power unit, a frication unit, a measuring unit, an elastic loading unit and an electronic control unit, wherein the device bracket provides support and positioning for the power unit, the frication unit, the elastic loading unit, the pressure measuring unit, and the electronic control unit. The performance testing method comprises the following steps of: carrying out system initialization, starting the tested motor, driving an electronic drive pusher to push by a pusher motor driving circuit so as to carry out loading testing, obtaining corresponding rotation speeds and currents by testing, and drawing a current-torque curve of the tested motor according to all the obtained loading testing, thus obtaining the performance of the tested motor. The system and the method are used for testing the mechanical properties of the miniature special motor under 2Nm.

The invention discloses an electromobile driving system vector control method using double inverters. The electromobile driving system vector control method includes the following steps: collecting three-phase stator current, rotor position and rotating speed in an unwinding permanent magnetic synchronous motor, wherein the three-phase current is subjected to 3S / 2R conversion to acquire current under a two-phase rotating coordinate system. A system adopts the vector control method with id equal to 0, a stator voltage instruction under the two-phase rotating coordinate system is acquired through double closed-ring control of a rotating speed outer ring and a current inner ring, stator voltage under the two-phase static coordinate system is acquired through 2R / 2S coordinate conversion, control pulse of the double inverters is acquired through a single-power-source double-inverter SVPWM (space vector pulse width modulation) module, and switch devices of the double inverters are triggered to realize vector control of double-inverter SVPWM of the unwinding permanent magnetic synchronous motor. The electromobile driving system vector control method has the advantages that the unwinding permanent magnetic synchronous motor is quick to start, high in overload capability and good in speed adjusting performance; due to the single-power-source double-inverter SVPWM, voltage level of the system is increased, and safety and reliability of the system are guaranteed.

The invention discloses an electric bicycle control method based on a permanent magnet brushless direct current motor. According to the method, subdivided rotor position information is used for directly starting the motor, and the switching procedure from square wave starting to sine wave starting in a traditional control method is omitted. The electric bicycle control method relates to a rotor section calculation module, a speed calculation module, an angle subdivision module, a phasing adjustment module, a speed control module, a current-limiting control module, a waveform modulation module, a three-phase inverter and a motor starting module. By the adoption of the method, control efficiency and control performance are improved, and currents passing through a motor winding are in a sine wave mode when the motor operates; compared with a traditional square wave control method, torque pulsation is small, motor running noise is low, and the service life of the motor can be prolonged; compared with a traditional space vector control method, the algorithm is simple, implementation is easy, the requirement for a microprocessor is low, and high cost performance is achieved.

The invention discloses a starting method of a senseless permanent magnet synchronous motor, comprising the following steps: S10), after short-circuiting a motor winding, detecting a motor induced current by driving a sampling module of a controller; S20), determining whether the motor induced current is less than a predetermined value of induced current, if so, proceeding to step S30), or if not,proceeding to step S40); S30), performing open-loop start control; S40), determining whether the motor is in a forward or reverse rotation state, if in the forward rotation state, proceeding to stepS50), if not, proceeding to step S60); S50), performing forward rotation closed-loop vector start control; and S60), performing reverse rotation closed-loop vector start control. The starting method ensures the fast and low-current high-efficiency start when the permanent magnet synchronous motor is stationary or tends to be stationary, realizes fast closed-loop vector control under strong downwind or upwind conditions, reduces energy consumption, shortens start time, and makes motor start smooth.

A motor starter is disclosed. The motor starter includes control circuitry integrally arranged with at least one current path and a processor included in the control circuitry. The motor starter further includes at least one processor algorithm residing on the processor, the at least one processor algorithm containing instructions to monitor characteristics of current on the at least one current path and to provide data pertaining to a condition of the at least one current path. The motor starter further includes a micro electromechanical system (MEMS) switch disposed on the at least one current path, the MEMS switch responsive to the control circuitry to facilitate the control of an electrical current, passing through the at least one current path.

The invention discloses an electronic control hydraulic driving system used for industrial vehicles. Functions such as walking, slope sliding, speed limiting, oil adding, steering, lifting and inclining of the vehicles are achieved by using a motor, a controller and a variable hydraulic system only, and meanwhile kinetic energy recycling, potential energy heavy load recycling and light load unloading are achieved. The system has the advantages that by means of a walking speed limiting device, the speed of the vehicles is limited, walking of the vehicles is stable, and automatic oil supplying can be conducted by the hydraulic system in the process of the slope sliding and braking; by adopting a combination type oil tank, oil cooling type installation of mechanical and electrical integration can be achieved, electric elements are not in contact with air, noise of the hydraulic system is reduced, and functions of water proofing, explosion proofing and cooling are achieved; interlocking is carried out on a walking device, a lifting device and an inclining device by the hydraulic system, so that the walking, the lifting and the inclining cannot be conducted at the same time, superposed large currents do not exist, and the discharge capacity efficiency of a storage battery is improved; startup from zero to load currents is completed in 600 millimeters by starting currents of the motor, large starting currents do not exist, and the energy can be saved by more than 15%.

A device controller synchronizes a counter to the detection of sunrise or sunset by photoelectrically sensing daylight, thereby establishing an approximate time reference for scheduling the timing of device activations to occur at any time of day or night. An uncalibrated method of measuring sunlight yields more reliable scheduling, relative to sunrise and sunset events. The integral approximate time reference is kept synchronized, even if occasional faults in detection of sunrise or sunset occur. The rules employed to establish and maintain synchronization, and the dynamically variable rules of evaluating changes in light intensity, contribute to the reliable performance of the controller apparatus. Inherently self-adapting and automatic, a potentiometer for setting a time parameter input and a push-button for setting a time parameter input are combined in the apparatus in such a way to yield further utility without complicating the programmability. Additionally, for animal feeder applications, a test mode utilizes <DEL-S DATE="20030318" ID="DEL-S-00001" / >a modulates<DEL-E ID="DEL-S-00001" / > activation of the feed motor to produce audible warning of imminent motor activation.

The invention discloses an inductive brushless direct current motor drive method which is characterized by comprising the following steps: (1) after a power supply is started, a system automatically enters an inductive motor starting mode and then operates in an inductive drive mode; (2) the system calculates the rotating speed n of a motor according to a signal of a rotor position sensor; and (3) whether the rotating speed n of the motor is more than the threshold rotating speed na, at which the preset inductive drive is converted to noninductive drive, is judged, etc. The inductive brushless direct current motor drive method not only effectively reduces the influences of the position error of a Hall sensor on the operating efficiency and the noises of the brushless direct current motor, but also effectively increases the yield of production of a single-phase brushless direct current motor, so that the production cost of the motor is lowered.

The invention comprises a programmable emergency-stop circuit apparatus and method that provides advanced functions not found in other systems. The circuit centralizes the control of high voltage motor power into one place, by providing connections for, in its minimum configuration, several different kill switches, a motors-on button, and an AC motor power relay coil. In the present invention, kill switches, emergency-stop and motors-on buttons, computer ready and watchdog signals are all conveniently connected in one location, alongside the AC motor power relay coil driver.

A system used in a protective relay for motors for transitioning the value of the trip threshold to a motor start (stall) condition. The calculated transition trip threshold value follows I2t, specifically, the current to the motor. The transition trip threshold value includes a small fixed initial (offset) value, so that the increase in the trip threshold during transition to the actual start condition threshold value is always slightly ahead of the increase in the I2t value, preventing a trip until the input current exceeds the final trip threshold for the start condition.

The invention discloses a double clutch-based torque precontrol system and method. The system comprises a transmission control unit, double clutches, a transmission and a motor control unit; the double clutches are connected with a motor; a first clutch in the motor is connected with an engine; the transmission control unit determines whether to carry out torque precontrol on a target clutch of the double clutches or not according to a rotational speed of the motor, the electric quantity of the motor or the opening degree of an accelerator and according to whether the first clutch normally works or not, whether a working state of the first clutch is non disengaging or not and whether a hybrid vehicle is in electric-only drive or not; and if yes, a first control signal is output to lower the working pressure of the target clutch until a difference between the rotational speed of the motor and the rotational speed of the transmission is kept in a preset range, a torque value of the target clutch is maintained, and a starting signal is sent to the motor control unit. By applying the embodiment of the invention, the comfort of the whole vehicle in the process of starting the engine by the motor is improved.

The invention discloses a control method of an electric toothbrush. The electric toothbrush comprises a pressure sensor, a deformation resistor and a control board. The control method comprises the following steps that the electric toothbrush is controlled by the control board to enter an awakening state; after the electric toothbrush enters the awakening state, when the deformation produced by ahousing of the electric toothbrush is detected by the deformation resistor, a deformation signal is transmitted, and the electric toothbrush is controlled by the control board to switch modes; when pressure information stressed on a toothbrush head is detected by the pressure sensor, a pressure signal is transmitted, a driving motor in the electric toothbrush is controlled by the control board tobe started, and the electric toothbrush enters a tooth brushing state; and after the tooth brushing state is entered, if the situation that the pressure information stressed by the toothbrush head isan initial pressure value is detected by the pressure sensor, the driving motor is controlled by the control board to be switched off, and the electric toothbrush enters the awakening state. Through the adoption of the control method disclosed by the invention, functions of non-key automatic awakening, automatic starting and automatic mode switching of the electric toothbrush can be realized.

An electrical motor activation method for an electric motor including a rotor, connected to a motor shaft, and a stator having brushes. The stator comprises multiple commutator laminations for the commutation of windings disposed on the rotor and is activated by a pulsed or linearly controllable power source. The motor shaft is connected to a radially driven load, in particular a pump, which has a nonlinear torque curve via a motor revolution. A waviness signal is obtained from a voltage potential applied to the motor and / or from the motor current and rotor position information is obtained from the curve of said waviness signal.

The invention relates to an electric tool and electric tool control method. The electric tool consists of a working head, a motor which drives working head to output power, a power supply which provides power for motor, detecting elements which detect the parameter for load of characterization working head and output detection signal, a control module which receives detection signal and controls working head discontinuously output power depending on detection signal to judge the decrease of load for working head. The electric tools, with the situation which the load of working head decreases during the installation process, detecting element can detect the parameter for load of characterization working head changed for the changing of the installing condition of screw, and then output detection signal to control module. Control module discontinuously outputs power depending on the detect sent by detecting element, thereby achieving the goal that monitors screw slip or working head jumps out recessed groove of screw head, changes the working condition of the electric tool and improves the working efficiency in installing screws.

The invention relates to the technical field of electrical application equipment in the field of machinery, in particular to an intelligent motor which comprises a rotor, a stator, a rotating shaft and a motor shell. The stator is fixed on the inner wall of the motor shell, the rotating shaft penetrates the stator, the rotor is positioned inside the stator, and two ends of the rotating shaft are connected with the motor shell. The intelligent motor is characterized by comprising processors and a display unit, and a main processor is connected with a motor start protecting device and a motor rotating speed adjusting device. The intelligent motor has the advantages that the circumstance of overlarge current when the motor is started is reduced, and overhigh speed of the motor, overheating and burning of a coil winding during overloading in the process of working are prevented.

A motor controller system comprises solid state switches for connection between a single phase to three phase static converter and motor terminals for controlling application of three phase power to the motor. Sensors sense power from the static converter. A control is connected to the sensors and the solid state switches for controlling operation of the solid state switches to run the motor. The controller includes a three phase detection scheme for preventing operation of the solid state switches in the absence of desired three phase power from the static converter. A motor start scheme disables the three phase detection scheme for a select time after a motor run signal.

The invention discloses a control method for quick starting of an engine of a hybrid electric vehicle. According to the method, the driving mode is firstly selected to be the ECO mode or the SPORT mode, then an engine starting instruction is given for starting, during starting, the starting torque of a high-voltage generator is adjusted firstly until the rotating speed of the engine is in the expected rotating speed range, when normal oil injection of the engine is realized, the high-voltage generator is switched from the electric mode to the generation mode, and meanwhile, an electric energycompensation mechanism is triggered, so that electric energy consumed by the high-voltage generator during quick starting is quickly compensated, and the over-discharge fault of a battery is avoided until the high-voltage generator enters the normal generation working state, and quick starting is completed at the moment. By the aid of the design, on the basis that the driving intention of a driverand real-time working conditions of the vehicle are identified effectively, quick starting of the engine can be realized, the ultimate power requirement can be met, and failure of a high-voltage power system and mechanical power components can be avoided.

The invention discloses a control method for steplessly adjusting operation of a high power water pump or a fan. A controller controls a frequency converter, and the frequency converter controls a motor; and controlled working modes are manually or automatically switched according to values of the power of the motor and the power of the frequency converter. According to the control method disclosed by the invention, the frequency converter with the capacity which is 1 / 2 of the capacity of the motor is adopted to control the motor of the pump or the fan to be started, so as to realize stepless control over the rated flow of about 0 to 80 percent, and the full-load operation requirement under a special condition is met. The low capacity frequency converter controls the high power motor, thus reducing the surplus of use of the frequency converter, saving energy and decreasing the equipment investment; impact on a power grid is reduced; meanwhile, the impact influence on a water pump impeller, a pump shaft and a bearing can be reduced to the maximum extent, the service lives of equipment and valves are prolonged, and the maintenance cost of equipment pipes is saved; by stepless adjustment of the water amount and the air volume, production operation parameters can be precisely controlled, and the engineering requirement can be met; and multiple interfaces can be connected with a computer and a network to realize intelligent control.

The invention discloses an intelligent control method for an automobile electric window. The intelligent control method comprises the following steps of: I, starting an electric window motor, starting a learning program, acquiring a current feedback value with an MCU (Micro Controller Unit), selecting peak value current IInrush from the acquired current feedback value, computing the motor locked-rotor current value of the action according to a formula, i.e., IStall:IStall is approximately equal to IInrush*P, taking 80-85 percent of P serving as a motor parameter, and storing the motor parameter into a temporary storage unit of the MCU; and II, acquiring the current feedback value of the motor at a certain time interval at the end of the learning program, comparing the current feedback value with the locked-rotor current value, stopping motor driving output if the current feedback value is greater than or equal to the locked-rotor current value, and continuing to perform the step II if the current feedback value is smaller than the locked-rotor current value. In the invention, intelligent control is performed by using the MCU, so that automatic correction of the motor locked-rotor current value is driven by using the electric window, and the service life of the electric window is prolonged.

A starting device and starting method for a single-phase induction motor, comprising: a stator (B) having a running coil (B1) and a starting coil (B2); a running switch (S1) and a starting switch (S2) which is conducted to an open condition upon completion of the motor start. The starting device comprises: a starting circuit (10) including a control unit (11) which receives, from a current sensor (RS), signals representative of the current level being supplied to the stator (B), said control unit (11) being connected to the running and the starting switches (S1 and S2), for instructing the open and closed conditions thereof, the open condition of the starting switch (S2) being defined when the ratio (K) between the present current level (Ia) supplied to the stator (B) and the starting current level (Ip), upon the closing of the starting and the running switches (S1 and S2), reaches a predetermined value (Km).