397 results about "AC motor" patented technology

A heating system for heating a power battery and an electric vehicle are provided. The power battery includes a first battery cell group (1) and a second battery cell group (2) connected in series. The heating system includes an inverter (3), an AC motor (4), a first controller (6), and a connection line (S1), in which the intermediate points of three bridge arms of the inverter (3) are connected to the tips of three-phase coils of the AC motor (4) in one-to-one correspondence, the first controller (6) is used to input a driving signal to the inverter (3), the first battery cell group (1), the second battery cell group (2), the inverter (3), the AC motor (4), and the connection line (S1) constitute an AC self-heating loop, and at least one heating device (7) is connected in series to the connection line (S1), and the heating device (7) is used to heat the first battery cell group and / or the second battery cell group.

Provided is a motor control device capable of appropriately achieving both low loss and low NV in a scene where a plurality of surrounding environments and a plurality of vehicle states overlap. The motor control device is connected to an AC motor and PWM-controls a power converter that performs power conversion from DC power to AC power. The motor control device includes: a plurality of PWM pulse patterns; a pulse pattern determination unit that sets a pulse pattern for performing the PWM control; an evaluation unit that determines a priority of a total loss of the AC motor and the power converter and vibration noise of the AC motor; and a loss / NV calculation unit that calculates a value of the total loss and a value of the vibration noise in torque and rotation speed for each pulse pattern. The evaluation unit determines the priority on the basis of a parameter regarding at least one of a surrounding environment, mode designation by intention of a driver, a remaining battery amount, a driving operation point, and a vehicle state, and the pulse pattern determination unit sets the pulse pattern by using the priority determined by the evaluation unit, the value of the total loss, and the vibration noise.

The invention relates to the field of motor control, in particular to a fault-tolerant control method, electronic equipment for implementing the method and a computer readable storage medium. The method comprises the following steps of determining a voltage vector controllable range which can be used for controlling the stator voltage of the motor according to the type of a short-circuit bridge arm in response to a detected single-bridge-arm short-circuit fault of an inverter used for driving the alternating current motor; converting the voltage vector controllable range into a corresponding rotor angle controllable range; when the motor rotor angle is out of the rotor angle controllable range, controlling the AC motor to enter an active short-circuit state; and when the rotor angle of the motor is in the rotor angle controllable range, controlling the alternating current motor to output target torque by using current closed-loop control and discontinuous pulse width modulation, so that the average torque output by the alternating current motor in one electric period reaches an expected value.

A motor vehicle includes an AC (alternating current) electric motor having a stator with a plurality of stator windings, a rechargeable source of stored electrical energy, and an inverter coupled to the rechargeable source of stored electrical energy and to the AC electric motor. The system also includes one or more controllers collectively programmed to switch the inverter to provide alternating current propulsive energy from the rechargeable source of stored electrical energy to the plurality of stator windings and, using at least one of the stator windings as a boost inductor, switch the inverter to step up a voltage at a charging input coupled to the inverter to charge the rechargeable source of stored electrical energy.

Electrically powered vehicles with redundant power distribution circuits employ inverters and a multi-phase alternating current (AC) motor. An electrically powered vehicle includes batteries, inverters, interphase transformers, and a three-phase AC motor. Each of the inverters generates a three-phase AC input from power supplied by an associated one of the batteries. The interphase transformers generate drive phases for the AC motor from the three-phase AC inputs generated by the inverters.

A motor power source regulation circuit, a control method and an electronic device are provided. The motor power source regulation circuit includes a power factor correction circuit, an isolation circuit, a first power source conversion circuit, a second power source conversion circuit and a control circuit. The isolation circuit includes a first switch sub-circuit and an isolation transformer. The power factor correction circuit regulates an AC input signal to a first DC signal. The first switch sub-circuit converts the first DC signal to a first AC signal. The isolation transformer converts the first AC signal to two or more second AC signals. The first power source conversion circuit converts the second AC signal to a DC drive signal and outputs it to a DC motor. The second power source conversion circuit converts the second AC signal to an AC drive signal and outputs it to an AC motor.

An alternating current (AC) propulsion system for a boat. The AC propulsion system includes a trolling motor operably mountable to the boat and an AC power system. The trolling motor has a head and a motor housing secured at upper and lower ends, respectively, to an elongated shaft. An AC motor is disposed in the motor housing and drives a propeller. The AC power system includes a generator and a variable frequency drive (VFD). The VFD includes a VFD AC input and a VFD AC output. The VFD AC input is electrically coupled to an AC output of the generator. The VFD AC output is operably electrically coupled to the AC motor of the trolling motor. In some embodiments a second trolling motor with an AC motor may be electrically coupled to a second VFD AC output of the VFD.

The invention discloses an alternating current motor fractional pole-to-branch ratio winding arrangement method, belongs to the field of motors, and aims to solve the problem that high-quality and high-efficiency design of an alternating current motor fractional pole-to-branch ratio winding is difficult to realize. The method comprises the following steps: 1, constructing a slot electromotive force vector; 2, setting a target threshold value; carrying out initial coding on the winding arrangement matrix, taking the initial winding arrangement matrix as a current solution, and calculating the fitness of the current solution; 3, obtaining a neighborhood solution of the current solution of the winding arrangement matrix based on a neighborhood generation method, and calculating the fitness of the neighborhood solution; if the fitness of the neighborhood solution is lower than that of the current solution, updating the current solution into the neighborhood solution; otherwise, continuing to generate a neighborhood solution and judging whether the winding arrangement matrix needs to be reinitialized according to an early stop condition; and 4, when the branch asymmetry degree is smaller than a target threshold value or the winding arrangement matrix reaches the maximum initialization frequency, updating the optimal solution of the winding arrangement matrix by using the current solution of the winding arrangement matrix, and decoding the optimal solution to obtain an optimal fractional pole-to-branch ratio winding arrangement scheme.

The invention relates to an AC motor synchronous modulation method based on a phase-locked loop and a PWM generator, and belongs to the technical field of motor control, and the method comprises the steps: determining a voltage phase angle outputted by an AC motor based on an output voltage of vector control of the AC motor, and converting the voltage phase angle into a synchronous phase angle of a carrier wave based on a carrier wave ratio; the synchronous phase angle is used for determining a sine input signal of the phase-locked loop; determining a cycle count increment adjustment value of the carrier based on the sinusoidal input signal; and correcting the cycle count increment value of the carrier based on the cycle count increment adjustment value. According to the alternating current motor synchronous modulation method based on the phase-locked loop, the period ratio and the phase relation of the carrier wave and the modulation wave are fixed, so that the harmonic content of the output voltage and the harmonic content of the output current are kept consistent in the synchronous modulation process, extra harmonic voltage and current cannot be generated, and overall harmonic treatment of a system is facilitated.

A motor control device that controls driving of an AC motor connected to a power converter performing power conversion from DC power to AC power, the AC motor driven using the AC power, includes a carrier wave generation unit that generates a carrier wave, a carrier wave frequency adjustment unit that adjusts frequency of the carrier wave, and a PWM control unit that performs pulse width modulation using the carrier wave on a voltage command corresponding to a torque command to generate a PWM pulse signal for controlling operation of the power converter, wherein the carrier wave frequency adjustment unit adjusts the frequency of the carrier wave so as to change a phase difference between the voltage command and the carrier wave based on magnitude of vibration for each circular order of electromagnetic excitation force generated circularly in a radial direction of the AC motor.

The invention relates to the field of air conditioner control, and provides a control method and system for undervoltage of an outdoor alternating current motor of a variable frequency air conditioner, and the control method comprises the steps: obtaining the power supply voltage of the air conditioner, continuously monitoring the temperature of an outer coil when the power supply voltage is lower than a preset value, and recording the temperature change rate of the inner and outer coils in a first time period; first adjustment is conducted on the duty ratio of an outer fan driving motor according to the temperature change rate of the outer coil pipe, and first operation or second operation is executed in the second time period length equal to the first time period according to the change direction of the temperature change rate of the outer coil pipe; the second operation comprises the steps that when the temperature change rate of the outer coil pipe is a negative value, if the compressor frequency is lower than the preset working frequency, the compressor frequency is increased according to the temperature change rate of the outer coil pipe, the current compressor frequency and the preset working frequency, and if the compressor frequency is equal to the working frequency, the compressor frequency is increased. And second adjustment is conducted on the duty ratio of the outer fan according to the environment temperature and the current duty ratio of the outer fan.

An alternating current (AC) motor system includes an AC motor with a rotor and a stator with multi-phase AC stator windings. The system also includes a power inverter that generates a multi-phase AC voltage, an AC bus that connects the power inverter to the stator windings, an AC choke that surrounds the AC bus, and a current sensor with a coil wound on or surrounded by the AC choke. The current sensor measures common mode current in the AC bus, and is used in pulse width modulation or slew rate control of the power inverter, ensuring smooth operation and reducing the risk of damage due to common mode current.

This AC motor control device comprises: a current detector; a first coordinate converter that converts a detection current before conversion, which is the detection result detected by the current detector, into a two-axis detection current which is a current on two rotating axes; a two-axis current filter that reduces the noise component of the two-axis detection current; a second coordinate converter that converts the filtered two-axis current into a filtered three-phase current in a stationary coordinate system; a first controller that generates a first three-phase voltage command on the basis of the two-axis detection current or the filtered two-axis current; a second controller that generates a second three-phase voltage command on the basis of the filtered three-phase current; and an inverter that applies a voltage to an AC motor on the basis of the first and second three-phase voltage commands.

The utility model discloses an AC motor encoder installation structure, which comprises a stator, a rotor, a front end cover, a rear end cover, a casing, a motor shaft and an encoder, the encoder comprises an encoder gear ring and an encoder sensor, the encoder gear ring is installed on the motor shaft and located in an inner cavity of the rear end cover, and the encoder sensor is installed on the motor shaft and located in an inner cavity of the rear end cover. The encoder sensor is provided with a cylindrical barrel and a barrel mounting plate fixed with the barrel, the barrel mounting plate is mounted on the outer wall of the casing, a protruding block protruding inwards is arranged on the inner wall of the rear end cover, a through hole is formed in the protruding block in the radial direction of the rear end cover, and the through hole is communicated with the barrel mounting plate. The diameter of the through hole is larger than or equal to the diameter of a cylinder body of the encoder sensor, and the cylinder body of the encoder sensor is arranged in the through hole of the protruding block. According to the utility model, the installation position precision of the encoder is improved, the influence of internal and external vibration of the motor on the encoder in the operation process can be weakened or prevented, and the signal acquisition and transmission accuracy and reliability of the encoder are improved.

The invention discloses a non-cascade control method, device and system for an alternating current motor. Firstly, in order to solve the problem of non-matching disturbance suppression, a nonlinear disturbance observer is designed to achieve estimation and compensation of matching disturbance and non-matching disturbance in a system, a corrected time-varying sliding mode surface is provided, and the sliding mode surface can reduce the influence of disturbance estimation errors to a certain extent. In addition, a current constraint problem under non-cascade control is considered, and a nonlinear damping item is introduced to realize dynamic constraint of the current. Compared with a traditional non-cascade control method, the method provided by the invention has stronger anti-interference capability, and can ensure that the current of the motor runs within a safe range.

1. The name of the design product: AC motor radiator. 2. The use of the design product: for AC motor radiating. 3. The design points of the design product: in shape. 4. The picture or photo that best shows the design points: design 1 perspective view 1. 5. Design 1 is designated as the basic design.

1. Name of the designed product: Integrated frequency converter (IX210 WellBUS). 2. Use of the designed product: The designed product is used for changing the frequency of the power supply of the motor to control the power control equipment of the AC motor. 3. Design points of the designed product: in shape. 4. Picture or photo best showing the design points: perspective view 1.

The application provides a method for observing rotor flux of an alternating current motor, and belongs to the technical field of motor control. The method comprises the following steps: calculating rotor observation flux based on a first voltage-type flux calculation model and stator voltage and stator current in a two-phase static coordinate system; obtaining an amplitude deviation by subtracting the amplitude of the rotor rated flux from the amplitude of the rotor observation flux, and obtaining a deviation compensation quantity by multiplying the amplitude deviation by a proportional integral operation; and compensating and correcting the first voltage-type flux calculation model based on the deviation compensation quantity to obtain a voltage-type flux calculation model with compensation correction, so that the amplitude of the rotor observation flux converges. The application converges the rotor observation flux to the rotor given flux by connecting a correction link based on the traditional voltage-type flux calculation model, and finally realizes accurate flux position observation.

An ice removal system for cables on bridges, consisting of: an adjustable ring-shaped stainless steel construction for cables of different diameters with a firm and stable hold, without slipping; at least six ball-bearing rubber wheels for smooth gliding along the cable without damaging its surface; an AC drive system with a 300 W AC motor to drive a gearbox that has a roller and all rollers are driven synchronously to ensure free movement; a fixed blade that is rigidly mounted on the machine and serves to scrape and push the ice away from the cable, when the device moves the cable upwards; and a remotely controlled system for switching on and off, raising and lowering, and torque operation to achieve the maximum ice removal flow in each case.

This invention discloses a device for driving a closing component (9) in a building using a solar power source (1). It includes at least one low-voltage AC motor (3) mechanically connected to the closing component, a DC energy storage element (2), and a solar power source supplying DC voltage. The energy storage element has a rated voltage lower than the effective voltage and greater than the DC voltage supplied by the solar power source. A DC-DC charger (4) converts the output electrical energy from the solar power source into electrical energy having a charging voltage of the energy storage element. A DC-AC converter (5) converts the electrical energy from the DC output voltage of the energy storage element into electrical energy having an AC voltage capable of powering the motor.

A speed estimation device (101, 101C, 101D, 101E) for an AC motor (2), the speed estimation device (101, 101C, 101D, 101E) comprising: a model deviation calculation unit (11) for calculating a model deviation based on a voltage, a current and an estimated angular velocity of the AC motor (2); a first angular velocity estimation unit (21) for calculating a first estimated angular velocity based on the model deviation; a second angular velocity estimation unit (22) for calculating a second estimated angular velocity based on the model deviation, the second estimated angular velocity being different from the first estimated angular velocity in terms of frequency; a compensation phase calculation unit (51) for calculating a compensation phase based on a disturbance frequency; and an estimated angular velocity calculator (23) for calculating an estimated angular velocity of the AC motor (2) on the basis of the first and second estimated angular velocities, wherein an angular velocity estimated from the first and second is calculated on the basis of the compensation phase.

This polyphase AC motor comprises a plurality of first partial windings that are wound around a plurality of respective teeth and a plurality of second partial windings that are wound around the plurality of respective teeth, and is configured to be capable of switching between a first connection state in which the first circuits of respective phases, which include the first partial windings, are connected to each other and a second connection state in which the second circuits of respective phases, which include series-connection circuits of the first partial windings and the second partial windings, are connected to each other.

A drive device (4) that drives an AC motor (1) by means of an inverter (11) includes a current detection unit (12) that detects the current flowing through the AC motor, a rotor position calculation unit (14) that calculates rotor position information which is information on the position of the rotor of the AC motor, a voltage command determination unit (15) that determines a voltage command based on the current vector of the current and the rotor position information, and a beatless control unit (18) that suppresses the pulsation of the current caused by the periodic pulsation of the DC bus voltage by operating the voltage phase of the voltage command. The beatless control unit has a norm calculation unit that calculates the norm of the current vector, a pulsation extraction unit that extracts the pulsating component of the norm, and an automatic search unit that searches for the operation amount of the voltage phase at which the pulsating component is minimized. The beatless control unit operates the voltage phase using the operation amount.

The invention provides a motor control device which randomly selects a plurality of carrier frequency candidates to disperse harmonic components, suppresses the heat generation of switching elements of an inverter, and expands the dispersion of the harmonic components to suppress electromagnetic noise. A motor control device for controlling an inverter that supplies AC power to an AC motor, the motor control device being characterized by being provided with: a carrier frequency generation unit that selects each of a plurality of carrier frequency candidates at a predetermined ratio on the basis of a random number and outputs the selected carrier frequency candidates as a carrier frequency; a carrier generation unit for generating a carrier on the basis of the selected carrier frequency; and a PWM controller that outputs a PWM signal based on the carrier to an inverter, the predetermined ratio being determined based on frequencies of the plurality of carrier frequency candidates and a predetermined maximum average switching frequency.

A drive device (4) for driving an AC motor (1) by an inverter (11) comprises: a current detection unit (12) for detecting a current flowing through an AC motor; a rotor position calculation unit (14) for calculating rotor position information that represents the position of a rotor included in the AC motor; a voltage command determination unit (15) for determining a voltage command on the basis of the current vector of the current and the rotor position information; a beat-less control unit (18) for suppressing the pulsation of a current caused by the periodic pulsation of a DC bus voltage by operating the voltage phase of the voltage command; and a resonance detection unit (20) for detecting the inductor-capacitor resonance between the inverter and an AC power supply (5) for supplying power to the inverter. The beat-less control unit reduces the operation amount of the voltage phase when the inductor-capacitor resonance is excited.

The present application relates to a motorcycle AC motor, AC motor stator assembly and its preparation method, the AC motor stator assembly includes the stator main body, the stator main body outer wall is provided with a plurality of winding teeth, and winding slot is arranged between the adjacent two winding teeth;The winding tooth includes a charging ignition coil winding tooth and a plurality of charging lighting coil winding tooth;The top of each winding tooth is provided with an arc-shaped pole shoe, and the two side edges of the pole shoe are provided with arc-shaped baffles;The outer wall of the stator main body, the outer wall of the winding tooth, the inner side wall of the pole shoe and the inner side wall of the baffle are all covered with an insulating layer, and the insulating layer is fixedly provided with a charging ignition coil lead-out head and a charging lighting coil clamping piece clamping groove.The present application only sets up a charging ignition coil winding tooth, and only needs to set up a charging ignition coil when manufacturing, so that the winding workload is reduced, and the production efficiency is improved.

Exemplary embodiments are disclosed of variable frequency drive (VFD) controllers with engine fail-over and systems including the same. In exemplary embodiments, a system includes a controller configured to be operable for controlling a VFD that drives a motor (e.g., a three-phase AC motor, etc.), which, in turn, drives (e.g., mechanically spins, etc.) a first pump. The same controller is also configured to be operable for controlling an engine (e.g., a diesel engine, etc.), which, in turn, drives (e.g., mechanically spins, etc.) a second pump. The system is configured to failover from the motor to the engine in response to a VFD communications failure.

The invention provides a single-phase alternating-current permanent magnet brushless motor which is different from a common single-phase alternating-current motor, a motor stator of the single-phase alternating-current permanent magnet brushless motor is formed by stacking silicon steel sheets with barrel-shaped interiors and armature slots and armature teeth for winding, and a cylindrical rotor is provided with permanent magnets with magnetic lines perpendicular to a motor rotating shaft in the radial direction. Magnetic lines generated by the stator and the rotor are perpendicular to a motor shaft, stator coils are concentrically wound in a distributed mode, the stator coils can be directly used on a single-phase alternating current power supply without a driver, and the speed can be adjusted through a frequency converter. Compared with a traditional single-phase alternating current motor, the motor power and torque are improved under the condition of the same specification, all south and north poles of the magnetic rotor containing the permanent magnets are driven during driving each time, and high electric energy driving efficiency and high power density are achieved. And energy conservation and emission reduction are achieved in daily industrial power application, and wide application prospects are achieved.

An aircraft adaptive battery charging system is provided. The adaptive battery charging system comprises: a battery system; a bidirectional converter, wherein the bidirectional converter is capable of an inverter mode and a rectifier mode; an alternating current (AC) motor; a number of controllable contactors that control electrical current between the battery system, bidirectional converter, AC motor, and a power source wherein the controllable contactors can be switched between a closed position to allow electrical current flow and an open position to prevent electrical current flow; a motor controller; a battery charging system controller configured to send control signals to the battery system, motor controller, and controllable contactors in response to system command signals; and a vehicle system controller that sends system command signals to the motor controller and battery charging system controller.