766 results about "AC motor" patented technology

Embodiments include an electric vehicle having a charging port configured to receive an alternating current (AC) power, a direct current (DC) battery, and a bidirectional inverter configured to convert AC power to DC power and to convert DC power to AC power, the bidirectional inverter is selectively connected to the DC battery by propulsion switches. The electric vehicle also includes an AC motor connected to the bidirectional inverter and selectively connected to the charging port by a first charging switch, an isolated DC / DC converter motor selectively connected to the DC battery via a second charging switch and a third charging switch, and a processor configured to control the operation of the propulsion switches, the first charging switch, the second charging switch, and the third charging switch based on an operational mode of the electric vehicle.

The invention belongs to the technical field of AC motor transmission control, and relates to a permanent magnet synchronous motor dead zone compensation method based on a nonlinear flux observer. Measuring a motor induction current under a natural coordinate system, and obtaining an alpha-beta axis current through conversion; a non-linear flux observer in an alpha-beta coordinate system is used as a position observation model to obtain an actual rotor position estimation value, a rotating speed ring is formed, and sensorless control of the permanent magnet synchronous motor is achieved; constructing a q-axis voltage disturbance observer by measuring the phase voltage output by the inverter; taking the output of the q-axis disturbance observer as the input of a dead time calculation module to obtain a dead time estimation value; and according to the estimated value, calculating and obtaining a dead-zone compensation voltage, and compensating the output phase voltage of the inverter to realize dead-zone compensation. On the basis of a non-linear flux observer, a position-free control closed-loop structure is constructed, and instruction voltage is corrected, so that the influence of inverter dead time on the permanent magnet synchronous motor is reduced, and the position-free control performance is improved.

The invention discloses a motor control device and an air conditioner, and the motor control device comprises a position / rotation speed estimation unit which estimates a rotor position and a rotor rotation speed of an AC motor driven by an inverter according to a detection current (iq, id) on a control shaft and a voltage command value (Vd *, Vq *) inputted to the inverter; and a current ripple suppression controller for estimating compensation currents (iqcmp, idcmp) for compensating the current command values (iq *, id *) on the control axis from the detection currents (iq, id) on the control axis and the mechanical angle of the rotor, respectively, so as to reduce position observation errors caused by current control fluctuations. The influence of current pulsation on position observation can be suppressed, and the motor position observation accuracy is improved.

The embodiments comprise an electric vehicle having a charging port configured to receive alternating current (AC) power, a direct current (DC) battery, and a bidirectional inverter configured to convert AC power to DC power and DC power to AC power, wherein the bidirectional inverter is selectably connected to the DC battery by means of drive switches.The electric vehicle also includes an AC motor connected to the bidirectional inverter and selectably connected to the charging port via a first charging switch, a separate DC / DC converter motor selectedly connected to the DC battery via a second and third charging switch, and a processor configured to control the operation of the drive switches, the first charging switch, the second charging switch, and the third charging switch based on an operating mode of the electric vehicle.

A novel flat wire winding permanent magnet motor with unequal area belongs to the technical field of AC motor. The invention is to solve the problem that the AC loss of the flat wire motor stator winding is too high under high-frequency working conditions, and there are problems such as card jumper and easy damage to the insulating paint film during welding during the manufacturing process. It includes: the stator core includes a stator yoke and a stator tooth part, and the gap between the stator yoke and the stator tooth part constitutes a stator core slot. The first type: the stator winding includes two large-area flat wire windings and two double-strand flat wire windings, and the large-area flat wire windings and the double-strand flat wire windings are both placed in the stator core slot; the stator core slot is rectangular; the large-area flat wire windings are connected in series, and the double-strand flat wire windings are connected in parallel; the other type: the stator winding includes a plurality of trapezoidal flat wire windings, the stator core slot is trapezoidal, the slot bottom is the long side, and the trapezoidal flat wire winding is placed in the stator core slot, and the side of the trapezoidal flat wire winding close to the slot bottom of the stator core slot is the long side. The present invention is used for flat wire winding permanent magnet motors, and is particularly suitable for motors used in new energy vehicles.

The invention provides a rotating speed control method and device of an alternating current motor and the alternating current motor, and relates to the technical field of rotating speed control of the alternating current motor, and the method comprises the steps: monitoring the operation state of the motor in real time through a sensor, obtaining three-phase current, motor rotating speed and motor output torque data, carrying out the preprocessing of the data, determining the architecture of a neural network model, and obtaining a neural network model; the method is used for accurately predicting voltage adjustment amount. According to the same data, constructing a fuzzy control model, defining a fuzzy set and a membership function, formulating a fuzzy rule, combining the trained neural network with a fuzzy control system, and dynamically adjusting the fuzzy logic through the voltage adjustment amount predicted by the neural network, and combining the voltage adjustment amount output by the neural network with the torque adjustment amount output by the fuzzy controller, and calculating a final control voltage. The motor control can be optimized in real time, the output of the motor is accurately adjusted, and the stability and efficiency of motor operation are effectively improved.

An apparatus includes a power converter to convert incoming alternating current (AC) mains power into a direct current (DC) voltage. A linear AC pump of the apparatus has an arm that reciprocates linearly back and forth to move a pair of diaphragms to pressurize air that is output from the linear AC pump. The apparatus also includes a DC motor driver having an H-bridge that receives the DC voltage from the power converter as an input and that generates a square wave as an output that is coupled to the linear AC pump to drive the arm back and forth. The pressurized air from the linear AC pump is used to inflate one or more bladders of an air mattress, for example.

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.

The invention discloses a single-bearing low-rotating-speed alternating-current motor which is constructed by taking a single deep groove ball bearing as a core element, the motor makes full use of the characteristic that the deep groove ball bearing with a large outer ring diameter-thickness ratio has extremely high stability, and a bearing inner ring, a stator base, an iron core and a winding of the iron core form a stator; the number of magnetic pole pairs of the stator core is greater than or equal to 20 and is equal to that of magnetic pole pairs of the permanent magnet steel; a rotor is composed of a bearing outer ring, a rotor base and permanent magnet steel, and the single-bearing low-rotating-speed alternating-current motor with planar kinetic energy output is constructed. The single-bearing low-rotating-speed alternating-current motor has the advantages of being simple in structure, low in manufacturing cost, low in energy consumption, long in service life, convenient to use and easy to maintain, and can stably work for a long time under the conditions of light load and low rotating speed.

The invention relates to the technical field of power supply, and provides a mobile charging intelligent rail highway power supply system and a power supply method thereof, which solve the problem that the existing power supply system has a single system and is difficult to meet the requirements of high efficiency, safety and flexibility, the mobile charging intelligent rail highway power supply system comprises a high-voltage power transmission line, a charging rectification station, a contact net, a pantograph and other core components, the innovation point lies in that an intelligent power supply management unit, a multi-system compatible unit and a contact network power supply unit are introduced, so that intelligent management, multi-system compatibility and real-time monitoring of the electric energy are realized; according to the invention, the power supply mode can be adjusted according to the external power supply mode, and the efficiency and safety of system operation are improved.

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.

A power battery comprises a first cell group and a second cell group connected in series. The heating system comprises an inverter, an AC motor, a first controller, and a plurality of connection lines. The midpoints of three bridge arms of the inverter are connected to the head ends of three-phase coils of the AC motor in a one-to-one correspondence. The tail ends of the AC motor are connected together to form a neutral point. First ends of the connection lines are connected to the neutral point of the AC motor. Second ends of the connection lines are connected to a connection point between the first cell group and the second cell group. The first controller is configured to input a drive signal to the inverter. The first cell group, the second cell group, the inverter, the AC motor, and the connection lines form an AC self-heating loop.

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.

The invention relates to a motorcycle alternating current motor, an alternating current motor stator assembly and a preparation method thereof, the alternating current motor stator assembly comprises a stator main body, the outer side wall of the stator main body is provided with a plurality of winding teeth, and a winding groove is arranged between two adjacent winding teeth; the winding teeth comprise a charging ignition coil winding tooth and a plurality of charging illumination coil winding teeth; an arc-shaped pole shoe is arranged at the top of each winding tooth, and arc-shaped baffles are arranged on the two side edges of each pole shoe; the outer side wall of the stator body, the outer walls of the winding teeth, the inner side walls of the pole shoes and the inner side walls of the baffles are all covered with insulating layers, and the insulating layers are fixedly provided with charging ignition coil leading-out heads and charging lighting coil clamping piece clamping grooves. Only one charging ignition coil winding tooth is arranged, only one charging ignition coil needs to be arranged in the manufacturing process, the winding workload is reduced, and the production efficiency is improved.

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.

The utility model relates to the technical field of polyester film processing, and discloses a polyester film processing device with an insulation function, which comprises a mounting box, a mounting sleeve is fixedly mounted on the right side of the mounting box, and two alternating current motors are fixedly mounted on the front surface of the mounting sleeve. Transmission rollers are fixedly mounted at the output shaft ends of the two alternating-current motors, preformed holes are formed in the front surface of the mounting box, a plurality of supporting rollers are rotationally connected to the inner side wall of the mounting box, supporting blocks are fixedly mounted on the inner side wall of the mounting box, and fixing rods are fixedly mounted at the bottoms of the supporting blocks; and a connecting sleeve is fixedly mounted at the bottom of the fixed rod. According to the polyester film processing device with the insulation function, the thickness of the glue solution on the outer side of the polyester film can be controlled, so that the processing quality of the polyester film is guaranteed, the two surfaces of the polyester film can be processed at the same time, the production efficiency is improved, and the processing quality is improved.

The utility model discloses a high-efficiency AC electric dynamometer, which comprises a dynamometer body, the dynamometer body is composed of a three-phase asynchronous AC motor, a torque rotating speed sensor and a base, the three-phase asynchronous AC motor is installed on the upper end face of the base, and the torque rotating speed sensor is installed on an output shaft of the three-phase asynchronous AC motor. When the dynamometer is used, heat in the three-phase asynchronous alternating current motor is dissipated through the heat-conducting plate via the heat-dissipating fins, and when the dynamometer body works, the three-phase asynchronous alternating current motor in the dynamometer body drives the fan blades on the rotating shaft to rotate through the belt pulley I and the belt pulley II, so that the fan blades are driven to rotate. According to the dynamometer provided by the utility model, the air flow generated when the fan blades work blows among the heat dissipation fins, the heat dissipation effect of the heat dissipation fins can be accelerated through blowing of the air flow, dust among the heat dissipation fins can be cleaned, and the efficiency of the dynamometer is improved while the heat dissipation effect of the three-phase asynchronous AC motor in the dynamometer body is improved.

The utility model relates to the technical field of cigarette packaging production, and discloses an automatic sealing label feeding device of a packaging machine, which comprises a rear base frame. According to the automatic sealing label feeding device of the packaging machine, a first alternating current motor works to drive a cigarette outlet wrapping belt to move, so that the effect of driving the cigarette outlet wrapping belt to convey non-sealing cigarette packets is achieved, then the cigarette packets reach the position of a long-stroke mold box, then a sealing label stained with glue is adsorbed to the top of an angle electric suction claw through a supply rod, and the sealing label is automatically fed into the packaging machine. Then an angle motor is started to drive an angle electric suction claw to adhere a seal to the top of a non-seal cigarette packet, then the angle electric suction claw is made to return to the original position, and then the cigarette packet in the long-stroke mold box is pushed into the short-stroke mold box, so that the function of automatically feeding the seal to the cigarette packet is achieved; the problem that in the using process of an existing packaging machine, due to the fact that a GDX original machine does not have the procedure design of re-supplementing the sealing labels for the cigarette packets without the sealing labels can be solved.

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 utility model discloses a winch which comprises a bearing module, a driving module, a transmission module and a winding drum module, the driving module, a gear speed changing module and the winding drum module are arranged on the bearing module, the bearing module comprises a winch frame, and the driving module comprises an alternating current motor. The gear speed changing module comprises a gear speed changing box, an input shaft and an output shaft, the winding drum module comprises a roller, a roller shaft and a hydraulic disc brake device, an alternating-current motor is arranged at one corner of the end face of the winch frame, a driving shaft is arranged on the alternating-current motor, and the driving shaft is connected with the input shaft through a gear coupling. The input shaft is connected with the output shaft, one end of the output shaft is connected with one end of the roller shaft, a roller is arranged in the middle of the roller shaft, and a hydraulic disc brake device is arranged at the other end of the roller shaft. According to the utility model, the reliability of the winch is improved by adopting the combined type of the dynamic braking of the motor and the hydraulic disc type braking.

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.