872results about "Multiple ac dynamo-electric motors control" patented technology

Techniques for controlling a vehicle based on a collision avoidance algorithm are discussed herein. The vehicle receives sensor data and can determine that the sensor data represents an object in an environment through which the vehicle is travelling. A computing device associated with the vehicle determines a collision probability between the vehicle and the object at predicted locations of the vehicle and object at a first time. Updated locations of the vehicle and object can be determined, and a second collision probability can be determined. The vehicle is controlled based at least in part on the collision probabilities.

The invention provides an electric engine, a control method, a related device, a motor controller and an aircraft, and relates to the technical field of aircrafts. The electric engine comprises a power motor, a heat dissipation system and a control module, a cavity is formed in the power motor, the control module is integrated in the cavity, the space occupied by the electric engine is reduced, and therefore the size of the aircraft is reduced; the control module comprises at least three integrated driving modules, part of the driving modules are electrically connected with the power motor so as to control the power motor, part of the driving modules are electrically connected with a variable pitch motor of the propeller so as to control the variable pitch motor, and part of the driving modules are electrically connected with a heat dissipation motor in the heat dissipation system so as to control the heat dissipation motor. The performance and efficiency of the electric engine are improved through unified integrated control over the power motor, the heat dissipation motor and the variable pitch motor. And through a unified control architecture, the system design is simplified, the development and maintenance cost is reduced, and the maintainability of the electric engine is improved.

The invention belongs to the technical field of equipment energy-saving control, and particularly discloses and provides an energy-saving control system based on a direct-current bus system, which comprises a direct-current bus framework module, an equipment state acquisition module, an equipment state analysis module and an energy flow control module. According to the method, the direct current bus voltage and the multi-dimensional operation data of the equipment motor are collected in real time, the motor power state space model is constructed by means of the Kalman filter, and the power sudden change probability of the future preset time period is accurately predicted. And meanwhile, an energy distribution strategy is dynamically adjusted in combination with the total power demand generated by the production schedule and according to the braking type and the power sudden change probability. The defect that dynamic power difference cannot be tracked through fixed threshold value feed-forward compensation in the prior art is effectively overcome, so that bus energy deposition is avoided, braking energy is distributed according to needs, meanwhile, it can be ensured that the braking energy can be recycled timely and correctly, and energy waste caused by misjudgment is reduced.

The invention provides an electric engine, a control method, a related device, a motor controller and an aircraft, and relates to the technical field of aircrafts. The electric engine comprises a power motor, a heat dissipation system and a control module, a cavity is formed in the power motor, the control module is integrated in the cavity, the space occupied by the electric engine is reduced, and therefore the size of the aircraft is reduced; the control module comprises a plurality of integrated driving modules, part of the driving modules are electrically connected with the power motor so as to control the power motor, and part of the driving modules are electrically connected with a heat dissipation motor in the heat dissipation system so as to control the heat dissipation motor. The performance and efficiency of the electric engine are improved through unified integrated control over the power motor and the heat dissipation motor. And through a unified control architecture, the system design is simplified, the development and maintenance cost is reduced, and the maintainability of the electric engine is improved.

A vibration test device includes a vibrating table on which an object to be vibrated is to be attached, an electric actuator that vibrates the vibrating table in a predetermined direction, and a controller that controls the electric actuator. The electric actuator includes an electric motor of which rotation can be switched between forward and reverse rotations, and a drive device that is supplied with electric power from a power source and controlled by the controller to supply driving electric power for vibrating the vibrating table at desired amplitude and frequency to the electric motor. The drive device includes a power regenerative converter that regenerates electric power that is not consumed by acceleration of the electric motor, among electric power regenerated from the electric motor when the vibrating table is vibrated at the desired amplitude and frequency, to the power source.

A motor driving apparatus includes: a power storage device; a motor; a first inverter; a second inverter; an external AC terminal; a third inverter including a DC terminal and an AC terminal; a transformer connected to the AC terminal of the third inverter; a first switch capable of switching the AC terminal of the first inverter to a state of being connected to either the first winding connection portion or the external AC terminal; a second switch capable of switching the AC terminal of the second inverter to a state of being connected to either the second winding connection portion or the transformer; and a third switch capable of switching the power storage device to a state of being connected to either the DC terminal of the first inverter and the DC terminal of the second inverter or the DC terminal of the third inverter.

The invention provides a redundancy control method and system under a dual three-phase motor current sensor fault, and belongs to the technical field of three-phase motor control, actual current is estimated based on a current observer, and the current observer obtains an estimated value of phase current through inverse transformation based on a current instruction value of vector control; and comparing the current value estimated by the current observer with an actual sampling value, diagnosing the fault of the current sensor through a set error threshold value, and realizing redundancy control according to a diagnosis result. According to the invention, additional hardware does not need to be added, or the installation position of a conventional current sensor does not need to be changed, for example, the current sensor is additionally arranged on a direct-current bus; the torque output capability can still be realized under the condition that a plurality of current sensors fail at the same time. A basic control scheme does not need to be switched, and control is realized based on vector control under vector space decoupling transformation; when current information is estimated, motor parameters do not need to be used, and the method has high parameter robustness.

An electric actuator includes an electric motor, a drive device that drives the electric motor to output a first rotary motion using power accumulated in a capacitor, and a motion converter that is coupled to the electric motor and converts the first rotary motion into a second rotary motion. The first rotary motion is forward and reverse rotary motions that are output by the electric motor as the drive device drives the electric motor to repeat forward rotation and reverse rotation. The second rotary motion is a unidirectional rotary motion. Regenerative electric power generated in the electric motor by the electric motor repeating the forward rotation and the reverse rotation is supplied to the capacitor.

The invention relates to the technical field of electronics, and discloses a boost circuit control method and device, computer equipment and a storage medium, and the method comprises the steps: detecting a state change event in a boost circuit; calculating a voltage difference value between the front-end voltage value and the rear-end voltage value in the booster circuit, and determining a corresponding target control strategy based on the state change event and the voltage difference value, the target control strategy at least comprises a step of determining a corresponding target voltage value and a feed-forward current value based on vehicle driving parameters and working condition parameters of a load motor so as to execute voltage regulation, or a step of determining a corresponding feed-forward duty ratio based on a rear end voltage value of a booster circuit so as to execute voltage regulation; and executing corresponding control operation on the booster circuit according to the target control strategy. The problems that in the prior art, due to the fact that a control strategy of a booster circuit is fixed, and a state change event and voltage difference value dynamic adjustment are not combined, voltage adjustment response lags behind, and stability is insufficient are solved.

The invention discloses a coaxial double-switch reluctance motor torque ripple minimization control method, which comprises the following steps: establishing a unified model for two switch reluctance motors, obtaining a reference torque through a proportional integral controller after making a difference between a reference rotating speed and an actual rotating speed, and establishing a phase current prediction model according to a phase voltage equation of the switch reluctance motors, based on the predicted current and the predicted angle, establishing a torque prediction model in a positive voltage excitation and zero voltage follow current mode in the conduction interval of each phase winding, and establishing a torque prediction model in a negative voltage demagnetization mode in the turn-off interval of each phase winding to obtain predicted torques of each phase winding in the conduction interval and the turn-off interval; and establishing a unified evaluation function by using the predicted torque and the reference torque of each phase winding of the two switched reluctance motors, and selecting an optimal switching state which enables the evaluation function to be minimum, thereby realizing the torque pulsation minimization control of the coaxial double-switched reluctance motor. The torque ripple minimization control method of the coaxial double-switch reluctance motor is not influenced by the phase difference of the double motors and the conduction range of each phase winding, can be easily expanded to a double-switch reluctance motor driving system with any phase number, and has good application prospect and engineering value.

A system including a engine having a low spool and a high spool, a first hybrid electric motor connected to the low spool and a second hybrid electric motor connected to the high spool. An auto-throttle controls an amount of power provided to the engine responsive to at least one aircraft parameter. A power splitting algorithm implemented between the auto-throttle and at least one of the first and second hybrid electric motors determines a power split dividing the total engine power into the power produced by burning fuel and electrical power provided to the at least one of the first and second hybrid electric motors responsive to control signals from the auto-throttle.

The transport system includes transport modules each including a coil group and an inverter unit that applies an AC voltage to the coil group. The transport system has at least one carriage having a magnet installed thereon to receive an electromagnetic force from the coil group. Each inverter unit includes an inverter circuit and a diode. The inverter circuit has a DC voltage applied thereto, the DC voltage being output from a DC power supply, and converts the DC voltage into the AC voltage. The diode is connected between the DC power supply and the inverter circuit and disposed to allow a current to flow in a forward direction from a first side of the diode connected to the DC power supply to a second side of the diode opposite to the first side when a potential on the first side is higher than a potential on the second side.

A method of operating a power inverter for an electric machine includes selecting an inverter switching technique; determining a frequency range of an inverter switch; determining a direct current (DC) voltage range of the inverter switch; determining an optimal switching map including inverter switching techniques and frequency selections for each value of torque-rate on the torque-rate curve; and controlling switches included in the power inverter using the optimal switching map.

The invention provides a dual-neutral-point series power supply dual-motor control system. The dual-neutral-point series power supply dual-motor control system comprises a boost controller, a boost distributor, a first driving controller, a second driving controller, a first modulator and a second modulator, the boost controller outputs an equivalent duty ratio by tracking a target DC bus voltage; the boost distributor uses a preset distribution strategy to distribute the equivalent duty ratio as the average duty ratio of the first permanent magnet synchronous motor and the second permanent magnet synchronous motor; the two driving controllers respectively generate driving control quantities of the first permanent magnet synchronous motor and the second permanent magnet synchronous motor; the two modulators respectively generate actual control signals of the two permanent magnet synchronous motors and carry out closed-loop control on inverters of the two permanent magnet synchronous motors. According to the dual-motor control system provided by the invention, linkage closed-loop control can be carried out on the two permanent magnet synchronous motors of which the double neutral points are connected in series for power supply.

The invention belongs to the technical field of motor control, and relates to a four-motor fault-tolerant working topological structure and method. The topological structure comprises twelve phases of bridge arms which are respectively connected with motors I to IV, and each motor is provided with A, B and C three-phase windings. The structure also comprises four bidirectional thyristors which are connected with the C-phase bridge arms of the four motors. During working, the duty ratio of the C-phase bridge arm is taken as a reference, the optimal duty ratio of the motor with the open-circuit fault is calculated, and fault-tolerant control is carried out on the four three-phase star-connected winding permanent magnet synchronous motors. The method not only can prolong the service life of the system, but also considers fault-tolerant control of a large number of motors, effectively improves the reliability of the motor group control system, and has important application value in the field of motor control.

A power converter includes a control circuit executing feedback control of a first inverter based on a detected value of a first sensor adapted to a first rotating electrical machine. The first sensor detects a current of a first busbar adapted to the first rotating electrical machine. The first busbar connects the first inverter and the first rotating electrical machine. A second busbar adapted to a second rotating electrical machine connects a second inverter and the second rotating electrical machine. The second busbar is arranged to be apart from the first sensor interposed with a converter busbar between the second busbar and the first sensor. A current of the converter flows through the converter busbar.

The invention discloses a safe and energy-saving power utilization system of an air compression station driven by an air floating shaft, and relates to the technical field of air compression stations, operating parameters of all equipment in the air compression station are monitored in real time through a data acquisition module, the operating state of an air compressor can be adjusted through a variable frequency driving module according to the real-time air utilization requirement, unnecessary energy consumption is avoided, and the power utilization efficiency of the air compression station is improved. The pressure of a pipe network is monitored through a pressure sensor, the output air pressure of an air compressor is controlled within the optimal range, and energy waste caused by too high pressure is avoided; waste heat generated in the operation process of the air compressor is recycled through the energy recycling module, and the energy requirements of other links are reduced; when the multiple air compressors operate through the linkage control module, the system automatically distributes loads, it is ensured that each device operates in an efficient interval, and the loads are balanced; a protection mechanism is automatically triggered through the safety protection module under an abnormal condition, so that the safety of equipment and personnel is effectively ensured; and the control strategy of the control center ensures that the air compression station equipment is always kept stable in the operation process.

The utility model discloses an elevator battery energy storage power supply device, comprising: a charger, an elevator drive unit, a battery stack, a variable structure switch, and an overcurrent protection unit. The elevator battery energy storage power supply device can charge the battery energy storage power supply device when the city power grid is at a valley electricity price, and use the battery energy storage power supply device to provide energy to the elevator when the city power grid is at a peak electricity price. The elevator battery energy storage power supply device can also store the electricity generated by the elevator traction machine in the power generation state into the battery energy storage power supply device, and can also store low-priced electricity in the battery stack during the valley period of the power grid.

A brushless electrical machine includes: a frame; an electric machine stator connected to the frame and having a phase coil disposed in an atmospheric volume holding an atmospheric environment; an electric machine rotor cooperatively coupled to the electric machine stator so as to generate an output under stimulation from the electric machine stator, the electric machine rotor being disposed in a sealed environment sealed from and different than the atmospheric volume; and a seal that seals the electric machine rotor from the electric machine stator. The electric machine rotor and electric machine stator are disposed in an axial gap arrangement with an axial gap between the electric machine rotor and electric machine stator disposed astride the electric machine stator, and the seal is arranged in the axial gap so as to seal each electric machine stator from each electric machine rotor stimulated by the electric machine stator across the seal.

The invention discloses a dual-motor driving system, a control method thereof and a computer storage medium. The control method of the dual-motor driving system comprises the steps that electrical parameters of a first motor and a second motor in the dual-motor driving system are collected; judging on-load states of the first motor and the second motor according to the electrical parameters; and obtaining a preset calculation model corresponding to the on-load state, and calculating a control signal used for controlling the operation states of the first motor and the second motor according to the preset calculation model. Compared with the prior art, the two motors can be controlled through one driving module, the number of the driving modules can be reduced, the circuit integration complexity is optimized, and the design size and design cost of a mainboard are reduced.

The present invention discloses a motor stator winding reuse and battery heating control method, wherein the motor stator three-phase winding is used in parallel to form a motor stator winding combined inductance, which is combined with an inverter and a battery pack to form a battery internal heating system, so that the B1 battery pack and the B2 battery pack are mutually charged and discharged through the motor winding combined inductance, generating Joule heat to internally heat the battery pack; the present invention is suitable for internal preheating of lithium batteries at low temperatures, making full use of existing hardware resources of electric vehicles, and controlling the on and off of two sets of inverter full-control devices to generate self-heating current inside the lithium battery, and generating heat by mutual charging and discharging between batteries, thereby improving the thermoelectric conversion efficiency. The present invention is suitable for electric vehicles with multiple motors, and can meet the different needs of dual motors, multiple motor windings, and open winding motors.

The invention provides a novel energy-saving power distribution control method for a wire drawing machine, belongs to the field of auxiliary power distribution of the wire drawing machine, and solves the problems of unstable power utilization, high energy consumption and the like during processing of an existing wire drawing machine. Comprising the following steps: energy-saving design of wire drawing machines: cascade energy-saving design of a plurality of wire drawing machine production lines and modular energy-saving design of the wire drawing machines; configuring the energy storage capacity of the wire drawing machine; the energy efficiency control unit monitors and analyzes working data of the energy storage battery; and energy efficiency economic control and safety protection are carried out at the same time. The energy storage capacity configuration of the wire drawing machine can be provided according to the electrical characteristics of the wire drawing machine, energy efficiency economic control and safety protection are carried out, economic charging and discharging logic is ensured on the premise of safety, and the characteristics of stable and reliable power utilization, green energy recovery and lowest power utilization cost are ensured under the condition of normal production of the wire drawing machine; and the energy efficiency control unit controls the energy storage battery to discharge to the alternating current bus to supply power to other loads except the wire drawing machine, so that the interest arbitrage function is realized.

This application provides a motor controller for an electric vehicle. The motor controller includes a control circuit and an inverter circuit. The control circuit is configured to: in response to that the drive motor rotates with a pair of wheels of the electric vehicle, control a switch module to connect a center tap of the multiphase winding to the other end of the power battery, and control the inverter circuit to adjust a voltage at both ends of the bus capacitor. The bridge arms of the inverter circuit of the motor controller provided in this application and the winding of the drive motor form a voltage conversion circuit to adjust the voltage at both ends of the bus capacitor, to improve power performance and vehicle endurance of the electric vehicle.

A variety of methods, controllers, and electric machine systems are described that facilitate pulsed control of multiple electric machines (e.g., electric motors and generators) to improve the machine's energy conversion efficiency. Under selected operating conditions, the electric machine is intermittently driven (pulsed). The pulsed operation causes the output of the electric machine to alternate between a first output level and a second output level that is lower than the first output level. The output levels are selected such that at least one of the electric machines and a system that includes the electric machine has a higher energy conversion efficiency during the pulsed operation than the electric machine would have when operated at a third output level that would be required to drive the electric machine in a continuous manner to deliver the desired output. In some embodiments, the second output level is zero torque.

A method of determining rotor angle limits for static heating of an electric motor comprises: applying a brake to a wheel of a vehicle, wherein the vehicle has an electric motor; while the brake is applied, providing a first current to the electric motor to generate first torque not exceeding a brake torque limit of the brake; while the brake is applied, providing a second current to the electric motor to generate second torque, the second current being opposite, and about equal, to the first current; determining a first rotor rotation angle associated with the first current, and a second rotor rotation angle associated with the second current; and setting the first and second rotor rotation angles as first and second rotor angle limits, respectively, for static heating of the electric motor.

The invention provides a motor controller for realizing fault isolation, a distributed power assembly and a vehicle. The motor controller comprises a three-phase bridge arm, a direct current breaker, an alternating current breaker and a control device. Wherein the two ends of the three-phase bridge arm are used for being connected with a power battery through a direct-current bus, and the middle point of each phase of bridge arm in the three-phase bridge arm is used for being connected with a phase winding of the driving motor. The control devices are used for connecting the direct-current driving module and the alternating-current driving module through internal lines, and one control device is used for controlling the direct-current driving module to drive the direct-current breaking module to connect or disconnect the connection between the three-phase bridge arm and the direct-current bus; and the control module is used for controlling the alternating current driving module to drive the alternating current breaking module to connect or disconnect the bridge arm midpoints of the at least two phases of bridge arms and the at least two phases of windings, so that faults of the power assembly can be isolated, normal operation of other electric parts of the electric vehicle is guaranteed, and the safety throwing rate of the vehicle is reduced.

The present invention discloses a motor drive system, comprising a three-phase AC motor and a controller group for controlling the three-phase AC motor, wherein the stator of the three-phase AC motor adopts two or more winding units; the controller group comprises motor driver units electrically connected to each of the winding units respectively, and each of the motor driver units is used to perform operation control on the winding unit corresponding thereto; wherein the controller group centrally coordinates and manages the operation status of each of the motor driver units; the present invention adopts a controller group to centrally coordinate and manage the operation status of each of the motor driver units, and the centralized coordination and management control is achieved by communicating and summarizing the operation status of each of the motor driver units, and then the controller group determines and executes control instructions according to the operation status summary information, so as to meet the control requirements of the motor drive system.

An electric drive system (1A-1D) comprises an electric motor (10; 10A, 10B) having a rotor (100) and a plurality of lanes (101A-101D) which are electrically isolated from one another and to which electric current can be applied independently of one another in order to drive the rotor (100); a respective supply unit (11) for each of the lanes (101A-101D); and a control system (12) which is designed to simultaneously operate at least one of the lanes (101A-101D) in a motor mode in which electric current is applied to the lane (101A-101D) via the corresponding supply unit (11) in order to convert electrical energy into kinetic energy of the rotor (100) and operate at least one of the lanes (101A-101D) in a generator mode in which electric current is provided by means of the lane (101A-101D) via the corresponding supply unit (11).

The invention particularly relates to a high-voltage frequency converter which comprises a working frequency converter, a standby frequency converter, a protection relay, a current transformer and a voltage transformer. A breaker is arranged on an inlet wire of the working frequency converter, a breaker is arranged on an outlet wire of the working frequency converter, the breaker of the outlet wire of the working frequency converter is connected with a protection relay, the protection relay is connected with a current transformer and a voltage transformer, and the voltage transformer is connected with the standby frequency converter. The standby frequency converter inlet wire is provided with a circuit breaker, and the standby frequency converter outlet wire is provided with a circuit breaker. An outgoing line of the working frequency converter is connected with an outgoing line of the standby frequency converter and a motor incoming line, the motor incoming line is connected with a first motor incoming line breaker and a second motor incoming line breaker in series, and a switching breaker is arranged on a line where the outgoing line of the working frequency converter is connected with the outgoing line of the standby frequency converter. Rapid switching from the working frequency converter to the standby frequency converter is achieved, and the standby frequency converter is automatically started under the working conditions that the working frequency converter breaks down and an outgoing line circuit breaker of the working frequency converter is not triggered to be opened.

A motor controller executes an axis module for each of multiple motors coupled to a shared load. A first control module passes at least one state variable to a second control module without experiencing communication delays between the axis modules. In order to decouple interaction between axes, the first control module determines the desired state variable at a periodic update rate and stores the desired state variable in memory. The first control module provides an indication to the second control module that the desired state variable is available. Within the same period at which the desired state variable is determined, the second control module receives the indication that the desired state variable is available and reads the state variable from the memory of the controller. The second control module executes using the desired state variable to reduce coupling between the two control modules.