641results about "Multiple ac dynamo-electric motors control" patented technology

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.

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.

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.

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 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.

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.

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).

A vacuum pump system (300), comprising at least one vacuum pump (330, 360) each comprising: a rotor (331, 361); a motor (332, 362) configured to drive the rotor (331, 361); and a converter (333, 363) configured to supply electrical power to the motor (332, 362) to accelerate and decelerate the rotor (331, 361). Each converter (333, 363) is further configured to: operate the motor 10 (332, 362) in a generator or braking mode for a deceleration of the rotor (331, 361); and capture as a regenerated energy at least a portion of the kinetic energy of the rotor (312, 361) during the deceleration.

The invention relates to an underground logistics transportation driving system and a driving method thereof. The system comprises a track, a mover trolley moving along the upper surface of the track and a controller. The track is composed of a plurality of stators which are linearly arranged in sequence, and gaps are formed among the stators; the stator comprises a stator track, a track groove, a stator coil, a Hall plate and a plurality of optical fiber sensors; the stator coil is arranged in the track groove along the length direction of the stator track, the Hall plate is located at one side of the stator coil and is arranged in the track groove along the length direction of the stator track, and the plurality of optical fiber sensors are distributed in the track groove along the length direction of the stator track; the plurality of optical fiber sensors are electrically connected with the controller, the plurality of Hall sensors are electrically connected with the controller, and the stator coil is electrically connected with the controller; according to the system, the cost can be reduced, the transportation length is not limited, and the multiple transportation trolleys can be controlled to operate synchronously and asynchronously.

The utility model belongs to the technical field of controllers, and provides a dual-motor controller, which comprises a box body, a magnetic ring fixing seat, an inverter brick and a PDU assembly. Wherein the magnetic ring fixing seat and the inversion brick are installed in the box body and located on one side of the inversion brick, and the PDU assembly is installed at the bottom of the box body. According to the utility model, the heat dissipation grooves are arranged on the upper and lower surfaces of the water cooling plate, and the two groups of IGBT modules are arranged on the corresponding heat dissipation grooves and share one water cooling plate, so that the length of a flow channel is shortened, and the size of the controller is reduced; according to the utility model, the first IGBT module and the second IGBT module can share one thin-film capacitor, so that the material cost and the size of the controller are greatly reduced; according to the utility model, the PDU is independently assembled in the shell to form the PDU component, and the PDU component can be integrally assembled on the dual-motor controller or not integrally assembled according to different requirements of boosting functions of products, so that the flexible compatibility of the products is realized, and the universal adaptability of the products is improved.

A control device for a vehicle includes a plurality of control circuits configured to control a control object by starting in response to powering-on of a vehicle and to perform power latch control for continuing to be supplied with electric power in a predetermined period in response to powering-off of the vehicle. Each of the control circuits is configured to perform starting after all of the control circuits have recognized the powering-on of the vehicle in a case where the vehicle is powered on while the power latch control is being performed after the vehicle has been powered off.

The invention relates to a control system (14) and a method for controlling an operation of motor-driven units of an MDU system (15), the latter comprising a first motor-driven unit (151) comprising a first motor (152) and a second motor-driven unit (153) comprising a second motor (154), said control system (14) comprising: - a variable frequency drive - hereafter VFD - (141) configured for outputting an electrical signal E1 configured for powering one motor among said first and second motors (152, 154), wherein a frequency of said electrical signal E1 is configured for varying in function of a control signal CD received by the VFD (141); - a powering switch (142) comprising two states, namely an ON state and an OFF state, wherein in the ON state, the powering switch (142) is configured for outputting an electrical signal E2 configured for powering the other motor among said first and second motors (152, 154), and in the OFF state, the powering switch (142) is configured for switching off said FS motor; characterized in that it further comprises - a swapping component (143) configured for switching the powering of the first motor (152) from the electrical signal E1 to the electrical signal E2 and of the second motor (154) from the electrical signal E2 to the electrical signal E1, and vice versa.

A hydraulic system for a vehicle is provided. The hydraulic system includes a first electric motor, a second electric motor, a gearbox arranged to be driven by the first and second electric motors, a hydraulic pump arranged to be driven by the gearbox, and a control arrangement configured to individually control the first and second electric motors to either run at a reference speed or to deliver a reference torque and during operation control at least one of the first and second electric motors to deliver a reference torque.

To provide a power supply system, an aircraft, and a power supply system control method that makes the remaining capacity of each battery approximately equal.SOLUTION: A power supply system 26 includes a power converter 36 that converts the power of any one of a plurality of batteries included in a high voltage circuit 32 and supplies it to one or more second loads 38, a switch 34 capable of selectively connecting any one of the plurality of batteries to the power converter, and a controller 70 that compares the remaining capacities SOC of the batteries, and controls the switch so as to connect a battery with the highest remaining capacity and the power converter when the difference between the highest remaining capacity and the lowest remaining capacity is greater than a predetermined threshold.SELECTED DRAWING: Figure 3

The invention provides a power module. The power module comprises a power generation power module. The power generation power module comprises at least two first bridge arms. The at least two first bridge arms are arranged on the same first lining plate, and the at least two first bridge arms share the first collector terminal. The first collector terminal is for connection with a collector of the upper bridge circuit. According to the power generation power module, the at least two first bridge arms share the first lining plate, and meanwhile, the at least two first bridge arms share the first collector terminal, so that the lining plate area required by the power generation power module is reduced.

An electric drive unit (1A, 1B) for an aircraft (2) comprises an electric machine (10A, 10B) with at least one stator (100A, 100B) and at least one rotor (101A, 101B) rotatable relative to it about an axis of rotation (D), wherein the electric machine (10A, 10B) has several sub-machines (M1-M4) each with an electrical winding system (W1-W4), wherein the winding systems (W1-W4) can be energized independently of each other to set the at least one rotor (101A, 101B) into rotation about the axis of rotation (D), wherein the power of an energization of the winding systems (W1-W4) can be adjusted differently from each other.

The invention discloses a multi-motor system for an electric appliance and a control method, and belongs to the field of motors. The device comprises a controller, an IPM, a switch device and a plurality of motors. The plurality of motors are connected to the same IPM through the switch equipment; and the controller is connected with the IPM and is used for judging the number and the rotating speed of the motors needing to be operated according to the load state and issuing a control instruction to the switch equipment and the IPM. The method comprises the following steps: dividing a load state into a plurality of modes, and setting the number and rotating speed of motors needing to operate in different modes; and the controller issues a corresponding operation mode according to the load state, issues a control instruction of the number of motors needing to operate in the corresponding mode to the switch equipment, switches the multiple motors, issues a rotating speed control instruction of the motors needing to operate in the corresponding mode to the IPM, and controls the rotating speed of the motors put into operation. The hardware cost of air conditioner control is saved, and the flexibility and reliability of the air conditioner system for controlling multiple motors are improved.

A vacuum pump system (300), comprising at least one vacuum pump (330, 360) comprising: a rotor (331, 361); a motor (332, 362) configured to drive the rotor (331, 361 ); and a converter (333, 363) configured to supply electrical power to the motor (332, 362) to accelerate and decelerate the rotor (331, 361). The converter (333, 363) is further configured to: operate the motor (332, 362) in a generator or braking mode for a deceleration of the rotor (331, 361 ); and capture as a regenerated energy at least a portion of the kinetic energy of the rotor (312, 361) during the deceleration.

A power conversion device is provided with: a plurality of electronic units that form a power conversion circuit that boosts power supplied from a high-voltage battery and outputs the boosted power to a motor; a central plate having a flat-plate-shaped partition wall portion for supporting the plurality of electronic units; a motor output connector connected to the motor; a pre-boost electronic unit, which is an electronic unit for processing power before boost, is disposed above the partition wall portion, and a motor output connector and a post-boost electronic unit, which is an electronic unit for processing power after boost, are disposed below the partition wall portion.