412results about "Multiple ac dynamo-electric motors control" patented technology

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.

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 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 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 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.

Embodiments of the disclosure provide a robot cleaner for cleaning a stair. The robot cleaner includes a main body configured to rotate around a first shaft. The robot cleaner further includes at least one leg each configured to rotate around a second shaft. The robot cleaner also includes at least one connector each configured to connect each leg to the main body. Each connector comprises a first end attached to the first shaft and a second end attached to the second shaft. The robot cleaner is configured to climb the stair by first lifting the main body onto a tread of the stair through rotations of the main body and the at least one connector and then lifting the at least one leg onto the tread through rotations of the at least one connector and the at least one leg.

The invention relates a washing appliance comprising a container apt to receive articles to be washed, a first pump assembly equipped with a first three-phase electric motor (101) having three terminal leads (U1, V1, W1), a second pump assembly equipped with a second three-phase electric motor (102) having three terminal leads (U2, V2, W2), a controllable power converter (200) having three outputs (U, V, W) for providing electric power to the electric motors (101, 102) and a control device (204) to control the controllable power converter (200). There is provided a switching device (300) interposed between the controllable power converter (200) and the electric motors (101, 102), wherein the switching device (300) is configured to be disposed in a first position to operate the first electric motor (101) and a second position to operate the second electric motor (102).

This invention provides a drive control circuit, a control method, and an air conditioner. By proposing a drive control circuit comprising a drive module, an operating parameter acquisition device, a connection switching circuit, and a control module, it solves the technical problem of poor control accuracy when a single IPM module drives multiple motors. This invention achieves precise adjustment of the operating states of different motors when a single IPM module drives multiple motors, while reducing the instability of non-target motor states during switching, significantly improving the operating performance and reliability of a system where a single IPM module drives multiple motors.

When regeneration operation is being performed, electric power on a main-machine side is supplied to an auxiliary-machine side, a voltage on the auxiliary-machine side is controlled to become a first voltage value predetermined on the basis of operating voltage specifications of an auxiliary apparatus, a generator on the auxiliary-machine side is deactivated to stop supply of electric power to the auxiliary-machine side, and electric power on the auxiliary-machine side is supplied to a power storage apparatus. When the regeneration operation is ended, the supply of the electric power from the main-machine side to the auxiliary-machine side is stopped, the generator on the auxiliary-machine side is activated, the generator on the auxiliary-machine side is controlled such that a voltage on the auxiliary-machine side becomes the first voltage value, electric power of the power storage apparatus is supplied to the auxiliary-machine side, and the voltage on the auxiliary-machine side is controlled to become a second voltage value higher than the first voltage value. This enables reduction of fluctuations of a voltage supplied to auxiliary machines at a time of switching of regeneration operation by travel motors.

The disclosure relates to monitoring electrical machines for detecting faults in components. An example embodiment includes a method of monitoring first and second electrical machines (1011, 1012) driving respective first and second mechanical loads (1031, 1032), the method comprising: measuring first and second sets of currents (Ia1, Ib1, Ia2, Ib2) through a plurality of stator phases of the respective first and second electrical machines (1011, 1012); calculating first and second DC components of a sum of squares of the respective first and second measured sets of currents (Ia1, Ib1, Ia2, Ib2); calculating a first ratio of the first DC component to the second DC component; and determining a fault in a component (1021, 1022) connected to the first or second mechanical loads (1031, 1032) if the first ratio is outside of a predetermined range.

Conveyor arrangement (1), adapted to convey an object (9), the conveyor arrangement (1), comprising, - a plurality of conveyor zones (2), each conveyor zone (2) is adapted to convey an object (9) from an inlet (1) of said conveyor zone (2) to an outlet (0) of said conveyor zone (2), each conveyor zone (2) is provided with a drive unit (3M), each drive unit (3M) is adapted to transform electrical power into mechanical power required for conveying said objects (9); - a plurality of, in particular at least two, power supply devices (21) adapted to supply electric power (P21) to the drive units (3M); - in particular at least one controller (10, 11) adapted to control operation of said conveyor zones (2); the conveyor arrangement (1) further comprising a power supply network (20), comprising - the plurality of power supply devices (21); - the plurality of drive units (3M); - at least one power supply line (23) connecting the plurality of power supply devices (21) with the plurality of drive units (3M).

A multi-charge system using a variety of inverters may include a battery, a first motor, a first inverter connected to the battery and the first motor and comprising a variety of first switching elements, a second motor, a second inverter connected to the battery and the second motor and comprising a variety of second switching elements, a charge switch that selectively connects a neutral point of the first motor or a neutral point of the second motor to a charge current input stage, and a control unit configured to control the charge switch to connect to the neutral point of the first motor or the neutral point of the second motor in response to the charging of the battery with current supplied via the charge current input stage.

The invention discloses a frequency converter parallel control method and system, and relates to the technical field of frequency converter control, and a control data exchange matrix is arranged between each data input channel of a master control frequency converter and each data output channel of a slave frequency converter. Adjusting and controlling the connection state of the connection point mapped by each row and column in the data exchange matrix so as to adjust the data input channel connected with each data output channel; wherein each connection point mapped by the Nth row in the control data exchange matrix is used for connecting the Nth data input channel, and each connection point mapped by the Nth column is used for connecting the Nth data output channel; and controlling each data input channel to transmit the control data received by the data input channel to the data output channel connected with the data input channel, so that the master control frequency converter and the slave frequency converter are switched to enter a target parallel control mode. The flexibility of frequency converter parallel control can be improved.

The invention provides a motor torque control method and device, electronic equipment and a storage medium, and relates to the technical field of vehicles. The motor torque control method provided by the invention is applied to a vehicle control unit, and the motor torque control method comprises the following steps: carrying out arbitration distribution on a vehicle request torque, and determining a motor request torque; when the motor request torque is in a zero torque interval, a first tooth leaning torque is output to a motor controller and maintained for a first preset duration, after the maintaining time is over, the motor request torque is output to the motor controller, the motor controller is used for outputting a second tooth leaning torque or a compensation request torque to a motor, and the motor controller is used for outputting the second tooth leaning torque or the compensation request torque to the motor. The compensation request torque is determined by the motor request torque or the first toothing torque. According to the invention, the smoothness when the torque of the motor crosses zero is improved, the pause and abnormal sound are reduced, and the comfort and the dynamic property are both considered.

The invention provides a control system of a motor, an electrical system and a control method. The control system comprises a power circuit, a power supply circuit, a detection circuit, a control circuit and at least one motor, the at least one motor is connected with the power supply circuit through the power circuit and has a plurality of working voltages; the detection circuit is respectively connected with the power supply circuit and the control circuit, the detection circuit is used for detecting the power supply voltage of the power supply, and when the power supply voltage conforms to one of the plurality of working voltages, a signal is sent to the control circuit, so that the control circuit forms a topological structure corresponding to the conformed working voltage; the control circuit is connected with the power circuit, and the control circuit can control the wiring mode of the stator winding of the at least one motor through the power circuit based on the topological structure so as to control the operation mode of the at least one motor.

A servo system including a control device and multiple servo drivers reduces noise resulting from switching. The servo system includes a control device and multiple servo drivers. Each servo driver includes a servo signal generator, a PWM calculator that generates a PWM control signal with a pulse being modulated, and an inverter. The PWM calculator performs a first process of generating, using a predetermined parameter set based on a circuit structure including the servo driver and the corresponding motor, a superimposed signal to be superimposed on the command signal, and the superimposed signal differs for each of control axes corresponding to the respective plurality of motors when the command signal is in a low voltage range. The PWM calculator performs a second process of generating the PWM control signal by adding the superimposed signal to the command signal and by comparing a resulting signal with a predetermined carrier signal.

A brushless electric motor includes: a frame; a motor stator connected to the frame and having phase coils disposed in an atmospheric volume maintaining an atmospheric environment; a motor rotor cooperatively coupled to the motor stator to generate an output under excitation from the motor stator, the motor rotor being disposed in a sealed environment that is sealed and isolated from and different from the atmospheric volume; and a seal that seals and isolates the motor rotor from the motor stator. The motor rotor and motor stator are arranged with an axial clearance, wherein the axial clearance between the motor rotor and motor stator is disposed across the motor stator, and the seal is disposed in the axial clearance to seal and isolate each motor stator from each motor rotor excited by the motor stator across the seal.

The utility model discloses a driving protection circuit and electric equipment, the driving protection circuit comprises a rectifier bridge connected with AC input, and the output end of the rectifier bridge is connected with a first bus capacitor and a second bus capacitor in sequence; the rear stage of the first bus capacitor is connected with a first load circuit, the rear stage of the second bus capacitor is connected with a second load circuit, and a current direction limiting unit is connected in series on a direct current bus connecting the first bus capacitor and the second bus capacitor; the current direction limiting unit can adjust the second bus capacitor to conduct or cut off a power supply path of the first bus capacitor. Compared with the prior art, the current direction limiting unit is additionally arranged, so that the risk of operational reliability in the integrated control process of the three-phase fan and the three-phase compressor under the condition of no electrolytic capacitor can be solved.

The invention discloses a cutting machine power-off control method and device, a program product and a storage medium, and is applied to the technical field of fault protection. The method comprises the steps that in the operation process of a cutting machine, the speed of a virtual main shaft is configured as the main speed; for any motor participating in wire net motion control, the target speed of the motor is determined based on the main speed and the speed following proportion of the motor, and the speed of the motor is controlled based on the target speed of the motor; when it is detected that the cutting machine is powered off, the target voltage of the direct-current bus is obtained; and reducing the main speed to a preset threshold value, and in the reducing process, taking the fact that the actual voltage of the direct-current bus is equal to the target voltage as a target of feedback control, and adjusting the deceleration of the main speed. By means of the scheme, the situation that the wire net is broken when the cutting machine is powered off can be avoided.

The invention discloses a laser processing device, a driving control chip and a chip preparation method. The chip comprises a packaging chip body, and a driving detection module, a power supply control module, a control chip and a multifunctional interface which adopt the packaging chip body to carry out system-level packaging, the driving detection module is used for executing sampling signal processing and driving control of one or more paths of motors; the power supply control module is used for being connected with a power supply and transmitting at least one stage of output voltage to an electric load of the packaging chip body; the control chip is connected with at least one of the driving detection module, the power supply control module and the multifunctional interface; the multifunctional interface is at least used for transmitting communication signals and analog-to-digital signals. One or more paths of driving detection, power supply, system control and multifunctional interfaces are integrated on a single chip, discrete devices are reduced, the component layout is simplified, the integration level is higher, and the adaptability is higher.

An electric power take-off system includes a motor configured to convert electrical power received from a battery into hydraulic power, an inverter configured to provide electrical power to the motor from the battery, a heat dissipation device in thermal communication with the inverter, wherein the heat dissipation device includes a thermal fluid pump configured to pump cooling fluid through a plurality of conduits, a flow meter configured determine a flow rate through the plurality of conduits, and a controller configured to receive data from the flow meter and provide operating parameters to the heat dissipation device, wherein the controller is further configured to determine if the data from the flow meter is less than a critical operating condition and decrease the hydraulic power provided by the electric power take-off system in response to determining that the data from the flow meter is less than the critical operating condition.