52results about "Motor control for low load efficiency" patented technology

Technology for managing a distributed control system for a motor control switch is described. A request to implement a first controller for a motor control switch is received. An embodiment determines a plurality of function modules of the first controller. Each of the plurality of function modules includes an instance of computer logic configured to perform a corresponding function. A corresponding motor control function set (MCFS) for performing the corresponding function of each of the plurality of function modules is determined. One or more of a plurality of configurable hardware blocks are assigned to each of the plurality of function modules. An embodiment configures each of the plurality of configurable hardware blocks based on the MCFS of the function module to which the corresponding configurable hardware block is assigned. The configured plurality of configurable hardware blocks operate as a distributed system to control the motor control switch.

The present disclosure describes an electrical power system that comprises an electrical load having a multi-turn winding that has a first portion having a first plurality of turns and a second portion having a second plurality of turns. The system also comprises a first converter for supplying a first AC current to the first portion and the second portion of the multi-turn winding and a second converter for supplying a second AC current to the second portion of the multi-turn winding.

The invention provides a permanent magnet alternating current servo motor rotor mechanical energy conversion loss suppression method and system. The permanent magnet alternating current servo motor rotor mechanical energy conversion loss suppression method comprises the steps of collecting operation parameter data in the operation process of a permanent magnet alternating current servo motor in real time; according to the operation parameter data in the operation process of the permanent magnet alternating current servo motor, whether the mechanical energy conversion loss amount generated by current operation of the permanent magnet alternating current servo motor meets a preset mechanical energy loss requirement or not is judged; and when the mechanical energy conversion loss generated by the operation of the permanent magnet alternating current servo motor does not meet the preset mechanical energy loss requirement, automatically adjusting the operation parameter data in the operation process of the permanent magnet alternating current servo motor according to the load change. The system comprises modules corresponding to the steps of the method.

A control method and apparatus (100) for a single-phase permanent magnet synchronous motor (10), a household appliance (200), and a storage medium. The control method comprises: acquiring voltage characteristics of a power frequency voltage applied to the single-phase permanent magnet synchronous motor (10) (01); acquiring a position trend of a rotor of the single-phase permanent magnet synchronous motor (10) (02); and controlling on / off of a switch (11) on the basis of the voltage trend and the position trend of the rotor, so that the position trend of the rotor matches the voltage characteristic, wherein the switch (11) is used for controlling on / off of the current of the single-phase permanent magnet synchronous motor (10) (03).

The invention relates to a dual motor unit (1) for a flywheel mass storage, having at least two electric machines (3a, 3b) coupled to a common rotor (2); wherein the electric machines (3a, 3b) each have a power characteristic curve (Pa, Pb) which is different from one another; and the dual motor unit (1) is configured to generate a total operating power in an operating speed range (Ω) by interaction of the electric machines (3a, 3b), wherein the total operating power is predefined by a total power characteristic curve (P max ) resulting from the different power characteristic curves (Pa, Pb) of the electric machines (3a, 3b), and the total power characteristic curve (P max ) depends non-linearly on the rotational speed (ω) of the common rotor (2), in order to improve a known flywheel mass storage such that the flywheel mass storage can receive and output a constant power with improved efficiency in an as large as possible operating speed range (Ω).

The invention relates to a method for operating an electric machine, wherein, during operation of the electric machine, a torque and a rotational speed of the electric machine are determined by means of an electronic computing device. During operation, a first power is determined by means of the electronic computing device as a function of the determined torque and the determined rotational speed, which is supplied by the electric machine during operation. During operation, a second power is determined by means of the electronic computing device, which is supplied to the electric machine during operation. During operation, at least one efficiency parameter characterizing the efficiency of the electric machine is determined by means of the electronic computing device as a function of the determined power values.During operation, control variables are varied by the electronic computing device depending on the determined efficiency value, by means of which the electronic computing device controls and thus operates the electric machine.

The present invention discloses a method and device for controlling the no-load back electromotive force of a permanent magnet motor. A switch is installed between the motor and the motor control module, and the switch is connected to the switch control module. First, it is determined whether the motor is in a no-load state. Then, according to the determination result, control information is sent to the switch control module to control the switch to open or close. In this way, during the vehicle neutral coasting test, the endurance consistency problem caused by the zero torque deviation of the motor is effectively solved. On the other hand, for four-wheel drive models and distributed drive models, when the vehicle is running normally and the motor is no-loaded, the motor can be prevented from generating back electromotive force, thereby saving battery power and effectively improving the vehicle's endurance.

Energy conversion device and vehicle. The energy conversion device comprises an electric motor (10), an electronic control unit (20), a traction battery (30), and a controller (40). The controller (40) controls all bridge arms (21) corresponding to the windings of the electric motor (10) so that coordination of drive and battery self-heating is achieved, and is configured to control the peaks and troughs of the real N-line current flowing through the N-line of the electric motor to cancel out or superimpose on the peaks and troughs of the real-phase current flowing through each phase of the windings of the electric motor (10), thereby decreasing or increasing the amplitude of the real-phase current of each phase of the windings at the peaks and troughs, thereby providing the electric motor (10) with a larger phase current to drive the electric motor (10). Thus, the torque output from the electric motor (10) is increased, thereby improving the overall dynamic performance of the vehicle or increasing the heat output of the electric drive system.

Provided are embodiments for a system and method for controlling a boost control circuit. Embodiments include a power supply and a boost converter circuit coupled to the power supply, wherein the boost converter circuit is operable to provide power to the load. Embodiments also include a 3-phase inverter coupled to the boost converter, wherein the 3-phase-inverter is operable to provide a 3-phase output, and a controller coupled to the boost converter and the 3-phase inverter. The controller can be configured to receive a voltage level of a power supply and a voltage level of a 3-phase inverter; compare a power threshold to at least one of: the voltage level of the power supply and the voltage level of the 3-phase inverter; and control an operation of the boost converter circuit to operate in a boost mode or a rectification mode based at least in part on the comparison.

This motor control device comprises: an assist torque command value generation unit which uses a steering torque to generate an assist torque command value; a manual steering command value generation unit which uses the steering torque and the assist torque command value to generate a manual steering command value; an integrated angle command value calculation unit which adds the manual steering command value to an automatic steering command value and calculates an integrated angle command value; and a switching unit which switches, in response to a switching signal, between first control for controlling an electric motor on the basis of the assist torque command value and second control for controlling the electric motor on the basis of the integrated angle command value.

To provide an electric working machine that is capable of detecting an unloaded condition of a motor with high accuracy.SOLUTION: An electric working machine comprises: a motor; a driving circuit; a physical quantity acquisition unitt; a change amount deriving unit; a total value calculation unit; and a driving control unit. The physical quantity acquisition unit acquires a physical quantity related to an operation state of the motor at each detection timing. The change amount deriving unit derives a change amount of the physical quantity at each detection timing. The total value calculation unit calculates, for each detection timing, a total value of change amounts that have been derived in a first period up to that detection timing. The driving control unit controls the motor on the basis of a first control scheme in response to the total value satisfying an unloaded detection requirement.SELECTED DRAWING: Figure 2

An inverter control device is capable of reducing an inverter junction temperature by minimizing a maximum value of a phase current flowing through an inverter. The inverter control device includes a current command output module configured to output a current command corresponding to an input torque command, a current command conversion module configured to receive the current command and a zero sequence current command, and phase-shift the current command to output a phase-shifted current command, a switching determination module configured to output a control signal based on an input motor rotation speed and the torque command, and a switching module configured to selectively output one of the current command and the phase-shifted current command in response to the control signal.

The present invention relates to a method for controlling an electromechanical actuator comprising a motor, the method comprising: - determining (102) a setpoint speed (Vc) of the motor; - generating (106) control signals from an inverter; - supplying (108) by the inverter electrical supply currents, according to the control signals, in order to rotate the motor at a rotational speed (Vm); and - measuring (110) the rotational speed (Vm) of the motor by a speed sensor. A frequency of the generated control signals is fixed and determined according to the setpoint speed (Vc), and a duty cycle of the control signals is adjusted according to the rotational speed (Vm) of the motor, measured by the speed sensor, so that the rotational speed (Vm) of the motor corresponds to the setpoint speed (Vc).

This invention provides a magnetic energy-controlled power supply system for power generation that reduces energy consumption during power generation and significantly improves power generation efficiency. [Solution] The system includes a base 10 on which a magnetic control unit 20 is mounted above, three energy storage devices 30, three controllers 40, and a crankshaft 50. The crankshaft is connected to a generator 60 and a drive unit 70. The magnetic control unit has three upright tubes 21 fixed to the base, each with a magnetic core 22 fitted inside, and each with an electromagnetic coil 23 wound around it. After energizing the electromagnetic coils, the magnetic pole direction is changed to push the magnetic cores upward and make them protrude, or push them upward and then pull them back. The crankshaft is pivotally mounted horizontally on the base, and three link rods 51 are joined to the crankshaft. The three link rods are pivotally connected to the three magnetic cores, and the crankshaft can be moved and rotated by the link rods using the protrusion or retraction of the magnetic cores.

The invention provides an electric working machine and a motor control method. The electric working machine according to one embodiment of the present invention is provided with a motor, a drive circuit, and a control circuit. The control circuit includes a physical quantity acquisition unit, a change amount derivation unit, a sum value calculation unit, and a drive control unit. The physical quantity acquisition unit acquires a physical quantity at each detection timing. The change amount deriving unit derives a change amount of the physical quantity at each of the detection timings. The sum value calculation unit calculates a sum value at each of the detection timings. The sum value corresponds to the sum of the one or more variations. The drive control unit controls the motor by means of the drive circuit according to a first control method on the basis that the sum value satisfies a no-load detection requirement.

The present application relates to the field of motor control technology, and specifically to an optimization control method, system and equipment for low-voltage high-power motors, which specifically include: determining the load authenticity of the low-voltage high-power motor according to the output power change and temperature change of the low-voltage high-power motor; determining the load distribution benefit ratio of the low-voltage high-power motor according to the output power change of all stator modules in the low-voltage high-power motor; obtaining the load contribution of the stator module according to the difference between the load of the stator module and the average level and the load distribution benefit ratio of the motor; determining the disabling requirement of each stator module according to the change in the load authenticity and the change in the load contribution, and optimizing the control of the low-voltage high-power motor, reducing the influence of the stator modules running at low load and overload on the motor operation efficiency, significantly improving the performance of the low-voltage high-power motor, and improving the coordination between different stator modules.

To provide an electric working machine that is capable of detecting an unloaded condition of a motor with high accuracy.SOLUTION: An electric working machine comprises: a motor; a driving circuit; a physical quantity acquisition unitt; a change amount deriving unit; a total value calculation unit; and a driving control unit. The physical quantity acquisition unit acquires a physical quantity related to an operation state of the motor at each detection timing. The change amount deriving unit derives a change amount of the physical quantity at each detection timing. The total value calculation unit calculates, for each detection timing, a total value of change amounts that have been derived in a first period up to that detection timing. The driving control unit controls the motor on the basis of a first control scheme in response to the total value satisfying an unloaded detection requirement.SELECTED DRAWING: Figure 2

Pulsed control of an externally excited synchronous machine (EESM) includes a boost circuit and method for (1) harvesting excitation energy stored in a rotor winding when the EESM transitions to an off-state after a turn-on pulse, (2) storing the harvested excitation energy on a storage device, (3) optionally "augmenting" the harvested excitation energy stored on the storage device, and (4) selectively "augmenting" the excitation energy stored on the storage device. And (4) when the EESM transitions to the on state in the next pulse, the collected and stored excitation energy is supplied as a boost voltage to the rotor, the boost voltage helps the rotor to rapidly overcome its starting inductance and rapidly switch on the rotor, so that the transition time from the off state to the on state is much faster at the beginning of the next pulse.

An electric working machine (1) according to one aspect of the present disclosure comprises a motor (10), a drive circuit (21), and a control circuit (30). The control circuit comprises a device for obtaining a physical quantity (31), a device for obtaining a variation (32), a summation calculator (40), and a drive control (34). The device for obtaining a physical quantity obtains a physical quantity each time a detection time is reached. The device for obtaining a variation obtains a variation of the physical quantity each time the detection time is reached. The summation calculator calculates a sum value each time the detection time is reached. The sum value corresponds to the sum of one or more variations.The drive control system controls the motor based on the fact that the total value fulfills a zero-load detection requirement, according to a first control system via the drive circuit.

The present invention relates to a control unit configured for controlling a motor driving a piston compressor pump below a selected rotational speed value. The motor is driven by a frequency converter comprising a rectifier unit being operatively connected to an inverter unit via an intermediate DC circuit. According to the present invention the control unit comprises a motor speed calculation unit for calculating, in the digital domain, the rotational speed of the motor based on measured BEMF voltages from the motor, a speed controller unit for calculating, in the digital domain, a stator current reference based on the calculated rotational speed and a rotational speed reference, a D / A converter unit for converting the calculated stator current reference from the speed controller unit to an analog stator current reference, a comparator unit for comparing, in the analog domain, the analog stator current reference and a measured current in the intermediate DC circuit of the frequency converter, and providing a comparator unit output in response to this comparison, and a PWM unit for providing PWM control signals to a phase commutation unit in response to the comparator unit output, said phase commutation unit providing a switch pattern to the inverter unit based on the measured BEMF voltages from the motor. The present invention further relates to an associated method.

A motor controller for an electric motor is provided. The motor controller includes an inverter configured to supply current to stator windings of the electric motor. The motor controller further includes a plurality of sensors configured to generate a sensor signal in response to detecting a parameter. The sensor signal represents a measured parameter. The motor controller further includes a processor coupled in communication with the inverter and with the plurality of sensors. The processor is configured to, in a first mode, transmit a control signal to the inverter to operate the electric motor at a first frequency. The processor is further configured to receive the sensor signal from the plurality of sensors. The processor is further configured to determine a first fault condition is present at the electric motor based on the measured parameter represented by the sensor signal.

Method for controlling an electromechanical actuator, electromechanical actuator and associated shading device. The present invention relates to a method for controlling an electromechanical actuator comprising a motor, the method comprising: determining (102) a setpoint speed (Vc) of the motor; generating (106) control signals from an inverter; supplying (108) by the inverter electrical supply currents, according to the control signals, in order to rotate the motor at a rotational speed (Vm); and measuring (110) the rotational speed (Vm) of the motor, by a speed sensor. A frequency of the generated control signals is fixed and determined according to the setpoint speed (Vc), and a duty cycle of the control signals is adapted according to the rotational speed (Vm) of the motor, measured by the speed sensor, so that the rotational speed (Vm) of the motor corresponds to the setpoint speed (Vc).Figure for the abbreviation: Figure 5.

The invention relates to the technical field of motor control, in particular to a control method and system for improving motor efficiency and a chef machine. The method comprises the following steps: acquiring working state data of a motor of a chef machine; the chef motor working state data is transmitted to the controller component for motor load sensing, and motor load sensing data is generated; generating an initial motor control instruction for a controller component according to the motor load sensing data to obtain chef motor initial control instruction data; and performing time sequence state monitoring on the chef motor working state data based on the chef motor initial control instruction data to generate motor working time sequence state data. According to the invention, through real-time load sensing, load balancing control, energy recovery optimization and dynamic feedback adjustment, the efficiency of the motor during long-term operation is improved.

The invention relates to an inverter control apparatus, an inverter control method, and a vehicle including the inverter control apparatus. Specifically, the inverter control device can reduce the junction temperature of the inverter by minimizing the maximum value of the phase current flowing through the inverter. The inverter control device comprises a current command output module, a current command conversion module, a switching determination module and a switching module, wherein the current command output module is configured to output a current command corresponding to an input torque command; the current instruction conversion module is configured to receive a current instruction and a zero-sequence current instruction, and perform phase shift on the current instruction to output a phase-shifted current instruction; the switching determination module is configured to output a control signal based on an input motor rotating speed and a torque instruction; the switching module is configured to selectively output one of a current command and a phase shifted current command in response to a control signal.

The invention provides a motor step-down power-saving device and an intelligent AC induction motor system, line voltage real-time monitoring data, line current real-time monitoring data and motor environment real-time monitoring data of a target AC induction motor are monitored and collected through a motor monitoring module, and a motor control module, such as a microcontroller, is used for controlling the voltage of the target AC induction motor. When it is judged that the target AC induction motor meets the voltage reduction and power saving conditions, a target line voltage effective value of the target AC induction motor is calculated based on a pre-trained motor voltage regulation parameter prediction model, and a voltage regulation control signal is generated according to the target line voltage effective value so as to control a motor voltage regulation module to adjust the terminal voltage of the target AC induction motor to the target line voltage effective value; therefore, the terminal voltage and the stator current input into the target alternating-current induction motor are adjusted in time by applying the optimal control principle, so that the target alternating-current induction motor is always in the optimal working state, the motor energy consumption is reduced, and the motor efficiency and the power saving rate are improved.

The invention relates to a method (100) for determining at least one target current (I s ) for operating an electric machine (12), comprising steps for determining a first value of an intermediate circuit voltage ( us , motk ) when operating the electric machine (12) in motor operation, determining a second value of the intermediate circuit voltage (us, genk) for operating the electric machine (12) in generator mode based on the first value of the intermediate circuit voltage ( us , motk ) and determining at least one target current (I s ) to operate the electric machine (12) based on the second value of the intermediate circuit voltage (us, genk)

This disclosure generally relates to systems and methods for controlling electrical systems. A method for controlling an inverter circuit (820) is disclosed, comprising: receiving a first signal indicating a vertical flight mode; implementing a first switching sequence to control the inverter circuit (820) during the vertical flight mode, wherein the first switching sequence includes two zero vectors and six active vectors; receiving a second signal indicating a propeller stow mode; and implementing a second switching sequence to control the inverter circuit (820) during the propeller stow mode, wherein the second switching sequence includes fewer switching vectors than the first switching sequence.

The invention relates to the technical field of motor control, in particular to an optimal control method, system and device for a low-voltage high-power motor, and the method specifically comprises the steps: determining the load authenticity of the low-voltage high-power motor according to the output power change and temperature change of the low-voltage high-power motor; determining a load distribution beneficial ratio of the low-voltage high-power motor according to output power changes of all stator modules in the low-voltage high-power motor; obtaining the load contribution degree of the stator module according to the difference between the load of the stator module and the average level and the load distribution beneficial ratio of the motor; and determining the forbidden demand degree of each stator module according to the variable quantity of the load authenticity and the variable quantity of the load contribution degree, and carrying out optimization control on the low-voltage high-power motor, thereby reducing the influence of the stator modules in low-load operation and overload operation on the operation efficiency of the motor, remarkably improving the performance of the low-voltage high-power motor, and improving the reliability of the motor. And the coordination between different stator modules is improved.

A pulsed control of an Externally Excited Synchronous Machines (EESM), including a boost circuit and method for (1) harvesting the field energy stored in rotor winding when the EESM is transitioning to the off state following an on pulses, (2) storing the harvested field energy on a storage device, (3) optionally topping up the harvested field energy stored on the storage device, and (4) supplying the harvested and stored field energy as a boost voltage to the rotor, just as the EESM is transitioning on for the next pulse, the boost voltage aiding the rotor in quickly overcoming its start-up inductance, rapidly turning on the rotor, resulting in a much faster transition time from the off state to the on state at the start of the next pulse.