809results about "Single motor speed/torque control" patented technology

The invention relates to the technical field of vibration and noise control, discloses a new energy automobile motor high-frequency vibration and noise active suppression system and method, and aims to solve the problems of poor high-frequency vibration and noise suppression effect, real-time performance, adaptive capacity and system cost complexity of an existing new energy automobile motor. The method comprises the following steps: acquiring and preprocessing motor operation state data, extracting high-frequency harmonic characteristics, and generating predicted harmonic characteristics in combination with working condition prediction; and superposing the self-adaptive compensation quantity to a motor voltage instruction, and driving an inverter through pulse width modulation to realize active suppression of high-frequency vibration and noise. The system comprises a data acquisition preprocessing module, a harmonic feature extraction module, a working condition sensing prediction module, a self-adaptive compensation quantity generation module and a pulse width modulation correction module. By the adoption of the technical scheme, efficient, real-time and self-adaptive suppression of high-frequency vibration and noise of the motor can be achieved, the level of the high-frequency vibration and noise is remarkably reduced, the driving comfort is improved, and the complexity and cost of the system are optimized.

The invention discloses a degradation trend prediction method for a brushless direct current motor, and relates to the technical field of motor control, current, temperature and vibration signals of motor operation are collected, a characteristic signal transmission path model of a winding, a bearing and magnetic steel is constructed, and the degradation trend of the brushless direct current motor is predicted by analyzing the reflection characteristics and attenuation conditions of degradation signals of all parts. Extracting characteristic quantities of mutual influence among current, temperature and vibration; according to the method, a multi-component characteristic signal transmission path model is constructed, degradation signals are regarded as fluctuation quantity transmitted and reflected among different components, mutual influence of current, temperature and vibration signals is comprehensively analyzed, false characteristics are separated in combination with heat transfer lag characteristics and cooperative change critical points, accurate extraction of real degradation characteristics is realized, and the accuracy of the degradation characteristic extraction is improved. The problem that weak degradation signals are covered by interference is solved.

The invention belongs to the technical field of industrial control, and particularly relates to a brushless direct current motor high-efficiency control method and system based on an FOC algorithm, and the method comprises the steps: superposing high-frequency sine disturbance in a voltage instruction, extracting a response component, achieving the online identification of the equivalent impedance of a motor, and dynamically solving and updating the estimated values of resistance and inductance; and correcting d-axis and q-axis voltage feed-forward items in real time by using the updated parameters, and correspondingly adjusting a current loop proportion and an integral gain. The method can adapt to the time-varying characteristics of motor parameters in an industrial field, so that the accuracy of feed-forward compensation and the stability of current loop bandwidth are effectively guaranteed, and the robustness and the control precision of a control system under complicated industrial working conditions such as variable temperature and variable load are remarkably improved; and the requirements of high-end industrial equipment on high performance and high reliability of the motor driving system are met.

The invention provides a vibration control method and electronic equipment, and relates to the technical field of terminals. The motor vibration parameter can be obtained by integrating the use state and the electric quantity information of the electronic equipment, self-adaptive adjustment of the vibration parameter is achieved, and the use experience of a user is improved. The method is applied to the folding screen electronic equipment and comprises the following steps: acquiring a use state of the electronic equipment; acquiring electric quantity information of the electronic equipment; and acquiring vibration parameters according to the use state and the electric quantity information. And driving the motor to vibrate according to the vibration parameters.

The invention discloses a self-adaptive brushless motor control method and system, and relates to the field of intelligent control, and the method comprises the steps: collecting the original data of the operation state of a motor through a sensor group, and carrying out the preprocessing; time-varying parameter identification is completed through combination of an extended Kalman filtering algorithm and a radial basis function neural network, an evaluation index system is constructed based on an analytic hierarchy process to obtain a comprehensive evaluation value, and a related trend is predicted through a long and short-term memory neural network; constructing a multi-modal control strategy library, determining an adaptive strategy, optimizing core parameters by using an improved particle swarm optimization algorithm, generating a control instruction, and outputting a corresponding current through a power driving module; and monitoring motor parameters in real time, comparing with a control target value, calculating deviation, correcting an identification result, adjusting a strategy threshold value, and updating and optimizing an objective function. The method has the advantages that by accurately sensing the state of the motor, dynamically adapting the control strategy and optimizing parameters in real time, it is ensured that the motor stably and efficiently operates under the complex working condition, and the characteristics of energy conservation and long service life are achieved.

A tool is provided including a motor, a power switch circuit disposed between a power source and the motor, and a control unit that controls the power switch circuit to drive the motor. The control unit is configured to apply a current clip threshold to a current passing through a bus line located between the power source and the power switch circuit to maintain a peak current of the bus line at approximately the current clip threshold. The control unit is further configured to variably control the current clip threshold based on the current passing through the bus line.

The embodiment of the invention discloses a brushless direct current motor control system, and the system comprises a communication module which is used for receiving a control instruction; the detection module is used for collecting state information of the brushless direct current motor in real time; the control module is electrically connected with the communication module and the detection module and is used for executing a field-oriented control algorithm in a fixed-point operation mode based on the control instruction and the state information of the brushless direct current motor so as to generate a motor driving signal; and the driving module is connected with the control module and is used for receiving the motor driving signal and driving the brushless direct current motor to operate. According to the brushless direct current motor control system provided by the embodiment of the invention, hardware operation load is simplified through fixed-point operation, a low-cost embedded processor is adapted, and the problem that a field-oriented control algorithm on a low-cost hardware platform is difficult to consider both operation efficiency and control precision is solved.

The invention provides an aviation permanent magnet synchronous motor control architecture based on master-slave redundancy and model prediction, belongs to the field of aviation electric propulsion control systems, and aims to solve the problems of extreme environment parameter drift, single-fault shutdown, multi-target control conflict, fault diagnosis lag and the like of an existing system. The control architecture comprises a master-slave dual-redundancy control unit, a wide-temperature-range adaptive model prediction control unit, an electromagnetic interference adaptive suppression unit and a multi-dimensional fault tolerance unit. According to the invention, a DSP + FPGA heterogeneous redundant architecture is matched with two-out-of-three voting logic, so that fault non-perception switching is realized; an extended Kalman filter observer is embedded to update motor parameters on line, and take-off / cruise / landing three modes are preset; interference at the frequency band of 100kHz-10MHz is controlled and suppressed through adaptive notch filtering and a sliding mode variable structure; a long short-term memory network is fused to realize accurate diagnosis of early faults, and the system is adaptive to aviation scenes such as electric general aviation aircrafts and unmanned aerial vehicles.

The invention belongs to the technical field of permanent magnet synchronous motor control, and particularly discloses a permanent magnet synchronous motor finite time switching active-disturbance-rejection rotating speed control method, which comprises the following steps: acquiring a reference rotating speed and an actual rotating speed of a permanent magnet synchronous motor; the absolute value of the error between the reference rotating speed and the actual rotating speed is calculated and compared with a preset first threshold value and a preset second threshold value, and the stage of the permanent magnet synchronous motor is judged; constructing a finite time cascade expansion state observer comprising a first-stage finite time ESO and a second-stage linear ESO to observe the state and lumped disturbance of the permanent magnet synchronous motor; and based on the stage of the permanent magnet synchronous motor, selecting a composite state of the observation value of the first-stage finite time ESO, the observation value of the second-stage linear ESO or the observation value of the first-stage observer and the observation value of the second-stage observer generated based on the Bezier curve to generate the rotating speed loop control law of the permanent magnet synchronous motor. According to the invention, the problems that the transient anti-interference capability is weak and the current performance is reduced due to the fact that transient control and steady-state control are not distinguished in the prior art are solved.

The invention relates to a sensorless brushless direct current motor direct torque control method based on robust extended Kalman filtering. The method comprises the following steps: acquiring stator voltage and current, and estimating an estimated rotor position, an estimated speed and an estimated electromagnetic torque of a motor through a robust extended Kalman filtering algorithm; determining a voltage space sector where a rotor flux linkage vector is located based on the estimated rotor position and the estimated speed of the motor; determining a target value based on the estimated electromagnetic torque and a reference electromagnetic torque, the target value being used to characterize a magnitude of desired electromagnetic torque adjustment; based on the voltage space sector where the rotor flux linkage vector is located and the target value, a voltage vector corresponding to the motor is obtained, and the voltage vector is used for driving the rotor flux linkage vector to rotate in the needed direction. By adopting the method, accurate control of the motor is realized without adopting a sensor.

The invention discloses an underwater brushless direct current motor control method based on fuzzy PID, and belongs to the technical field of underwater brushless direct current motor control. The problems that in an existing fuzzy PID technology, a brushless direct current motor is insufficient in control precision, a control rule is difficult to adapt to changes, and the parameter self-adjusting capacity is poor are solved. Input parameters and output parameters of fuzzy PID are set, the input parameters are rotation speed errors and rotation speed error change rates, and the output parameters are correction coefficients of proportionality coefficients, correction coefficients of integral coefficients and correction coefficients of differential coefficients; genetic gene coding is carried out on the membership function and the fuzzy rule of the fuzzy PID, and genetic gene coding is initialized; selecting a fitness function; a genetic algorithm rule is formulated, genetic manipulation is carried out by adopting a fitness proportion method and an elitist strategy combination rule, and then a new individual is generated based on a self-adaptive crossover and variation rule; and calculating the individual fitness based on the generated new individual, repeating until iteration is finished, and decoding to obtain an output parameter.

Method for operating a circuit arrangement as part of a BEMF zero crossing identification operation, which serves as the basis for sensorless commutation of a brushless DC motor, wherein the circuit arrangement has at least one comparator and a microcontroller, wherein the comparator is designed to compare a phase voltage or terminal voltage of the brushless DC motor with a star point voltage (reconstructed via the terminal voltages or directly tapped off) of the brushless DC motor and to output a corresponding comparator signal to a signal path of the microcontroller, which signal path is connected to the comparator, wherein the signal path of the microcontroller and / or microcontroller pin, which signal path is connected to the comparator, is periodically switched over between an input mode and an output mode.

Systems and methods provided herein relate to optimization of the motor of a pump system. Voltage-frequency ratios are adjusted while maintaining pumps speed in a systematic manner to lower power usage. Oscillations of the motor speed are detected, and voltage-frequency ratios adjusted to maintain low levels of oscillations while lowering power usage. Savings resulting in the optimization of the pump system are estimated.

The invention provides a permanent magnet synchronous motor rotating speed control method and system, and belongs to the technical field of motor control. The method comprises the following steps: firstly, constructing a discrete time mathematical model of a motor and an external source system comprising a lumped reference signal and lumped interference, and establishing a composite system model according to the discrete time mathematical model; then, constructing a dimensionality reduction observer to estimate an external source signal, and performing state and input transformation in combination with a regulator equation; thirdly, constructing a constraint set of the transformation system, and decomposing a state variable into a nominal component, a deterministic error component and an uncertain error component; a time-varying constraint tightening set is dynamically constructed according to the error, a model prediction control optimization problem with dynamic tightening constraint is solved online, and a nominal control quantity is obtained; and finally, combining the nominal control quantity and the estimated external source signal to synthesize an actual control voltage. According to the method, interference can be effectively suppressed, system security constraints are strictly ensured, recursion feasibility and closed-loop stability of control are ensured, and the dynamic response speed is increased.

The application discloses a kind of bipolarity switched reluctance motor control methods of distributed winding, comprising: 1) selecting suitable bipolarity switched reluctance motor, using distributed installation motor stator winding;2) based on the bipolarity switched reluctance motor selecting suitable power converter, motor each phase winding is connected using star connection mode;3) according to motor structure and the scheme of selected power converter division motor rotor position interval and making switch tube turn-on and turn-off;4) after starting, the commutation of motor is completed by two kinds of control methods.The application selects three-phase full-bridge power converter, reduces the cost of switched reluctance motor controller;Motor winding selects star connection, three-phase full-bridge circuit is connected with winding lead end, combined with the structure of the power converter, two commutation control methods of motor are proposed;Make motor total lead line quantity reduce, can be used in long distance power supply situation under motor drive field, such as downhole oil motor.

The invention relates to a brushless direct current motor simulator system and method. The brushless direct current motor simulator system comprises a motor simulator unit and an energy feedback unit. In the motor simulator unit, a motor resolving model calculates and outputs three-phase current as instruction current based on an input line voltage and a load torque instruction; the motor simulator unit controller takes an interface input side phase current as a tracking current and adopts a current tracking control strategy based on dynamic current deviation compensation to obtain an instruction voltage so as to drive and control a motor simulation power converter; in the energy feedback unit, a phase-locked loop obtains a power grid phase angle based on alternating current side voltage and current; and the energy feedback unit controller generates instruction voltage by adopting a fixed direct current side voltage control strategy based on power grid voltage orientation so as to drive and control the energy feedback power converter. Compared with the prior art, the square wave current and the trapezoidal wave back electromotive force of the brushless direct current motor and the external port characteristics of the brushless direct current motor under normal operation and fault working conditions can be accurately simulated.

To maintain a stable rotary operation of a motor even if a drive command from the outside suddenly changes.SOLUTION: A motor drive control device 20 comprises: a motor drive section 300 which drives a motor 10 based on a drive control signal Sd for controlling the drive of the motor 10; a control section 200 by which the drive control signal Sd is generated and outputted based on a PWM signal Sc1; and a PWM output circuit 100 which outputs the PWM signal Sc1 to the control section 200. The control section 200 includes: a command value conversion processing section 210 which converts an operation command included in the PWM signal Sc1 into a target speed command value S2; and a follow-up drive control signal generation section 220 by which, in a case where the target speed command value S2 acquired from the command value conversion processing section 210 changes, the drive control signal Sd is generated based on a follow-up command value S3 of a command value on which follow-up processing is performed so as to change predetermined times in a predetermined ratio of the variation of the acquired target speed command value S2.SELECTED DRAWING: Figure 2

A method for controlling operation of a brushless winch motor includes comparing an actual first-moment operating parameter with a predicted first-moment operating parameter in first predicted operating data to obtain a first offset, outputting a first feedback parameter based on the first offset and a motor model and adjusting operation of the winch motor based on the first feedback parameter, obtaining an actual second-moment operating parameter of the adjusted winch motor, and comparing the actual second-moment operating parameter and the predicted second-moment operating parameter to obtain a second offset, correcting the operating model of the winch motor based on the second offset, outputting the predicted second-moment operating data based on the corrected operating model of the winch motor and adjusting motor operation based on a difference between the actual operating parameter of the winch motor and the predicted second-moment operating data as a second feedback parameter.

The invention relates to the technical field of motor control, in particular to a brushless motor electronic speed regulation circuit for an unmanned aerial vehicle and a control method of the brushless motor electronic speed regulation circuit. The brushless motor electronic speed regulation circuit comprises a printed circuit board, a power supply module and a grid driving module. The printed circuit board is provided with a plurality of wiring layers which are stacked, and comprises a first power supply layer and a second power supply layer which are adjacent to each other in the vertical direction and are overlapped and aligned, and an electrical control layer. The power supply module is arranged on the first power supply layer and the second power supply layer, the first power supply layer and the second power supply layer are electrically connected through a matrix via hole array, and the power supply module is used for being electrically connected with an external power supply and supplying power to a circuit after processing. The grid driving module is arranged on the electrical control layer, is powered by the power supply module and is used for outputting driving voltage to the brushless motor, large current transmission and balanced distribution of the multi-channel motor controller can be realized on a single printed circuit board, and electromagnetic interference of a power loop on a control signal is inhibited.

The present invention relates to the field of vehicle powertrain technology, and provides a boost module control method and apparatus for a vehicle motor, and a vehicle. The boost module control method for the vehicle motor includes: acquiring a driving intention parameter; and arbitrating a control mode of the boost module according to the driving intention parameter, where the control mode of the boost module includes a single-voltage-loop control and a double-loop control. It is possible to flexibly and accurately differentiate between requirements in different operating conditions based on the driving intention parameter, and enable the boost module to adopt a suitable control mode, thereby achieving a balance between the stability and the rapid response and improving the overall performance of the motor.

Various methods, controllers, and motor systems are described that facilitate pulse control of a motor to increase the energy efficiency of the motor when conditions permit. Selected transitions between pulse output levels are controlled to provide a cubic or higher order transition torque profile. In various embodiments, a cubic, quintic, or higher order transition profile is used. Using such a transition torque profile can improve the NVH characteristics of the motor while providing energy saving pulse transitions.

The invention relates to a brushless motor drive circuit, in particular to a brushless motor control drive circuit with high withstand voltage isolation strength, which comprises a control circuit for receiving and processing voltage signals fed back by a sampling circuit and a detection circuit and outputting control signals to the drive circuit; the driving circuit outputs a driving signal under the action of the control signal so as to drive the brushless motor to commutate or start and stop; the sampling circuit detects a current signal when the driving circuit works, converts the current signal into a first voltage signal and sends the first voltage signal to the control circuit, so that the control circuit monitors the three-phase current of the brushless motor in real time; the detection circuit is used for detecting a Hall signal of the brushless motor with a Hall sensor, converting the phase change state of the brushless motor into a second voltage signal and sending the second voltage signal to the control circuit, so that the control circuit can detect the position of the rotor in real time; according to the technical scheme, the defects that in the prior art, environment adaptability is poor, and precise driving of the brushless motor is difficult to achieve can be overcome.

The application provides a kind of stator double permanent magnet multi-tooth structure magnetic flux switching motor and its working method, belongs to permanent magnet variable reluctance motor technical field. Including coaxial arrangement stator core and rotor core, still including two sets of permanent magnets, stator core protruding arrangement has multiple equal angle interval arrangement big teeth, form solid slot between adjacent big teeth, each big tooth end is provided with small tooth, and define first virtual slot and two sides second virtual slot, rotor core is provided with multiple rotor teeth. Two sets of permanent magnets are tangential magnetization spoke yoke permanent magnet and radial magnetization slot permanent magnet respectively, spoke yoke permanent magnet is set in second virtual slot, slot permanent magnet is set in solid slot mouth and first virtual slot, the pole pair number of two sets of permanent magnets is equal to the number of big teeth on stator core, and the solid slot between big teeth is embedded with armature winding. Can solve the problem of low utilization rate of iron core and low motor output torque caused by structural defects in prior art traditional permanent magnet magnetic flux switching motor.

A system for a capacitor of an inverter of an electric vehicle. A system includes an inverter for converting direct current (DC) power from a battery to alternating current (AC) power to drive an electric machine, where the inverter includes: a capacitor assembly including: a planar busbar including a first DC busbar and a second DC busbar; a capacitor on the same side of the first DC busbar and the second DC busbar, the capacitor including a first end cap extending in a direction substantially perpendicular to a longitudinal direction of the planar busbar; and a first connection plate disposed at the first end cap to connect the capacitor to the first DC bus bar, and a second connection plate disposed at the second end cap to connect the capacitor to the second DC bus bar.

The invention relates to a compressor module (10), in particular for a compressed-air supply system (20) of a vehicle. The compressor module (10) comprises a compressor (12) and a speed-regulated brushless electric motor (14) for driving the compressor (12). During operation of the electric motor (14), a motor current (IB) arises. The electric motor (14) is assigned motor electronics having an electronic commutator and speed regulation. The compressor module is connected to or comprises an electronic control unit (100). The electronic control unit (100) is designed to specify, according to the average motor current (IB), one of at least two different target speeds for the electric motor (14), namely at least a predefined first target speed (n1, soll) and a predefined second target speed (n2, soll) which is less than the predefined first target speed (n1, soll), and to switch from specifying the predefined first target speed (n1, soll) to specifying the predefined second target speed (n2, soll) when the average motor current (IB) reaches or exceeds a specified motor-current current limit value (Imax; Imax, red).

The disclosure relates to calibrating electric motors for use with a heating, ventilating, and air conditioning (HVAC) system. Example embodiments include a method of calibrating a motor assembly, the method comprising: selecting (204) an electric motor (110) and a motor controller (111) for the motor assembly; obtaining (206) at least one electric motor parameter of the electric motor (110); determining (208) a correction factor for the electric motor (110) based upon the at least one electric motor parameter; and programming (212) the motor controller (111) with the correction factor.

The invention discloses a servo system speed loop parameter self-tuning method based on digital-analog linkage. The method comprises the following steps: establishing an open-loop transfer function of a speed loop of a servo system; parameters of a speed ring are initialized, a same-frequency and same-amplitude speed instruction is sent to a motor to drive a load to operate, and the total rotation inertia of the motor is calculated; a mapping relation equation is determined, and parameters of a speed PI controller are obtained; discretizing the parameters of the speed PI controller by adopting a bilinear method to obtain a discrete proportional gain and a discrete integral gain; determining constraint conditions of the servo system and calculating an evaluation function value according to the ITAE performance evaluation function; obtaining optimal control parameters by adopting a coordinate rotation method; corresponding discrete proportional gain and discrete integral gain are calculated according to the optimal control parameters to serve as parameters of a speed PI controller to complete parameter setting, and load operation is achieved according to a speed instruction. According to the method, the setting process is more efficient, the calculation parameters are more accurate, the manual debugging time can be greatly shortened, and the universality is good.

The invention relates to a method for operating an electric motor (1), in particular a piston pump (9), wherein the electric motor (1) has a rotor shaft (3) and is driven with a target rotational speed (n soll ) and a target direction of rotation for the rotor shaft (3) depending on a power requirement, wherein an actual rotational speed (n Ist ) of the rotor shaft (3) is monitored. The method according to the invention is characterized in that the target direction of rotation is changed for a predetermined period of time (t) when the actual rotational speed (n Ist ) is equal to zero and the target rotational speed (n soll ) is not equal to zero, and the electric motor (1) is then driven again with the target rotational speed (n soll ) and the target direction of rotation.

To provide a motor control device capable of improving accuracy and reliability of magnetic flux estimation.SOLUTION: A motor control device has a voltage command preparation unit (41) generating a voltage command for controlling output voltage of a power conversion device according to a speed command or a torque command of a motor in which a rotor has a permanent magnet, a dead time compensation unit (42) performing a dead time compensation for the voltage command, and a magnetic flux estimation unit (50) estimating a magnetic flux of the permanent magnet. The magnetic flux estimation unit estimates the magnetic flux of the permanent magnet based on the voltage command, and a voltage drop occurring in the motor and the power conversion device, and between the motor and the power conversion device. The voltage drop includes a first voltage drop component due to resistance components, a second voltage drop component occurring due to the dead time compensation, and a third voltage drop component that is the voltage drop from which the first voltage drop component and the second voltage drop component are excluded.SELECTED DRAWING: Figure 1

The invention relates to a dual three-phase permanent magnet synchronous motor model-free prediction repetitive control method and system based on a double-subspace virtual vector, and the method comprises the steps: decomposing the vector of a motor into a fundamental wave subspace and a harmonic wave subspace which are orthogonal to each other based on an obtained operation parameter, and constructing an independent super-local model in the two subspaces; constructing a linear expansion state observer in the fundamental wave subspace, and constructing a repetitive expansion state observer based on repetitive control in the harmonic wave subspace; respectively synthesizing an independent virtual voltage vector set and a decoupling virtual voltage vector set in the two subspaces; and calculating reference voltage vectors of the two subspaces, selecting an optimal virtual voltage vector and an optimal decoupling virtual voltage vector, respectively calculating optimal duty ratios, synthesizing control signals applied to each bridge arm of the inverter, and driving the dual three-phase permanent magnet synchronous motor. According to the method, model-free control of double sub-spaces is realized, model parameters of a motor system of an algorithm are controlled, and better robustness is shown when the parameters are mismatched.