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Control method for embedded permanent magnet synchronous motor

A technology of permanent magnet synchronous motor and control method, applied in the direction of motor control, motor generator control, AC motor control, etc., can solve problems such as the lack of real-time and accurate use of motor parameters, the influence of motor torque accuracy and motor operation efficiency, etc.

Active Publication Date: 2020-02-18
CRRC YONGJI ELECTRIC CO LTD
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  • Abstract
  • Description
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Problems solved by technology

[0003] The invention solves the problem that the motor parameters are not used accurately and in real time in the existing permanent magnet synchronous motor control method, so the torque accuracy output by the motor and the operating efficiency of the motor are affected, and provides a control method for an embedded permanent magnet synchronous motor

Method used

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  • Control method for embedded permanent magnet synchronous motor
  • Control method for embedded permanent magnet synchronous motor
  • Control method for embedded permanent magnet synchronous motor

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Embodiment Construction

[0082] The control method of embedded permanent magnet synchronous motor, its control block diagram (such as figure 1 As shown) includes a resolver module 1, a temperature sensor module 2, a stator resistance calculation module 3, a Clark transformation module 4, a Park transformation module 5, a stator inductance calculation look-up module 6, a permanent magnet flux linkage calculation module 7, and a torque calculation module 8. Current I* calculation module 9, current angle calculation module 10, robust decoupling controller module 11, PWM modulation module 12, three-phase inverter bridge module 13;

[0083] 1) Resolver module

[0084]The resolver is installed on the embedded permanent magnet synchronous motor, the rotor position θ of the permanent magnet synchronous motor can be measured through the resolver, and the rotor position θ can be differentiated to obtain the speed w of the permanent magnet synchronous motor e ;

[0085] 2) Temperature sensor module

[0086] A...

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Abstract

The invention relates to a control method for a motor, in particular to a control method for an embedded permanent magnet synchronous motor, so as to solve the problem that motor parameters are not accurately used in real time in an existing permanent magnet synchronous motor control method. According to the control method for the embedded permanent magnet synchronous motor, the influence of the temperature change and the motor saturation effect on the motor parameters is considered on line. The stator resistance Rs(T) and the stator inductance Ld(T) and Lq(T) are obtained through online tablelookup of the motor stator temperature T, the current amplitude Is and the current vector angle beta, the flux linkage value psif(Tr) is calculated in real time by using a flux linkage observation model, and the accuracy of motor control and decoupling is improved; and the given exciting current i< d ><*> and torque current i< q ><*> are redistributed by utilizing the output result of a torque closed loop, so that the permanent magnet synchronous motor is maintained to operate according to an MTPA track, and the heating and the loss of the motor are reduced. Decoupling control of the motor isrealized, and the robustness of a motor control system is enhanced.

Description

technical field [0001] The invention relates to a control method of a motor, in particular to a control method of an embedded permanent magnet synchronous motor. Background technique [0002] Permanent magnet synchronous traction systems are more and more widely used in the field of rail transit, especially embedded permanent magnet synchronous motors are in great demand. For embedded permanent magnet synchronous motors, the most important performance requirement is to produce accurate and efficient control performance in a wide range of environments, and one of the most important factors affecting the control accuracy of permanent magnet motors is the motor parameter stator inductance L d , L q , Stator resistance R s and permanent magnet flux linkage Ψ f The change. The change of motor parameters is mainly caused by the magnetic saturation effect of the iron core caused by the change of motor operating temperature and stator current. The traditional vector control met...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14H02P21/20H02P25/026H02P27/08H02P29/60
CPCH02P21/14H02P21/141H02P25/026H02P27/08H02P2205/01H02P2205/05H02P2207/05H02P21/20H02P29/60
Inventor 张瑞峰杨高兴张宇龙柴璐军詹哲军梁海刚贺志学
Owner CRRC YONGJI ELECTRIC CO LTD
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