A high-speed embedded permanent magnet synchronous motor current decoupling control method

A permanent magnet synchronous motor, current decoupling technology, applied in motor generator control, electronic commutation motor control, control of electromechanical brakes, etc. Easy to parse effects

Active Publication Date: 2019-04-02
HEBEI UNIV OF TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Based on the existing accurate discrete mathematical model, the control method introduces discrete sliding mode control (D-SMC), and combines discrete sliding mode control with ideal current decoupling controller. When the control system is subjected to parameter perturbation and external disturbance When other factors are affected, the dq-axis current coupling can still be effectively eliminated, which solves the technical problem that the dq-axis current decoupling effect becomes worse when the ideal current decoupling controller has parameter perturbations and external disturbances, thereby improving the parameters of the control system adaptability and robustness

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  • A high-speed embedded permanent magnet synchronous motor current decoupling control method
  • A high-speed embedded permanent magnet synchronous motor current decoupling control method
  • A high-speed embedded permanent magnet synchronous motor current decoupling control method

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Embodiment 1

[0120] In this embodiment, the current decoupling control method of a high-speed embedded permanent magnet synchronous motor includes the following steps:

[0121] The first step is to establish an accurate discrete mathematical model of the permanent magnet synchronous motor:

[0122] After considering the digital control delay factor, the precise discrete mathematical model of the permanent magnet synchronous motor is obtained, that is, formula (6):

[0123]

[0124] Among them: u d ,u q Respectively d, q axis voltage, j is the complex domain, z is the discrete domain, T s is the sampling time, R s is the stator resistance, w e is the rotor electrical angular velocity, L d , L q is the d, q axis inductance;

[0125] The second step is to build a high-speed permanent magnet synchronous motor current decoupling controller:

[0126] 2-1. Build an ideal motor current decoupling controller:

[0127] Assuming that in an ideal situation, that is, when the permanent magn...

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Abstract

The present invention relates to a high-speed embedded permanent magnet synchronous motor current decoupling control method. According to the control method, discrete sliding mode control (D-SMC) is introduced on the basis of an existing exact discrete mathematical model; the discrete sliding mode control and an ideal current decoupling controller are combined; when a control system is subject to the influences of factors such as parameter perturbation and external disturbance, dq-axis current coupling can be still effectively eliminated; and therefore, the technical problem of the deterioration of a dq-axis current decoupling effect of the ideal current decoupling controller when parameter perturbation and external disturbance occur can be solved, and the parameter adaptability and robustness of the control system can be improved.

Description

technical field [0001] The invention relates to the technical field of embedded permanent magnet synchronous motor control, in particular to a high-speed embedded permanent magnet synchronous motor current decoupling control method. Background technique [0002] Built-in permanent magnet synchronous motor (abbreviated as IPMSM, hereinafter referred to as permanent magnet synchronous motor or motor) is widely used in various industrial occasions such as electric vehicles and heavy industrial machinery due to its high efficiency, high power density and high inertia ratio. . IPMSM has the characteristics of special rotor structure and protruding magnetic poles. The reluctance torque generated by the asymmetry of the rotor structure helps to improve the overload capacity of the motor. It is easier to use the armature reaction to achieve field weakening control, expand the speed range, and enable the motor to run at a higher speed. [0003] The high-speed interior permanent mag...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/22H02P21/00
CPCH02P21/0007H02P21/0017
Inventor 董砚辛瑞芝荆锴张豪郭瑾
Owner HEBEI UNIV OF TECH
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