Compensation method for non-linear periodic oscillation of PMSM position signal

A technology of permanent magnet synchronous motor and compensation method, which is applied in the control of generators, motor generators, and electromechanical transmissions, etc., can solve the problems of system divergence and system runaway, so as to ensure stability, easy operation, and reduce the number of motors. The effect of loss

Inactive Publication Date: 2018-01-12
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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Problems solved by technology

Since the position signal is used for magnetic field orientation, if the detected position angle deviates greatly from the actual position angle, it will inevitably cause the system to diverge from the steady state, and eventually lead to the loss of control of the system

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  • Compensation method for non-linear periodic oscillation of PMSM position signal
  • Compensation method for non-linear periodic oscillation of PMSM position signal
  • Compensation method for non-linear periodic oscillation of PMSM position signal

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[0053] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples, so as to fully understand and implement the process of how to apply technical means to solve technical problems and achieve technical effects in the present invention. It should be noted that, as long as there is no conflict, each embodiment and each feature in each embodiment of the present invention can be combined with each other, and the formed technical solutions are all within the protection scope of the present invention.

[0054]In practical applications, the position sensor is generally installed at the rotor at the end of the motor. However, due to various reasons during installation, the central axis of the sensor rotor and the shaft centerline of the motor are not on the same straight line. In this case, the position sensor necessarily introduces a non-linear oscillating signal related to the electrical cycle. Since the p...

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Abstract

The invention discloses a compensation method for non-linear periodic oscillation of a permanent magnet synchronous motor (PMSM) position signal. The compensation method includes the steps of acquiring the actual angular velocity and the actual angle of a rotor of the PMSM, obtaining an ideal angular velocity according to the actual angular velocity, obtaining the angular velocity difference through the ideal angular velocity and the actual angular velocity, obtaining the angle deviation according to the angular velocity difference, and using the angle deviation to compensate the actual angleof the rotor. According to the compensation method, compensation for the non-linear periodic oscillation of position signals is realized. The compensation method is simple, the operation is convenient, and the influence of the signal nonlinear periodic oscillation on the operation of the motor can be reduced to a certain extent. The actual engineering data shows that DC bias in the three-phase current can be effectively eliminated, the motor loss is reduced, and the operation stability of the motor is guaranteed.

Description

technical field [0001] The present invention relates to the technical field of permanent magnet synchronous motor (PMSM, Permanent Magnet Synchronous Motor), in particular to a method for compensating the nonlinear periodic oscillation of the position signal of the permanent magnet synchronous motor, and also to a method for compensating the permanent magnet synchronous motor A system for compensating the nonlinear periodic oscillation of the position signal of the magnetic synchronous motor. Background technique [0002] At present, the position sensor generally adopts the resolver. figure 1 A schematic diagram of the electrical principle of a brushless resolver is shown. Such as figure 1 As shown, the primary excitation winding (R1-R2) of the resolver and the mutually orthogonal secondary induction windings (S1-S3, S2-S4) are on the stator side. However, there is no winding on the rotor of the variable reluctance resolver, and the special arrangement on the rotor side m...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/18
Inventor 尚敬许峻峰文宇良黄佳德曾小凡张朝阳刘勇郑汉锋刘雄何亚屏
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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