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Error compensation system and method for position sensor of permanent magnet synchronous motor

A permanent magnet synchronous motor, error compensation technology, applied in the field of error compensation, can solve problems such as increased noise, deterioration of control stability, power loss, etc., to achieve compensation of accuracy errors, improve control accuracy and stability, and improve power loss and noise Effect

Active Publication Date: 2019-06-07
CHINA FIRST AUTOMOBILE
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Problems solved by technology

[0004] In order to improve the deterioration of control stability and the phenomenon of power loss and noise increase caused by errors in position information reported by position sensors such as permanent magnet synchronous motor resolvers, the present invention provides a permanent magnet synchronous motor position sensor error compensation system and method. It can effectively compensate the accuracy error caused by various reasons of the position sensor of the permanent magnet synchronous motor, improve the control accuracy and stability of the permanent magnet synchronous motor, and effectively improve the operating power loss and noise of the permanent magnet synchronous motor

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  • Error compensation system and method for position sensor of permanent magnet synchronous motor
  • Error compensation system and method for position sensor of permanent magnet synchronous motor
  • Error compensation system and method for position sensor of permanent magnet synchronous motor

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Embodiment Construction

[0031] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0032] figure 1 It is a schematic diagram of the overall control system of the existing permanent magnet synchronous motor; figure 2 A schematic structural diagram of a permanent magnet synchronous motor position sensor error compensation system provided by an embodiment of the present invention; image 3 is the internal structure diagram of the data storage unit; Figure 4 It is a diagram of the internal structure of the linear regression unit.

[0033] The existing permanent magnet synchronous motor overall control system such as figure 1 shown. Such as figure 1 As shown, the control strategy of the system is: the permanent magnet synchronous motor 1 generates three-phase current, the three-phase current sensor 10 detects the three-phase current ...

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Abstract

The invention provides an error compensation system for a position sensor of a permanent magnet synchronous motor, and the system is used for compensating for the rotor position of the permanent magnet synchronous motor. The invention also provides an error compensation method for the position sensor of the permanent magnet synchronous motor. According to the invention, during compensation each time, the data including the rotor position and the corresponding time is used for the fitting of the rotor position, and then a compensated rotor position is calculated by the corresponding relative time and a linear equation obtained by fitting at this time. Due to the fact that data of a plurality of calculation periods are fused, the system and method can effectively compensate for the precisionerrors caused by various reasons of the position sensor of the permanent magnet synchronous motor, improve the control precision and stability of the permanent magnet synchronous motor, and effectively reduce the operation power loss and noise of the permanent magnet synchronous motor.

Description

technical field [0001] The invention relates to an error compensation method, in particular to a permanent magnet synchronous motor position sensor error compensation system and method. Background technique [0002] Pure electric vehicles and hybrid vehicles will become the main forms of future vehicles due to their low pollution and emissions and high fuel economy. The power of pure electric vehicles and hybrid vehicles mainly uses permanent magnet synchronous motors, which are generally equipped with position sensor devices such as resolvers. The motor rotor position detected and decoded by the sensor will have certain errors. The rotor position error of the permanent magnet synchronous motor will affect the control accuracy, increase the current and torque fluctuation amplitude, increase the power loss of the motor, increase the noise content of the motor, and even seriously affect the motor control effect or even lose control. [0003] Therefore, there is an urgent nee...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02P21/14H02P21/18
Inventor 王飞李岩李帅陈晓娇李伟亮文彦东
Owner CHINA FIRST AUTOMOBILE
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