A weak magnetic control method of permanent magnet synchronous motor based on table check

A permanent magnet synchronous motor and field weakening control technology, applied in motor control, motor generator control, AC motor control and other directions, can solve the problems of bus voltage dependence, poor torque control accuracy, inaccurate current command, etc. Achieve the effect of occupying less storage space, comprehensive control, and less table data

Active Publication Date: 2022-03-11
江西精骏电控技术有限公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0011] 1. The current command is inaccurate, and the torque control accuracy is poor; 2. It takes up too much memory; 3. It is dependent on the bus voltage

Method used

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  • A weak magnetic control method of permanent magnet synchronous motor based on table check
  • A weak magnetic control method of permanent magnet synchronous motor based on table check
  • A weak magnetic control method of permanent magnet synchronous motor based on table check

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Embodiment Construction

[0067]The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, through the description of the embodiments, to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solutions of the present invention.

[0068] The invention is a field weakening control method of a permanent magnet synchronous motor based on a table look-up method. In order to solve the problems existing in the prior art and overcome its defects, to achieve the purpose of improving the accuracy of the given direct-axis current and quadrature-axis current, and to realize the precise control of the torque of the permanent magnet synchronous machine, such as Figure 1 to Figure 3 As shown, the design idea of ​​the present invention is as follows:

[0069] (1), table design ideas and the use of a table to complete the interpolation method of different voltages; ...

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Abstract

The invention discloses a field weakening control method of a permanent magnet synchronous motor based on a table lookup method, a design method of a current command table and an interpolation method of using a table to complete different voltages; a method for improving precision adopted by the table lookup; Sub-area processing method of the running interval. Adopting the above-mentioned technical solution, the table data is less and occupies less storage space; the table lookup method can more accurately interpolate values ​​that do not exist in the table data; the motor operation area is processed separately, making the control more comprehensive and accurate.

Description

technical field [0001] The invention belongs to the technical field of motor drive control. More specifically, the present invention relates to a field weakening control method of a permanent magnet synchronous motor based on a look-up table method. Background technique [0002] At present, the field weakening problem of permanent magnet synchronous motor (PMSM) is mainly studied from the perspective of motor design and control strategy. [0003] From the perspective of the motor body structure, some scholars have improved the field weakening performance of the motor by changing the excitation circuit, the permanent magnet excitation flux bypass, and the hybrid excitation to adjust the air gap flux. Other scholars improve the field weakening performance of PMSM from the perspective of control strategy. [0004] Field weakening control is mostly based on field-oriented control (FOC) and maximum torque per ampere (MTPA) control. MTPA control is mainly used to improve motor ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02P21/22H02P25/022H02P6/28
CPCH02P6/28H02P21/0089H02P21/22H02P25/024H02P2207/05
Inventor 王长江覃云张修武房伟
Owner 江西精骏电控技术有限公司
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