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Resistance identification method and system of permanent magnet synchronous motor, medium and terminal

A technology for permanent magnet synchronous motors and identification methods, which is applied in control systems, control generators, motor control, etc., can solve problems such as inaccurate results and large deviations, improve system energy efficiency, reduce current, improve position accuracy and Effect of current control accuracy

Pending Publication Date: 2021-11-23
RUKING EMERSON CLIMATE TECH SHANGHAI CO LTD
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  • Application Information

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Problems solved by technology

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a resistance identification method, system, medium and terminal of a permanent magnet synchronous motor, which is used to solve the problem of existing two-point voltammetry identification of permanent magnet synchronous motor resistance. The results are inaccurate and the deviation is large

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  • Resistance identification method and system of permanent magnet synchronous motor, medium and terminal
  • Resistance identification method and system of permanent magnet synchronous motor, medium and terminal
  • Resistance identification method and system of permanent magnet synchronous motor, medium and terminal

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Embodiment Construction

[0048] The implementation of the present invention is described below through specific specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other.

[0049] It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic ideas of the present invention, and only the components related to the present invention are shown in the diagrams rather than the number, shape and num...

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Abstract

The invention provides a resistance identification method and system of a permanent magnet synchronous motor, a medium and a terminal. The method comprises the following steps: inputting a first direct-axis current instruction to the permanent magnet synchronous motor, and obtaining a first direct-axis voltage instruction; inputting a second direct-axis current instruction to the permanent magnet synchronous motor to obtain a second direct-axis voltage instruction; enabling a first preset direct-axis current corresponding to the first direct-axis current instruction to be not equal to a second preset direct-axis current corresponding to the second direct-axis current instruction; and calculating a deviation voltage according to the first direct-axis voltage instruction and the second direct-axis voltage instruction, and calculating the resistance of the permanent magnet synchronous motor based on the deviation voltage. Deviation voltage is introduced, and the resistance identification precision is improved; and before the resistance is identified, the motor rotor is pre-positioned, so that the rotor is blocked, the influence of motor shaking on the resistance identification result in the identification process is avoided, and the accuracy of resistance identification is improved.

Description

technical field [0001] The invention belongs to the technical field of permanent magnet synchronous motors, and in particular relates to a resistance identification method, system, medium and terminal of permanent magnet synchronous motors. Background technique [0002] The permanent magnet synchronous motor has the advantages of small size, high efficiency and high power factor, and has been widely used in various power transmission industries. Not only need to know the rotor position information, but also need to carry out the current loop control, due to the limitation of cost and application environment, the rotor position information is more and more popular to use the position sensorless control method to obtain, this kind of position sensorless control method and the current loop control have great influence on The motor parameters (resistance and inductance) have a strong dependence. The accuracy of the motor parameters directly affects the accuracy of the position a...

Claims

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Application Information

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IPC IPC(8): H02P21/14H02P25/022H02P21/24
CPCH02P21/14H02P25/022H02P21/24H02P2207/05
Inventor 赵健平马少才乔震宇
Owner RUKING EMERSON CLIMATE TECH SHANGHAI CO LTD
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