Permanent magnet synchronous motor control method and device, electronic equipment and storage medium

Abstract

The invention provides a permanent magnet synchronous motor control method and device, electronic equipment and a storage medium, and belongs to the technical field of motor drive control. The methodcomprises the following steps: acquiring an actually measured rotating speed value, a bus voltage value and an electrical angular speed value; calculating a difference value between the actually measured rotating speed value and a preset rotating speed value to obtain a rotating speed difference value; when the actually-measured rotating speed value is larger than or equal to the preset base speed, inputting the rotating speed difference value into a first speed regulator, and acquiring a torque instruction; substituting the bus voltage value and the electrical angular speed value into a preset formula to obtain a K value; and searching current information corresponding to the torque instruction and the K value in a preset corresponding relationship between the torque instruction and the Kvalue and the current information, and controlling the motor through the current information. The current information searched through the method is suitable for the condition of a bus voltage changeso that the finally obtained current information is more accurate.

Description

technical field [0001] The present application relates to the technical field of motor drive control, in particular to a permanent magnet synchronous motor control method, device, electronic equipment and storage medium. Background technique [0002] In recent years, in the field of household appliances, cost reduction is a gradual development trend, so the permanent magnet synchronous motors widely used in household appliances have also been improved accordingly. The bus capacitor in the traditional permanent magnet synchronous motor drive system uses large electrolytic capacitors, but large electrolytic capacitors have disadvantages such as short service life, large volume, and high price; and film capacitors have the advantages of long service life, small size, and low cost. Replacement of large electrolytic capacitors used in motor drive systems. The permanent magnet synchronous motor drive system using film capacitors without electrolytic capacitors on the bus has the ...

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Problems solved by technology

[0005] The purpose of the embodiment of the present application is to provide a permanent magnet synchronous motor control method to solve the problem that the direct axis current value and the quadrature axis current value obtained by using the existing look-up table method are inaccurate when the bus voltage fluctuates

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