A Method of Improving the Real-time Performance of Switch Table Mode Direct Torque Control

Abstract

The invention belongs to the technical field of direct torque control of a switching table mode and discloses a method capable of improving the instantaneity of direct torque control of a switching table mode. A stator flux linkage vector component is converted into corresponding components in a 60-degree coordinate system and the number of a sector, in which a stator flux linkage vector is located, in voltage vector area division is firstly judged according to the numerical values of two components; and two small sectors for the flux linkage vector are arranged in each voltage vector sector,the numbers of the small sectors are judged through logical comparison and shift operations according to coordinate component values of the flux linkage vector and the sector in which stator flux linkage is located is determined through the numbers of the small sectors. According to the method, the sector in which the stator flux linkage is located is judged in the 60-degree coordinate system, only simple logic judgment and shift operations are needed and the shift operations are mainly targeted at operations of multiplication by 2 and 0.5 in the algorithm implementation process.

Description

technical field [0001] The invention belongs to the technical field of switch table mode direct torque control, in particular to a method for improving the real-time performance of switch table mode direct torque control. Background technique [0002] The switch table mode direct torque control generally divides the stator flux interval into 6 sectors, and the sector judgment of the stator flux vector is an important link to realize the direct torque control. However, the traditional stator flux vector sector judgment is carried out in a stationary orthogonal coordinate system, according to the calculated coordinate component ψ of the stator flux in the orthogonal coordinate system α and ψ β , get the tangent value of the position angle of the flux linkage recombined with ψ α and ψ β The sign of , and determine the sector where the stator flux vector is located by comparison. The traditional stator flux vector sector judgment algorithm involves many trigonometric funct...

AI Technical Summary

Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: traditional switch table mode direct torque control cannot effectively avoid trigonometric function operations and division operations due to sector judgment, and the execution process takes a lot of time, which is not conducive to the real-time performance of the entire algorithm

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