Motor group current sensor cooperation system based on self-generated detection signal and correction method thereof

Abstract

The invention provides a motor group current sensor cooperation system based on a self-generated detection signal and a correction method thereof. The midpoint of an inverter three-phase bridge arm ofeach motor subsystem is connected with a corresponding motor three-phase winding; each motor three-phase winding cable forwardly passes through a current sensor signal detection port thereof; and aninverter input power supply positive end cable of each motor subsystem sequentially and forwardly penetrates through a three-phase current sensor measuring hole of the previous motor subsystem from the second motor subsystem, and an inverter input power supply positive end cable of the first motor system forwardly penetrates through a three-phase current sensor measuring hole of the last motor subsystem, so that collaborative correction of current sensor errors of the multiple motor subsystems of a motor group is achieved. According to the invention, the generation of the self-generated detection signal is realized without the help of external equipment, and the correction method has no restriction requirement, and does not depend on other system sensors, and the stability and the dynamicworking condition correction effect are better.

Description

technical field [0001] The present invention relates to the field of motor group control, in particular to a frequency-variable AC motor group control system and a correction method, to a method for coordinated control of an even-numbered multi-motor group, and in particular to a phase current sensor error online system including an even-numbered multi-motor group system. Co-correction control method. Background technique [0002] With the development of modern industrial applications, problems related to motor group control have become an important research direction in the field of motor system control, especially the coordinated control of multiple motor subsystems in the motor group system and related issues. The coordinated control of the motor group needs to provide the feedback signal of each motor subsystem for system analysis, and control each motor subsystem of the motor group separately according to the principle of current distribution or coordinated control. Ho...

AI Technical Summary

Problems solved by technology

In order to solve the problem of motor group control, especially in the field of coordinated control of multiple motors, the current sampling error cannot be corrected collaboratively. The chopping cycle of the motor is set to the adjacent orthogonal mode, and the detection signal generated by the motor group system is used to detect the current value, and the correlation between the sensors of each motor subsystem is established to realize the error between each motor subsystem. Collaborative calibration can finally ensure the precise control of the motor group system control, and the required calculation amount is small, and the implementation method is simple

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