The influence of feedback channel delay of servo motor control system on current loop bandwidth and dynamic response

Abstract

In the servo control system of permanent magnet synchronous motor, the current loop, as the innermost loop, has the greatest impact on the performance of the whole system. For many reasons, the delay time exists in the current loop. This paper focuses on the analysis of the less analyzed feedback channel delay in the previous papers, obtains the relationship between the feedback channel delay time and the current loop bandwidth, and compares the relationship between the forward channel delay time and the current loop bandwidth, and analyzes the relationship between the feedback channel delay and the current loop dynamic response, which provides a theoretical basis for the actual project to improve the current loop bandwidth.