Sensorless control for the deployable structure of the antenna based on square-wave injection method

Abstract

The deployable structure of the antenna proposes to adopt a PMSM (permanent magnet synchronous motor) to improve reliability. The traditional control method of PMSM requires mechanical sensors, which brings problems such as reduced reliability. The implementation of the high-frequency signal injection method is simple and flexible, and the method is not sensitive to motor parameters changes, so it has become the preferred method. In this paper, a sensorless control algorithm for the deployable structure of the antenna based on square-wave injection method is studied, which does not use filters compared with the sensorless control algorithm based on pulsating injection method, thereby improving the bandwidth and dynamic performance of the system.