A Dual-Redundancy Two-Phase Hybrid Stepping Motor for Satellite Antenna Drive System

Zhaoyang Fu,Xingbang Liu,Zheng Liu

doi:10.3390/en15051612

Abstract

Stepping motors are highly preferred in spacecraft applications because of their simple structure, convenient control and lack of accumulated error. In satellite antenna drive systems, reliability and fault tolerance have been paid more and more attention. Accordingly, to enhance the reliability of the electrical system in the field of aerospace, the redundancy technology, which can effectively improve the system reliability while reducing the requirements of components, was applied in the design of hybrid stepping motors (HSM), a dual-redundancy two-phase HSM which has two sets of stator windings was designed in this paper. The mathematical model of stepping motor and the specific structure parameters of the motor are given. The torque-frequency characteristic was regarded as the key to measure the performance of the motor proposed in this paper. The results of 3-D finite element modeling are presented. The corresponding performance experiment on the designed motor was carried out and both the simulation results and the experimental results verified the validity and superiority of the dual redundancy HSM.

Highlights

Because of the specificity of the work environment, the study of motors with high positioning accuracy and high reliability has become a research focus in the field of aerospace.In contrast with traditional motors, the stepping motor has the advantage of higher efficiency, power density and torque density [1]
The stepping motor could be divided into permanent magnet (PM), variable reluctance (VR) and hybrid stepping motor (HSM) according to the topology of the motor
A new stator-permanent-magnet HSM(SHSM), in which some permanent magnets were applied to the stator structure, was designed in [5]; the defects caused by axial magnetic field of rotor permanent magnet were eliminated

Summary

Introduction

Because of the specificity of the work environment, the study of motors with high positioning accuracy and high reliability has become a research focus in the field of aerospace.In contrast with traditional motors, the stepping motor has the advantage of higher efficiency, power density and torque density [1]. The open-loop control method of the stepping motor could avoid various position sensors that could reduce the reliability of the system. Combing the advantages of PM and VR, the HSM could provide better efficiency and is widely used in control applications for industries [4]. A new stator-permanent-magnet HSM(SHSM), in which some permanent magnets were applied to the stator structure, was designed in [5]; the defects caused by axial magnetic field of rotor permanent magnet were eliminated. The new SHSM had a better performance but the higher production costs led to fewer applications. Many stepping motors with new structure have been designed [6,7,8]

Methods

Results

Conclusion