Self-adaptive phase compensation characteristics and safeguard-phase-margin design of an unsymmetrical current-sensing resistor for magnetically suspended flywheels

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Self-adaptive phase compensation characteristics and safeguard-phase-margin design of an unsymmetrical current-sensing resistor for magnetically suspended flywheels

Ren, Yuan

This paper presents the self-adaptive phase compensation characteristics and quantitative design of an unsymmetrical current-sensing resistor for magnetically suspended flywheel (MSFW) system with strong gyroscopic effects. Aimed at the nutation stability of the MSFW control system, the self-adaptive phase compensation characteristics of PWM H-bridge unipolar switching power amplifiers with unsymmetrical current-sensing resistor with inductance variations is analyzed firstly, including the initial compensation frequency and compensation phase in the compensation working regions. Secondly, the quantitative safeguard-phase margin design method for the asymmetrical factor in H-bridge unipolar switching power amplifiers is proposed based on the nutation stability criterion. Finally, the influence of the unsymmetrical current-sensing resistance network on the nutation stability is further analyzed. Simulation and experimental results demonstrate the correctness and effectiveness of the proposed method.

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Title :

Self-adaptive phase compensation characteristics and safeguard-phase-margin design of an unsymmetrical current-sensing resistor for magnetically suspended flywheels

Contributors:

Ren, Yuan (author) / Chen, Xiaocen / Cai, Yuanwen / Miao, Cunxiao / Wang, Weijie

Published in:

Proceedings of the Institution of Mechanical Engineers / G ; 231 , 14

Publication date :

2017

ISSN :

0954-4100

DOI :

https://doi.org/10.1177/0954410016685121

Type of media :

Article (Journal)