Analysis of winding arrangements of bearingless switched reluctance motors based on three-phase half-bridge power converter of the levitation windings

作者：Yang Gang^*; Deng Zhi Quan; Cao Xin; Liu Ze Yuan; Luo Jian Zhen; Wang Xiao Lin

来源：Proceedings of the CSEE, 2008, 28(27): 95-103.

• Bearingless
• Levitation winding
• Midpoint voltage
• Switched reluctance motor
• Three-phase half-bridge

Bearingless switched reluctance motors have integrated merits of general switched reluctance motors and magnetic bearings. The power converter which is one of important components of bearingless switched reluctance motors controls current of motor windings. Therefore it mostly influences the rotation and levitation of bearingless motors. When the topology of levitated-windings power converters is three-phase half-bridge, the midpoint voltage of converters unbalances with asymmetric load. In this paper after the principle of radial force generation and mathematical model of motor are briefly introduced, the reason for imbalance of midpoint voltage and the influence of windings arrangement on midpoint voltage are analyzed when regarding the power converter and motor as a whole. The sum of every phase levitated force and the influence of the sum on midpoint voltage are obtained with five kinds of windings arrangement. On condition that the reasonable structure of windings is arranged, the imbalance of midpoint voltage is alleviated heavily with the invariable radial load. At last four kinds of optimized windings arrangement are given. The experimental results verify the correctness of theoretic analysis.

• 出版日期2008
• 单位南京航空航天大学