Analysis and improvement of levitated-winding power converters of a bearingless switched reluctance motor

作者：Yang Gang^*; Deng Zhiquan; Cao Xin; Luo Jianzhen; Fan Dong; Wang Xiaolin

来源：Transactions of China Electrotechnical Society, 2010, 25(2): 41-48.

• Bearingless
• Bearingless switched reluctance motor
• Control strategies
• Current ripples
• Digital hysteresis loop
• Half-bridge
• Levitated winding
• Radial forces
• Small signal model
• State-control
• Switched Reluctance Motor
• Three-phase four-leg

In this paper the principle of a bearingless switched reluctance motor is briefly introduced. According to the control strategy of torque and radial force, the characteristics and disadvantages of the three-phase half-bridge power converter are explained. Then based on the small signal models of torque and radial force, the influence of current ripple on torque and radial force is analyzed. According to these analyses, the improved measure is taken that the levitated winding power converters adopt the three-phase four-leg topology and the digital hysteresis loop of current worked on tri-state control mode. Then all kinds of work states and mathematical models of power converters are expounded. The magnitude and difference between current ripples of two kinds of converters in digital hysteresis loop control mode are analyzed. The experimental results verify the effectiveness of the improved measures.

• 出版日期2010
• 单位南京航空航天大学