Self-Sensing Algorithm for Active Magnetic Bearings; Using Direct Current Measurements
In the field of active magnetic bearings (AMBs) the self-sensing theme attracts attention due to the ongoing drive for compact integration and cost reduction. Self-sensing makes use of the AMB’s actuator to sense the position and to convert electrical energy to mechanical energy. The aim of the direct current measurement method (DCM) is to reduce phase shift produced by demodulation methods used in the past. The DCM self-sensing scheme makes use of a specific PWM switching method, which enables the estimation of the rotor position by only measuring the power amplifier ripple current. The DCM technique also has the added benefit of less sensitivity for cross-coupling effects. In this paper the PWM switching method, the method used to extract the current ripple and scaling are discussed. Simulations are done on a transient AMB model which resembles the physical system and practical results are obtained from the practical implementations.
Self-Sensing Sensorless Sensor Active Magnetic Bearings Switch Mode Power Amplifier Cross-Coupling
André Niemann George van Schoor
School of Electrical, Electronic and Computer Engineering, North-West University 11 Hoffman Street, Potchefstroom, 2531 South Africa
国际会议
The Twelfth International Symposium on Magnetic Bearings(第十二届国际磁悬浮轴承学术会议)
武汉
英文
617-623
2010-08-22（万方平台首次上网日期，不代表论文的发表时间）