High-Speed Electrical Machine with Active Magnetic Bearing System Optimization

Analysis of Vibration Characteristics of PD Control Active Magnetic Bearing and Cracked Rotor System (RESEARCH NOTE)

Crack fault of rotor is one of the most prominent problems faced by magnetic bearing rotor system. In order to improve the safety performance of this kind of machinery, it is necessary to research the vibration characteristics of magnetic bearing cracked rotor system. In this paper, the stiffness model of the crack shaft element was established by the strain energy release rate (SERR) theory. T...

μ Control of a High Speed Spindle Thrust Magnetic Bearing

Experimental results demonstrate that μ synthesis provides an excellent tool for increasing the dynamic stiffness of thrust magnetic thrust bearings. Accurate system modeling and appropriate uncertainty descriptions are critical to obtaining such results and are described in detail. Both complex μ and mixed μ synthesis were used to design controllers. The performance of the μ controllers is com...

High-Speed Reclosing System and Machine Considerations

Experiences using RT-Linux to Implement a Controller for a High Speed Magnetic Bearing System

Control systems based on embedded DSP boards often require specialized programming and development tools, lack interoperability with standardized architectures and tools, lack flexibility when computational requirements change, and are often relatively expensive. A potentially attractive alternative is to implement the control system using RT-Linux, a free modification to Linux intended to supp...

Analysis of a Combined Radial-axial Magnetic Bearing for a High-speed Drive System

High-speed and high-power-density drives are attracting much interest in today’s industry, e.g. for applications with mesoscale gas turbine generator systems or turbocompressors for fuel cells. In all high-speed machinery the bearing is a key component. Therefore, this paper presents the analysis of an active magnetic bearing suitable for a permanent magnet machine, being part of a high-speed e...