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The paper discusses electromagnetic parameters of a novel arrangement of a permanent magnet biased radial active magnetic bearing with three poles. The control currents of the three poles produce a heteropolar distribution of the magnetic field whereas the permanent magnets cause a homopolar configuration of the magnetic field. Thus, 3D finite element analyses have to be used to accurately obtain...
This paper presents a method for sensorless control of radial active magnetic bearings. Self-sensing methods are based on position estimation by electrical parameters as current and voltage signals. A novel bearing design which has only three stator coils in star connection for high economic manufacturing and permanent magnet biasing for low operational costs is used. Combining a standard three phase...
A novel design of a radial active magnetic bearing with a permanent magnet bias flux will be presented. The arrangement with only three stator coils allows for an utilization of a standard three phase voltage source inverter. The control coils themselves will be used for the detection of the rotor position with two degrees of freedom. Hence, no external position sensor has to be used resulting in...
Permanent magnet synchronous machines with an external rotor nowadays gain in significance for high performance electrical drive systems such as with hybrid electric vehicles. With these applications, the machine will operate in a wide speed range and on the other hand with very fast changing loads in both motor and generator operational modes. In order to achieve a robust machine design, a position-sensorless...
This paper discusses finite element analyses of a skewed permanent magnet synchronous machine (PMSM) with an external rotor regarding the magnetic saliency. Since the machine is fed from a voltage source inverter (VSI), a simulation as close as possible to the regular operational behavior is intended. Therefore, a voltage-driven finite element model with a strong circuit coupling excited with the...
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