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Position sensorless control of reluctance and permanent magnet synchronous machines at zero and low speed is possible using HF voltage injection and proper demodulation. The so-called saliency position, which is tracked by the HF sensorless scheme, is different from the actual rotor position: the difference contains both offset and rotor-position-varying components, which may be explained by carefully...
Optimally designed interior permanent magnet synchronous machines using finite element software, and control of such machines using powerful digital signal processing controllers, is common-place today. With field orientated control, the maximum torque per ampere control strategy for unsaturated voltage conditions (below base speed) is well known; the field weakening strategy however, can be rather...
Position sensorless control of reluctance- and PM synchronous machines at zero and low speed is possible using high frequency voltage injection and proper demodulation. The so-called anisotropy position, which is tracked by the HF sensorless scheme, is different to the actual rotor position: the difference contains both offset and time-varying components, which may be explained by carefully considering...
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