发明名称 |
Rotor position detection at standstill and low speeds using a low power permanent magnet machine |
摘要 |
For a multiphase alternating current (AC) wound field synchronous machine (WFSM) that has a stator with a selected number of poles, the WFSM having an associated exciter and multiphase AC permanent magnet machine (PMM) directly coupled to the WFSM, a method of sensing the position of a rotor in the WFSM comprises the steps of: configuring a stator for the PMM to have a number of poles that is a sub-multiple of the selected number of WFSM stator poles; configuring a rotor for the PMM to have high saliency; applying multiphase AC power of a selected frequency to the PMM stator: detecting at least one set of stator harmonic currents of the multiphase AC power resulting from the rotor saliency; converting the detected PMM harmonic stator currents from their multiphase coordinates to alphabeta coordinates; rotating the converted PMM stator currents into a reference frame for at least one selected harmonic to generate alphabeta coordinate harmonic current vectors; and estimating the position of the WFSM rotor based on the values of the alphabeta coordinate harmonic current vectors in the selected harmonic reference frame.
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申请公布号 |
US2008315822(A1) |
申请公布日期 |
2008.12.25 |
申请号 |
US20070820640 |
申请日期 |
2007.06.20 |
申请人 |
MADDALI VIJAY K;MARKUNAS ALBERT L |
发明人 |
MADDALI VIJAY K.;MARKUNAS ALBERT L. |
分类号 |
H02P23/14;H02P23/03 |
主分类号 |
H02P23/14 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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