CPC H02P 21/06 (2013.01) [H02K 19/36 (2013.01)] | 9 Claims |
1. A positioning device for producing a position signal indicative of a rotational position of a resolver, the positioning device comprising:
a signal interface configured to receive a first alternating signal (V_cos) and a second alternating signal (V_sin), amplitudes of the first and second alternating signals being dependent on the rotational position of the resolver so that envelopes of the first and second alternating signals have a mutual phase shift, and
a processing system configured to generate the position signal based on the amplitudes of the first and second alternating signals and on polarity information indicative of a polarity of an excitation signal of the resolver,
wherein the processing system is configured to:
recognize a polarity indicator related to the polarity of the excitation signal on a waveform of at least the first alternating signal, and
determine the polarity information based on the recognized polarity indicator.
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