US 11,677,347 B2
Positioning device for producing a rotational position signal and an excitation device for producing an excitation signal for a resolver
Risto Tiainen, Lappeenranta (FI); and Matti Iskanius, Lappeenranta (FI)
Assigned to Danfoss Editron Oy, Lappeenranta (FI)
Filed by Danfoss Editron OY, Lappeenranta (FI)
Filed on Mar. 2, 2020, as Appl. No. 16/806,530.
Claims priority of application No. 19162090 (EP), filed on Mar. 12, 2019.
Prior Publication US 2020/0295686 A1, Sep. 17, 2020
Int. Cl. H02P 21/06 (2016.01); H02K 19/36 (2006.01)
CPC H02P 21/06 (2013.01) [H02K 19/36 (2013.01)] 9 Claims
OG exemplary drawing
 
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.