US 12,395,105 B2
Positioning device for producing a rotational position signal and an excitation device for producting 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 Apr. 24, 2023, as Appl. No. 18/305,622.
Application 18/305,622 is a division of application No. 16/806,530, filed on Mar. 2, 2020, granted, now 11,677,347.
Claims priority of application No. 19162090 (EP), filed on Mar. 12, 2019.
Prior Publication US 2023/0261596 A1, Aug. 17, 2023
Int. Cl. H02P 21/06 (2016.01); H02K 19/36 (2006.01)
CPC H02P 21/06 (2013.01) [H02K 19/36 (2013.01)] 13 Claims
OG exemplary drawing
 
1. An excitation device for producing an excitation signal (V_exc) for a resolver, the excitation device comprising:
a signal generator for generating the excitation signal, and
a signal interface for transmitting the excitation signal to the resolver,
wherein the excitation device further comprises a modulator for modulating operation of the signal generator so that a waveform of the excitation signal contains a polarity indicator expressing a polarity of a pulse of the excitation signal when the polarity indicator is detected on an output signal being the excitation signal multiplied with a gain having an unknown sign.