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US 5,705,872 AGranted
Brushless resolver
AssigneeSiemens Aktiengesellschaft
InventorHans Loge
Life of this patent
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Abstract
A brushless resolver having a stator and a rotor, and a resolver part axially displaced to one another and a transformer part and having associated windings is provided. An additional short-circuited winding arranged parallel with the transformer rotor winding with few turns on the iron core thereof is also provided. A lowpass filter is thereby formed, which compensates the unwanted frequency-dependent phase displacement between the input voltage and the output voltages for the respective frequency.
Claims7
A brushless resolver having a stator and a rotor, comprising:
- a resolver part having at least two stator windings and at least one rotor winding arranged on the stator and rotor;
- a transformer part displaced axially relative to the resolver part, the transformer part having a transformer stator winding and a transformer rotor winding, each having a number of turns;
- and
- a short-circuited winding arranged in the rotor as a wire winding parallel to the transformer rotor winding on an iron core thereof, wherein the short-circuited winding has a number of turns and a wire diameter selected so as to form a lowpass filter to compensate the phase displacement of the resolver at the operating frequency.
1 more element
Dependencies are inferred from the claim text.