Title:
ROTARY TRANSFORMER
Document Type and Number:
WIPO Patent Application WO/2020/001552
Kind Code:
A1
Abstract:
Provided by the present application is a rotary transformer, comprising: a stator, including a stator core and an input winding and an output winding wound around the stator core; a plurality of stator slots are formed on the inner side wall of the stator core, and the plurality of stator slots are distributed in a circumferential direction and respectively cause two ends of the stator core to be connected so that stator teeth are formed between any two adjacent stator slots to respectively wind the input winding and the output winding; a rotor, including a rotor core; an air gap is defined between the inner side wall of the stator core and the outer side wall of the rotor core; when the rotor rotates, the length δ of the air gap, along the circumferential direction, and a mechanical rotation angle θ of the rotor satisfy a sinusoidal function relationship containing third-harmonic components, and periodic changes are performed according to the functional relationship to define the shape of the rotor core. According to the technical solution of the present application, the output signal amplitude and position measurement accuracy of the rotary transformer can be improved under the same maximum and minimum air gaps.
Inventors:
GE XIAO (CN)
WAN JIA (CN)
WAN JIA (CN)
Application Number:
PCT/CN2019/093345
Publication Date:
January 02, 2020
Filing Date:
June 27, 2019
Export Citation:
Assignee:
GUANGDONG WELLING AUTO PARTS CO LTD (CN)
International Classes:
H02K24/00; G01D5/20
Foreign References:
| CN208608878U | 2019-03-15 | |||
| CN206250940U | 2017-06-13 | |||
| CN104184236A | 2014-12-03 | |||
| US5763976A | 1998-06-09 |
Other References:
See also references of EP 3799277A4
Attorney, Agent or Firm:
YOULINK INTELLECTUAL PROPERTY LAW FIRM (CN)
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