Resolver and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9412516-B2
Application number	US-201313897494-A
Country	US
Kind code	B2
Filing date	May 20, 2013
Priority date	Nov 2, 2012
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

Provided is a method of manufacturing a resolver having a stator mounted around a rotator and configured to detect a rotational angle of a motor, the method including: forming the stator to have a core with protrusions disposed at a predetermined interval along a rotational direction of the rotator; winding a signal source coil around the protrusions of the core to generate an alternate current (AC) magnetic field when an input voltage signal is applied thereto; and winding a plurality of output signal coils alternately along the rotational direction of the rotator around the protrusions of the core, along the rotational direction of the rotator, to generate induced voltage signals of different phases in response to the AC magnetic field generated by the signal source coil and the rotation of the rotator.

First claim

What is claimed is:

1. A resolver configured to detect a rotational angle of a motor comprising:
a rotator;
a stator mounted around the rotator and comprising a core having protrusions disposed at a predetermined interval along a rotational direction of the rotator;
a signal source coil wound around the protrusions of the core and configured to generate an alternate current (AC) magnetic field when an input voltage signal is applied thereto; and
a plurality of output signal coils wound around protrusions of the protrusions of the core in an alternating manner along the rotational direction of the rotator,
wherein the plurality of output signal coils comprise the same number of turns around the protrusions,
wherein the same number of turns is obtained by the equation Nip=2 Nt/Z,
where Nip denotes the same number of turns of the each of the plurality of output signal coils, Nt denotes a total number of turns of the output signal coil and Z denotes a number of protrusions of the core,
wherein the plurality of output signal coils comprise:
a first output signal coil wound around odd-numbered protrusions along the rotational direction of the rotator; and
a second output signal coil wound around even-numbered protrusions along the rotational direction of the rotator, and

wherein the first output signal coil wound around odd-numbered protrusions at a first position along a radial direction of the plurality of the protrusions, and the second output signal coil wound around even-numbered protrusions at a second position different from the first position along the radial direction of the plurality of the protrusions.

2. The resolver of claim 1 , wherein the rotator of the resolver is configured to rotate with respect to a rotator axis of the motor and rotate with a rotator of the motor.

3. The resolver of claim 1 , wherein the rotator of the resolver comprises repetitive curvatures on the circumferential surface in the rotational direction of the rotator.

4. The resolver of claim 3 , wherein the rotator further comprises a plurality of protruded polarities oriented towards the protrusions of the core along the repetitive curvatures.

5. The resolver of claim 1 , wherein the first output signal coil is configured to generate a first induced voltage signal in response to the AC magnetic field generated by the signal source coil and a rotation of the rotator,
the second output signal coil is configured to generate a second induced voltage signal in response to the AC magnetic field generated by the signal source coil and the rotation of the rotator, and
the first output signal coil and the second output signal coil provide a phase difference of 90° between the first induced voltage signal and the second induced voltage signal.

6. The resolver of claim 1 , wherein the signal source coil is wound around each of the protrusions of the core by the same number of turns, and
wherein a total number of turns for each of the protrusions of the core is the same.

7. The resolver of claim 1 , wherein a number of protrusions of the core is proportional to a value obtained by multiplying a number of the output signal coils by a number of protruded polarities of the rotator.

Assignees

• Hanwha Techwin Co Ltd

Inventors

• Jin Chang-Sung
• Park Yong-Ho
• Lee Jin-Ju

Classifications

• G01D5/2086

  by movement of two or more coils with respect to two or more other coils · CPC title

• G01D3/036

  on measuring arrangements themselves · CPC title

• H01F41/06 Primary

  Coil winding · CPC title

• G01D5/2066

  by movement of a single coil with respect to a single other coil · CPC title

• G01D5/2046 Primary

  by a movable ferromagnetic element, e.g. a core · CPC title