Redundancy resolver device and electric power steering device

Patent metadata

Field	Value
Publication number	US-12034334-B2
Application number	US-201917442747-A
Country	US
Kind code	B2
Filing date	May 24, 2019
Priority date	May 24, 2019
Publication date	Jul 9, 2024
Grant date	Jul 9, 2024

Abstract

A resolver device with redundancy, wherein winding groups of different systems are arranged at different positions in a circumferential direction of a stator core. The winding groups of each system include: an excitation winding group consisting of a plurality of excitation windings, each of which is connected to a corresponding one of plural excitation circuits; and a first output winding group; and a second output winding group. Each of the stator teeth has a corresponding one of the excitation windings wound therearound. When two of the excitation windings belonging to different systems, arranged side by side in the circumferential direction of the stator core, are defined as a first end excitation winding and a second end excitation winding, respectively, the first end excitation winding and the second end excitation winding are supplied with excitation signals which generate magnetic fluxes in the same (not opposite) radial directions of the stator core.

First claim

The invention claimed is:

1. A redundancy resolver device, comprising:
a resolver main body including a stator, and a rotor rotatable with respect to the stator; and
a controller including a plurality of excitation circuits,
the stator including a stator core, and winding groups of a plurality of systems provided in the stator core,
the stator core including a core back portion, and a plurality of teeth which protrude from the core back portion,
the winding groups of different systems being arranged at different positions in a circumferential direction of the stator core,
the winding groups of each of the plurality of systems including:
an excitation winding group consisting of a plurality of excitation windings, and being connected to a corresponding one of the plurality of excitation circuits;
a first output winding group consisting of a plurality of first output windings; and
a second output winding group consisting of a plurality of second output windings,

each of the plurality of teeth having a corresponding one of the plurality of excitation windings wound therearound, and
where two of the plurality of excitation windings belonging to different systems and being arranged side by side in the circumferential direction of the stator core are defined as a first end excitation winding and a second end excitation winding, respectively, the first end excitation winding and the second end excitation winding are supplied with excitation signals to generate magnetic fluxes in the same radial directions of the stator core.

2. The redundancy resolver device according to claim 1 ,
wherein the first end excitation winding and the second end excitation winding are wound in the same direction, and
wherein the first end excitation winding is connected to its corresponding one of the plurality of excitation circuits in the same direction as a direction in which the second end excitation winding is connected to its corresponding one of the plurality of excitation circuits.

3. The redundancy resolver device according to claim 2 , wherein the stator core is formed by combining a plurality of arc-shaped divided cores.

4. The redundancy resolver device according to claim 2 , wherein the stator core consists of the same number of core blocks as the number of the plurality of teeth, and is transformable between a state in which the core blocks are arrayed in an annular shape, and a state in which the core blocks are developed in a straight line.

5. The redundancy resolver device according to claim 1 ,
wherein the first end excitation winding and the second end excitation winding are wound in opposite directions, and
wherein the first end excitation winding is connected to its corresponding one of the plurality of excitation circuits in an opposite direction to a direction in which the second end excitation winding is connected to its corresponding one of the plurality of excitation circuits.

6. The redundancy resolver device according to claim 5 , wherein the stator core is formed by combining a plurality of arc-shaped divided cores.

7. The redundancy resolver device according to claim 5 , wherein the stator core consists of the same number of core blocks as the number of the plurality of teeth, and is transformable between a state in which the core blocks are arrayed in an annular shape, and a state in which the core blocks are developed in a straight line.

8. The redundancy resolver device according to claim 1 , wherein the stator core is formed by combining a plurality of arc-shaped divided cores.

9. The redundancy resolver device according to claim 1 , wherein the stator core consists of the same number of core blocks as the number of the plurality of teeth, and is transformable between a state in which the core blocks are arrayed in an annular shape, and a state in which the core blocks are developed in a straight line.

10. An electric power steering device, comprising the redundancy resolver device of claim 1 .

Assignees

• Mitsubishi Electric Corp

Inventors

• Ikeda Hiroko
• Mori Tatsuya
• Motoyoshi Kenta
• Okazaki Kodai
• Ikeda Kenji
• Sugino Yosuke
• Sawada Seiji
• Kubo Kenta
• Matsunaga Toshihiro

Classifications

• H02K3/28

  Layout of windings or of connections between windings (windings for pole-changing H02K17/06, H02K17/14, H02K19/12, H02K19/32) · CPC title

• H02K1/16

  Stator cores with slots for windings · CPC title

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title

• G01D3/08

  with provision for safeguarding the apparatus, e.g. against abnormal operation, against breakdown · CPC title

• G01D3/036

  on measuring arrangements themselves · CPC title