Motor drive apparatus
US-9455610-B2 · Sep 27, 2016 · US
Rotation angle detection device
US2016352190A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016352190-A1 |
| Application number | US-201615157977-A |
| Country | US |
| Kind code | A1 |
| Filing date | May 18, 2016 |
| Priority date | May 25, 2015 |
| Publication date | Dec 1, 2016 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A rotation angle detection device detects a rotation angle of a motor having a shaft passing through a heat-dissipation plate. The rotation angle detection device includes: a permanent magnet attached to a base end of the shaft; a board that is disposed above the heat-dissipation plate and on which a drive circuit of the motor and a control circuit of the drive circuit are mounted; a magnetic sensor that is provided on the board so as to face the permanent magnet; and a magnetic shielding member that has a tubular shape and is disposed between the heat-dissipation plate and the board to surround the permanent magnet in plan view.
First claim
Opening claim text (preview).
What is claimed is: 1 . A rotation angle detection device that detects a rotation angle of a motor having a rotary shaft passing through a metal plate, the rotation angle detection device comprising: a permanent magnet attached to one end of the rotary shaft; a board that faces the metal plate on the opposite side of the permanent magnet from the metal plate and on which at least one of a drive circuit of the motor and a control circuit of the drive circuit is mounted; a magnetic sensing element that is provided on the board so as to face the permanent magnet; and a magnetic shielding member that has a tubular shape and is disposed between the metal plate and the board so as to surround the permanent magnet in plan view. 2 . The rotation angle detection device according to claim 1 , wherein the board includes an engagement portion that engages with a board-side end of the magnetic shielding member. 3 . The rotation angle detection device according to claim 2 , wherein the engagement portion is a recess into which the board-side end of the magnetic shielding member is fitted. 4 . The rotation angle detection device according to claim 1 , wherein the magnetic shielding member is integrated with the metal plate. 5 . The rotation angle detection device according to claim 1 , wherein a ground wire is formed on the board, and the magnetic shielding member is electrically connected to the ground wire.
Assignees
Inventors
Classifications
influenced by the relative movement between the Hall device and magnetic fields (see G01R33/06) · CPC title
by mechanical means · CPC title
- H02K11/215Primary
Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements · CPC title
Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title
Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection (casings, enclosures or supports H02K5/00) · CPC title
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- What does patent US2016352190A1 cover?
- A rotation angle detection device detects a rotation angle of a motor having a shaft passing through a heat-dissipation plate. The rotation angle detection device includes: a permanent magnet attached to a base end of the shaft; a board that is disposed above the heat-dissipation plate and on which a drive circuit of the motor and a control circuit of the drive circuit are mounted; a magnetic s…
- Who is the assignee on this patent?
- Jtekt Corp
- What technology area does this patent fall under?
- Primary CPC classification H02K11/215. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Dec 01 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).