Motor control device and electric brake device using the same, and motor controlling method and electric brake controlling method using the same method
US-2022185250-A1 · Jun 16, 2022 · US
Electric brake apparatus
US12583428B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12583428-B2 |
| Application number | US-202117910164-A |
| Country | US |
| Kind code | B2 |
| Filing date | Mar 19, 2021 |
| Priority date | Apr 22, 2020 |
| Publication date | Mar 24, 2026 |
| Grant date | Mar 24, 2026 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
An electric brake apparatus includes an electric motor including driving circuits, a brake mechanism configured to press a braking member against a braking target member based on driving of the electric motor, and a control device configured to control the driving of the electric motor. The control device is configured to detect contact between the braking member and the braking target member based on a change in a current of the electric motor when power is supplied to a part of the driving circuits. A change amount of the current between before and after the braking member and the braking target member contact each other is larger when power is supplied to the part of the driving circuits than when power is supplied to all of the driving circuits.
First claim
Opening claim text (preview).
The invention claimed is: 1 . An electric brake apparatus comprising: an electric motor including driving circuits; a brake mechanism configured to press a braking member against a braking target member based on driving of the electric motor; and a control device configured to control the driving of the electric motor, wherein the control device is configured to supply power to a part of the driving circuits when all of the driving circuits are operating normally such that a gradient of a change in a current of the electric motor with respect to a thrust force for generating a braking force increases to detect contact between the braking member and the braking target member based on the change in the current of the electric motor. 2 . The electric brake apparatus according to claim 1 , wherein the control device is configured to supply power to only one of the driving circuits when all of the driving circuits are operating normally such that the gradient of the change in the current of the electric motor with respect to the thrust force for generating the braking force increases to detect contact between the braking member and the braking target member based on the change in the current of the electric motor. 3 . The electric brake apparatus according to claim 2 , wherein the electric motor has double windings.
Assignees
Inventors
Classifications
with friction brakes · CPC title
with parallel non-stationary axes, e.g. planetary gearing · CPC title
with parallel stationary axes, e.g. spur gears · CPC title
using motors · CPC title
Arrangements for monitoring working conditions, e.g. wear, temperature · CPC title
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- What does patent US12583428B2 cover?
- An electric brake apparatus includes an electric motor including driving circuits, a brake mechanism configured to press a braking member against a braking target member based on driving of the electric motor, and a control device configured to control the driving of the electric motor. The control device is configured to detect contact between the braking member and the braking target member b…
- Who is the assignee on this patent?
- Hitachi Astemo Ltd
- What technology area does this patent fall under?
- Primary CPC classification B60T13/746. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 24 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).