Device and method for controlling rotary electric machine
US-11863107-B2 · Jan 2, 2024 · US
Motor drive circuit
US8941349B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8941349-B2 |
| Application number | US-201313860053-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 10, 2013 |
| Priority date | May 29, 2012 |
| Publication date | Jan 27, 2015 |
| Grant date | Jan 27, 2015 |
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Abstract
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A motor drive circuit includes: an advance angle setting correcting device having a correction reference cycle according to a reference advance angle count value, in which a correction amount is calculated as a ratio of the correction reference cycle to a cycle of a detection signal indicating a detected frequency proportional to a motor rotation speed, and in which an advance angle setting signal is obtained by multiplying the correction amount by a proportionality factor; and an advance angle setting device in which the advance angle correction value is added to the reference advance angle count value thereby outputting an advance angle setting signal, wherein a drive command signal containing a rotation speed information based on a target rotation speed is externally fed, the motor rotation speed is variably controlled in response to the drive command signal, and the detection signal is fed from a rotation speed detecting device.
First claim
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What is claimed is: 1. A motor drive circuit comprising: an advance angle setting correcting device which has a correction reference cycle predetermined according to a reference advance angle count value, in which a correction amount is calculated as a ratio of the correction reference cycle to a cycle of a detection signal indicating a detected frequency proportional to a rotation speed of a motor, and in which an advance angle setting signal is obtained in such a manner that the…
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Frequently asked questions
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- What does patent US8941349B2 cover?
- A motor drive circuit includes: an advance angle setting correcting device having a correction reference cycle according to a reference advance angle count value, in which a correction amount is calculated as a ratio of the correction reference cycle to a cycle of a detection signal indicating a detected frequency proportional to a motor rotation speed, and in which an advance angle setting sig…
- Who is the assignee on this patent?
- Minebea Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification H02P6/153. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jan 27 2015 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).