Method and device for controlling an electric motor propulsion unit with decoupled controls
US-9608553-B2 · Mar 28, 2017 · US
Motor operation failure detection
US8975845B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8975845-B2 |
| Application number | US-201113285907-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 31, 2011 |
| Priority date | Oct 31, 2011 |
| Publication date | Mar 10, 2015 |
| Grant date | Mar 10, 2015 |
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Abstract
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Systems and methods of detecting a failure of a permanent magnet synchronous motor system. A current of each phase coil of the motor is monitored. A value indicative of the power of the motor is compared to a threshold value indicative of power during a low power detection period. If the value indicative of the power fails to exceed the threshold value indicative of power for the entire low-power detection period, the system indicates a first error condition. The method also monitors the speed of the motor and indicates a second error condition if the speed of the motor remains below a speed threshold for an entire speed failure detection period. A third error condition is indicated if the current of at least one phase of the motor remains below a phase current threshold for an entire loss of phase detection period.
First claim
Opening claim text (preview).
What is claimed is: 1. A method of detecting a failure of a permanent magnet motor system comprising: monitoring a current of each phase of the permanent magnet motor system; repeatedly comparing a value indicative of power of the permanent magnet motor system to a threshold value indicative of power for a low power detection period; indicating a first error condition when the value indicative of power remains below the threshold value indicative of power for an entire low pow…
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Classifications
Electricity · mapped topic
Electricity · mapped topic
- H02P25/021Primary
Electricity · mapped topic
- H02P25/024Primary
Electricity · mapped topic
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- What does patent US8975845B2 cover?
- Systems and methods of detecting a failure of a permanent magnet synchronous motor system. A current of each phase coil of the motor is monitored. A value indicative of the power of the motor is compared to a threshold value indicative of power during a low power detection period. If the value indicative of the power fails to exceed the threshold value indicative of power for the entire low-pow…
- Who is the assignee on this patent?
- Guzelgunler Yilcan, Regal Beloit America Inc
- What technology area does this patent fall under?
- Primary CPC classification H02P25/021. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 10 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).