Method and apparatus for detecting motor error of motor driven power steering
US-9421998-B2 · Aug 23, 2016 · US
Motor Control Circuit
US2016142003A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016142003-A1 |
| Application number | US-201414896457-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jun 4, 2014 |
| Priority date | Jun 7, 2013 |
| Publication date | May 19, 2016 |
| Grant date | — |
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Abstract
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A motor control circuit for an electric motor of an electric power assisted steering system comprises a switching circuit comprising a plurality of electrical switches, a current demand signal generator which converts the torque demand signal into a current demands signal; and a fault mode motor current controller that is responsive to an error signal that represents the difference between the current demand signal and the actual current flowing in the motor and is operable in the event of a fault where one phase is open-circuit to drive the remaining two phases as a single combined phase by generating a single voltage demand signal that is representative of the voltage to be applied across the combined phases, the voltage signal being in turn fed into a drive circuit for the switches that generates pulse width modulated switching signals for the switching circuit required to apply the voltage across the combined phases.
First claim
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1 . A motor control circuit for an electric motor of an electric power assisted steering system in which a measurement of torque carried by a part of the steering system is used to produce a torque demand signal indicative of a torque to be applied to the steering system by the motor, the circuit comprising: a switching circuit comprising a plurality of electrical switches, a current demand signal generator which converts the torque demand signal into a current demand signal; a fault mode m…
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- H02P29/0243Primary
Electricity · mapped topic
Operations & Transport · mapped topic
Electricity · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
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Frequently asked questions
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- What does patent US2016142003A1 cover?
- A motor control circuit for an electric motor of an electric power assisted steering system comprises a switching circuit comprising a plurality of electrical switches, a current demand signal generator which converts the torque demand signal into a current demands signal; and a fault mode motor current controller that is responsive to an error signal that represents the difference between the …
- Who is the assignee on this patent?
- Trw Ltd
- What technology area does this patent fall under?
- Primary CPC classification H02P29/0243. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu May 19 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).