Back EMF monitor for motor control
US9575473B2 · kind B2 · utility
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2Claims
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Key dates
| Filing date | Aug 7, 2015 |
| Grant date | Feb 21, 2017 |
| Priority date | — |
| Expiry date | Aug 7, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P7/29
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An integrated circuit includes a motor current input voltage-to-current (VI) converter that receives a motor current sensor voltage from a motor and a reference voltage to generate an output current related to a motor's current. A motor current calibration VI converter compensates for errors in the motor current input VI converter and generates a calibration output current based on the reference voltage, wherein the output current and the calibration output current are combined to form an estimate of the motor's current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.