Power limiting for motor current controllers
US9634603B2 · kind B2 · utility
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18Claims
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Key dates
| Filing date | Aug 24, 2015 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | Nov 4, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A motor controller a pulse-width modulation (PWM) circuit, a power limit circuit, and an inverter. The PWM circuit is configured to output initial count outputs based on a current command. The power limit circuit includes a peak current detector, a divider, and a dynamic limiter. The power limit circuit is configured to provide updated count outputs based on the initial count outputs, a sensed current, and a power threshold. The inverter is controlled by the updated count outputs and configured to provide output power to a motor. The sensed current is sensed from the output power to the motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.