Method and system of limiting current to a motor
US9030143B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 31, 2011 |
| Grant date | May 12, 2015 |
| Priority date | — |
| Expiry date | Jul 8, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P29/02
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of limiting current to a motor. The method comprising monitoring a speed of a motor, an input voltage of a controller, and a temperature of the controller. Determining a maximum current limit for the motor based on the monitored speed when the motor speed is below a speed threshold. Determining a maximum current limit for the motor based on the input voltage and the temperature when the motor speed is above the speed threshold and the input voltage is below an input voltage threshold. Determining a maximum current limit for the motor based on the temperature when the motor speed is above the speed threshold and the input voltage is above the input voltage threshold. Or determining a maximum current limit for the motor based on the monitored speed when the motor speed is above the speed threshold and the temperature is below a temperature threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.