Motor starting methods and apparatus using output voltage control based on source voltage
US10014804B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2017 |
| Grant date | Jul 3, 2018 |
| Priority date | — |
| Expiry date | Jul 7, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P1/28
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Methods of starting a motor include coupling the motor to an AC power source via a switching circuit of a motor starter, detecting an output voltage produced by the switching circuit and responsively changing the output voltage and detecting an input voltage from the AC power source and responsively controlling a rate of change of the output voltage. Controlling the rate of change of the output voltage may include reducing a rate of increase of a magnitude of the output voltage responsive to detecting that the input voltage meets a first criterion. The methods may further include bypassing the switching circuit to connect the motor to the AC power source responsive to the output voltage meeting a second criterion or an output current provided to the motor meeting a third criterion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.