Motor voltage synthesis in reduced voltage soft starters and motor starters employing the same
US11863091B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 8, 2022 |
| Grant date | Jan 2, 2024 |
| Priority date | — |
| Expiry date | Apr 8, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02P2207/01
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A reduced voltage soft starter (RVSS) includes a switching circuit configured to selectively couple an AC power source to a motor and a control circuit configured to sense a line voltage provided to the switching circuit to produce a first voltage signal, to sense a current of the motor to generate a current signal and to generate a second voltage signal representative of a voltage of the motor responsive to the first voltage signal and the current signal. The control circuit may be further configured to generate an estimate of a torque of the motor responsive to the second voltage signal and to control the torque of the motor responsive to the torque estimate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.