Motor actuator with torque control
US7005818B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 26, 2002 |
| Grant date | Feb 28, 2006 |
| Priority date | — |
| Expiry date | Apr 19, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02H7/0855
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
In a motor actuator, e.g., a valve actuator, comprising a reversible electrical motor, a drive circuit is providing a stop function, when the torque of the motor exceeds a predetermined maximum torque. The drive circuit is constructed as a two-terminal circuit connected in series with the reversible electrical motor, and the electrical power is supplied to the series connection with a mainly fixed voltage VCC and a polarity which provides the desired rotational direction of the motor. This provides the possibility of having the drive circuit positioned close to the motor and maintaining full torque control and stop function with two wire connections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.