Actuator with residual magnetic hysteresis reset
US9932947B2 · kind B2 · utility
5Cited by
6References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 10, 2015 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | Aug 21, 2036 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF02D2041/2072
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electromagnetic actuation system includes an electrical coil, a magnetic core, an armature, a controllable bi-directional drive circuit for selectively driving current through the coil in either of two directions, and a control module providing an actuator command to the drive circuit. Current is driven though the electrical coil in a first direction when an actuation is desired. When the actuation is not desired current is driven through the electrical coil including in a second direction sufficient to reduce residual flux within the actuator below a level passively attained within the actuator at zero coil current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.