Linear motor door actuator
US7626348B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2006 |
| Grant date | Dec 1, 2009 |
| Priority date | — |
| Expiry date | May 14, 2028 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE05F15/60
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
The present invention relates to an alternating current electrical motor having a first element with magnets of alternating polarities, and a second element with electrical conductor coils, the first and the second elements being mounted for relative motion to one another. A controller for the electrical motor comprising: a current source for energizing the coils with an alternating current to produce a movement of the first and the second elements relative to one another; a sensor for sensing a phase shift between the magnets and the current in the coils; and a current source controller for varying an amplitude of the current to substantially regulate the phase shift to an optimum phase shift value, thereby providing a minimum power consumption for proper operation of the electrical motor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.