Linear actuator
US9653981B2 · kind B2 · utility
0Cited by
17References
21Claims
0Family size
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Key dates
| Filing date | Apr 23, 2013 |
| Grant date | May 16, 2017 |
| Priority date | — |
| Expiry date | Sep 29, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K7/106
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A linear actuator with a high holding force providing good irreversibility, has a high efficiency, low friction screw mechanism and a stepper motor with high magnetic detent torque but a low output torque ripple. The phase torque is modified to minimize the effect of the detent torque on the output. torque. Preferably, the motor has asymmetric phases to compensate for the detent torque.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.