The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 16, 2017
Filed:
Apr. 23, 2013
Applicant:
Johnson Electric S.a., Murten, CH;
Inventors:
Yvan Bourqui, Corminboeuf, CH;
Miha Furlan, Bern, CH;
Assignee:
Johnson Electric S.A., Murten, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02K 37/14 (2006.01); H02K 7/06 (2006.01); H02K 7/106 (2006.01);
U.S. Cl.
CPC ...
H02K 37/14 (2013.01); H02K 7/06 (2013.01); H02K 7/106 (2013.01);
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.