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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.:

US 10673360 B1

PDFFull Text
Date of Patent:
Jun. 02, 2020

Filed:

Feb. 12, 2019

Motor controller

Applicant:

Jtekt Corporation, Osaka-shi, Osaka, JP;

Inventors:

Koichiro Matsuhisa, Toyota, JP;

Hiroshi Sumasu, Kashihara, JP;

Assignee:

JTEKT CORPORATION, Osaka, JP;

Attorney:

Oliff PLC

Primary Examiner:

Bickey Dhakal

Assistant Examiner:

Zemenay T Truneh

Int. Cl.
CPC ...
B60H 1/32 (2006.01); H02P 7/29 (2016.01); H02K 11/33 (2016.01); B62D 5/04 (2006.01); G05B 11/28 (2006.01); H02P 6/08 (2016.01); H02M 1/00 (2006.01); H02M 7/5387 (2007.01); H02M 7/5395 (2006.01); H02P 27/08 (2006.01); H02M 7/44 (2006.01); H02M 1/12 (2006.01); H02K 7/14 (2006.01);
U.S. Cl.
CPC ...
H02P 7/2913 (2013.01); B62D 5/0406 (2013.01); B62D 5/0457 (2013.01); G05B 11/28 (2013.01); H02K 11/33 (2016.01); H02M 1/00 (2013.01); H02M 7/5395 (2013.01); H02M 7/53875 (2013.01); H02P 6/08 (2013.01); H02P 6/085 (2013.01); H02P 27/08 (2013.01); H02K 7/14 (2013.01); H02M 2001/123 (2013.01);
Abstract

A motor controller includes a motor drive circuit, a noise cancellation circuit, and a control unit. The motor drive circuit supplies electric power to an electric motor. The noise cancellation circuit includes an RLC circuit, a switch element, and a pull-down resistor. One end of the RLC circuit is electrically connected to a positive terminal of a power supply via the switch element, and the other end of the RLC circuit is electrically connected to a frame ground. A connection point between the RLC circuit and the switch element is electrically connected to a negative terminal of the power supply via the pull-down resistor. The control unit turns ON the switch element for a predetermined time at falling timings of phase voltages output from the motor drive circuit.

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