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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 10104834 B1

PDFFull Text
Date of Patent:
Oct. 23, 2018

Filed:

Jun. 01, 2017

Electric lawn mower control apparatus

Applicant:

Honda Motor Co., Ltd., Tokyo, JP;

Inventors:

Toru Yuki, Wako, JP;

Yoshihiko Yamagishi, Wako, JP;

Shinsaku Nakayama, Wako, JP;

Assignee:

HONDA MOTOR CO., LTD., Tokyo, JP;

Attorney:

Duft & Bornsen, PC

Primary Examiner:

Robert E Pezzuto

Int. Cl.
CPC ...
A01D 34/00 (2006.01); A01D 34/58 (2006.01); A01D 34/78 (2006.01); A01D 34/68 (2006.01); A01D 34/82 (2006.01); G01P 3/44 (2006.01); G01R 31/36 (2006.01); H01M 10/0525 (2010.01); H01M 10/44 (2006.01); H01M 10/48 (2006.01); H02J 7/00 (2006.01); H02J 7/14 (2006.01); H02P 27/08 (2006.01); B60L 7/14 (2006.01); H02P 3/22 (2006.01); A01D 101/00 (2006.01); B60R 16/04 (2006.01);
U.S. Cl.
CPC ...
A01D 34/006 (2013.01); A01D 34/6806 (2013.01); A01D 34/78 (2013.01); A01D 34/82 (2013.01); B60L 7/14 (2013.01); G01P 3/44 (2013.01); G01R 31/3606 (2013.01); H01M 10/0525 (2013.01); H01M 10/44 (2013.01); H01M 10/486 (2013.01); H02J 7/0068 (2013.01); H02J 7/1438 (2013.01); H02P 3/22 (2013.01); H02P 27/08 (2013.01); A01D 2101/00 (2013.01); B60R 16/04 (2013.01); B60Y 2300/18125 (2013.01); H01M 2220/20 (2013.01);
Abstract

An apparatus for controlling operation of a walk-behind electric lawn mower equipped with an electric motor, a blade cutter connected to the electric motor and a rechargeable battery mounted connected to the electric motor and a motor driver circuit. In the apparatus, when an instruction to stop the electric motor is inputted, the operation of the motor driver circuit is controlled to output regenerative electric current from three-phase coils of the electric motor. At that time, it is determined whether a rotational speed of the electric motor is equal to or less than a switching rotational speed and when it is, the motor driver circuit is controlled to switch from the regenerative braking to short-circuit braking that short-circuits the three-phase coils of the electric motor.

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