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:
Jun. 17, 2003
Filed:
Jun. 27, 2000
Shigenobu Sekiya, Saitama, JP;
Hisao Asaumi, Saitama, JP;
Takashi Kuribayashi, Saitama, JP;
Kouji Tsuchiya, Saitama, JP;
Honda Giken Kabushiki Kaisha, Tokyo, JP;
Abstract
In separately excited DC brush motors ML and MR, an armature current control circuit for feeding power to armatures and a field current control circuit for feeding power to a field system form separate systems and are independently controllable except that both the control circuits share a battery B between them. When the overrotation of the motors ML and MR is detected from the backflow of an armature current and a rise in the voltage of the battery B or when the reverse rotation of the motors ML and MR is detected from an increase in the armature current and a decrease in PWM for the armature current, the generation of counter electromotive force is restrained by reducing the field current of the motors ML and MR so as to prevent the armature current control circuit from being damaged.