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:
Jan. 30, 2007
Filed:
Nov. 16, 2005
Alex Horng, Kaohsiung, TW;
Chung-ken Cheng, Kaohsiung, TW;
Alex Horng, Kaohsiung, TW;
Chung-Ken Cheng, Kaohsiung, TW;
Sunonwealth Electric Machine Industry Co., Ltd., Kaohsiung, TW;
Abstract
A PWM motor drive circuit includes a drive IC member, a Hall IC member, a PWM converter circuit and a capacitor. The drive IC member electrically connects with the Hall IC member, the drive IC member further includes a pin electrically connected with the PWM converter circuit. The capacitor connects in parallel between the pin of the drive IC member and the PWM converter circuit, and further connects with a power source to supply a voltage to the pin of the drive IC member. When the motor is started, the capacitor can prevent occurring zero volts at the pin of the drive IC member so that the drive IC member cannot unexpectedly enter a high-speed mode.