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:
Apr. 20, 1999
Filed:
May. 30, 1997
Sang-Yeon Pyo, Yongin, KR;
Samsung Electronics Co., Ltd., Suwon, KR;
Abstract
This invention provides a driving circuit for a switched reluctance motor(SRM) comprising a current sensing unit which senses current amount flowing into a driving circuit of the SRM and outputs a signal representing current amount flowing in the driving circuit, a comparing unit which compares a reference current amount with current amount flowing in the driving circuit in response to the output signal from the current sensing means, and outputs a stop signal in case the current amount flowing in the driving circuit of the SRM exceeds the reference current amount, and a signal selecting unit which receives output signal from the comparing means, a Pulse Width Modulated(PWM) signal and a rotor position signal, and outputs a gate controlling signal for turning off the switching element during an input of the stop signal from the comparing means. The protection of the driving circuit against the excess current according to the present invention improves reliability of the SRM, as well as eliminates the ripple component in the driving current(torque ripple) generated at the time of an initial start-up of each phase, which reduces loud noise of the motor.