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:
Jul. 22, 1997
Filed:
Sep. 26, 1995
Samsung Electronics Co., Ltd., Suwon, KR;
Abstract
A remote starting control circuit for a polyphase motor includes a controller, a zero-crosspoint detector, a power switch, a commutation circuit and a motor drive output circuit. The controller controls an excitation current applied to the motor. When the motor starts normally, it is accelerated in accordance with a detected zero-crosspoint. If the zero-crosspoint detector indicates that the motor has not started under optimal conditions, the controller adjusts a power-OFF interval and an excitation pulse width and re-starts the motor accordingly. Because of the ability to controllably adjust the starting of the motor under various excitation conditions, the motor can be started successfully without such problems as torque dead-point, head sticking and insufficient starting torque.