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:
May. 05, 1998
Filed:
May. 29, 1996
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A driving apparatus of an induction motor applied for drive of a fan of an air conditioner has a voltage limiter unit for limiting an upper limit of an output voltage of an inverter circuit, a voltage slow-up unit for converting an output signal of an output voltage commanding unit into a signal which increases gradually when that output signal rises, a voltage slow-down unit for converting the output signal of the output voltage commanding unit into a signal which decreases gradually when that output signal falls, and a feed interruption processing unit for setting the output signal value of the output voltage commanding unit to 0 when interrupting feeding and delivering a feed interruption signal at the termination of the lapse of a predetermined time.