Patent Number: 6,528,968

Title: Brushless-motor driver in PWM mode

Abstract: In a driver of a brushless motor performing synchronous rectification PWM operation, switching is performed at an arbitrary timing between a synchronous rectification PWM operation and one-way PWM operation to prevent a negative current for the power supply, and thus preventing increase of a power supply voltage due to the negative current, thereby implementing high performance and high reliability.

Inventors: Seima; Toshiaki (Tottori-ken, JP), Iwayama; Yoshiaki (Osaka-fu, JP)

Assignee: Matsushita Electric Industrial Co., Ltd.

International Classification: H02P 6/08 (20060101); H02P 005/40 ()

Expiration Date: 03/04/2020