| 摘要 |
PROBLEM TO BE SOLVED: To provide a three-phase full-wave driver of 180-degree power feeding, which does not generate through-current during low noise drive of a fan motor to be applied to a home air-conditioner. SOLUTION: Three sets of upper and lower switching elements forming a pair with a PNP transistor and an NPN transistor are provided. Each instruction signal is applied to the base via a delay circuit, and electrical power is supplied to each coil of three-phase for 180 degrees with a power circuit 5, using respective collectors connected in common as the output terminals. As a result, a brushless motor driver, which does not generate a hazardous through- current and which assures high reliability, can be attained. |
