Control device for brushless motor

Abstract

Abstract PURPOSE:To improve the stability, by detecting the induced voltage of stator coils by operation based on the terminal voltage, neutral point voltage and current of the stator coils. CONSTITUTION:A control device of a brushless motor 29 is composed of a DC power source 11, capacitors 14-15 provided between the bus bars 12-13, an inverter 16 as an output means, an arithmetic circuit 37, etc. Abovementioned motor 29 is equipped with a stator 30 and a permanent magnet rotor 31. Induced voltage detection circuits 33U-33W, current detectors 34U-34W, and the above arithmetic circuit 37 are composed of a comparison circuit 35 and a logic circuit 36. Let the output signal of these detection circuits 33U-33W be compared 35 and logically operated 36 to serves as a conductive signal and the conduction to stator coils 30U-30W is performed. The motor 29 can thereby be controlled without time lag.

Inventors

• 👤 Kazunobu Nagai
• 👤 Masami Hirata

Bibliographic Details