Brushless direct current motor

Abstract

Abstract PURPOSE:To simplify the control wiring of the subject motor by a method wherein a rotation stopping control and a forward and reverse revolution control are performed using the control circuit provided inside the brushless DC motor. CONSTITUTION:The control circuit 15 is provided inside the transistor brushless motor. The rotating magnetic field generating and stopping circuit 17 gives ON and OFF positions to transistors 8-10 by receiving a position detecting signal from a rotor position detectors 12-14, and performs an ON-OFF control on the transistors 8-10 in the reverse direction when the outside switch 16 is in ON position. Also, when a rotor 11 has been rotated at the prescribed number of revolution, or when the interval of the position detecting signal has become larger than the fixed value due to overload, an abnormal signal is outputted from a rotation detecting circuit 18 or the position detection signal interval detecting circuit 19, and the transistors 8-10 are turned to OFF. Through these procedures, the outside control circuit can be simplified and the control wiring can also be simplified.

Inventors

• 👤 Keiichi Tokuyama
• 👤 Shotaro Naito

Bibliographic Details