Patent ID: 6335598
Filing Date: 2002-01-01
Classification: H02P

Abstract:
A brushless motor system comprising:a brushless motor having a rotor; a sensing circuit for detecting the rotor position, the sensing circuit having: a Hall sensor having two output ports; wherein as the rotor rotates, the Hall sensor will generate a sensing signal at each of the two output ports; and a capacitor device for each of the two output ports of the Hall sensor, the capacitor device connected in series with the output port; an ON-OFF device connected to the capacitor device; a control circuit for controlling an ON-OFF state of the ON-OFF devices; and a motor driver connected to the two capacitor devices for driving the rotor of the brushless motor according to the two sensing signals from the two capacitor devices; wherein when the state of an ON-OFF device is ON, the sensing signal is sent to the motor driver through the ON-OFF device; when the state of the ON-OFF device is OFF, the sensing signal is sent to the motor driver through the capacitor device.