Patent ID: 6738239
Filing Date: 2004-05-18
Classification: H02P

Abstract:
A motor driver interposed between an electrical power source and a limited angle torque electrical, motor driven in first and second states, the electrical motor adapted to produce an inductive flyback current when switching between states, comprisinga reverse voltage protector in series with the electrical power source and the limited angle torque electrical motor allowing proper flow of electrical power to the limited angle torque electrical motor; a capacitor arranged in arranged in parallel circuit with the limited angle torque electrical motor between the limited angle torque electrical motor and the reverse voltage protector, the capacitor having a capacitance of between 5 &mgr;F and 500 &mgr;F, the capacitor subject to a high temperature; and an active snubber circuit arranged in parallel circuit with the limited angle torque electrical motor, between the reverse voltage protector and the limited angle electrical motor, the active snubber circuit comprising a switch having a sensor responsive to an increase in the bus voltage and a resistor in series with the switch for regulating electrical current flow.