Active snubber circuit for electrical rotary actuator

Details Active snubber circuit for electrical rotary actuator Active snubber circuit for electrical rotary actuator

H - Electricity

02

P

H02P 3/14 (2006.01) H02K 11/00 (2006.01) H02P 7/00 (2006.01)

Patent

CA 2347233

A novel motor driver with an active snubber circuit. The motor driver is interposed between an external electrical power source and an electrical motor. The electrical motor is driven in first and second states such that the electrical motor produces an inductive flyback current when it switches torque direction. The motor driver comprises a reverse voltage protector in series between the power source and the electrical motor allowing flow of electrical power to the motor; and a capacitor arranged in parallel circuit with the motor between the motor and the diode (or other reverse voltage protector). The active snubber circuit is in parallel circuit with the motor between the diode and the electrical motor. The active snubber circuit comprises a switch having a sensor responsive to increases in the bus voltage resulting from the inductive flyback current and a resistor in series with the switch regulating electrical current flow.

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