CIRCUIT OF STEP MOTOR ACTUATOR AND METHOD OF CONTROLLING STEP MOTOR ACTUATOR Russian patent published in 2009 - IPC H02P8/00 

FIELD: electrical engineering.

SUBSTANCE: proposed circuit of an actuator of a step motor employs a processor, which generates a pulse width modulated signal at the output. The circuit of the actuator has an H-bridge circuit, with first and second inputs, and a switching circuit, with an input and an output. The first input of the H-bridge and the input of the switching circuit are connected to the pulse width modulated signal output of the processor. The output of the switching circuit is connected to the second input of the H-bridge. The switching circuit inverts the duty factor of the pulse width modulated signal when the latter is present, and does not if absent.

EFFECT: reduced operation noise of the motor.

25 cl, 4 dwg