Patent ID: 9239027
Filing Date: 2016-01-19
CPC Classification: F02D,H02P

Claim Text:
1. A motor control device, comprising: an H-bridge circuit to control on/off of a current fed to a motor; a drive circuit to drive the H-bridge circuit; a drive command signal generator to generate a drive command signal comprising a pulse signal having predetermined drive frequency and duty for sending a command to drive the motor; a current detection circuit comprising a current detection resistor and a comparator connected in series with the motor and being operable to output a comparison output signal based on comparison between a current detection signal of a motor current and a target value signal; a latch circuit to hold a current detection result based on an ON signal of the drive command signal and the comparison output signal; a gate circuit to drive the drive circuit based on the ON signal of the drive command signal and a latch output signal from the latch circuit; and a control unit that changes the duty of the drive command signal outputted from the drive command signal generator based on the current detection result in the latch circuit.