| 摘要 |
PROBLEM TO BE SOLVED: To provide a motor driver, which improves power efficiency and rotation characteristics, in a motor driver which controls all currents, flowing into a motor, by controlling the duty ratio of the on/off of the switching element which is connected between a power source and the motor. SOLUTION: This motor driver is provided with comparators 3-1, 3-2, and 3-3, which compare drive signals D1, D2, and D3 being the signals in sine wave form 5, synchronized with the rotation of the motor M which are outputted from a signal synthesizing circuit 2 with the triangular waves T being outputted from an oscillation circuit 4, and output pulse signals P1, P2, and P3 which show comparison results, and switches the switching elements inside the output circuits 5-1, 5-2, and 5-3 with the pulse signals P1, P2, and P3. |
