Patent ID: 11949363
Assignee: ROHM CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 18:
19. A method for driving a motor, the method comprising:
connecting a sense resistor in series with a first end of the motor;
generating a current feedback signal on a basis of a voltage drop in the sense resistor;
generating an error signal based on an error between the current feedback signal and a reference signal;
obtaining, by an analog-to-digital converter, a digital signal by converting the error signal to the digital signal;
generating a voltage command value corresponding to the digital signal;
converting the voltage command value to an analog control signal;
generating a first pulse by comparing the analog control signal with a first triangular wave, and generating a second pulse by comparing the analog control signal with a second triangular wave of a phase opposite to that of the first triangular wave; and
applying a first driving voltage corresponding to the first pulse and a second driving voltage corresponding to the second pulse to the motor, wherein,
during a first mode, in the generating the voltage command value, the digital signal obtained by the analog-to-digital converter at a negative edge timing of the first pulse is used for the digital signal at a positive edge timing of the second pulse.