Patent ID: 11942834
Assignee: ZENG HSING INDUSTRIAL CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  D | IPC D  H

Claim 8:
9. A motor drive method that is to be performed by a modulator circuit which is electrically connected to a rectifier circuit to receive a DC voltage, and which is electrically connected to a direct current (DC) motor via a positive output terminal and a negative output terminal, the modulator circuit including a pulse generation module, a feedback determination module, a pulse modulation module and a driving module including a switch, the motor drive method comprising steps of:
A) by the driving module, generating a feedback signal based on a source current of the switch, and outputting the feedback signal to the feedback determination module;
B) by the feedback determination module, generating a feedback determination signal based on the feedback signal received from the driving module, and outputting the feedback determination signal to the pulse modulation module;
C) by the pulse modulation module, receiving an original pulse signal from the pulse generation module, generating a modulated pulse signal having a modulated duty cycle based on the original pulse signal and based on the feedback determination signal received from the feedback determination module, and outputting the modulated pulse signal to the driving module; and
D) by the driving module, modulating the DC voltage based on the modulated pulse signal to generate a modulated DC driving signal an average voltage of which has a positive correlation with the modulated duty cycle, and outputting the modulated DC driving signal via the positive output terminal and the negative output terminal to the DC motor, in order to drive the DC motor to operate at a rotational speed corresponding to the modulated DC driving signal.