Patent ID: 11951685
Assignee: ZHUHAI SAILNER 3D TECHNOLOGY CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC B  H  G  Y | IPC B  G  H

Claim 8:
9. The servo motor drive circuit according to claim 1, wherein the drive signal in each pulse period comprises a pulse invalid level signal, a pulse valid level signal, and a pulse invalid level signal; and
the first comparing unit is configured to: determine a lower limit moment of a pulse valid duration and an upper limit moment of the pulse valid duration according to a preset duty ratio and the pulse period value, wherein the lower limit moment of the pulse valid duration is ½ of a product of the pulse period value and a difference between 1 and the preset duty ratio, and the upper limit moment of the pulse valid duration is ½ of a product of the pulse period value and a sum of 1 and the preset duty ratio; send the pulse invalid level signal to the servo motor when the timing duration is less than the lower limit moment of the pulse valid duration; send the pulse valid level signal to the servo motor when the timing duration is less than or equal to the upper limit moment of the pulse valid duration and greater than or equal to the lower limit moment of the pulse valid duration; and send the pulse invalid level signal to the servo motor when the timing duration is greater than the upper limit moment of the pulse valid duration.