US 12,445,017 B2
Motor driver using spread spectrum mechanism for reducing electromagnetic interference
Ming-Jung Tsai, Changhua County (TW)
Assigned to ANPEC ELECTRONICS CORPORATION, Hsinchu (TW)
Filed by ANPEC ELECTRONICS CORPORATION, Hsinchu (TW)
Filed on Jan. 26, 2024, as Appl. No. 18/423,487.
Claims priority of application No. 112141173 (TW), filed on Oct. 27, 2023.
Prior Publication US 2025/0141311 A1, May 1, 2025
Int. Cl. H02P 6/12 (2006.01); H02K 11/02 (2016.01); H02K 11/33 (2016.01); H03K 7/06 (2006.01); H04B 1/715 (2011.01)
CPC H02K 11/02 (2013.01) [H02K 11/33 (2016.01); H03K 7/06 (2013.01); H04B 1/715 (2013.01); H04B 2001/7154 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A motor driver using a spread spectrum mechanism for reducing electromagnetic interference, comprising:
a waveform frequency modulating circuit configured to generate a plurality of waveforms in each of a plurality of on-time signals and to output the plurality of on-time signals; and
a motor driving circuit connected to the waveform frequency modulating circuit and a motor, and configured to drive the motor according to the plurality of on-time signals from the waveform frequency modulating circuit;
wherein the waveform frequency modulating circuit modulates frequencies of at least some of the plurality of waveforms of each of the plurality of on-time signals to be different from each other, such that electromagnetic wave energy emitted by the motor driver is dispersed.