US 12,474,682 B2
Switching frequency variation for a motor
Stefan Golisch, Erfurt (DE); and Sandro Purfürst, Illmenau (DE)
Assigned to Infineon Technologies AG, Neubiberg (DE)
Filed by Infineon Technologies AG, Neubiberg (DE)
Filed on Nov. 16, 2022, as Appl. No. 18/056,202.
Prior Publication US 2024/0160167 A1, May 16, 2024
Int. Cl. H02P 27/04 (2016.01); G05B 15/02 (2006.01); G06F 7/58 (2006.01); H02P 21/18 (2016.01)
CPC G05B 15/02 (2013.01) [G06F 7/58 (2013.01); H02P 21/18 (2016.02); H02P 27/04 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A controller circuit configured to:
generate, using a random number generator, a set of bits, the random number generator comprising an analog-to-digital converter (ADC), wherein, to generate the set of bits, the controller circuit is configured to:
determine, using the ADC, data sampled at a motor for each period of one or more switching periods; and
determine one or more least significant bits of the data sampled for each period of the one or more switching periods to generate a set of least significant bits;
determine a switching frequency using the set of bits; and
control a switching circuit to switch at the switching frequency to drive the motor.