US 11,689,133 B1
Inverter switching frequency control systems and methods
Muhammad Hussain Alvi, Troy, MI (US); Le Chang, Shelby Township, MI (US); and Suresh Gopalakrishnan, Troy, MI (US)
Assigned to GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed by GM GLOBAL TECHNOLOGY OPERATIONS LLC, Detroit, MI (US)
Filed on Dec. 20, 2021, as Appl. No. 17/555,707.
Int. Cl. H02P 21/00 (2016.01); H02P 27/08 (2006.01)
CPC H02P 21/50 (2016.02) [H02P 27/08 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A motor control system comprising:
a voltage command module configured to determine a target d-axis voltage for an electric motor and a target q-axis voltage for the electric motor;
a target frequency module configured to:
selectively set a target switching frequency to a first predetermined switching frequency; and
selectively set the target switching frequency to a second predetermined switching frequency that is at least 2 kilohertz (kHz) greater than the first predetermined switching frequency; and
a switching module configured to:
based on the target d-axis voltage and the target q-axis voltage, determine target pulse width modulation (PWM) duty cycles for phases, respectively, of the electric motor; and
switch switches of legs of an inverter module connected to the phases of the electric motor at the target PWM duty cycles, respectively, and the target switching frequency.