Research on the oscillation reduction control based on the P1 frequency control in hybrid electric vehicles

To mitigate high-frequency electromagnetic interference generated by the motor assembly of new energy vehicles near the switching frequency and minimize customer complaints, this paper analyzes the mechanism of switching frequency noise generation in the motor assembly, explores methods to control the switching frequency noise, proposes a random switching frequency strategy and analyzes its impact on the switching frequency noise. Finally, a vehicle test is conducted, and the findings demonstrate that employing a random switching frequency strategy can substantially diminish switching frequency noise without necessitating an increase in the overall switching frequency.