Electric drive assembly with dynamic control of pulse width modulation switching

• Main Authors: WELCHKO, BRIAN, A, SPAVEN KAREN MARIE, GAJAS BRIAN S
• Format: Patent
• Language: Chinese; English
• Published: 30.08.2022
• Subjects: CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORSOR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES; ELECTRICITY; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL; GENERATION; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; PERFORMING OPERATIONS; TRANSPORTING; VEHICLES IN GENERAL

The invention relates to an electric drive assembly with dynamic control of pulse width modulation switching. An electric drive system includes a rechargeable energy storage unit, a power inverter, an electric motor, and a controller having a processor and tangible, non-transitory memory with instructions recorded thereon. Transfer of power between the rechargeable energy storage unit and the electric motor is managed by a pulse width modulation (PWM) switching frequency. The controller is configured to determine a current switching frequency based in part on the PWM type, the PWM switching frequency pattern, and the inverter DC voltage. The PWM scalar is determined based in part on a current switching frequency and a control reference frequency maximum. The controller is configured to transmit a command signal to adjust transmission of power based in part on a PWM scalar, the PWM switching frequency being proportional to a product of the PWM scalar and a control reference frequency. 本发明涉及具有脉宽调制切换的动态控制的电驱动组件。