Motor Control System Voltage Fluctuation Suppression

The patent dynamically adjusts the carrier frequency based on operating conditions (motor speed and torque). When motor speed is low and torque is high, the carrier frequency is reduced to lower switching losses and temperature rise. When motor speed is high or torque is low, the carrier frequency is increased to maintain smooth waveforms and stable control. This dynamic adaptation resolves the contradiction between temperature reduction and control stability.

The patent changes the carrier frequency parameter according to the operating point of the motor. By monitoring motor speed and torque, the system selects appropriate carrier frequency values from a predefined map or range. This parameter change strategy allows the system to optimize between thermal performance and control quality depending on the current operating conditions.

The system dynamically adjusts carrier frequency based on real-time motor operating conditions. When low speed and high torque conditions are detected, the carrier frequency is reduced to minimize switching losses and heat generation. The system accepts increased torque ripple as a trade-off, since the primary goal in this operating region is thermal management. This dynamic strategy resolves the contradiction between energy loss reduction and voltage stability.

The patent implements parameter changes in carrier frequency based on the operating map of the motor. By pre-defining optimal carrier frequency ranges for different speed-torque regions, the system can switch between frequency values to optimize performance. In low-speed high-torque regions, lower carrier frequencies are selected to reduce heat, while accepting the resulting voltage fluctuations as an acceptable trade-off for thermal management.

The patent dynamically adjusts the boosted voltage reference based on the carrier frequency and motor operating conditions. When the carrier frequency is low (indicating low-speed high-torque operation), the system increases the boosted voltage reference to compensate for the increased voltage fluctuations caused by torque ripple. This dynamic adjustment maintains boost converter control performance across different operating regions while accepting some increase in voltage reference as necessary for stability.

The system changes the boosted voltage parameter based on the operating conditions and carrier frequency. By monitoring the carrier frequency and motor torque, the system selects appropriate boosted voltage reference values. When low carrier frequency operation is detected, the boosted voltage reference is increased to maintain adequate voltage headroom and reduce the impact of counterelectromotive force fluctuations on control performance.