Three-phase PWM with Teensy 4. PWM is made with eFlexPWM submodules and PIT (Periodic Interrupt Timer). The settings are mostly done with direct register setting.

Voltage boost is a frequency reference modification technique designed to maximize the linear modulation range in variable frequency drives (VFDs). The core principle is to synchronize the motor frequency reference with the DC voltage ripple, aligning the peak DC voltage with the mid-sector of the space vector modulation.

This concept is evaluated through a numerical example, which includes DC voltage filtering, sector angle sampling, and a P-controller to adjust the frequency reference.