Figure 4-17 shows the measured phase U motor current and the low-pass filtered phase U voltage
with a 1-Hz sinusoidal output voltage at 27 V driving the AC induction motor at no
mechanical load. Due to the very low dead-time of 120 ns at 16-KHz PWM, there are no
distortions in the phase voltage U, especially visible when the phase crosses zero.
The linearity plot in Figure 4-18 shows the high linearity between PWM duty cycle and average phase voltage and
related phase current. Therefore, dead-time compensation methods are not required
with LMG3422R030 GaN-FETs and BOM cost is reduced.