Consider running a 3 phase BLDC motor controller having 20KW inverter fed by 100V whence designed for high amperage. What happens if we turn it on and start gradually increasing duty cycle of the MOSFET gates PWM without connecting motor leads? Or a somewhat similar situation but more complex - connecting 3 phase motor but one phase wire is broken ... What can we observe on the phase output leads if we connect oscilloscope probe A-B, or B-C etc...? What happens to the inverter bridge MOSFETs ? Can this (no load) case be used to test at least some of the inverter specs? I think the conducting MOSFETs will not have a half bridge closed circuit for the current to run but, if so, I am confused about what happens if 2 phases are conducting but one is broken (unbalanced inverter's load)? Thanks in advance for any meaningful ideas as this question tests our understanding of the nature of the power inverters.