Mahesh Toraskar Effect of Higher-Order VFD Harmonics on Motor Life Effect of Higher-Order VFD Harmonics on Motor Life Read time: ~4 minutes Executive summary Higher-order PWM harmonics from VFDs raise winding temperature, stress insulation, and cause bearing EDM—quie... 5th harmonic 7th harmonic bearing currents, edm fluting dv/dt iec 60034-17 iec 60034-25 inverter-duty motor motor insulation life nema mg1 part 31 pwm harmonics shaft voltage sine filter variable frequency drive Oct 2, 2025
