The usage of fast-front pulses coming from SiC/IGBTs based PWM inverters leads to premature failures and dielectric losses. The dielectric losses due to overvoltage and dead time components in fast switching dv/dt pulses produce additional thermal transients and partial discharges in motor insulation. One of the main reasons for such transients is nonuniform electric field distribution due to overvoltage and dead time effect in nanosecond pulses coming from PWM inverters. It is an urgent requirement to suppress surface charges and thereafter partial discharge (PD) activities for these EV motors. Tailoring the thermal transients and non-uniform electric field distribution for motor winding, by applying the surface-modified graded conductivity coating method is proposed in this project. Here, we introduce a surface coating of polyamide-imides/composite varnishing with a varying conductivity layer to regulate the surface charge and heat migration in the vicinity of the slot and magnetic coil triple junction. The influence of PWM waveform parameters such as overvoltage, dead time, and multilevel voltage waveforms will be studied in this project to test the performance of the modified surface graded magnetic coil of the EV motor.