Global closed loop control system with DV/DT control and EMI/switching loss reduction

A method for controlling a motor drive system to reduce noise, the motor drive system including at least one pair of high- and low-side power switches having gate terminals and connected between a DC voltage line and a voltage line return, the method comprising the steps of:

• receiving input control pulses for control of the high- and low-side power switches;
• providing rate signals related to a desired rate of change of voltage per unit time for controlling the gates of the high- and low-side power switches in the motor drive system;
• generating set and reset pulses for indicating a length of the input control pulses supplied to the high-side power switch;
• applying the set and reset pulses to a gate driver circuit for the high-side power switch;
• converting the set and reset pulses to a voltage signal to control the gate drive circuit by varying the high-side power switch turn on and turn off time based on the voltage signal;
• and
• modifying the rate signals based on an adaptive trade off between noise reduction and switching losses in the high-side power switch by changing one of turn on and turn off times of the power switch.