The OLD-PWM technique is a unit step response of transient condition. It can operate in a stable operation to complete in a certain switching period. The control scheme of the power electronics is required to a different carrier and sinusoidal signal into generates digital PWM gating signal output as shown in below Fig. 10 .. .
CLD-PWM is generally working under state variables due to interference of the load variation. They are dividing the implementation of the control scheme in 3 major categories: 1. (1) Counter based D-PWM. 2. (2) Delay line. .
The counter based D-PWM are operated at three major categories: 1. (1) Down counter—Leading edge counter triggering DPWM. 2. (2) Up counter—Trailing edge counter triggering DPWM. 3. (3) Up/Down counter—Dual edge.
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