8.1 ANALOG PULSE WIDTH MODULATION CONTROLLERS
The pulse width modulation (PWM) controller represents the final module within the feedback control path (Figure 8.1). It is therefore suitable to implement this module in the same technology as the control module. If the feedback control is achieved with analog circuits for high-speed, closed-loop control, the PWM controller should also be analog.
The basic role of the PWM module is to convert a reference signal to a train of pulses with a duty cycle variable upon the reference [17,18,19,26,29]. In a three-phase system, the reference is represented by a set of three-phase variables, normally symmetrical, and the PWM pattern is delivered ...
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