What is the relation between the control voltage and resulting pwm in a voltage-mode control system for DC-DC converters?
&quot;If Ve is 0, how is the pwm generator able to generate any pulse signal to drive the transistor since the control voltage will be 0 coming out of the compensator?&quot;
In a proportional negative feedback system, the controlled output will never track the target exactly. There will be some error, but if the overall loop gain is high, that error will be small.
When &quot;integral&quot; feedback is added to a system, the error is integrated (and possibly added to a proportional error and/or a differential error), so that even a tiny error will eventually cause the system to respond to correct that error. The error will then tend to become increasingly small over time.
Without knowing the nitty gritty of the compensator, I can nevertheless note that it is characterized by G(s). Those particular symbols (G and s) are typical of a what is called a transfer function (The ratio of the Laplace Transform of the output of a component to the Laplace Transform of the input). The mere use of a transfer function in this spot, suggests that there may be some &quot;integral&quot; feedback here. (Or not. It isn't specified, so I don't know for sure.)