CONTROL DEVICE OF A PULSE WIDTH MODULATION CONVERTER, LOWERING THE UNIT COST OF PRODUCTION BY REDUCING THE NUMBER OF MEASUREMENT ELEMENTS

摘要

PURPOSE: A control device of a PWM(Pulse Width Modulation) converter is provided to lower the unit cost of a device by reducing the number of measurement elements.;CONSTITUTION: A reference voltage signal generation part(110) receives the source current(is) of a PWM converter and generates a reference voltage signal(Vref), and includes a differentiator(sL) and a band-pass filer(BPF). A current generation part(120) receives a DC(Direct Current) voltage(Vdc), generates a reversed source current signal(is*), and inputs a signal, which adds the reference voltage signal and the reversed source current signal, into an output part(130). The output part generates a pulse width modulated source voltage signal(Vpwm) after the signal, which adds the reference voltage signal and the reversed source current signal, passes through a PI(Proportional-Integral) controller, and generates PWM signals(S1,S2) by comparing the sizes of the source voltage signal and a carrier signal(Vcar). A polarity compensator(140) compensates for the polarity error of the DC voltage signal, and a dead-time compensator(150) compensates for the dead-time of the source current. The output part generates the pulse width modulated source voltage signal by adding up the DC voltage signal compensated by the polarity compensator, the source current signal compensated by the dead-time compensator, and the generated reference voltage signal.;COPYRIGHT KIPO 2013