Title :
Dynamic performance of PWM DC-DC boost converter with input voltage feedforward control
Author :
Kazimierczuk, Marian K. ; Starman, LaVern A.
Author_Institution :
Dept. of Electr. Eng., Wright State Univ., Dayton, OH, USA
fDate :
12/1/1999 12:00:00 AM
Abstract :
Small-signal characteristics are studied for a pulse-width modulated (PWM) boost converter with input voltage feedforward control. The characteristics are valid for the continuous conduction mode (CCM). A small-signal circuit model is used to derive the input-to-output voltage transfer function (audio-susceptibility), the input impedance, and the output impedance. A response of the output voltage to a step change in the input voltage is also computed. The measured Bode plots of the input-to-output voltage transfer function agreed with that predicted theoretically. It is shown that the feedforward control may reduce the magnitude of the input-to-output voltage transfer function by 40 dB. The input resistance of the converter with feedforward control is negative at low frequencies. The output impedance is not affected by feedforward control
Keywords :
DC-DC power convertors; PWM power convertors; feedforward; step response; transfer functions; Bode plot; PWM DC-DC boost converter; audio-susceptibility; continuous conduction mode; input impedance; input voltage feedforward control; input-to-output voltage transfer function; output impedance; small-signal circuit model; step response; Circuits; DC-DC power converters; Impedance; Negative feedback; Open loop systems; Pulse width modulation; Pulse width modulation converters; Reactive power; Transfer functions; Voltage control;
Journal_Title :
Circuits and Systems I: Fundamental Theory and Applications, IEEE Transactions on
