Hc. Choi et Mj. Youn, COMPUTER-BASED CONTROLLER-DESIGN FOR QUANTUM BOOST SERIES RESONANT RECTIFIER, International journal of electronics, 78(5), 1995, pp. 1029-1045
To obtain a stable output voltage from a recently-developed rectificat
ion circuit called a quantum boost series resonant rectifier (QBSRR),
two control schemes, digital PI (proportional-integral) control and de
adbeat control, are derived for a computer-based system. Since the out
put voltage regulation loop has a sampling time corresponding to the z
ero crossing point of the AC line voltage, the output voltage can be c
ontrolled regardless of the 120 Hz ripple component. By deriving a sim
ple and exact model for the current program loop (open loop) of a QBSR
R and using the pole-assignment technique, the controller gains can be
systematically designed in the digital PI control scheme. The deadbea
t control scheme is also developed to maintain fast dynamic performanc
e in the presence of any load variations. In this control scheme, the
controller gain is adjusted in accordance with the load information us
ing a load estimation method. Simulation and experimental results are
presented to verify the usefulness of these two control schemes.