Abstract
This paper is the study of a low-current-ripple and
high-bandwidth corrector power supply. The main circuit of this
power supply is using a full bridge (H-bridge) structure, and the
output current through the high-precision direct current current
transducers (DCCT) to transfer the reference voltage to the
controller. Previous TPS corrector power supply had a 4.7 kHz
current bandwidth, and its output current ripple was
100 μA. Such current ripple and bandwidth do not satisfy the
requirements of a rapidly orbiting feedback system of air core
loading. Therefore, our research team designed a novel prototype
power supply with a high bandwidth (more than 10 kHz) and low
output current ripple (less than 10 μA) which was developed
via a novel topology circuit. The operation frequency of the main
power switch's n-type metal-oxide-semiconductor logic of this novel
circuit is increased to 245 kHz. Moreover, the output results of
the filter inductor and filter capacitor are modified to
80 μH and 2.46 μF, respectively. The prototype power
supply bandwidth reached 10.546 kHz and increase of 124% and its
output current ripple was lowered below than 5 μA. The
properties of this corrector power supply are very important for the
beam correction in storage rings. Finally, A circuit with an input
voltage of 48 V, a maximum output current of 10 A, and an output
power of 400 W is tested in a laboratory to verify the performance
of the developed corrector for the National Synchrotron Radiation
Research Center.
High-bandwidth magnet power supply for iron core corrector in Taiwan Photon Source