| Abstract |
Conventional AC-chopper circuits using bi-directional switches can be used to control ac power. These
bi-directional switches are generally anti-series connected self-commutative switches. As a result,
there are problems regarding the main circuit configuration and snubber circuit, among others, and few
AC-chopper circuits have been used in practice.
Then, we authors proposed a novel PWM controlled AC-chopper circuit based on dc-clamped bilateral
switching circuit topology. And an ac power supplies using a PWM controlled AC-chopper circuits
was commercialized.
First, this paper outlines the problems of conventional AC-chopper circuits. It then proposes a PWM
controlled ac power supply, which is a novel AC-chopper circuit topology, and describes its principle of
operation. Furthermore, an ac voltage regulator and a series voltage-compensated ac voltage
regulator are introduced as typical applications of the proposed AC-chopper circuit. |
