Abstract
Recently, the electrical apparatus using power semiconductor devices have been available for not only industrial machines but also home appliances. However, a large amount of harmonic currents generated by them have a bad influence on the electrical power systems and equipment around.
Active filter is the apparatus to eliminate these harmful current by using switching devices. Although some methods have been already proposed, most of them have adopted the circuit based on the voltage source PWM inverter with high speed switching devices, such as IGBT. Therefore, it may be difficult to increase the capacity of the active filter.
This paper proposes an active filter using current source PWM inverter.
Even carrier frequency of about 2.5 kHz, the proposed active filter can eliminate harmonic currents of less than 13-th order in the distribution line. So it can be constructed by the bipolar transistors. Furthermore, the control circuit is quite simple.
In this paper, the circuit configuration, the control method and the performance characteristics of the proposed active filter are discussed. We will show the simulation and experimental results of the tested apparatus.
