Abstract
This paper evaluates the performance of magnetic amplifier regulator in isolated off-line power supplies with power factor correction stage. A research of operation modes of power converter, based on high frequency magnetic amplifiers, with power factor correction was conducted for the first time. Simplified controller circuitry is suggested and analyzed. Experimental results are reported.
Highlights
Advances in low-loss magnetic materials continue to maintain an interest in a well founded power control technology - the magnetic amplifier (MagAmp) [1] and [2]
Numerous topologies for MagAmp regulator schemes were proposed in literature [3] - [5]
This paper describes an isolated, MagAmp regulated ac-dc converter with good dynamic characteristics and high power factor within a wide range of the load current
Summary
Advances in low-loss magnetic materials continue to maintain an interest in a well founded power control technology - the magnetic amplifier (MagAmp) [1] and [2]. Studies showed that at 10 kW and 10 kHz the IGBT converter losses are about 100 W, whereas with a Magamp design the losses are as low as 25 W. At 80 kHz the IGBT losses are about 355 W while with a Magamp design they are only about 25 W [11]. MagAmp regulator can facilitate zero voltage soft switching of the active devices of the driving power stage [13]. Front end multiple output LLC resonant converter with MagAmp post regulation was demonstrated operating at 110 kHz [14] and [15]. Application of high-frequency MagAmps is a viable solution for implementing converters with multiple isolated high-current regulated outputs
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