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•The cross current phenomenon in static transfer switch (STS) system has been studied theoretically, experimentally and by simulation.•A “safe triggering region” (STR) control scheme is proposed to enhance the traditional make before transfer (MBB) transfer strategy, which can limit cross current to a safe level when it happens.•The STR method doesn’t rely on the current measurement.•By using STR...
This paper evaluates the performance of magnetic amplifier regulator in isolated off-line power supplies with power factor correction stage. Simplified controller circuitry is suggested and analyzed. Experimental results are reported.
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