A Single-Phase Electromagnetic Transformer with an Adjustable Output Voltage

This paper presents a new signal-phase electromagnetic transformer with an adjustable output voltage. The transformer uses a magnetic flux valve (MFV) to control the magnetic flux through the secondary winding. In this way, the amplitude of the output voltage induced across the secondary winding of the transformer can be adjusted continuously and quickly when the turn ratio and input voltage amplitude of the transformer are fixed. The configuration and working principle of the transformer are presented. A prototype of the proposed transformer was designed and constructed. Experimental results on the prototype were provided to validate the proposed transformer concept.