A Novel Experimental Measurement Method of Transformer Parasitic Capacitances

摘要

As the increase of switching frequency and the extensive use of planar transformers, the capacitive effects of transformers can't be neglected anymore. Firstly, several transformer parasitic capacitance models are introduced in this paper. Next, this paper proposes a novel experimental method, charge balance method, to measure transformer parasitic capacitances. This method is applicable to single lumped parasitic capacitance model. Finally, the step response method is performed to verify the charge balance method. Experimental results show that the charge balance method is of high accuracy.