Experimental measuring method for stray capacitance of transformer

The invention discloses an experimental measuring method for stray capacitance of a transformer. The experimental measuring method comprises the steps of: making all distributed capacitors equivalentto a parasitic capacitor Cw connected to two ends of a primary winding of the transformer according to a transformer stray capacitance equivalent model; constructing a circuit for measuring stray capacitance of the transformer, wherein the circuit comprises an inverter half bridge, a resonance network and a rectification and filtering circuit which are sequentially connected; acquiring a current of an excitation inductor, driving a voltage of a switching tube Q2, drain-source voltages of the switching tube Q2 and waveforms of the output voltages, and reading a dead time, a dead time period excitation current value and a dead time period output voltage value of the waveforms; integrating output capacitance from 0 to an input voltage according to a C-V curve of the output capacitance of theswitching tube; and calcul