Measurement of PT equivalent circuit model parameters based on admittance circle

The piezoelectric transformer (PT) as a pressurized component used in fuse all-electronic safety and arming device improves its security and reliability. The manufacturing materials and geometric parameters error of PT results in the error of the equivalent circuit model parameters. In order to effectively obtain accurate equivalent model parameters, the admittance circle is used to measure equivalent circuit parameters of PT, to obtain its frequency characteristics, then to calculate the equivalent circuit model parameters. The measurement results provide a theoretical basis to the circuit design of the fuse all electronic safety and arming device.