Abstract. This paper will focus on Bouc-Wen hysteresis model to study the time-scale similarity of the hysteresis. Considering different hysteresis characteristics of Bouc-Wen model, this paper studies the time-scale similarity between the output curves of different hysteresis characteristics under the excitation of the triangular waves with different frequencies, and the Euclidean distance function is used to measure the curve similarity. The time-scale similarity proposed in this paper will contribute to establishing a dynamic similarity model, which is without complex operation and don't need a lot of storage space.

Design a DC/AC converter based on simplex single voltage source high frequency pulse DC loop technology, the output is 115V400Hz, 0.9KVA and the input is three phase alternating current. The forward part is DC/DC converter which provides pulse D.C. to the back part DC/AC converter. Implement soft-switch by changing the on-off state of switching tubes on the inversion arm path at the zero-voltage instant of the pulse direct current, no need of the auxiliary resonant net. The system takes three-state DPM current hysteresis control mode, gets good performance on output wave and efficiency.

A high frequency pulse D.C. Link Soft-Switched Electron load based on Discrete Pulse Modulation (DPM) control is introduced. The method of energy recovery is used to implement various discharging of the storage battery．The electron load developed has good performances such as a good sinusoidal output wave，a rapid dynamic response and a good stability etc.．