power inductance
3.Familiar PWM, PFM control chip, IGBT, power component, high-frequency transformer, inductance and so on MOSFET and so on magnetic elements.
4.The coupled inductor and the forward transformer transfer the power together in which, the coupled inductor in flyback BDC, and the leakage inductance in phase shifted BDC vice verse.
5.The basic idea is that increasing the equivalent harmonic impedance of power network by valid control of active filter, in order to enhance the performance of passive filter and damp the resonance between the passive filter and the equivalent inductance of the power network.
6.Based on both quantitative calculation and theoretical analysis, the magnetically strong and electrically weak connection of power networks and its impacts on the behaviors of zero sequence pilot protection are studied in detail, the reasons and characteristics of the misoperation are summarized, some typical power network topologies that are prone to misoperation are analyzed, and several countermeasures for eliminating the influences of mutual inductance on zero sequence pilot protection are proposed for the sake of the increasingly meshed power networks.
7.Consideration to Step-Up and power factor correction, Based on comparison of kinds of APFC circuit topology, Boost circuit is designed. Based on SPWM control chip UC3854, through the control of output Voltage loop and input inductance current loop, 400V Stable DC voltage output and power factor correction is realized. Based on MATLAB environment,system is simulated.
8.With reference to the new design of electric locomotive, the article clarifies the effects of transformer leakage inductance on the power sup ply characteristics (power factor, current harmonic component) of electric locomotive. It also derives the concerning computation formula and carries out computation and analysis by using computer.
9.The effect may be minimized by lowering the Q of the inductance, which is most.easily done by inserting a small resistance in the power line, close to the IC.
10.The faculties in Zhejiang University have begun the research of solid states power switch and fault current limiting technology. They provide a novel solid stats fault current limiting technology, which possesses flexible control mode. The experimental prototypes of 380V/200A transformer coupling three phase bridge type solid state fault current limiter (SSFCL) and 10Kv/500A transformer coupling three phase bridge type SSFCL with bypass inductance have been developed successfully.
