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The problems of model creating for nonlinear gate-drain capacitance of MOSFET are considered. A circuit is proposed for measuring this capacitance in the region of negative drain-gate voltages. The dependence of the gate-drain capacitance on voltage for the IRF540N transistor is constructed and an approximating function that can be used to create a model of a MOS-transistor is proposed.

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A method for increasing the energy efficiency of a wind power installation based on obtaining the optimal input I–V characteristic of an intermediate DC-DC converter using an improved model of a wind generator that takes into account the resistance of current-carrying conductors is considered.

The process of development of the PWM SPICE model of the HV9931 controller and testing in a typical switching-on scheme is given.