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Aiming the great phase lag of the control-to-output small signal transfer function of LCC resonant converter, compensation networks composed of a band-stop filter and a single-pole-single-zero network are designed. Matlab and PSpice simulations are finished simultaneously, which verify that the output voltage can be regulated automatically in the disturbance of load changing. And good steady-state...
In this paper, a novel discrete model has been proposed to simulate the controller IC UC3854. The main contributions are as followings: 1) The power stage of the Boost converter has been modeled by using the large signal approach and the loop gain of current program has been put forward; 2) The continues-time voltage control diagram has been investigated by employing equivalent power stage which contains...
The dynamic power loss in buck converter has been investigated in this paper, and the main contributions are as follows: (1) A transient analytic model for buck converter has been proposed to calculate the transient loss. This proposed model involves with some significant parasitic parameters which was always ignored in past; (2) Based on the proposed model, the total dynamic power loss in buck converter...
A novel design method for CIC-CPPFC circuit has been proposed in this paper. The main contributions are as follows: (1) The principle of CIC-CPPFC circuit has been introduced and a few of significant formulas have been derived to compute the input current, input power and so on; (2) Based on these formulas, the parameters of the CIC-CPPFC can be simply calculated. Therefore, a design procedure and...
A charge pump power factor correction (CPPFC) circuit for PT power converter has been proposed according to the circuit topology and the features of PT. The main contributions are as follows: 1) The principle of continuous input current CPPFC circuit and the unity power factor condition have been analyzed; 2) The design method has been put forward and the parameters have been calculated; 3) The Pspice...
A novel design method - narrow control bandwidth for the PT power converter has been proposed according to the electrical characteristics and the operation features of PT. The method has been proved through the input matching network of PT. The main contributions are as follows: 1) The functions of the input matching network has been analyzed; the design method has been put forward and the parameters...
A single stage AC/DC converter with resonant model PFC has been deeply studied in this paper by mathematic analysis. The following results have been revealed: (1).The working conditions for the circuit have been derived and can be expressed by the formulas, which can be used to select the parameters of the circuit; (2). It has been proved that the bus voltage decreases if output power increases and...
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