In this paper, nonlinear-carrier (NLC) control is proposed for high-power-factor rectifiers based on flyback, Ćuk, Sepic, and other up–down converters operated in the continuous conduction mode (CCM). In the NLC controller, the switch duty ratio is determined by comparing a signal proportional to the integral of the switch current with a periodic nonlinearcarrier waveform. The shape of the NLC ...

This paper is about a new dc-dc converter based on VOLTAGE MULTIPLIER CELL and MULTI STATE SWITCHING CELL. This method can be applied for all type of converters like BUK, BOOST,BUKBOOST,CUK,SEPIC &ZETA. To verify the operating principle BOOST converter is chosen. Experimental analysis is obtained from 1Kw lab prototype and the results are verified using simulation software. The output current a...

A unified approach is suggested for the derivation of current-tocurrent converter topologies, which relies on duality principles. As conventional duality rules have restricted utility and are difficult to apply with switched mode circuits, special attention is devoted to switch mode converter element dualities. Also, a special means of viewing complex switched mode topologies as a cascade combi...

This article describes a battery charger, which is powered by thermoelectric (TE) power modules. This system uses TE devices that directly convert heat energy to electricity to charge a battery. The characteristics of the TE module were tested at different temperatures. A SEPIC dc–dc converter was applied and controlled by a microcontroller with the maximum power point tracking (MPPT) feature. ...

In this paper, the concept of the modulated-ramp PWM generator is presented. The specific nonlinear behavior of this generator enables an exact linear control-to-output static conversion characteristic of DC-DC switching converters, such as the boost (step-up), buck/boost, Ćuk or Sepic, operating in Continuous Conduction Mode (CCM). The resulting linearization leads to a significant improvement...

In this paper, a comparative analysis of three multi-loops control schemes dedicated to the single ended primary inductance converter (SEPIC) power factor corrector (PFC) is presented. The first control technique uses a robust hysteresis current controller; the second control strategy consists of a frequency–domain linear design of regulators on the basis of a small-signal averaged model of the...