Analysis and design of a loss-free resistor based on a boost converter in PWM operation

Abstract

The synthesis of a boost-converter-based loss-free resistor (LFR) operating in PWM is presented. The resulting LFR can be used as a preregulator for power factor correction in one-phase circuits. PSIM simulations are in good agreement with the theoretical predictions.

Bifurcation behavior in a two-loop DC-DC quadratic boost converter

“…1. Two-loop controlled quadratic boost converter such a way to impose a fixed frequency loss free resistor [10].…”

Battery-supplied transformerless ballast for DC high intensity discharge (HID) lamps

“…Indeed, as the inductor and the input currents in a boost converter are equal, a LFR can also be realized [19][20] by imposing a sliding mode in this converter, with a surface given by s(x)=Vg-Reh, [19] Although the idea of using a LFR to realize non dissipative ballast for gas discharge lamps was already introduced in [19], no circuit was proposed then. From that, we continue here that work proposing here a possible LFR implementation to supply and regulate a DC-HID lamp from a 12 V car battery.…”

“…From equation (20) and according to the surface restrictions V CJ=V C2, and V c3=2V CJ, given by the control signals U2 and U3, Cj and C2 have the same voltage, whereas C3 has double voltage and dynamics. This is in perfect agreement with simulations given in Section IV.…”

Digital Loss-Free Resistor for power factor correction applications

“…The main feature of the LFR is the fact that the input current is proportional to the input voltage. A. Cid et al presented in [2,3] a systematic procedure to synthesize LFR imposing certain sliding modes on some power converters. On one hand, the implementation of LFRs in sliding mode control allows obtaining a good agreement between fast transient responses and low harmonic distortion of the input current, indispensable features to work as a preregulator for power factor correction.…”

“…Different works present synthesis of LFR operating at a constant switching frequency, sometimes with the aim to shorten the distance between both operation modes. In that sense, in [4] a correspondence between the equivalent control in sliding mode and the zero dynamics nonlinear pulse width modulation control [5] is presented in order to design a LFR based on a boost converter. However, its main drawback is the need to use an analog divisor.…”