TY - GEN

T1 - Application of the principle of energy conservation to modeling the PWM converters

AU - Kazimierczuk, Marian K.

AU - Czarkowski, Dariusz

PY - 1993

Y1 - 1993

N2 - Parasitic resistances and offset voltage sources of power switches are included in the averaged-circuit models of an actual switching part of PWM transformerless converters which operate in a continuous conduction mode. The actual switching part is divided into the ideal switching part and its parasitics. It is shown that the ideal switching part can be modeled by one of 24 equivalent averaged circuits, each consisting of a dependent current source and a dependent voltage source. The parasitics are averaged using the principle of energy conservation. The obtained nonlinear large-signal model of the actual switching part can be placed into the buck, boost, and buck-boost topologies leading to averaged-circuit models of power stages. Linearization of the model around a dc operating point results in dc and small-signal models of the converters. Reflection rules are established which can be used to simplify the circuit models. The proposed method is illustrated by modeling the PWM boost converter.

AB - Parasitic resistances and offset voltage sources of power switches are included in the averaged-circuit models of an actual switching part of PWM transformerless converters which operate in a continuous conduction mode. The actual switching part is divided into the ideal switching part and its parasitics. It is shown that the ideal switching part can be modeled by one of 24 equivalent averaged circuits, each consisting of a dependent current source and a dependent voltage source. The parasitics are averaged using the principle of energy conservation. The obtained nonlinear large-signal model of the actual switching part can be placed into the buck, boost, and buck-boost topologies leading to averaged-circuit models of power stages. Linearization of the model around a dc operating point results in dc and small-signal models of the converters. Reflection rules are established which can be used to simplify the circuit models. The proposed method is illustrated by modeling the PWM boost converter.

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M3 - Conference contribution

AN - SCOPUS:0027837751

SN - 0780309081

T3 - Proceedings of the IEEE Conference on Control Applications

SP - 291

EP - 296

BT - Proceedings of the IEEE Conference on Control Applications

A2 - Anon, null

PB - Publ by IEEE

T2 - Proceedings of the 2nd IEEE Conference on Control Applications

Y2 - 13 September 1993 through 16 September 1993

ER -