### Abstract

A constant-frequency phase-controlled series-parallel resonant dc-dc converter is introduced, analyzed in the frequency domain, and experimentally verified. To obtain the dc-dc converter, two identical series-parallel resonant inverters are paralleled and the resulting phase-controlled resonant inverter is loaded by a voltage-driven rectifier. The converter can regulate the output voltage at a constant switching frequency in the range of load resistance from full-load resistance to infinity while maintaining good part-load efficiency. The efficiency of the converter is almost independent of the input voltage. For switching frequencies slightly above the resonant frequency, power switches are always inductively loaded, which is very advantageous if MOSFET's are used as switches. Experimental results are given for the phase-controlled series-parallel resonant converter with a center-tapped rectifier at an output power of 52 W and a switching frequency of 127 kHz. The measured current imbalance between the two inverters was as low as 1.2:1.

Original language | English (US) |
---|---|

Pages (from-to) | 309-319 |

Number of pages | 11 |

Journal | IEEE Transactions on Power Electronics |

Volume | 8 |

Issue number | 3 |

DOIs | |

State | Published - Jul 1993 |

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### ASJC Scopus subject areas

- Electrical and Electronic Engineering

### Cite this

*IEEE Transactions on Power Electronics*,

*8*(3), 309-319. https://doi.org/10.1109/63.233288

**Phase-controlled series-parallel resonant converter.** / Czarkowski, Dariusz; Kazimierczuk, Marian K.

Research output: Contribution to journal › Article

*IEEE Transactions on Power Electronics*, vol. 8, no. 3, pp. 309-319. https://doi.org/10.1109/63.233288

}

TY - JOUR

T1 - Phase-controlled series-parallel resonant converter

AU - Czarkowski, Dariusz

AU - Kazimierczuk, Marian K.

PY - 1993/7

Y1 - 1993/7

N2 - A constant-frequency phase-controlled series-parallel resonant dc-dc converter is introduced, analyzed in the frequency domain, and experimentally verified. To obtain the dc-dc converter, two identical series-parallel resonant inverters are paralleled and the resulting phase-controlled resonant inverter is loaded by a voltage-driven rectifier. The converter can regulate the output voltage at a constant switching frequency in the range of load resistance from full-load resistance to infinity while maintaining good part-load efficiency. The efficiency of the converter is almost independent of the input voltage. For switching frequencies slightly above the resonant frequency, power switches are always inductively loaded, which is very advantageous if MOSFET's are used as switches. Experimental results are given for the phase-controlled series-parallel resonant converter with a center-tapped rectifier at an output power of 52 W and a switching frequency of 127 kHz. The measured current imbalance between the two inverters was as low as 1.2:1.

AB - A constant-frequency phase-controlled series-parallel resonant dc-dc converter is introduced, analyzed in the frequency domain, and experimentally verified. To obtain the dc-dc converter, two identical series-parallel resonant inverters are paralleled and the resulting phase-controlled resonant inverter is loaded by a voltage-driven rectifier. The converter can regulate the output voltage at a constant switching frequency in the range of load resistance from full-load resistance to infinity while maintaining good part-load efficiency. The efficiency of the converter is almost independent of the input voltage. For switching frequencies slightly above the resonant frequency, power switches are always inductively loaded, which is very advantageous if MOSFET's are used as switches. Experimental results are given for the phase-controlled series-parallel resonant converter with a center-tapped rectifier at an output power of 52 W and a switching frequency of 127 kHz. The measured current imbalance between the two inverters was as low as 1.2:1.

UR - http://www.scopus.com/inward/record.url?scp=0027625832&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027625832&partnerID=8YFLogxK

U2 - 10.1109/63.233288

DO - 10.1109/63.233288

M3 - Article

VL - 8

SP - 309

EP - 319

JO - IEEE Transactions on Power Electronics

JF - IEEE Transactions on Power Electronics

SN - 0885-8993

IS - 3

ER -