Comparison between a novel zero-switching-loss topology and two existing zero-current-transition topologies

This paper presents a novel methodology to synthesize Zero-Current Zero-Voltage Transition (ZCZVT) topologies. The proposed methodology is based on the Auxiliary Voltage Source (AVS) concept, which permits extend the proposed new circuits to an entire class of converters. As the AVS concept is derived directly from the Resonant Transition mechanism, the new class of ZCZVT converters resembles some of the well-known Zero-Voltage Transition (ZVT) converters, holding their main advantages such as simplicity, low reactive energy and high performance. Theoretical and experimental analyses are carried out throughout the paper taking the boost converter as the case study. Nevertheless, it can be extended to other PWM topologies, even the AC-DC and DC-AC converters. Experimental and comparative results have been obtained from three laboratory prototypes rated to 1 kW, 50 kHz, confirming the feasibility of the novel synthesis concept and also the reliability of the new ZCZVT converters in what refers to efficiency as well as to di/dt and dv/dt control.

Section: Comparative and Experimental Resultsmentioning

confidence: 91%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Zero-current Zero-voltage Transition Pwm Converters With Magnetically Coupled Auxiliary Circuit

Martins¹,

Russi²,

Pinheiro³

et al. 2008

“…The ZCZVT technique combines Zero-Current switching turn-off conditions and Zero-Voltage switching turn-on conditions for the same device, reducing IGBT losses and improving EMI performance. Nevertheless, the price paid for such favorable switching conditions is the addition of a resonant auxiliary circuit that yields in additional reactive energy [9]. This energy is handled by the auxiliary devices which result in additional conduction and switching losses.…”

Section: Introductionmentioning

confidence: 99%

Zczvt Inverters With Magnetically Coupled Auxiliary Pole

Martins¹,

Stein²,

Russi³

et al. 2010

Existing Zero-Current Transition and Zero-Current Zero-Voltage Transition inverters provides favorable switching conditions for IGBT semiconductors increasing significantly the reactive energy of the converter. This situation offset the benefits accomplished by abovementioned soft-switching techniques. This paper presents a novel family of Zero-Current Zero-Voltage Transition inverters that overcome this problem by using no resonant tank in the auxiliary circuit. It accomplishes the favorable soft-switching conditions with a magnetically coupled auxiliary voltage source which is derived directly from the inverter filter inductor. Theoretical analysis of the inverter operation is presented and it is verified experimentally from a 1kW, 40kHz, laboratory prototype. The obtained experimental results prove the reliability of the proposed family of ZCZVT inverters.

“…Nevertheless, the effectiveness of the Resonant Transition techniques relay on the fact that auxiliary circuit losses do not off-set the switching losses saved from main semiconductors. The auxiliary circuit losses are quite dependent on the reactive energy produced by resonant elements that comprises the auxiliary circuit [18]. Hence, an adequate design for the auxiliary circuit is critical to ensure a superior performance.…”

Section: Introductionmentioning

confidence: 99%

Design Criterion For Zczvt Single-phase Inverters With Magnetically-coupled Auxiliary Pole

Martins¹,

Stein²,

Pinheiro³

et al. 2010

This paper presents in detail a design methodology for Zero-Current Zero-Voltage Transition inverters with magnetically-coupled auxiliary circuit. These ZCZVT inverters accomplish favorable softswitching conditions with a magnetically coupled auxiliary voltage which is derived directly from the inverter filter inductor. It ensures no resonant auxiliary circuit, reducing circulating reactive energy. The design methodology takes into account the semiconductor requirements to ensure low switching losses on the assisted IGBT modules, which is very important to ensure the best characteristics of the ZCZVT technique. The theoretical analysis is verified experimentally by means of a 1kW, 40 kHz laboratory prototype. The results prove the high efficiency of the prototype implemented according to the proposed design.