Regenerative Undeland Snubber Using a ZVS PWM DC–DC Auxiliary Converter Applied to Three-Phase Voltage-Fed Inverters

Sperb, Jonathan Dômini; Zanatta, Ilson Xavier; Michels, Leandro; Rech, Cassiano; Mezaroba, Marcello

doi:10.1109/tie.2010.2089947

Cited by 11 publications

(7 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, additional feedback circuit is required. Undeland snubber in [15] has a relatively simple structure, but it requires additional circuits of regenerative and dissipative. Active-clamping circuit in [16] provides zero-voltage switching conditions for all switches, but voltage stress of power devices is increased higher than the dc-link voltage.…”

Section: Power Loss Analysismentioning

confidence: 99%

“…It achieves higher power efficiency than does the conventional inverter. Also, the advantages of the proposed inverter are compared with not only conventional inverter but also other approaches [13][14][15][16]. The proposed inverter is better than others in respect of the number of components, switching-power loss, and efficiency.…”

Section: Introductionmentioning

confidence: 98%

“…Especially, the SiC schottky diodes have been used for the freewheeling diodes of the conventional inverter because they do not have reverse-recovery problem [11]. However, in a practical design, the SiC schottky diodes exhibited current overshoots and voltage oscillations due to the resonant RLC circuit formed between the diode To minimize the switching-power losses, additional snubber circuits are required, as described in [13][14][15][16]. They can be classified into two cases-passive snubber circuits [13,14] and active snubber circuits [15,16].…”

Section: Introductionmentioning

confidence: 99%

“…However, in a practical design, the SiC schottky diodes exhibited current overshoots and voltage oscillations due to the resonant RLC circuit formed between the diode To minimize the switching-power losses, additional snubber circuits are required, as described in [13][14][15][16]. They can be classified into two cases-passive snubber circuits [13,14] and active snubber circuits [15,16]. The RC snubber circuit presented in [13] dissipates the switching-power losses, reducing the power efficiency of the inverter.…”

Section: Introductionmentioning

confidence: 99%

“…However, the passive lossless snubber circuit requires many passive components and increases system complexity and cost. The snubber circuit in [15] uses a capacitor to store the energy due to switching losses. This solution is attractive because of its simple circuit structure and reduced component count.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Power Efficiency Improvement of Three-Phase Split-Output Inverter Using Magnetically Coupled Inductor Switching

Yang

Choi

2019

Electronics

View full text Add to dashboard Cite

The conventional three-phase split-output inverter (SOI) has been used for grid-connected applications because it does not require dead time and has no shoot-through problems. Recently, the conventional inverter uses the silicon carbide (SiC) schottky diodes for the freewheeling diodes because of its no reverse-recovery problem. Nevertheless, in a practical design, the SiC schottky diodes suffer from current overshoots and voltage oscillations. These overshoots and oscillations result in switching-power losses, decreasing the power efficiency of the inverter. To alleviate this drawback, we present a three-phase SOI using magnetically coupled inductor switching technique. The magnetically coupled inductor switching technique uses one auxiliary diode and coupled inductor for each switching leg in the three-phase SOI. By the operation of the coupled inductor, the main diode current is shifted to the auxiliary diode without the reverse-recovery process. The proposed inverter reduces switching-power losses by alleviating current overshoots and voltage oscillations of SiC schottky diodes. It achieves higher power efficiency than the conventional inverter. We discuss experimental results for a 1.0 kW prototype inverter to verify the performance of the proposed inverter.

show abstract

Section: Power Loss Analysismentioning

confidence: 99%