Soft-switching techniques in PWM converters

Hua, Guichao; Lee, F.C.

doi:10.1109/41.475500

Cited by 283 publications

(102 citation statements)

References 17 publications

Supporting

Mentioning

102

Contrasting

Order By: Relevance

“…The value of R1=1.2kΩ.The value of R2 is determined from (6).The value of V ref is normally less than desired output. This value is fixed depending on the output voltage obtained.…”

Section: Design Considerationmentioning

confidence: 99%

“…The auxiliary circuit consists of one switch, one resonant inductor and two resonant capacitors. The zero voltage switching (ZVS) turn on or zero current switching (ZCS) turn off is achieved by using resonant converter [4][5][6][7] based on resonant inductor and resonant capacitor. The control signal obtained by taking a portion of the output voltage is provided to the gate drive.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Efficiency and Power Factor improvement of Bridgeless Softswitched PWM Cuk Converter using Multiplier control approach

Sahoo¹

2013

IOSR-JEEE

View full text Add to dashboard Cite

“…The value of R1=1.2kΩ.The value of R2 is determined from (6).The value of V ref is normally less than desired output. This value is fixed depending on the output voltage obtained.…”

Section: Design Considerationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Efficiency and Power Factor improvement of Bridgeless Softswitched PWM Cuk Converter using Multiplier control approach

Sahoo¹

2013

IOSR-JEEE

View full text Add to dashboard Cite

“…The FCQDL converter (Abeyratne & Aydemir, 1994) implemented in this topology produces the required current pulse stream through a zero-current switching mechanism (Hua & Lee, 1995). A current voltage reaches its rated value (i.e.…”

Section: Methodsmentioning

confidence: 99%

“…The proposed methodology implements a fast charging mechanism for high capacity losses. The switching losses are minimised through a FCQDL converter (Abeyratne & Aydemir, 1994), which enables zero-current switching (Hua & Lee, 1995). This permits fast charging while maintaining a higher to maintain precise CC-CV operation.…”

Section: Effect Of Pulse Charging On Batteriesmentioning

confidence: 99%

Zero-current-switching pulse charger for high capacity batteries in renewable energy applications

Abeyratne

Perera²,

Jayakody³

et al. 2016

J. Natn. Sci. Foundation Sri Lanka

View full text Add to dashboard Cite

Fast charging of high capacity batteries is of great concern, especially in renewable energy and electric vehicle (EV) applications. Pulse charging has become the preferred method for fast charging with heavy currents. However, it presents drawbacks due to switching losses involved in hardswitching of semiconductor devices. This paper presents a soft switched pulse charging mechanism for high capacity Pb-acid and Li-ion batteries, which minimises switching losses that makes the methodology very suitable for implementing the National Electric Code (NEC) level-1, level-2 chargers or specially the level-3 charger more conveniently for EVs. The fully clamped quasi-resonant DC link (FCQDL) converter generates current pulses to charge the battery in a zero-current switching (ZCS) manner to minimise switching losses. The simulated and experimental results show that the proposed charger can implement constant current (CC) and constant voltage (CV) modes of charging. The experimental results show that the proposed charging methodology reduces the charging time of Pb-acid batteries by 14.01 % in contrast to the conventional CC-CV charging method. Furthermore, discharging curves for the conventional and pulse charging methods are compared to evaluate the effective useful charge that is put into the battery. The results reveal that the effective use of pulse charging.

show abstract

“…Soft switching techniques can be classified into two groups: zero voltage switching (ZVS) and zero current switching (ZCS) (Hua and Lee, 1995). In the literature, there are a few reviews of soft switching inverters (Bellar et alli, 1998;Pickert and Johnson, 1999;Johnson and Pickert, 1999).…”

Section: Introductionmentioning

confidence: 99%

A new ZCZVT commutation cell for PWM DC-AC converters

Stein

Hey

Pinheiro

et al. 2004

Sba Controle & Automação

View full text Add to dashboard Cite

This paper proposes a new auxiliary commutation cell for PWM inverters that allows the main switches to be turned on and off at zero voltage and zero current. The main switches zero current turn-on reduces the undesired effects of parasitic inductances related to the circuit layout. The main diodes reverse recovery losses are minimized since di/dt and dv/dt are controlled. The ZCZVT commutation cell is located out of the main power path of the converters and is activated only during switching transitions. Additionally, the auxiliary switches are turned on and off at ZCS and use the same ground signals of the upper main switches. The commutation losses are practically reduced to zero. Soft switching operation is guaranteed for full load range without changes in command strategy. The operation of the ZCZVT PWM full-bridge DC-AC Converter is analyzed and an auxiliary commutation cell design procedure based on the analysis is proposed. Experimental results are presented to demonstrate the feasibility of the proposed commutation cell. RESUMOEste artigo propõe um novo circuito auxiliar para inversores PWM que permite que a entrada em condução e o bloqueio das chaves principais ocorram com corrente e tensão nulas. A entrada em condução das chaves principais com corrente nula reduz os efeitos indesejados referentesàs indutâncias intrínsecas do circuito. Uma vez que o circuito auxiliar controla o di/dt e o dv/dt, as perdas de recuperação reversa dos diodos principais são minimizadas. A célula de comutação ZCZVT, ativada somente durante as comutações,é localizada fora do caminho principal do fluxo de potência. Adicionalmente, as chaves auxiliares comutam em ZCS e usam o mesmo sinal de terra das chaves principais superiores. Devidò a ação do circuito auxiliar, as perdas de comutação são praticamente eliminadas. A operação com comutações suavesé garantida para toda a faixa de carga sem mudanças na estratégia de comando. A operação de um inversor ponte-completa ZCZVT PWMé analizada e, baseado nesta análise,é proposto um procedimento de projeto do circuito auxiliar. Para demonstrar a viabilidade do circuito de comutação proposto, são apresenta- dos resultados experimentais obtidos em um protótipo. PALAVRAS-CHAVE:Inversor, comutação suave, ZCZVT.

show abstract

Soft-switching techniques in PWM converters

Cited by 283 publications

References 17 publications

Efficiency and Power Factor improvement of Bridgeless Softswitched PWM Cuk Converter using Multiplier control approach

Efficiency and Power Factor improvement of Bridgeless Softswitched PWM Cuk Converter using Multiplier control approach

Zero-current-switching pulse charger for high capacity batteries in renewable energy applications

A new ZCZVT commutation cell for PWM DC-AC converters

Contact Info

Product

Resources

About