Reducing IGBT losses in ZCS series resonant converters

This paper presents a resonant non-inverting buck-boost converter in which all switches operate under ZCS conditions. In a symmetric configuration, a CLL resonant tank along with an inverter arm and a rectifying diode are employed. The diode is turned off at ZCS and hence the problem of its reverse recovery is obviated also. As a result switching losses and EMI are reduced and switching frequency can be increased. The converter can work at DCM and CCM depend on the switching frequency and the load-current. Experimental results from a 200W/200KHz laboratory prototype verify operation of the proposed converter and the presented theoretical analysis.

show abstract

“…w a a --= - (27) Mode III-V (t 3 -t 6 ): All other operating modes are exactly the same as those of DCM. Fig.…”

Section: Z I T R R T T V Rmentioning

confidence: 85%

“…The spiky currents appeared at turn-on instants are due to the output capacitance of the switches. This is a well-known phenomenon of ZCS bridge structures and can be eliminated easily [27]. Q 1 is turned off at ZCS and Q 2 is turned off at ZVZCS.…”

Section: Resultsmentioning

confidence: 99%

Resonant CLL Non-Inverting Buck-Boost Converter

Jabbari¹,

Sharifi²,

Shahgholian³

2013

Journal of Power Electronics

View full text Add to dashboard Cite

show abstract

“…The voltage spikes that appeared across the switches during guard-time are due to the parasitic output capacitance of the switches. This phenomenon also exists in series-resonant converters and can be resolved easily by placing a small RCD snubber across the switches if it is deemed necessary [4]. The soft-switching operations of Q 2 and Q 1 are shown in Figs.…”

Section: Resultsmentioning

confidence: 99%

“…Among the various resonant converters presented in the literature, the well-known seriesresonant converter (SRC) has the nearest structure and operation to the proposed converters [1], [4], [8], [9]. Two conventional SRCs are the half-bridge (HB) and full-bridge (FB) types.…”

Section: Comparisonmentioning

confidence: 99%

“…An insulated gate bipolar transistor (IGBT) is an appropriate switch for power applications. The ZCS technique is more compatible with the IGBT characteristics since it makes the tailing-current irrelevant [4]. In order to decrease current stresses and conduction losses, unnecessary energy circulation should be prevented and hence unidirectional switches such as the reverse-blocking IGBT (RB-IGBT) can be employed [5]- [7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Isolated Topologies of Switched-Resonator Converters

Jabbari¹,

Farzanehfard²,

Shahgholian³

2010

Journal of Power Electronics

View full text Add to dashboard Cite

Switched-resonator converters are a new family of soft switching DC-DC converters where the energy is transferred via a resonator. This paper introduces some isolated topologies of this family. The achieved advantages include, load independent soft-switching, self short-circuit protection, and optimization capability due to topology variety. Compared to conventional seriesresonant converters, outstanding advantages such as a smaller fewer number of switches and diodes, a smaller transformer, and lower current stresses are achieved. A general synthesis scheme, functional topologies, and essential relations are included. Experimental results from a laboratory prototype confirm the presented theoretical analysis.

show abstract

Double‐boost switched‐resonator converter

Jabbari

Tehrani²

2018

IET Power Electronics

View full text Add to dashboard Cite

A new high-efficiency resonant boost converter is presented. The topology is a hybrid circuit between switchedresonator and switched-capacitor converters. The proposed converter can efficiently provide voltage conversion ratio between 1 and 2. The voltage gain is adjustable, and full-range zero-current switching operation is provided for switches independent from operating voltages and load power. The structure is formed by an inverter arm without employing any additional switch in the circuit. Passive elements are all high-frequency resonant type and then small size realisation is possible. The converter stability is guaranteed. Complete theoretical analysis along with simulation and practical results are presented. Finally, the converter is compared with its most recent counterparts.

show abstract

Reducing IGBT losses in ZCS series resonant converters

Cited by 6 publications

References 10 publications

Resonant CLL Non-Inverting Buck-Boost Converter

Resonant CLL Non-Inverting Buck-Boost Converter

Isolated Topologies of Switched-Resonator Converters

Double‐boost switched‐resonator converter

Contact Info

Product

Resources

About