ZVZCS, dual, two-transistor forward DC-DC converter with peak voltage of Vin/2, high input and high power application

Ghodke, D. V.; Muralikrishnan, K.

doi:10.1109/psec.2002.1023080

Cited by 27 publications

(4 citation statements)

References 9 publications

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“…These advantages include automatic voltage spike clamping and demagnetization through diodes connected to the switching devices. Dual TTF DC/DC converters with all of the windings sharing one transformer can be fed from input DC voltage, but each of them are coupled through a magnetizing field and as a result they can not been called truly modular converters from an architecture point of view [11]. Control implementation for ISOP DC/DC converters using analogy circuits is time consuming and inflexible [2]- [11].…”

Section: Introductionmentioning

confidence: 99%

“…Dual TTF DC/DC converters with all of the windings sharing one transformer can be fed from input DC voltage, but each of them are coupled through a magnetizing field and as a result they can not been called truly modular converters from an architecture point of view [11]. Control implementation for ISOP DC/DC converters using analogy circuits is time consuming and inflexible [2]- [11]. With the emergence of digital signal processors (DSP), digital control is becoming a potentially attractive alternative to the analogy option due to its inherent advantages [12], [13].…”

Section: Introductionmentioning

confidence: 99%

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Digital Control Strategy for Input-Series-Output-Parallel Modular DC/DC Converters

Sha¹,

Guo²,

Liao³

2010

Journal of Power Electronics

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Input-series-output-parallel (ISOP) converters consisting of multiple modular DC/DC converters can enable low voltage rating switches to be used under high voltage input applications. This paper presents a digital control strategy, which can achieve equal sharing of input voltage for a modular ISOP system consisting of two-transistor forward DC/DC converters by forcing the input voltages of neighboring modules to be equal. The proposed scheme is analyzed using small signals analysis based on the state space average method. The performance of the proposed control strategy is verified with an experimental prototype of an ISOP converter made up of three two-switch forward converters.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Digital Control Strategy for Input-Series-Output-Parallel Modular DC/DC Converters

Sha¹,

Guo²,

Liao³

2010

Journal of Power Electronics

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“…Reliability is of overriding importance in a power supply design, and in any weighing of reliability versus initial cost, the best and, in the long run, least expensive choice is reliability. Therefore, two-transistor forward converter is more reliable and attracted attention of great research, but this topology has drawback of hard switching and single quadrant operation of transformer [5] A new topology of two-transistor Forward converter, shown in Fig. 1, using two primary windings, is proposed in this paper.…”

Section: Introductionmentioning

confidence: 99%

Double Forward Converter With Simetrical Output Voltage and Soft Swtiching

2010

Anais Congresso Brasileiro De Energia Solar - CBENS

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This paper presents a new topology of soft-switching two-switch Forward converter associated to a quadratic Boost converter, which provides large voltage step-up (from 12Vdc to 80Vdc). The combination of the stages results in a switched-mode power supply (SMPS), whose output voltages are +200Vdc and -200Vdc. The inverter put in these converter is very fast and simple, because it has a little components quantity, and this form can be said that this control is very robust, and in the other side, the control presents a low cost. The little volume presented in this converter present other important thing, because it has a small volume and this form, have a big energy density. The operation of this converters are analyzed, as some results concerning the proposed SMPS with output AC are presented.

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“…However, fly-back converters, in general, are not optimal for higher input voltage levels and usually also show a rather low efficiency. The concept of a series arrangement of SMPS cells, however, can also be extended to forward converters [10][11][12][13] as well as to resonant concepts. In [14], an SMPS topology especially suited for high input voltages has been reported consisting of self-oscillating series-resonant converter cells.…”

Section: Introductionmentioning

confidence: 99%

Active voltage balancing of DC-link electrolytic capacitors

2008

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DC voltage links of three-phase power converters are frequently equipped with a series connection of two electrolytic capacitors because of high voltage level. For such a configuration, usually resistors have to be arranged in parallel to each capacitor in order to balance the partial voltages. These balancing resistors, however, have to be dimensioned regarding the worst-case scenario of capacitor's leakage currents; such leakage can lead to high permanent dissipative losses that also appear in case of low actual leakage currents. To avoid these losses to a very large extent, a novel low-cost and robust active unit for replacing the passive balancing resistors is introduced. The paper describes the operating principle of the circuit, analyses the fundamental relationships relevant for the balancing characteristic and gives guidelines concerning component selection. Furthermore, simulation results as well as measurements taken from a laboratory prototype are presented.

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ZVZCS, dual, two-transistor forward DC-DC converter with peak voltage of Vin/2, high input and high power application

Cited by 27 publications

References 9 publications

Digital Control Strategy for Input-Series-Output-Parallel Modular DC/DC Converters

Digital Control Strategy for Input-Series-Output-Parallel Modular DC/DC Converters

Double Forward Converter With Simetrical Output Voltage and Soft Swtiching

Active voltage balancing of DC-link electrolytic capacitors

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