New high power DC-DC converter with loss limited switching and lossless secondary clamp

Bendre, A.; Norris, Seán; Divan, D.M.; Wallace, I.; Gascoigne, R.W.

doi:10.1109/tpel.2003.813748

Cited by 27 publications

(7 citation statements)

References 14 publications

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“…The rectification process is one of the important steps in welding process and in most of the industrial applications. Generally, the diode bridge rectifier is used for rectification [1–6]. As the rectification process injects harmonics at the utility side, the input power factor (PF) becomes low.…”

Section: Introductionmentioning

confidence: 99%

“…The PFC topologies introduced in [7, 8], use a single switch boost type topology due to its cost and simplicity. The isolated DC–DC converters [6, 16–24] are mostly used in welding applications which consists of switching converter, high frequency transformer and rectifier with filter. The completion of welding process needs very high in‐flow current (several hundred amperes) which necessitates of precise regulation of current to give desired completion of process.…”

Section: Introductionmentioning

confidence: 99%

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Design and development of improved power quality based micro‐butt welding power supply

Madhulingam

Subbaiyan²,

Shanmugam

et al. 2017

IET Power Electronics

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This study proposes a suitable DC-DC converter topology with improved power quality at the input side for micro-butt welding machine by evaluating different power factor correction (PFC) techniques and DC-DC converter topologies. Firstly, different control strategies of boost converters such as peak current controlled PFC, average current controlled PFC and hysteresis current controlled PFC are discussed for minimising input current distortions and improving the power quality. Also, the current loop gain stability analyses are presented using small-signal model for selecting the best model and optimisation of the same. Secondly, the important key parameters such as cost, size, weight, complexity in implementation and other application dependent parameters of various isolated type of DC-DC converter topologies are compared and the best DC-DC converter topology is selected for the proposed application. Finally, the modelling and stability analysis is performed on the DC-DC converter and optimisation is achieved for the welding current controller. The software packages MATLAB/Plecs/OrCAD PSpice are used for simulation and implementation of the desired circuitry with optimised design. A prototype has been developed based on optimised design, hysteresis current controller for PFC and DC-DC converter; and the control algorithm is implemented DSP TMS320F2812 and the experimental results were discussed. 2 DC-DC converter topologies for micro-butt welding The DC-DC converter consists of inverter, high frequency transformer (HFT), rectifier and filter. The primary requirements of welding power supply are galvanic isolation from main supply, DC current (150-600 A) regulation with max of 5 V and capability to withstand during the short-circuit condition. The general criteria for selection of DC-DC converter are cost, weight, size and ease of

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and development of improved power quality based micro‐butt welding power supply

Madhulingam

Subbaiyan²,

Shanmugam

et al. 2017

IET Power Electronics

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show abstract

“…The FB converter can achieve soft‐switching by using phase‐shift control and snubber capacitors [10]. Although losses are reduced, system complexity is increased.…”

Section: Introductionmentioning

confidence: 99%

Current output hard‐switched full‐bridge DC/DC converter for wind energy conversion systems

Fan

et al. 2014

IET Renewable Power Generation

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A current output hard-switched full-bridge (HSFB) converter is presented with an intermediate high-frequency transformer as an option of a wind energy conversion system (WECS). The wind turbine simulator, based on an induction machine driving a three-phase permanent magnet synchronous generator, simulates practical wind turbine characteristics. A comparative analysis of electrical stresses on the switches of the boost converter and the current output HSFB converter is carried out at different wind speeds and maximum operational power point based on their mathematical models. The control system of the current output HSFB converter is illustrated. Then two dynamic responses of the combined mechanical and electrical systems of the WECS are investigated, under wind speed step changes. Simulation and experimental results demonstrate the feasibility and stability of a current output HSFB converter-based WECS.

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“…To overcome the aforementioned problems, several energy recovery clamp circuits (ERCC) have been proposed recently [4]- [8]. Fig.…”

mentioning

confidence: 99%

“…Fig. 5 shows another example of an ERCC proposed in [8]. This circuit works only when V sec is less than V o ( D > 0.5) and the Vrec-pk is clamped to V o • However, when V sec is higher than V o (D < 0.5), this circuit does not work.…”

mentioning

confidence: 99%

An improved energy recovery clamp circuit for PWM converters with a wide range of input voltage

Cha

Chen

Peng

et al. 2007

2007 7th Internatonal Conference on Power Electronics

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A full-bridge dc-de converter employing diode rectifier in the output experiences severe voltage overshoot and oscillation problem across the diode rectifier caused by the interaction between the junction capacitance of the rectifier diode and the leakage inductance of transformer. The pronounced reverse-recovery current of high power diodes enforces these issues significantly by increasing power loss and voltage overshoot. Conventional energy recovery clamping circuits suffer from high voltage overshoot if the input voltage of converter is wide. In this work, a novel energy recovery clamp circuit is proposed to overcome this problem. Performance of the proposed circuit is verified both theoretically and experimentally with a 70 kW dc-de converter.

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New high power DC-DC converter with loss limited switching and lossless secondary clamp

Cited by 27 publications

References 14 publications

Design and development of improved power quality based micro‐butt welding power supply

Design and development of improved power quality based micro‐butt welding power supply

Current output hard‐switched full‐bridge DC/DC converter for wind energy conversion systems

An improved energy recovery clamp circuit for PWM converters with a wide range of input voltage

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