EPE Association: EPE-PEMC 2004 - Topic 06-5: DC power supply (hard & soft switching)

EPE-PEMC 2004 - Topic 06-5: DC power supply (hard & soft switching)
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2004 - Conference > EPE-PEMC 2004 - Topic 06: POWER SUPPLY > EPE-PEMC 2004 - Topic 06-5: DC power supply (hard & soft switching)

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   Analysis Of The Input Current Of The Capacitor-Filter Single-Phase Rectifier
By M. J. Case, H. C. V. Z. Pienaar [View]
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Abstract: An extension of the fundamental theory of the capacitor-filter rectifier is presented. Expressions are obtained for the calculation of input power factor. Single-phase and three-phase circuits are considered. The input power factor is shown to be leading.

   Current-Mode Controlled Dc Source For Arc Welding
By Jaroslav Dudrik [View]
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Abstract: The current-mode controlled dc source for arc welding is described in the paper. The arc welder is based on switch-mode dc-dc power supply utilising current-mode control for improving working performance of the current source. The switching power losses are decreased to minimum using non dissipative turn-off snubber. The high efficiency over 80% is achieved at nominal current of 120A.

   Design Methodology For Active Clamped Switched Mode Power Supplies Using Digital Signal Processors
By M. Roch, J. Lutz, W. Schreiter [View]
[Download]

Abstract: This paper is about a design methodology to reduce the complexity in the development process of switched mode power supplies with digital signal processors. It is based on automatic processes to dimension the components of the power circuit and also on a unified hardware environment for the control. The methodology is exemplarily realized for a 150 Watt forward converter with an active clamp circuit. The design of the test hardware was realized after the analytical calculation and simulation, by using a secondary sided digital signal processor (DSP). Finally, practical measurements were. Zero voltage switching is required to reduce the switching losses at a pulse frequency of 100 kHz.

   Soft-Switching High Voltage Converter With Wide Input Voltage Range, Power Factor Correction And Galvanic Isolation
By Rastislav Havrila, Ivan Lokseninec [View]
[Download]

Abstract: The paper deals with the static converter with the power factor corrector circuit and galvanic isolation via high frequency power transformer. Applications of this type of the converter are also discussed. The converter should be connected to DC or AC power supply. Input voltage range is from 700V to 3600V AC and from 1000V to 4200V DC. Input voltage frequency range is from 14Hz to 52Hz. Output voltage is stabilized to 700V DC and output power is 54kW. The control system is realized using digital signal processor. Converter is designed according to UIC550 code. Simulation and experimental results are presented

   The New Technique For Low Power Consumption Of Power Supply
By Jin-Ho Choi, Young-Cheol Ryu [View]
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Abstract: SMPS losses consist of switching loss, conduction loss, and core loss. In case of light load the switching loss takes the most things in SMPS. Conventional burst mode operation meets the requirement of low power consumption. But, it is not sufficient for Low frequency switching at no-load condition to provide the source of IC’s Bias. High frequency switching increases switching loss of SMPS. Moreover recently lower stand-by power, the input power of about 0.09mW at the no-load condition, is required. This paper presents that during the burst mode decreasing IC’s consumption power at the internal block makes system high efficient and prevents malfunction at the minimum load.

EPE-PEMC 2004 - Topic 06-5: DC power supply (hard & soft switching)
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2004 - Conference > EPE-PEMC 2004 - Topic 06: POWER SUPPLY > EPE-PEMC 2004 - Topic 06-5: DC power supply (hard & soft switching)
	[return to parent folder]

	Analysis Of The Input Current Of The Capacitor-Filter Single-Phase Rectifier By M. J. Case, H. C. V. Z. Pienaar	[View] [Download]
Abstract: An extension of the fundamental theory of the capacitor-filter rectifier is presented. Expressions are obtained for the calculation of input power factor. Single-phase and three-phase circuits are considered. The input power factor is shown to be leading.

	Current-Mode Controlled Dc Source For Arc Welding By Jaroslav Dudrik	[View] [Download]
Abstract: The current-mode controlled dc source for arc welding is described in the paper. The arc welder is based on switch-mode dc-dc power supply utilising current-mode control for improving working performance of the current source. The switching power losses are decreased to minimum using non dissipative turn-off snubber. The high efficiency over 80% is achieved at nominal current of 120A.

	Design Methodology For Active Clamped Switched Mode Power Supplies Using Digital Signal Processors By M. Roch, J. Lutz, W. Schreiter	[View] [Download]
Abstract: This paper is about a design methodology to reduce the complexity in the development process of switched mode power supplies with digital signal processors. It is based on automatic processes to dimension the components of the power circuit and also on a unified hardware environment for the control. The methodology is exemplarily realized for a 150 Watt forward converter with an active clamp circuit. The design of the test hardware was realized after the analytical calculation and simulation, by using a secondary sided digital signal processor (DSP). Finally, practical measurements were. Zero voltage switching is required to reduce the switching losses at a pulse frequency of 100 kHz.

	Soft-Switching High Voltage Converter With Wide Input Voltage Range, Power Factor Correction And Galvanic Isolation By Rastislav Havrila, Ivan Lokseninec	[View] [Download]
Abstract: The paper deals with the static converter with the power factor corrector circuit and galvanic isolation via high frequency power transformer. Applications of this type of the converter are also discussed. The converter should be connected to DC or AC power supply. Input voltage range is from 700V to 3600V AC and from 1000V to 4200V DC. Input voltage frequency range is from 14Hz to 52Hz. Output voltage is stabilized to 700V DC and output power is 54kW. The control system is realized using digital signal processor. Converter is designed according to UIC550 code. Simulation and experimental results are presented

	The New Technique For Low Power Consumption Of Power Supply By Jin-Ho Choi, Young-Cheol Ryu	[View] [Download]
Abstract: SMPS losses consist of switching loss, conduction loss, and core loss. In case of light load the switching loss takes the most things in SMPS. Conventional burst mode operation meets the requirement of low power consumption. But, it is not sufficient for Low frequency switching at no-load condition to provide the source of IC’s Bias. High frequency switching increases switching loss of SMPS. Moreover recently lower stand-by power, the input power of about 0.09mW at the no-load condition, is required. This paper presents that during the burst mode decreasing IC’s consumption power at the internal block makes system high efficient and prevents malfunction at the minimum load.