EPE Association: EPE-PEMC 2000 - Topic 01f: Power Converter Circuits and New Topologies

EPE-PEMC 2000 - Topic 01f: Power Converter Circuits and New Topologies
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 01: Power Converters > EPE-PEMC 2000 - Topic 01f: Power Converter Circuits and New Topologies

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   A New Active Front End Inverter with Regenerative Capability and Quasi-Resonant Operation
By Siebel H., Pacas J.M. [View]
[Download]

Abstract: A new three-phase soft-switching rectifier is presented. The topology consists of a quasi resonant PWM boost converter with an additional resonant branch, which provides low loss at high frequency operation. A high power factor can be achieved also for distorted line voltages due to a new control strategy.

   Buck-Boost AC-AC Voltage Controllers
By Obuhov A.E., Otchenash B.A., Zinoviev G.S. [View]
[Download]

Abstract: Offered new class of buck-boost AC voltage controllers (VC) are investigated. Buck-boost controllers has become possible at introduction in the AC-AC converters with the switches in addition to the energy storage inductors and capacitors, and also due to pulse-width control by energy interchanging between them, similary to appropriate DC-DC converters. The unified direct methods of calculation of such VC is developed. The mathematical models of the VC are constructed, the main characteristics are obtained which are checked by simulation. New controllers especially suit for AC power conditioners and as the soft starters for induction motors too.

   Design of Series Resonant Converter with Sandwich - Type Piezoelectric Ceramic Transducer
By Fabijañski P., Lagoda R. [View]
[Download]

Abstract: Sandwich type piezoelectric ceramic transducers are the most frequently applied source of ultrasounds in technical cleaning system. They have the ability to radiate in an ultrasonic medium, e.g. water, with maximum accoustic power when the vibration is activated by a current whose frequency equals the mechanical resonance frequency of the transducer. In resonant inverters the transducer units are part of the oscilating circuit, for which equivalent electrical circuit consist of connection in parallel: Co end Lp, Cp, Rp. The resonant frequuency of the real circuit varies during the operation in function of many parameters, among others, the most important are temperature, time, the column of cleaning factor, and the surface of the cleaned elements. In this situation, to obtain the maximum value of the converter efficiency, its important role of fuzzy logic control system to assure the optimal mechanical resonant frequencies of converter.

   Method of Oscillations Stabilisation of Parallel Resonant Converter Fedded Directly from the One-Phase and Three-Phase AC Net
By Bogdan A. [View]
[Download]

Abstract: An operation and method of control of the AC link used in power conversion system is presented in the article. Particularly, there are discussed abilities of the converter devices switching with zero voltage and the method of the oscillating link voltage control by the pulse density modulation. Presented problems are confirmed by the results of the laboratory model investigations.

   Resonant Snubber with Auxiliary Switches for PWM Inverter
By Flajžík P., Krištof R., Ráèek V. [View]
[Download]

Abstract: The presented inverter offer the potential for reduced switching loss through the use of zero-voltage and zero-current switching of all of the semiconductors in the inverter while still maintaining true PWM control. Reduced switching loss allows the inverter operate at high switching frequencies while the reduced dv/dt and di/dt help to reduce electromagnetic compatibility problems. Both simulation and experimental results are presented to show the superior performance in efficiency improvement and du/dt reduction of the proposed soft-switching inverter.

   Single Stage PFC with Active Clamp
By Fraidlin S., Frolov A.*, Polikarpov A. [View]
[Download]

Abstract: This paper presents a single stage PFC converter that exhibits numerous advantages: efficient ZVS operation, clamping and lossless recovery of the transformer leakage related energy, inherently controllable inrush current, lower output ripple with a given output capacitance, low THD. The circuit utilizes a single magnetic structure while exhibiting CCM operation at the output. The experimental prototype demonstrates high efficiency, low THD, and good load regulation.

   Steady-State Analysis and Large-Signal Modelling of the Half-Bridge Quantum Series-Parallel Resonant Converter
By Castilla M., García de Vicuna L., López M., López O., Matas J. [View]
[Download]

Abstract: An averaged large-signal model of the half-bridge quantum series-parallel resonant converter operating in continuous conduction mode is developed and verified using cycle-by-cycle simulations. The model can be used to both derive simple design tools under steady-state conditions and predict large-signal transient responses by using any modern circuit simulator.

   Through-Mode Problem Analysis on ICB Energy Transfer Circuit
By Baba J., Nitta T., Shirai Y.*, Hayashi Y., Kobayashi Y.* [View]
[Download]

Abstract: Power converter for the most superconducing magnet application is required large capacity and high response. To meet these requests, Inverter-Converter Bridge (ICB) energy transfer circuit has been studied as an exciter circuit for superconducting magnets. Converters used in ICB circuit are ones of natural commutation current source type. This enables to satisfy above requirements. However, three problems have been known through the experimental results. These may be reasons why the circuit is not applied practically. In this paper, Through Mode problem, that is one of these three problems, is discussed and solved. The problem sometimes appears when the operation mode changes from ripple reduction operation to normal operation. To avoid this, two measures are proposed and these methods have been confirmed by experiments.

EPE-PEMC 2000 - Topic 01f: Power Converter Circuits and New Topologies
You are here: EPE Documents > 04 - EPE-PEMC Conference Proceedings > EPE-PEMC 2000 - Conference > EPE-PEMC 2000 - Topic 01: Power Converters > EPE-PEMC 2000 - Topic 01f: Power Converter Circuits and New Topologies
	[return to parent folder]

	A New Active Front End Inverter with Regenerative Capability and Quasi-Resonant Operation By Siebel H., Pacas J.M.	[View] [Download]
Abstract: A new three-phase soft-switching rectifier is presented. The topology consists of a quasi resonant PWM boost converter with an additional resonant branch, which provides low loss at high frequency operation. A high power factor can be achieved also for distorted line voltages due to a new control strategy.

	Buck-Boost AC-AC Voltage Controllers By Obuhov A.E., Otchenash B.A., Zinoviev G.S.	[View] [Download]
Abstract: Offered new class of buck-boost AC voltage controllers (VC) are investigated. Buck-boost controllers has become possible at introduction in the AC-AC converters with the switches in addition to the energy storage inductors and capacitors, and also due to pulse-width control by energy interchanging between them, similary to appropriate DC-DC converters. The unified direct methods of calculation of such VC is developed. The mathematical models of the VC are constructed, the main characteristics are obtained which are checked by simulation. New controllers especially suit for AC power conditioners and as the soft starters for induction motors too.

	Design of Series Resonant Converter with Sandwich - Type Piezoelectric Ceramic Transducer By Fabijañski P., Lagoda R.	[View] [Download]
Abstract: Sandwich type piezoelectric ceramic transducers are the most frequently applied source of ultrasounds in technical cleaning system. They have the ability to radiate in an ultrasonic medium, e.g. water, with maximum accoustic power when the vibration is activated by a current whose frequency equals the mechanical resonance frequency of the transducer. In resonant inverters the transducer units are part of the oscilating circuit, for which equivalent electrical circuit consist of connection in parallel: Co end Lp, Cp, Rp. The resonant frequuency of the real circuit varies during the operation in function of many parameters, among others, the most important are temperature, time, the column of cleaning factor, and the surface of the cleaned elements. In this situation, to obtain the maximum value of the converter efficiency, its important role of fuzzy logic control system to assure the optimal mechanical resonant frequencies of converter.

	Method of Oscillations Stabilisation of Parallel Resonant Converter Fedded Directly from the One-Phase and Three-Phase AC Net By Bogdan A.	[View] [Download]
Abstract: An operation and method of control of the AC link used in power conversion system is presented in the article. Particularly, there are discussed abilities of the converter devices switching with zero voltage and the method of the oscillating link voltage control by the pulse density modulation. Presented problems are confirmed by the results of the laboratory model investigations.

	Resonant Snubber with Auxiliary Switches for PWM Inverter By Flajžík P., Krištof R., Ráèek V.	[View] [Download]
Abstract: The presented inverter offer the potential for reduced switching loss through the use of zero-voltage and zero-current switching of all of the semiconductors in the inverter while still maintaining true PWM control. Reduced switching loss allows the inverter operate at high switching frequencies while the reduced dv/dt and di/dt help to reduce electromagnetic compatibility problems. Both simulation and experimental results are presented to show the superior performance in efficiency improvement and du/dt reduction of the proposed soft-switching inverter.

	Single Stage PFC with Active Clamp By Fraidlin S., Frolov A., Polikarpov A.*	[View] [Download]
Abstract: This paper presents a single stage PFC converter that exhibits numerous advantages: efficient ZVS operation, clamping and lossless recovery of the transformer leakage related energy, inherently controllable inrush current, lower output ripple with a given output capacitance, low THD. The circuit utilizes a single magnetic structure while exhibiting CCM operation at the output. The experimental prototype demonstrates high efficiency, low THD, and good load regulation.

	Steady-State Analysis and Large-Signal Modelling of the Half-Bridge Quantum Series-Parallel Resonant Converter By Castilla M., García de Vicuna L., López M., López O., Matas J.	[View] [Download]
Abstract: An averaged large-signal model of the half-bridge quantum series-parallel resonant converter operating in continuous conduction mode is developed and verified using cycle-by-cycle simulations. The model can be used to both derive simple design tools under steady-state conditions and predict large-signal transient responses by using any modern circuit simulator.

	Through-Mode Problem Analysis on ICB Energy Transfer Circuit By Baba J., Nitta T., Shirai Y., Hayashi Y., Kobayashi Y.	[View] [Download]
Abstract: Power converter for the most superconducing magnet application is required large capacity and high response. To meet these requests, Inverter-Converter Bridge (ICB) energy transfer circuit has been studied as an exciter circuit for superconducting magnets. Converters used in ICB circuit are ones of natural commutation current source type. This enables to satisfy above requirements. However, three problems have been known through the experimental results. These may be reasons why the circuit is not applied practically. In this paper, Through Mode problem, that is one of these three problems, is discussed and solved. The problem sometimes appears when the operation mode changes from ripple reduction operation to normal operation. To avoid this, two measures are proposed and these methods have been confirmed by experiments.