EPE Association: EPE-PEMC 2000 - Topic 01a: Soft Switching Converters

EPE-PEMC 2000 - Topic 01a: Soft Switching Converters
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 01a: Soft Switching Converters

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   A Consideration on Soft Switching Inverter Using a Single Active Resonant Snubber for AC Motor Drive
By Yoshitsugu J., Ando M., Hiraki E., Inoue K.*, Nakaoka M. [View]
[Download]

Abstract: This paper presents an active auxiliary resonant DC link snubber circuit topology which achieves soft switching condition of single-phase or three-phase voltage-fed power conversion circuit for CVCF / VVVF inverter applications. The active auxiliary resonant DC link snubber circuit proposed here is evaluated and discussed on the basis of both simulation and experiment for single phase voltage-fed inverter.

   A Power-Factor-Correction Circuit with High-Frequency Resonant Energy Tank
By Hsieh Y.C., Chuang Y.C.*, Moo C.S. [View]
[Download]

Abstract: An approach of power-factor-correction (PFC) with a high-frequency resonant energy tank for the dc-link inverter is proposed. As compared with the conventional PFC techniques, this approach is advantageous of lower switching losses, lower current stress, and higher control flexibility. The proposed PFC circuit is implemented on a series resonant inverter as an illustrative example. The experimental results are provided to validate the theoretical analyses. It is proven that the PFC circuit can achieve nearly unity power factor and very low harmonic distortion.

   An Improved Soft-Switching Phase-Shifted PWM Full-Bridge DC-DC Converter
By Dudrík J., Dzurko P. [View]
[Download]

Abstract: A soft-switching full-bridge phase-shifted PWM converter using IGBT´s is proposed to improve the disadvantages of the previously presented converters. By adding active energy recovery snubber and auxiliary circuits zero-voltage and zero-current switching for all power switches is achieved for full load range. The principle of operation is explained and analysed. The simulation and experimental results are presented. The features and design considerations of the converter are verified on a 3 kW, 50 kHz IGBT based experimental circuit.

   Class C MOSFET Converter with Rectangular Gate Drive Waveform
By Grzesik B., Stenzel T. [View]
[Download]

Abstract: The analysis of Class CKB converter, controlled with rectangular gate drive waveform, and aimed at its characterisation by D-control characteristics, i.e. characteristics such as function of duty ratio. The analysis is based on piecewise linear model and laboratory measurements.

   Full Bridge Zero Voltage Switched Phase Shifted DC-DC Converter with Enlarged Duty Cycle and ZVS Range
By Beirante J.P.*, Borges B.V. [View]
[Download]

Abstract: This paper presents the complete theoretical analysis, simulation and design optimisation of a Full-Bridge Zero-Voltage-Switched Phase-Shift (FB-ZVS-PS) DC-DC converter with an LCC auxiliary circuit, working with a frequency of 250kHz and with an output power of 1kW. The converter uses a voltage capacitor divider to create half of the input voltage in one terminal of the auxiliary inductor. The voltage at the inductor terminals will, therefore, oscillate between -VI/2 and +VI/2, producing an additional current reinforcing the primary current during the passive-to-active transition and increasing the energy available to achieve ZVS. This way, it is possible to design FB-PS-ZVS DC/DC converter without using a commutating inductor in series with the power transformer, avoiding the problems related with the effective duty cycle reduction. Furthermore, it is shown that, by properly design of LCC circuit, the ZVS range and the effective-duty-cycle can be optimised, without significant overall penalties.

   Modified Forward Type Soft-Switching Trasition PWM Power Converter with Reduced Conduction Losses
By Gamage L., Morimoto T., Ando M., Abudulla M., Ishitobi M., Hamada S.*, Hiraki E., Nakaoka M. [View]
[Download]

Abstract: A novel prototype of zero-voltage and zero-current soft-switching PWM DC-DC power converter with low voltage and current stresses is presented for telecommunication energy plant in this paper. A new interleaved two switch forward converter topology is proposed to minimize circulating current with no additional auxiliary snubber circuits. This power converter includes some remarkable advantages such as reduced components, improved efficiency, high power density and cost effective configuration for high power conditioning and processing applications. The basic principle of operation is illustrated on the basis of steady-state analysis. Moreover, the feasible effectiveness of the proposed power converter topology is verified and evaluated by 500W-100kHz breadboard form a practical point of view.

   New Concept of Vector-Modulated Quasi-Resonant DC Link Inverter
By Chlebiš P. [View]
[Download]

Abstract: Soft switching of semiconductor switches enabled not only very low switching losses and higher power density but also good dv/dt of frequency inverters output voltage. The key idea is to reduce the device switching loses. In recent years presented topology of quasi resonant converters are very complicted and need complicted control methods. This paper presented a new concept of a quasi-resonant DC link converter topology for three phase AC drive with using vector modulation of output converter voltage.

   New Zero-Voltage-Transition PWM Converters with Zero Current Off Auxiliary Switches
By Xu Y., Wang Z. [View]
[Download]

Abstract: A family of new isolated soft-switching topologies are introduced in the paper, and their principles are analyzed. Prototypes of a 100W forward converter and a 1kW half bridge converter are made, and several experiments have been carried out to prove the usability of these topologies. Efficiency of the prototype is measured.

   Saber Simulation and Modelling of a Boost Soft Switching HF Link DC-AC-AC for Brushless Motor Control
By Gustin F., Bernot F., Berthon A. [View]
[Download]

Abstract: This paper presents simulation and experimental results of a double stage DC-AC-AC converter including a high frequency transformer link. It integrates soft switching techniques and is intended to be used for driving high voltage (400v) high power (18kW) synchronous brushless DC motor. Power switches used are IGBT transistors for the second stage and MOSFET for the first stage. The high frequency transformer allows low input voltage (for example 67v). For simulations, H.F transformer and synchronous motor models have been developed. The complete structure has been simulated using Saber software (Analogy Inc.), and tests with the transformer are presented.

   Three Phase Four Wire Shunt Active Filter for Power Factor Compensation for Asymmetric Networks
By Èeròan P., Ráèek V.*, Cesnak L. [View]
[Download]

Abstract: Measured results of an active filter are presented. The active filter controll algorithm is developed with a theory based on a new simple control algorithm of the three phase four wire shunt active filter. This control theory is excellent for power factor correction in the range from ones to tens of kVA.

   Three Phase Soft Commutation Inverter with High Frequency Transformer Assisted Resonant Snubbers
By Inaba C.Y., Hiraki E., Ohgaki S.*, Nakaoka M. [View]
[Download]

Abstract: In this paper, a high frequency transformer- assisted auxiliary active resonant commutation snubber (HFTA-ARCS) for voltage source power conversion circuits is proposed as compared with the conventional ARCS. A new three-phase voltage source soft switching inverter with HFTA-ARCS circuits in its three bridge legs has reduced current rating of auxiliary active switches and simplified control scheme without any boost current management required for soft switching. Its operation principle and control scheme are described and a design method of parameters on this HFTA-ARCS circuit is also discussed. Moreover, this soft switching inverter system with DSP-based digital control scheme is evaluated on the basis of computer simulation. The effectiveness of this inverter is proved by the simulation results.

   Transformer Parasitic Parameter - Assisted ZVS DC-DC Converter with Synchronous PWM Controlled Active ZCS Rectifier with Choke Input Smoothing Filter
By Morimoto T., Saitoh K., Ogura K., Mamun A.Al, Moiseyev S., Nakamura M., Nakaoka M. [View]
[Download]

Abstract: This paper presents a new prototype of phase-shifted ZVS DC-DC converter with a high frequency transformer link which has two active power switches in rectifier with choke input type smoothing filter The wide ZVS area at primary side and ZCS area at secondary side can be achieved by using parasitic inductor component of high-frequency transformer. Its operation principle and feature are explained and compared with those of the previously-developed ZVS-PWM DC-DC converter. The steady-state operating characteristics of the proposed converter topology are illustrated and discussed on the basis of the simulation results and experimental ones. Finally, The ZVS DC-DC Converter with an active ZCS-PWM rectifier with capacitor input type smoothing filter is explained in this paper.

   Voltage-Clamped Soft Switching High Voltage Converter for Microwave Oven and Utility AC Side Harmonic Current Control Scheme
By Matsushige T., Miyata E., Mamun A.Al, Rukonuzzaman M., Hiraki E., Nakaoka M., Bessyo D.*, Yasui K.*, Hirota I.*, Omori H.* [View]
[Download]

Abstract: This paper presents a new topology of the voltage-clamped ZVS-PWM high-frequency inverter-fed DC-DC converter designed for microwave oven. This paper also presents to improve line current distortion and power factor in utility AC power side. Because the anode current of the magnetron must not exceed 1.2[A] because of the lifetime of magnetron, a new topology of the voltage-clamped ZVS-PWM high-frequency inverter-fed DC-DC converter with an active voltage clamped capacitor and the duty factor regulated PWM is implemented and evaluated under conditions of suppressed peak value of the magnetron anode current.

EPE-PEMC 2000 - Topic 01a: Soft Switching Converters
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 01a: Soft Switching Converters
	[return to parent folder]

	A Consideration on Soft Switching Inverter Using a Single Active Resonant Snubber for AC Motor Drive By Yoshitsugu J., Ando M., Hiraki E., Inoue K., Nakaoka M.*	[View] [Download]
Abstract: This paper presents an active auxiliary resonant DC link snubber circuit topology which achieves soft switching condition of single-phase or three-phase voltage-fed power conversion circuit for CVCF / VVVF inverter applications. The active auxiliary resonant DC link snubber circuit proposed here is evaluated and discussed on the basis of both simulation and experiment for single phase voltage-fed inverter.

	A Power-Factor-Correction Circuit with High-Frequency Resonant Energy Tank By Hsieh Y.C., Chuang Y.C., Moo C.S.*	[View] [Download]
Abstract: An approach of power-factor-correction (PFC) with a high-frequency resonant energy tank for the dc-link inverter is proposed. As compared with the conventional PFC techniques, this approach is advantageous of lower switching losses, lower current stress, and higher control flexibility. The proposed PFC circuit is implemented on a series resonant inverter as an illustrative example. The experimental results are provided to validate the theoretical analyses. It is proven that the PFC circuit can achieve nearly unity power factor and very low harmonic distortion.

	An Improved Soft-Switching Phase-Shifted PWM Full-Bridge DC-DC Converter By Dudrík J., Dzurko P.	[View] [Download]
Abstract: A soft-switching full-bridge phase-shifted PWM converter using IGBT´s is proposed to improve the disadvantages of the previously presented converters. By adding active energy recovery snubber and auxiliary circuits zero-voltage and zero-current switching for all power switches is achieved for full load range. The principle of operation is explained and analysed. The simulation and experimental results are presented. The features and design considerations of the converter are verified on a 3 kW, 50 kHz IGBT based experimental circuit.

	Class C MOSFET Converter with Rectangular Gate Drive Waveform By Grzesik B., Stenzel T.	[View] [Download]
Abstract: The analysis of Class CKB converter, controlled with rectangular gate drive waveform, and aimed at its characterisation by D-control characteristics, i.e. characteristics such as function of duty ratio. The analysis is based on piecewise linear model and laboratory measurements.

	Full Bridge Zero Voltage Switched Phase Shifted DC-DC Converter with Enlarged Duty Cycle and ZVS Range By Beirante J.P., Borges B.V.*	[View] [Download]
Abstract: This paper presents the complete theoretical analysis, simulation and design optimisation of a Full-Bridge Zero-Voltage-Switched Phase-Shift (FB-ZVS-PS) DC-DC converter with an LCC auxiliary circuit, working with a frequency of 250kHz and with an output power of 1kW. The converter uses a voltage capacitor divider to create half of the input voltage in one terminal of the auxiliary inductor. The voltage at the inductor terminals will, therefore, oscillate between -VI/2 and +VI/2, producing an additional current reinforcing the primary current during the passive-to-active transition and increasing the energy available to achieve ZVS. This way, it is possible to design FB-PS-ZVS DC/DC converter without using a commutating inductor in series with the power transformer, avoiding the problems related with the effective duty cycle reduction. Furthermore, it is shown that, by properly design of LCC circuit, the ZVS range and the effective-duty-cycle can be optimised, without significant overall penalties.

	Modified Forward Type Soft-Switching Trasition PWM Power Converter with Reduced Conduction Losses By Gamage L., Morimoto T., Ando M., Abudulla M., Ishitobi M., Hamada S., Hiraki E., Nakaoka M.*	[View] [Download]
Abstract: A novel prototype of zero-voltage and zero-current soft-switching PWM DC-DC power converter with low voltage and current stresses is presented for telecommunication energy plant in this paper. A new interleaved two switch forward converter topology is proposed to minimize circulating current with no additional auxiliary snubber circuits. This power converter includes some remarkable advantages such as reduced components, improved efficiency, high power density and cost effective configuration for high power conditioning and processing applications. The basic principle of operation is illustrated on the basis of steady-state analysis. Moreover, the feasible effectiveness of the proposed power converter topology is verified and evaluated by 500W-100kHz breadboard form a practical point of view.

	New Concept of Vector-Modulated Quasi-Resonant DC Link Inverter By Chlebiš P.	[View] [Download]
Abstract: Soft switching of semiconductor switches enabled not only very low switching losses and higher power density but also good dv/dt of frequency inverters output voltage. The key idea is to reduce the device switching loses. In recent years presented topology of quasi resonant converters are very complicted and need complicted control methods. This paper presented a new concept of a quasi-resonant DC link converter topology for three phase AC drive with using vector modulation of output converter voltage.

	New Zero-Voltage-Transition PWM Converters with Zero Current Off Auxiliary Switches By Xu Y., Wang Z.	[View] [Download]
Abstract: A family of new isolated soft-switching topologies are introduced in the paper, and their principles are analyzed. Prototypes of a 100W forward converter and a 1kW half bridge converter are made, and several experiments have been carried out to prove the usability of these topologies. Efficiency of the prototype is measured.

	Saber Simulation and Modelling of a Boost Soft Switching HF Link DC-AC-AC for Brushless Motor Control By Gustin F., Bernot F., Berthon A.	[View] [Download]
Abstract: This paper presents simulation and experimental results of a double stage DC-AC-AC converter including a high frequency transformer link. It integrates soft switching techniques and is intended to be used for driving high voltage (400v) high power (18kW) synchronous brushless DC motor. Power switches used are IGBT transistors for the second stage and MOSFET for the first stage. The high frequency transformer allows low input voltage (for example 67v). For simulations, H.F transformer and synchronous motor models have been developed. The complete structure has been simulated using Saber software (Analogy Inc.), and tests with the transformer are presented.

	Three Phase Four Wire Shunt Active Filter for Power Factor Compensation for Asymmetric Networks By Èeròan P., Ráèek V., Cesnak L.*	[View] [Download]
Abstract: Measured results of an active filter are presented. The active filter controll algorithm is developed with a theory based on a new simple control algorithm of the three phase four wire shunt active filter. This control theory is excellent for power factor correction in the range from ones to tens of kVA.

	Three Phase Soft Commutation Inverter with High Frequency Transformer Assisted Resonant Snubbers By Inaba C.Y., Hiraki E., Ohgaki S., Nakaoka M.*	[View] [Download]
Abstract: In this paper, a high frequency transformer- assisted auxiliary active resonant commutation snubber (HFTA-ARCS) for voltage source power conversion circuits is proposed as compared with the conventional ARCS. A new three-phase voltage source soft switching inverter with HFTA-ARCS circuits in its three bridge legs has reduced current rating of auxiliary active switches and simplified control scheme without any boost current management required for soft switching. Its operation principle and control scheme are described and a design method of parameters on this HFTA-ARCS circuit is also discussed. Moreover, this soft switching inverter system with DSP-based digital control scheme is evaluated on the basis of computer simulation. The effectiveness of this inverter is proved by the simulation results.

	Transformer Parasitic Parameter - Assisted ZVS DC-DC Converter with Synchronous PWM Controlled Active ZCS Rectifier with Choke Input Smoothing Filter By Morimoto T., Saitoh K., Ogura K., Mamun A.Al, Moiseyev S., Nakamura M., Nakaoka M.	[View] [Download]
Abstract: This paper presents a new prototype of phase-shifted ZVS DC-DC converter with a high frequency transformer link which has two active power switches in rectifier with choke input type smoothing filter The wide ZVS area at primary side and ZCS area at secondary side can be achieved by using parasitic inductor component of high-frequency transformer. Its operation principle and feature are explained and compared with those of the previously-developed ZVS-PWM DC-DC converter. The steady-state operating characteristics of the proposed converter topology are illustrated and discussed on the basis of the simulation results and experimental ones. Finally, The ZVS DC-DC Converter with an active ZCS-PWM rectifier with capacitor input type smoothing filter is explained in this paper.

	Voltage-Clamped Soft Switching High Voltage Converter for Microwave Oven and Utility AC Side Harmonic Current Control Scheme By Matsushige T., Miyata E., Mamun A.Al, Rukonuzzaman M., Hiraki E., Nakaoka M., Bessyo D., Yasui K., Hirota I., Omori H.	[View] [Download]
Abstract: This paper presents a new topology of the voltage-clamped ZVS-PWM high-frequency inverter-fed DC-DC converter designed for microwave oven. This paper also presents to improve line current distortion and power factor in utility AC power side. Because the anode current of the magnetron must not exceed 1.2[A] because of the lifetime of magnetron, a new topology of the voltage-clamped ZVS-PWM high-frequency inverter-fed DC-DC converter with an active voltage clamped capacitor and the duty factor regulated PWM is implemented and evaluated under conditions of suppressed peak value of the magnetron anode current.