EPE Association: EPE 1989 - 32 - Dialogue Session 1.5: UPS, HEATING, FLUORESCENT LAMPS

EPE 1989 - 32 - Dialogue Session 1.5: UPS, HEATING, FLUORESCENT LAMPS
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1989 - Conference > EPE 1989 - 32 - Dialogue Session 1.5: UPS, HEATING, FLUORESCENT LAMPS

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   ANALYSIS AND DESIGN OF A SINUSSOlDAL POWER CONVERTER
By M. Emsermann [View]
[Download]

Abstract: In the course of miniaturization of power electronics higher switching frequencies in power converters are strived for. Thus resonant converters operating in ranges of hundreds of kilohertz are receiving increasing interest. Half-bridge-series-resonant and half-bridge-parallel-resonant converters are well kown in literature and subject of many investigations. Yet exact analysis does not give an easy understandable insight into the behavior of these power converters. In this paper the conversion technique of the parallel resonant converter operating above resonant frequency in the constant voltage mode will be explained. An approximate, but usefull steady state analysis based on classical ac-analysis will be introduced and design consideration for high frequency half bridge parallel resonant converters in the constant voltage mode will be given. Hence an easy to use design tool is developed. With the results gathered from the analysis a power converter is designed and experimental results will prove the vality of the analysis.

   HIGH FREQUENCY POWER CONVERTERS FOR FLUORESCENT LAMPS
By G. Gambirasio; W. Kaiser; L. Matakas Jr. [View]
[Download]

Abstract: Fluorescent lamps supplied at high frequency by electronic converters represent a breakthrough in modern high efficiency lighting design. This paper presents results obtained with experimental electronic converters developed in Brazil: it also shows the advantages obtained by using a single three-phase rectifier to supply D.C. current to many individual inverters in large lighting installations. This solution allows both a significant investment reduction and an increase in global efficiency, and should increase the competitiveness of electronic converters against conventional ballasts in large lighting installations.

   INSTANTANEOUS VOLTAGE CONTROL-BASED SINUSOIDAL CVCF INVERTER WITH HIGH-FREQUENCY RESONANT AC LINK AND lTS UPS SYSTEM APPLICATION
By H. Yonemori; Y. Nishida; M. Nakaoka; F. Harashima [View]
[Download]

Abstract: This paper is mainly concerned with a new conceptional multistage topology of sinewave modulated DC-LFAC power conversion conditioning and processing system, which incorporates a phase-shifting PWM series resonant inverter coupled cycloconverter cascade circuit (cycloconverter) with a high-frequency AC (HFAC) transformer link. Its advanced hardware of systems control implementation is originally presented that treats with an instantaneous sinewave-modulated voltage regulation and compensation strategies, depending upon load disturbance and input DC voltage fluctuations in addition to instantaneous power regenerating regulation scheme. The newly-proposed feasible breadboard using MOS-gate power transistor modules is demonstrated and experimentally tested for high-power density AC mini-uninterruptible power supply. This series resonant cycloinverter with HFAC link which includes the control function of a bidirectional power flow is evaluated as a new AC power supply systems for telecommunication and space-station / aerospace energy utilizations in next generation.

   A NEW PHASE-SHIFTING PWM REGULATED-MODE RESONANT INVERTER USING STATIC INDUCTION POWER DEVICES FOR INDUCTION-HEATING AND -MELTING APPLICATIONS
By S. Nagai; A Chibani; M. Nakaoka; H. Ogiwara [View]
[Download]

Abstract: This paper describes a phase-shifted pulse-width modulation and frequency modulation hybrid type control-based series-resonant bridge inverter system using the latest Static Induction (SI) Transistors or Static Induction (SI) Thyristors, which is put into practice for 20 kHz - 400 kHz induction-heatlng and -melting high-power supply systems in industrial fields. The new conceptional adaptive frequency tracking-based phase-shifted PWM regulation scheme which is incorporated into a voltage-fed bridge type series resonant inverter system is newly proposed in order to minimize switching losses, switching stresses and to reduce EMI and acoustic noise. The trially-produced breadboard using Static Induction Transistors is successfully demonstrated and discussed from a practical point of view.

   A NEW SEQUENTIAL-SWITCHING VOLTAGE-CLAMPED HIGH-FREQUENCY RESONANT INVERTER WITH INDUCTIVE ENERGY REGENERATING AND PROCESSING LOOPS FOR INDUCTION-HEATING AND...
By L. Ding; M. Nakaoka; S. Hamada; Y. Ogino; H. Ogiwara [View]
[Download]

Abstract: This paper presents the state-of-the-art power electronic developments in a new phase-shift controlled sequential switching-mode voltage-clamped resonant inverter circuit with reactor-storage energy regeneration feedback loops and a constant frequency phase-shifted voltage regulation scheme. The sequential switching voltage-clamped resonant inverter with phase-shift control operates stably and efficiently on the basis of introducing the reverse-blocking thyristors (GATTs), asymetrical thyristors (A-SCR) in series with diode, GTO thyristors, and Static Induction (SI) thyristors for high-frequency switching control. This newly developed sequential resonant inverter with state-variable clamping function can generate stably a large amount of high-frequency AC power in the ultrasonic-frequency ranges from 10kHz up to about 100kHz depending upon the new power semiconductor devices employed, with an improvement in performances and high-power density. The control system implementation of this inverter is demonstrated for induction-heating and-melting applications in industrial and medical systems. The circuit analysis in steady-state is developed and the performance evaluations associated with the phase-shift control voltage regulation characteristics at a fixed frequency and frequency regulation control characteristics are illustrated in terms of the normalized and parameters. The 100kHz-50kW power conversion breadboard and control system hardware, which are put into the practice, are experimentally introduced using high-frequency GATTs which is trially produced for high-performance induction-heating and melting power supply as well as high-intensity ultrasonic generator.

   DIGITALLY CONTROLLED RESONANT CONVERTER FOR X-RAY GENERATOR UTILIZING PARASITIC CIRCUIT CONSTANTS OF HIGH VOLTAGE-TRANSFORMER AND -CABLES
By H. Hino; T. Hatakeyama; M. Nakaoka [View]
[Download]

Abstract: This paper describes a resonant PWM inverter linked DC-DC converter which uses the high-voltage transformer leakage inductance as resonant components with additional capacitor, and the high voltage cable-input capacitance as smoothing filter. This converter output regulation is digitally controlled using DSP (Digital Signal Processor) for obtaining a fast rising time and adjust output voltage within a wide load range. The converter is very applicable to the X-ray generator because control parameters are easy to adjust objectively using software for its wide load range.

   DESIGN PARAMETERS FOR HIGH FREQUENCY SERIES RESONANCE ENERGY CONVERTERS USED AS FLUORESCENT LAMP ELECTRONIC BALLAST
By M. I. Mahmoud; R. Perret [View]
[Download]

Abstract: The high frequency operation of a fluorescent lamp has been practically investigated using an externally driven high frequency series resonance converter. The converter structure is studied to choose the most economical power electronic circuit. A mathematical model and computer program were developed to simulate the electronic ballast operation to define the best zone of operation. The design parameters of the resonance circuit components have been deduced in order to get the optimal operating condition for both ignition during the starting phase and current limiting during normal operation phase. Experimental results have been obtained to compare the 50 Hz operation of the fluorescent lamp and conventional ballast with the electronic ballast at high frequency operation (30 kHz). The gain in the power consumption of the fluorescent lamp at high frequency operation and the power consumption of the electronic ballast has been experimentally illustrated.

   DESIGN OF A SWITCHED MODE RECTIFIER / BATTERY CHARGER FOR UPS
By C. D. Manning [View]
[Download]

Abstract: This paper discusses the design of a switched mode rectifier / battery charger which utilises a power MOSFET buck converter topology operating directly from the unsmoothed rectified single phase mains supply, and which provides a voltage and current regulated DC output. The converter was designed to supply the average power required by a UPS inverter while charging the battery. The circuit is simple and efficient and the lack of a large smoothing capacitor at the input enables a high power factor to be obtained. Various design aspects are discussed, including the design of the power circuit, the current mode PWM and the voltage and current servo control loops.

EPE 1989 - 32 - Dialogue Session 1.5: UPS, HEATING, FLUORESCENT LAMPS
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1989 - Conference > EPE 1989 - 32 - Dialogue Session 1.5: UPS, HEATING, FLUORESCENT LAMPS
	[return to parent folder]

	ANALYSIS AND DESIGN OF A SINUSSOlDAL POWER CONVERTER By M. Emsermann	[View] [Download]
Abstract: In the course of miniaturization of power electronics higher switching frequencies in power converters are strived for. Thus resonant converters operating in ranges of hundreds of kilohertz are receiving increasing interest. Half-bridge-series-resonant and half-bridge-parallel-resonant converters are well kown in literature and subject of many investigations. Yet exact analysis does not give an easy understandable insight into the behavior of these power converters. In this paper the conversion technique of the parallel resonant converter operating above resonant frequency in the constant voltage mode will be explained. An approximate, but usefull steady state analysis based on classical ac-analysis will be introduced and design consideration for high frequency half bridge parallel resonant converters in the constant voltage mode will be given. Hence an easy to use design tool is developed. With the results gathered from the analysis a power converter is designed and experimental results will prove the vality of the analysis.

	HIGH FREQUENCY POWER CONVERTERS FOR FLUORESCENT LAMPS By G. Gambirasio; W. Kaiser; L. Matakas Jr.	[View] [Download]
Abstract: Fluorescent lamps supplied at high frequency by electronic converters represent a breakthrough in modern high efficiency lighting design. This paper presents results obtained with experimental electronic converters developed in Brazil: it also shows the advantages obtained by using a single three-phase rectifier to supply D.C. current to many individual inverters in large lighting installations. This solution allows both a significant investment reduction and an increase in global efficiency, and should increase the competitiveness of electronic converters against conventional ballasts in large lighting installations.

	INSTANTANEOUS VOLTAGE CONTROL-BASED SINUSOIDAL CVCF INVERTER WITH HIGH-FREQUENCY RESONANT AC LINK AND lTS UPS SYSTEM APPLICATION By H. Yonemori; Y. Nishida; M. Nakaoka; F. Harashima	[View] [Download]
Abstract: This paper is mainly concerned with a new conceptional multistage topology of sinewave modulated DC-LFAC power conversion conditioning and processing system, which incorporates a phase-shifting PWM series resonant inverter coupled cycloconverter cascade circuit (cycloconverter) with a high-frequency AC (HFAC) transformer link. Its advanced hardware of systems control implementation is originally presented that treats with an instantaneous sinewave-modulated voltage regulation and compensation strategies, depending upon load disturbance and input DC voltage fluctuations in addition to instantaneous power regenerating regulation scheme. The newly-proposed feasible breadboard using MOS-gate power transistor modules is demonstrated and experimentally tested for high-power density AC mini-uninterruptible power supply. This series resonant cycloinverter with HFAC link which includes the control function of a bidirectional power flow is evaluated as a new AC power supply systems for telecommunication and space-station / aerospace energy utilizations in next generation.

	A NEW PHASE-SHIFTING PWM REGULATED-MODE RESONANT INVERTER USING STATIC INDUCTION POWER DEVICES FOR INDUCTION-HEATING AND -MELTING APPLICATIONS By S. Nagai; A Chibani; M. Nakaoka; H. Ogiwara	[View] [Download]
Abstract: This paper describes a phase-shifted pulse-width modulation and frequency modulation hybrid type control-based series-resonant bridge inverter system using the latest Static Induction (SI) Transistors or Static Induction (SI) Thyristors, which is put into practice for 20 kHz - 400 kHz induction-heatlng and -melting high-power supply systems in industrial fields. The new conceptional adaptive frequency tracking-based phase-shifted PWM regulation scheme which is incorporated into a voltage-fed bridge type series resonant inverter system is newly proposed in order to minimize switching losses, switching stresses and to reduce EMI and acoustic noise. The trially-produced breadboard using Static Induction Transistors is successfully demonstrated and discussed from a practical point of view.

	A NEW SEQUENTIAL-SWITCHING VOLTAGE-CLAMPED HIGH-FREQUENCY RESONANT INVERTER WITH INDUCTIVE ENERGY REGENERATING AND PROCESSING LOOPS FOR INDUCTION-HEATING AND... By L. Ding; M. Nakaoka; S. Hamada; Y. Ogino; H. Ogiwara	[View] [Download]
Abstract: This paper presents the state-of-the-art power electronic developments in a new phase-shift controlled sequential switching-mode voltage-clamped resonant inverter circuit with reactor-storage energy regeneration feedback loops and a constant frequency phase-shifted voltage regulation scheme. The sequential switching voltage-clamped resonant inverter with phase-shift control operates stably and efficiently on the basis of introducing the reverse-blocking thyristors (GATTs), asymetrical thyristors (A-SCR) in series with diode, GTO thyristors, and Static Induction (SI) thyristors for high-frequency switching control. This newly developed sequential resonant inverter with state-variable clamping function can generate stably a large amount of high-frequency AC power in the ultrasonic-frequency ranges from 10kHz up to about 100kHz depending upon the new power semiconductor devices employed, with an improvement in performances and high-power density. The control system implementation of this inverter is demonstrated for induction-heating and-melting applications in industrial and medical systems. The circuit analysis in steady-state is developed and the performance evaluations associated with the phase-shift control voltage regulation characteristics at a fixed frequency and frequency regulation control characteristics are illustrated in terms of the normalized and parameters. The 100kHz-50kW power conversion breadboard and control system hardware, which are put into the practice, are experimentally introduced using high-frequency GATTs which is trially produced for high-performance induction-heating and melting power supply as well as high-intensity ultrasonic generator.

	DIGITALLY CONTROLLED RESONANT CONVERTER FOR X-RAY GENERATOR UTILIZING PARASITIC CIRCUIT CONSTANTS OF HIGH VOLTAGE-TRANSFORMER AND -CABLES By H. Hino; T. Hatakeyama; M. Nakaoka	[View] [Download]
Abstract: This paper describes a resonant PWM inverter linked DC-DC converter which uses the high-voltage transformer leakage inductance as resonant components with additional capacitor, and the high voltage cable-input capacitance as smoothing filter. This converter output regulation is digitally controlled using DSP (Digital Signal Processor) for obtaining a fast rising time and adjust output voltage within a wide load range. The converter is very applicable to the X-ray generator because control parameters are easy to adjust objectively using software for its wide load range.

	DESIGN PARAMETERS FOR HIGH FREQUENCY SERIES RESONANCE ENERGY CONVERTERS USED AS FLUORESCENT LAMP ELECTRONIC BALLAST By M. I. Mahmoud; R. Perret	[View] [Download]
Abstract: The high frequency operation of a fluorescent lamp has been practically investigated using an externally driven high frequency series resonance converter. The converter structure is studied to choose the most economical power electronic circuit. A mathematical model and computer program were developed to simulate the electronic ballast operation to define the best zone of operation. The design parameters of the resonance circuit components have been deduced in order to get the optimal operating condition for both ignition during the starting phase and current limiting during normal operation phase. Experimental results have been obtained to compare the 50 Hz operation of the fluorescent lamp and conventional ballast with the electronic ballast at high frequency operation (30 kHz). The gain in the power consumption of the fluorescent lamp at high frequency operation and the power consumption of the electronic ballast has been experimentally illustrated.

	DESIGN OF A SWITCHED MODE RECTIFIER / BATTERY CHARGER FOR UPS By C. D. Manning	[View] [Download]
Abstract: This paper discusses the design of a switched mode rectifier / battery charger which utilises a power MOSFET buck converter topology operating directly from the unsmoothed rectified single phase mains supply, and which provides a voltage and current regulated DC output. The converter was designed to supply the average power required by a UPS inverter while charging the battery. The circuit is simple and efficient and the lack of a large smoothing capacitor at the input enables a high power factor to be obtained. Various design aspects are discussed, including the design of the power circuit, the current mode PWM and the voltage and current servo control loops.