EPE Association: EPE 1987 - 08 - Lecture Session 1.08: HIGH FREQUENCY CONVERTERS

EPE 1987 - 08 - Lecture Session 1.08: HIGH FREQUENCY CONVERTERS
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1987 - Conference > EPE 1987 - 08 - Lecture Session 1.08: HIGH FREQUENCY CONVERTERS

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   RESONANT CURRENT PHASOR CONTROL-BASED HIGH-FREQUENCY INVERTER USING STATIC INDUCTION POWER DEVICES
By H. Ogiwara; M. Nakaoka; T. Maruhashi [View]
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Abstract: The authors introduce a new circuit configuration of resonant-type high-frequency inverter having inherent fast response of the output power regulation and variable-voltage variable-frequency (VVVF) capability. The power conditioning circuit is composed of a parallel combination of two series-resonant sub-inverters with common DC input and output AC terminals. Both resonant inverter units are operated at synchronous resonant frequency but with an adjustable phase difference angle from 0° to 180° allowing continuous control of the output AC power from full to null power, respectively. Steady-state operation of this inverter is analized theoretically and computer-simulated waveforms and its characteristic curves are shown in terms of normalized control variables and circuit parameters. A newly-developed prototype inverter using Static lnduction Power Devices (SIT or SITh) is originally tested with a high-frequency induction-heating load with parallel tuned tank circuit to demonstrate experimentally the proposed instantaneous current- phasor controlled inverter principle and the steady-state inverter performances.

   CIRCUIT TOPOLOGIES OF SELF-CONTROLLED SINGLE-ENDED HIGH FREQUENCY RESONANT INVERTERS
By Hideki Omori; Toshiaki Iwai; Mutsuo Nakaoka; Toru Maruhashi [View]
[Download]

Abstract: This paper refers to a group of self-controlled single-ended high-frequency resonant inverters which are less in switching loss and simplified in circuit construction. They are devided into regenerative and non-regenerative types with respect to their operations and types of switching devices, and are further classified into voltage-fed and current-fed types. And discussed in this paper are the operating characteristics and the control method for these inverters. Furthermore, the duality of voltage-fed and current-fed types are clarified. Next, referred to is the application of regenerative and nonregenerative inverters to induction heating ranges, and the control system including self-controlled loops as well.

   NEW HIGH-FREQUENCY RESONANT PWM INVERTER-LINKED DC-DC CONVERTER USING INSULATED GATE TRANSISTORS
By A. Chibani; M. Nakaoka; T. Maruhashi [View]
[Download]

Abstract: This paper is concerned with a novel type of voltage fed high-frequency PWM resonant inverter and converter. The continuous operation mode of the voltage-fed inverter having a DC power processing output circuitry is described. The proposed PWM inverter-linked DC-DC converter using IGTs operates efficiently in the frequency ranges of 20 kHz to 50 kHz or more. The resonant PWM operation mode of the inverter and converter using the control technique based on the phase-shifting modulation between the switching pairs is discussed from a theoretical and practical point of views. The operating performance of the proposed converter and its peripheral hardware applications of IGTs are mainly discussed and evaluated.

   HIGH VOLTAGE, VERY FAST SWITCHES DESIGN
By J. Redoutey; Y. Servet [View]
[Download]

Abstract: Designing a high voltage, very fast switch for chopping the 380 V mains at frequency in excess of 20 KHz and current in order of 50 A is not very easy. The well known circuits and components currently used in industrial applications can be no longer used at these frequencies. New circuits must be developped including the latest improvements. In the first part of this paper, a review of the specific behavior of high voltage bipolar transistors and Darlingtons is done. Particular problems like dynamic saturation, RBSOA and current derating are discussed. Solutions and examples of circuits are given. The second part of the paper is dedicated to the improvements of classical solutions using open emitter control. Problems encountered with open emitter controlled high voltage Darlingtons are discussed. Cautions for use and examples of circuits are also given.

   The Switching Behaviour of a New Very Fast Bipolar Power Transistor
By L. Lorenz; K. Reinmuth; G. Schulze [View]
[Download]

Abstract: This paper deals with a detailed analysis of the dynamic and static behaviour of a half bridge SIRET module. Due to the fine emitter structure, the short emitter lengths and the optimum arrangement of base contacts with small base widths, the SIRET is characterized by short switching and storage times and extended SOA region. Hence, high clock frequencies can be achieved with this module without any extra transistor circuitry. The turn-on methods and the conditions for a safe turn-off, free of interference are discussed, together with the short circuit capability.

EPE 1987 - 08 - Lecture Session 1.08: HIGH FREQUENCY CONVERTERS
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 1987 - Conference > EPE 1987 - 08 - Lecture Session 1.08: HIGH FREQUENCY CONVERTERS
	[return to parent folder]

	RESONANT CURRENT PHASOR CONTROL-BASED HIGH-FREQUENCY INVERTER USING STATIC INDUCTION POWER DEVICES By H. Ogiwara; M. Nakaoka; T. Maruhashi	[View] [Download]
Abstract: The authors introduce a new circuit configuration of resonant-type high-frequency inverter having inherent fast response of the output power regulation and variable-voltage variable-frequency (VVVF) capability. The power conditioning circuit is composed of a parallel combination of two series-resonant sub-inverters with common DC input and output AC terminals. Both resonant inverter units are operated at synchronous resonant frequency but with an adjustable phase difference angle from 0° to 180° allowing continuous control of the output AC power from full to null power, respectively. Steady-state operation of this inverter is analized theoretically and computer-simulated waveforms and its characteristic curves are shown in terms of normalized control variables and circuit parameters. A newly-developed prototype inverter using Static lnduction Power Devices (SIT or SITh) is originally tested with a high-frequency induction-heating load with parallel tuned tank circuit to demonstrate experimentally the proposed instantaneous current- phasor controlled inverter principle and the steady-state inverter performances.

	CIRCUIT TOPOLOGIES OF SELF-CONTROLLED SINGLE-ENDED HIGH FREQUENCY RESONANT INVERTERS By Hideki Omori; Toshiaki Iwai; Mutsuo Nakaoka; Toru Maruhashi	[View] [Download]
Abstract: This paper refers to a group of self-controlled single-ended high-frequency resonant inverters which are less in switching loss and simplified in circuit construction. They are devided into regenerative and non-regenerative types with respect to their operations and types of switching devices, and are further classified into voltage-fed and current-fed types. And discussed in this paper are the operating characteristics and the control method for these inverters. Furthermore, the duality of voltage-fed and current-fed types are clarified. Next, referred to is the application of regenerative and nonregenerative inverters to induction heating ranges, and the control system including self-controlled loops as well.

	NEW HIGH-FREQUENCY RESONANT PWM INVERTER-LINKED DC-DC CONVERTER USING INSULATED GATE TRANSISTORS By A. Chibani; M. Nakaoka; T. Maruhashi	[View] [Download]
Abstract: This paper is concerned with a novel type of voltage fed high-frequency PWM resonant inverter and converter. The continuous operation mode of the voltage-fed inverter having a DC power processing output circuitry is described. The proposed PWM inverter-linked DC-DC converter using IGTs operates efficiently in the frequency ranges of 20 kHz to 50 kHz or more. The resonant PWM operation mode of the inverter and converter using the control technique based on the phase-shifting modulation between the switching pairs is discussed from a theoretical and practical point of views. The operating performance of the proposed converter and its peripheral hardware applications of IGTs are mainly discussed and evaluated.

	HIGH VOLTAGE, VERY FAST SWITCHES DESIGN By J. Redoutey; Y. Servet	[View] [Download]
Abstract: Designing a high voltage, very fast switch for chopping the 380 V mains at frequency in excess of 20 KHz and current in order of 50 A is not very easy. The well known circuits and components currently used in industrial applications can be no longer used at these frequencies. New circuits must be developped including the latest improvements. In the first part of this paper, a review of the specific behavior of high voltage bipolar transistors and Darlingtons is done. Particular problems like dynamic saturation, RBSOA and current derating are discussed. Solutions and examples of circuits are given. The second part of the paper is dedicated to the improvements of classical solutions using open emitter control. Problems encountered with open emitter controlled high voltage Darlingtons are discussed. Cautions for use and examples of circuits are also given.

	The Switching Behaviour of a New Very Fast Bipolar Power Transistor By L. Lorenz; K. Reinmuth; G. Schulze	[View] [Download]
Abstract: This paper deals with a detailed analysis of the dynamic and static behaviour of a half bridge SIRET module. Due to the fine emitter structure, the short emitter lengths and the optimum arrangement of base contacts with small base widths, the SIRET is characterized by short switching and storage times and extended SOA region. Hence, high clock frequencies can be achieved with this module without any extra transistor circuitry. The turn-on methods and the conditions for a safe turn-off, free of interference are discussed, together with the short circuit capability.