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High-Frequency Soft-Switching PWM DC-DC Power Converter for Low Voltage Large Current Applications
Hidekazu Muraoka,Kenya Sakamoto,Mutsuo Nakaoka 전력전자학회 2001 ICPE(ISPE)논문집 Vol.2001 No.10
This paper presents a novel prototype version of ZCS-PWM forward DC-DC power converter using power MOSFETs which is designed for application specific low voltage large current conversion operation The soft-switching forward power converter with a high frequency isolated transformer link which can efficiency operate over wide load ranges under two conditions of ZCS as well as active voltage clamped switching is evaluated and discussed on the basis of the simulation and experimental results.<br/>
PWM-PDM Controlled Soft-Switching DC-DC Power Converter Operating at Battery Input
Hidekazu Muraoka,Mutsuo Nakaoka,Kenya Sakamoto 전력전자학회 2004 ICPE(ISPE)논문집 Vol.- No.-
This paper presents a innovative prototype of PWM soft-switching DC-DC forward type converter designed for specific low voltage large current condition at 24V battery input. To achieve soft-switching, prototype of ZCS PWM DC-DC forward type converter applies additional control mode at partial operating area. The proposed converter is controlled by dual modulation as PWM-PDM at low duty operation. The soft-switching forward converter controlled PWM-PDM dual control scheme which can efficiency operate over wide load ranges under conditions of ZCS and active voltage clamped<br/> switching is established.
Kentaro Fujita,Hidekazu Muraoka,Tarek Ahmed,Eiji Hiraki,Mutsuo Nakaoka,Hyun Woo Lee,Kazunori Nishimura 전력전자학회 2004 ICPE(ISPE)논문집 Vol.- No.-
This paper presents two types of high frequency resonant inverters using power MOSFETs for driving the next generation rare gas fluorescent lamp based on the dielectric barrier discharge phenomenon for liquid crystal backlight in personal computer and car navigation equipment, which has no harmful influence for environment and human body. The high frequency resonant inverters, which include the royer type parallel resonant class D high frequency inverter using two power switches and class E edge resonant high frequency inverter using a single power switch, one is generally used as a light source driver and the other is newly introduced for the purpose of high efficiency and low cost in total system. The experimental performances are comparatively evaluated from the viewpoints of performance evaluations in these resonant<br/> inverters, are discussed as compared with the royer type and class E type high frequency resonant inverters. Moreover, this paper discusses wide and linear control characteristics on the basis of Pulse Density Modulation (PDM) control scheme for voltage source class E edge-resonant inverter.
Hisayuki Sugimura,Hidekazu Muraoka,Izuo Hirota,Toshiaki Iwai,Hideki Omori,Hyun-Woo Lee,Mutsuo Nakaoka 전력전자학회 2004 ICPE(ISPE)논문집 Vol.- No.-
In this paper, a novel topology of soft switching PWM high frequency AC power conversion conditioning and processing circuit without DC smoothing Capacitor filter link from the voltage grid of commercial utility frequency AC power supply source with 60Hz-100V or 60Hz-200V is proposed and introduced for next generation consumer induction heating (IH) boiler applications as a hot water<br/> producer, steamer and super heated steamer. The operating principle of commercial utility frequency AC (LFAC) to high frequency AC (HFAC) power frequency conversion soft switching circuit defined as high frequency soft switching cycloinverter is described, which can efficiently operate under a principle of zero voltage soft switching and regulate by means of positive and negative alternate asymmetrical PWM synchronized with the commercial utility frequency single phase AC voltage. The dual mode control scheme based on<br/> high frequency PWM and commercial frequency AC voltage PDM for high frequency cycloinverter are discussed in order to extend its soft switching commutation operating range in spite of power regulation ranging from low power to high power setting. This power frequency changer as high frequency cycloinverter is developed originally for the high frequency induction heating boiler in promising consumer<br/> and industrial fluid pipeline systems.<br/> It is verified on the basis of experiment and simulation results of the soft switching high frequency cycloinverter using IGBTs which is more suitable for the business-use IH boiler using new electromagnetic induction heating dual packs fluid heater. Finally, the power regulation characteristics in addition to utility AC side line current harmonic components and power factor characteristics and power conversion efficiency characteristics of this high frequency cycloinverter treated here are evaluated and discussed from an experimental point of view.
Hisayuki Sugimura,Hidekazu Muraoka,Tarek Ahmed,Srawouth Chandhaket,Eiji Hiraki,Mutsuo Nakaoka,Hyun-Woo Lee 전력전자학회 2004 JOURNAL OF POWER ELECTRONICS Vol.4 No.3
In this paper, a constant frequency phase shifting PWM-controlled voltage source full bridge-type series load resonant high-frequency inverter using the 4 11 generation [GBT power modules is presented for innovative consumer electromagnetic induction heating applications, such as a hot water producer. steamer and super heated steamer. The bridge arm side link passive capacitive snubbers in parallel with each power semiconductor device and AC load side linked active edge inductivc snubber-assisted series load resonant tank soft switching inverter with a constant frequency phase shifted PWM control scheme is evaluated and discussed on the basis of the simulation and experimental results. It is proved from a practical point of view that the series load resonant and edge resonant hybrid high-frequency inverter topology. what is called, DE class type, including the variable-power variable-frequency regulation function can expand zero voltage soft switching commutation area even under low output power setting ranges, which is more suitable and acceptable for newly developed induction heated dual pack fluid heaters. Furthermore. even the lower output power regulation mode of this high-frequency load resonant tank inverter circuit is verified so that this inverter can achieve ZVS with the aid of the single auxiliary inductor snubber.
Kenya Sakamoto,Masakazu Kanaoka,Hidekazu Muraoka,Ryuhei Hojyo,Mutsuo Nakaoka 전력전자학회 1998 ICPE(ISPE)논문집 Vol.- No.-
This paper presents a novel prototype of active voltage clamped quasi-resonant ZVS-PWM forward DC-DC converter designed for specific low voltage high current application. We establish the soft-switching forward converter with a high frequency isolated link which can efficient operate over wide load ranges under conditions of zero voltage soft-switching and active voltage clamped switching. In addition, we evaluate connection of the soft-switching forward converter with large capacitor which capacitance is over 100[F].<br/>
Development of Induction Heatcd Hot Water Producer using Sort Switching PWM High Frequency Inverter
Kentrou Fujita,Serguel Moisseev,Laknath Gamage,Sarawouth Chandhaket,HideKazu Muraoka,Mutsuo Nakaoka 전력전자학회 2003 전력전자학술대회 논문집 Vol.2003 No.7(2)
This paper presents a new conceptual electromagnetic induction eddy current-based stainless steel plate spiral type heater for heat exchanger or Dual Packs Heater in hot water producer, boiler steamer and super heated steamer, which is more suitable and acceptable for new generation consumer power applications In addition. an active clamped edge-resonant PWM high frequency inverter using trench gate IGBTs power module, can operate under a principle of zero voltage soft commutation with PWM is developed and demonstrated for a high efficient induction heated hot water producer and boiler in the consumer power applications This consumer induction heater power appliance using active clamp soft switching PWM high-frequency Inverter is evaluated and discussed on the basis of the simulation and experimental resulis<br/>