EPE Association: EPE 2009 - Subtopic 19-1 - LS: 'Industry Specific Energy Conversion and Conditioning Technologies'

EPE 2009 - Subtopic 19-1 - LS: 'Industry Specific Energy Conversion and Conditioning Technologies'
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 19: 'Industry Specific Energy Conversion and Conditioning Technologies' > EPE 2009 - Subtopic 19-1 - LS: 'Industry Specific Energy Conversion and Conditioning Technologies'

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   Closed-loop Regulated Power Supply for Ozone Generation based on Buck Converter and Current-Fed Push-pull Resonant Inverter
By Jose Marcos ALONSO, Carlos ORDIZ, DAVID GACIO, JAVIER RIBAS, ANTONIO CALLEJA [View]
[Download]

Abstract: In this paper the design, implementation and experimental results of a high-voltage power supply for ozone generation are presented. The power stage is formed by a buck converter plus a current-fed parallel-resonant push-pull inverter. The buck converter is used to both regulate the output power against the line voltage variation, and to control the power delivered to the ozone generator (OG). The push-pull inverter assures safe operation of the OG by working at the parallel resonant frequency given by the high-voltage transformer plus OG characteristic. In this paper, the closed-loop operation of the proposed converter is analyzed and implemented as a method to compensate variations in the line voltage and in the OG. A low cost commercial UC3872 integrated circuit is used to control both the push-pull inverter and the buck converter, providing OG power control and regulation via buck converter duty cycle. Protections against short circuit and no load operation are also implemented. Experimental results for a 100W prototype are shown and discussed.

   Influence of Small-Series LC circuit on the Input Current-Ripple for Pulse-link DC-AC Converter for Fuel Cells Applications
By Kentaro FUKUSHIMA, Isami NORIGOE, Masahito SHOYAMA, Tamotsu NINOMIYA, Yosuke HARADA, Kenta TSUKAKOSHI [View]
[Download]

Abstract: This paper considers the influence of small-series LC circuit on the input current-ripple which is inserted to Pulse-link DC-AC converter for fuel cells applications. Fuel cells have drawback about current-ripple because the chemical reaction time is much slower than commercial frequency. Therefore, in these applications, the input current-ripple reduction is essential factor in the DC-AC converter. Input current-ripple from fuel cells gives damage the fuel consumption and life time. The proposed pulse-link DC-AC converter has the advantage that small series LC circuit values achieve to reduce input current-ripple. Previous method which is shown before has drawback that inductance becomes large. The proposed method at this time uses only small inductance and capacitance value, so it can reduce the size of the unit. In this paper, it is analyzed the static characteristics of pulse-link DC-AC converter for fuel cells, and considers the input current-ripple reduction method used by small-series LC circuit.

   Limitation of inductive power transfer for consumer applications
By Eberhard WAFFENSCHMIDT, Toine STARING [View]
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Abstract: Inductive power transmission is proposed more and more also for consumer applications. In this work, limitations with respect to efficiency of the whole magnetic system are investigated. The power efficiency of a given structure is dependent on resonant matching and on the load impedance. First, the matching conditions for optimal power efficiency are derived. Then the achievable efficiency for inductive transmission structures with varying distance and size ratios are investigated. Recent publications on inductive power transmission are evaluated and discussed based on these results. As a conclusion, inductive power transmission in a larger space (e.g. a whole room) is very inefficient. On the other hand, inductive power transmission at a surface can be efficient as conventional power supplies. Based on this insight, an inductive power transmission pad has been designed and built, with the purpose to charge mobile devices like mobile phones. It can charge an arbitrary number of devices and allows free positioning of the devices on the pad. It consists of an array of planar transmitter coils and has a size of 20 cm x 26 cm. It can detect the position of a receiver and activates only the coils underneath a receiver.

EPE 2009 - Subtopic 19-1 - LS: 'Industry Specific Energy Conversion and Conditioning Technologies'
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 19: 'Industry Specific Energy Conversion and Conditioning Technologies' > EPE 2009 - Subtopic 19-1 - LS: 'Industry Specific Energy Conversion and Conditioning Technologies'
	[return to parent folder]

	Closed-loop Regulated Power Supply for Ozone Generation based on Buck Converter and Current-Fed Push-pull Resonant Inverter By Jose Marcos ALONSO, Carlos ORDIZ, DAVID GACIO, JAVIER RIBAS, ANTONIO CALLEJA	[View] [Download]
Abstract: In this paper the design, implementation and experimental results of a high-voltage power supply for ozone generation are presented. The power stage is formed by a buck converter plus a current-fed parallel-resonant push-pull inverter. The buck converter is used to both regulate the output power against the line voltage variation, and to control the power delivered to the ozone generator (OG). The push-pull inverter assures safe operation of the OG by working at the parallel resonant frequency given by the high-voltage transformer plus OG characteristic. In this paper, the closed-loop operation of the proposed converter is analyzed and implemented as a method to compensate variations in the line voltage and in the OG. A low cost commercial UC3872 integrated circuit is used to control both the push-pull inverter and the buck converter, providing OG power control and regulation via buck converter duty cycle. Protections against short circuit and no load operation are also implemented. Experimental results for a 100W prototype are shown and discussed.

	Influence of Small-Series LC circuit on the Input Current-Ripple for Pulse-link DC-AC Converter for Fuel Cells Applications By Kentaro FUKUSHIMA, Isami NORIGOE, Masahito SHOYAMA, Tamotsu NINOMIYA, Yosuke HARADA, Kenta TSUKAKOSHI	[View] [Download]
Abstract: This paper considers the influence of small-series LC circuit on the input current-ripple which is inserted to Pulse-link DC-AC converter for fuel cells applications. Fuel cells have drawback about current-ripple because the chemical reaction time is much slower than commercial frequency. Therefore, in these applications, the input current-ripple reduction is essential factor in the DC-AC converter. Input current-ripple from fuel cells gives damage the fuel consumption and life time. The proposed pulse-link DC-AC converter has the advantage that small series LC circuit values achieve to reduce input current-ripple. Previous method which is shown before has drawback that inductance becomes large. The proposed method at this time uses only small inductance and capacitance value, so it can reduce the size of the unit. In this paper, it is analyzed the static characteristics of pulse-link DC-AC converter for fuel cells, and considers the input current-ripple reduction method used by small-series LC circuit.

	Limitation of inductive power transfer for consumer applications By Eberhard WAFFENSCHMIDT, Toine STARING	[View] [Download]
Abstract: Inductive power transmission is proposed more and more also for consumer applications. In this work, limitations with respect to efficiency of the whole magnetic system are investigated. The power efficiency of a given structure is dependent on resonant matching and on the load impedance. First, the matching conditions for optimal power efficiency are derived. Then the achievable efficiency for inductive transmission structures with varying distance and size ratios are investigated. Recent publications on inductive power transmission are evaluated and discussed based on these results. As a conclusion, inductive power transmission in a larger space (e.g. a whole room) is very inefficient. On the other hand, inductive power transmission at a surface can be efficient as conventional power supplies. Based on this insight, an inductive power transmission pad has been designed and built, with the purpose to charge mobile devices like mobile phones. It can charge an arbitrary number of devices and allows free positioning of the devices on the pad. It consists of an array of planar transmitter coils and has a size of 20 cm x 26 cm. It can detect the position of a receiver and activates only the coils underneath a receiver.