EPE Association: EPE 2005 - Topic 12-1 - LS: Uninterruptible Power Supplies (UPS), Power Factor Correctors (PFC), Modelling, simulation & control

EPE 2005 - Topic 12-1 - LS: Uninterruptible Power Supplies (UPS), Power Factor Correctors (PFC), Modelling, simulation & control
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 12: POWER SUPPLIES > EPE 2005 - Topic 12-1 - LS: Uninterruptible Power Supplies (UPS), Power Factor Correctors (PFC), Modelling, simulation & control

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   Analysis of an optimised single-phase UPS inverter based on a six-pack transistor module
By VAN DER BROECK Heinz [View]
[Download]

Abstract: The paper shows how a six-pack transistor inverter module can favorable be applied to a single-phase UPS application. Two fast switching parallel operating inverter legs are controlled by a phase shifted sinusoidal PWM pattern. The third inverter leg is switched with the fundamental frequency only. This leads to a circuit performance similar to that of 5-level PWM inverter. As a result the harmonic effects are minimized. Moreover, the losses in the six-pack module can be equally distributed to all semiconductors since the inverter legs are either stressed by higher conducting losses or by high switching losses. Within the paper all PWM harmonic effects of the inverter are described by analytical formulas

   Diode Recovery Characteristics Considerations for optimizing EMI performance of Continuous Mode PFC Converters
By BASU Supratim [View]
[Download]

Abstract: The design of the boost rectifier diode ratings of a Continuous Mode Boost PFC circuit is usually straight forward but the selection of the recovery characteristics is usually always decided by the final cost and efficiency requirements of the design. This paper explores the effect of diode recovery and it’s snap factor characteristics, on the overall EMI and efficiency performance of a Continuous Mode Boost PFC converter. By making extensive measurements and comparing the results of conducted and radiated EMI for three different diode types on a 1200 W prototype operating at about 70 kHz, a systematic design approach is suggested.

   Dynamic performance of the Buck converter with input voltage feedforward control
By SUNTIO Teuvo; SJOeROOS Jukk; KOSTOV Konstantin; KYYRAe Jorma [View]
[Download]

Abstract: The effect of input voltage feedforward (IVFF) on the dynamical performance of a buck converter is investigated. The IVFF scheme is implemented making the pulse-width-modulation (PWM) ramp directly proportional to the input voltage. Ideally the IVFF control would make the internal loop gain constant, perfect attenuation of input noise and resistive input impedance with the phase of 180 deg. The transientresponse of the converter is, however, deteriorated due to limited duty ratio.

   New Opportunities in DC/DC Conversion with Recent Developments of MOSFET Technologies
By AHLERS Dirk; GOERGENS Lutz; SANCHEZ Juan Miguel [View]
[Download]

Abstract: The requirements of modern DC/DC converters are changing rapidly with the increasing power requirements of modern micro-processors. Higher output currents at voltages approaching 1V, increasing output power and the need for system miniaturization become a real challenge for designers. In this paper we will review some of the basic topologies used in DC/DC conversion and establish a link to recent developments in the power MOSFET technologies as the enabling technology to further system miniaturization and efficiency.

EPE 2005 - Topic 12-1 - LS: Uninterruptible Power Supplies (UPS), Power Factor Correctors (PFC), Modelling, simulation & control
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2005 - Conference > EPE 2005 - Topic 12: POWER SUPPLIES > EPE 2005 - Topic 12-1 - LS: Uninterruptible Power Supplies (UPS), Power Factor Correctors (PFC), Modelling, simulation & control
	[return to parent folder]

	Analysis of an optimised single-phase UPS inverter based on a six-pack transistor module By VAN DER BROECK Heinz	[View] [Download]
Abstract: The paper shows how a six-pack transistor inverter module can favorable be applied to a single-phase UPS application. Two fast switching parallel operating inverter legs are controlled by a phase shifted sinusoidal PWM pattern. The third inverter leg is switched with the fundamental frequency only. This leads to a circuit performance similar to that of 5-level PWM inverter. As a result the harmonic effects are minimized. Moreover, the losses in the six-pack module can be equally distributed to all semiconductors since the inverter legs are either stressed by higher conducting losses or by high switching losses. Within the paper all PWM harmonic effects of the inverter are described by analytical formulas

	Diode Recovery Characteristics Considerations for optimizing EMI performance of Continuous Mode PFC Converters By BASU Supratim	[View] [Download]
Abstract: The design of the boost rectifier diode ratings of a Continuous Mode Boost PFC circuit is usually straight forward but the selection of the recovery characteristics is usually always decided by the final cost and efficiency requirements of the design. This paper explores the effect of diode recovery and it’s snap factor characteristics, on the overall EMI and efficiency performance of a Continuous Mode Boost PFC converter. By making extensive measurements and comparing the results of conducted and radiated EMI for three different diode types on a 1200 W prototype operating at about 70 kHz, a systematic design approach is suggested.

	Dynamic performance of the Buck converter with input voltage feedforward control By SUNTIO Teuvo; SJOeROOS Jukk; KOSTOV Konstantin; KYYRAe Jorma	[View] [Download]
Abstract: The effect of input voltage feedforward (IVFF) on the dynamical performance of a buck converter is investigated. The IVFF scheme is implemented making the pulse-width-modulation (PWM) ramp directly proportional to the input voltage. Ideally the IVFF control would make the internal loop gain constant, perfect attenuation of input noise and resistive input impedance with the phase of 180 deg. The transientresponse of the converter is, however, deteriorated due to limited duty ratio.

	New Opportunities in DC/DC Conversion with Recent Developments of MOSFET Technologies By AHLERS Dirk; GOERGENS Lutz; SANCHEZ Juan Miguel	[View] [Download]
Abstract: The requirements of modern DC/DC converters are changing rapidly with the increasing power requirements of modern micro-processors. Higher output currents at voltages approaching 1V, increasing output power and the need for system miniaturization become a real challenge for designers. In this paper we will review some of the basic topologies used in DC/DC conversion and establish a link to recent developments in the power MOSFET technologies as the enabling technology to further system miniaturization and efficiency.