EPE Association: EPE 2007 - Subtopic 05-4 - LS: Hard switching converters

EPE 2007 - Subtopic 05-4 - LS: Hard switching converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 05: 'Hard switching converters and control' > EPE 2007 - Subtopic 05-4 - LS: Hard switching converters

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   A Cascaded H-Bridge BLDC Drive Incorporating Battery Management
By BINGHAM Chris; WILKIE Keir; STONE Dave; FOSTER Martin [View]
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Abstract: A multilevel BLDC drive is proposed using cascaded H-bridges with isolated sources to provide superior output waveforms and reduced current ripple whilst incorporating observer based SoC estimation. Energy management, based on SoC, is incorporated to improve battery performance, reduce variation between cells and to control charge/discharge profiles.

   A new 7.2kV Medium Voltage 3-Level-NPC inverter using 6.5kV-IGBTs
By GEDIGA Swen; DIETRICH Christian; SOMMER Rainer; HILLER Marc; TISCHMACHER Hans [View]
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Abstract: The SINAMICS GM150 IGBT, a new 3-Level-Neutral-Point-Clamped (3L-NPC) Voltage-Source-Converter (VSC) with series-connected 6.5kV-IGBTs for industrial Medium Voltage Drives is presented. It covers the output voltage range from 6kV up to 7.2kV without the need for a step-up output transformer. The SINAMICS GM150 IGBT is based on the proven basic design of its predecessor SIMOVERT MV while the output voltage and current ratings have been extended. The maximum available output power of the water cooled version with a parallel connection of two inverters is 8.7MVA at an output voltage of 7.2kV. For the power section state of the art IGBT modules with AlSiC base plates are used. The dynamic voltage sharing for the IGBTs is done by the gate drive units without any additional passive snubber circuits. For the NPC-diodes small passive snubber circuits are used to ensure the dynamic voltage balancing. The mechanical design, the semiconductor ratings and the available converter performance of the SINAMICS GM150 (IGBT) is described. An additional focus is put on the semiconductor switching characteristics in series-connection as well as on the design and the performance of the sinusoidal output filter which is required in retrofit applications with conventional line motors.

   A NEW BALANCING TECHNIQUE WITH POWER LOSSES MINIMIZATION IN DIODE-CLAMPED MULTILEVEL CONVERTERS
By BORGHETTI Giovanni; MARCHESONI Mario; CARPANETO Matteo; VACCARO Luis; TENCA Pierluigi [View]
[Download]

Abstract: A new PWM technique, capable of achieving a correct dc-link capacitor voltages balance in Diode-Clamped Multilevel inverters, within the limits defined by the theory, is presented. This result is obtained while decreasing the switching power losses when compared to techniques based on the use of redundant switching vectors. The combined use of such a technique and of additional chopper stages permits the correct operation of the converter in all operating conditions, maximizing the energy efficiency and decreasing the cost of the additional passive and active components. A detailed explanation of the new devised PWM technique and the main results, including the evaluation of the converter efficiency in the most significant operating points, are reported.

EPE 2007 - Subtopic 05-4 - LS: Hard switching converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2007 - Conference > EPE 2007 - Topic 05: 'Hard switching converters and control' > EPE 2007 - Subtopic 05-4 - LS: Hard switching converters
	[return to parent folder]

	A Cascaded H-Bridge BLDC Drive Incorporating Battery Management By BINGHAM Chris; WILKIE Keir; STONE Dave; FOSTER Martin	[View] [Download]
Abstract: A multilevel BLDC drive is proposed using cascaded H-bridges with isolated sources to provide superior output waveforms and reduced current ripple whilst incorporating observer based SoC estimation. Energy management, based on SoC, is incorporated to improve battery performance, reduce variation between cells and to control charge/discharge profiles.

	A new 7.2kV Medium Voltage 3-Level-NPC inverter using 6.5kV-IGBTs By GEDIGA Swen; DIETRICH Christian; SOMMER Rainer; HILLER Marc; TISCHMACHER Hans	[View] [Download]
Abstract: The SINAMICS GM150 IGBT, a new 3-Level-Neutral-Point-Clamped (3L-NPC) Voltage-Source-Converter (VSC) with series-connected 6.5kV-IGBTs for industrial Medium Voltage Drives is presented. It covers the output voltage range from 6kV up to 7.2kV without the need for a step-up output transformer. The SINAMICS GM150 IGBT is based on the proven basic design of its predecessor SIMOVERT MV while the output voltage and current ratings have been extended. The maximum available output power of the water cooled version with a parallel connection of two inverters is 8.7MVA at an output voltage of 7.2kV. For the power section state of the art IGBT modules with AlSiC base plates are used. The dynamic voltage sharing for the IGBTs is done by the gate drive units without any additional passive snubber circuits. For the NPC-diodes small passive snubber circuits are used to ensure the dynamic voltage balancing. The mechanical design, the semiconductor ratings and the available converter performance of the SINAMICS GM150 (IGBT) is described. An additional focus is put on the semiconductor switching characteristics in series-connection as well as on the design and the performance of the sinusoidal output filter which is required in retrofit applications with conventional line motors.

	A NEW BALANCING TECHNIQUE WITH POWER LOSSES MINIMIZATION IN DIODE-CLAMPED MULTILEVEL CONVERTERS By BORGHETTI Giovanni; MARCHESONI Mario; CARPANETO Matteo; VACCARO Luis; TENCA Pierluigi	[View] [Download]
Abstract: A new PWM technique, capable of achieving a correct dc-link capacitor voltages balance in Diode-Clamped Multilevel inverters, within the limits defined by the theory, is presented. This result is obtained while decreasing the switching power losses when compared to techniques based on the use of redundant switching vectors. The combined use of such a technique and of additional chopper stages permits the correct operation of the converter in all operating conditions, maximizing the energy efficiency and decreasing the cost of the additional passive and active components. A detailed explanation of the new devised PWM technique and the main results, including the evaluation of the converter efficiency in the most significant operating points, are reported.