Design of a Flexible Control Platform for Soft-Switching Multi-Level Inverters

Köllensperger, P.; Lenke, Robert U.; Schröder, S.; Doncker, Rik W. De

doi:10.1109/pesc.2005.1581737

Cited by 6 publications

(4 citation statements)

References 20 publications

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“…Significant inconveniencies of soft-switching systems proposed so far concern connections between capacitors, inductors, and switches. In systems described in [10,[13][14][15][16], capacitors are connected in parallel to main switches. Note that in some low-rated power inverters, parasitic capacitances of a given switch are used, but this refers to soft-switching systems with MOSFETs [11][12][13].…”

Section: Power Losses Analysismentioning

confidence: 99%

“…Typically, soft-switching solutions have additional circuits containing, among others, capacitors connected to main switches [7,10,[13][14][15][16]. In the case of disturbances, one of the main switches may be turned ON at a non-zero voltage of the capacitor which is connected in parallel with this switch; as a result, the switch current may reach an unacceptable value.…”

Section: Introductionmentioning

confidence: 99%

“…In the case of disturbances, one of the main switches may be turned ON at a non-zero voltage of the capacitor which is connected in parallel with this switch; as a result, the switch current may reach an unacceptable value. In other existing solutions of soft-switching, transistors or the above-mentioned thyristors are connected in series with additional inductors or with inductive loads [4,10,11,14]. When a given switch is turned OFF at a non-zero current of the inductor, then an overvoltage appears, which is usually dangerous to this switch.…”

Section: Introductionmentioning

confidence: 99%

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A New Soft-Switching Solution in Three-Level Neutral-Point-Clamped Voltage Source Inverters

2021

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This paper presents a new soft-switching solution recommended for three-level neutral-point-clamped inverters. The operation principles of the proposed solution, working stages, selection of elements, and the control algorithm are comprehensively discussed herein. The control method of the inverter main switches is the same as that of the switches of an inverter operating according to the hard-switching technique. The correctness of the proposed solution was confirmed by the results of different tests using a laboratory neutral-point-clamped inverter with rated parameters of 3 kW, 2 × 150 V, 12 A, and 3 kHz. Numerical analyses were performed for the inverter of rated power 1.2 MW. The switching losses of the inverter operating with the proposed solution were compared with those of an inverter with hard-switching method. The proposed soft-switching solution increased the inverter efficiency and its competitiveness in relation to other proposals because there were no connections between switches and capacitors or inductors, which pose a risk of damaging the inverter when disturbances in the control system appear.

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Section: Power Losses Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A New Soft-Switching Solution in Three-Level Neutral-Point-Clamped Voltage Source Inverters

2021

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“…Reference [9] talks about an ARCP with an autotransformer in the neutral-point-clamped (NPC) three-level inverter, but this topology can not achieve the half-current cutback. References [10], [11] present the way to control safely an ARCP topology, taking into account the auxiliary losses. Derived from these concepts, a unidirectional resonant pole is described and tested in [12], [12] for a threelevel power factor corrector (PFC) rectifier.…”

Section: Introductionmentioning

confidence: 99%

Efficiency improvement in soft-switching three-level converters for high power UPS

Rizet

Ferrieux

Moigne

et al. 2010

2010 IEEE Energy Conversion Congress and Exposition

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Efficiency of high power Uninterruptible Power Supplies (UPS) is a fundamental criterion regarding the permanent use of such a device. A state of the art on softswitching over constraint of the UPS application has been made. The principle of Auxiliary Resonant Commutated Pole (ARCP) using autotransformer has been identified as the most interesting way to increase efficiency or switching frequency. Its application for multi-level converters has been studied. A simplified resonant pole has been proposed for both three-level rectifier and inverter used in UPS. The design criteria have been discussed. A single phase of a 125 kVA three-level UPS has been realized and tested. The concept has been validated.

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A novel three-level active neutral-point-clamped zero-voltage switching converter using coupled magnetic

Jin

Liu

Boroyevich

2011

2011 Twenty-Sixth Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

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Design of a Flexible Control Platform for Soft-Switching Multi-Level Inverters

Cited by 6 publications

References 20 publications

A New Soft-Switching Solution in Three-Level Neutral-Point-Clamped Voltage Source Inverters

A New Soft-Switching Solution in Three-Level Neutral-Point-Clamped Voltage Source Inverters

Efficiency improvement in soft-switching three-level converters for high power UPS

A novel three-level active neutral-point-clamped zero-voltage switching converter using coupled magnetic

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