Three alternative methods to determine voltage source converter losses

Aarniovuori, Lassi; Musikka, Tatu; Kosonen, Antti; Niemelä, Markku; Pyrhönen, Juha

doi:10.1109/epe.2015.7309454

Cited by 14 publications

(5 citation statements)

References 7 publications

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“…The analytical calculation procedure requires the knowledge of the converter's internal parameters such as semiconductor devices' threshold voltages, on-state resistances and switching losses. The analytical calculation procedure following the European standard EN50598 concluded in collaboration of converter manufacturer is presented in [33] for a 45 kVA VSC, but the results are not comprehensive and they are not given at the standardized test points. 0278-0046 (c) 2019 IEEE.…”

Section: Experimental Tests According To Iec 61800-9-2mentioning

confidence: 99%

Voltage-Source Converter Energy Efficiency Classification in Accordance With IEC 61800-9-2

Aarniovuori

Kärkkäinen

Anuchin

et al. 2020

IEEE Trans. Ind. Electron.

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New global energy efficiency classification standard IEC 61800-9-2 for frequency converters and motor systems has been recently launched. It classifies the energy efficiency of the converters and motor-drive systems and introduces three different methods to determine a voltage source converter (VSC) losses for the classification. In here, experimental tests are carried out using the input-output method and the calorimetric method to determine the losses and efficiency of a 160 kW commercial voltage source converter (VSC). The measurement results with these two independent methods are compared and the uncertainty of the methods are analyzed. The converter electric input and output power distributions are analyzed in the frequency domain and are used further to estimate the electric power measurement uncertainty. The measurement uncertainty related to losses obtained with the input-output method is compared with the loss difference between the two methods. This is the first research work to accurately evaluate the experimental methods for the determination of the power losses and examine the validity of the energy efficiency classes of the frequency converters according to new IEC61800-9-2. An urgent need to update the loss boundaries of the IE-classes has been found and the measurement uncertainty effect on the IE-classification is discussed.

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Section: Experimental Tests According To Iec 61800-9-2mentioning

confidence: 99%

Voltage-Source Converter Energy Efficiency Classification in Accordance With IEC 61800-9-2

Aarniovuori

Kärkkäinen

Anuchin

et al. 2020

IEEE Trans. Ind. Electron.

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“…In addition, the increase in the energy efficiency of a variable speed drive can be achieved by increasing the efficiency of the frequency converter and/or the complete "power drive system" (PDS) as a whole (motor + FC). The IE classes of the converters and IES classes of the complete PDS are defined in IEC 61800-9-2 [5,6]. This standard also uses the term "complete drive module" (CDM) which includes FC, as well as additional peripheral devices such as electromagnetic compatibility filters [5].…”

Section: Introductionmentioning

confidence: 99%

Efficiency Analysis of Low Electric Power Drives Employing Induction and Synchronous Reluctance Motors in Pump Applications

et al. 2019

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Due to the rapid increase in the number of variable speed AC drives, the analysis of their energy efficiency has become highly essential. However, such an analysis requires consideration of a wide variety of factors. This includes considering the energy loss in the frequency converter, depending on the motor type. In this article, a computational comparison of the energy properties of variable frequency pump drive employing two types of electric machines, i.e. an induction and a synchronous reluctance motor, is presented. The effect of the motor type on the losses in a low-voltage two-stage frequency converter using analytical and numerical models, with a further comparison, is investigated. Furthermore, an alternative approach to determine the current magnitude and power factor of the load of the converter is suggested. Eventually, this study provides a quantitative estimate of the increase in losses in the converter caused by using the two different motor types. Several experimental tests are conducted on induction and synchronous 1.1 kW reluctance motors.

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“…Three different methods; input-output, calorimetric, and calculation are used in [6] to obtain the losses of a voltage source converter. However, in practice the calculation procedure is only available for converter manufactures and the calorimetric method needs highly skilled technicians and special arrangements.…”

Section: Introductionmentioning

confidence: 99%

Analytical Evaluation of High-Efficiency Induction Motor Losses

Aarniovuori

Lindh

Kärkkäinen

et al. 2019

2019 IEEE International Electric Machines &Amp; Drives Conference (IEMDC)

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The frequency converter driven IM can be used as a reference for the efficiency level of a drive system. In here, the losses and efficiency of a 75 kW IE3 -rated modern squirrel-cage induction motor are investigated experimentally. First, the result of IEC loss segregation with sinusoidal supply is used to create a reference point. Secondly, five different commercially available voltage source converters are used to drive the same motor in 30 measurement points up to the rated speed and torque. The losses and efficiencies are analyzed with torque values of 10%, 25%, 50%, 75% and 100% of the rated torque of the motor and supply frequency values of 10%, 25%, 50%, 75%, 90% and 100% of the rated motor frequency. The results are presented as frequencytorque maps and the loss values are given as Table values. Three of these converters show very similar performance from the energy efficiency point of view. The input-output method is used to determine the losses of the motor and converter.

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Three alternative methods to determine voltage source converter losses

Cited by 14 publications

References 7 publications

Voltage-Source Converter Energy Efficiency Classification in Accordance With IEC 61800-9-2

Voltage-Source Converter Energy Efficiency Classification in Accordance With IEC 61800-9-2

Efficiency Analysis of Low Electric Power Drives Employing Induction and Synchronous Reluctance Motors in Pump Applications

Analytical Evaluation of High-Efficiency Induction Motor Losses

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