Design of Water-Cooled Calorimeter for Electric Motor's Power Loss Measurement

Nair, Devi Geetha; Daryabin, Shayan; Jannasch, Steven; Haavisto, Ari; Arkkio, Antero

doi:10.1109/icelmach.2018.8507232

Cited by 2 publications

(2 citation statements)

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“…Thus, the heat circuit of the box is a closed circuit and the heat can only be lost through the walls of the calorimeter. The power loss through the walls (Pwalls) is equal to (6).…”

Section: Measurement Proceduresmentioning

confidence: 99%

Calorimetric Efficiency Determination of Power Electronic Variable Speed Drives

Caron

Berteyn

Defreyne

et al. 2021

Springer Proceedings in Energy

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A calorimeter test bench for the efficiency and power loss determination of power electronic variable speed drives is presented. The balanced calorimetric setup with air as the cooling medium is proposed to test small electronic drives for AC motors in a power range from 1 kW up to 7,5 kW. The construction, the required measurement equipment, the measurement procedure and especially the measurement results and uncertainty are important aspects of this test bench and are discussed in this paper. The device under test is a 2,2kW drive which is measured using both the input-output method and the calorimetric method. The test results are compared and conclusions are made concerning usability, repeatability and accuracy of the test bench. The overall goal is to further examine and optimize the calorimetric approach and to be able to obtain more accurate and comparable test results of very high efficient frequency converters. This setup reaches an uncertainty of ±2,39% or ±1,48W on the power loss at full load and speed using the calorimetric method.

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“…Thus, the heat circuit of the box is a closed circuit and the heat can only be lost through the walls of the calorimeter. The power loss through the walls (Pwalls) is equal to (6).…”

Section: Measurement Proceduresmentioning

confidence: 99%

Calorimetric Efficiency Determination of Power Electronic Variable Speed Drives

Caron

Berteyn

Defreyne

et al. 2021

Springer Proceedings in Energy

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“…With this, the unknown power loss of the motor can be determined from the measured coolant power. A detailed overview of the design process and power loss measurement of the induction motor is presented in [24].…”

Section: Measurement With Calorimetermentioning

confidence: 99%

Power loss segregation in electrical machines through calorimetry and inverse thermal modelling

Nair

Arkkio

Haavisto

2020

IET Electric Power Applications

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This study combines calorimetric measurement of power loss of an induction motor with inverse thermal mapping of its temperatures to segregate the net power loss into its constituent components. Constrained least square fitting is the tool used to achieve the inverse mapping. The lumped thermal network of the motor serves as the forward thermal model, establishing the physical relationship between the motor's power losses and its resultant temperature rises. The objective of the iterative minimisation is to find the actual loss components that correspond to the temperatures measured, and which sum up to the total loss of the motor that is measured with a calorimeter. Data ranges and constraints are imposed to attain a reasonable, unique solution. Each loss component predicted by the inverse mapping inherently includes the contribution from stray load losses as it is fitted to the measured temperatures of the motor. Given the challenges, this inverse thermal routine achieves the loss segregation in a fairly good fashion.

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Design of Water-Cooled Calorimeter for Electric Motor's Power Loss Measurement

Abstract: This thesis consists of an overview and of the following publications which are referred to in the text by their Roman numerals.

Cited by 2 publications

References 74 publications

Calorimetric Efficiency Determination of Power Electronic Variable Speed Drives

Calorimetric Efficiency Determination of Power Electronic Variable Speed Drives

Power loss segregation in electrical machines through calorimetry and inverse thermal modelling

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