An overview of efficiency and loss characterization of fractional horsepower motors

Agamloh, Emmanuel; Nagorny, Aleksandr

doi:10.1109/tie.2012.2200222

Cited by 11 publications

(6 citation statements)

References 17 publications

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“…A summary of test methods for polyphase induction motors (PPIM) and single-phase induction motors (SPIM) is presented as follows, with special focus on the necessary tests and measurements. Detailed calculations are available in [15] and in the cited references.…”

Section: Methods For Efficiency Determination Of Induction Motorsmentioning

confidence: 99%

“…The efficiency is computed through (1) and (2) after corrections of torque, input power and speed, related to the dynamometer drag, to the temperature influence on the stator and rotor winding resistances, and to the supply frequency deviations during the tests. The importance of dynamometer correction for fractional horsepower machines is highlighted in [15]. The stator winding resistance (Rs) is corrected to the specified temperature (ts) by (3) as a function of the resistance (Rt) at test temperature (tt) and of the constant k1, which is 234.5°C for copper windings and 225°C for aluminum.…”

Section: A Direct Methods (Input Output)mentioning

confidence: 99%

“…114 [12] contemplates only motors with a single run winding, thus not covering permanent capacitor, shaded-pole and split-phase motors. In contrast to the polyphase case, Pj2 is not negligible at no-load due to the negative sequence rotor currents induced by the backward field [15]. Therefore, an additional locked-rotor test (LRT) at 50% of rated voltage is required.…”

Section: B Segregation Of Losses With or Without Torque Measurementmentioning

confidence: 99%

“…Similar difficulties have been reported in [14], where tests with a rotating jig are performed for quality assessment of BLDC motors. A summary of test methods for fractional horsepower motors has been presented in [15] on a broader context, without considering the restrictions of inaccessible machines such as compressor mounted motors. In [6], the efficiency of the electric motor is simply assumed as a constant value of 85% to determine the efficiency of the remaining stages.…”

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confidence: 99%

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Efficiency Determination of Compressor Embedded Induction Motors

Wengerkievicz

Mazzola

Sadowski

et al. 2021

J. Microw. Optoelectron. Electromagn. Appl.

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Compressors operating in refrigeration systems, typically with built-in induction motors, represent an important energy demand. The applicability of standard methods for efficiency determination of induction motors is limited in this context by the constructive characteristics of these motors, such as the shared compressor frame and the inaccessibility of the shaft. The main contributions of this paper are to provide an overview of standard and alternative methods for efficiency testing of single and polyphase motors, according to technical standards and to the state of the art, and to offer guidelines for the method selection. The options cover dynamometer tests, loss segregation and equivalent circuit methods, some even applicable without direct access to the motor. Experimental application examples in single and threephase motors are presented. Beyond the context of compressors, the discussion is relevant for inaccessible motors in general.

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Section: Methods For Efficiency Determination Of Induction Motorsmentioning

confidence: 99%

Section: A Direct Methods (Input Output)mentioning

confidence: 99%

Section: B Segregation Of Losses With or Without Torque Measurementmentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Efficiency Determination of Compressor Embedded Induction Motors

Wengerkievicz

Mazzola

Sadowski

et al. 2021

J. Microw. Optoelectron. Electromagn. Appl.

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“…where ψ f can be obtained from (2). Based on the above derivations, the efficiency versus different no load EMF can be calculated, as shown in Fig.…”

Section: A Magnetic Load Design For High Efficiencymentioning

confidence: 99%

Improvements in permanent magnet synchronous machines with delta-connected winding

Gui

Wang

et al. 2014

IECON 2014 - 40th Annual Conference of the IEEE Industrial Electronics Society

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Compared with wye-connected winding machine, the delta-connected shows merits in wider constant power speed range (CPSR) and higher efficiency because of the full utilization of terminal voltage, which is promising for electric vehicles (EVs), industries and domestic appliances, etc. However, circulating loss caused by triple-order harmonics impedes the application of delta-connected winding in permanent magnet synchronous machines (PMSMs). This paper discusses the advantages of deltaconnected winding, and proposes an optimal design methodology on interior permanent magnet (IPM) rotors to minimize the triple-order harmonics, aiming to arouse the awareness of adopting delta connection in PMSMs for higher performance. A 22kW IPMSM prototype with delta-connected winding is manufactured, and the minimized triple order harmonics and super premium efficiency (IE4) are verified by experiments.Index Terms-Constant power speed range (CPSR), deltaconnected winding, IE4 efficiency, permanent magnet synchronous machine (PMSM).

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