Thermal evaluation of TEFC induction motors operating on frequency controlled variable speed drives

Valenzuela, M. Aníbal; Tapia, Juan A.; Rooks, J.A.

doi:10.1109/papcon.2003.1216913

Cited by 6 publications

(6 citation statements)

References 4 publications

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“…The power loss of an induction motor can be expressed as [5], [6], [15], [23] P loss = P cu + P iron + P mech + P stray + P harm .…”

Section: Induction Motor Lossesmentioning

confidence: 99%

“…The operating temperatures in the stator and rotor windings, in turn, depend on the operating duty cycle and the ambient temperature [23]. The stator and rotor currents depend on the load torque and converter control strategy.…”

Section: Induction Motor Lossesmentioning

confidence: 99%

“…and each of its terms depends on the operating frequency and flux [23]. Mechanical loss P mech includes friction and windage components.…”

Section: Induction Motor Lossesmentioning

confidence: 99%

See 2 more Smart Citations

Expected Savings Using Loss-Minimizing Flux on IM Drives—Part I: Optimum Flux and Power Savings for Minimum Losses

Rebolledo

Valenzuela

2015

IEEE Trans. on Ind. Applicat.

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The operation of variable-speed ac drives with loss-minimizing flux strategies can produce important energy savings without the need of any investment. This paper proposes algorithms for the evaluation of loss motor components and the flux level that produces the minimum-loss operating condition, covering the whole constant-torque operating region. Both scalar and vector drives are considered, although it is found that the operation of scalar-and vector-controlled drives with optimum flux (or d-axis current) gives very similar results for the same operating points. Evaluation is done using four induction motors of 4, 11, 55, and 110 kW. Results confirm that important savings can be achieved, especially in applications where motors operate with high speed and low to moderate load torque. Results will be used in a follow-up paper to evaluate the expected savings of the use of these strategies in a pulp mill and in a paper mill. Index Terms-AC drives, energy efficiency, induction motors. 0093-9994

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“…The power loss of an induction motor can be expressed as [5], [6], [15], [23] P loss = P cu + P iron + P mech + P stray + P harm .…”

Section: Induction Motor Lossesmentioning

confidence: 99%

Section: Induction Motor Lossesmentioning

confidence: 99%

See 1 more Smart Citation

Expected Savings Using Loss-Minimizing Flux on IM Drives—Part I: Optimum Flux and Power Savings for Minimum Losses

Rebolledo

Valenzuela

2015

IEEE Trans. on Ind. Applicat.

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show abstract

“…The power loss of an induction motor can be expressed as [5], [6], [15], [23] ܲ ௦௦ ൌ ܲ ௨ ܲ ܲ ܲ ௦௧௬ ܲ…”

Section: Induction Motor Lossesmentioning

confidence: 99%

“…The operating temperatures in the stator and rotor windings in turn depend on the operating duty cycle and the ambient temperature [23]. Stator and rotor currents depend on the load torque and converter control strategy.…”

Section: Induction Motor Lossesmentioning

confidence: 99%

Expected savings using loss-minimizing flux on im drives Part I: Optimum flux and power savings for minimum losses

Cabezas¹,

Valenzuela²

2014

Conference Record of 2014 Annual Pulp and Paper Industry Technical Conference

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The operation of variable speed ac drives with loss-minimizing flux strategies can produce important energy savings. This paper proposes algorithms for the evaluation of loss power components, and the flux level that produces minimum loss operating condition, covering the whole constant torque operating region. Both scalar and vector drives are considered, although it is found that the operation of scalar and vector controlled drives with optimum flux (or d-axis current) gives very similar results for the same operating points. Evaluation is done using four induction motors of 4 kW, 11 kW, 55 kW, and 110 kW. Results confirm that important savings can be achieved, especially in applications where motors operate with high speed and low to moderate load torque. Results will be used in a follow-up paper to evaluate the expected savings of the use of these strategies in a pulp mill and in a paper mill.

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Thermally degraded speed estimation of traction machine drive in electric vehicle

Ali

Hossain

Wang

et al. 2021

IET Electric Power Appl

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The speed of an induction machine drive (IMD) in the electrified powertrain of an electric vehicle (EV) suffers from thermal degradation caused by EV loading, driving cycle schedules, EV operating conditions, traffic state and temperature. It is necessary to estimate this thermal degradation in order to design appropriate control methodologies to address this significant issue that directly affects the EV performance. This study proposes a robust linear parameter varying (LPV) observer to estimate this degradation in IMD as well as EV speed under various thermal and loading conditions in steady state and during large transients. The stability and robustness of LPV methodology is ensured by optimal gains of H ∞ control and linear matrix inequalities using convex optimisation techniques. The weighting functions in LPV design are optimised by genetic algorithms. The proposed observer performance is compared with that of conventional sensorless field-oriented control and sliding mode observer. An improved speed performance during EV operation is also presented to validate the robustness of the proposed LPV observer against New European Driving Cycle. The performance analysis is conducted through NI myRIO 1900 controller-based electrical drive set-up. K E Y W O R D S electric vehicle, genetic algorithms, induction machine drive, linear parameter varying control, thermally degraded speedThis is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Thermal evaluation of TEFC induction motors operating on frequency controlled variable speed drives

Cited by 6 publications

References 4 publications

Expected Savings Using Loss-Minimizing Flux on IM Drives—Part I: Optimum Flux and Power Savings for Minimum Losses

Expected Savings Using Loss-Minimizing Flux on IM Drives—Part I: Optimum Flux and Power Savings for Minimum Losses

Expected savings using loss-minimizing flux on im drives Part I: Optimum flux and power savings for minimum losses

Thermally degraded speed estimation of traction machine drive in electric vehicle

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