Efficiency of VFD Coupled Induction Motors Operating in the Scalar Mode with Different Types of Loads

L. Latchoomun; C. Gokhool; R. T.F. Ah King; K. Busawon; J. P. Barbot

doi:10.1007/978-3-030-18240-3_5

Efficiency of VFD Coupled Induction Motors Operating in the Scalar Mode with Different Types of Loads

L. Latchoomun, C. Gokhool, R. T.F. Ah King^*, K. Busawon, J. P. Barbot

^*Corresponding author for this work

Mathematics, Physics and Electrical Engineering

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

1 Citation (Scopus)

Abstract

In this paper, we investigate the behaviour of scalar controlled AC Variable Frequency Drives for induction motors when coupled with different types of loads. It is well known that slip is more pronounced at high speeds rather than low speeds in loads such as in pumps and fans operation because the torque load varies as the square or cube of the speed. Slip compensation in Voltage/Frequency controlled Variable Frequency Drives may work only up to a certain limit since the problem can be exacerbated by overcompensation causing low magnetisation flux of the stator and the Variable Frequency Drive becomes uncontrollable. In this research work, we investigate the behaviour of the motor and Variable Frequency Drive assembly with regards to slowly changing loads from low to high speeds. Results show that at reduced speeds for the Variable Frequency Drive and motor assembly, the efficiency is lowest for square and cubic torques loads compared to linear and constant torque loads. Highest efficiency and torque are achieved only in a restricted interval of speed. This problem therefore compels us to avoid using the Variable Frequency Drives in the Voltage/Frequency mode at low speeds for pumps and fans.

Original language	English
Title of host publication	Smart and Sustainable Engineering for Next Generation Applications - Proceeding of the Second International Conference on Emerging Trends in Electrical, Electronic and Communications Engineering ELECOM 2018
Editors	Peter Fleming, Andreas Jakobsson, Beatrys Margaretha Lacquet, Saeid Sanei, Kalyanmoy Deb
Publisher	Springer
Pages	45-59
Number of pages	15
Volume	561
ISBN (Electronic)	9783030182403
ISBN (Print)	9783030182397
DOIs	https://doi.org/10.1007/978-3-030-18240-3_5
Publication status	Published - 2019
Event	2nd International Conference on Emerging Trends in Electrical, Electronic and Communications Engineering, ELECOM 2018 - Reduit, Mauritius Duration: 28 Nov 2018 → 30 Nov 2018

Publication series

Name	Lecture Notes in Electrical Engineering
Volume	561
ISSN (Print)	1876-1100
ISSN (Electronic)	1876-1119

Conference

Conference	2nd International Conference on Emerging Trends in Electrical, Electronic and Communications Engineering, ELECOM 2018
Country/Territory	Mauritius
City	Reduit
Period	28/11/18 → 30/11/18

Access to Document

10.1007/978-3-030-18240-3_5

Cite this

Latchoomun, L., Gokhool, C., Ah King, R. T. F., Busawon, K., & Barbot, J. P. (2019). Efficiency of VFD Coupled Induction Motors Operating in the Scalar Mode with Different Types of Loads. In P. Fleming, A. Jakobsson, B. M. Lacquet, S. Sanei, & K. Deb (Eds.), Smart and Sustainable Engineering for Next Generation Applications - Proceeding of the Second International Conference on Emerging Trends in Electrical, Electronic and Communications Engineering ELECOM 2018 (Vol. 561, pp. 45-59). (Lecture Notes in Electrical Engineering; Vol. 561). Springer. https://doi.org/10.1007/978-3-030-18240-3_5

Latchoomun, L. ; Gokhool, C. ; Ah King, R. T.F. et al. / Efficiency of VFD Coupled Induction Motors Operating in the Scalar Mode with Different Types of Loads. Smart and Sustainable Engineering for Next Generation Applications - Proceeding of the Second International Conference on Emerging Trends in Electrical, Electronic and Communications Engineering ELECOM 2018. editor / Peter Fleming ; Andreas Jakobsson ; Beatrys Margaretha Lacquet ; Saeid Sanei ; Kalyanmoy Deb. Vol. 561 Springer, 2019. pp. 45-59 (Lecture Notes in Electrical Engineering).

@inproceedings{519c89f699604cec807611510164c762,

title = "Efficiency of VFD Coupled Induction Motors Operating in the Scalar Mode with Different Types of Loads",

abstract = "In this paper, we investigate the behaviour of scalar controlled AC Variable Frequency Drives for induction motors when coupled with different types of loads. It is well known that slip is more pronounced at high speeds rather than low speeds in loads such as in pumps and fans operation because the torque load varies as the square or cube of the speed. Slip compensation in Voltage/Frequency controlled Variable Frequency Drives may work only up to a certain limit since the problem can be exacerbated by overcompensation causing low magnetisation flux of the stator and the Variable Frequency Drive becomes uncontrollable. In this research work, we investigate the behaviour of the motor and Variable Frequency Drive assembly with regards to slowly changing loads from low to high speeds. Results show that at reduced speeds for the Variable Frequency Drive and motor assembly, the efficiency is lowest for square and cubic torques loads compared to linear and constant torque loads. Highest efficiency and torque are achieved only in a restricted interval of speed. This problem therefore compels us to avoid using the Variable Frequency Drives in the Voltage/Frequency mode at low speeds for pumps and fans.",

keywords = "Direct Torque Control (DTC), Field Orientated Control (FOC), Pulse Width Modulation (PWM), Variable Frequency Drive (VFD), Vectorial Flux Control (VFC)",

author = "L. Latchoomun and C. Gokhool and {Ah King}, {R. T.F.} and K. Busawon and Barbot, {J. P.}",

year = "2019",

doi = "10.1007/978-3-030-18240-3_5",

language = "English",

isbn = "9783030182397",

volume = "561",

series = "Lecture Notes in Electrical Engineering",

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pages = "45--59",

editor = "Peter Fleming and Andreas Jakobsson and Lacquet, {Beatrys Margaretha} and Saeid Sanei and Kalyanmoy Deb",

booktitle = "Smart and Sustainable Engineering for Next Generation Applications - Proceeding of the Second International Conference on Emerging Trends in Electrical, Electronic and Communications Engineering ELECOM 2018",

address = "Germany",

note = "2nd International Conference on Emerging Trends in Electrical, Electronic and Communications Engineering, ELECOM 2018 ; Conference date: 28-11-2018 Through 30-11-2018",

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Latchoomun, L, Gokhool, C, Ah King, RTF, Busawon, K & Barbot, JP 2019, Efficiency of VFD Coupled Induction Motors Operating in the Scalar Mode with Different Types of Loads. in P Fleming, A Jakobsson, BM Lacquet, S Sanei & K Deb (eds), Smart and Sustainable Engineering for Next Generation Applications - Proceeding of the Second International Conference on Emerging Trends in Electrical, Electronic and Communications Engineering ELECOM 2018. vol. 561, Lecture Notes in Electrical Engineering, vol. 561, Springer, pp. 45-59, 2nd International Conference on Emerging Trends in Electrical, Electronic and Communications Engineering, ELECOM 2018, Reduit, Mauritius, 28/11/18. https://doi.org/10.1007/978-3-030-18240-3_5

Efficiency of VFD Coupled Induction Motors Operating in the Scalar Mode with Different Types of Loads. / Latchoomun, L.; Gokhool, C.; Ah King, R. T.F. et al.

Smart and Sustainable Engineering for Next Generation Applications - Proceeding of the Second International Conference on Emerging Trends in Electrical, Electronic and Communications Engineering ELECOM 2018. ed. / Peter Fleming; Andreas Jakobsson; Beatrys Margaretha Lacquet; Saeid Sanei; Kalyanmoy Deb. Vol. 561 Springer, 2019. p. 45-59 (Lecture Notes in Electrical Engineering; Vol. 561).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Efficiency of VFD Coupled Induction Motors Operating in the Scalar Mode with Different Types of Loads

AU - Latchoomun, L.

AU - Gokhool, C.

AU - Ah King, R. T.F.

AU - Busawon, K.

AU - Barbot, J. P.

PY - 2019

Y1 - 2019

N2 - In this paper, we investigate the behaviour of scalar controlled AC Variable Frequency Drives for induction motors when coupled with different types of loads. It is well known that slip is more pronounced at high speeds rather than low speeds in loads such as in pumps and fans operation because the torque load varies as the square or cube of the speed. Slip compensation in Voltage/Frequency controlled Variable Frequency Drives may work only up to a certain limit since the problem can be exacerbated by overcompensation causing low magnetisation flux of the stator and the Variable Frequency Drive becomes uncontrollable. In this research work, we investigate the behaviour of the motor and Variable Frequency Drive assembly with regards to slowly changing loads from low to high speeds. Results show that at reduced speeds for the Variable Frequency Drive and motor assembly, the efficiency is lowest for square and cubic torques loads compared to linear and constant torque loads. Highest efficiency and torque are achieved only in a restricted interval of speed. This problem therefore compels us to avoid using the Variable Frequency Drives in the Voltage/Frequency mode at low speeds for pumps and fans.

AB - In this paper, we investigate the behaviour of scalar controlled AC Variable Frequency Drives for induction motors when coupled with different types of loads. It is well known that slip is more pronounced at high speeds rather than low speeds in loads such as in pumps and fans operation because the torque load varies as the square or cube of the speed. Slip compensation in Voltage/Frequency controlled Variable Frequency Drives may work only up to a certain limit since the problem can be exacerbated by overcompensation causing low magnetisation flux of the stator and the Variable Frequency Drive becomes uncontrollable. In this research work, we investigate the behaviour of the motor and Variable Frequency Drive assembly with regards to slowly changing loads from low to high speeds. Results show that at reduced speeds for the Variable Frequency Drive and motor assembly, the efficiency is lowest for square and cubic torques loads compared to linear and constant torque loads. Highest efficiency and torque are achieved only in a restricted interval of speed. This problem therefore compels us to avoid using the Variable Frequency Drives in the Voltage/Frequency mode at low speeds for pumps and fans.

KW - Direct Torque Control (DTC)

KW - Field Orientated Control (FOC)

KW - Pulse Width Modulation (PWM)

KW - Variable Frequency Drive (VFD)

KW - Vectorial Flux Control (VFC)

U2 - 10.1007/978-3-030-18240-3_5

DO - 10.1007/978-3-030-18240-3_5

M3 - Conference contribution

AN - SCOPUS:85065923854

SN - 9783030182397

VL - 561

T3 - Lecture Notes in Electrical Engineering

SP - 45

EP - 59

BT - Smart and Sustainable Engineering for Next Generation Applications - Proceeding of the Second International Conference on Emerging Trends in Electrical, Electronic and Communications Engineering ELECOM 2018

A2 - Fleming, Peter

A2 - Jakobsson, Andreas

A2 - Lacquet, Beatrys Margaretha

A2 - Sanei, Saeid

A2 - Deb, Kalyanmoy

PB - Springer

T2 - 2nd International Conference on Emerging Trends in Electrical, Electronic and Communications Engineering, ELECOM 2018

Y2 - 28 November 2018 through 30 November 2018

ER -

Latchoomun L, Gokhool C, Ah King RTF, Busawon K, Barbot JP. Efficiency of VFD Coupled Induction Motors Operating in the Scalar Mode with Different Types of Loads. In Fleming P, Jakobsson A, Lacquet BM, Sanei S, Deb K, editors, Smart and Sustainable Engineering for Next Generation Applications - Proceeding of the Second International Conference on Emerging Trends in Electrical, Electronic and Communications Engineering ELECOM 2018. Vol. 561. Springer. 2019. p. 45-59. (Lecture Notes in Electrical Engineering). https://doi.org/10.1007/978-3-030-18240-3_5

Efficiency of VFD Coupled Induction Motors Operating in the Scalar Mode with Different Types of Loads

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