A Simplified Model for Mechanical Loads under Angular Misalignment and Unbalance
This paper presents a dynamic model for mechanical
loads of an electric drive, including angular misalignment and
including load unbalance. The misalignment model represents the
effects of the universal joint between the motor and the mechanical
load. Simulation results are presented for an induction motor driving
a mechanical load with angular misalignment for both flexible and
rigid coupling. The models presented are very useful in the study of
mechanical fault detection in induction motors, using mechanical and
electrical signals already available in a drive system, such as speed,
torque and stator currents.
<p>[1] M. Xu and R.D. Marangoni, “Vibration Analysis Of A Motor-flexible
Coupling-Rotor System Subject To Misalignment And Unbalance, Part
I: Theoretical Model and Analysis”, Journal of Sound and Vibration,
Volume 176, Issue 5, 6 October 1994, Pages 681-691.
[2] T.H. Patel, and A.K. Darpe, “Experimental investigations on vibration
response of misaligned rotors.” In: Mechanical Systems and Signal
Processing, Volume 23, Issue 7, October 2009, Pages 2236-2252.
[3] A. Kr. Jalan and A.R. Mohanty, “Model based fault diagnosis of a rotor–
bearing system for misalignment and unbalance under steady-state
condition.” In Journal of Sound and Vibration, Volune 327, Issues 3-5,
13 November 2009, Pages 604-622.
[4] M.E.H. Benbouzid and G.B., Kliman, "What stator current processingbased
technique to use for induction motor rotor faults diagnosis?" In:
Transactions on Energy Conversion, , vol.18, no.2, pp. 238- 244, June
2003.
[5] M. Tsypkin, "Induction motor condition monitoring: Vibration analysis
technique - A practical implementation." In: Electric Machines & Drives
Conference (IEMDC), 2011 IEEE International , vol., no., pp.406-411,
15-18 May 2011.
[6] A.S. Sekhar, B.S. Prabhu, “Effects of coupling misalignment on
vibrations of rotating machinery.” In: Journal of Sound and Vibration,
Volume 185, Issue 4, 31 August 1995, Pages 655-671.
[7] H.P.Bloch, F.K.Geitner , Balancing of machinery components. In:
Bloch, H.P.; Geitner ,F.K. Practical Machinery Management for Process
Plants, Gulf Professional Publishing, 2005, Volume 3, Pages 258-366.
[8] C. Kral, T.G.Habetler, R.G. Harley, Detection of mechanical imbalances
of induction machines without spectral analysis of time-domain
signals. In: Industry Applications, IEEE Transactions on , vol.40, no.4,
pp. 1101- 1106, July-Aug. 2004.
[9] J.M. Bossio, G.R. Bossio and C.H. De Angelo, "Angular misalignment
in induction motors with flexible coupling." In: Industrial Electronics,
2009. IECON '09. 35th Annual Conference of IEEE , vol., no., pp.1033-
1038, 3-5 Nov. 2009.
[10] R.R. Obaid, T.G. Habetler and R.M. Tallam, “Detecting load unbalance
and shaft misalignment using stator current in inverter-driven induction
motors.” In: Electric Machines and Drives Conference, 2003.
IEMDC'03. IEEE International, vol.3, pp. 1454- 1458 vol.3, 1-4 June
2003.
[11] R.R. Obaid, T.G. Habetlerand D.J. Gritter, “A simplified technique for
detecting mechanical faults using stator current in small induction
motors.” In: Industry Applications Conference, 2000. Conference
Record of the 2000 IEEE, vol.1, no., pp.479-483 vol.1, 2000.</p>
<p>[1] M. Xu and R.D. Marangoni, “Vibration Analysis Of A Motor-flexible
Coupling-Rotor System Subject To Misalignment And Unbalance, Part
I: Theoretical Model and Analysis”, Journal of Sound and Vibration,
Volume 176, Issue 5, 6 October 1994, Pages 681-691.
[2] T.H. Patel, and A.K. Darpe, “Experimental investigations on vibration
response of misaligned rotors.” In: Mechanical Systems and Signal
Processing, Volume 23, Issue 7, October 2009, Pages 2236-2252.
[3] A. Kr. Jalan and A.R. Mohanty, “Model based fault diagnosis of a rotor–
bearing system for misalignment and unbalance under steady-state
condition.” In Journal of Sound and Vibration, Volune 327, Issues 3-5,
13 November 2009, Pages 604-622.
[4] M.E.H. Benbouzid and G.B., Kliman, "What stator current processingbased
technique to use for induction motor rotor faults diagnosis?" In:
Transactions on Energy Conversion, , vol.18, no.2, pp. 238- 244, June
2003.
[5] M. Tsypkin, "Induction motor condition monitoring: Vibration analysis
technique - A practical implementation." In: Electric Machines & Drives
Conference (IEMDC), 2011 IEEE International , vol., no., pp.406-411,
15-18 May 2011.
[6] A.S. Sekhar, B.S. Prabhu, “Effects of coupling misalignment on
vibrations of rotating machinery.” In: Journal of Sound and Vibration,
Volume 185, Issue 4, 31 August 1995, Pages 655-671.
[7] H.P.Bloch, F.K.Geitner , Balancing of machinery components. In:
Bloch, H.P.; Geitner ,F.K. Practical Machinery Management for Process
Plants, Gulf Professional Publishing, 2005, Volume 3, Pages 258-366.
[8] C. Kral, T.G.Habetler, R.G. Harley, Detection of mechanical imbalances
of induction machines without spectral analysis of time-domain
signals. In: Industry Applications, IEEE Transactions on , vol.40, no.4,
pp. 1101- 1106, July-Aug. 2004.
[9] J.M. Bossio, G.R. Bossio and C.H. De Angelo, "Angular misalignment
in induction motors with flexible coupling." In: Industrial Electronics,
2009. IECON '09. 35th Annual Conference of IEEE , vol., no., pp.1033-
1038, 3-5 Nov. 2009.
[10] R.R. Obaid, T.G. Habetler and R.M. Tallam, “Detecting load unbalance
and shaft misalignment using stator current in inverter-driven induction
motors.” In: Electric Machines and Drives Conference, 2003.
IEMDC'03. IEEE International, vol.3, pp. 1454- 1458 vol.3, 1-4 June
2003.
[11] R.R. Obaid, T.G. Habetlerand D.J. Gritter, “A simplified technique for
detecting mechanical faults using stator current in small induction
motors.” In: Industry Applications Conference, 2000. Conference
Record of the 2000 IEEE, vol.1, no., pp.479-483 vol.1, 2000.</p>
@article{"International Journal of Mechanical, Industrial and Aerospace Sciences:55796", author = "Úrsula B. Ferraz and Paulo F. Seixas and Webber E. Aguiar", title = "A Simplified Model for Mechanical Loads under Angular Misalignment and Unbalance", abstract = "This paper presents a dynamic model for mechanical
loads of an electric drive, including angular misalignment and
including load unbalance. The misalignment model represents the
effects of the universal joint between the motor and the mechanical
load. Simulation results are presented for an induction motor driving
a mechanical load with angular misalignment for both flexible and
rigid coupling. The models presented are very useful in the study of
mechanical fault detection in induction motors, using mechanical and
electrical signals already available in a drive system, such as speed,
torque and stator currents.
", keywords = "Angular misalignment, fault modeling, unbalance,
universal joint.", volume = "7", number = "7", pages = "1531-7", }
