ACRVEM
Active control of rotor vibrations in electrical machines
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Keywords: electrical machines, rotor dynamics, vibrations, active control
The development of power electronics has brought variable-speed electric drives to compressor and pump applications. Significant energy savings obtained when a pump or compressor can be run at its optimal rotation speed. From the mechanical perspective, a variable speed drive is a challenge. The frequencies of the magnetic and unbalance forces change with the varied rotation speed, and mechanical vibrations are easily excited. The natural frequencies of flexural rotor vibrations, also called critical speeds, are one source of vibration problems. If a present-day electrical motor is continuously run at a critical speed, the vibration amplitude reaches an unacceptably high level. The operation at a critical speed has to be restricted, and this brings forbidden regions to the speed-control range of the application.
The aim is to develop an intelligent control of the flexural rotor vibrations, which will allow supercritical cage induction motors to be run within their speed control ranges without restrictions. The idea is to compensate the mass unbalance of the rotor with a magnetic force. This is achieved by slightly modifying the air-gap field of the machine with additional currents inserted in the stator slots. The stator can either be equipped with an additional winding supplied from a small frequency converter or the parallel branches of the stator winding can be utilised. A small supercritical 30 kW cage induction motor is designed for validation tests
Publications
- Ali Altowati, Kai Zenger and Heikki Koivo,
"Modeling and control design of paralleled DC-DC switching converters,"
in International Conference on Communication, Computer & Power - Proceedings, Sultan Qaboos University, Oman: IEEE, 2009, 6 pp. - Antti Laiho, Sinervo Anssi, Juha Orivuori, Kari Tammi, Antero Arkkio and Kai Zenger,
"Attenuation of harmonic rotor vibration in a cage rotor induction machine by a self-bearing force actuator,"
IEEE Transactions on Magnetics, Vol. 45, no. 12, 5388–5398, 2009.
Electronic publication - Antti Laiho, Kari Tammi : Burakov, Andrej, Antero Arkkio and Kai Zenger,
"A built-in force actuator for active control of lateral rotor vibration in cage induction electrical machines,"
Journal of Sound and Vibration, Vol. 320, no. 3, 496-515, 2009.
Electronic publication - Laiho Antti, Kari Tammi, Juha Orivuori, Anssi Sinervo, Kai Zenger and Antero Arkkio,
"Electromechanical interaction in eccentric-rotor cage induction machine equipped with a self-bearing force actuator,"
Journal of System Design and Dynamics, Vol. 3, no. 4, 519-529, 2009. - Juha Orivuori, Laiho Antti, Anssi Sinervo, Kai Zenger and Antero Arkkio,
"Suppression of rotor vibrations of an electric machine at the critical speed by optimal state feedback controller,"
in European Control Conference 2009 - PROCEEDINGS, Budapest, Hungary: EUCA; IFAC; IEEE, 2009, pp. 4344-4349. - Juha Orivuori, Kai Zenger and Anssi Sinervo,
"Active control of rotor vibrations by advanced control methods,"
in ICSV16 Proceedings - Recent Developments in Acoustics, Noice and Vibration, Marek Pawelczyk and Dariusz Bismor (eds.), Krakow, Poland: IIAV, 2009, 8 pp. - Juha Orivuori, Kai Zenger and Timo Virtanen,
"Periodisten häiriöiden aktiivivaimennuksen menetelmät,"
in Automaatio XVIII 2009 - Proceedings, Matti Ketonen (ed.), Helsinki, Finland: Suomen Automaatioseura ry, 2009, 6 s. - Kari Tammi, Antti Laiho, Erkki Lantto, Kai Zenger and Antero Arkkio,
"On convergence problems of adaptive fir filter with lms algorithm,"
in ICSV16 Proceedings - Recent Developments in Acoustics, Noice and Vibration, Marek Pawelczyk and Dariusz Bismor (eds.), Krakow, Poland: IIAV, 2009, 8 pp. - Antti Laiho, Kari Tammi, Juha Orivuori, Anssi Sinervo, Kai Zenger and Antero Arkkio,
"Electromechanical interaction in eccentric-rotor cage induction machine equipped with a self-bearing force actuator,"
in ISMB 11 Proceedings, Kenzo Nonami, Takeshi Mizuno and Mochimitsu Komori (eds.), Nara, Japan: 2008, 7 pp. - Antti Laiho, Kari Tammi, Kai Zenger and Antero Arkkio,
"A model-based flexural rotor vibration control in cage induction electrical machines by a built-in force actuator,"
Electrical Engineering (Archiv für Elektrotechnik), Vol. 90, no. 6, pp. 407-423, 2008.
Electronic publication - Juha Orivuori, Antti Laiho and Anssi Sinervo,
"Active control of radial rotor vibrations in electric machines – identification, modeling and control design,"
in Nordic Workshop on Power and Industrial Electronics (NORPIE/2008), Helsinki University of Technology, Faculty of Electronics, Communications and Automation, 2008, 8 pp.
Electronic publication - Kai Zenger, Anssi Sinervo : Orivuori, Juha, Antti Laiho and Kari Tammi,
"Parallel disturbance force compensator for electrical machines,"
in Proceedings of the 17th IFAC World Congress, July 6-11, 2008, Seoul, Korea, Myung Jin Chung, Pradeep Misra and Hyungbo Shim (eds.), Seoul, Korea: IFAC, 2008, 6 pp. - Jozef Hrbček,
Active control of rotor vibration by model predictive control - A simulation study,
Espoo, Finland: Helsinki University of Technology, Control Engineering Laboratory, 2007. (Helsinki University of Technology, Control Engineering Laboratory, Report 153).
Electronic publication - Antti Laiho, Andrej Burakov, Kari Tammi, Kai Zenger and Antero Arkkio,
"Active control of radial rotor vibrations in cage induction electrical machines by a built-in force actuator,"
in Proceedings of the ASME, ASME, 2007. - Juha Orivuori, Ali Altowati, Jozef Hrbcek, Kai Zenger, Antero Arkkio, Antti Laiho and Kari Tammi,
"Physical modeling, analysis and active model-based control of rotor vibrations in electric motors,"
in 14th Nordic Process Control Workshop, Sirkka-Liisa Jämsä-Jounela (ed.), Espoo, Finland: Nordic Working Group on Process Control, 2007, pp. 102-107. - Kari Tammi,
Active control of radial rotor vibrations - Identification, feedback, feedforward, and repetitive control methods,
Doctoral dissertation, Department of Automation and Systems Technology, Helsinki University of Technology, Espoo, Finland, 2007. (VTT Publications, 634).
Electronic publication - Kai Zenger, Juha Orivuori, Antti Laiho, Kari Tammi, Andrej Burakov and Antero Arkkio,
"Sähkömoottorin roottorivärähtelyjen aktiivivaimennus,"
in Automaatio 07, Olli Ventä (toim.), Helsinki: Suomen Automaatioseura ry, 2007, 6 pp. - Kai Zenger, Juha Orivuori, Anssi Sinervo, Ali Altowati, Jozef Hrbcek, Antero Arkkio, Antti Laiho and Kari Tammi,
"Simulation as a means to test advanced control algorithms in suppressing rotor vibrations in electric machines,"
in Proceedings of the 6th EUROSIM Congress on Modelling and Simulation, Vol. 2: Full Papers (CD), Zupan#char#269, Borut ič#, Rihard Karba and Sašo Blažič (eds.), Ljubljana, Slovenia: EUROSIM, 2007, 7 pp.