A Novel Control Strategy Applicable for a Dual AC Drive With Common Mechanical Load

The use of a dual electromechanical drive is a well-established and an efficient solution especially when high-power systems are considered. A very important requirement in such systems is the accomplishment of a load balance between the two drives in order to prevent a potential overloading of the one drive in relation to the other one. Additionally, the appearance of mechanical oscillations must be avoided as it will be catastrophic for the mechanical equipment, particularly in the case of mechanical resonance. In this paper, a general analysis of the existing control strategies already used in dual ac drives is being realized first, and a new hybrid control method is proposed based on the need of equal load and power distribution between the two drives. The efficiency of the proposed method is examined for a cement kiln which is a typical system whose large size and imperative uninterrupted operation enforce the use of such a dual drive. A theoretical analysis is being realized developing a corresponding mathematical model and using Matlab/Simulink. Finally, the proposed method is verified using a low-power laboratory system which has been appropriately designed to experimentally simulate a dual drive cement kiln operation.

[1]  D. A. Fenton.  Lateral vibrations, causes and some solutions (in electric drive trains) , 1993, [1993] Record of Conference Papers 35th IEEE Cement Industry Technical.

[2]  Jao-Hwa Kuang,et al.  THEORETICAL ASPECTS OF TORQUE RESPONSES IN SPUR GEARING DUE TO MESH STIFFNESS VARIATION , 2003 .

[3]  Charles B. Mayer.  Torsional Vibration Problems and Analyses of Cement Industry Drives , 1981, IEEE Transactions on Industry Applications.

[4]  Yu Zhang,et al.  PID tuning for improved performance , 1999, IEEE Trans. Control. Syst. Technol..

[5]  Eugene A. Klingshirn,et al.  Harmonic Filters for Six-Phase and Other Multiphase Motors on Voltage Source Inverters , 1985, IEEE Transactions on Industry Applications.

[6]  H.A. Toliyat,et al.  Operating principles of a novel multiphase multimotor vector-controlled drive , 2004, IEEE Transactions on Energy Conversion.

[7]  Syed Nasar,et al.  Torque Vector Control (TVC)-A Class of Fast and Robust Torque-Speed and Position Digital Controllers for Electric Drives , 1988 .

[8]  A. Safacas,et al.  Realization and development of a laboratory simulating system of a girth gear / common shaft ac drive used in cement industry , 2007, 2007 International Aegean Conference on Electrical Machines and Power Electronics.

[9]  M. Sato,et al.  High efficient parallel-connected induction motor speed control with unbalanced load condition using one inverter , 2003, IECON'03. 29th Annual Conference of the IEEE Industrial Electronics Society (IEEE Cat. No.03CH37468).

[10]  Robert M. Taylor,et al.  Torsional Vibration Analysis and Comprehensive Field Testing on a Large Rotary Kiln , 1985, IEEE Transactions on Industry Applications.

[11]  Vernon E. Vrana.  DC Kiln Drive Motors , 1979, IEEE Transactions on Industry Applications.

[12]  Slobodan N. Vukosavic,et al.  Parallel-Connected Multiphase Multidrive Systems With Single Inverter Supply , 2009, IEEE Transactions on Industrial Electronics.

[13]  T.A. Lipo,et al.  A five phase reluctance motor, with high specific torque , 1990, Conference Record of the 1990 IEEE Industry Applications Society Annual Meeting.

[14]  Eric Monmasson,et al.  Control structures for multi-machine multi-converter systems with upstream coupling , 2003, Math. Comput. Simul..

[15]  C. James Li,et al.  Gear fatigue crack prognosis using embedded model, gear dynamic model and fracture mechanics , 2005 .

[16]  B. Francois,et al.  Control implementation of a five-leg AC-AC converter to supply a three-phase induction machine , 2005, IEEE Transactions on Power Electronics.

[17]  Thomas A. Lipo,et al.  Analysis and simulation of five-phase synchronous reluctance machines including third harmonic of airgap MMF , 1998 .

[18]  Hamid A. Toliyat,et al.  A DSP-based vector control of five-phase synchronous reluctance motor , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[19]  M. Holland.  AC DC kilns [drives, cement plant] , 2001, IEEE-IAS/PCA 2001 Cement Industry Technical Conference. Conference Record (Cat. No.01CH37150).

[20]  S. Oda,et al.  Equivalent Misalignment of Gears Due to Deformations of Shafts, Bearings and Gears , 2000 .

[21]  Shahin Hedayati Kia,et al.  Torsional Vibration Assessment Using Induction Machine Electromagnetic Torque Estimation , 2010, IEEE Transactions on Industrial Electronics.

[22]  J Haigh,et al.  Effects of misalignment on load distribution in large face-width helical gears , 2003 .

[23]  Weng Khuen Ho,et al.  Performance and gain and phase margins of well-known PID tuning formulas , 1995, IEEE Trans. Control. Syst. Technol..

[24]  A.N. Safacas,et al.  Girth gear/common shaft AC drive for cement rotary kiln , 2005, Proceedings of the IEEE International Symposium on Industrial Electronics, 2005. ISIE 2005..

[25]  K. Matsuse,et al.  A speed sensorless vector control method of parallel connected dual induction motor fed by a single inverter , 2001, Conference Record of the 2001 IEEE Industry Applications Conference. 36th IAS Annual Meeting (Cat. No.01CH37248).

[26]  Ronald L. Huston,et al.  On Dynamic Loads in Parallel Shaft Transmissions: Part I—Modelling and Analysis , 1988 .

[27]  L.M. Tolbert,et al.  Direct torque control of induction machines using space vector modulation , 1991, Conference Record of the 1991 IEEE Industry Applications Society Annual Meeting.

[28]  Masahiko Itoh.  Suppression of Transient Vibration for Geared Mechanical System with Backlash Using Model-Based Control , 2004 .

[29]  A. Tani,et al.  Performance analysis of a speed sensorless induction motor drive based on a constant switching frequency DTC scheme , 2000, Conference Record of the 2000 IEEE Industry Applications Conference. Thirty-Fifth IAS Annual Meeting and World Conference on Industrial Applications of Electrical Energy (Cat. No.00CH37129).

[30]  Rajendra Singh,et al.  ANALYSIS OF PERIODICALLY VARYING GEAR MESH SYSTEMS WITH COULOMB FRICTION USING FLOQUET THEORY , 2001 .

[31]  M. Jones,et al.  A series-connected two-motor six-phase drive with induction and permanent magnet machines , 2006, IEEE Transactions on Energy Conversion.

[32]  Robert G. Parker,et al.  Mesh Stiffness Variation Instabilities in Two-Stage Gear Systems , 2002 .

[33]  Philippe Delarue,et al.  Generic control method of multileg voltage-source-converters for fast practical implementation , 2003 .

[34]  Thomas A. Lipo,et al.  Dual AC-drive system with a reduced switch count , 2001 .

[35]  K. Matsuse,et al.  Characteristics of speed sensorless vector controlled dual induction motor drive connected in parallel fed by a single inverter , 2004, IEEE Transactions on Industry Applications.

[36]  Ming-Ji Yang,et al.  Global Minimum Torque Ripple Design for Direct Torque Control of Induction Motor Drives , 2010, IEEE Transactions on Industrial Electronics.

[37]  N. Schachter,et al.  Kiln drive application considerations , 2005, Conference Record Cement Industry Technical Conference, 2005..

[38]  Pralay Kumar Das,et al.  An analytical method to calculate misalignment in the journal bearing of a planetary gear system , 1980 .

[39]  Philippe Delarue,et al.  Control implementation of a five-leg voltage-source-inverter supplying two three-phase induction machines , 2003, IEEE International Electric Machines and Drives Conference, 2003. IEMDC'03..

[40]  Ronald L. Huston,et al.  On Dynamic Loads in Parallel Shaft Transmissions: Part II—Parameter Study , 1988 .

[41]  Athanasios N. Safacas,et al.  Upgrade of a kiln drive system for cement industry , 2010, The XIX International Conference on Electrical Machines - ICEM 2010.

[42]  M. Itoh.  Torsional vibration suppression of a twin-drive geared system using model-based control , 2008, 2008 10th IEEE International Workshop on Advanced Motion Control.

[43]  Satoshi Oda,et al.  Equivalent misalignment of gears due to deformation of shafts, bearings and gears - (Model proposal and development of calculation program) , 2003 .

[44]  S. E. Ehinger.  A kiln drive vibration problem and solution , 1993, [1993] Record of Conference Papers 35th IEEE Cement Industry Technical.

[45]  Emil Levi,et al.  Multiphase Electric Machines for Variable-Speed Applications , 2008, IEEE Transactions on Industrial Electronics.

[46]  Bin Wu,et al.  A space vector modulated CSI-based AC drive for multimotor applications , 2001 .

[47]  Drazen Dujic,et al.  A General PWM Method for a (2n + 1) -Leg Inverter Supplying n Three-Phase Machines , 2009, IEEE Trans. Ind. Electron..

[48]  Athanasios N. Safacas,et al.  Dynamic and Vibration Analysis of a Multimotor DC Drive System With Elastic Shafts Driving a Tissue Paper Machine , 2007, IEEE Transactions on Industrial Electronics.

[49]  Toshihiko Noguchi,et al.  A New Quick-Response and High-Efficiency Control Strategy of an Induction Motor , 1986, IEEE Transactions on Industry Applications.

[50]  J. Foster.  Kiln drives: past, present and future , 1996, Proceedings of 38th Cement Industry Technical Conference.

[51]  H.A. Toliyat,et al.  A novel concept of a multiphase, multimotor vector controlled drive system supplied from a single voltage source inverter , 2004, IEEE Transactions on Power Electronics.