Speed Estimation of Induction Motor at Low and Zero Speed using High Frequency Signal Injection for Rotor Slot Harmonics Detection S. Damkhi, M.S. Nait Said and N. Nait Said   2018/04/20

Abstract

Rotor position estimation based on high frequency signal injection method represents the interesting way to provide the high performances of the AC drives sensorless controlled at low or near zero speed range. So, this method requires the existence of saliencies inside the IM particularly the presence of the slots where their design constitutes the main advantageous to exploit its effect for rotor speed monitoring. First, the present paper exposes a model of the induction machine including slotting effects which it can be exploited in order to extract the harmonic saliency created by rotor slotting. Second, the high frequency signal injection method is used in order to allow tracking the characteristic harmonic saliency due to rotor slotting from which the rotor position and speed may be estimated. A High frequency voltage signal injection creates a high frequency current modulated by the saliencies presented inside the machine. To extract information about rotor position, the resulting stator current treads to heterodyning process to eliminate the disturbance components and subsequently the rotor position may be extracted by a closed-loop observer. Simulation results are shown in order to verify the validity of the proposal and to confirm the effectiveness of estimation method at zero frequency.

Authors and affiliations

S. Damkhi1, M.S. Nait Said2 and N. Nait Said1
1. Department of Electrical Engineering, L.S.P.I.E., Batna University, Batna (Algeria)
2. Faculty of Technology University of Batna 1, Banta (Algeria)

Key words

Induction Machine (IM), High Frequency (HF), Closed Loop Observer, Saliencies, Sensorless Control.

References

[1] F. BRIZ and M. W. Degner,"A Review of High Frequency Methods",IEEE Industrial electronics magazine ,May/June 2011, pp. 24-36.
[2] T.M. Wolbank, M.K. Metwally, "Separation of Saliency Components for Speed Sensorless Detection of Flux and Rotor Position of Induction Machines", Proceedings of the 2008 International Conference on Electrical Machines, 978- 1-4244-1736.
[3] S.Nandi, "Modeling of induction machines including stator and rotor slot effects", IEEE Trans,Ind,Appl,vol.40 ,n.4,July./Aug.2004,pp.1058- 1065.
[4] S.Nandi, "Slot permeance effects on rotor slot harmonics in induction machines", IEEE Electric Machines and Drives Conference 2003, IEMDC'03,vol.3,1-4June 2003,pp.1633- 1639.
[5] M.W.Degner and R.D.Lorenz,"Position estimation in induction machines utilizing rotor bar slot harmonics and carrier frequency signal injection",IEEE Trans, ,Ind,Appl.,vol.36,no.3,May/Jun. 2000.pp. 736-742.
[6] F.Briz, M.W.Degner,P.Garcia,R.D.Lorenz, "Comparison of saliency-based sensorless control techniques for ACmachines",IEEETrans,Ind,Appl.,vol.40,no.4,Jul./Aug2004.pp. 1107-1115.
[7] Q.Gao, G.M.Asher, M.Summer, "Sensorless Position and Speed Control of induction Motors Using High Frequency Injection Without Offline Percommissioning",IEEE Trans,Ind,Appl.,vol.54,Oct. 2007.pp. 2474-2481.
[8] L. A. S. Ribeiro ,M. W. Degner, F. Briz, R.D. Lorenz, "Comparison of carrier signal voltage and current injection for the estimation of flux angle or rotor position", Proceeding of IEEE-IAS 1998 Annual Meeting, vol. 1, Oct. 1998. pp. 452- 459.
[9] O.Keysan and H.B.Ertan,"Higher Order Rotor slot Harmonics for Rotor Speed & Position Estimation", Optimization of Electrical and Electronic Equipment,Brasov,2010.
[10] R.Blasco-Gimennez,G.M.Asher and M.Sumner ,K.J.Bradley, "Performance of FFT-rotor slot harmonic speed detector for sensorless induction motor drives ", IEE Proc-ElectrpowerAppl., vol.143,no.3, May 1996.PP. 258-260.
[11] M.Cirrincione, M.Pucci, G.Cirrincione, A.Miraoui, "Space-Vector State Model of Induction Machines Including Rotor Slotting Effects: Toward a New Category of Observers",IEEETrans,Ind,Appl.,vol.44,n.6,Nov./Dec. 2008.
[12] F.Briz, W.Degner, P.Garcia,and J.M.Guerrero, "Rotor position estimation of AC machines using the zero-sequence carrier-signalvoltage",IEEE Trans, Ind,Appl.,vol.41,n.6,Nov./Dec.2005.pp. 1637-1646.
[13] F.Briz, M.W.Degner, P.Garcia and A.B.Diez, "Rotor and Flux Position Estimation in Delta-Connected AC Machines Using the Zero-Sequence Carrier-Signal Current", IEEE Trans, Ind,Appl., vol.42, n.2,March./April. 2006.pp. 495-503.
[14] S.Nandi,H.Toliyat,"NovelFrequency-Domain-Based Technique to Detect Stator Interturn Faults in Induction Machines Using Stator-Induced Voltages After Switch-Off ",IEEETrans,Ind,Appl.,vol.38,n.1,January/February2002.pp.101-109.
[15] C.S.Staines,G.M.Asher, M.Sumner, "Rotor-position Estimation for Induction Machines at Zero and Low Frequency Utilizing Zero-Sequence Currents",IEEE Trans,Ind,Appl., vol. 42, n. 1, 2006.pp. 105-112.
[16] C.Caruana, G.M.Asher, K.J.Bradley ,M.Woolfon,"Flux Position Estimation in Cage Induction Machines Using Synchronous HF Injection and Kalman Filtering", IEEETrans,Ind,Appl., vol. 39, n. 5, 2003.pp. 1372-1378.