A Three-Vectors-Based Model Predictive Flux Control of Induction Motor Drives

doi:10.11985/2017.03.001

Abstract

Abstract:

Model predictive flux control (MPFC) has attracted wide attention, because it had been proposed to cope with the tedious weighting factor tuning work required in conventional model predictive torque control (MPTC). However, similar to MPTC, MPFC presents high torque and current ripples if only one voltage vector is applied during each control period. To improve the steady state performance of MPFC, various two-vectors-based schemes can be found in existing literature. Although better performance can be expected if three vectors are selected during one control period, the complexity would also be increased significantly, which makes its practical application difficult. To address this problem, a simple yet very effective three-vectors-based MPFC is proposed in this paper. To decrease the effect of inverter nonlinearity on three-vectors-based MPFC, this paper also proposed an improved three-vectors-based MPFC based on the theory of volt-second balance. To show superior performance of three-vectors-based MPFC, MPFC based on space vector pulse width modulation is introduced as a comparison. Finally, the effectiveness of the novel three-vectors-based MPFC is verified by the simulation and experiment testes. A detailed performance comparison for the three control methods with the same switching frequency is also presented.

Key words: Induction motor, model predictive flux control, model predictive torque control, weighting factor

CLC Number:

TM351

Yongchang Zhang,Bo Xia,Haitao Yang. A Three-Vectors-Based Model Predictive Flux Control of Induction Motor Drives[J]. Journal of Electrical Engineering, 2017, 12(3): 1-9.

Figures/Tables 12

Fig.1

Fig.2

Fig.3

Tab

Fig.4

Fig.5

Fig.6

Fig.7

Fig.8

Fig.9

Fig.10

Fig.11

References 28

[1]	Casadei D, Profumo F, Serra G , et al. FOC and DTC: two viable schemes for induction motors torque control[J]. IEEE Transactions on Power Electronics, 2002,17(5):779-787.
[2]	Zhang Y, Zhu J, Zhao Z , et al. An improved direct torque control for three-level inverter-fed induction motor sensorless drive[J]. IEEE Transactions on Power Electronics, 2012,27(3):1502-1513.
[3]	Buja G S, Kazmierkowski M P . Direct torque control of PWM inverter-fed AC motors - a survey[J]. IEEE Transactions on Industrial Electronics, 2004,51(4):744-757.
[4]	Beerten J, Verveckken J, Driesen J . Predictive direct torque control for flux and torque ripple reduction[J]. IEEE Transactions on Industrial Electronics, 2010,57(1):404-412.
[5]	Zhang Y, Zhu J . A novel duty cycle control strategy to reduce both torque and flux ripples for dtc of permanent magnet synchronous motor drives with switching frequency reduction[J]. IEEE Transactions on Power Electronics, 2011,26(10):3055-3067.
[6]	王成元, 夏加宽, 孙宜标 . 现代电机控制技术[M]. 北京: 机械工业出版社, 2009.
[7]	Holtz J, Stadtfeld S. A predictive controller for the stator current vector of ac machines fed from a switched voltage source[C]. IEEE International Power Electronics Conference, Tokyo, 1983: 1665-1675.
[8]	Cortes P, Kazmierkowski M, Kennel R , et al. Predictive control in power electronics and drives[J]. IEEE Transactions on Industrial Electronics, 2008,55(12):4312-4324.
[9]	Geyer T, Papafotiou G, Morari M . Model predictive direct torque control; part I: concept, algorithm, and analysis[J]. IEEE Transactions on Industrial Electronics, 2009,56(6):1894-1905.
[10]	Mitja Nemec, David Nedeljkovi´c, Vanja Ambrožic . Predictive torque control of induction machines using immediate flux control[J]. IEEE Transactions on Industrial Electronics, 2007,54(4):2009-2017.
[11]	Zhang Y, Yang H, Xia B . Model predictive control of induction motor drives: flux control versus torque control[J]. IEEE Transactions on Industry Applications, 2016,99:1-11.
[12]	Zhang Y, Yang H . Two-vector-based model predictive torque control without weighting factors for induction motor drives[J]. IEEE Transactions on Power Electronics, 2016,31(2):1381-1390.
[13]	Zhang Y, Zhu J . Direct torque control of permanent magnet synchronous motor with reduced torque ripple and commutation frequency[J]. IEEE Transactions on Power Electronics, 2011,26(1):235-248.
[14]	Zhang Yongchang, Yang Haitao . Model predictive torque control of induction motor drives with optimal duty cycle control[J]. IEEE Transactions on Power Electronics, 2014,29(12):6593-6603.
[15]	Zhang Y, Yang H . Model predictive flux control of induction motor drives with switching instant optimization[J]. IEEE Transactions on Energy Conversion, 2015,30(3):1113-1122.
[16]	Holtz J . The representation of AC machine dynamics by complex signal flow graphs[J]. IEEE Transactions on Industrial Electronics, 1995,42(3):263-271.
[17]	Zhang Y, Yang H. Torque ripple reduction of model predictive torque control of induction motor drives[C]. IEEE in Energy Conversion Congress and Exposition, 2013: 1176-1183.
[18]	Li Q, Wang N, Yi D. Numerical analysis[M]. Beijing: Tsinghua University Press, 2001.
[19]	Zhang Y, Zhu J, Zhao Z , et al. An improved direct torque control for three-level inverter-fed induction motor sensorless drive[J]. IEEE Transactions on Power Electronics, 2012,27(3):1502-1513.
[20]	Zhang Yongchang, Zhao Zhengming. Speed sensorless control for three-level inverter-fed induction motors using an extended luenberger observer [C]. IEEE in Vehicle Power and Propulsion Conference, 2008: 1-5.
[21]	Rojas C, Rodriguez J, Villarroel F , et al. Predictive torque and flux control without weighting factors[J]. IEEE Transactions on Industrial Electronics, 2013,60(2):681-690.
[22]	张永昌, 杨海涛 . 感应电机模型预测磁链控制[J]. 中国电机工程学报, 2015,35(3):719-726.
	Zhang Yongchang, Yang Haitao . Model predictive flux control for induction motor drives[J]. Proceedings of the CSEE, 2015,35(3):719-726.
[23]	Cortés P, Kouro S, La Rocca B, et al. Guidelines for weighting factors design in model predictive control of power converters and drives[C]. IEEE International Conference on Industrial Technology, Gippsland, 2009: 1-7.
[24]	Miranda H, Cortes P, Yuz J , et al. Predictive torque control of induction machines based on state-space models[J]. IEEE Transactions on Industrial Electronics, 2009,56(6):1916-1924.
[25]	Cortes P, Rodriguez J, Silva C , et al. Delay compensa-tion in model predictive current control of a three-phase inverter[J]. IEEE Transactions on Industrial Electronics, 2012,59(2):1323-1325.
[26]	Karamanakos P, Stolze P, Kennel R , et al. Variable switching point predictive torque cont rol of induction machines[J]. IEEE Journal of Emerging and Selected Topics in Power Electronics, 2014,2(2):285-295.
[27]	Rodriguez J, Kennel R M, Espinoza J R , et al. High- performance control strategies for electrical drives: an experimental assessment[J]. IEEE Transactions on Industrial Electronics, 2012,59(2):812-820.
[28]	Wang F, Zhang Z, Alireza Davari S , et al. An encoderless predicti ve torque control for an induction machine with a revised prediction model and efosmo[J]. IEEE Transactions on Industrial Electronics, 2014,61(12):6635-6644.

参数	数值
U_dc/V	540
P_n/kW	2.2
U_n/V	380
f_n/Hz	50
N_p	2
T_n/N·m	14
R_s/Ω	3.126
R_r/Ω	1.879
L_m/H	0.221
L_s/H	0.23
L_r/H	0.23
Ψ_s/Wb	0.91