The matrix converter connects the three-phase power supply with the three-phase load directly through a switching matrix composed of four-quadrant switches. In order to evaluate and improve the performance of matrix converter, some experimental tests in typical abnormal conditions have been carried out. The basic topology of Matrix Converter (MC) consists of a three-phase MC consists of nine bidirectional switches, which allow pulse width modulation (PWM) control of input currents and output voltages. The maximum line–line output voltage of the matrix converter must not be greater than the minimum line–line input voltage. An often-cited drawback to the matrix converter is the theoretical voltage conversion limit of 0. 86. When high dynamic performance and precision control are required for an induction motor in a wide speed range, the speed must normally be measured. In contrast, in the case of medium and low performance applications, sensorless control without measuring the motor speed is desirable as they tend to reduce system reliability when working in hostile environments. This also describes the working principle, space vector modulation strategy of matrix converter, characteristics of fuzzy control, and the basic principle of adaptive fuzzy PID. The use of fuzzy makes the control of matrix converter more reasonable. Combining fuzzy control and closed-loop control can effectively improve the input and output waveforms of matrix converter.

1. M. Venturini, "A new sine wave in sine wave out conversion technique which eliminates reactive elements," in Proc. Powercon 7, 1980, pp. E3-1–E3-15.
2. Hidenori Hara, Eiji Yamamoto, Jun-Koo Kang and Tsuneo Kume, Improvement of Output Voltage Control Performance for Low-Speed Operation of Matrix Converter, IEEE Transactions on power electronics, vol. 20, no. 6, november 2005.
3. P. W. Wheeler and J. Rodriguez et al. , "Matrix converters: a technology review," IEEE Trans. Ind. Electron. , vol. 49, no. 2, pp. 276–288, Apr. 2002.
4. P. W. Wheeler, P. Zanchetta, J. C. Clare, L. Empringham, M. Bland and D. Katsis, A Utility Power Supply Based on a Four-Output Leg Matrix Converter, ieee transactions on industry applications, vol. 44, no. 1, january/february 2008.
5. P. W. Wheeler, J. Rodriguez, J. C. Clare, L. Empringham, and A. Weinstein, "Matrix converters: A technology review," IEEE Trans. Ind. Electron. , vol. 49, no. 2, pp. 276–288, Apr. 2002.
6. Patrick W. Wheeler, Jon C. Clare, Maurice Apap, and Keith J. Bradley, Harmonic Loss due to Operation of Induction Machines from Matrix Converters, IEEE Transactions On Industrial Electronics, Vol. 55, No. 2, February 2008.
7. Kyo-Beum Lee, Frede Blaabjergand Tae-Woong Yoon, Speed-Sensorless DTC-SVM for Matrix Converter Drives With Simple Nonlinearity Compensation, IEEE Transactions On Industry Applications, Vol. 43, No. 6, November/December 2007.
8. Kyo-Beum Lee and Frede Blaabjerg, Sensorless DTC-SVM for Induction Motor Driven by a Matrix Converter Using a Parameter Estimation Strategy, IEEE Transactions On Industrial Electronics, Vol. 55, No. 2, February 2008.
9. K. B. Lee and F. Blaabjerg, "Improved direct torque control for sensorless matrix converter drives with constant switching frequency and torque ripple reduction," Int. J. Control, Autom. Syst. , vol. 4, no. 1, pp. 113–123, Feb. 2006.
10. D. Swierczynski, M. K. Kazmierkowski, and F. Blaabjerg, "DSP based direct torque control of permanent magnet synchronous motor (PMSM) using space vector modulation (DTC-SVM)," in Proc. IEEE ISIE, 2002, pp. 723–727.
11. L. Tang, L. Zhong, M. F. Rahman, and Y. Hu, "A novel direct torque controlled interior permanent magnet synchronous machine drive with low ripple in flux and torque and fixed switching frequency," IEEE Trans. Power Electron. , vol. 19, no. 2, pp. 346–354, Mar. 2004.
12. K. B. Lee and F. Blaabjerg, "Reduced-order extended luenberger observer based sensorless vector control driven by matrix converter with nonlinearity compensation," IEEE Trans. Ind. Electron. , vol. 53, no. 1, pp. 66–75, Feb. 2006.
13. K. B. Lee, J. H. Song, I. Choy, and J. Y. Yoo, "Torque ripple reduction in DTC of induction motor driven by three-level inverter with low switching frequency," IEEE Trans. Power Electron. , vol. 17, no. 2, pp. 255–264, Mar. 2002.
14. Yougui Guo, Shouyi Yu and Jianlin Zhu, Application of Adaptive Fuzzy PID Controller for Matrix Converter, IEEE International Conference on "Computer as a Tool" Warsaw, September 9-12, 2007.
15. Liu Jinkun. "Advanced PID control and its MATLAB simulation," Publishing House Of Electronics Industry. 2003.

Matrix Converter Induction Motor Drive Abnormal Conditions Space Vector Modulation Fuzzy Pid Controller