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Commenced in January 2007 Frequency: Monthly Edition: International Publications Count: 29396


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6698
Precision Control of Single-Phase PWM Inverter Using M68HC11E Microcontroller
Abstract:
Induction motors are being used in greater numbers throughout a wide variety of industrial and commercial applications because it provides many benefits and reliable device to convert the electrical energy into mechanical motion. In some application it-s desired to control the speed of the induction motor. Because of the physics of the induction motor the preferred method of controlling its speed is to vary the frequency of the AC voltage driving the motor. In recent years, with the microcontroller incorporated into an appliance it becomes possible to use it to generate the variable frequency AC voltage to control the speed of the induction motor. This study investigates the microcontroller based variable frequency power inverter. the microcontroller is provide the variable frequency pulse width modulation (PWM) signal that control the applied voltage on the gate drive, which is provides the required PWM frequency with less harmonics at the output of the power inverter. The fully controlled bridge voltage source inverter has been implemented with semiconductors power devices isolated gate bipolar transistor (IGBT), and the PWM technique has been employed in this inverter to supply the motor with AC voltage. The proposed drive system for three & single phase power inverter is simulated using Matlab/Simulink. The Matlab Simulation Results for the proposed system were achieved with different SPWM. From the result a stable variable frequency inverter over wide range has been obtained and a good agreement has been found between the simulation and hardware of a microcontroller based single phase inverter.
Digital Object Identifier (DOI):

References:

[1] K. Low, "A DSP-Based Variable AC Power Source", Instrumentation and Measurement, IEEE Transactions, Vol. 47, NO. 4, 1998, pp: 992- 996.
[2] S. K. Chung, H. B. Shin and H. W. Lee, "Precision Control of Single- Phase PWM Inverter Using PLL Compensation", in Proceedings of the 2005 Electric Power Applications, IEE, Vol. 152, pp. 429 - 436.
[3] L. Rimifriu, M. Lucanu, C, Aghion, O. Ursaru, "Control With Microcontroller For PWM Single-Phase Inverter," IEEE, "Gh. Asachi" Technical University of Iasi, Faculty of Electronics and Telecommunications, Bd. Carol I, no. 11, Iasi, 700537 Romania. 2003.
[4] W. Bacharowski, "Microcontrollers in Variable Frequency Inverters", WESCON95, Maintain View, CA, Conference Record, Microelectronics Communications Technology Producing Quality Products Mobile and Portable Power Emerging Technologies, 1995, pp. 13-15.
[5] A. S. Ba-thunya, R.Khopkar, K. Wei and H. A. Toliyat, "Single Phase Induction Motor Drives-A Literature Survey," Electric Machines and Drives Conference. IEMDC 2001, College Statias, Texas, IEEE International 2001, pp. 911 - 916.
[6] M. Chomat and T. A. Lipo, "Adjustable-Speed Single-Phase IM Drive with Reduced Number of Switches," Industry Applications Conference, Conference Record of the IEEE, Chicago, USA, 2003, Vol. 39, pp. 819 - 825.
[7] J. Yao, "Single Phase Induction Motor Adjustable Speed Control Using DSP and Microcontroller," Course Project for ECE734 Fall Semester at UW-¬Madison, 2000, pp. 1-7.
[8] S. M. Bashi, I. Aris and S.H. Hamad "Development of Single Phase Induction Motor Adjustable Speed Control Using M68HC11E-9 Microcontroller," Journal of Applied Sciences 5 (2), pp. 249-252.
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