Title :
A fuzzy controller for extending linearity of overmodulated PWM waveform
Author :
Keskar, Avinash G. ; Asanare, K.L.
Author_Institution :
Dept. of Electron. & Comput. Sci., Visvesvaraya Regional Coll. of Eng., Nagpur, India
Abstract :
A fuzzy controller for generation of pulse width modulated gating signals for a single phase converter is developed. The fuzzy controller is used to establish feasibility of overmodulation with less distortion and an extended range of linear control of output voltage. The sinusoidal pulse width modulation waveform required for switching functions of an inverter has a linear range upto the modulating index of 1.0. An increased distortion is the result of overmodulation. In this paper, using a feedforward cascaded fuzzy controller, the fundamental component of output waveform is increased upto 1.135 p.u. linearly, without appreciably enhancing distortion. The implementation is confirmed through results
Keywords :
PWM power convertors; cascade control; control system synthesis; feedforward; fuzzy control; switching circuits; voltage control; distortion; feedforward cascaded fuzzy controller; fuzzy controller; linear control; linearity extension; modulating index; output voltage control; overmodulated PWM waveform; pulse width modulated gating signals; single phase converter; sinusoidal pulse width modulation waveform; switching functions; Fuzzy control; Linearity; Phase modulation; Pulse generation; Pulse inverters; Pulse width modulation; Pulse width modulation converters; Pulse width modulation inverters; Signal generators; Voltage control;
Conference_Titel :
Industrial Electronics, Control, and Instrumentation, 1996., Proceedings of the 1996 IEEE IECON 22nd International Conference on
Conference_Location :
Taipei
Print_ISBN :
0-7803-2775-6
DOI :
10.1109/IECON.1996.570986
