Title :
High-efficiency ripple-free power converter for nuclear magnetic resonance
Author :
Silva, J. Fernando ; Galhardo, A. ; Palma, Joiio
Abstract :
A new power converter topology and control scheme, enabling a ripple free output with high efficiency, is presented. Feedback controllers for the proposed topology are designed taking into account nonideal parameters. Experimental results, presenting almost no ripple, fast dynamics, almost no overshoot, and good tracking performance, demonstrate the merits and justify the cost of the extra amplifier needed in the new converter concept
Keywords :
PWM power convertors; control system synthesis; electric current control; feedback; harmonic distortion; harmonics suppression; nuclear magnetic resonance; power amplifiers; power conversion harmonics; two-term control; variable structure systems; amplifier; control performance; control scheme; feedback controller design; nuclear magnetic resonance; ripple free output; ripple-free power converter topology; tracking performance; Circuits; Nuclear magnetic resonance; Power amplifiers; Power semiconductor switches; Power supplies; Pulse width modulation; Pulse width modulation converters; Regulators; Sliding mode control; Voltage;
Conference_Titel :
Power Electronics Specialists Conference, 2000. PESC 00. 2000 IEEE 31st Annual
Conference_Location :
Galway
Print_ISBN :
0-7803-5692-6
DOI :
10.1109/PESC.2000.878884
