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This paper shows that classical sliding mode theory fails to correctly predict the output impedance of the highly useful sliding mode PID compensated buck converter. The reason for this is identified as the assumption of the sliding variable being held at zero during sliding mode, effectively modeling the hysteretic comparator as an infinite gain. Correct prediction of output impedance is shown to...
This paper presents a theoretical and experimental comparison of the standard PWM/PID voltage-mode control method for single-phase buck converters with two high-performance self-oscillating (a.k.a. sliding mode) control methods. The application considered is ultra-fast tracking power supplies (UFTPSs) for RF power amplifiers, where the switching converter needs to track a varying reference voltage...
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