Adaptive Sensorless PI+Passivity-Based Control of a Boost Converter Supplying an Unknown CPL

This paper presents an adaptive control to stabilize the output voltage of a DC–DC boost converter that feeds unknown constant power load (CPL). The proposed controller employs passivity-based (PBC), which assigns desired system energy compensate for negative impedance may be generated by CPL. A proportional-integral (PI) action maintains passive is added PBC impose damping and enhance disturbance rejection behavior, thus forming PI+PBC control. In addition, includes two estimators, i.e., immersion invariance (I&I), observer (DO), in order estimate CPL supply converter, respectively. These observers become adaptive, sensorless Phase portrait analysis experimental results have validated robustness effectiveness approach. show adequately regulates under variations input simultaneously.