Abstract
The positive output elementary Luo (POEL) converter is a fourth-order DC–DC converter having highly non-linear dynamic characteristics. In this paper, a new dynamic output voltage feedback controller is proposed to achieve output voltage regulation of the POEL converter. In contrast to the state-of-the-art current-mode controllers for the high-order boost converters, the proposed control strategy uses only the output voltage state variable for feedback purposes. This eliminates the need for the inductor current sensor to reduce the cost and complexity of implementation. The controller design is accompanied by a strong theoretical foundation and detailed stability analyses to obtain some insight into the controlled system. The performance of the proposed controller is then compared with a multi-loop hysteresis-based sliding-mode controller (SMC) to achieve the output voltage-regulation of the same POEL converter. The schemes are compared concerning ease of implementation, in particular, the number of state variables and current sensors required for implementation and the closed-loop dynamic performance. Experimental results illustrating the features of both controllers in the presence of input reference and load changes are presented.
Highlights
DC–DC converters are widely used in various commercial applications such as electrical vehicles (EVs), hybrid electrical vehicles (HEVs), renewable energy power systems, power supplies for computer periphery and car auxiliary, and so on [1,2,3,4]
An experimental setup of the positive output elementary Luo (POEL) converter system was built to test the effectiveness of the proposed control strategies
The problem of regulating the POEL converter using the least number of variables for feedback wasthe addressed
Summary
DC–DC converters are widely used in various commercial applications such as electrical vehicles (EVs), hybrid electrical vehicles (HEVs), renewable energy power systems, power supplies for computer periphery and car auxiliary, and so on [1,2,3,4]. In [16], proportional-integral (PI) and slidingmode controls are combined to regulate the fourth-order Cuk converter, but without presenting experimental results validating the approach Another approach using the PWM-based double-integral sliding-mode control for the conventional boost converter and other higher-order DC–DC converters has been reported in [17,18,19]. In contrast to the conventional current-mode control, such an output feedback strategy is able to regulate the output voltage of the boost-type DC–DC converters without any inductor current feedback. In contrast to [22], the performance of the proposed controller is compared with a dual-loop hysteresis-based sliding-mode-controller (SMC) to achieve the output voltage-regulation of the same converter parameters. Electronics 2022, 11, 207 the proposed controller is compared with a dual-loop hysteresis-based sliding-mode-con of 15 troller (SMC) to achieve the output voltage-regulation of the same converter parameters.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
