Browsing by Author "Chen, Tien-Hung"

Now showing 1 - 3 of 3

A Simple Control Strategy Extending Intrinsic Current Balancing Characteristics to Achieve a Full Operating Range for Interleaved Voltage-Doubler Boost DC-DC Converters
(2020-01-01)
Li, Chung-Yi
;
Chen, Tien-Hung
;
Chen, Hung-Chi
;
電機工程學系
;
電控工程研究所
The interleaved voltage-doubler boost converter strategy exhibits a very good performance, namely, in a low conduction loss, an acceptable switch stress, a fast transient response, and a very high power density. However, the bottleneck for application in the interleaved topology lies in the limit of operating duty ratio. In this article, an intrinsic current-balancing control method to achieve full operating range in duty ratio is proposed, and it can be easily implemented by including a voltage limiter to the conventional control configuration. With this novel design, both voltage-doubler and the current-balancing characteristics can be achieved within full range in duty cycle without any current sensor. The proposed method is implemented in a field programmable gate array chip. The provided simulations and experimental results validate the proposed method.
Active Capacitor Voltage Balancing Control for Three-Level Flying Capacitor Boost Converter Based on Average-Behavior Circuit Model
(2019-03-01)
Chen, Hung-Chi
;
Lu, Che-Yu
;
Lien, Wei-Hsiang
;
Chen, Tien-Hung
;
電機工程學系
This paper proposes an active voltage balancing control strategy for the three-level flying capacitor boost converter (FCBC). The average-behavior circuit model for the three-level FCBC is studied, and then, the relationship of control to output signals is presented to analyze the coupling effects between the capacitor voltage balancing and the output voltage regulation. In addition, classical proportional and proportional-integral controllers are used for the voltage balancing control loop and the output voltage regulating control loop, respectively. Finally, the proposed control algorithm is implemented in a commercial field programmable gate array platform. Some simulation and experimental results demonstrate that the proposed active control strategy is able to achieve the desired effects for the steady-state and transient responses.
Modeling and Control for Interleaved Voltage-Doubler Boost Converter
(2018-01-01)
Chen, Hung-Chi
;
Chen, Tien-Hung
;
Li, Chung-Yi
;
電機工程學系
;
電控工程研究所
In this paper, a new control method for a interleaved voltage-doubler boost converter is proposed to extend the operating range of duty ratio. Firstly, the analysis of the current-sharing mechanism is presented. Then, the averaging method is adopted to construct an average-behavior circuit model. After that, the modulation signal for current-sharing is particularly designed by amp-second balance. Besides, the average state-space equation of the voltage-doubler can be obtained. The open-loop transfer function can be derived from the small-signal analysis, and the proportional-integral (PI-type) controller parameters can be selected by Bode plots. All the algorithms are implemented in a Field Programmable Gate Array (FPGA) chip. The simulation and experimental results validate the inductor current-sharing capability of the proposed method.