研究目的
To design and analyze a new type of electrolytic capacitor-less LED driver based on model predictive control strategy.
研究成果
The proposed LED driver is able to absorb the current ripple of twice line frequency, allowing ripple free current to the load without using electrolytic capacitors. All the experimental results of the prototype are consistent with the previous theoretical analysis results, which confirms that the prototype has realized the function of electrolytic capacitor-less LED driver.
研究不足
The study focuses on a specific topology and control strategy, and its applicability to other configurations or under different conditions is not explored. The experimental validation is limited to a 24 V, 3A laboratory prototype.
1：Experimental Design and Method Selection:
The study proposes a new electrolytic capacitor-less LED driver circuit based on model predictive control (MPC) strategy. The topology consists of rectifier bridge, flyback converter and bidirectional cuk converter.
2：Sample Selection and Data Sources:
Simulations and experiments on a 24 V, 3A laboratory prototype are carried out.
3：List of Experimental Equipment and Materials:
Key parameters include input voltage, line frequency, switching frequency of Q1, primary inductance of flyback, inductor in bidirectional cuk converter (L1, L2), and Np:Ns ratio.
4：Experimental Procedures and Operational Workflow:
The operation principles of the proposed topology are analyzed in detail, including the operation modes when input power is greater than output power and when input power is less than output power.
5：Data Analysis Methods:
Model predictive control (MPC) is introduced to improve the control characteristics of the topology. The mathematical model of the circuit which adopts MPC is derived.
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