Design of Active Clamp Grid-Connected Micro-Inverter Based on Single-Ended Flyback Topology

doi:10.11985/2016.04.004

Abstract

Abstract:

In this paper, considering the flyback grid-conneted micro-inverter, the structure and principle of the single-phase grid-conneted micro-inverter are described firstly, and the working principle of flyback converter is analyzed in detail when the active clamp circuit is joined. Secondly, the control system modeling of flyback micro-inverter is analyzed and the parameters of the main power circuitare are designed. Finally, through this prototype verify the active clamp circuit not only the voltage spikes are effeetively limited when the main switch of the flyback is turn-off and achieve the zero voltage switch (ZVS), but also does not affect the function of power generation.

Key words: Flyback micro-inverter, the active clamp circuit, parameters design, zero voltage switch

CLC Number:

TM464

Zhao Jian,Wang Haining,Zhang Xiaoan. Design of Active Clamp Grid-Connected Micro-Inverter Based on Single-Ended Flyback Topology[J]. Journal of Electrical Engineering, 2016, 11(4): 22-28.

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主要实验参数	参数值
开关频率f_s/kHz	100
变压器匝比N	7
光伏电池输入电压/V	25~45
激磁电感L_p/μH	55
漏感L_k/μH	0.6
钳位电容C_c/μF	2
电网频率f_g/Hz	50
电网电压U_g/V	110