【摘要】 本文提出了一种适用于CCMflyback高频链逆变器的控制策略。该控制策略通过一个箝位电路来实现,一方面可减小flyback电路由变压器漏感引起的电压尖峰问题,另一方面也可使flyback即使运作于CCM模式也能同时获得较好的动静态性能;同时通过该箝位电路还可实现flyback主管的零电压开通。此外,还提出了一种两路交替复用的拓扑来减小电流应力及改善由此引起的一系列问题。本文详细介绍了电路的工作原理、控制模型及控制策略,并通过一个500VA(从12V的直流变换成220Vac/50Hz的交流输出)的原型机来验证所提出的方案。更多还原

【Abstract】 Continuous current mode high frequency link fly-back inverter design with bi-directional power flow is presented in this paper. The proposed active clamp circuit with dual-purpose is used to both solve voltage stress issue and achieve good dynamic response. Furthermore, the proposed interleaving topology is used to reduce overall size and improve power rating. Detailed operation modes, model derivation and control scheme are introduced. These proposals are verified by experimental results: 500VA prototype (from 12Vdc to 220Vac/50Hz) with 60kHz switching frequency.更多还原