A zero current switching (ZCS) buck converter is presented. Due to ZCS, the switching losses of the converter are minimized. The converter passes through four modes. The modes of operation are explained by mathematical description and with the help of the phasor u-Zi diagram. The dimensioning of the devices is explained.

2021年4月7日 · 研究了一种新型ZCS PWM Buck变换器，分析了该变换器的工作原理。 它具有下述优点：①结构简单，所用器件数量少；②所有的有源开关器件都是ZCS，所有的无源开关器件都是ZVS。

（3）Buck 型 ZCS QRC 变换器的推广. 将零电流谐振开关应用到第 2 章讨论的各种直流变换器中，可以得到一族零电流开关准谐振变换器（ZCS QRCs），这些变换器的基本工作模式是相同的。

A zero voltage switched Buck regulator will be used to develop the design equations for the various voltages, currents and time intervals associated with each of the conversion periods which occur during one complete switching cycle. The circuit schematic, compo-nent references, and relevant polarities are shown in Fig. 4.

The designed converter uses two switches i.e. main switch and auxiliary switch which are operated in Zero Voltage Switching (ZVS) and Zero Current Switching (ZCS) respectively. Here, different circuit modes of ZVS PWM buck converter with …

零电流开关准谐振Buck变换器——工作原理 阶段3（ t2 ＜ t ≤ t3） t2 时刻，开关管 QS 关断，阶段 3 开始 谐振电容 Cr 通过输出回路放电，其电压线性下降，t3 时刻降到 0 t2 时刻，谐振电容电压为： 12 v Cr (t2 ) VS (1 cos ) 零电流开关准谐振Buck变换器——工作原理

Consider a buck-boost QRC-ZCS converter with the following specifications: Vin=40V, Po=80W at Io=4A, fs=250kHz, Lo=0.1mH, and Co=6 μF. Design values for L and C and determine the output ripple voltage. The duty cycle D is approximately 33% since the voltage gain for the buck-boost is 0.5. Hence, the voltage ripple is,

Consider the following specifications for a ZCS buck converter of Fig. 6.8(a). Assume the parameters are: Vin = 25V, Vo = 12V, Io = 1A, fs = 250kHz Design for the resonant tank parameters L and C and calculate the peak inductor current, and peak capacitor voltage. Determine the time interval for each mode. Solution: The voltage gain is . Select .

Abstract: In order to extend the output voltage range of buck converter, a new topology of two-stage buck converter with switched capacitor is proposed in this paper. An input inductor is adopted in the first stage of the converter to suppress …

2010年3月3日 · 介绍了一种 开关 (ZVZCS) 全桥 。 通过设计宽幅压直流 ,验证了全桥 变换 在调整幅压、减小占空比丢失及消除 环流等方面无可替代的优越性。 提出了一种，该 实现了超前桥臂的 电压开关和滞后桥臂的 开关。 本文中分析了它的工作原理和参数设计，并给出了实验结果。 本文提出了一种 PW M 加相移控制的双向 。 该 结合了 和相移这两种控制技术优点，不但可以减小 应力和通态损耗，而且可以拓宽 ZVS 的范围。 本文详细地介绍和分析了 的工作原理，给出ZVS …