反激变换器的例子
Analysis of basic waveforms 基本波形分析
The analysis of the basic waveforms will be done on a simulated example of a flyback converter operating in discontinuous conduction mode. Typical drain-source voltage waveform of the primary side switch is shown in Fig. 16.
在电感电流断续模式下运行的反激变换器的典型一次侧漏源极开关电压波形见图１６。
Fig. 16 Typical drain-source voltage of the MOSFET in a flyback
图１６ 反激变换器的典型漏源极电压
These drain-source voltage waveforms can be theoretically distinguished into typical elements. Different physical phenomena influen
ce the waveform at given time interval. Fig. 17 and Tab. 4 demonstrate the main elements of the voltage waveform. The superposition of all these elements results in a typical drain-source voltage shown in Fig. 16.
这些漏源极电压波形能用典型的理论来描述。各个时间段有不同物理现象影响这些波形。图１７和平台４描述了电压波形的主要原理。把这些原理按时序整合呈现出图１６所示的典型漏源极电压。
Fig. 17 Main elements of the drain-source voltage
图１７ 漏源极电压的主要原理
原理１：开通期间的电压下降过程
原理２：在开通期间因寄生震荡产生的电流尖刺
原理３：关断期间的电压上升
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