490NRP25400 SCHNEIDER 控制系统

490NRP25400 SCHNEIDER 控制系统

490NRP25400 SCHNEIDER 控制系统

SCHNEIDER 490NRP25400 电源可以大致分为线性的和转换类型。线性功率转换器直接处理输入功率，所有有源功率转换部件都在其线性工作区域内工作。

在开关功率转换器中，输入功率在处理之前被主要以非线性模式工作的元件(例如，大部分时间处于截止或饱和状态的晶体管)转换成交流或DC脉冲。当元件工作在线性区域时，功率会“损失”(转化为热量)，因此开关转换器通常比线性转换器更有效，因为其元件在线性工作区域花费的时间更少。

交流-DC电源在交流输入电压下工作，并产生DC输出电压。根据应用要求，输出电压可能包含大量或可忽略不计的交流频率成分，称为脉动电压，与交流输入电压频率和电源的运行有关。在DC输入电压下工作的DC电源称为直流-DC转换器。这一节主要集中在交流到DC的变化。

490NRP25400 SCHNEIDER 控制系统

The SCHNEIDER 490NRP25400 power supply can be broadly divided into linear and conversion types. Linear power converters handle input power directly, and all active power converters operate within their linear operating area.

In a switching power converter, the input power is converted into an AC or DC pulse before processing by a component that operates primarily in a nonlinear mode (e.g., a transistor that is off or saturated most of the time). Power is "lost" (converted to heat) when the component is operating in a linear region, so switching converters are generally more efficient than linear converters because their components spend less time in the linear operating region.

Ac-dc power supplies operate at AC input voltage and produce DC output voltage. Depending on the application requirements, the output voltage may contain a large or negligible AC frequency component, known as the pulsating voltage, which is related to the AC input voltage frequency and the operation of the power supply. A DC power supply that operates at a DC input voltage is called a DC-DC converter. This section focuses on changes in communication to DC.