权力是，像人体的核心是对所有电力设备的动力。标志着功率特性参数的功率，电压，频率，噪声和负载参数的变化等;在请求相同的参数以及大小，重量，形状，效率，可靠性等。原来的位置，在某些情况下，一般的权力，经过转换，以满足使用要求。例如，汇率转换成直接的电流，高电压到低电压等。
由电力电子，交流习惯标题直流
（解释为交流电转换为直流，交流的表达交流，直流表达区）被称为整流器（包括离线整流器和改造），直交说，逆变器，交流所谓的沟通交流-交流的直接转换（在同一时间可以变量），直流称为直流-直流转换。为了实现转换的目的，手段多样。 60年代前的20世纪，研究和半导体设备的开发，并以次等的设备，以实现这些转换。电力电子从学科的形成和拥有近30年的快速发展。因此，广泛地说，如果作为一个开关半导体功率器件，将成为另一个主电路构成形式的权力被称为开关转换器电路，具有自动闭环系统的稳定性和输出环节的变化，说的保护开关电源供应量（开关电源）。开关电源的主要组成部分是DC - DC转换器，因为它是转换的核心，涉及变频。 DC - DC转换目前使用的频率提高最快的，它在提高频率的开关过程中遇到的损失机制，以提高使用的方法的有效性，也可以作为参考其他转换的方法。

共同离线开关转换器（离线开关变换器）的名称，即交直流转换，并常说整流开关，它不仅包含了整流器，和整流器，然后作出一个DC - DC变换。所谓离线转换器和城市不无关系的电路的意思，但由于转换器，高频变压器隔离，使隔离的直流输出和城市，使离线开关转换器。

Switching converter and switching power supply

Power is like the body’s heart, are the driving force for all electric equipment. Marks the parameters of the power characteristics have the power, voltage, frequency, noise and with changes in load parameters, etc.; in the same parameters of the request as well as size, weight, shape, efficiency, reliability and so on. Original location, in some cases, the general power to go through the conversion in order to meet the required use. For example, the exchange converted into direct current, high voltage into low voltage and so on.

by the customary title of Power Electronics, AC-DC (interpreted as AC converted to DC, which express AC AC, DC express DC) called the rectifier (including off-line rectifier and transform), DC-AC said inverter, AC-AC called communicate - communicate direct conversion (at the same time can be variable), DC-DC called DC - DC conversion. In order to achieve the purpose of conversion, means are diverse. 60’s before the 20th century, research and development of semiconductor devices, and an inferior race-based devices to achieve these conversions. Power electronics from the formation of disciplines and has nearly 30 years of rapid development. So, broadly, where the semiconductor power device as a switch, will be a form of power into another form of the main circuit are called the switching converter circuit; changes with automatic closed-loop stability and output links have the protection of said switching power supply ( Switching Power Supply). The main components of switching power supplies are DC-DC converters, because it is the core of the conversion, involving frequency conversion. DC-DC conversion is currently used in the frequency improve the fastest, it encountered in raising the frequency of the switching process, the loss mechanism to improve the efficiency of the method used, can also be used as reference to other conversion methods.

common to off-line switching converter (Off-line Switching Converter) the name, that is, AC-DC conversion, and is often said rectifier switch; it not only contains the rectifier, and rectifier and then make a DC-DC Transform. The so-called off-line converter and the city is not unrelated to the meaning of electric circuits, but due to converter has high-frequency transformer isolation, so that the output of the DC electric isolation and the city, so that off-line switching converter. (07-12-4)