1. minitype, thin, lightweight

因为电源轻,小,薄的关键是高频化,所以,国外现在都在致力于开发新式高频元器材，特別是改进二次整流管的损耗、变压器及电容的小型化，并一起选用表面装置(SMT) 技能在印制电路板两面安置元器材以保证开关电源的轻、小、薄。

Because the power of light, small, thin is the key to high frequency, so that foreign are now committed to the development of new high frequency element equipment, especially the improvement of the two loss, rectifier transformer and capacitor miniaturization, and selection of surface device (SMT) skills in printed circuit board surface mounting equipment to ensure two yuan the switching power supply of light, small, thin.

2.高功率

2. high power

开关电源高频化使传统的PWM开关（硬开关）功耗加大，功率下降，噪声也增大了， 达不到高频、高效的预期效益，因此，完成零电压导通、零电流关断的软开关技能将变成开关电源未来的干流。选用软开关技能能够使功率达到88% ~92%。

High frequency switching power supply PWM switch (traditional hard switching) power consumption increase, power down, noise also increases, not up to the expected benefits of high frequency and high efficiency, therefore, the soft switching techniques with zero voltage and zero current turn off switching power supply in the future will become the mainstream. The use of soft switch ability can make the power reach 88% ~92%.

3.高可靠性

3. high reliability

在规划方面，开关电源运用较少的器材，进步了集成度，这么不光处理了电路复要、可靠性差的问题，也增加了保护等功能，简化了电路，进步了均匀无毛病时刻。特别是开关电源的呈现，极大进步了可靠性。

In terms of planning, switching power supply uses less equipment and improves integration. It not only solves the problem of complex circuit and poor reliability, but also increases protection functions. It simplifies the circuit and improves the even time. In particular, the switching power supply has greatly improved the reliability.

4.模块化

4. modularization

开关电源模块化（模块电源）能够构成分布式电源体系，然后进步可靠性；能够做成插人式，完成热交换，然后在运转中呈现毛病时能迅速替换模块插件；多台模块并联可完成大功率电源体系。此外，还能够在电源体系建成后，依据发展需要不断扩大其容量。

Switching power supply module (power supply module) to constitute a distributed power system, then advance the reliability; can be made into style, complete heat exchange, then the fault in the operation can quickly replace the module plug-in; multi module parallel power supply system can be completed. In addition, it is able to expand its capacity in accordance with the development needs after the power system is built.

5.低噪声

5. low noise

开关电源的一个缺陷是噪声大。若单纯寻求电源高频化，噪声便随之增大。选用部分有谐振改换技能，在原理上来说既能够完成髙频化，乂能够下降噪声。但谐振改换技能也有其缺陷，如难精确地操控开关频率、谐振时增大了元器材负荷、场效应管的寄生电容易导致短路损耗，元器材热应力难以转向开关管等。

One of the defects of the switching power supply is the large noise. If the power supply is simply sought, the noise will increase. The part of a change in the resonant skills, it can accomplish the principle of high frequency can reduce noise, mow. But the technology of resonant conversion has its drawbacks. For example, it is difficult to control the switching frequency accurately, increase the load of the meta device and the parasitic electricity of the field effect transistor, and cause the short circuit loss easily, and the thermal stress of the element is hard to turn to the switch tube.

6.电源体系的办理和操控

6. power supply system handling and manipulation

应用微处理器或计算机集中操控和办理电源体系，能够及时反映开关电源环境的各种变 化。用中央处理单元完成智能操控，可主动确诊毛病，减少保护工作量，保证开关电源的正常运转。

The application of microprocessor or computer to control and handle the power system can reflect the changes of the switching power environment in time. Using the central processing unit to complete the intelligent control, it can actively diagnose the fault, reduce the workload of protection, and ensure the normal operation of the switching power supply.

7.计算机辅助规划（CAD)

7. computer aided planning (CAD)

使用计算机对开关电源进行CAD规划和模拟实验，非常有用，是最为迅速经济的规划办法。常选用的软件有Pspice、Saber, Multisim等.

It is very useful to use the computer to make the CAD planning and simulation experiment on the switching power supply. It is the most rapid economic planning method. The commonly used software is Pspice, Saber, Multisim and so on.