一种新型电子降压变压器的设计与仿真分析

Design and Simulation Analysis of a New Electronic Step-down Transformer

尽管电磁变压器有运行稳定的优点,但也有消耗铜、铁材料多和体积、重量大的缺点。于是,研制轻便、可靠的电子降压变压器就成为当今的课题。现有的电子降压变压器大多数采用两个晶闸管控制的电子降压电路。电子降压变压器对于纯阻性负载(如白炽灯泡)是可用的,但是对于容性负载(如需AC100V供电的功放电路),尤其在音量小、长时间使用时,会因电压过高而损坏。针对上述问题,提出了一种自行设计的电子降压变压器,并对电路进行了仿真分析。结果表明电子降压变压器在容性负载时也能稳定运行,另外,它还具有输出电压可调、电路简单、体积小和重量轻等优点,因此,具有一定的适用范围。

Although electromagnetic transformer is steady in operation, it has such disadvantages as more consume of brass and iron, heavy weight and large volume. So the light and reliable electronic step - down transformer has become the current interest of study. The present electronic step - down transformers mostly adopt the voltage step - down circuit controlled by two thyristors. It is practicable for the pure resistance load, but not for the capaci- tive load, especially in the low voice and long - time working, the transform will be damaged owing to the higher volt- age. In order to solve the above problems, the paper develops a self - designed electronic step - down transformer and the circuits are simulated. Results show that the electronic step - down transformers can operate steadily with capacitive load, furthermore, it has such advantages as adjustable output voltage, simple circuit, small volume and light weight, so this transformer can be used in a certain domain.