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三、开关电源中的主要元器件为了保证彩色电视机的可靠工作,彩电开关电源对元器件的要求较高。因此,了解开关电源中主要元器件的构造、性能以及在电路中的作用,是检修工作的重要组成部分。下面分别介绍各类开关电源中的互感滤波器,开关变压器,开关功率凋整管,厚膜电路及可控硅等主要元器件。 1.互感滤波器互感滤波器也叫电源滤波器,接在开关电源的交流回路中。利用匝数比为1:1的两个电感构成的双向滤波器,既可滤除外界进入电视机的高频干扰,也可滤除开关电源产生的高频脉冲谐波干扰污染市电电源。互感滤波器采用双线并绕,骨架为高频磁性材料,
Third, the main components of the switching power supply In order to ensure the reliable operation of color TV, color TV switching power supply components on the higher requirements. Therefore, understanding the main components of switching power supply structure, performance and role in the circuit is an important part of maintenance work. Here are the various types of switching power supply in the mutual inductance filter, switching transformers, switching power wattage tube, thick film circuits and SCR and other major components. Mutual inductance filter Mutual inductance filter, also known as power filter, connected to the switching power supply in the AC circuit. The bidirectional filter with two inductors with turns ratio of 1: 1 not only can filter the high-frequency interference of the outside into the TV, but also can filter out the high-frequency pulse harmonics generated by the switching power supply to pollute the mains supply. Mutual inductance filter with double and around, the skeleton of high-frequency magnetic materials,