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近年来,热工计量中所用的自动化仪表,其桥路部分,多采用由稳压管装制的稳压电源供电。使用维修人员,对于这种新的稳压电源大都比较陌生,再加上缺少专用测试仪器,所以修复工作困难较多。我们在实际工作中,对于稳压电源所出现的故障,作了认真的摸索。下面谈一点粗浅的认识。硅稳压管稳压电源的工作原理如下:交流电流经变压器 L 和 L_1、L_2(如图1)绕组变为2×33伏或2×35伏交流电,由 D_1、D_2作全波整流,经滤波
In recent years, thermal instrumentation used in automated instrumentation, the bridge part of the more use of regulated voltage regulator installed power supply. The use of maintenance staff, most of the new power supply is relatively strange, coupled with the lack of special test equipment, so repair more difficult. In the actual work, we made serious exploration for the breakdown of power supply. Here to talk a little superficial understanding. The working principle of silicon regulator power supply is as follows: AC current through the transformer L and L_1, L_2 (Figure 1) winding into 2 × 33 V or 2 × 35 V AC by D_1, D_2 for full-wave rectification, Filter