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在我国早期引进的录像机家族中,其电源部分大多是利用低频电源变压器进行低压变换,与目前流行的开关稳压电源相比,其稳压性能及转换效率等方面均略显不足。由于此种电源电路中的电源变压器直接与市电并联使用,当电网电压波动太大时,变压器的工作可靠性将大大降低,尤其是内部绝缘系统略差的变压器损坏的机率更大。目前在国内市场上录像机用的电源变压器很难购到,特别是机型较特殊且社会拥有量少的机器,寻购其配套电源变压器更是难上加难,因
In China’s early introduction of the VCR family, most of its power supply is the use of low-frequency power transformers for low-voltage conversion, and the current popular switching power supply, the regulator performance and conversion efficiency are slightly less. Since the power transformers in this power circuit are directly used in parallel with the mains, when the voltage of the power grid fluctuates too much, the reliability of the transformers will be greatly reduced. Especially the transformers with slightly worse internal insulation systems are more likely to be damaged. Currently in the domestic market, it is difficult to purchase power transformers for video recorders. In particular, it is even harder to find a complete set of power transformers with a special type of machine and a low social ownership.