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待机能耗是用电设备不可避免的损耗,为降低家用电器的待机损耗,本文提出一种用在隔离型待机电源上的低损耗电路,具有功率因数补偿功能。该电路是根据电容分压原理,先将市电由两个电容分压降为低压交流电,经过整流滤波获得直流电压,经过隔离稳压、保护电路后给待机电路供电。根据这个原理设计了一个实际应用待机电路,该待机电路损耗低于1W,低于传统的待机电路,满足“1W计划”的要求。通过本电路不仅可以解决家用电器等设备待机损耗过大,同时由于该电路具有显容性还有一定的无功补偿功能。对减少能源消耗、缓解日趋紧张的能源压力和环保压力等有较高的参考价值。
Standby power consumption is the inevitable loss of electrical equipment, in order to reduce standby consumption of household appliances, this paper presents a low-loss circuit used in isolated standby power supply, with power factor compensation. The circuit is based on the principle of capacitor voltage divider, the first electricity from the two capacitors to low voltage AC voltage divider, DC voltage after rectification and filtration, after isolation and regulation, the protection circuit to the standby circuit power supply. According to this principle, a practical application standby circuit is designed. The standby circuit consumes less than 1W, which is lower than the traditional standby circuit and meets the requirements of 1W Program. Through this circuit can not only solve the household appliances such as equipment standby loss is too large, at the same time due to the circuit has a significant capacity of reactive power compensation. It has a higher reference value for reducing energy consumption, easing tense energy pressure and environmental pressure.