题目内容
A power supply can be broken down into a series of blocks: transformer, rectifier, filter, and voltage regulator, each of which performs a particular function.
查看答案
搜索结果不匹配？点我反馈
更多问题
The transformer can convert AC electricity from one voltage to another with little loss of power. Most power supplies use a step-down transformer to reduce the high AC mains voltage ( 230V or 110V ) to a safer low AC voltage .
The rectifier uses the ability of a diode to conduct during one half cycle of AC to convert AC to DC. A single diode rectifier only uses the positive half part of the AC wave to produce a half-wave varying DC.
A bridge rectifier uses four diodes connected in a bridge network to produce a full-wave varying DC output .
Filtering is performed by a large value electrolytic capacitor connected across the DC supply, supplying current to the output when the varying DC voltage from the rectifier is falling.
微信支付 
支付宝支付