推荐回答(2个)
电源开关的英文:Power switch
电源开关就是用通过电路控制开关管进行高速的道通与截止.将直流电转化为高频率的交流电提供给变压器进行变压,从而产生所需要的一组或多组电压。
电源开关里有一扇门,一开门电源就通过,一关门电源就停止通过,那么什么是门呢,开关电源里有的采用可控硅,有的采用开关管,这两个元器件性能差不多,都是靠基极、(开关管)控制极(可控硅)上加上脉冲信号来完成导通和截止的,脉冲信号正半周到来,控制极上电压升高,开关管或可控硅就导通,由220v整流、滤波后输出的300v电压就导通。
通过开关变压器传到次级,再通过变压比将电压升高或降低,供各个电路工作。振荡脉冲负半周到来,电源调整管的基极、或可控硅的控制极电压低于原来的设置电压,电源调整管截止,300v电源被关断,开关变压器次级没电压,这时各电路所需的工作电压,就靠次级本路整流后的滤波电容放电来维持。

扩展资料:
开关的作用
1.交流电源输入经整流滤波成直流;
2.通过高频pwm(脉冲宽度调制)信号控制开关管,将那个直流加到开关变压器初级上;
3.开关变压器次级感应出高频电压,经整流滤波供给负载;
4.输出部分通过一定的电路反馈给控制电路,控制pwm占空比,以达到稳定输出的目的。
参考资料:百度百科-电源开关
“电源开关”的英文是什么:
1.mains switch
2.power onoff button
3. power switch
例句:
至少要打开一个进风口和出风口,才能启动电源开关。You must open at least the air inlet and one air outlet before switching on the respirator.
设置电源开关,可以自由手动调节。Set up power switch which can be manually adjusted freely.
关掉所有的电源,包括调音台电源开关和幻像电源开关。Turneverything off, including the mixer's POWER switch and PHANTOMPOWER switch.
通过面板按钮即可方便完成单位切换和电源开关。You can use the button in the panel to switch the unit and turn the gauge on and off.
合上电控箱内的电源开关,检查微电脑显示是否正常。Power on the unit and check the display of the microcomputer.
拓展例句:
当您按下服务器上的电源开关时,系统魔术般地启动了,这一切似乎很简单,但正如您从本文中看到的,AIX系统启动时发生了很多事情。It may not seem like a lot when you press the power button on a server and it magically starts up, but as you can see, there's a lot to the AIX system when it is starting.
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关机冷却,工作结束不使用机器,关闭电源开关,机器将自动冷风延时关机。
When you turn off the power, the machine will delay shut down after the temperature comes down.
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检查机器电源开关是否打开。
Check the machine power switch is turned on.
打开电源开关并按下启动钮,以继续运转。Put the power switch on and press operation button for continuous operation.
基于硬件控制防遗忘关断电源开关控制器Switch controller guarding against forgetting to turn off power supply based on hardwarecontrol .
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