Computer chassis with backup power supply
A backup power supply and computer technology, applied in computing, data processing power supply, electrical digital data processing, etc., can solve the problems of lack of dust-proof device on the top, affect the service life of the computer, and poor cooling function of the chassis, etc., to achieve good ventilation and heat dissipation , easy installation and maintenance, and avoid loss of effect
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Embodiment 2
[0020] Embodiment 2: on the basis of embodiment 1, the internal circuit of the power supply box 5 of this design is as follows image 3 As shown, after the 220V mains is stepped down by R1, rectified by diode D1, and high-frequency interference is filtered out by capacitor C1, a half-wave pulsating voltage with a peak value of 200V and a period of 20ms is generated at the cathode of diode D1, and the transient voltage suppression diode DW is used In order to eliminate the peak voltage generated by the mains fluctuation, it can clamp the peak voltage to the full value. During the duration of the half-wave voltage, one path of the voltage is added to the base of the triode V2 through the resistor R2 and the secondary winding N2 of the pulse transformer W, so that V2 is turned on; the other path passes through the W primary N1 winding, and the emitter, collector and Negative feedback resistor R4 to both ends of capacitor C2, V2 and W, R4, C2, etc. constitute an intermittent oscil...
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