DC power supply surge suppressor
A technology of surge suppressor and DC power supply, applied in the field of power supply, can solve the problem that the sub-system cannot automatically resume normal operation, and achieve the effect of improving the impact resistance.
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[0013] Embodiments of the present invention are shown in FIGS. 1 and 2 : in FIG. 1 , a surge voltage sampling circuit 1 , a voltage clamping circuit 2 , an overvoltage switch circuit 3 , a solid state relay 4 , and a housing 5 are shown.
[0014] For example: In the DC 28V power supply system on the unmanned aircraft, we tried a power surge suppressor to solve this problem. The circuit diagram is shown in Figure 3, and the circuit diagram is set to realize the protection function when the power supply voltage exceeds 35V.
[0015] The aircraft power supply is input by a (+28V) and b (ground), and the three resistors R1 (11KΩ), R2 (11KΩ) and R3 (5.1KΩ) are sampled from the power supply, and the voltage of R3 is the sampling voltage. When the sampling voltage exceeds the clamp When the sum of the base point voltage of the Zener diode D1 (6.2V) and the overvoltage switching transistor (BD681), a surge voltage appears in the power supply at this time, the transistor is turned on, ...
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