Redundant-designed high-reliability power supply circuit topology
A power circuit and reliability technology, applied in the field of high-reliability power circuit topology, can solve the problems of difficulty in providing high-power loads, complex internal circuit devices, short continuous working time, etc., to achieve strong operation and maintenance performance, simple circuit design, The effect of avoiding contact with the outside world
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[0022] The development of a redundantly designed high-reliability power supply board in this embodiment includes: a heat dissipation structure shell, an excitation surge suppression circuit, a common mode choke circuit, a rectifier bridge circuit, a DC-DC switching power supply module, and an output LC Filter circuit, safety bleeder resistor circuit.
[0023] The following is a detailed description with reference to the accompanying drawings. Please refer to figure 1 . The input end is connected to 220VAC mains power, and there is a fuse F1 in series on the live wire to prevent short circuit or excessive current from burning the board. A varistor R7 is connected in parallel between the live wire and the neutral wire. When the voltage at both ends exceeds the threshold, the resistance value of the varistor R7 is 0, and the excessive current is exported in time to avoid damage to the subsequent circuit.
[0024] Please refer to figure 2 , two X capacitors C1, C2 are connect...
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