AC solid state relay and fault detecting method of load circuit of same
A solid-state relay and power circuit technology, applied in circuit breaker testing, electrical components, electronic switches, etc., can solve the problem that the reliability and safety of solid-state relays cannot be guaranteed, increase the complexity of internal circuits and design and manufacturing costs, and cannot detect Solid-state relay thyristor failure and other problems, to increase the complexity of the circuit, the overall structure is compact and compact, and improve the safety and reliability of use
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[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0043] Such as Figure 2 to Figure 9 As shown, the present invention discloses an AC solid state relay and its internal circuit connection structure. The AC solid state relay includes a power supply circuit 1, an input circuit 2, a thyristor, an alarm output circuit 3, a zero-crossing sampling circuit 4, a controllable Silicon trigger circuit 5, temperature measuring circuit 6 and single-chip microcomputer 7, single-chip microcomputer 7 includes power input terminal 71, signal input terminal 72, alarm output terminal 73, zero-crossing signal detection terminal 74, trigger signal output terminal 75 and temperature detection terminal 76, see figure 2 ;
[0044] Wherein, the function of the power supply circuit 1 is to convert the external power supply into the power supply required by the internal circuit, and the output terminal of the power...
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