A dual-power conversion control circuit based on single-chip microcomputer
A dual power conversion and control circuit technology, applied in circuit devices, emergency power supply arrangements, electrical components, etc., can solve the problems of high cost, many components, misjudgment, etc. Effect
Active Publication Date: 2015-08-12
DELIXI ELECTRIC
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Problems solved by technology
[0002] One of the existing dual power conversion controllers uses a transformer combined with an operational amplifier circuit to detect voltage undervoltage, overvoltage, and phase loss. Its disadvantages are high cost and large volume
The other is to use the optocoupler to detect voltage undervoltage, overvoltage, and phase loss, and combine the 555 timer and peripheral analog circuits to control the conversion. The accuracy deviation is large and the judgment is misjudged, and it is an analog circuit with many components, which occupies a large area of the circuit board, and the failure rate is very high. The single-signal control of the conversion output is susceptible to electromagnetic interference.
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[0017] Such as figure 1 — Figure 6 Said, a dual-power conversion control circuit based on a single-chip microcomputer, including a common power supply phase loss signal detection circuit, a backup power supply phase loss signal detection circuit, a common power supply under-overvoltage signal detection circuit, a backup power supply under-overvoltage signal detection circuit, The conversion output control circuit is the same as the single chip microcomputer and the relay power supply circuit, wherein the common power supply phase loss signal detection circuit is consistent with the standby power supply phase loss signal detection circuit, and the common power supply phase loss signal detection circuit includes four sets of current limiting resistors R12, R34, R56 , R7, wherein the current limiting resistor R12 can be connected in series with R1 and R2, the current limiting resistor R34 can be connected in series with R3 and R4, the current limiting resistor R56 can be connect...
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The invention relates to a double-power-source automatic switching control circuit, in particular to a double-power-source switching control circuit based on a single-chip microcomputer. The single-chip microcomputer is used for processing voltage signals and making switching judgment, and a triode is used for controlling switching. According to the technical scheme, the double-power-source switching control circuit based on the single-chip microcomputer is characterized by comprising a frequently-used power source phase loss signal detection circuit, a standby power source phase loss signal detection circuit, a frequently-used power source under-voltage and over-voltage signal detection circuit, a standby power source under-voltage and over-voltage signal detection circuit, a switching output control circuit, the single-chip microcomputer and a relay power source circuit. The double-power-source switching control circuit based on the single-chip microcomputer overcomes the defects in the prior art and is simple in circuit, fewer in element and reliable in judgment and switching.
Description
technical field [0001] The invention relates to a dual power supply automatic conversion control circuit which utilizes a single-chip microcomputer to process voltage signals and make conversion judgments, and uses triodes to control conversion. Background technique [0002] One of the existing dual power conversion controllers uses a transformer combined with an operational amplifier circuit to detect voltage undervoltage, overvoltage, and phase loss. Its disadvantages are high cost and large volume. The other is to use the optocoupler to detect voltage undervoltage, overvoltage, and phase loss, and combine the 555 timer and peripheral analog circuits to control the conversion. The precision deviation is large and misjudged, and it is an analog circuit with many components, which occupies a large area of the circuit board, and the failure rate is very high. The single-signal control of the conversion output is susceptible to electromagnetic interference. Contents of the...
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IPC IPC(8): H02J9/06
Inventor 陈志伟孙刚王艳松
Owner DELIXI ELECTRIC