CN203130575U - Alternating-current fan fault detecting circuit - Google Patents

Alternating-current fan fault detecting circuit Download PDF

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Publication number
CN203130575U
CN203130575U CN 201320112405 CN201320112405U CN203130575U CN 203130575 U CN203130575 U CN 203130575U CN 201320112405 CN201320112405 CN 201320112405 CN 201320112405 U CN201320112405 U CN 201320112405U CN 203130575 U CN203130575 U CN 203130575U
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China
Prior art keywords
pin
fan
detecting circuit
circuit
negative pole
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CN 201320112405
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Chinese (zh)
Inventor
梁宇
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Guangdong East Power Co Ltd
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Guangdong East Power Co Ltd
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Priority to CN 201320112405 priority Critical patent/CN203130575U/en
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Abstract

The utility model discloses an alternating-current fan fault detecting circuit which comprises a mutual inductor CT1, a photoelectric coupler U1, a triode Q1, a diode D1, a light emitting diode D2, resistors R1, R2, R3 and R4 and a capacitor C1. A first pin of CT1 is connected with a fan, a second pin of CT1 is connected with a circuit input cathode, a fourth pin of CT1 is connected with an anode of D1, a third pin of CT1 is connected with a signal ground, a first pin of U1 is connected with one end of R3, a second pin of U1 is connected with a power ground, and a cathode of C1, a third pin of U1 is connected with the signal ground, and an emitter of Q1, a fourth pin of U1 is connected with one end of R1 and an anode of D2, a cathode of D1 is connected with an anode of C1 and the other end of R3, a cathode of D2 is connected with a base of Q1, the other end of R1 is connected with an anode of a power supply and one end of R2, the other end of R2 is connected with one end of R4, TO-DSP (digital signal processor) at a circuit output end, and a collector of Q1, and the other end of R4 is connected with a signal ground. Specific fan damage positions are judged through the position of the light emitting diode, fan damage signals are transmitted to the DSP, and fan damage events can be recorded. In addition, the alternating-current fan fault detecting circuit is simpler, low in components, high in reliability, and low in cost.

Description

A kind of ac fan fault-detecting circuit
Technical field
The utility model relates to the electronic circuit technology field, particularly a kind of ac fan fault-detecting circuit.
Background technique
A kind of fan failure detection device of documents (Chinese patent application number 200920054280.9), it comprises DC power supplier, pull-up resistor, DSP digital signal processor, the cathode output end of DC power supplier is connected with the cathode power supply input end of a plurality of fans, the cathode output end of DC power supplier is connected with the negative power supply input end of a plurality of fans, one end of pull-up resistor is connected with the cathode power supply input end of a plurality of fans, the other end of pull-up resistor is connected with the signal output part of a plurality of fans, and the signal output part of a plurality of fans all is connected with the fault detection signal input end of DSP digital signal processor.
A kind of fan failure testing circuit of documents and detecting method (Chinese patent application number 200910087561.9), fan failure testing circuit of the present invention comprises: first divider resistance is connected with fan; First triode, base stage connect described first divider resistance, and collector electrode is exported first square wave to first port, judge whether fault of fan according to first square wave.The fan failure detecting method comprises: detect first square wave of first port output, when fan is not worked, if the low level interval of first square wave during greater than second thresholding, is then judged fan failure less than first thresholding or high level interval; When fan work, if first square wave is high-low level square wave at interval, then judge fan failure.
A kind of ac fan fault-detecting circuit of documents (Chinese patent application number 201020265941.5) is provided with diode D1-D7, photo coupler Q1, resistance R 1, R2, diode D8 and triode Q2; Photo coupler Q1 is provided with 1 end, 2 ends, 3 ends and 4 ends; The positive pole of D1, the negative pole of D3 are connected with the output terminal of ac power supply, and the positive pole of the negative pole of D1, the negative pole of D2, D5 is connected with the end of R1; The negative pole of D5 is connected with the positive pole of D6, and the negative pole of D6 is connected with the positive pole of D7; The positive pole of the positive pole of D3, the negative pole of D7, D4 is connected with 2 ends of photo coupler Q1; The other end of R1 is connected with 1 end of photo coupler Q1, the termination high level of R2, and 3 ends of the other end of R2, photo coupler Q1 are connected with the positive pole of D8; 4 ends of photo coupler Q1, the emitting stage of Q2 connect low level, and the negative pole of D8 is connected with the base stage of Q2, and the current collection of Q3 is the trouble signal output terminal very.
Above-mentioned three kinds of testing circuit devices are many, and circuit is complicated, and cost is higher.
The model utility content
The utility model purpose is to provide a kind of ac fan fault-detecting circuit, can find in time that fan damages, directly specifically damage position of fan by the light emitting diode position judgment, the signal that fan damages is delivered to DSP, can record fan and damage event, and circuit is simpler, components and parts are few, the reliability height, cost is low.
For reaching this purpose, the present invention by the following technical solutions:
A kind of ac fan fault-detecting circuit comprises mutual inductor CT1, photo coupler U1, triode Q1, diode D1, light emitting diode D2, resistance R 1, R2, R3, R4, capacitor C 1; CT1 the 1st pin is connected with fan, CT1 the 2nd pin is connected with circuit input negative pole, CT1 the 4th pin is connected with D1 is anodal, CT1 the 3rd pin is connected with signal ground, U1 the 1st pin is connected with R3 one end, U1 the 2nd pin and power supply ground, the C1 negative pole connects, U1 the 3rd pin and signal ground, the Q1 emitter connects, U1 the 4th pin and R1 one end, D2 is anodal to be connected, D1 negative pole and C1 positive pole, the R3 the other end connects, and the D2 negative pole is connected with the Q1 base stage, the R1 the other end and positive source, R2 one end connects, the R2 the other end and R4 one end, circuit output end TO-DSP, the Q1 collector electrode connects, and the R4 the other end is connected with signal ground.
Further, described mutual inductor CT1 is the LC-1000 of number of turn 1:1000, and photo coupler U1 is TLP521, and triode Q1 is MMBT2222A.
The beneficial effects of the utility model are: adopt ac fan fault-detecting circuit of the present utility model, specifically damage position of fan by the light emitting diode position judgment, fan is damaged the number of delivering letters deliver to DSP, the realization circuit is simple, and it is unusual to detect fan by DSP, quotes fault, can also pass through the accurate failure judgement fan of light emitting diode, and components and parts are few, and circuit is simple, and are with low cost; And isolate fully by mutual inductor, the test section is safer.
Description of drawings
Fig. 1 is the schematic representation of a kind of ac fan fault-detecting circuit of the utility model.
Embodiment
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1, a kind of ac fan fault-detecting circuit comprises mutual inductor CT1, photo coupler U1, triode Q1, diode D1, light emitting diode D2, resistance R 1, R2, R3, R4, capacitor C 1; CT1 the 1st pin is connected with fan, CT1 the 2nd pin is connected with circuit input negative pole, CT1 the 4th pin is connected with D1 is anodal, CT1 the 3rd pin is connected with signal ground, U1 the 1st pin is connected with R3 one end, U1 the 2nd pin and power supply ground, the C1 negative pole connects, U1 the 3rd pin and signal ground, the Q1 emitter connects, U1 the 4th pin and R1 one end, D2 is anodal to be connected, D1 negative pole and C1 positive pole, the R3 the other end connects, and the D2 negative pole is connected with the Q1 base stage, the R1 the other end and positive source, R2 one end connects, the R2 the other end and R4 one end, circuit output end TO-DSP, the Q1 collector electrode connects, and the R4 the other end is connected with signal ground.
Mutual inductor CT1 is the LC-1000 of number of turn 1:1000, and photo coupler U1 is TLP521, and triode Q1 is MMBT2222A.
When fan runs well, having detected electric current by mutual inductor CT1 flows through, after mutual inductor amplifies through going into the 1st pin and the 2nd pin that is added to photo coupler U1 after the current limliting after diode D1 rectification and the electrochemical capacitor C1 filtering, photo coupler U1 work this moment, the 3rd pin of U1 and the 4th pin conducting, the 3rd pin ground connection of U1, so being 0V(, the 4th pin level do not consider the PN junction pressure drop), this moment, the light emitting diode input terminal voltage was 0V, this moment, light emitting diode was not luminous, and triode Q1 does not work, and high level signal is given TO-DSP after VCC process resistance R 2 and the R4 dividing potential drop, when TO-DSP detects high level signal, illustrate that fan work is normal.
When fan running is undesired, mutual inductor CT1 detects less than electric current, diode D1, electrochemical capacitor C1 does not work, the 1st pin of photo coupler U1 and the 2nd pin are not, so the 3rd pin of U1 and the 4th not conducting of pin, this moment, VCC was through light emitting diode D2, be added on the B utmost point (base stage) of triode Q1, the Q1 conducting, light emitting diode D1 is luminous, the C utmost point (collector electrode) of triode Q1 and the E utmost point (emitter) conducting, the E utmost point (emitter) ground connection is low level so give the signal of TO-DSP this moment, and ac fan operation irregularity this moment is described.
Light emitting diode can arrange according to fan, the corresponding diode of each fan, and the accurate failure judgement fan in aspect, thus realize the unusual fast detecting of fan.
The above is preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., all should be included within the protection domain of the present utility model.

Claims (2)

1. an ac fan fault-detecting circuit is characterized in that, comprises mutual inductor CT1, photo coupler U1, triode Q1, diode D1, light emitting diode D2, resistance R 1, R2, R3, R4, capacitor C 1; CT1 the 1st pin is connected with fan, CT1 the 2nd pin is connected with circuit input negative pole, CT1 the 4th pin is connected with D1 is anodal, CT1 the 3rd pin is connected with signal ground, U1 the 1st pin is connected with R3 one end, U1 the 2nd pin and power supply ground, the C1 negative pole connects, U1 the 3rd pin and signal ground, the Q1 emitter connects, U1 the 4th pin and R1 one end, D2 is anodal to be connected, D1 negative pole and C1 positive pole, the R3 the other end connects, and the D2 negative pole is connected with the Q1 base stage, the R1 the other end and positive source, R2 one end connects, the R2 the other end and R4 one end, circuit output end TO-DSP, the Q1 collector electrode connects, and the R4 the other end is connected with signal ground.
2. ac fan fault-detecting circuit as claimed in claim 1 is characterized in that, described mutual inductor CT1 is the LC-1000 of number of turn 1:1000, and photo coupler U1 is TLP521, and triode Q1 is MMBT2222A.
CN 201320112405 2013-03-12 2013-03-12 Alternating-current fan fault detecting circuit Active CN203130575U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320112405 CN203130575U (en) 2013-03-12 2013-03-12 Alternating-current fan fault detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320112405 CN203130575U (en) 2013-03-12 2013-03-12 Alternating-current fan fault detecting circuit

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CN203130575U true CN203130575U (en) 2013-08-14

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109931287A (en) * 2019-04-10 2019-06-25 深圳市恩玖科技有限公司 A kind of fault detection circuit and its fault detection method of ac fan

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109931287A (en) * 2019-04-10 2019-06-25 深圳市恩玖科技有限公司 A kind of fault detection circuit and its fault detection method of ac fan
CN109931287B (en) * 2019-04-10 2020-06-12 深圳市恩玖科技有限公司 Fault detection circuit of alternating current fan and fault detection method thereof

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