CN204099254U - DC fan clamping type testing circuit in ups power system - Google Patents
DC fan clamping type testing circuit in ups power system Download PDFInfo
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- CN204099254U CN204099254U CN201420506045.1U CN201420506045U CN204099254U CN 204099254 U CN204099254 U CN 204099254U CN 201420506045 U CN201420506045 U CN 201420506045U CN 204099254 U CN204099254 U CN 204099254U
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Abstract
DC fan clamping type testing circuit in ups power system, relate to DC fan detection field, comprise the fluctuation voltage detection circuit and signaling conversion circuit that connect successively, the utility model arranges fluctuation voltage detection circuit to detect the voltage change situation at described DC fan two ends, thus the change frequency of the induction reactance of coil in acquisition DC fan, according to the characteristic of DC fan, DC fan is rotated one week, the number of cycles of the induction reactance change of the coil in DC fan is suitable with the blade quantity of fan, so, the change frequency getting the induction reactance of the coil in DC fan just accurately can draw the rotating speed of DC fan, the utility model is provided with clamper amplification circuit in signaling conversion circuit simultaneously, can carry out voltage protection on the one hand to whole testing circuit, can also play amplification simultaneously, improve Detection results to detection electrical signal.
Description
Technical field
The utility model relates to DC fan detection field, is specially DC fan clamping type testing circuit in ups power system.
Background technique
UPS(Uninterrupted Power Supply, uninterruptable power source) be the power apparatus that alternating electromotive force can be provided when grid power blackout, be the equipment that some need the equipment of constant power supply supply and must be equipped with.Heat radiation no less important for UPS, current many UPS equipment are provided with DC fan in the place of needs heat radiation, to reach the object of heat radiation, but also can break down during DC fan work, maintain and replace is carried out as found out fault fan not in time, just may bring unnecessary loss to UPS, therefore many UPS are equipped with the testing circuit detecting DC fan fault, traditional testing circuit be generally by with DC fan series RC circuit sampled voltage, high level or low level trouble signal is converted into again by peripheral circuit, DC fan can only be detected like this rotate and do not rotate both of these case, stall can not be detected, more accurately can not detect the rotating speed of fan, and the protection of the testing circuit of existing DC fan to overload and load short circuits is inadequate, owing to lacking, protective circuit or protective circuit cause not in time often for the damage of detector, although some specific integrated circuit is integrated with certain protective function, but often Protection parameters is single can not realize artificer's intention easily, and do not use the scheme possessing protective function intergrated circuit, then detector is in the state of running nakedly, and faces the damage under fortuitous event at any time.Even if having a mind to independent design protection circuit, often circuit relative complex, cost is also corresponding higher, and in addition, when testing circuit signal weaker, if signal can not be amplified, the accuracy for testing result has a great impact.
Model utility content
The purpose of this utility model is to provide DC fan clamping type testing circuit in a kind of ups power system, to solve the problem in background technique.
For achieving the above object, the utility model provides following technological scheme:
DC fan clamping type testing circuit in ups power system, comprise the fluctuation voltage detection circuit and signaling conversion circuit that connect successively, described fluctuation voltage detection circuit comprises divider resistance R1 and voltage-stabiliser tube D1, the D2 in parallel with described divider resistance R1, divider resistance R1 connects with DC fan FAN, voltage-stabiliser tube D1 one end ground connection, the other end is connected between diode D3 and DC fan FAN; Described signaling conversion circuit comprises triode Q1, metal-oxide-semiconductor T1, diode D3, electric capacity C1, electric capacity C2 and divider resistance R2, the base stage of triode Q1 is connected with one end of divider resistance R2 via electric capacity C1, the other end ground connection of described divider resistance R2, diode D3 is in parallel with electric capacity C1, the negative pole of diode D3 is connected to the contact of electric capacity C1 and triode Q1, the external DC fan FAN of positive pole of diode D3; Triode Q1 collector electrode is connected with the base stage of triode Q2 by resistance R8 by resistance R5 ABAP Adapter VCC, triode Q1 emitter; The grid of metal-oxide-semiconductor T1 is connected with the collector electrode of triode Q1 via electric capacity C2, and grid accesses power vd D simultaneously, the drain electrode output detections signal FANNET of metal-oxide-semiconductor T1, and source electrode is by resistance R7 ground connection, and the contact of electric capacity C2 and metal-oxide-semiconductor T1 is by resistance R9 ground connection; Be provided with clamper amplification circuit at the inter-collector of described electric capacity C2 and triode Q1, described clamper amplification circuit comprises operational amplifier U, metal-oxide-semiconductor T2 and resistance R3, R6, R7 and R8; The drain electrode of described metal-oxide-semiconductor T2 connects and accesses input voltage through resistance R6, the grid of metal-oxide-semiconductor T2 is connected with the output terminal out of operational amplifier U and resistance R3 one end, the source ground of metal-oxide-semiconductor T2, operational amplifier U reverse input end is connected with the tie point of resistance R7 one end and resistance R8, the tie point that the other end and electric capacity C2 and the metal-oxide-semiconductor T2 of resistance R7 drain is connected, resistance R8 the other end ground connection, the resistance R7 the other end drains with metal-oxide-semiconductor T2 and is connected, and as electrical signal.
Further, one end ground connection of described voltage-stabiliser tube D2, the other end is connected with the grounding end of resistance R2 and the positive pole of diode D3.
In sum, the utility model arranges fluctuation voltage detection circuit to detect the voltage change situation at described DC fan two ends, thus the change frequency of the induction reactance of coil in acquisition DC fan, according to the characteristic of DC fan, DC fan is rotated one week, the number of cycles of the induction reactance change of the coil in DC fan is suitable with the blade quantity of fan, and so, the change frequency getting the induction reactance of the coil in DC fan just accurately can draw the rotating speed of DC fan; The utility model is provided with clamper amplification circuit in signaling conversion circuit simultaneously, can carry out voltage protection on the one hand to whole testing circuit, can also play amplification simultaneously, improve Detection results to detection electrical signal.
Accompanying drawing explanation
Fig. 1 is circuit theory diagrams of the present utility model.
Embodiment
The technological means realized to make the utility model, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the utility model further.
DC fan clamping type testing circuit in ups power system as shown in Figure 1, comprise the fluctuation voltage detection circuit and signaling conversion circuit that connect successively, described fluctuation voltage detection circuit comprises divider resistance R1 and voltage-stabiliser tube D1, the D2 in parallel with described divider resistance R1, divider resistance R1 connects with DC fan FAN, voltage-stabiliser tube D1 one end ground connection, the other end is connected between diode D3 and DC fan FAN; Described signaling conversion circuit comprises triode Q1, metal-oxide-semiconductor T1, diode D3, electric capacity C1, electric capacity C2 and divider resistance R2, the base stage of triode Q1 is connected with one end of divider resistance R2 via electric capacity C1, the other end ground connection of described divider resistance R2, diode D3 is in parallel with electric capacity C1, the negative pole of diode D3 is connected to the contact of electric capacity C1 and triode Q1, the external DC fan FAN of positive pole of diode D3; Triode Q1 collector electrode is connected with the base stage of triode Q2 by resistance R8 by resistance R5 ABAP Adapter VCC, triode Q1 emitter; The grid of metal-oxide-semiconductor T1 is connected with the collector electrode of triode Q1 via electric capacity C2, and grid accesses power vd D simultaneously, the drain electrode output detections signal FANNET of metal-oxide-semiconductor T1, and source electrode is by resistance R7 ground connection, and the contact of electric capacity C2 and metal-oxide-semiconductor T1 is by resistance R9 ground connection; Be provided with clamper amplification circuit at the inter-collector of described electric capacity C2 and triode Q1, described clamper amplification circuit comprises operational amplifier U, metal-oxide-semiconductor T2 and resistance R3, R6, R7 and R8; The drain electrode of described metal-oxide-semiconductor T2 connects and accesses input voltage through resistance R6, the grid of metal-oxide-semiconductor T2 is connected with the output terminal out of operational amplifier U and resistance R3 one end, the source ground of metal-oxide-semiconductor T2, operational amplifier U reverse input end is connected with the tie point of resistance R7 one end and resistance R8, the tie point that the other end and electric capacity C2 and the metal-oxide-semiconductor T2 of resistance R7 drain is connected, resistance R8 the other end ground connection, the resistance R7 the other end drains with metal-oxide-semiconductor T2 and is connected, and as electrical signal; In addition, one end ground connection of described voltage-stabiliser tube D2, the other end is connected with the grounding end of resistance R2 and the positive pole of diode D3.
The voltage change frequency at DC fan two ends described in fluctuation voltage detection electric circuit inspection also produces the voltage detection signal identical with its change frequency and passes to signaling conversion circuit, and the digital signal as fan running state index signal that described voltage detection signal is converted to the proportional relation of frequency of frequency and described voltage detection signal by signaling conversion circuit exports.
Divider resistance R1 is exactly voltage detection signal via the voltage signal at the divider resistance R1 two ends that resistance R2 and electric capacity C1 exports to triode Q1, when the voltage at divider resistance R1 two ends diminishes, because electric capacity C1 both end voltage can not be suddenlyd change, triode Q1 base voltage is dragged down, triode Q1 ends, the drain electrode of metal-oxide-semiconductor T1 is charged from 12V ABAP Adapter via electric capacity C2 and resistance R5, so metal-oxide-semiconductor Q2 conducting, the output terminal of signaling conversion circuit, namely the digital signal input that the grid of metal-oxide-semiconductor Q2 exports to fault judging circuit jumps to low level from high level, now, electric capacity C1 via resistance R4 from ABAP Adapter VCC quick charge, make to return to high level in the base level short time of triode Q1, triode Q1 recovers conducting, metal-oxide-semiconductor T1 recovers cut-off, digital signal input is from low transition to high level, in addition, the voltage at divider resistance R1 two ends also can allow the base level of triode Q1 return to high level to allow triode Q1 conducting by diode D3 and resistance R3 when becoming large.Triode Q1 constant conduction, until again repeat said process when the voltage at divider resistance R1 two ends again diminishes in next cycle, so circulating thus obtaining the digital signal identical with the frequency that divider resistance R1 both end voltage changes inputs; Clamper amplification circuit plays the effect of signal amplification and circuit protection, makes whole testing circuit more stable.Detection results is better.
More than show and describe basic principle of the present utility model and major character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; what describe in above-described embodiment and specification just illustrates principle of the present utility model; under the prerequisite not departing from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
- DC fan clamping type testing circuit in 1.UPS power-supply system, it is characterized in that: comprise the fluctuation voltage detection circuit and signaling conversion circuit that connect successively, described fluctuation voltage detection circuit comprises divider resistance R1 and voltage-stabiliser tube D1, the D2 in parallel with described divider resistance R1, divider resistance R1 connects with DC fan FAN, voltage-stabiliser tube D1 one end ground connection, the other end is connected between diode D3 and DC fan FAN; Described signaling conversion circuit comprises triode Q1, metal-oxide-semiconductor T1, diode D3, electric capacity C1, electric capacity C2 and divider resistance R2, the base stage of triode Q1 is connected with one end of divider resistance R2 via electric capacity C1, the other end ground connection of described divider resistance R2, diode D3 is in parallel with electric capacity C1, the negative pole of diode D3 is connected to the contact of electric capacity C1 and triode Q1, the external DC fan FAN of positive pole of diode D3; Triode Q1 collector electrode is connected with the base stage of triode Q2 by resistance R8 by resistance R5 ABAP Adapter VCC, triode Q1 emitter; The grid of metal-oxide-semiconductor T1 is connected with the collector electrode of triode Q1 via electric capacity C2, and grid accesses power vd D simultaneously, the drain electrode output detections signal of metal-oxide-semiconductor T1, and source electrode is by resistance R7 ground connection, and the contact of electric capacity C2 and metal-oxide-semiconductor T1 is by resistance R9 ground connection; Be provided with clamper amplification circuit at the inter-collector of described electric capacity C2 and triode Q1, described clamper amplification circuit comprises operational amplifier U, metal-oxide-semiconductor T2 and resistance R3, R6, R7 and R8; The drain electrode of described metal-oxide-semiconductor T2 connects and accesses input voltage through resistance R6, the grid of metal-oxide-semiconductor T2 is connected with the output terminal out of operational amplifier U and resistance R3 one end, the source ground of metal-oxide-semiconductor T2, operational amplifier U reverse input end is connected with the tie point of resistance R7 one end and resistance R8, the tie point that the other end and electric capacity C2 and the metal-oxide-semiconductor T2 of resistance R7 drain is connected, resistance R8 the other end ground connection, the resistance R7 the other end drains with metal-oxide-semiconductor T2 and is connected, and as electrical signal.
- 2. DC fan clamping type testing circuit in ups power system according to claim 1, it is characterized in that: one end ground connection of described voltage-stabiliser tube D2, the other end is connected with the grounding end of resistance R2 and the positive pole of diode D3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420506045.1U CN204099254U (en) | 2014-09-04 | 2014-09-04 | DC fan clamping type testing circuit in ups power system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420506045.1U CN204099254U (en) | 2014-09-04 | 2014-09-04 | DC fan clamping type testing circuit in ups power system |
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| CN204099254U true CN204099254U (en) | 2015-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420506045.1U Expired - Fee Related CN204099254U (en) | 2014-09-04 | 2014-09-04 | DC fan clamping type testing circuit in ups power system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108131316A (en) * | 2017-11-30 | 2018-06-08 | 双钱集团（江苏）轮胎有限公司 | A kind of starting fan control loop |
| CN109212252A (en) * | 2017-06-30 | 2019-01-15 | 郑州宇通客车股份有限公司 | A kind of tach signal sampling processing circuit |
| CN114060298A (en) * | 2020-08-04 | 2022-02-18 | 广东美的环境电器制造有限公司 | Control circuit and method of electric fan |
-
2014
- 2014-09-04 CN CN201420506045.1U patent/CN204099254U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109212252A (en) * | 2017-06-30 | 2019-01-15 | 郑州宇通客车股份有限公司 | A kind of tach signal sampling processing circuit |
| CN109212252B (en) * | 2017-06-30 | 2024-04-19 | 宇通客车股份有限公司 | Rotational speed signal sampling processing circuit |
| CN108131316A (en) * | 2017-11-30 | 2018-06-08 | 双钱集团（江苏）轮胎有限公司 | A kind of starting fan control loop |
| CN114060298A (en) * | 2020-08-04 | 2022-02-18 | 广东美的环境电器制造有限公司 | Control circuit and method of electric fan |
| CN114060298B (en) * | 2020-08-04 | 2023-11-17 | 广东美的环境电器制造有限公司 | Control circuit and method of electric fan |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150114 Termination date: 20170904 |
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| CF01 | Termination of patent right due to non-payment of annual fee |