CN204553301U - A kind of ac fan multistep speed regulation circuit - Google Patents
A kind of ac fan multistep speed regulation circuit Download PDFInfo
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- CN204553301U CN204553301U CN201520174454.0U CN201520174454U CN204553301U CN 204553301 U CN204553301 U CN 204553301U CN 201520174454 U CN201520174454 U CN 201520174454U CN 204553301 U CN204553301 U CN 204553301U
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Abstract
A kind of ac fan multistep speed regulation circuit, relate to fan speed-regulating technical field, its circuit comprises temperature sensing circuit, pulse drive signal produces circuit, high frequency transformer circuit and bidirectional thyristor circuit, described bidirectional thyristor circuit comprises bidirectional thyristor, the input end that described temperature sensing circuit produces circuit with pulse drive signal is connected, the output terminal that described pulse drive signal produces circuit is connected with the input end of high frequency transformer circuit, two output terminals of described high frequency transformer are connected with one of them main electrode with the control pole of described bidirectional thyristor respectively, the described main electrode of described bidirectional thyristor is connected with ac fan, circuit of the present utility model can extend the working life of fan, reduce noise, reduce electricity consumption.
Description
Technical field
The utility model relates to fan speed-regulating technical field, particularly relates to a kind of ac fan multistep speed regulation circuit.
Background technique
Fan is a kind of electrical equipment for dispelling the heat, the faster radiating effect of the rotating speed of fan is better theoretically, but it is also larger to do the noise produced like this, if and fan still runs up when heat is less, the waste of electric energy will be caused, if do not carry out speed governing to fan, the long-time high speed operation of fan, not only affect the working life of fan, bring unnecessary noise problem, but also can electric energy be wasted.
Model utility content
The purpose of this utility model is avoid deficiency of the prior art and provide a kind of ac fan multistep speed regulation circuit, and this ac fan multistep speed regulation circuit can carry out speed governing to fan, and then extends the working life of fan, reduces noise, reduces electricity consumption.
The purpose of this utility model is achieved through the following technical solutions:
A kind of ac fan multistep speed regulation circuit is provided, comprise temperature sensing circuit, pulse drive signal produces circuit, high frequency transformer circuit and bidirectional thyristor circuit, described bidirectional thyristor circuit comprises bidirectional thyristor, the input end that described temperature sensing circuit produces circuit with pulse drive signal is connected, the output terminal that described pulse drive signal produces circuit is connected with the input end of high frequency transformer circuit, two output terminals of described high frequency transformer are connected with one of them main electrode with the control pole of described bidirectional thyristor respectively, the described main electrode of described bidirectional thyristor is connected with ac fan.
Described temperature sensing circuit is connected to thermistor R1 and the resistance R2 of the negative temperature coefficient between power supply VCC and ground after comprising series winding, the contact between described thermistor R1 and resistance R2 connects the input end that described pulse drive signal produces circuit.
It is that DSP controls module that described pulse drive signal produces circuit.
Described high frequency transformer circuit comprises resistance R3, resistance R4, resistance R5, resistance R7, resistance R8, field effect transistor Q1, diode D1 and high frequency transformer T, described thyristor is denoted as bidirectional thyristor SCR, described in one termination of resistance R7, described pulse drive signal produces the output terminal of circuit, one end of the other end connecting resistance R8 of resistance R7 and the grid of field effect transistor Q1, the other end of the drain electrode connecting resistance R8 of field effect transistor Q1 and 0V power supply, the source electrode of field effect transistor Q1 connects the positive pole of diode D1 and 2 pin of high frequency transformer T, 1 pin of high frequency transformer T connects the negative pole of+15V power supply and diode D1, one end of the 3 pin connecting resistance R3 of high frequency transformer T, one end of the other end connecting resistance R4 of resistance R3 and one end of resistance R5, the other end of the 4 pin connecting resistance R4 of high frequency transformer T and the T2 main electrode of described bidirectional thyristor SCR and the anode of ac fan FAN, the negative terminal of ac fan FAN meets civil power zero line N, the control pole G of bidirectional thyristor SCR described in another termination of resistance R5.
Described bidirectional thyristor circuit also comprises resistance R6 and electric capacity C1, one end of another main electrode T1 connecting resistance R6 of described bidirectional thyristor SCR and civil power live wire L, one end of another termination capacitor C1 of resistance R6, the main electrode T2 of another termination bidirectional thyristor SCR of electric capacity C1.
The beneficial effects of the utility model: the utility model comprises temperature sensing circuit, pulse drive signal produces circuit, high frequency transformer circuit and bidirectional thyristor circuit, described bidirectional thyristor circuit comprises bidirectional thyristor, the input end that described temperature sensing circuit produces circuit with pulse drive signal is connected, the output terminal that described pulse drive signal produces circuit is connected with the input end of high frequency transformer circuit, two output terminals of described high frequency transformer are connected with one of them main electrode with the control pole of described bidirectional thyristor respectively, the described main electrode of described bidirectional thyristor is connected with ac fan, the utility model is sent into pulse drive signal by the reflection temperature high-low voltage signal that temperature sensing circuit detects and is produced circuit, pulse drive signal produces circuit and exports corresponding pulse tremendously high frequency transformer circuit according to this temperature, bidirectional thyristor conducting is triggered after the isolation of high frequency transformer circuit, therefore, the pulse that can produce different Trigger Angle according to different temperature pulse drive signal generation circuits goes to drive bidirectional thyristor, and then the size of the alternating voltage of adjustment supply ac fan, final realization is to the control of ac fan rotating speed, the working life of fan can be extended, reduce noise, reduce electricity consumption.
Accompanying drawing explanation
Accompanying drawing is utilized to be described further model utility, but the embodiment in accompanying drawing does not form any restriction of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the following drawings.
Fig. 1 is the overall structure schematic diagram of a kind of ac fan multistep speed regulation circuit of the present utility model.
Embodiment
With the following Examples the utility model is further described.
A kind of ac fan multistep speed regulation circuit of the present embodiment, comprise temperature sensing circuit, pulse drive signal produces circuit, high frequency transformer circuit and bidirectional thyristor circuit, described bidirectional thyristor circuit comprises bidirectional thyristor, the input end that described temperature sensing circuit produces circuit with pulse drive signal is connected, the output terminal that described pulse drive signal produces circuit is connected with the input end of high frequency transformer circuit, two output terminals of described high frequency transformer are connected with one of them main electrode with the control pole of described bidirectional thyristor respectively, the described main electrode of described bidirectional thyristor is connected with ac fan.
The present embodiment is sent into pulse drive signal by the reflection temperature high-low voltage signal that temperature sensing circuit detects and is produced circuit, pulse drive signal produces circuit and exports corresponding pulse tremendously high frequency transformer circuit according to this temperature, bidirectional thyristor conducting is triggered after the isolation of high frequency transformer circuit, therefore, the pulse that can produce different Trigger Angle according to different temperature pulse drive signal generation circuits goes to drive bidirectional thyristor, and then the size of the alternating voltage of adjustment supply ac fan, final realization is to the control of ac fan rotating speed, the working life of fan can be extended, reduce noise, reduce electricity consumption.
Concrete, as shown in Figure 1, described temperature sensing circuit is connected to thermistor R1 and the resistance R2 of the negative temperature coefficient between power supply VCC and ground after comprising series winding, the contact between described thermistor R1 and resistance R2 connects the input end that described pulse drive signal produces circuit.
It is that DSP controls module that described pulse drive signal produces circuit.
Described high frequency transformer circuit comprises resistance R3, resistance R4, resistance R5, resistance R7, resistance R8, field effect transistor Q1, diode D1 and high frequency transformer T, described thyristor is denoted as bidirectional thyristor SCR, described in one termination of resistance R7, described pulse drive signal produces the output terminal of circuit, one end of the other end connecting resistance R8 of resistance R7 and the grid of field effect transistor Q1, the other end of the drain electrode connecting resistance R8 of field effect transistor Q1 and 0V power supply, the source electrode of field effect transistor Q1 connects the positive pole of diode D1 and 2 pin of high frequency transformer T, 1 pin of high frequency transformer T connects the negative pole of+15V power supply and diode D1, one end of the 3 pin connecting resistance R3 of high frequency transformer T, one end of the other end connecting resistance R4 of resistance R3 and one end of resistance R5, the other end of the 4 pin connecting resistance R4 of high frequency transformer T and the T2 main electrode of described bidirectional thyristor SCR and the anode of ac fan FAN, the negative terminal of ac fan FAN meets civil power zero line N, the control pole G of bidirectional thyristor SCR described in another termination of resistance R5.
Described bidirectional thyristor circuit also comprises resistance R6 and electric capacity C1, one end of another main electrode T1 connecting resistance R6 of described bidirectional thyristor SCR and civil power live wire L, one end of another termination capacitor C1 of resistance R6, the main electrode T2 of another termination bidirectional thyristor SCR of electric capacity C1.
The resistance of the thermistor R1 of negative temperature coefficient reduces along with the rising of temperature, generally be arranged on above radiator, for detecting radiator temperature, R2 is metal film resister, itself and thermistor R1 form temperature sensing circuit, DSP is sent by the voltage signal corresponding with temperature signal detected to control module, control module for DSP and judge temperature level, Q1 is field effect transistor, FAN is 220V ac fan, metal film resister R6 and electric capacity C1 forms RC absorbing circuit, the peak voltage produced during for absorbing bidirectional thyristor SCR switch, diode D1 is as field effect transistor Q1 peak voltage absorbing circuit, the peak voltage preventing field effect transistor Q1 from producing in drain electrode at shutdown moment punctures field effect transistor, civil power is 220V Ac, T is high frequency transformer, drive singal is by high frequency transformer isolation drive bidirectional thyristor SCR, SCR is bidirectional thyristor, two main electrodes are had to be respectively T1 and T2, control pole G, be equivalent to two unidirectional thyristor reverse parallel connections, but only have one to control pole.
Transformer T and field effect transistor Q1 forms SCR drive circuit, and bidirectional thyristor SCR forms Ac regulating circuit.
Bidirectional thyristor is the same with single-phase thyristor, all there is trigging control characteristic, but be very different, no matter that is to say the voltage being applied to two which kind of polarity of main electrode T1 and T2, pole applying trigger impulse is controlled as long as give, bidirectional thyristor conducting can be realized, because it can in any one direction conducting, so bidirectional thyristor is a kind of desirable alternating-current switch device.The same with unidirectional thyristor, the size by controlling Trigger Angle just can realize the pressure regulation of Ac, and power to the Ac of the different size of fan, when Trigger Angle is 0, output AC piezoelectric voltage is maximum.
The working principle of the circuit of the present embodiment is:
The reflection temperature high-low voltage signal detected when temperature detection module send DSP to control module, when DSP control module judges that temperature is t1, DSP controls module and sends driving pulse CNTL, bidirectional thyristor SCR conducting is triggered after high frequency transformer T isolates, now its Trigger Angle is A1, and A1 > 0, input 220V Ac is through the main electrode T1 of bidirectional thyristor SCR and T2 step-down, obtain the power supply voltage V1 of ac fan FAN, and V1 < 220VAC, rated operational voltage because of ac fan FAN is alternating current 220V, so now fan FAN rotating speed is slower.
The reflection temperature high-low voltage signal detected when temperature detection module send DSP to control module, when DSP control module judges that temperature is t2, and t2 > t1, DSP controls module and sends driving pulse CNTL, bidirectional thyristor SCR conducting is triggered after high frequency transformer T isolates, now its Trigger Angle is A2, and A1 > A2 > 0, input 220V Ac is through bidirectional thyristor main electrode T1 and T2 step-down, obtain the power supply voltage V2 of ac fan FAN, and V1 < V2 < 220VAC, so now ac fan FAN rotating speed is obviously accelerated.
The reflection temperature high-low voltage signal detected when temperature detection module send DSP to control module, when DSP control module judges that temperature is t3, and t3 > t2 > t1, DSP controls module and sends driving pulse CNTL, bidirectional thyristor SCR conducting is triggered after high frequency transformer T isolates, now its Trigger Angle is A3, and A3=0, the complete conducting of bidirectional thyristor SCR, input 220V Ac is applied directly to the feeder ear of ac fan FAN, now obtain the power supply voltage V3 of ac fan FAN, and V3=220VAC, so now fan FAN full-speed operation.
Finally should be noted that; above embodiment is only in order to illustrate the technical solution of the utility model; but not the restriction to the utility model protection domain; although done to explain to the utility model with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can modify to the technical solution of the utility model or equivalent replacement, and not depart from essence and the scope of technical solutions of the utility model.
Claims (5)
1. an ac fan multistep speed regulation circuit, it is characterized in that: comprise temperature sensing circuit, pulse drive signal produces circuit, high frequency transformer circuit and bidirectional thyristor circuit, described bidirectional thyristor circuit comprises bidirectional thyristor, the input end that described temperature sensing circuit produces circuit with pulse drive signal is connected, the output terminal that described pulse drive signal produces circuit is connected with the input end of high frequency transformer circuit, two output terminals of described high frequency transformer are connected with one of them main electrode with the control pole of described bidirectional thyristor respectively, the described main electrode of described bidirectional thyristor is connected with ac fan.
2. a kind of ac fan multistep speed regulation circuit as claimed in claim 1, it is characterized in that: described temperature sensing circuit is connected to thermistor R1 and the resistance R2 of the negative temperature coefficient between power supply VCC and ground after comprising series winding, the contact between described thermistor R1 and resistance R2 connects the input end that described pulse drive signal produces circuit.
3. a kind of ac fan multistep speed regulation circuit as claimed in claim 1, is characterized in that: it is that DSP controls module that described pulse drive signal produces circuit.
4. a kind of ac fan multistep speed regulation circuit as claimed in claim 1, it is characterized in that: described high frequency transformer circuit comprises resistance R3, resistance R4, resistance R5, resistance R7, resistance R8, field effect transistor Q1, diode D1 and high frequency transformer T, described thyristor is denoted as bidirectional thyristor SCR, described in one termination of resistance R7, described pulse drive signal produces the output terminal of circuit, one end of the other end connecting resistance R8 of resistance R7 and the grid of field effect transistor Q1, the other end of the drain electrode connecting resistance R8 of field effect transistor Q1 and 0V power supply, the source electrode of field effect transistor Q1 connects the positive pole of diode D1 and 2 pin of high frequency transformer T, 1 pin of high frequency transformer T connects the negative pole of+15V power supply and diode D1, one end of the 3 pin connecting resistance R3 of high frequency transformer T, one end of the other end connecting resistance R4 of resistance R3 and one end of resistance R5, the other end of the 4 pin connecting resistance R4 of high frequency transformer T and the T2 main electrode of described bidirectional thyristor SCR and the anode of ac fan FAN, the negative terminal of ac fan FAN meets civil power zero line N, the control pole G of bidirectional thyristor SCR described in another termination of resistance R5.
5. a kind of ac fan multistep speed regulation circuit as claimed in claim 4, it is characterized in that: described bidirectional thyristor circuit also comprises resistance R6 and electric capacity C1, one end of another main electrode T1 connecting resistance R6 of described bidirectional thyristor SCR and civil power live wire L, one end of another termination capacitor C1 of resistance R6, the main electrode T2 of another termination bidirectional thyristor SCR of electric capacity C1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520174454.0U CN204553301U (en) | 2015-03-26 | 2015-03-26 | A kind of ac fan multistep speed regulation circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520174454.0U CN204553301U (en) | 2015-03-26 | 2015-03-26 | A kind of ac fan multistep speed regulation circuit |
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| Publication Number | Publication Date |
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| CN204553301U true CN204553301U (en) | 2015-08-12 |
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| CN201520174454.0U Active CN204553301U (en) | 2015-03-26 | 2015-03-26 | A kind of ac fan multistep speed regulation circuit |
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| CN (1) | CN204553301U (en) |
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- 2015-03-26 CN CN201520174454.0U patent/CN204553301U/en active Active
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