CN103841708A - Control circuit - Google Patents
Control circuit Download PDFInfo
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- CN103841708A CN103841708A CN201210489503.0A CN201210489503A CN103841708A CN 103841708 A CN103841708 A CN 103841708A CN 201210489503 A CN201210489503 A CN 201210489503A CN 103841708 A CN103841708 A CN 103841708A
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- control circuit
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
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Abstract
The embodiment of the invention discloses a control circuit. The control circuit comprises a rectifying unit connected between a positive electrode and a negative electrode of an alternating current power source and used for converting alternating current into direct current and supplying a work power source for the whole control circuit, a temperature measurement unit used for measuring the environment temperature and outputting different electric signals according to the change of the environment temperature and a control unit used for receiving the electric signals output by the temperature measurement unit and controlling the rotation speed of a motor connected with the control unit. By the adoption of the control circuit, the rotation speed of the motor can be adaptively changed according to the temperature of a lamp or the temperature of the surrounding environment and the good and efficient heat dissipation effect is achieved on the premise that electric power is saved.
Description
Technical field
The present invention relates to electronic technology field, relate in particular to a kind of control circuit.
Background technology
Need to use large-power lamp or need long-time use under light fixture or the scene of lamp applications in hot environment at some, the temperature of light fixture is larger, if keep for a long time the condition of high temperature that use safety and useful life to light fixture are affected greatly.
In prior art, the normal mode that adopts fan to accelerate Air Flow solves the heat dissipation problem of light fixture, but fan will maintain constant rotating speed, and in the time that light fixture just uses, temperature is lower, if now open fan cooling, and waste electric energy; And longer service time when light fixture, when temperature is higher, the constant wind speed of fan possibly cannot reach desirable radiating effect.
Summary of the invention
Embodiment of the present invention technical problem to be solved is, a kind of control circuit is provided.The rotating speed that can change according to the temperature self-adaptation of light fixture or surrounding enviroment motor provides good and efficient radiating effect under the prerequisite of saving electric energy.
In order to solve the problems of the technologies described above, the embodiment of the present invention provides a kind of control circuit, comprising:
Rectification unit, is connected between the both positive and negative polarity of AC power, for alternating current is converted to direct current, for whole control circuit provides working power;
Temperature measuring unit, exports the different signals of telecommunication for detection of ambient temperature and according to the variation of ambient temperature;
Control unit, for receiving the signal of telecommunication of described temperature measuring unit output, controls the rotating speed of the motor being connected with described control unit.
Wherein, described rectification unit comprises full-wave rectifying circuit, and the input a of described full-wave rectifying circuit connects AC power positive pole by the stator winding of motor, and input c connects AC power negative pole.
Wherein, described temperature measuring unit comprises at least one thermistor.
Wherein, described temperature measuring unit comprises 4 thermistors, and described 4 thermistors are in parallel again after connecting between two.
Wherein, described control unit comprises relaxation oscillator, the first transistor, divider resistance and controllable silicon; Described relaxation oscillator comprises transistor seconds, the first resistance and the first electric capacity; The base stage of transistor seconds described in a termination after described the first resistance and the first Capacitance parallel connection, the output d of rectification unit described in another termination; The emitter of described transistor seconds meets the output b of described rectification unit, and collector electrode meets the output d of described rectification unit by described divider resistance; The base stage of described the first transistor connects described temperature measuring unit, and collector electrode connects the common node of described the first resistance, the first electric capacity and transistor seconds base stage, and emitter meets the output b of described rectification unit; The common node of transistor seconds and described divider resistance described in described silicon controlled control termination, anode meets the output b of described rectification unit, and negative electrode meets the output d of described rectification unit.
Wherein, described the first transistor and transistor seconds are positive-negative-positive triode.
Wherein, described control circuit also comprises the first current-limiting resistance, and described the first current-limiting resistance is connected between the emitter of described transistor seconds and the output b of described rectification unit.
Wherein, described control circuit also comprises filter unit, and described filter unit is in parallel with described rectification unit.
Wherein, described filter unit comprises the second resistance and the second electric capacity, in parallel with described rectification unit after described the second resistance and the second capacitances in series.
Wherein, described control circuit also comprises adjustable resistance, and described adjustable resistance is connected between the base stage and emitter of described the first transistor.
Implement the embodiment of the present invention, there is following beneficial effect:
Utilize temperature measuring unit to detect the variations in temperature of light fixture or surrounding enviroment, and export the corresponding signal of telecommunication to control unit according to different temperature, control unit is according to the rotating speed of the rotating speed of corresponding control motor of the electrical signal and then control fan, can in the time of low temperature, reduce rotation speed of the fan, when high temperature, accelerate rotation speed of the fan, without manual operation, realize the self adaptation of light fixture or surrounding enviroment temperature is regulated, can save under the prerequisite of electric energy, play good radiating effect, whole circuit structure is simple, and cost is low, and control precision is high.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the circuit diagram of the first embodiment of control circuit of the present invention;
Fig. 2 is the circuit diagram of the second embodiment of control circuit of the present invention;
Fig. 3 is the circuit diagram of the 3rd embodiment of control circuit of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Referring to Fig. 1, is the circuit diagram of the first embodiment of control circuit of the present invention, and in the present embodiment, described control circuit comprises: rectification unit 10, temperature measuring unit 20 and control unit 30.
Described rectification unit 10 is connected between the both positive and negative polarity of AC power, for alternating current is converted to direct current, for whole control circuit provides working power;
Described temperature measuring unit 20 is exported the different signals of telecommunication for detection of ambient temperature and according to the variation of ambient temperature;
Described control unit 30, for receiving the signal of telecommunication of described temperature measuring unit output, is controlled the rotating speed of the motor being connected with described control unit.
Export the different signals of telecommunication and according to the rotating speed of different control motor of the electrical signal by testing environment temperature, can realize thus the rotating speed that changes fan according to the temperature self-adaptation of light fixture or surrounding enviroment, good and efficient radiating effect is provided, in the time that the temperature of light fixture or surrounding enviroment is lower, control motor speed slows down, the rotating speed of fan is corresponding slack-off, saves electric energy; In the time that the temperature of light fixture or surrounding enviroment is higher, to control motor speed and accelerate, corresponding the accelerating of rotating speed of fan, plays good radiating effect.
Referring to Fig. 2, is the circuit diagram of the second embodiment of control circuit of the present invention.In the present embodiment, described rectification unit 10 comprises full-wave rectifying circuit 11, and the input a of described full-wave rectifying circuit 11 connects AC power positive pole by the stator winding of motor, and input c connects AC power negative pole.Adopt full-wave rectifying circuit 11 as rectification unit 10, improved the efficiency of rectification, and rectified current is easy to smoothly.
Described temperature measuring unit 20 comprises at least one thermistor 21.
Described control unit 30 comprises relaxation oscillator, the first transistor 31, divider resistance 32 and controllable silicon 33; Described relaxation oscillator comprises transistor seconds 34, the first resistance 35 and the first electric capacity 36; The base stage of transistor seconds 34 described in a termination after described the first resistance 35 and the first electric capacity 36 are in parallel, the output d of full-wave rectifying circuit 11 described in another termination; The emitter of described transistor seconds 34 meets the output b of described full-wave rectifying circuit 11, and collector electrode meets the output d of described full-wave rectifying circuit 11 by described divider resistance; The base stage of described the first transistor 31 connects described thermistor 21, and collector electrode connects the common node of described the first resistance 35, the first electric capacity 36 and transistor seconds 34 base stages, and emitter meets the output b of described full-wave rectifying circuit 11; The common node of transistor seconds 34 and described divider resistance 32 described in the control termination of described controllable silicon 33, anode meets the output b of described full-wave rectifying circuit 11, and negative electrode meets the output d of described full-wave rectifying circuit 11.
Wherein, form relaxation oscillator by the first transistor 31, the first resistance 35 and the first electric capacity 36, be subject to the collector voltage control of transistor seconds 34 its cycle of oscillation.Described thermistor 21, as the temperature element of this circuit, is also the base biasing resistor of transistor seconds 34 simultaneously.Along with the variation of ambient temperature, also there is corresponding variation in the resistance of described thermistor 21 thereupon, thereby changed the base bias voltage of described transistor seconds 34, and the collector voltage of the transistor seconds 34 making changes.In the time that the temperature of light fixture or surrounding enviroment raises, the resistance of described thermistor 21 reduces, the base bias voltage that described transistor seconds 34 obtains reduces, its collector voltage raises, the charging rate of described the first electric capacity 36 accelerates, and the frequency of oscillation of relaxation oscillator also increases, the angle of flow reach of described controllable silicon 33, the voltage at motor two ends raises, and rotation speed of the fan is accelerated; In the time that the temperature of light fixture or surrounding enviroment reduces, it is large that the resistance of described thermistor 21 becomes, described transistor seconds 34 obtains base bias voltage and raises, its collector voltage reduces, the frequency of oscillation of relaxation oscillator also decreases, after the angle of flow of described controllable silicon 33, move, the lower voltage at motor two ends, the rotating speed of fan slows down.Both can reach thus the effect of rotation speed of the fan adaptive environment temperature.
Referring to Fig. 3, is the circuit diagram of the 3rd embodiment of control circuit of the present invention.In the present embodiment, described rectification unit is the full-wave rectifying circuit N that 4 diodes are connected to form, and the input a of described full-wave rectifying circuit N connects AC power positive pole by the stator winding of motor M, and input c connects AC power negative pole.Adopt full-wave rectifying circuit N as rectification unit, improved the efficiency of rectification, and rectified current is easy to smoothly.
Described temperature measuring unit comprises 4 thermistor R, in parallel again after described 4 thermistor R connect between two.Adopt such connected mode, although the resistance of whole temperature measuring unit does not change, the resistance of single thermistor R both changed slightly and can embody, and therefore can greatly improve the sensitivity of described temperature measuring unit.
Described control unit comprises relaxation oscillator, the first transistor VT1, divider resistance R2 and controllable silicon SCR; Described relaxation oscillator comprises transistor seconds VT2, the first resistance R 1 and the first capacitor C 1; The base stage of transistor seconds VT2 described in a termination after described the first resistance R 1 and the first capacitor C 1 are in parallel, the output d of full-wave rectifying circuit N described in another termination; The emitter of described transistor seconds VT2 meets the output b of described full-wave rectifying circuit N, and collector electrode meets the output d of described full-wave rectifying circuit N by described divider resistance R2; The base stage of described the first transistor VT1 connects after the series connection of 4 thermistors one end in parallel again, and collector electrode connects the common node of described the first resistance R 1, the first electric capacity R2 and transistor seconds VT2 base stage, and emitter meets the output b of described full-wave rectifying circuit N; The output d of full-wave rectifying circuit N described in another termination in parallel again after 4 thermistor R series connection, the common node of transistor seconds VT2 and described divider resistance R2 described in the control termination of described controllable silicon SCR, anode meets the output b of described full-wave rectifying circuit N, and negative electrode meets the output d of described full-wave rectifying circuit N.
Wherein, described the first transistor VT1 and transistor seconds VT2 are positive-negative-positive triode.Described control circuit also comprises the first current limliting electricity R3 and the second current-limiting resistance R4, described the first current-limiting resistance R3 is connected between the emitter of described transistor seconds VT2 and the output b of described full-wave rectifying circuit N, for the emitter current limliting of described transistor seconds VT2, described the second current-limiting resistance R4 is connected between described the first current-limiting resistance R3 and described full-wave rectifying circuit N, is whole control unit and temperature measuring unit current limliting.Described control circuit also comprises filter unit, and described filter unit is in parallel with described rectification unit.Described filter unit comprises the second resistance R 5 and the second capacitor C 2, in parallel with described rectification unit after described the second resistance R 5 and the second capacitor C 2 series connection.Described control circuit also comprises adjustable resistance RP, and described adjustable resistance RP is connected between the base stage and emitter of described the first transistor VT1.Adjustable resistance RP adds, the rotating speed that passes through the described adjustable resistance RP resistance of regulation and control and then control motor that can be artificial, and the condition setting that simultaneously also changes rotating speed for motor according to ambient temperature provides reference.
The control principle that this circuit is concrete and the second embodiment are basic identical, repeat no more herein.
By the description of above-described embodiment, the present invention has the following advantages:
Utilize temperature measuring unit to detect the variations in temperature of light fixture or surrounding enviroment, and export the corresponding signal of telecommunication to control unit according to different temperature, control unit is according to the rotating speed of the rotating speed of corresponding control motor of the electrical signal and then control fan, can in the time of low temperature, reduce rotation speed of the fan, when high temperature, accelerate rotation speed of the fan, without manual operation, realize the self adaptation of light fixture or surrounding enviroment temperature is regulated, can save under the prerequisite of electric energy, play good radiating effect, whole circuit structure is simple, and cost is low, and control precision is high.
One of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, can carry out the hardware that instruction is relevant by computer program to complete, described program can be stored in a computer read/write memory medium, this program, in the time carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above disclosed is only preferred embodiment of the present invention, certainly can not limit with this interest field of the present invention, and the equivalent variations of therefore doing according to the claims in the present invention, still belongs to the scope that the present invention is contained.
Claims (10)
1. a control circuit, is characterized in that, comprising:
Rectification unit, is connected between the both positive and negative polarity of AC power, for alternating current is converted to direct current, for whole control circuit provides working power;
Temperature measuring unit, exports the different signals of telecommunication for detection of ambient temperature and according to the variation of ambient temperature;
Control unit, for receiving the signal of telecommunication of described temperature measuring unit output, controls the rotating speed of the motor being connected with described control unit.
2. control circuit as claimed in claim 1, is characterized in that, described rectification unit comprises full-wave rectifying circuit, and the input a of described full-wave rectifying circuit connects AC power positive pole by the stator winding of motor, and input c connects AC power negative pole.
3. control circuit as claimed in claim 2, is characterized in that, described temperature measuring unit comprises at least one thermistor.
4. control circuit as claimed in claim 3, is characterized in that, described temperature measuring unit comprises 4 thermistors, and described 4 thermistors are in parallel again after connecting between two.
5. the control circuit as described in claim 1-4 any one, is characterized in that, described control unit comprises relaxation oscillator, the first transistor, divider resistance and controllable silicon; Described relaxation oscillator comprises transistor seconds, the first resistance and the first electric capacity; The base stage of transistor seconds described in a termination after described the first resistance and the first Capacitance parallel connection, the output d of rectification unit described in another termination; The emitter of described transistor seconds meets the output b of described rectification unit, and collector electrode meets the output d of described rectification unit by described divider resistance; The base stage of described the first transistor connects described temperature measuring unit, and collector electrode connects the common node of described the first resistance, the first electric capacity and transistor seconds base stage, and emitter meets the output b of described rectification unit; The common node of transistor seconds and described divider resistance described in described silicon controlled control termination, anode meets the output b of described rectification unit, and negative electrode meets the output d of described rectification unit.
6. control circuit as claimed in claim 5, is characterized in that, described the first transistor and transistor seconds are positive-negative-positive triode.
7. control circuit as claimed in claim 6, is characterized in that, described control circuit also comprises the first current-limiting resistance, and described the first current-limiting resistance is connected between the emitter of described transistor seconds and the output b of described rectification unit.
8. control circuit as claimed in claim 7, is characterized in that, described control circuit also comprises filter unit, and described filter unit is in parallel with described rectification unit.
9. control circuit as claimed in claim 8, is characterized in that, described filter unit comprises the second resistance and the second electric capacity, in parallel with described rectification unit after described the second resistance and the second capacitances in series.
10. control circuit as claimed in claim 9, is characterized in that, described control circuit also comprises adjustable resistance, and described adjustable resistance is connected between the base stage and emitter of described the first transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210489503.0A CN103841708B (en) | 2012-11-27 | 2012-11-27 | A kind of control circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210489503.0A CN103841708B (en) | 2012-11-27 | 2012-11-27 | A kind of control circuit |
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| CN103841708A true CN103841708A (en) | 2014-06-04 |
| CN103841708B CN103841708B (en) | 2016-03-30 |
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| CN201210489503.0A Active CN103841708B (en) | 2012-11-27 | 2012-11-27 | A kind of control circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104703355A (en) * | 2015-03-23 | 2015-06-10 | 沈阳北星仪表制造有限公司 | Closed-loop control LED power supply |
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| CN103841708B (en) | 2016-03-30 |
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