CN203872041U - Circuit for controlling operation of fan and photovoltaic inverter with circuit - Google Patents
Circuit for controlling operation of fan and photovoltaic inverter with circuit Download PDFInfo
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- CN203872041U CN203872041U CN201420310984.9U CN201420310984U CN203872041U CN 203872041 U CN203872041 U CN 203872041U CN 201420310984 U CN201420310984 U CN 201420310984U CN 203872041 U CN203872041 U CN 203872041U
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- resistance
- fan
- triode
- circuit
- capacitor
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Emergency Protection Circuit Devices (AREA)
Abstract
The utility model discloses a circuit for controlling operation of a fan and a photovoltaic inverter with the circuit. The circuit for controlling operation of the fan comprises an optical coupler OP1, a triode Q38, an MOS tube Q39, a triode Q40, a resistor R265, a resistor R267, a resistor R268, a resistor R274, a resistor R275, a resistor R286, a resistor R287, a resistor R288, a resistor R289, a resistor R290, a capacitor C230, a capacitor C231, a capacitor C232 and a diode D86. An external control chip outputs a control signal to one end of the resistor R265 so as to control operation of the circuit. Thus, normal operation of the fan can be ensured, and the photovoltaic inverter with the circuit has advantages of small volume and work stability.
Description
Technical field
The utility model relates to heat dissipation technology field, more particularly, and particularly a kind of photovoltaic DC-to-AC converter of controlling the circuit of fan work and thering is this circuit.
Background technology
At present, for the photovoltaic DC-to-AC converter of middle low power, substantially all require IP65 classification of waterproof, make the ambient temperature to 45 DEG C of photovoltaic DC-to-AC converter in the time of work, even reach 60 DEG C, under condition due to the airtight and high temperature of photovoltaic DC-to-AC converter, work, heat dispersion just affects stability and the useful life of product greatly.
In the more scheme of prior art, taking into account reduce small product size and ensure stability again in the situation that, all selecting the form of fan cooling; Therefore, designing a kind of circuit that can accurately control fan work has and seems and be necessary very much.
Utility model content
The purpose of this utility model is to provide a kind of and can accurately controls the circuit of fan work and have the photovoltaic DC-to-AC converter of this circuit according to the output signal of control chip.
In order to achieve the above object, the technical solution adopted in the utility model is as follows:
A kind of circuit of controlling fan work, described fan is connected on a fan splicing ear, and this circuit comprises optocoupler OP1, triode Q38, metal-oxide-semiconductor Q39, triode Q40, resistance R 265, resistance R 267, resistance R 268, resistance R 274, resistance R 275, resistance R 286, resistance R 287, resistance R 288, resistance R 289, resistance R 290, capacitor C 230, capacitor C 231, capacitor C 232 and diode D86;
Wherein, the input anode of optocoupler OP1 is connected with a control chip by resistance R 265, its input minus earth, and its output collector electrode is connected with a fan power supply circuit, and its output emitter is connected with the base stage of triode Q38 by resistance R 267, the collector electrode of described triode Q38 is connected with fan power supply circuit, and its emitter is connected with the collector electrode of triode Q40, the grid of metal-oxide-semiconductor Q39 by resistance R 274, the grounded emitter of described triode Q40, its base stage is connected with the source electrode of metal-oxide-semiconductor Q39 by resistance R 286, and the drain electrode of described metal-oxide-semiconductor Q39 is connected with the 3rd end of fan splicing ear, described resistance R 268 is connected between the input anode and negative pole of optocoupler OP1, after described capacitor C 230 and resistance R 275 are parallel with one another, be connected between the base stage and ground of triode Q38, after described resistance R 287 and capacitor C 231 are parallel with one another, be connected between the collector electrode and ground of triode Q40, after described resistance R 288 and capacitor C 232 are parallel with one another, be connected between the base stage and ground of triode Q40, after described resistance R 289 and resistance R 290 are parallel with one another, be connected between the source electrode and ground of metal-oxide-semiconductor Q39, the anode of described diode D86 is connected with the 3rd end of fan splicing ear, the first end of described fan splicing ear is also connected with the output collector electrode of optocoupler OP1.
Preferably, described triode Q38 and triode Q40 are NPN type triode.
The utility model also provides a kind of photovoltaic DC-to-AC converter of the circuit with above-mentioned control fan work, comprise inverter body and be located at the intrinsic fan of inverter, described fan is connected on a fan splicing ear, and the circuit of described control fan work is also connected with fan splicing ear.
Compared with prior art, the utility model has the advantage of: the utility model outputs control signals to one of resistance R 265 by outside control chip and brings in the work of controlling this circuit, it can guarantee the normal work of fan, and the photovoltaic DC-to-AC converter that can make to have advantages of this circuit has the little and working stability of volume.
Brief description of the drawings
In order to be illustrated more clearly in the utility model embodiment 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 embodiment more of the present utility model, 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 circuit of control fan work described in the utility model.
Fig. 2 is the circuit diagram of control chip in the circuit of control fan work described in the utility model.
Fig. 3 is the circuit diagram of the circuit fan power circuit of control fan work described in the utility model.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described in detail, thereby so that advantage of the present utility model and feature can be easier to be it will be appreciated by those skilled in the art that, protection range of the present utility model is made to more explicit defining.
Embodiment mono-
Consult shown in Fig. 1, a kind of circuit of controlling fan work of the present embodiment, described fan is connected on a fan splicing ear, and this circuit comprises optocoupler OP1, triode Q38, metal-oxide-semiconductor Q39, triode Q40, resistance R 265, resistance R 267, resistance R 268, resistance R 274, resistance R 275, resistance R 286, resistance R 287, resistance R 288, resistance R 289, resistance R 290, capacitor C 230, capacitor C 231, capacitor C 232 and diode D86;
Wherein, the input anode of optocoupler OP1 is connected with a control chip (as shown in Figure 2) by resistance R 265, its input minus earth, its output collector electrode is connected with a fan power supply circuit (as shown in Figure 3), and its output emitter is connected with the base stage of triode Q38 by resistance R 267, the collector electrode of triode Q38 is connected with fan power supply circuit, and its emitter is connected with the collector electrode of triode Q40, the grid of metal-oxide-semiconductor Q39 by resistance R 274, the grounded emitter of triode Q40, its base stage is connected with the source electrode of metal-oxide-semiconductor Q39 by resistance R 286, and the drain electrode of metal-oxide-semiconductor Q39 is connected with the 3rd end of fan splicing ear J, resistance R 268 is connected between the input anode and negative pole of optocoupler OP1, after capacitor C 230 and resistance R 275 are parallel with one another, be connected between the base stage and ground of triode Q38, after resistance R 287 and capacitor C 231 are parallel with one another, be connected between the collector electrode and ground of triode Q40, after resistance R 288 and capacitor C 232 are parallel with one another, be connected between the base stage and ground of triode Q40, after resistance R 289 and resistance R 290 are parallel with one another, be connected between the source electrode and ground of metal-oxide-semiconductor Q39, the anode of diode D86 is connected with the 3rd end of fan splicing ear J, the first end of fan splicing ear J is also connected with the output collector electrode of optocoupler OP1.
As preferably, the triode Q38 in the present embodiment and triode Q40 are NPN type triode.
The principle of the circuit of the control fan work of the present embodiment is: control chip (as shown in Figure 2) give control fan work signal FAN_DUTY out to optocoupler OP1 time be +high level signal of 5V, or+square-wave signal of the certain frequency of 5V amplitude, resistance R 265 and resistance R 268 are mainly used in ensureing optocoupler OP1 is elementaryly operated in correct state, can be because of former thereby damage optocouplers such as overcurrents, because V_FAN is+12V voltage, in the time that FAN_DUTY is high level signal, optocoupler OP1 conducting, secondary conducting, + 12V voltage is by resistance R 265, resistance R 275 dividing potential drops, the base stage of triode Q38 obtains enough bias voltages, make triode Q38 conducting, have+the 12V of the E utmost point (emitter) voltage of triode Q38, obtain the enough voltage that can make the G utmost point (grid) of metal-oxide-semiconductor Q39 open by resistance R 274 and resistance R 287 dividing potential drops, make metal-oxide-semiconductor Q39 open-minded, resistance R 274 can play the effect of current limliting and can not damage metal-oxide-semiconductor Q39 and triode Q40 simultaneously.
Owing to adopting two fan splicing ears in the present embodiment, be fan splicing ear J1 and fan splicing ear J2, the wherein 1 pin wind-receiving fan positive source of J1,2 pin wind-receiving fan working signals detect pin, 3 pin wind-receiving fan power cathodes, when after metal-oxide-semiconductor Q39 conducting, whole circuit forms loop, and fan just can be started working.
The present embodiment has used the mode of hardware overcurrent protection for the protection of fan; due to marginal resistance R 289 and the resistance R 290 of having sealed in circuit; resistance R 289 and resistance R 290 can produce a voltage difference, and when fan short circuit or while exceeding operating current, voltage can be greater than a set point like this; triode Q40 conducting; the G utmost point of metal-oxide-semiconductor Q39 is pulled to ground, and metal-oxide-semiconductor Q39 turn-offs, and whole circuit disconnects; fan quits work, and has effectively protected fan.
Concrete, the resistance of resistance R 289 and resistance R 290 is calculated according to fan maximum operating currenbt etc., and in the time of fan work, electric current is multiplied by this resistance can obtain certain voltage, in the time that voltage exceedes certain magnitude of voltage, triode Q40 conducting, the G utmost point of metal-oxide-semiconductor Q39 is pulled to reference to ground SGND, and the G utmost point (grid) voltage is zero, metal-oxide-semiconductor Q39 turn-offs, the loop of fan work circuit 5 disconnects, and guarantees that fan can not damage because of overcurrent, has reduced loss.
Consult shown in Fig. 2, it is the circuit diagram of control chip in the present embodiment, and what this control chip adopted is that model is the dsp chip of TMS320F28335PGFA.
Consult shown in Fig. 3, it is the circuit diagram of the present embodiment fan power circuit, this circuit is according to the fan power supply circuit making of the power that number of fans needs, the present embodiment fan needs+12V voltage power supply, due to only have+15V, need chip U23 to carry out change into+12V of handle+15V, if having in practical application+12V power supply also can be directly received V_FAN+12V.
Embodiment bis-
The present embodiment also provides the photovoltaic DC-to-AC converter of the electric circuit constitute of the control fan work described in a kind of embodiment of having, it is characterized in that: comprise inverter body and be located at the intrinsic fan of inverter, it is upper that described fan is connected in a fan splicing ear J, and the circuit of described control fan work is also connected with fan splicing ear J.
Photovoltaic DC-to-AC converter after the circuit that has used the control fan work described in embodiment mono-, the control fan work that it can be accurate and stable, and can make photovoltaic DC-to-AC converter there is the little and working stability of volume.
Although described by reference to the accompanying drawings execution mode of the present utility model; but the patent owner can make various distortion or amendment within the scope of the appended claims; as long as be no more than the described protection range of claim of the present utility model, all should be within protection range of the present utility model.
Claims (3)
1. control the circuit of fan work for one kind, described fan is connected on a fan splicing ear, it is characterized in that: this circuit comprises optocoupler OP1, triode Q38, metal-oxide-semiconductor Q39, triode Q40, resistance R 265, resistance R 267, resistance R 268, resistance R 274, resistance R 275, resistance R 286, resistance R 287, resistance R 288, resistance R 289, resistance R 290, capacitor C 230, capacitor C 231, capacitor C 232 and diode D86;
Wherein, the input anode of optocoupler OP1 is connected with a control chip by resistance R 265, its input minus earth, and its output collector electrode is connected with a fan power supply circuit, and its output emitter is connected with the base stage of triode Q38 by resistance R 267, the collector electrode of described triode Q38 is connected with fan power supply circuit, and its emitter is connected with the collector electrode of triode Q40, the grid of metal-oxide-semiconductor Q39 by resistance R 274, the grounded emitter of described triode Q40, its base stage is connected with the source electrode of metal-oxide-semiconductor Q39 by resistance R 286, and the drain electrode of described metal-oxide-semiconductor Q39 is connected with the 3rd end of fan splicing ear, described resistance R 268 is connected between the input anode and negative pole of optocoupler OP1, after described capacitor C 230 and resistance R 275 are parallel with one another, be connected between the base stage and ground of triode Q38, after described resistance R 287 and capacitor C 231 are parallel with one another, be connected between the collector electrode and ground of triode Q40, after described resistance R 288 and capacitor C 232 are parallel with one another, be connected between the base stage and ground of triode Q40, after described resistance R 289 and resistance R 290 are parallel with one another, be connected between the source electrode and ground of metal-oxide-semiconductor Q39, the anode of described diode D86 is connected with the 3rd end of fan splicing ear, the first end of described fan splicing ear is also connected with the output collector electrode of optocoupler OP1.
2. the circuit of control fan work according to claim 1, is characterized in that: described triode Q38 and triode Q40 are NPN type triode.
3. one kind has the photovoltaic DC-to-AC converter of the circuit of the control fan work described in claim 1 or 2, it is characterized in that: comprise inverter body and be located at the intrinsic fan of inverter, it is upper that described fan is connected in a fan splicing ear J, and the circuit of described control fan work is also connected with fan splicing ear J.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420310984.9U CN203872041U (en) | 2014-06-11 | 2014-06-11 | Circuit for controlling operation of fan and photovoltaic inverter with circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420310984.9U CN203872041U (en) | 2014-06-11 | 2014-06-11 | Circuit for controlling operation of fan and photovoltaic inverter with circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203872041U true CN203872041U (en) | 2014-10-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420310984.9U Expired - Fee Related CN203872041U (en) | 2014-06-11 | 2014-06-11 | Circuit for controlling operation of fan and photovoltaic inverter with circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203872041U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273853A (en) * | 2019-05-28 | 2019-09-24 | 苏州伟创电气设备技术有限公司 | A kind of fan control circuitry and frequency converter |
-
2014
- 2014-06-11 CN CN201420310984.9U patent/CN203872041U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110273853A (en) * | 2019-05-28 | 2019-09-24 | 苏州伟创电气设备技术有限公司 | A kind of fan control circuitry and frequency converter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 510663 No. 17 Xiangshan Road, Science Town, Guangzhou hi tech Industrial Development Zone, Guangdong, China Patentee after: GUANGZHOU SANJING ELECTRIC CO., LTD. Address before: 510663 No. 17 Xiangshan Road, Science Town, Guangzhou hi tech Industrial Development Zone, Guangdong, China Patentee before: Guangzhou Sanjing Electric Co., Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141008 Termination date: 20170611 |