CN205117778U - Adjustable fan speed's uninterrupted power source - Google Patents
Adjustable fan speed's uninterrupted power source Download PDFInfo
- Publication number
- CN205117778U CN205117778U CN201520806036.9U CN201520806036U CN205117778U CN 205117778 U CN205117778 U CN 205117778U CN 201520806036 U CN201520806036 U CN 201520806036U CN 205117778 U CN205117778 U CN 205117778U
- Authority
- CN
- China
- Prior art keywords
- circuit
- current
- comparator
- fan
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The utility model discloses an adjustable fan speed's uninterrupted power source includes the fan speed regulating circuit, the input termination of fan speed regulating circuit is between dc -to -ac converter and load, the output of the fan speed regulating circuit fan of giving a dinner for a visitor from afar, the fan speed regulating circuit includes that load voltage acquires the circuit, a comparator, reference voltage generating circuit, the current -limiting circuit with be used for the switch tube circuit with the current -limiting circuit short circuit, load voltage acquires the circuit and inputs the load real - time voltage who acquires to the first input end of comparator, the reference voltage that reference voltage generating circuit generated inputs to the second input of comparator, the output of comparator is the break -make of control switch pipe circuit as a result, switch tube circuit conduction then the current -limiting circuit by the short circuit, the power is supplied power for the fan through the switch tube circuit, the switch tube circuit does not switch on then current -limiting circuit work, the power is supplied power for the fan after the current -limiting circuit current -limiting again, the circuit is simple, low cost.
Description
Technical field
The utility model relates to a kind of uninterruptable power source, particularly a kind of uninterruptable power source of adjustable fan rotating speed.
Background technique
Uninterruptable power source is all adopt ac fan or DC fan to carry out forced air cooling to the power device of power supply usually, there are two kinds of ways at present: a kind of is directly to a fixing power supply, the rotating speed of fan can not get regulating, and causes the operation noise of power supply to increase; Another delivers to dsp chip by sample temperature, then send out a drive singal to control the rotating speed of radiation fan by dsp chip, and circuit is complicated and cost is high.
Summary of the invention
The purpose of this utility model is the defect existed to solve prior art, and provides a kind of uninterruptable power source of adjustable fan rotating speed, and the rotation speed of the fan regulating circuit of this uninterruptable power source is simple, and cost is low.
Provide the technical solution of the utility model for this reason.
A kind of uninterruptable power source of adjustable fan rotating speed, comprise rotation speed of the fan regulating circuit, it is characterized in that: the input end of rotation speed of the fan regulating circuit is connected between inverter and load, the output terminal wind-receiving fan of rotation speed of the fan regulating circuit, rotation speed of the fan regulating circuit comprises load voltage acquisition cuicuit, comparator, reference voltage generating circuit, current-limiting circuit and for the switching tube circuit by current-limiting circuit short circuit, the load real-time voltage of acquisition is inputed to the first input end of comparator by load voltage acquisition cuicuit, the reference potential that reference voltage generating circuit generates inputs to the second input end of comparator, the break-make of the Output rusults control switch pipe circuit of comparator, switching tube circuit turn-on then current-limiting circuit by short circuit, power supply is that fan is powered through switching tube circuit, switching tube circuit not conducting then current-limiting circuit work, power supply after current-limiting circuit current limliting again for fan is powered.
Load voltage acquisition cuicuit comprises load current acquisition cuicuit, rectification circuit and bleeder circuit, and load current acquisition cuicuit obtains the electric current of load, exports the first input end of comparator after rectifier circuit rectifies and bleeder circuit dividing potential drop to.
Load current acquisition cuicuit is current transformer, and rectification circuit is set to rectifier bridge, and bleeder circuit comprises the first resistance and the second resistance.
Load voltage acquisition cuicuit also comprises voltage follower, and the output terminal of bleeder circuit is connected with the input end of voltage follower, and the output terminal of voltage follower is connected with the first input end of comparator through the 3rd resistance.
The input end of voltage follower is through the first capacity earth.
The reference voltage generating circuit of comparator comprises voltage VCC, the 4th resistance and the 5th resistance, and power supply VCC inputs to the second input end of comparator after the 4th resistance and the 5th electric resistance partial pressure.
For the switching tube circuit of current-limiting circuit short circuit is comprised the 6th resistance, the 7th resistance and field effect transistor, 6th resistance is connected between the output terminal of comparator and the grid of field effect transistor, 7th resistance is connected between the grid of field effect transistor and source electrode, the source ground of field effect transistor, the drain electrode of field effect transistor is connected with one end of fan, another termination power VCC of fan.
Current-limiting circuit is connected between the source electrode of field effect transistor and drain electrode.
Power supply VCC is through the 3rd capacity earth.
Current-limiting circuit comprises the 8th resistance in parallel and the 9th resistance.
The beneficial effects of the utility model: the utility model obtains the real-time voltage of load by load voltage acquisition cuicuit, reference potential is set by reference voltage generating circuit, comparator compares the real-time voltage of load and the reference potential of setting, the break-make of the Output rusults control switch pipe circuit of comparator, switching tube circuit turn-on then current-limiting circuit by short circuit, power supply is that fan is powered through switching tube circuit, switching tube circuit not conducting then current-limiting circuit work, power supply after current-limiting circuit current limliting again for fan is powered, compared with prior art, owing to not needing to use dsp chip, circuit is simple, cost is low.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of the uninterruptable power source of a kind of adjustable fan rotating speed of the present utility model.
Embodiment
The uninterruptable power source of a kind of adjustable fan rotating speed of the present embodiment, comprise rotation speed of the fan regulating circuit, the input end of rotation speed of the fan regulating circuit is connected between inverter and load, the output terminal wind-receiving fan of rotation speed of the fan regulating circuit, rotation speed of the fan regulating circuit comprises load voltage acquisition cuicuit, comparator, reference voltage generating circuit, current-limiting circuit and for the switching tube circuit by current-limiting circuit short circuit, the load real-time voltage of acquisition is inputed to the first input end of comparator by load voltage acquisition cuicuit, the reference potential that reference voltage generating circuit generates inputs to the second input end of comparator, the break-make of the Output rusults control switch pipe circuit of comparator, switching tube circuit turn-on then current-limiting circuit by short circuit, power supply is that fan is powered through switching tube circuit, switching tube circuit not conducting then current-limiting circuit work, power supply after current-limiting circuit current limliting again for fan is powered, compared with prior art, owing to not needing to use dsp chip, circuit is simple, cost is low.
Load voltage acquisition cuicuit comprises load current acquisition cuicuit, rectification circuit and bleeder circuit, and load current acquisition cuicuit obtains the electric current of load, exports the first input end of comparator after rectifier circuit rectifies and bleeder circuit dividing potential drop to.
As shown in Figure 1, load current acquisition cuicuit is Current Transmit 1, and rectification circuit is set to rectifier bridge D1, and bleeder circuit comprises the first resistance R1 and the second resistance R2.
Load voltage acquisition cuicuit also comprises voltage follower U1, the output terminal of bleeder circuit is connected with the input end of voltage follower U1, the output terminal of voltage follower U1 is connected with the first input end of comparator U2 through the 3rd resistance, and voltage follower U1 plays buffering, isolation and improves load capacity.
The input end of voltage follower U1, through the first electric capacity C1 ground connection, can be the power supply that voltage follower U1 provides purer.
The power supply VCC of voltage follower U1, through the second electric capacity C2 ground connection, can be the power supply that comparator U2 provides purer.
The reference voltage generating circuit of comparator U2 comprises voltage VCC, the 4th resistance R4 and the 5th resistance R5, power supply VCC are connected with second input end of comparator U2 after the 5th resistance R5 dividing potential drop through the 4th resistance R4, and structure is simple, and cost is low.
For the switching tube circuit of current-limiting circuit short circuit is comprised the 6th resistance R6, the 7th resistance R7 and field effect transistor Q1,6th resistance R6 is connected between the output terminal of comparator U2 and the grid of field effect transistor Q1, between the grid that 7th resistance R7 is connected to field effect transistor Q1 and source electrode, the source ground of field effect transistor Q1, the drain electrode of field effect transistor Q1 is connected with one end of fan, another termination power VCC of fan, structure is simple, and cost is low.
Current-limiting circuit is connected between the source electrode of field effect transistor Q1 and drain electrode, in parallel with field effect transistor, is selected a use.
Power supply VCC, through the 3rd electric capacity C3 ground connection, can be the power supply that fan provides more pure.
Current-limiting circuit comprises the 8th resistance R8 in parallel and the 9th resistance R9, and the quantity of resistance and resistance can be selected according to actual needs.
The working principle of the present embodiment is as follows:
The electric current of inverter outlet side is gathered by Current Transmit 1, the size of the electric current that Current Transmit 1 is flow through by former limit, the voltage that secondary is come by flux of magnetic induction is by rectifier bridge D1 rectification, the input end of voltage follower U1 is added to again through resistance R1 and R2 dividing potential drop, power supply VCC is added to the input negative terminal of comparator U2 by resistance R3 and resistance R4 dividing potential drop, as the reference potential reference point of comparator U2, the current set point of fan speed-regulating can change the reference potential of comparator U2 by resistance R3 and R4 dividing potential drop, the input anode of comparator U2 is received in the output of voltage follower U1 by resistance R5, when input anode voltage higher than input negative terminal reference potential time, the output of comparator U2 is high level, the grid of field effect transistor Q1 is added to by resistance R6, field effect transistor Q1 conducting, by current-limiting resistance R8 and R9 short circuit, fan accelerated service.
When the load of the outlet side of inverter is less, the voltage that the input anode of comparator U2 samples is lower than the reference potential of input negative terminal, the output of comparator U2 is low level, field effect transistor Q1 not conducting, power supply VCC passes through fan, again through current-limiting resistance R8 and R9 current limliting, the motion speed of fan is slowed down.
The present embodiment is when inverter is when outlet side load is less, reduce the rotating speed of fan, also reduce the operation noise of uninterruptable power source simultaneously, when the outlet side load of inverter is greater than 50% of uninterruptable power source nominal capacity, by detecting the electric current of the outlet side of inverter, accelerating the running speed of fan, ensureing the heat radiation quality of power device, circuit is simple, and operation stability is high.
Claims (10)
1. the uninterruptable power source of an adjustable fan rotating speed, comprise rotation speed of the fan regulating circuit, it is characterized in that: the input end of rotation speed of the fan regulating circuit is connected between inverter and load, the output terminal wind-receiving fan of rotation speed of the fan regulating circuit, rotation speed of the fan regulating circuit comprises load voltage acquisition cuicuit, comparator, reference voltage generating circuit, current-limiting circuit and for the switching tube circuit by current-limiting circuit short circuit, the load real-time voltage of acquisition is inputed to the first input end of comparator by load voltage acquisition cuicuit, the reference potential that reference voltage generating circuit generates inputs to the second input end of comparator, the break-make of the Output rusults control switch pipe circuit of comparator, switching tube circuit turn-on then current-limiting circuit by short circuit, power supply is that fan is powered through switching tube circuit, switching tube circuit not conducting then current-limiting circuit work, power supply after current-limiting circuit current limliting again for fan is powered.
2. the uninterruptable power source of a kind of adjustable fan rotating speed according to claim 1, it is characterized in that, load voltage acquisition cuicuit comprises load current acquisition cuicuit, rectification circuit and bleeder circuit, load current acquisition cuicuit obtains the electric current of load, exports the first input end of comparator after rectifier circuit rectifies and bleeder circuit dividing potential drop to.
3. the uninterruptable power source of a kind of adjustable fan rotating speed according to claim 2, is characterized in that, load current acquisition cuicuit is current transformer.
4. the uninterruptable power source of a kind of adjustable fan rotating speed according to claim 2, it is characterized in that, load voltage acquisition cuicuit also comprises voltage follower, the output terminal of bleeder circuit is connected with the input end of voltage follower, and the output terminal of voltage follower is connected with the first input end of comparator through the 3rd resistance.
5. the uninterruptable power source of a kind of adjustable fan rotating speed according to claim 4, is characterized in that, the input end of voltage follower is through the first capacity earth.
6. the uninterruptable power source of a kind of adjustable fan rotating speed according to claim 4, it is characterized in that, the reference voltage generating circuit of comparator comprises voltage VCC, the 4th resistance and the 5th resistance, and power supply VCC inputs to the second input end of comparator after the 4th resistance and the 5th electric resistance partial pressure.
7. the uninterruptable power source of a kind of adjustable fan rotating speed according to claim 1, it is characterized in that, for the switching tube circuit of current-limiting circuit short circuit is comprised the 6th resistance, the 7th resistance and field effect transistor, 6th resistance is connected between the output terminal of comparator and the grid of field effect transistor, 7th resistance is connected between the grid of field effect transistor and source electrode, the source ground of field effect transistor, the drain electrode of field effect transistor is connected with one end of fan, another termination power VCC of fan.
8. the uninterruptable power source of a kind of adjustable fan rotating speed according to claim 7, is characterized in that, current-limiting circuit is connected between the source electrode of field effect transistor and drain electrode.
9. the uninterruptable power source of a kind of adjustable fan rotating speed according to claim 7, is characterized in that, power supply VCC is through the 3rd capacity earth.
10. the uninterruptable power source of a kind of adjustable fan rotating speed according to claim 1, is characterized in that, current-limiting circuit comprises the 8th resistance in parallel and the 9th resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520806036.9U CN205117778U (en) | 2015-10-19 | 2015-10-19 | Adjustable fan speed's uninterrupted power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520806036.9U CN205117778U (en) | 2015-10-19 | 2015-10-19 | Adjustable fan speed's uninterrupted power source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205117778U true CN205117778U (en) | 2016-03-30 |
Family
ID=55573393
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520806036.9U Active CN205117778U (en) | 2015-10-19 | 2015-10-19 | Adjustable fan speed's uninterrupted power source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205117778U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110401202A (en) * | 2019-08-22 | 2019-11-01 | 国网天津市电力公司 | Rural power grids low-voltage lifting device |
| CN110425174A (en) * | 2019-07-24 | 2019-11-08 | 许继电源有限公司 | Fan speed regulating circuit, multi-channel parallel fan speed regulating circuit |
-
2015
- 2015-10-19 CN CN201520806036.9U patent/CN205117778U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110425174A (en) * | 2019-07-24 | 2019-11-08 | 许继电源有限公司 | Fan speed regulating circuit, multi-channel parallel fan speed regulating circuit |
| CN110401202A (en) * | 2019-08-22 | 2019-11-01 | 国网天津市电力公司 | Rural power grids low-voltage lifting device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204217167U (en) | Single live wire touches lamp control switch | |
| CA2905234C (en) | High voltage direct current (hvdc) converter system and method of operating the same | |
| CN205117778U (en) | Adjustable fan speed's uninterrupted power source | |
| CN208849663U (en) | Protection circuit of inverter and servosystem | |
| TWI456620B (en) | Power apparatus of x-ray tube, power system with the power apparatus, and method of operating the same | |
| CN103826362A (en) | LED drive circuit and control method thereof | |
| CN104270005A (en) | Power supply circuit of fan | |
| CN103166568A (en) | Pulse-width modulation (PWM) alternating current (AC) variable frequency speed regulating master control circuit | |
| CN203595750U (en) | Zero-cross detection circuit for alternating-current power supply of gas water heater | |
| CN108599601B (en) | Synchronous transformer-implemented isolated passive self-driven optocoupler three-phase synchronous rectification circuit and method thereof | |
| CN203081821U (en) | Alternating-current fan frequency conversion speed regulation apparatus | |
| CN206341152U (en) | A kind of output synchronous commutation self-driving circuit of positive activation type Switching Power Supply | |
| CN105471342A (en) | Rapid de-excitation apparatus and method for rod control generator for nuclear power plant | |
| CN201893711U (en) | Multi-output regulated power supply | |
| CN204538964U (en) | A kind of Switching Power Supply of wide-voltage range | |
| CN205750611U (en) | A kind of regulator control circuit | |
| CN204903739U (en) | A alternating load device for uninterrupted power source uses | |
| CN104038137A (en) | Frequency-variable control device for reciprocating type submersible linear motor | |
| CN204270773U (en) | A kind of high thrust low-temperature-rise no-noise AC electromagnet | |
| CN208836002U (en) | A kind of high-power adjustable constant voltage driving power | |
| CN203801108U (en) | LED drive circuit | |
| CN205622531U (en) | A power supply unit that is used for 10KV to join in marriage intelligence switch controller of net | |
| CN202398925U (en) | 110 V non-multivoltage rectifying miniature welding and cutting machine circuit | |
| CN212305169U (en) | DC power supply for energy consumption braking | |
| CN103916024B (en) | UPS system with high efficiency |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |