CN104235046A - Self-adapting air cooling controller of transformer - Google Patents
Self-adapting air cooling controller of transformer Download PDFInfo
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- CN104235046A CN104235046A CN201410415476.1A CN201410415476A CN104235046A CN 104235046 A CN104235046 A CN 104235046A CN 201410415476 A CN201410415476 A CN 201410415476A CN 104235046 A CN104235046 A CN 104235046A
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- operational amplifier
- phase
- controller
- phase proportion
- self
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Abstract
The invention discloses a self-adapting air cooling controller of a transformer. An external power supply of the controller is connected with a negative temperature coefficient thermistor; the negative temperature coefficient thermistor is connected with a first operational amplifier; the first operational amplifier is connected with a second operational amplifier. The negative temperature coefficient thermistor and the operational amplifiers are utilized to constitute a self-adapting controller, so that the rotation speed of a transformer fan is controlled, and when the temperature raises, the rotation speed is increased, so that heat dissipation is quickened; when the temperature decreases, the rotation speed is correspondingly reduced, so that the cooling mode of the transformer is optimized; and furthermore, resources are saved, the service lives of the transformer and the fan are prolonged. The self-adapting air cooling controller is only applicable to an air-cooled transformer and can be used for controlling the heat dissipation speed of the air-cooled transformer.
Description
Technical field
The invention belongs to air blast transformer technical field, particularly relate to a kind of self-adapting type transformer air-cooled controller.
Background technique
Summer high temperature season, because residential electricity consumption and industrial electricity increase, usually cause transformer load rate to increase, even heavily loaded, overload situations also occurs often.If heavy duty or overload occur transformer, the most directly harm can make transformer temperature rise, and has a strong impact on transformer working life.The type of cooling that transformer is conventional has oil, oil, forced oil-circulation (air-cooled and water-cooled), wherein air-cooled principle is exactly that radiator is with fan, oil natural flow in radiator, fan accelerates air fluxion strap and walks heat, also with regard to accelerating cooling.Tradition air cooling way does not add control to fan, can not reach and shoot the arrow at the target, also there is waste in some sense to resource.
Operational amplifier is an electronic integrated circuit including multistage amplifier circuit, and its input stage is differential amplifier circuit, has the ability of high input resistance and suppression zero shift.It is widely used, and different resistor wirings can form various control switch.Thermistor is a class of sensing element, is divided into positive temperature coefficient thermistor (PTC) and negative temperature coefficient thermistor (NTC) according to temperature coefficient difference.The typical feature of thermistor is to responsive to temperature, shows different resistance values at different temperature.Positive temperature coefficient thermistor (PTC) resistance value when temperature is higher is larger, and negative temperature coefficient thermistor (NTC) resistance value when temperature is higher is lower.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of self-adapting type transformer air-cooled controller, is intended to solve traditional air cooling way and does not add control to fan, can not reach and shoot the arrow at the target, in some sense resource also be existed to the problem of waste.
The embodiment of the present invention is achieved in that a kind of self-adapting type transformer air-cooled controller, and this self-adapting type transformer air-cooled controller comprises: controller ABAP Adapter, negative tempperature coefficient thermistor, the first operational amplifier, the second operational amplifier;
Controller ABAP Adapter is connected with negative tempperature coefficient thermistor, and negative tempperature coefficient thermistor connects the first operational amplifier, and the first operational amplifier connects the second operational amplifier.
Further, this self-adapting type transformer air-cooled controller is made up of two-stage calculation amplifier.
Further, first order operational amplifier input voltage and output voltage have following relation:
abbreviation obtains
Further, second level op-amp output voltage and input voltage close and are: u
f=-u
0, then
Self-adapting type transformer air-cooled controller provided by the invention, a self-adapting type controller is formed by using negative tempperature coefficient thermistor and operational amplifier, thus the rotational velocity of control transformer fan, make it reach rotating speed when the temperature increases and increase quickening heat radiation; Reduce rotating speed accordingly when the temperature decreases, thus optimize Cooling Methods of Transformers, economize on resources simultaneously, extend transformer and fan life.The present invention, by greatly improving the cooling effect of air blast transformer, especially can increase transformer life by accelerating cooling at summer high temperature, can reduce fan and export, economize on resources, extend fan life when low temperature period.
Accompanying drawing explanation
Fig. 1 is the self-adapting type transformer air-cooled controller architecture schematic diagram that the embodiment of the present invention provides;
In figure: 1, controller ABAP Adapter; 2, negative tempperature coefficient thermistor; 3, fixed resistance; 4, the first operational amplifier; 5, the second operational amplifier.
Embodiment
In order to make object of the present invention, technological scheme and advantage clearly understand, below in conjunction with embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Below in conjunction with drawings and the specific embodiments, application principle of the present invention is further described.
As shown in Figure 1, the self-adapting type transformer air-cooled controller of the embodiment of the present invention is primarily of controller ABAP Adapter 1, negative tempperature coefficient thermistor 2, resistance 3, first operational amplifier 4, second operational amplifier 5;
Negative tempperature coefficient thermistor 2 and two fixed value resistance 3 form the first anti-phase proportion operational amplifier with operational amplifier 3; Two fixed value resistance 3 form the second anti-phase proportion operational amplifier controller with operational amplifier 5; ABAP Adapter 1 is connected with negative tempperature coefficient thermistor 2, and negative tempperature coefficient thermistor 2 connects the first operational amplifier 4, first operational amplifier 4 and connects the second operational amplifier 5.
Adaptive controller is made up of two-stage calculation amplifier as seen from Figure 1;
Can be obtained by operational amplifier " empty disconnected ", " empty short " principle: i-≈ 0, V
-=V
+=0, then first order operational amplifier input voltage and output voltage have following relation:
abbreviation obtains
same principle can obtain second level op-amp output voltage and input voltage and close and be: u
f=-u
0, then
Negative tempperature coefficient thermistor R
rautomatically change along with the change of transformer temperature, temperature its value higher is less, then the input voltage u of radiator
flarger; Temperature its value lower is less, then the input voltage u of radiator
fless, thus reach the effect of adaptive control fan cooling speed.
Specific embodiments of the invention:
The negative tempperature coefficient thermistor R of the embodiment of the present invention
rwith two fixed value resistance R
1the first anti-phase proportion operational amplifier is formed with operational amplifier; Two fixed value resistance R
1form with operational amplifier second anti-phase proportion operational amplifier; Controller ABAP Adapter is standard power-frequency voltage, fixed value resistance R
1according to the thermistor resistance character selected, selection conventional, electric-resistance, determines that its size is probably 100k Ω; Concrete connecting means is: controller ABAP Adapter accesses the first anti-phase proportion operational amplifier input end, first anti-phase proportion operational amplifier output terminal is connected with the second anti-phase proportion operational amplifier input end, the output terminal access fan of the second anti-phase proportion operational amplifier.
This self-adapting type transformer air-cooled controller is made up of the anti-phase proportion operational amplifier of two-stage; After ABAP Adapter access, after the anti-phase proportion operational amplifier of the first order, voltage swing changes, and it is adaptively changing according to the resistance size of thermistor; Voltage-phase occurs anti-phase; After the anti-phase proportion operational amplifier in the second level, voltage-phase is again anti-phase, recovers original phase place; Namely the anti-phase proportion operational amplifier in the second level just plays the effect of phase inverter;
First order operational amplifier input voltage and output voltage have following relation:
abbreviation obtains
in formula: u
ibeing the first anti-phase proportion operational amplifier input voltage, is also controller input voltage; u
0it is the first anti-phase proportion operational amplifier output voltage; R
rfor negative tempperature coefficient thermistor, R
1for fixed value resistance.
Second level op-amp output voltage and input voltage close and are: u
f=-u
0, then
U in formula
fbeing the output voltage of the second anti-phase proportion operational amplifier, is also the output voltage of controller; u
0be the input voltage of the second anti-phase proportion operational amplifier, be also the output voltage of the first anti-phase proportion operational amplifier simultaneously; R
rfor negative tempperature coefficient thermistor, R
1for fixed value resistance.
Working principle of the present invention: by the control circuit by self-adapting type transformer air-cooled controller access transformer fan, thus reach the rotational velocity that its change along with temperature controls radiator fan automatically.Easy to use, principle is simple, effectively can optimize air cooling effect, saves related resource.
The present invention is directed to air blast transformer, by using thermistor and operational amplifier to form a self-adapting type controller, thus the rotational velocity of control transformer fan, make it reach rotating speed when the temperature increases and increase quickening heat radiation; Reduce rotating speed accordingly when the temperature decreases, thus optimize Cooling Methods of Transformers, economize on resources simultaneously, increase transformer and fan life.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. a self-adapting type transformer air-cooled controller, is characterized in that, this self-adapting type transformer air-cooled controller comprises: negative tempperature coefficient thermistor R
rwith two fixed value resistance R
1the first anti-phase proportion operational amplifier is formed with operational amplifier; Two fixed value resistance R
1form with operational amplifier second anti-phase proportion operational amplifier; Controller ABAP Adapter is standard power-frequency voltage, fixed value resistance R
1according to the thermistor resistance character selected, selection conventional, electric-resistance, determines that its size is probably 100k Ω; Concrete connecting means is: controller ABAP Adapter accesses the first anti-phase proportion operational amplifier input end, first anti-phase proportion operational amplifier output terminal is connected with the second anti-phase proportion operational amplifier input end, the output terminal access fan of the second anti-phase proportion operational amplifier.
2. self-adapting type transformer air-cooled controller as claimed in claim 1, it is characterized in that, this self-adapting type transformer air-cooled controller is made up of the anti-phase proportion operational amplifier of two-stage; After ABAP Adapter access, after the anti-phase proportion operational amplifier of the first order, voltage swing changes, and it is adaptively changing according to the resistance size of thermistor; Voltage-phase occurs anti-phase; After the anti-phase proportion operational amplifier in the second level, voltage-phase is again anti-phase, recovers original phase place; Namely the anti-phase proportion operational amplifier in the second level just plays the effect of phase inverter.
3. self-adapting type transformer air-cooled controller as claimed in claim 2, it is characterized in that, first order operational amplifier input voltage and output voltage have following relation:
abbreviation obtains
in formula: u
ibeing the first anti-phase proportion operational amplifier input voltage, is also controller input voltage; u
0it is the first anti-phase proportion operational amplifier output voltage; R
rfor negative tempperature coefficient thermistor, R
1for fixed value resistance.
4. self-adapting type transformer air-cooled controller as claimed in claim 2, it is characterized in that, second level op-amp output voltage and input voltage close and are: u
f=-u
0, then
U in formula
fbeing the output voltage of the second anti-phase proportion operational amplifier, is also the output voltage of controller; u
0be the input voltage of the second anti-phase proportion operational amplifier, be also the output voltage of the first anti-phase proportion operational amplifier simultaneously; R
rfor negative tempperature coefficient thermistor, R
1for fixed value resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410415476.1A CN104235046A (en) | 2014-08-21 | 2014-08-21 | Self-adapting air cooling controller of transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410415476.1A CN104235046A (en) | 2014-08-21 | 2014-08-21 | Self-adapting air cooling controller of transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104235046A true CN104235046A (en) | 2014-12-24 |
Family
ID=52223772
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410415476.1A Pending CN104235046A (en) | 2014-08-21 | 2014-08-21 | Self-adapting air cooling controller of transformer |
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|---|---|
| CN (1) | CN104235046A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104533823A (en) * | 2014-12-29 | 2015-04-22 | 广东威创视讯科技股份有限公司 | Temperature-control rotating speed control device of direct-current fan |
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| CN103414225A (en) * | 2013-08-14 | 2013-11-27 | 山东润峰电子科技有限公司 | Electric vehicle charger with temperature-control fan |
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2014
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| US4459519A (en) * | 1974-06-24 | 1984-07-10 | General Electric Company | Electronically commutated motor systems and control therefor |
| US5010223A (en) * | 1988-05-31 | 1991-04-23 | Sang Wook Suh International | Output control circuit of a 4-burner electronics induction heating cook system and a control method thereof |
| CN2089542U (en) * | 1991-06-01 | 1991-11-27 | 凌云 | Temp. controlled speed adjusting device of electric fan |
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| US5910743A (en) * | 1997-07-03 | 1999-06-08 | Power System Management, Inc. | High efficiency pulse width modulator |
| CN1282009A (en) * | 1999-07-26 | 2001-01-31 | 神基科技股份有限公司 | Double-fan radiation device |
| CN101494437A (en) * | 2008-01-23 | 2009-07-29 | 罗姆股份有限公司 | Motor driving apparatus, motor driving method and cooling apparatus using the same |
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|---|
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| CN104533823A (en) * | 2014-12-29 | 2015-04-22 | 广东威创视讯科技股份有限公司 | Temperature-control rotating speed control device of direct-current fan |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 300010 Tianjin city Hebei District Wujing Road No. 39 Applicant after: State Grid Corporation of China Applicant after: State Grid Tianjin Wuqing Power Supply Co., Ltd. Address before: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Applicant before: State Grid Corporation of China Applicant before: State Grid Tianjin Wuqing Power Supply Co., Ltd. |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20141224 |
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| RJ01 | Rejection of invention patent application after publication |