CN108322068B - Air conditioner protection circuit powered by direct-current switch power supply - Google Patents
Air conditioner protection circuit powered by direct-current switch power supply Download PDFInfo
- Publication number
- CN108322068B CN108322068B CN201810266831.1A CN201810266831A CN108322068B CN 108322068 B CN108322068 B CN 108322068B CN 201810266831 A CN201810266831 A CN 201810266831A CN 108322068 B CN108322068 B CN 108322068B
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- Prior art keywords
- transformer
- air conditioner
- power supply
- protection circuit
- conditioner protection
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- 238000012360 testing method Methods 0.000 claims abstract description 18
- 239000003990 capacitor Substances 0.000 claims abstract description 13
- 238000004146 energy storage Methods 0.000 claims abstract description 7
- 238000013461 design Methods 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- 230000009466 transformation Effects 0.000 abstract description 2
- 238000004378 air conditioning Methods 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/217—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
The invention discloses an air conditioner protection circuit powered by a direct current switch power supply, which belongs to the technical field of air conditioner protection circuits, and particularly relates to an air conditioner protection circuit powered by a direct current switch power supply, comprising a voltage input end V0, wherein a primary coil of a transformer T is connected in series between two groups of connecting posts of the voltage input end V0, a switch tube V and an inductor L are connected in series on the upper side of a secondary coil of the transformer T through a wire, a freewheeling diode Vd, an energy storage capacitor C and a load Rl are connected in parallel between two groups of connecting posts of the secondary coil of the transformer T, a test resistor Rc is connected in series on the lower side of the secondary coil of the transformer T through a wire, the air conditioner protection circuit powered by the direct current switch power supply regulates and controls the output voltage of the circuit through the design of adjustable transformation, sample acquisition is carried out on the output circuit through the test resistor Rc connected in series, and the comparison result is taken as a comparison basis for debugging, and the output voltage is acquired and regulated in real time.
Description
Technical Field
The invention relates to the technical field of air conditioner protection circuits, in particular to an air conditioner protection circuit powered by a direct current switching power supply.
Background
How to effectively reduce power consumption is an increasingly important research topic in the field of electrical automation. In the air conditioning industry, a general air conditioning power supply mode is a mode of supplying power to an alternating current transformer, and the main defects of the power supply mode are that the transformer is low in efficiency, high in loss, unfavorable for reducing the power consumption of the whole machine and the like. Compared with the power supply of an alternating-current transformer, the power supply mode of the direct-current switch power supply has the advantages of high efficiency, large current supply, perfect protection function and the like. Therefore, the air conditioning industry has gradually begun to adopt the mode of direct current switching power supply to supply power for the air conditioner.
The original direct current switch power supply is difficult to control the voltage stability of an output end, and is easy to cause unstable output voltage and even influence the normal use of an electric device.
Disclosure of Invention
The invention aims to provide an air conditioner protection circuit powered by a direct current switching power supply, which solves the problems that the voltage stability of an output end of the original direct current switching power supply provided in the background art is difficult to control, the output voltage is easy to be unstable, and even the normal use of an electric device is influenced.
In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides an air conditioner protection circuit of direct current switching power supply, includes voltage input V0, establish ties with transformer T's primary coil between two sets of terminal connection of voltage input V0, transformer T's secondary coil's upside has switch tube V and inductance L through the wire series connection, connect in parallel between transformer T's secondary coil's two sets of terminal connection has freewheel diode Vd, storage capacitor C and load Rl, transformer T's secondary coil's downside has test resistance Rc through the wire series connection, inductance L is located between freewheel diode Vd and storage capacitor C, test resistance Rc is located between storage capacitor C and the load Rl, voltage on the load Rl is V1, test resistance Rc is last to have the ampere meter A in series connection, be connected with voltmeter V on the test resistance Rc, ampere meter A's output port, voltmeter V's output port all is connected with MCU controller's input port, MCU controller's output port passes through data line and comparator M's input port, comparator M's output port passes through the turns of motor and is connected with MCU controller's input port through the data line, MCU output port and servo controller input port through the servo circuit.
Preferably, the primary coil of the transformer T is a coil with adjustable number of turns.
Preferably, the turns ratio of the primary coil to the secondary coil of the transformer T is 3:1.
preferably, the inductance of the inductor L ranges from 0.1 to 10000 μh.
Preferably, the measuring range of the voltmeter V is 0-100V.
Preferably, the resistance of the test resistor Rc is 0.8Ω -1.2Ω.
Compared with the prior art, the invention has the beneficial effects that: according to the air conditioner protection circuit powered by the direct-current switching power supply, the output voltage of the circuit is regulated and controlled through the design of adjustable transformation, the sample collection is carried out on the output circuit through the series test resistor Rc, and the comparison result is used as a comparison basis for debugging, so that the output voltage is relatively stable.
Drawings
Fig. 1 is a schematic circuit diagram of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides a technical solution: the utility model provides an air conditioner protection circuit of direct current switching power supply, includes voltage input V0, establish ties with transformer T's primary coil between two sets of terminal connection of voltage input V0, transformer T's secondary coil's upside has switch tube V and inductance L through the wire series connection, connect in parallel between transformer T's secondary coil's two sets of terminal connection has freewheel diode Vd, storage capacitor C and load Rl, transformer T's secondary coil's downside has test resistance Rc through the wire series connection, inductance L is located between freewheel diode Vd and storage capacitor C, test resistance Rc is located between storage capacitor C and the load Rl, voltage on the load Rl is V1, test resistance Rc is last to have the ampere meter A in series connection, be connected with voltmeter V on the test resistance Rc, ampere meter A's output port, voltmeter V's output port all is connected with MCU controller's input interface, MCU controller's output port passes through data line and comparator M's input port, comparator M's output port passes through the turns of comparator M and turns controller and is connected with MCU's input port through the servo controller through the output port, servo motor control circuit and is connected with MCU's output terminal.
The primary coil of the transformer T is a coil with adjustable turns, and the turn ratio of the primary coil to the secondary coil of the transformer T is 3:1, the inductance of the inductor L ranges from 0.1 to 10000 mu H, the measuring range of the voltmeter V ranges from 0V to 100V, and the resistance value of the test resistor Rc ranges from 0.8Ω to 1.2Ω.
Working principle: the voltage input end V0 outputs 220V voltage, the transformer T adjusts the access turn number of the primary coil of the transformer T according to the use requirement of the load Rl, so that the turn ratio of the primary coil and the secondary coil of the transformer T is changed, the switching tube V is a switching tube, when the switching tube V is conducted, the input voltage supplies power to the load Rl through the inductor L and simultaneously charges the energy storage capacitor C, in the process, the energy storage capacitor C and the inductor L store energy, when the switching tube V is cut off, the energy stored in the inductor L continues to supply power to the load Rl, when the output voltage is about to drop, the energy in the energy storage capacitor C also discharges to the load Rl, the output voltage is kept unchanged, the freewheeling diode Vd is a circuit loop and carries out rectification, the measured values of the voltmeter V and the voltmeter A are all transmitted to the MCU controller, the MCU controller carries out the ratio (r=u/i) on the measured values of the voltage and the current, the output loop of the DC voltage stabilizing power supply is connected with a current sampling resistor in series, the voltage on the resistor and the output current is extremely small compared with the turn number of turns of the winding to the output voltage M, if the voltage is more stable than the voltage is outputted to the MCU, and the voltage is output by the voltage is more stable than the input to the MCU, and the voltage is stable through the regulation mode.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides an air conditioner protection circuit of direct current switching power supply, includes voltage input V0, its characterized in that: the transformer is characterized in that two groups of connecting posts of the voltage input end V0 are connected in series with a primary coil of a transformer T, a switch tube V and an inductor L are connected in series on the upper side of a secondary coil of the transformer T through a wire, a free-wheeling diode Vd, an energy storage capacitor C and a load Rl are connected in parallel between the two groups of connecting posts of the secondary coil of the transformer T, a test resistor Rc is connected in series on the lower side of the secondary coil of the transformer T through a wire, the inductor L is positioned between the free-wheeling diode Vd and the energy storage capacitor C, the test resistor Rc is positioned between the energy storage capacitor C and the load Rl, the voltage on the load Rl is V1, a ammeter A is connected in series on the test resistor Rc, a voltmeter V is connected in parallel on the test resistor Rc, an output port of the ammeter A and an output port of the voltmeter V are connected with an input port of an MCU controller, an output port of the MCU controller is connected with an input port of a comparator M through a data wire, an output port of the comparator M is connected with an input port of the MCU controller through a data wire, the output port of the MCU controller is connected with an output port of the MCU controller through a turn number of a servo control motor and a servo circuit of the MCU controller.
2. The air conditioner protection circuit powered by a dc switching power supply as claimed in claim 1, wherein: the primary coil of the transformer T is a coil with adjustable turns.
3. The air conditioner protection circuit powered by a dc switching power supply as claimed in claim 1, wherein: the turns ratio of the primary coil to the secondary coil of the transformer T is 3:1.
4. the air conditioner protection circuit powered by a dc switching power supply as claimed in claim 1, wherein: the inductance L has an inductance value ranging from 0.1 to 10000 mu H.
5. The air conditioner protection circuit powered by a dc switching power supply as claimed in claim 1, wherein: the measuring range of the voltmeter V is 0-100V.
6. The air conditioner protection circuit powered by a dc switching power supply as claimed in claim 1, wherein: the resistance value of the test resistor Rc is 0.8Ω -1.2Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810266831.1A CN108322068B (en) | 2018-03-28 | 2018-03-28 | Air conditioner protection circuit powered by direct-current switch power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810266831.1A CN108322068B (en) | 2018-03-28 | 2018-03-28 | Air conditioner protection circuit powered by direct-current switch power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108322068A CN108322068A (en) | 2018-07-24 |
| CN108322068B true CN108322068B (en) | 2024-02-06 |
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| CN201810266831.1A Active CN108322068B (en) | 2018-03-28 | 2018-03-28 | Air conditioner protection circuit powered by direct-current switch power supply |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0184963A2 (en) * | 1984-12-13 | 1986-06-18 | Unitrode Corporation | Synchronous power rectifier and applications thereof |
| US20070097720A1 (en) * | 2005-11-01 | 2007-05-03 | Chao-Cheng Lu | Lus semiconductor and synchronous rectifier circuits |
| CN103412276A (en) * | 2013-08-09 | 2013-11-27 | 无锡晶磊电子有限公司 | Simple testing tool for mutual inductor |
| CN104467473A (en) * | 2014-11-22 | 2015-03-25 | 成都智利达科技有限公司 | Nonlinearity negative-feedback unsaturation stabilized switching power supply |
| CN204316355U (en) * | 2014-11-22 | 2015-05-06 | 成都智利达科技有限公司 | Based on the switching power supply of equilibrium modulation circuit |
| CN107534386A (en) * | 2015-04-24 | 2018-01-02 | 施密徳豪泽股份公司 | Dc voltage changer |
| CN207910696U (en) * | 2018-03-28 | 2018-09-25 | 江苏新安电器有限公司 | A kind of air conditioner protection circuit of direct-current switch power supply power supply |
-
2018
- 2018-03-28 CN CN201810266831.1A patent/CN108322068B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0184963A2 (en) * | 1984-12-13 | 1986-06-18 | Unitrode Corporation | Synchronous power rectifier and applications thereof |
| US20070097720A1 (en) * | 2005-11-01 | 2007-05-03 | Chao-Cheng Lu | Lus semiconductor and synchronous rectifier circuits |
| CN103412276A (en) * | 2013-08-09 | 2013-11-27 | 无锡晶磊电子有限公司 | Simple testing tool for mutual inductor |
| CN104467473A (en) * | 2014-11-22 | 2015-03-25 | 成都智利达科技有限公司 | Nonlinearity negative-feedback unsaturation stabilized switching power supply |
| CN204316355U (en) * | 2014-11-22 | 2015-05-06 | 成都智利达科技有限公司 | Based on the switching power supply of equilibrium modulation circuit |
| CN107534386A (en) * | 2015-04-24 | 2018-01-02 | 施密徳豪泽股份公司 | Dc voltage changer |
| CN207910696U (en) * | 2018-03-28 | 2018-09-25 | 江苏新安电器有限公司 | A kind of air conditioner protection circuit of direct-current switch power supply power supply |
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| Publication number | Publication date |
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| CN108322068A (en) | 2018-07-24 |
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Address after: 215000 No. 111 Kangyuan Road, Xiangcheng Economic Development Zone, Suzhou City, Jiangsu Province Patentee after: JIANGSU SIMAND ELECTRIC APPLIANCE Co.,Ltd. Country or region after: Zhong Guo Address before: 215100 No. 111 Kangyuan Road, Xiangcheng Economic Development Zone, Suzhou City, Jiangsu Province Patentee before: JIANGSU XIN AN ELECTRIC APPLIANCE Co.,Ltd. Country or region before: Zhong Guo |
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