CN2819620Y - DC booster circuit of air conditioner - Google Patents
DC booster circuit of air conditioner Download PDFInfo
- Publication number
- CN2819620Y CN2819620Y CN 200520082077 CN200520082077U CN2819620Y CN 2819620 Y CN2819620 Y CN 2819620Y CN 200520082077 CN200520082077 CN 200520082077 CN 200520082077 U CN200520082077 U CN 200520082077U CN 2819620 Y CN2819620 Y CN 2819620Y
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- air conditioner
- circuit
- stk762
- chip
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- Expired - Fee Related
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Abstract
The utility model relates to a direct current booster circuit of an air conditioner. A modular circuit design is realized, which means that a Boost type circuit structure of an STK 762 chip is used for the integration of power tubes, diodes and various protection control circuits into an integral booster module. Thereby, the volume of the booster module is decreased to the greatest extent and the working temperature of an inductor is lowered to enhance the use reliability of a booster system. The direct current booster circuit of an air conditioner filters the input 110V voltage, and the output voltage is boosted to 240V through the STK 762 booster module. DC/AC inversion is carried out on the boosted DC240V so as to drive a compressor to work and run. The direct current booster circuit is composed of an energy storage inductor, an STK 762 booster module, a filtering capacitor and a load, wherein the booster module is formed by that the power tubes, the diodes and the protection control circuits are integrated on the STK 762 chip. Just working frequency circuits, sampling circuits, protection circuits, etc. are required to be used as peripheral circuits.
Description
Technical field
The utility model is a kind of Novel DC booster circuit, and this circuit application is in the air conditioner power circuit.
Background technology
Be applied to the conditioner of the outdoor environment or the vehicles at present,, adopt DC power supply to come the Driven Compressor operation mostly through the DC/AC inversion as locomotive air conditioner, outdoor mobile air-conditioning etc.The output of DC power supply is generally 110V, and compressor start and working voltage normally AC220V or AC380V, therefore need to compressor drive apparatus be equipped with boost, inverter circuit.
Existing compressor DC voltage booster circuit as shown in Figure 1 mainly is made up of energy storage inductor L1, power transistor IGBT, isolating diode D1 and filter capacitor C1.In existing DC voltage booster circuit, when the IGBT conducting, DC power supply is to inductance L 1 energy storage, and load RL is by capacitor C 1 power supply; When IGBT by the time, energy in the inductance L 1 and input power supply stack back by diode D1 to load RL power supply, simultaneously also to capacitor C 1 charging.Can come regulated output voltage by adjusting the duty ratio of IGBT conducting.
As above-mentioned existing DC voltage booster circuit, be the output voltage of DC310V for realizing input voltage DC110V boosted, need to use high-power, height is withstand voltage and the power transistor of big electric current, and the big inductor about 1mH (air conditioner with the 5KW refrigerating capacity is an example) and other voltages, current protecting circuit, the booster circuit that therefore above-mentioned employing resolution element is formed can take larger volume, this is a contradiction very for the limited locomotive air conditioner in space and outdoor mobile air-conditioning, the air conditioner entire machine design makes every effort to small and exquisite on the one hand, light, but need be equipped with heaviness on the other hand, the booster circuit that the space hold amount is big; In addition, above-mentioned boost circuit structure is comparatively complicated, failure rate is higher, repair and maintenance is comparatively difficult.
The utility model content
Air conditioner DC voltage booster circuit described in the utility model; its purpose is to address the above problem with deficiency provides a kind of modularized circuit design; promptly adopt the Boost type circuit structure of STK762 chip; power tube, diode and various protection, control circuit are integrated into all-in-one-piece boost module; thereby the volume of boost module is dwindled to greatest extent, and the working temperature of reduction inductor improves the dependability of booster system.
Described air conditioner DC voltage booster circuit behind the 110V voltage filter with input, is promoted to 240V by described STK762 boost module with output voltage.DC240V after the lifting is again through DC/AC inversion Driven Compressor work afterwards running.
Described air conditioner DC voltage booster circuit, its primary structure is made up of energy storage inductor, STK762 boost module and filter capacitor, load.
Wherein, described boost module is that power tube, diode and protection control circuit integrally are integrated on the STK762 chip, and peripheral need be provided with operating frequency and circuit such as sampling, protection.
Described boost module is monitored by the MCU control circuit on the air conditioner master control borad.Include start-stop control circuit, output voltage initialization circuit, switch control computing circuit and output sample circuit, overvoltage crowbar and excess temperature/current foldback circuit in the boost module.
Start the needs that move according to cooler compressor, send a switch command to the switch of STK762 chip by the MCU control circuit and [control pin, to realize opening or closing this boost module.
Use overvoltage, the gentle current foldback circuit of mistake in the described boost module, carry out computing according to the sampling of output voltage, come the duty cycle of switching of power controlling pipe IGBT by boost module.By regulating the duty cycle of switching of power tube IGBT, come regulated output voltage.
When if described boost module monitors excess temperature or overcurrent; can send guard signal to the MCU control circuit by the excess temperature/overcurrent protection pin of STK762 chip; then the MCU control circuit is then controlled pin by the switch of the above-mentioned STK762 chip of control; close this boost module, promptly stop the operation of compressor.
In sum, the advantage of air conditioner DC voltage booster circuit of the present utility model is:
1, described booster circuit employing PFC module makes and has dwindled the integrated circuit designs simplification booster circuit greatly and taken up space, and helps the miniaturization Design of locomotive air conditioner or outdoor mobile air conditioner;
2, comparatively simple, the modular integrated degree height of described boost circuit structure, operating efficiency improve and help control, and the overall cost cost is lower;
3, described booster circuit for overvoltage, to cross gentle overcurrent protection comparatively sensitive, improves usage safety performance and useful life, convenient maintenance.
Description of drawings
Fig. 1 is the structure chart of existing air conditioner booster circuit;
Fig. 2 is a driven compressor structure chart of using described air conditioner DC voltage booster circuit;
Fig. 3 is the structural representation of described air conditioner DC voltage booster circuit;
Fig. 4 is described STK762 chip structure schematic diagram.
Embodiment
Embodiment 1, as shown in Figure 2, uses described air conditioner DC voltage booster circuit and realizes in the driven compressor process, behind the DC110V voltage filter of described booster circuit with input, by described STK762 boost module output voltage is promoted to DC240V.DC240V after the lifting is again through DC/AC inversion Driven Compressor work afterwards running.Block diagram as shown in Figure 3.
As shown in Figure 3, described STK762 chip mainly includes power supply input circuit, work initialization circuit, protective circuit and IGBT power tube ON-OFF control circuit, output circuit.STK762-XXX inside modules detailed diagram as shown in Figure 4, wherein,
In power supply input circuit, pin one 3 (VCC1) is the positive input terminal of boost module working power; Pin one 9 is negative input ends of boost module working power; The collector electrode of power tube IGBT among the pin C; Pin R is a current detecting power resistor end.
In the work initialization circuit, that pin 8 (ON/OFF terminal) and pin 9 (VPR terminal) are controlled the boost module boost action respectively is initial/control end that stops; Pin one 6 and pin one 7 are internal oscillator generator input resistance and electric capacity control end, in order to produce the internal oscillator source; Pin two 2 (VFEED terminal) is set end for output voltage; Pin one 8 (VRMS) is line (line) voltage effective value input; Pin one 4 (P-UVLO terminal) is set end for connecting voltage; Pin two 1 (ISINE terminal) is the current waveform input, is used for the power factor adjustment; Pin one 2 (SoftStart terminal) is the soft start function end.
In protective circuit, pin two 0 (Vovp terminal) is the overvoltage protection set input; Pin one 0 (Vovp terminal) is excess temperature/overcurrent protection output.
In IGBT power tube ON-OFF control circuit, mainly include multiplier, oscillator, PWM generator etc.
At output circuit, mainly include power tube IGBT, diode D1 and output voltage anode (+) and negative terminal (-).
Start the needs that move according to cooler compressor, send the switch control pin 8 of a switch command by the MCU control circuit, to realize opening or closing this boost module to the STK762 chip.
In overvoltage, the gentle overcurrent protection scope of mistake, boost module carries out computing according to the sampling of output voltage, comes the duty cycle of switching of power controlling pipe IGBT.When boost module monitors excess temperature or overcurrent, can pass through pin one 0 output protection signal.
In addition, energy-storage reactor L1 adopts sendust core.With high temperature lacquer envelope curve five cores and around, inductance value is 0.5mH (air conditioner with the 5KW refrigerating capacity is an example), thereby has reduced winding volume greatly.
Claims (6)
1, a kind of air conditioner DC voltage booster circuit is characterized in that: dc power output end is connected behind the energy storage inductor, is parallel with a STK762 boost module and a filter capacitor and a load respectively.
2, air conditioner DC voltage booster circuit according to claim 1 is characterized in that: described boost module is that power tube, diode and protection control circuit integrally are integrated on the STK762 chip; Boost module is monitored by the MCU control circuit on the air conditioner master control borad; The signal output part of MCU control circuit is connected with the switch control pin (8) of STK762 chip; The excess temperature of STK762 chip/overcurrent protection pin (10) is connected with the signal input part of MCU control circuit.
3, air conditioner DC voltage booster circuit according to claim 2 is characterized in that: the power supply input circuit of described STK762 chip, and its pin (13) is the positive input terminal of boost module working power; Pin (19) is the negative input end of boost module working power; The collector electrode of power tube IGBT in the pin (C); Pin (R) is a current detecting power resistor end.
4, according to claim 2 or 3 described air conditioner DC voltage booster circuit, it is characterized in that: the work initialization circuit of described STK762 chip, that pin (8) and pin (9) are controlled the boost module boost action respectively is initial/control end that stops; Pin (16) and pin (17) are internal oscillator generator input resistance and electric capacity control end; Pin (22) is set end for output voltage; Pin (18) is line (line) voltage effective value input; Pin (14) is set end for connecting voltage; Pin (21) is the current waveform input; Pin (12) is the soft start function end.
5, air conditioner DC voltage booster circuit according to claim 4 is characterized in that: the protective circuit of described STK762 chip, and pin (20) is the overvoltage protection set input; Pin (10) is excess temperature/overcurrent protection output.
6, air conditioner DC voltage booster circuit according to claim 5 is characterized in that: described energy storage inductor adopts sendust core, with high temperature lacquer envelope curve five cores and around, inductance value is 0.5mH.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520082077 CN2819620Y (en) | 2005-04-04 | 2005-04-04 | DC booster circuit of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520082077 CN2819620Y (en) | 2005-04-04 | 2005-04-04 | DC booster circuit of air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2819620Y true CN2819620Y (en) | 2006-09-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520082077 Expired - Fee Related CN2819620Y (en) | 2005-04-04 | 2005-04-04 | DC booster circuit of air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2819620Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251286B (en) * | 2007-02-02 | 2011-04-20 | 山东朗进科技股份有限公司 | System and method for controlling emergency draft of air conditioner |
| CN103597723A (en) * | 2011-04-29 | 2014-02-19 | 赤多尼科两合股份有限公司 | Method and circuit for power factor correction |
| CN109510458A (en) * | 2017-09-12 | 2019-03-22 | 株洲中车时代电气股份有限公司 | Boost filter |
| CN111398782A (en) * | 2020-03-25 | 2020-07-10 | 美的集团股份有限公司 | Power supply circuit, circuit fault detection method, circuit board and vehicle-mounted air conditioner |
-
2005
- 2005-04-04 CN CN 200520082077 patent/CN2819620Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101251286B (en) * | 2007-02-02 | 2011-04-20 | 山东朗进科技股份有限公司 | System and method for controlling emergency draft of air conditioner |
| CN103597723A (en) * | 2011-04-29 | 2014-02-19 | 赤多尼科两合股份有限公司 | Method and circuit for power factor correction |
| CN103597723B (en) * | 2011-04-29 | 2016-08-17 | 赤多尼科两合股份有限公司 | Method and circuits for PFC |
| CN109510458A (en) * | 2017-09-12 | 2019-03-22 | 株洲中车时代电气股份有限公司 | Boost filter |
| CN111398782A (en) * | 2020-03-25 | 2020-07-10 | 美的集团股份有限公司 | Power supply circuit, circuit fault detection method, circuit board and vehicle-mounted air conditioner |
| CN111398782B (en) * | 2020-03-25 | 2021-11-26 | 美的集团股份有限公司 | Power supply circuit, circuit fault detection method, circuit board and vehicle-mounted air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SANHE SCI. & TECH. CO., LTD., LAIWU CITY Free format text: FORMER OWNER: QINGDAO LANGJIN SOFTWARE CO., LTD. Effective date: 20070706 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070706 Address after: 271100 No. 105 Middle East Avenue, hi tech Zone, Shandong, Laiwu Patentee after: Laiwu Sanhe Technology Co., Ltd. Address before: 266071 Shandong city of Qingdao province Hongkong City Road No. 116 building of science and technology Patentee before: Qingdao Langjin Software Co., Ltd. |
|
| ASS | Succession or assignment of patent right |
Owner name: SHANDONG LANGJIN TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: SANHE SCI. + TECH. CO., LTD., LAIWU CITY Effective date: 20080627 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080627 Address after: No. 105, Middle East Street, hi tech Zone, Shandong, Laiwu: 271100 Patentee after: Longertek Technology Ltd. Address before: No. 105, Middle East Street, hi tech Zone, Shandong, Laiwu: 271100 Patentee before: Laiwu Sanhe Technology Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060920 Termination date: 20140404 |