CN202117962U - Voltage-controlled PWM (pulse width modulation) speed-regulating module for automotive air conditioner - Google Patents
Voltage-controlled PWM (pulse width modulation) speed-regulating module for automotive air conditioner Download PDFInfo
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- CN202117962U CN202117962U CN2011201741756U CN201120174175U CN202117962U CN 202117962 U CN202117962 U CN 202117962U CN 2011201741756 U CN2011201741756 U CN 2011201741756U CN 201120174175 U CN201120174175 U CN 201120174175U CN 202117962 U CN202117962 U CN 202117962U
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Abstract
A voltage-controlled PWM speed-regulating module for an automotive air conditioner is disclosed, comprising an adjustable potentiometer, wherein a voltage signal output by the adjustable potentiometer is conveyed into a V-PWM (voltage-pulse width modulation) switching circuit; a PWM signal output by the V-PWM switching circuit drives a high-power transistor; and the output end of the high-power transistor is connected with a fan. The voltage-controlled PWM speed-regulating module for an automotive air conditioner disclosed by the utility model adopting the technical scheme aforementioned integrates the advantages of the second and the third control modes in the original technology in the speed-regulating module, and uses the PWM signal in proportion to the corresponding duty ratio of a control input voltage for controlling the air speed of the fan, thereby realizing the good air speed linearity, less than 5 W of low power consumption and small calorific value of the speed-regulating module, and enhancing the energy-saving performance of the automotive; simultaneously, an electromagnetic interference is avoided.
Description
Technical field
The utility model relates to a kind of vehicle air conditioning fan delivery wind speed regulating device.
Background technique
Automobile-used speed adjusting module is to adopt adjustment blower fan power supply voltage electric current to realize a kind of blower fan control electric device of air-conditioning draught fan air quantity wind speed control.Be mainly used in the blower for vehicle air conditioning wind speed is regulated, its basic circuit is as shown in Figure 1.
The main technology that adopts is three kinds of states on the current market:
1, rheostatic speed regulation: adopt and the speed governing of blower fan series connection adjustable resistance mode; Its advantage is: simple in structure, cost is low; Shortcoming: heating value is big, and power consumption increases and increases along with the blower fan electric current, and general power loss can not realize motor linear speed regulation and soft starter for motor greater than 25W.
2, Control of Voltage speed governing: its principle is the control high-power electronic device, makes to be operated in amplification region adjustment power tube on-state rate and to realize blower voltage is controlled; Advantage: controlling method does not simply produce electromagnetic distrubance, and shortcoming: heating value is big, and the module oneself power consumption increases and increases along with the blower fan electric current, and general power loss is greater than 50W; Poor linearity, air quantity is unstable.
3, PWM (pulse duty factor modulation) signal drives high-power electronic device: make the motor voltage according to the linear adjustment of PWM dutycycle, the assurance fan delivery is regulated according to dutycycle continuously; Advantage: own loss is little, and the wind speed linearity is good, and heating value is little; Shortcoming, control mode is complicated, needs the pwm signal input; Pwm signal possibly cause electromagnetic interference generally at 15KHz.
Summary of the invention
Excessive conduction produces electromagnetic interference problem with PWM in order to solve the speed adjusting module oneself power consumption, and the utility model provides that a kind of wind speed linearity is good, low in energy consumption, heating value is little, and can not cause the car air-conditioner speed adjusting module of electromagnetic interference.
For realizing above-mentioned purpose, the utility model adopts following technological scheme:
The utility model comprises adjustable potentiometer, and the voltage signal of adjustable potentiometer output is sent into the V-PWM change-over circuit, and the pwm signal of V-PWM change-over circuit output drives high power transistor (GTR), and the output terminal of high power transistor (GTR) connects blower fan.
Described V-PWM change-over circuit is made up of two stage comparator; The sawtooth wave of first order comparator output is sent into the reverse input end of second level comparator, and the positive input of second level comparator connects the voltage signal of adjustable potentiometer output; The output terminal of second level comparator connects the driving triode.
Described high power transistor (GTR) is fixed on the radiating fin, and radiating fin is the heat conduction copper billet.
Adopt the utility model of technique scheme; Second kind in the original technology advantage with the third control mode is integrated in the speed adjusting module; Adopt the pwm signal control blower fan wind speed that is directly proportional with control input voltage duty ratio corresponding, thereby realize that the speed adjusting module wind speed linearity is good, low in energy consumption less than 5W; Heating value is little, improves automobile energy-saving property; Simultaneously can not cause electromagnetic interference.
The technical order of the utility model is following: (1) operating temperature :-20 ℃-85 ℃; (2) be applicable to 12V, 24V, 48VDC voltage; (3) power 100-300W.
Description of drawings
Fig. 1 is the theory diagram of PWM or voltage mode control in the existing technology.
Fig. 2 is the theory diagram of the utility model.
Fig. 3 is V-PWM change-over circuit figure in the utility model.
Embodiment
As shown in Figure 2; The utility model comprises adjustable potentiometer P; The voltage signal Vi of adjustable potentiometer P output sends into the V-PWM change-over circuit, and the pwm signal of V-PWM change-over circuit output drives high power transistor (GTR), high power transistor (GTR) one end bonding E; Another output terminal drives blower fan M, and blower fan M is supplied power by Ac AC.Above-mentioned high power transistor (GTR) is IGBT pipe or VMOS pipe, and this high power transistor (GTR) is fixed on the radiating fin, and radiating fin is the heat conduction copper billet.
As shown in Figure 3, the V-PWM change-over circuit is made up of two stage comparator.Wherein, the sawtooth wave of first order comparator A1 output is sent into the reverse input end of second level comparator A2, and the positive input of second level comparator A2 connects the voltage signal of adjustable potentiometer output; The output terminal of second level comparator A2 connects driving triode T.
Can find out from above description: to the voltage signal Vi of adjustable potentiometer P output; V-PWM change-over circuit internal comparator produces sawtooth wave; This sawtooth wave is relatively exported the pwm signal of corresponding dutycycle with voltage signal Vi, and drives the control of high power transistor (GTR) realization to fan speed.
In the preparation, above-mentioned adjustable potentiometer P, V-PWM change-over circuit, high power transistor (GTR) etc. are placed on the circuit board, and on circuit board, plug-in unit is set, the auxiliary elements such as heat responsive element of overtemperature protection, encapsulate with plastic casing at last.
In use, the utility model can be applied to any vehicle air conditioning blower speed regulating control, only need change difformity to adapt to the entrucking requirement according to customer requirements; Utilize custom plug-in to connect, and be fixed in its heat radiation requirement of blower fan air channel assurance, avoid the overheated component wear that causes.
Claims (3)
1. voltage-controlled car air-conditioner PWM speed adjusting module; It is characterized in that: it comprises adjustable potentiometer (P); The voltage signal of adjustable potentiometer (P) output is sent into the V-PWM change-over circuit; The pwm signal of V-PWM change-over circuit output drives high power transistor (GTR), and the output terminal of high power transistor (GTR) connects blower fan (M).
2. voltage-controlled car air-conditioner PWM speed adjusting module according to claim 1, it is characterized in that: described V-PWM change-over circuit is made up of two stage comparator; The sawtooth wave of first order comparator (A1) output is sent into the reverse input end of second level comparator (A2), and the positive input of second level comparator (A2) connects the voltage signal of adjustable potentiometer output; The output terminal of second level comparator (A2) connects the driving triode.
3. voltage-controlled car air-conditioner PWM speed adjusting module according to claim 1, it is characterized in that: described high power transistor (GTR) is fixed on the radiating fin, and radiating fin is the heat conduction copper billet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201741756U CN202117962U (en) | 2011-05-27 | 2011-05-27 | Voltage-controlled PWM (pulse width modulation) speed-regulating module for automotive air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201741756U CN202117962U (en) | 2011-05-27 | 2011-05-27 | Voltage-controlled PWM (pulse width modulation) speed-regulating module for automotive air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202117962U true CN202117962U (en) | 2012-01-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201741756U Expired - Fee Related CN202117962U (en) | 2011-05-27 | 2011-05-27 | Voltage-controlled PWM (pulse width modulation) speed-regulating module for automotive air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202117962U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780226A (en) * | 2014-02-14 | 2014-05-07 | 太原理工大学 | Energy-saving drive circuit with flexibly-controllable duty ratio |
| CN108317696A (en) * | 2018-02-10 | 2018-07-24 | 广东美的制冷设备有限公司 | Control method, device and the computer readable storage medium of air conditioner |
-
2011
- 2011-05-27 CN CN2011201741756U patent/CN202117962U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103780226A (en) * | 2014-02-14 | 2014-05-07 | 太原理工大学 | Energy-saving drive circuit with flexibly-controllable duty ratio |
| CN103780226B (en) * | 2014-02-14 | 2016-04-27 | 太原理工大学 | The flexible controlled energy saving driving circuit of a kind of duty ratio |
| CN108317696A (en) * | 2018-02-10 | 2018-07-24 | 广东美的制冷设备有限公司 | Control method, device and the computer readable storage medium of air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120118 Termination date: 20190527 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |