CN202451445U - Control circuit for blower of automobile air conditioner - Google Patents
Control circuit for blower of automobile air conditioner Download PDFInfo
- Publication number
- CN202451445U CN202451445U CN2011204431395U CN201120443139U CN202451445U CN 202451445 U CN202451445 U CN 202451445U CN 2011204431395 U CN2011204431395 U CN 2011204431395U CN 201120443139 U CN201120443139 U CN 201120443139U CN 202451445 U CN202451445 U CN 202451445U
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- CN
- China
- Prior art keywords
- blower
- links
- resistance
- operational amplifier
- fan
- 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.)
- Expired - Lifetime
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- Air-Conditioning For Vehicles (AREA)
Abstract
The utility model relates to a control circuit for a blower of an automobile air conditioner. The output end of the control circuit for the blower is connected with a power metal oxide semiconductor (MOS) pipe; the other end of the control circuit for the blower is connected with a micro controller; the power MOS pipe is connected with the blower; and the blower is connected with the micro controller. The rotation speed of the blower can be controlled by controlling the output voltage of the circuit of the blower, namely changing the current between the grid and the source of a Metal-Oxide -Semiconductor Field Effect Transistor (MOSFET)-N1.
Description
Technical field
The utility model relates to a kind of blower for vehicle air conditioning, relates in particular to a kind of control circuit of blower for vehicle air conditioning.
Background technique
At present, a lot of blower for vehicle air conditioning controls adopt the speed adjusting resistance device to control the rotating speed of blower.Because blower speed is to be decided by the size through its electric current, regulate and control the rotating speed of blower, the electric current that only needs to change blower gets final product.Though and that the method that such resistance that passes through to change resistor is regulated and control the rotating speed of blower realizes is simple, is difficult for the support control.
The model utility content
The technical problem that the utility model will solve provides a kind of control circuit of blower for vehicle air conditioning.
For achieving the above object, the technological scheme of the utility model is following:
A kind of control circuit of blower for vehicle air conditioning; The output terminal of said control circuit of blower links to each other with power MOS pipe; The other end of said control circuit of blower links to each other with microcontroller, and said power MOS pipe links to each other with blower, and said blower links to each other with microcontroller.
Preferably; Described control circuit of blower comprises the power supply signal FAN_PWR of blower; Power supply signal FAN_PWR links to each other with the positive pole of the second operational amplifier UIB through first resistance R 1; The positive pole of the second operational amplifier UIB through and the 3rd resistance R 3 that connects and first capacitor C, 1 back ground connection; The feedback signal FAN_FB of blower links to each other with the negative pole of the second operational amplifier UIB through second resistance R 2, and the negative pole of the second operational amplifier UIB links to each other with power supply ground through second capacitor C 2, the output signal of the second operational amplifier UIB through and the 4th resistance R 4 and the 4th capacitor C 4 that connect feed back to its negative input; The output terminal of second operational amplifier is linked the sampled signal ANI7 of CPU through the 5th resistance R S, and the other end of the 5th resistance R S is through the 3rd capacitor C 3 ground connection; The output terminal of the second operational amplifier U1B links to each other with the positive pole of the first operational amplifier UIA through the 22 resistance R 22; The negative pole of the first operational amplifier UIA links to each other with ground through electrochemical capacitor E1; The control signal V_CON of CPU links to each other with the negative pole of the first operational amplifier UIA through the 6th resistance R 6; The control signal V_CON of CPU links to each other with power supply ground through the 7th resistance R 7: the output terminal of the first operational amplifier UIA is linked its electrode input end through the 5th integrating capacitor CS; The output terminal of first operational amplifier links to each other with the collector electrode of the first triode TR1 through the 25 resistance R 2S; The emitter of the first triode TR1 links to each other with power supply ground; The switch controlling signal FAN_CUT of CPU links to each other with the base stage of the first triode TR1 through the 24 resistance R 24; Power supply signal VCC links to each other with CPU control signal FAN_CUT through the 23 resistance R 23, and the base stage of the first triode TR1 links to each other with power supply ground through the 6th capacitor C 6, and the control signal FAN_CTR of blower links to each other with the collector electrode of the first triode TR1 through the 26 resistance R 26: the drain electrode of power MOS pipe links to each other with the negative pole of blower; DC12V positive source and blower positive pole link to each other; The DC12V power cathode links to each other with the source electrode of metal-oxide-semiconductor: the control signal FAN_CTR of blower circuit connects the grid of metal-oxide-semiconductor, draws the feedback signal input end FAN_FIB that feedback signal FAN_FIB connects blower circuit from the negative terminal of blower, and the DC12V power supply of blower meets the power supply signal input end FAN_PWR of blower circuit.
Through technique scheme, the beneficial effect of the utility model is:
Output voltage through the control blower circuit can change the electric current between the N1 grid source under the MOSFE, thus the rotating speed of may command blower.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technological scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the utility model, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the module map of the utility model;
Fig. 2 is the concrete circuti diagram of control circuit of blower among Fig. 1;
Fig. 3 is the concrete circuti diagram of power MOS pipe among Fig. 1.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach purpose and be easy to understand understanding with effect, below in conjunction with concrete diagram, further set forth the utility model.
Visible by Fig. 1; A kind of control circuit of blower for vehicle air conditioning of the utility model; The output terminal of said control circuit of blower links to each other with power MOS pipe; The other end of said control circuit of blower links to each other with microcontroller, and said power MOS pipe links to each other with blower, and said blower links to each other with microcontroller.Said microcontroller reads the blower current working state, and controls the running of blower through blower circuit.
Control circuit of blower comprises the feedback arithmetic circuit, and blower power supply, feedback signal are carried out the difference scale operation; The microprocessor controls signal input circuit, blower control signal output circuit carries out integral operation to the control signal of microcontroller; The blower switch circuit is controlled cut-offfing of blower.
Visible by Fig. 2; Described control circuit of blower comprises the power supply signal FAN_PWR of blower; Power supply signal FAN_PWR links to each other with the positive pole of the second operational amplifier UIB through first resistance R 1; The positive pole of the second operational amplifier UIB through and the 3rd resistance R 3 that connects and first capacitor C, 1 back ground connection; The feedback signal FAN_FIB of blower links to each other with the negative pole of the second operational amplifier UIB through second resistance R 2; The negative pole of the second operational amplifier UIB links to each other with power supply ground through second capacitor C 2; The output signal of the second operational amplifier UIB through and the 4th resistance R 4 and the 4th capacitor C 4 that connect feed back to its negative input; The output terminal of second operational amplifier is linked the sampled signal ANI7 of CPU through the 5th resistance R 5; The other end of the 5th resistance R 5 passes through the 3rd capacitor C 3 ground connection: the output terminal of the second operational amplifier UIB links to each other with the positive pole of the first operational amplifier UIA through the 22 resistance R 22; The negative pole of the first operational amplifier UIA links to each other with ground through electrochemical capacitor E1, and the control signal V_CON of CPU links to each other with the negative pole of the first operational amplifier UIA through the 6th resistance R 6, and the control signal V_CON of CPU links to each other with power supply ground through the 7th resistance R 7: the output terminal of the first operational amplifier UIA is linked its electrode input end through the 5th integrating capacitor C5; The output terminal of first operational amplifier links to each other with the collector electrode of the first triode TR1 through the 25 resistance R 25; The emitter of the first triode TR1 links to each other with power supply ground, and the switch controlling signal FAN_CUT of CPU links to each other with the base stage of the first triode TR1 through the 24 resistance R 24, and power supply signal VCC links to each other with CPU control signal FAN_CUT through the 22 resistance R 23; The base stage of the first triode TR1 links to each other with power supply ground through the 6th capacitor C 6, and the control signal FAN_CTR of blower links to each other with the collector electrode of the first triode TR1 through the 26 resistance R 26:
Visible by Fig. 3, the drain electrode of speed adjusting module power MOS pipe links to each other with the negative pole of blower, DC12V positive source and blower positive pole link to each other, the DC12V power cathode links to each other with the source electrode of metal-oxide-semiconductor.The control signal FAN_CTR of blower circuit connects the grid of metal-oxide-semiconductor; Draw the feedback signal input end FAN_FIB that feedback signal FAN_F/B connects blower circuit from the negative terminal of blower, the DC12V power supply of blower meets the power supply signal input end FAN_PWR of blower circuit.
Characteristic by metal-oxide-semiconductor can be known, flows through the current i of drain-source
DAnd the voltage U between the grid source
GsBecome certain functional relation: i
D=f (U
Gs)/U
DS
Work as U
GsWhen being zero or very little, do not have electric current in the metal-oxide-semiconductor, pipe is in cut-off state;
Work as U
Gs＞U
TN(U
TNConducting voltage for metal-oxide-semiconductor) after, at U
DSWhen smaller, i
DWith U
DS(voltage between the drain-source) becomes linear approximate relationship, therefore can be by U regarding one as between drain electrode and the source electrode
GsThe resistance of controlling, U
GsBig more, curve is steep more, and equivalent resistance is more little.
Work as U
Gs＞U
TN, at U
DSWhen bigger, i
DOnly be decided by U
Gs, and and U
DSAlmost irrelevant, can be seen as one between D, the S and receive U
GsThe current source of control.
So output voltage U through the control blower circuit
GsCan change the electric current between the MOSFE-N1 grid source, thus the rotating speed of may command blower.
The purpose of the utility model is the control blower speed; FAN_PWR and FAN_F/B are the voltage signal at blower two ends; Represent the operating voltage of blower; The magnitude of voltage that behind the scale operation circuit, obtains is delivered to microcontroller as the sampled voltage of blower; Remove to control the rotating speed (voltage) of blower after microcontroller compares the control voltage of this voltage and setting, the virtual voltage of blower is equated with the control voltage of setting: blower opening is closed then and is realized through microprocessor controls FAN_CUT signal.
In Fig. 2: FAN_PWR is a blower power supply
FAN_F/B is the blower feedback signal
ANI7 is the sampled signal of CPU
V_CON is the control signal of blower circuit
FAN_CUT is a switch controlling signal
FAN_CTR is the blower control signal
The utility model fills the situation that part has considered that various interference noises exist, and has effectively suppressed various interference and high frequency clutter, has guaranteed the stable operation of circuit.
More than show and described basic principle of the utility model and the advantage of major character and the utility model.The technician of the industry should understand; The utility model is not restricted to the described embodiments; The principle of describing in the foregoing description and the specification that the utility model just is described; Under the prerequisite that does not break away from the utility model spirit and scope, the utility model also has various changes and modifications, and these variations and improvement all fall in the utility model scope that requires protection.The utility model requires protection domain to be defined by appending claims and equivalent thereof.
Claims (2)
1. control circuit of blower for vehicle air conditioning; It is characterized in that: the output terminal of said control circuit of blower links to each other with power MOS pipe; The other end of said control circuit of blower links to each other with microcontroller, and said power MOS pipe links to each other with blower, and said blower links to each other with microcontroller.
2. a kind of control circuit of blower for vehicle air conditioning according to claim 1; It is characterized in that: described control circuit of blower comprises the power supply signal (FAN_PWR) of blower; Power supply signal (FAN_PWR) links to each other with the positive pole of second operational amplifier (UIB) through first resistance (R1); The positive pole of second operational amplifier (UIB) through and the 3rd resistance (R3) that connects and first electric capacity (C1) back ground connection; The feedback signal of blower (FANFB) links to each other with the negative pole of second operational amplifier (UIB) through second resistance (R2); The negative pole of second operational amplifier (UIB) links to each other with power supply ground through second electric capacity (C2); The output signal of second operational amplifier (UIB) through and the 4th resistance (R4) and the 4th electric capacity (C4) that connect feed back to its negative input, the output terminal of second operational amplifier is linked the sampled signal (ANI7) of CPU through the 5th resistance (RS), the other end of the 5th resistance (RS) is through the 3rd electric capacity (C3) ground connection; The output terminal of second operational amplifier (UlB) links to each other with the positive pole of first operational amplifier (UIA) through the 22 resistance (R22); The negative pole of first operational amplifier (UIA) links to each other with ground through electrochemical capacitor (E1); The control signal of CPU (V_CON) links to each other through the negative pole of the 6th resistance (R6) with first operational amplifier (UIA); The control signal of CPU (V_CON) links to each other with power supply ground through the 7th resistance (R7): the output terminal of first operational amplifier (UIA) is linked its electrode input end through the 5th integrating capacitor (CS); The output terminal of first operational amplifier links to each other with the collector electrode of first triode (TRl) through the 25 resistance (R2S); The emitter of first triode (TRl) links to each other with power supply ground; The switch controlling signal of CPU (FAN_CUT) links to each other with the base stage of first triode (TRl) through the 24 resistance (R24); Power supply signal (VCC) links to each other with CPU control signal (FAN_CUT) through the 23 resistance (R23); The base stage of first triode (TRl) links to each other with power supply ground through the 6th electric capacity (C6), and the control signal of blower (FAN_CTR) links to each other with the collector electrode of first triode (TRl) through the 26 resistance (R26): the drain electrode of power MOS pipe links to each other with the negative pole of blower, and the DC12V positive source links to each other with the positive pole of blower; The DC12V power cathode links to each other with the source electrode of metal-oxide-semiconductor; The control signal of blower circuit (FAN_CTR) connects the grid of metal-oxide-semiconductor, draws the feedback signal input end (FAN_FIB) that feedback signal (FAN_FIB) connects blower circuit from the negative terminal of blower, and the DC12V power supply of blower connects the power supply signal input end (FAN_PWR) of blower circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204431395U CN202451445U (en) | 2011-11-10 | 2011-11-10 | Control circuit for blower of automobile air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204431395U CN202451445U (en) | 2011-11-10 | 2011-11-10 | Control circuit for blower of automobile air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202451445U true CN202451445U (en) | 2012-09-26 |
Family
ID=46867311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204431395U Expired - Lifetime CN202451445U (en) | 2011-11-10 | 2011-11-10 | Control circuit for blower of automobile air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202451445U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106314081A (en) * | 2016-08-29 | 2017-01-11 | 博耐尔汽车电气系统有限公司 | Control method used for keeping air speed of automatic conditioner of car constant |
| CN108331778A (en) * | 2018-03-26 | 2018-07-27 | 奇瑞汽车股份有限公司 | Control circuit of blower for vehicle air conditioning |
-
2011
- 2011-11-10 CN CN2011204431395U patent/CN202451445U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106314081A (en) * | 2016-08-29 | 2017-01-11 | 博耐尔汽车电气系统有限公司 | Control method used for keeping air speed of automatic conditioner of car constant |
| CN108331778A (en) * | 2018-03-26 | 2018-07-27 | 奇瑞汽车股份有限公司 | Control circuit of blower for vehicle air conditioning |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120926 |
|
| CX01 | Expiry of patent term |