CN201382007Y - Control circuit for stabilizing wind speed of blast blower - Google Patents
Control circuit for stabilizing wind speed of blast blower Download PDFInfo
- Publication number
- CN201382007Y CN201382007Y CN200920070934U CN200920070934U CN201382007Y CN 201382007 Y CN201382007 Y CN 201382007Y CN 200920070934 U CN200920070934 U CN 200920070934U CN 200920070934 U CN200920070934 U CN 200920070934U CN 201382007 Y CN201382007 Y CN 201382007Y
- Authority
- CN
- China
- Prior art keywords
- resistance
- operational amplifier
- integrated operational
- inverting input
- blower
- 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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- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The utility model relates to a control circuit for stabilizing wind speed of a blast blower; the control circuit is characterized in that: the control circuit comprises a first integration operational amplifier, the non-inverting input end of the first integration operational amplifier is connected with a differential pressure loop which is connected with the anode of the blast blower, the inverting input end of the first integration operational amplifier is connected with the cathode of the blast blower by a first delay circuit, the inverting input end of the first integration operational amplifier is grounded by a first delay circuit and an eleventh resistance, the output end of the first integration operational amplifier is connected with the inverting input end of a second integration operational amplifier by a seventh resistance, a PWM generator is connected with the second integration operational amplifier by a second delay circuit, an eighth capacitance is bridged over between the inverting input end and the output end of the second integration operational amplifier, the output end of the second integration operational amplifier are respectively grounded and connected with a speed regulating module by a tenth resistance and a ninth resistance, and a seventh capacitance is bridged over between the ninth resistance and the eleventh resistance. The control circuit has the advantages that the circuit can stabilize the wind speed of the blast blower, which is not fluctuated along the fluctuation of the voltage of storage batteries.
Description
Technical field
The utility model relates to a kind of control circuit of stable blower wind speed, belongs to technical field of automotive electronics.
Background technique
As shown in Figure 1, be common control circuit of blower for vehicle air conditioning, in this circuit, with the positive termination battery tension of blower M, negative terminal connects an end of speed adjusting module, and this port feeds back to again in the wind speed control circuit of air-conditioner controller.
When opening the sparking lock key, battery tension has fluctuation, causes blower both end voltage instability, thereby makes the wind speed instability.The client does not allow this phenomenon to occur, and at this situation, need design: when one timing of wind speed gear, make the blower wind speed stable, the control circuit that wind speed does not fluctuate with the fluctuation of battery tension.
Summary of the invention
The purpose of this utility model provides a kind of control circuit of stable blower wind speed.
In order to achieve the above object, the technical solution of the utility model provides a kind of control circuit of stable blower wind speed, it is characterized in that, comprise first integrated operational amplifier, the in-phase input end of first integrated operational amplifier connects and divides hydraulic circuit, divide hydraulic circuit to connect the positive pole of blower, the inverting input of first integrated operational amplifier connects the negative pole of blower by first delay circuit, the inverting input of first integrated operational amplifier is by first delay circuit and the 11 resistance eutral grounding, the 3rd electric capacity and the 6th resistance of cross-over connection parallel connection between the inverting input of first integrated operational amplifier and output terminal, the output terminal of first integrated operational amplifier is by the 8th resistance and the 7th resistance ground connection and connect the inverting input of second integrated operational amplifier respectively, PWM generator inserts the in-phase input end of second integrated operational amplifier by second delay circuit, cross-over connection the 8th electric capacity between the inverting input of second integrated operational amplifier and output terminal, the output terminal of second integrated operational amplifier is by the tenth resistance and the 9th resistance difference ground connection and speed adjusting module, cross-over connection the 7th electric capacity between the 9th resistance and the 11 resistance.
When battery tension upwards fluctuates, be the positive terminal voltage of blower when increasing, draught fan control circuit also increases the voltage of speed adjusting module Blower F/B end (being the blower negative terminal), and the blower both end voltage is remained unchanged, thereby when realizing static stall, the blower wind speed is stable; In like manner, when battery tension fluctuateed downwards, the blower negative terminal voltage also should reduce thereupon, kept the blower both end voltage constant.
The utility model has the advantages that: the utility model can be stablized the blower wind speed, and it is not fluctuateed along with the fluctuation of battery tension.
Description of drawings
Fig. 1 is primary circuit figure;
The physical circuit of the control circuit of a kind of stable blower wind speed that Fig. 2 provides for the utility model.
Embodiment
Specify the utility model below in conjunction with embodiment.
Embodiment
As shown in Figure 1, the physical circuit figure of the control circuit of a kind of stable blower wind speed that provides for the utility model, comprise the first integrated operational amplifier U1B, the in-phase input end 5 of the first integrated operational amplifier U1B connects and divides hydraulic circuit, divide hydraulic circuit to connect the positive pole of blower, divide hydraulic circuit to comprise second resistance R 2, second resistance R 2 and first resistance R 1 of connecting and 4 parallel connections of the 4th resistance R, first capacitor C 1 in parallel on the 4th resistance R 4, the inverting input 6 of the first integrated operational amplifier U1B connects the negative pole of blower by first delay circuit, first delay circuit is the RC delay circuit of being made up of the 3rd resistance R 3 and the 4th capacitor C 4, the inverting input 6 of the first integrated operational amplifier U1B is by first delay circuit and the 11 resistance R 11 ground connection, the 3rd capacitor C 3 and the 6th resistance R 6 of cross-over connection parallel connection between the inverting input 6 of the first integrated operational amplifier U1B and output terminal 7, the output terminal 7 of the first integrated operational amplifier U1B is by the 8th resistance R 8 and the 7th resistance R 7 ground connection and connect the inverting input 2 of the second integrated operational amplifier U2A respectively, PWM generator inserts the in-phase input end 3 of the second integrated operational amplifier U2A by second delay circuit, second delay circuit is the RC delay circuit of being made up of the 5th resistance R 5 and second capacitor C 2, cross-over connection the 8th capacitor C 8 between the inverting input 2 of the second integrated operational amplifier U2A and output terminal 1, the output terminal of the second integrated operational amplifier U2A is by the tenth resistance R 10 and the 9th resistance R 9 difference ground connection and speed adjusting module, cross-over connection the 7th capacitor C 7 between the 9th resistance R 9 and the 11 resistance R 11.
In the drawings, Ui represents battery tension, connects the blower anode; U0 represents the Blower Ctrl signal of draught fan control circuit output, connects 1 pin of speed adjusting module; Uf represents speed adjusting module 2 pin (being the blower negative terminal) voltage, also is the Blower F/B feedback signal of draught fan control circuit; The blower both end voltage is Ui-Uf.The workflow of this circuit is:
When Ui increases → V0 increase → U0 reduce (Blower Ctrl signal reduces) → Uf increase (increases of BlowerF/B feedback signal) → Ui-Uf constant → the blower wind speed stablizes; When Ui reduces → V0 reduces → U0 increase (increases of Blower Ctrl signal) → Uf reduce (Blower F/B feedback signal reduces) → Ui-Uf constant → the blower wind speed stablizes.
Claims (2)
1. the control circuit of a stable blower wind speed, it is characterized in that, comprise first integrated operational amplifier (U1B), the in-phase input end (5) of first integrated operational amplifier (U1B) connects and divides hydraulic circuit, divide hydraulic circuit to connect the positive pole of blower, the inverting input (6) of first integrated operational amplifier (U1B) connects the negative pole of blower by first delay circuit, the inverting input (6) of first integrated operational amplifier (U1B) is by first delay circuit and the 11 resistance (R11) ground connection, the 3rd electric capacity (C3) and the 6th resistance (R6) of cross-over connection parallel connection between the inverting input (6) of first integrated operational amplifier (U1B) and output terminal (7), the output terminal (7) of first integrated operational amplifier (U1B) is by the 8th resistance (R8) and the 7th resistance (R7) ground connection and connect the inverting input (2) of second integrated operational amplifier (U2A) respectively, PWM generator inserts the in-phase input end (3) of second integrated operational amplifier (U2A) by second delay circuit, cross-over connection the 8th electric capacity (C8) between the inverting input (2) of second integrated operational amplifier (U2A) and output terminal (1), the output terminal of second integrated operational amplifier (U2A) is by the tenth resistance (R10) and the 9th resistance (R9) difference ground connection and speed adjusting module, cross-over connection the 7th electric capacity (C7) between the 9th resistance (R9) and the 11 resistance (R11).
2. the control circuit of a kind of stable blower wind speed as claimed in claim 1, it is characterized in that, hydraulic circuit comprised second resistance (R2) in described minute, and second resistance (R2) and first resistance (R1) of connecting and the 4th resistance (R4) parallel connection are gone up first electric capacity in parallel (C1) at the 4th resistance (R4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920070934U CN201382007Y (en) | 2009-04-22 | 2009-04-22 | Control circuit for stabilizing wind speed of blast blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920070934U CN201382007Y (en) | 2009-04-22 | 2009-04-22 | Control circuit for stabilizing wind speed of blast blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201382007Y true CN201382007Y (en) | 2010-01-13 |
Family
ID=41525484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920070934U Expired - Lifetime CN201382007Y (en) | 2009-04-22 | 2009-04-22 | Control circuit for stabilizing wind speed of blast blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201382007Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163948A (en) * | 2010-02-23 | 2011-08-24 | 上海奉天电子有限公司 | Closed-loop control motor driven circuit |
| CN105353815A (en) * | 2015-12-03 | 2016-02-24 | 温州长江汽车电子有限公司 | Device and method for stabilizing voltage across two ends of air blower in automobile air conditioner |
-
2009
- 2009-04-22 CN CN200920070934U patent/CN201382007Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102163948A (en) * | 2010-02-23 | 2011-08-24 | 上海奉天电子有限公司 | Closed-loop control motor driven circuit |
| CN105353815A (en) * | 2015-12-03 | 2016-02-24 | 温州长江汽车电子有限公司 | Device and method for stabilizing voltage across two ends of air blower in automobile air conditioner |
| CN105353815B (en) * | 2015-12-03 | 2017-05-10 | 温州长江汽车电子有限公司 | Method for stabilizing voltage across two ends of air blower in automobile air conditioner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 201800, B, Lane 518, Lane 1, Heng Yong Road, Shanghai, Jiading District 501-1 Patentee after: Shanghai Fengtian Electronic Co., Ltd. Address before: 200331, Shanghai, Gulang Road, Putuo District, Lane 5, building 1570, West 2-3 Patentee before: Shanghai Fengtian Electronic Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100113 |