CN206668599U

CN206668599U - A kind of automobile fan drive circuit

Info

Publication number: CN206668599U
Application number: CN201720345538.5U
Authority: CN
Inventors: 闵世像
Original assignee: Guangzhou Forward Electrical Appliance Co Ltd
Current assignee: Guangzhou Forward Electrical Appliance Co Ltd
Priority date: 2017-04-01
Filing date: 2017-04-01
Publication date: 2017-11-24
Anticipated expiration: 2027-04-01

Abstract

The utility model discloses a kind of automobile fan drive circuit, including signal sample circuit, single-chip microcomputer, PWM controller, feedback circuit and cooling fan, the output end of the signal sample circuit electrically connects with the input of single-chip microcomputer, the output end of the single-chip microcomputer electrically connects with the input of PWM controller, the output end of the PWM controller electrically connects with cooling fan, the input, output end of the feedback circuit respectively with cooling fan, monolithic mechatronics.A kind of automobile fan drive circuit of the present utility model, the circuit use electron controls technology, and the temperature value of engine operating environments is gathered by thermistor temperature sensor, temperature signal is converted into electric signal by microprocessor；Meanwhile microprocessor show that required rotation speed of the fan value, then the pwm signal exported by microprocessor control the rotating speed of cooling fan by computing, so as to reach the purpose of regulation engine operating environments temperature according to measured value.

Description

A kind of automobile fan drive circuit

Technical field

Automobile fan drive circuit field is the utility model is related to, specially a kind of automobile fan drive circuit.

Background technology

Under the background that low-carbon economy turns into the mainstream of the times, electric machine controller is in acceleration, anxious deceleration and overload etc. in automobile Under operating mode, temperature drastically raises, and controller must have corresponding radiator structure just to can guarantee that power device reliably working, therefore, For the controller of air-cooled structure, the work of fan is particularly important, and with the fast development of automobile industry, people are for automobile Can requirement also more and more higher, and directly affect the steady of automobile as the engine section of automobile core texture, its performance quality Qualitative and dynamic property, car engine cooling system are the important components of engine, dynamic property, economy to engine Have a significant impact with reliability, with the continuous improvement of engine speed and power, the requirement more and more higher to cooling system, vapour Car engine cooling system includes water circulation cooling and electric fan cooling；In recent years, the vapour such as the U.S., Germany, Japan and Sweden Car developed country starts that cooling fan of engine temperature control system is deployed to study, and domestic scholars also gradually pay attention to grinding for this aspect Study carefully, Harbin Institute of Technology carried out the Intelligent Control Research of engine-cooling system, it is proposed that on automobile using motor without The cooling control system of level speed Control cooling fan；University Of Qingdao also have developed a kind of engine blower temperature control hydraulic pressure Drive system, but the research of this aspect also has some problems, depart from the self-contained power fan control system of engine also not into It is ripe, and automotive circuit diagram control has become irreversible trend, the engine cool system as one of automobile important composition System also need to improve, traditional engine-cooling system, it is impossible to be automatically adjusted according to the different operating modes of engine, but automobile makes It is ever-changing with condition, it is certain to like that so that engine cool deficiency or undercooling, cause damage to engine, also Have, the effective power of cooling fan consumption of engine is about 10%, and only 5%~10% is meaningful among these.

Therefore, it is necessary to propose a kind of technical scheme, realize that automobile fan automatically adjusts, so as to reach automotive electronics intelligence The requirement of integration, so as to reach the purpose of regulation engine operating environments temperature；Therefore, it is proposed that a kind of automobile fan drives Dynamic circuit.

Utility model content

The purpose of this utility model is to provide a kind of automobile fan drive circuit, to solve to propose in above-mentioned background technology The problem of.

To achieve the above object, the utility model provides following technical scheme：A kind of automobile fan drive circuit, including letter Number sample circuit, single-chip microcomputer, PWM controller, feedback circuit and cooling fan, the output end and list of the signal sample circuit The input electrical connection of piece machine, the output end of the single-chip microcomputer electrically connect with the input of PWM controller, the PWM controller Output end electrically connected with cooling fan, the input, output end of the feedback circuit is electrically connected with cooling fan, single-chip microcomputer respectively Connect.

Further, the signal sample circuit be gather engine temperature parameter functional integrated circuit, the signal Sample circuit is built-in with thermistor temperature sensor.

Further, the single-chip microcomputer is that the temperature parameter for collecting signal sample circuit is converted into the micro- of pwm signal Processor.

Further, the PWM controller is the controller for the pwm signal that pwm signal is modulated into corresponding dutycycle.

Compared with prior art, the beneficial effects of the utility model are：

A kind of automobile fan drive circuit of the present utility model, the circuit use electron controls technology, pass through temperature-sensitive electricity The temperature value of temperature sensor collection engine operating environments is hindered, temperature signal is converted into electric signal by microprocessor；Together When, microprocessor draws required cooling fan rotation speed value by computing, then pass through microprocessor output according to measured value Pwm signal controls the rotating speed of cooling fan, so as to reach the purpose of regulation engine operating environments temperature, while PWM controller The pwm signal driving cooling fan of corresponding dutycycle is exported, cooling fan is realized stepless speed regulation within the specific limits.

Brief description of the drawings

Fig. 1 is the preferable structured flowchart of the utility model.

Wherein, 1, signal sample circuit, 2, single-chip microcomputer, 3, cooling fan, 4, PWM controller, 5, feedback circuit.

Embodiment

Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belong to the scope of the utility model protection.

Referring to Fig. 1, the utility model provides a kind of technical scheme：A kind of automobile fan drive circuit, including signal are adopted Sample circuit 1, single-chip microcomputer 2, PWM controller 4, feedback circuit 5 and cooling fan 3, the output end of the signal sample circuit 1 with The input electrical connection of single-chip microcomputer 2, the output end of the single-chip microcomputer 2 electrically connect with the input of PWM controller 4, the PWM controls The output end of device 4 processed electrically connects with cooling fan 3, the input, output end of the feedback circuit 5 respectively with cooling fan 3, single Piece machine 2 electrically connects.

The signal sample circuit 1 be gather engine temperature parameter functional integrated circuit, the signal sample circuit 1 It is built-in with thermistor temperature sensor.

The single-chip microcomputer 2 is the microprocessor that the temperature parameter that signal sample circuit 1 collects is converted into pwm signal.

The PWM controller 4 is the controller for the pwm signal that pwm signal is modulated into corresponding dutycycle.PWM controller 4 Be closely related with automobile engine ECU, Engine ECU after sampling analysis cooling system temperature signal, be processed into pwm signal to PWM controller 4, PWM controller 4 export the pwm signal driving cooling fan 3 of corresponding dutycycle, make cooling fan 3 certain again In the range of can be with stepless speed regulation, wherein direct current generator voltage, frequency and power of the dutycycle in cooling fan 3 determines.

In summary, a kind of automobile fan drive circuit of the present utility model, the circuit use electron controls technology, lead to The temperature value of thermistor temperature sensor collection engine operating environments is crossed, temperature signal is converted into electricity by microprocessor Signal；Meanwhile microprocessor draws the required tachometer value of cooling fan 3 by computing, then pass through microprocessor according to measured value The rotating speed of the pwm signal control cooling fan 3 of output, so as to reach the purpose of regulation engine operating environments temperature, while PWM Controller 4 exports the pwm signal driving cooling fan 3 of corresponding dutycycle, cooling fan 3 is realized stepless-adjustment within the specific limits Speed.

While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art, It is appreciated that these embodiments can be carried out with a variety of changes in the case where not departing from principle of the present utility model and spirit, repaiied Change, replace and modification, the scope of the utility model are defined by the appended claims and the equivalents thereof.

Claims

1. a kind of automobile fan drive circuit, it is characterised in that including signal sample circuit (1), single-chip microcomputer (2), PWM controller (4), feedback circuit (5) and cooling fan (3), the output end of the signal sample circuit (1) and the input of single-chip microcomputer (2) Electrical connection, the output end of the single-chip microcomputer (2) electrically connects with the input of PWM controller (4), the PWM controller (4) it is defeated Go out end to electrically connect with cooling fan (3), the input, output end of the feedback circuit (5) respectively with cooling fan (3), monolithic Machine (2) electrically connects.

A kind of 2. automobile fan drive circuit according to claim 1, it is characterised in that：The signal sample circuit (1) It is the functional integrated circuit for gathering engine temperature parameter, the signal sample circuit (1) is built-in with thermistor temp sensing Device.

A kind of 3. automobile fan drive circuit according to claim 1, it is characterised in that：The single-chip microcomputer (2) is to believe The temperature parameter that number sample circuit (1) collects is converted into the microprocessor of pwm signal.

A kind of 4. automobile fan drive circuit according to claim 1, it is characterised in that：The PWM controller (4) be by Pwm signal is modulated into the controller of the pwm signal of corresponding dutycycle.