CN108594733A - Single pin multi signal cooling fan controller and its control method - Google Patents
Single pin multi signal cooling fan controller and its control method Download PDFInfo
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- CN108594733A CN108594733A CN201810790411.3A CN201810790411A CN108594733A CN 108594733 A CN108594733 A CN 108594733A CN 201810790411 A CN201810790411 A CN 201810790411A CN 108594733 A CN108594733 A CN 108594733A
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- 238000001816 cooling Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000005611 electricity Effects 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 4
- 210000001367 artery Anatomy 0.000 claims description 4
- 210000003462 vein Anatomy 0.000 claims description 4
- 230000004888 barrier function Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 6
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- 238000005516 engineering process Methods 0.000 description 4
- 210000000080 chela (arthropods) Anatomy 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 230000009977 dual effect Effects 0.000 description 2
- 238000010197 meta-analysis Methods 0.000 description 2
- 238000003079 width control Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0423—Input/output
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/25—Pc structure of the system
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Abstract
The present invention relates to automobile cooling fan fields, it is related to a kind of single pin multi signal cooling fan controller and its control method, by designing pulse width signal control unit and fault feedback signal control unit, pulse width signal control unit input terminal or control source control signal element are connected to fault feedback signal control unit output end on same wiring pin A, use the wiring pin of a connector, reduce the quantity of wiring pin, manufacturing cost is reduced, realizes a variety of different signals of single pin controlling transmission；And solve the problems, such as that cooling fan operation troubles can not be fed back to engine by the controller of a variety of input signals, the applicability of controller can be increased, reduce the manufacturing cost of controller when realizing identical function.
Description
Technical field
The present invention relates to automobile cooling fan fields, are controlled in particular to a kind of single pin multi signal cooling fan
Device and its control method.
Background technology
Cooling fan of engine is mainly used for the cooling work in automobile engine nacelle, and fan to water cooling by directly condensing
The mode of piece blowing, takes the heat on condensate film out of enging cabin, improves the integral heat sink efficiency of enging cabin, prevent from starting
A series of mechanical breakdowns caused by machine overheat and the dangerous hidden danger that may be brought, it is ensured that traffic safety.Traditional engine is cold
But fan is 4-5 grade resistance-type speed changes, and adjustable speed range is limited big, and without monitoring/protection/information feedback function, it is non-just
The status information when forefan can not effectively be provided under normal working condition to driver in time, it is thus possible to bring traffic safety
Hidden danger.And due to the restriction of shift range, it can not realize that intelligence is accurate to wind speed and adjust.Pulse width modulates (Pulse
Width Modulation abbreviation PWM) control mode has accurately wind speed regulating power.It is a kind of to analog signal level
Digitally coded method is carried out, by the use of high-resolution counter, the duty ratio of square wave is modulated for specific to one
The level of analog signal is encoded.As long as bandwidth is sufficiently wide, any analogue value can be encoded using PWM.Its advantage
It is from processor to controlled system signal to be all digital form, without carrying out digital-to-analogue conversion.Signal is allowed to remain digital shape
Influence of noise can be minimized by formula；Meanwhile analog circuit is controlled by digital form, the cost of system can be greatly lowered
And power consumption.In addition, many microcontrollers (Micro Controller Unit abbreviation MCU) and digital signal processor
(Digital SignalProcessor abbreviation DSP) contains PWM controller on chip, this makes numerically controlled reality
Now become to be more prone to.
Cooling fan of engine controller needs to control multi-signal, including pulsewidth input control signal, control source control
Signal, Lin input controls signal and a variety of output feedback signals processed, signal port only used mostly in currently available technology
Pulsewidth input control signal also has using a variety of input control signals, but when this controller detects equipment fault without
Method feeds back to engine controller, and engine can be caused to work under damage, damaged to engine.But if
It to need to increase connector number of pins again using fault feedback signal, increase connector manufacturing cost, and reduce controller
Applicability.
The single connector of cooling fan of engine controller (single port) generally controls a kind of input or defeated in the prior art
Go out signal, if to control multi-signal, common technological means is to increase connector quantity and signal port quantity, this can lead
The manufacturing cost of controller is caused to increase more, and in certain application scenarios, since space is limited, the quantity and number of pins of connector
Amount is limited, in order to meet function needs, it is necessary to realize control multi-signal in single port, and to be realized in single port
Multi-signal is controlled, the technological means of most critical is exactly to design suitable electronic component combination and connection relation, single port
It is upper need the signal kinds that control more and signal between otherness it is bigger, combined for designing suitable electronic component
It is bigger with the technical difficulty of connection relation, it is contemplated that the possibility of realization is with regard to smaller.
Invention content
The object of the present invention is to provide a kind of single pin multi signal cooling fan controller and its control methods, to solve
The above problem.
To achieve the goals above, technical solution used in the embodiment of the present invention is as follows：
The present invention provides a kind of single pin multi signal cooling fan controllers, including
Pulse width signal control unit, the pulse width signal control unit include pulse width signal control unit input terminal and pulsewidth
Signaling control unit output end；Or
Control source controls signal element, and the control source control signal element includes control source control signal element
Input terminal and control source control signal element output end；With
Fault feedback signal control unit, the fault feedback signal control unit include fault feedback signal control unit
Input terminal and fault feedback signal control unit output end；
The pulse width signal control unit input terminal or control source control signal element input terminal and fault feedback signal
Control unit output end is connected on same wiring pin A,
Wiring pin A input is PWM pulse width signals or voltage signal,
When wiring pin A be PWM pulse width signals when, input for high level when, pulse width signal control unit output end be it is low
Level, input for low level when, pulse width signal control unit output end be high level；
When wiring pin A input voltage signals, it is analog signal that control source, which controls signal element output end,；
The fault feedback signal control unit input terminal receives the signal of certain frequency and pulsewidth, and passes through wiring pin
A is exported.
Further include microprocessor in preferred embodiments of the present invention, the pulse width signal control unit output end or electricity
Press input control signal element output end and fault feedback signal control unit input terminal respectively with the corresponding pin of microprocessor
Electrical connection.
In preferred embodiments of the present invention, the microprocessor includes timer capture unit and micro-control unit, institute
It states pulse width signal control unit output end to connect with timer capture unit, suitable for capturing pulse width signal；
The pulse width signal captured by micro-control unit analyzing processing, when detecting in the event of failure, micro-control unit to therefore
Hinder feedback signal control unit input terminal and send the signal of certain frequency and pulsewidth, and is exported by wiring pin A.Connect with ECU
It connects
In preferred embodiments of the present invention, the pulse width signal control unit includes resistance R38, resistance R39, resistance
R40, capacitance C39, triode Q4 and diode D5；
The collector of the triode Q4 is connect with one end of resistance R39 and pulse width signal control unit output end respectively,
The other end of resistance R39 is grounded, and the emitter of triode Q4 is connect with+5V power supplys, the base stage of triode Q4 respectively with resistance R40
It is connected with one end of resistance R38, the other end of resistance R38 is connect with the emitter of triode Q4, the other end of resistance R40 and two
The anode connection of pole pipe D5, the cathode of diode D5 are connected to ground with wiring pin A and by capacitance C39 respectively.
In preferred embodiments of the present invention, the microprocessor includes AD converter and micro-control unit, the voltage
Input control signal element output end is connect with AD converter, suitable for converting analog signals into digital signal；
The signal converted by AD converter by micro-control unit analyzing processing, when detecting in the event of failure, microcontroller
Unit sends the signal of certain frequency and pulsewidth to fault feedback signal control unit input terminal, and is exported by wiring pin A.
It is connect with ECU
In preferred embodiments of the present invention, the control source control signal element includes resistance R41, resistance R42, two
Pole pipe D7, diode D8 and capacitance C40；Control source control signal element output end successively one end of shunt capacitance C40,
One end of one end of resistance R42 and the cathode and resistance R41 of diode D7, the other end of the capacitance C40, resistance R42 it is another
The anode of one end and diode D7 are connected to ground, and the other end of the resistance R41 is connect with wiring pin A, the diode D8
Cathode connect with+5V power supplys, diode D8 anode with control source control signal element output end connect.
In preferred embodiments of the present invention, the fault feedback signal control unit includes capacitance C34, capacitance C35, electricity
Hold C36, capacitance C37, capacitance C38, resistance R31, resistance R32, resistance R34, resistance R35, resistance R36, triode Q3 and two poles
Pipe D6,
The fault feedback signal control unit input terminal is connect with one end of resistance R35, the other end of the resistance R35
It is connect with the base stage of triode Q3, one end of the capacitance C36 is connect with fault feedback signal control unit input terminal, the electricity
The other end for holding C36 is connected to ground, and the one end the resistance R36 is connect with the base stage of triode Q3, and the other end is connected to ground；
The collector of the triode Q3 is connect by resistance R31 and resistance R34 in parallel with+12V power supplys, three pole
The collector of pipe Q3 is connect with one end of resistance R32, and the other end of resistance R32 is connect with the anode of diode D6, diode D6
Cathode connect with wiring pin A, one end series connection of one end of the capacitance C34 and capacitance C37, the capacitance C34's is another
End is connect with the collector of triode Q3, and the other end of capacitance C37 is connected to ground, one end of the capacitance C35 and capacitance C38's
One end is connected, and the other end of the capacitance C35 is connect with the anode of diode D6, and the other end of capacitance C38 is connected to ground；
The emitter of the triode Q3 is grounded.
Further include power drive unit in preferred embodiments of the present invention, the microprocessor passes through power drive list
Member control brushless motor.
In preferred embodiments of the present invention, the microprocessor, pulse width signal control unit, control source control signal
Unit, fault feedback signal control unit and power drive unit are integrated on one module.
A kind of control method of single pin multi signal cooling fan controller, including
Pulse width signal control unit, the pulse width signal control unit include pulse width signal control unit input terminal and pulsewidth
Signaling control unit output end；Or
Control source controls signal element, and the control source control signal element includes control source control signal element
Input terminal and control source control signal element output end；
Fault feedback signal control unit, the fault feedback signal control unit include fault feedback signal control unit
Input terminal and fault feedback signal control unit output end；And microprocessor
The pulse width signal control unit input terminal or control source control signal element input terminal and fault feedback signal
Control unit output end is connected on same wiring pin A,
Wiring pin A input is PWM pulse width signals or voltage signal,
When wiring pin A be PWM pulse width signals when, input for high level when, pulse width signal control unit output end be it is low
Level, input for low level when, pulse width signal control unit output end be high level；Micro-control unit analyzing processing real-time capture
Pulse width signal, when detecting in the event of failure, micro-control unit sends certain frequency to fault feedback signal control unit input terminal
With the signal of pulsewidth, and exported by wiring pin A；
When wiring pin A input voltage signals, it is analog signal that control source, which controls signal element output end,；Microcontroller list
Meta analysis handles analysis voltage signal, and when detecting in the event of failure, micro-control unit is inputted to fault feedback signal control unit
End sends the signal of certain frequency and pulsewidth, and is exported by wiring pin A.
Compared with the existing technology, the embodiment of the present invention has the advantages that：
An embodiment of the present invention provides a kind of single pin multi signal cooling fan controller and its control methods, by setting
Pulse width signal control unit and fault feedback signal control unit are counted, by pulse width signal control unit input terminal or control source control
Signal element processed and fault feedback signal control unit output end are connected on same wiring pin A, use connector
Wiring pin reduces the quantity of wiring pin, reduces manufacturing cost, realizes a variety of different letters of single pin controlling transmission
Number；And solve the problems, such as that cooling fan operation troubles can not be fed back to engine, energy by the controller of a variety of input signals
The applicability for enough increasing controller, reduces the manufacturing cost of controller when realizing identical function.
Description of the drawings
Present invention will be further explained below with reference to the attached drawings and examples.
Fig. 1 is the system diagram of single pin dual signal cooling fan controller provided by the invention；
Fig. 2 is the circuit diagram of pulse width signal control unit and fault feedback signal control unit；
Fig. 3 is the schematic diagram of single pin dual signal cooling fan controller provided by the invention；
Fig. 4 is the connection relationship diagram of microprocessor and signal input/output terminal.
Specific implementation mode
In conjunction with the accompanying drawings, the present invention is further explained in detail.These attached drawings are simplified schematic diagram, only with
Illustration illustrates the basic structure of the present invention, therefore it only shows the composition relevant to the invention.
Embodiment
Please refer to Fig.1,2 and 4, an embodiment of the present invention provides a kind of single pin multi signal cooling fan controller, packet
Include pulse width signal control unit 1 or control source control signal element 3, microprocessor and fault feedback signal control unit 2, institute
It includes pulse width signal control unit input terminal 11 and pulse width signal control unit output end 12 to state pulse width signal control unit 1；Institute
It includes control source control signal element input terminal 31 and control source control signal element to state control source control signal element 3
Output end 32；The fault feedback signal control unit 2 includes that fault feedback signal control unit input terminal 21 and failure are fed back
Signaling control unit output end 22；As shown in Figures 2 and 4, the pulse width signal control unit output end 12 and microprocessor LIN0
Pin Pin 1 connects, one end of connection capacitance C70 on the LIN0 pin Pins 1 of microprocessor, size 220pF, C70's
The other end is grounded, and control source controls the AN0_0/AMP0/KWAD0/PAD0 pins of signal element output end 32 and microprocessor
Pin 21 connects, fault feedback signal control unit input terminal 21 and microprocessor PP0/EVDD1/KWP0/PWM0_0/ECLK/
FAULT5 pin Pins 61 connect, and the pulse width signal control unit input terminal 11 or control source control signal element input terminal
31 are connected to fault feedback signal control unit output end 22 on same wiring pin A4, and wiring pin A4 inputs are PWM arteries and veins
Bandwidth signals or voltage signal, when wiring pin A4 is PWM pulse width signals, input for high level when, pulse width signal control is single
First output end 12 be low level, input for low level when, pulse width signal control unit output end 12 be high level；Work as wiring pin
A4 input voltage signals, it is analog signal that control source, which controls signal element output end 32,；The fault feedback signal control is single
First input terminal 21 receives the signal of certain frequency and pulsewidth, and is exported by wiring pin A4.
In a specific embodiment, the microprocessor includes timer capture unit and micro-control unit, the arteries and veins
Bandwidth signals control unit output end 12 is connect with timer capture unit, suitable for being captured to pulse width signal；Pass through microcontroller
The pulse width signal that unit analyzing processing captures, when detecting in the event of failure, micro-control unit is to fault feedback signal control unit
Input terminal 21 sends the signal of certain frequency and pulsewidth, and is connect with ECU engine controllers by wiring pin A4 outputs.
Referring to FIG. 2, the pulse width signal control unit 1 includes resistance R38, resistance R39, resistance R40, capacitance C39, three
Pole pipe Q4 and diode D5；The collector of the triode Q4 is defeated with one end of resistance R39 and pulse width signal control unit respectively
Outlet 12 connects, and the other end ground connection of resistance R39, the emitter of triode Q4 is connect with+5V power supplys, the base stage point of triode Q4
It is not connect with one end of resistance R40 and resistance R38, the other end of resistance R38 is connect with the emitter of triode Q4, resistance R40
The anode of the other end and diode D5 connect, the cathode of diode D5 respectively with wiring pin A4 and pass through capacitance C39 with
Connection, the effect of wherein diode D5 is to prevent external voltage signal excessively high, is damaged to internal components, here functions as pincers
The effect of position.
In a specific embodiment, the microprocessor includes AD converter and micro-control unit, the control source
Control signal element output end 32 is connect with AD converter, suitable for converting analog signals into digital signal；Pass through microcontroller list
The signal converted by AD converter of meta analysis processing, when detecting in the event of failure, micro-control unit is to fault feedback signal control
Unit input terminal 21 processed sends the signal of certain frequency and pulsewidth, and is exported by wiring pin A4.It is connect with ECU
Referring to FIG. 2, the control source control signal element 3 includes resistance R41, resistance R42, diode D7, two poles
Pipe D8 and capacitance C40；Control source control signal element output end 32 one end of shunt capacitance C40, resistance R42 successively
One end of the cathode and resistance R41 of one end and diode D7, the other end of the capacitance C40, the other end of resistance R42 and two poles
The anode of pipe D7 is connected to ground, and the other end of the resistance R41 is connect with wiring pin A4, the cathode of the diode D8 with+
5V power supplys connect, and the anode of diode D8 is connect with control source control signal element output end 32.
Referring to FIG. 2, the fault feedback signal control unit 2 includes capacitance C34, capacitance C35, capacitance C36, capacitance
C37, capacitance C38, resistance R31, resistance R32, resistance R34, resistance R35, resistance R36, triode Q3 and diode D6, the event
Barrier feedback signal control unit input terminal 21 is connect with one end of resistance R35, and the other end of the resistance R35 is with triode Q3's
Base stage connects, and one end of the capacitance C36 is connect with fault feedback signal control unit input terminal 21, and the capacitance C36's is another
One end is connected to ground, and the one end the resistance R36 is connect with the base stage of triode Q3, and the other end is connected to ground；The triode Q3
Collector connect with+12V power supplys by parallel resistance R31 and resistance R34, the collector and resistance of the triode Q3
One end of R32 connects, and the other end of resistance R32 is connect with the anode of diode D6, cathode and the wiring pin A4 of diode D6
Connection, one end of the capacitance C34 and one end series connection of capacitance C37, the current collection of the other end and triode Q3 of the capacitance C34
Pole connects, and the other end of capacitance C37 is connected to ground, one end of the capacitance C35 and one end series connection of capacitance C38, the capacitance
The other end of C35 is connect with the anode of diode D6, and the other end of capacitance C38 is connected to ground；The emitter of the triode Q3
Ground connection, the effect of wherein diode D6 is to prevent external voltage signal excessively high, is damaged to internal components, here functions as pincers
The effect of position.
Referring to FIG. 1, further including power drive unit, the microprocessor controls brushless electricity by power drive unit
Machine.
Preferably, the microprocessor, pulse width signal control unit, control source control signal element, failure feedback
Signaling control unit and power drive unit are integrated on one module.
A kind of control method of single pin multi signal cooling fan controller, including
Pulse width signal control unit, the pulse width signal control unit include pulse width signal control unit input terminal 11 and arteries and veins
Bandwidth signals control unit output end 12；Or
Control source controls signal element, and the control source control signal element includes control source control signal element
Input terminal 31 and control source control signal element output end 32；
Fault feedback signal control unit, the fault feedback signal control unit include fault feedback signal control unit
Input terminal 21 and fault feedback signal control unit output end 22；And microprocessor
The pulse width signal control unit input terminal 11 or control source control signal element input terminal 31 are fed back with failure
Signaling control unit output end 22 is connected on same wiring pin A4, and wiring pin A4 inputs are PWM pulse width signals or electricity
Signal is pressed,
When wiring pin A4 be PWM pulse width signals when, input for high level when, pulse width signal control unit output end 12 is
Low level, input for low level when, pulse width signal control unit output end 12 be high level；Micro-control unit analyzing processing is real-time
Pulse width signal is captured, when detecting in the event of failure, micro-control unit sends one to fault feedback signal control unit input terminal 21
Determine the signal of frequency and pulsewidth, and is exported by wiring pin A4；
When wiring pin A4 input voltage signals, it is analog signal that control source, which controls signal element output end 32,；Micro-control
Unit analyzing processing analysis voltage signal processed, when detecting in the event of failure, micro-control unit is to fault feedback signal control unit
Input terminal 21 sends the signal of certain frequency and pulsewidth, and is exported by wiring pin A4.
The microprocessor controls cooling fan, the microprocessor and signal input and output list by power drive unit
The connection relation of member is as shown in Figure 4.
The fault feedback signal that wherein fault feedback signal unit can detect includes power supply open fault, power supply short circuit event
Barrier, supply voltage over-voltage fault, the too low failure of supply voltage, cooling fan blocking failure, cooling fan open fault, cooling wind
Step-out failure, cooling fan over current fault are fanned, these fault feedback signals are the signals of identical frequency different duty.
Operation principle is as follows：
As shown in figure 3, after the power-up, wiring pin A4 input pulse width signals or voltage signal, microprocessor are examined first
The control signal for surveying input is pulse width signal or voltage signal, can will in addition signal carries out all the way after recognizing a kind of signal
Shielding, if the control signal of input is pulse width signal, timer capture unit acquires pulse-width control signal simultaneously in microprocessor
Collected pulse width and frequency are calculated, present engine cooling fan is calculated according to the width of collected pulse width signal
Required rotating speed, if voltage signal when control signal, the ADC in microprocessor collects current input voltage and conversion
For corresponding rotating speed, faulty generation is detected whether every 1ms, during cooling fan is run if faulty occur
Can be out of service by brushless motor cooling fan, it was then restarted every 3 seconds, judges whether to be able to detect that depositing for failure
If continuous start 5 presence for being capable of detecting when failure, the failure that cooling fan controller meeting basis detects
Export the failure feedback control signal of identical frequency different duty.
As shown in Figure 2 and Figure 4, when wiring pin A accesses PWM pulse width signals, when the PWM pulse width signals of input are high electricity
Usually, since the diode D5 effects reversely ended can not generate the voltage for making triode Q4 be connected, triode Q4 is in cut-off
State, as shown in figure 4, the level of output to the PWM_IN of micro processor leg are 0.When the PWM pulse width signals of input are low electricity
Usually, triode Q4 is made to be in saturation state after resistance R38 and resistance R40 partial pressures by diode D5 ,+5V, output is extremely
The PWM_IN signals of micro processor leg are high level, and pulse width signal control unit input terminal 11 is converted by pulse width control unit
The timer capture unit for being connected to microprocessor later captures the pulse width signal of input.When wiring pin A inputs are
When 0-12V voltage signals, microprocessor is by the transmission or analog signal of acquisition to AD converter.Controller detects faulty generation
When, fault feedback signal can export the signal of certain frequency and pulsewidth by the output port of microprocessor, this signal passes through again
Failure feedback control unit is exported to failure feedback interface.Fault-signal exports the pulse width signal of certain frequency, failure feedback letter
Number frequency it is different from the frequency of the pulse width signal of input, fault feedback signal is exported to engine controller ECU, by starting
After machine controller ECU hardware and software filtering, it is fault feedback signal or pulsewidth to facilitate the differentiation of Engine ECU control unit
Output signal, frequency and the pulsewidth of fault feedback signal can be set by the PWM controller of microprocessor.Fault-signal exports
The pulse width signal of certain frequency, the frequency of fault feedback signal is different from the frequency of the pulse width signal of input, fault feedback signal
Output facilitates Engine ECU control to engine controller ECU after engine controller ECU hardware and software filtering
Unit differentiation is fault feedback signal or pulsewidth output signal, and frequency and the pulsewidth of fault feedback signal can pass through microprocessor
The PWM controller of device is set.
It is enlightenment with above-mentioned desirable embodiment according to the present invention, through the above description, relevant staff is complete
Various changes and amendments can be carried out without departing from the scope of the technological thought of the present invention' entirely.The technology of this invention
Property range is not limited to the contents of the specification, it is necessary to determine its technical scope according to right.
Claims (10)
1. a kind of single pin multi signal cooling fan controller, it is characterised in that：Including
Pulse width signal control unit, the pulse width signal control unit include pulse width signal control unit input terminal and pulse width signal
Control unit output end；Or control source controls signal element, the control source control signal element includes control source control
Signal element input terminal processed and control source control signal element output end；With
Fault feedback signal control unit, the fault feedback signal control unit include the input of fault feedback signal control unit
End and fault feedback signal control unit output end；
The pulse width signal control unit input terminal or control source control signal element input terminal are controlled with fault feedback signal
Unit output end is connected on same wiring pin A,
Wiring pin A input is PWM pulse width signals or voltage signal,
When wiring pin A be PWM pulse width signals when, input for high level when, pulse width signal control unit output end be low level,
When input is low level, pulse width signal control unit output end is high level；
When wiring pin A input voltage signals, it is analog signal that control source, which controls signal element output end,；
The fault feedback signal control unit input terminal receives the signal of certain frequency and pulsewidth, and defeated by wiring pin A
Go out.
2. single pin multi signal cooling fan controller as described in claim 1, which is characterized in that
Further include microprocessor, the pulse width signal control unit output end or control source control signal element output end and event
Barrier feedback signal control unit input terminal is electrically connected with the corresponding pin of microprocessor respectively.
3. single pin multi signal cooling fan controller as claimed in claim 2, which is characterized in that
The microprocessor includes timer capture unit and micro-control unit, the pulse width signal control unit output end with it is fixed
When device capturing unit connect, suitable for being captured to pulse width signal；
The pulse width signal captured by micro-control unit analyzing processing, when detecting that in the event of failure, micro-control unit is anti-to failure
Feedback signal control unit input terminal sends the signal of certain frequency and pulsewidth, and is exported by wiring pin A.
4. single pin multi signal cooling fan controller as claimed in claim 3, it is characterised in that：
The pulse width signal control unit includes resistance R38, resistance R39, resistance R40, capacitance C39, triode Q4 and diode
D5；
The collector of the triode Q4 is connect with one end of resistance R39 and pulse width signal control unit output end respectively, resistance
The other end of R39 is grounded, and the emitter of triode Q4 is connect with+5V power supplys, the base stage of triode Q4 respectively with resistance R40 and electricity
One end connection of R38 is hindered, the other end of resistance R38 is connect with the emitter of triode Q4, the other end and diode of resistance R40
The anode connection of D5, the cathode of diode D5 are connected to ground with wiring pin A and by capacitance C39 respectively.
5. single pin multi signal cooling fan controller as claimed in claim 2, which is characterized in that
The microprocessor includes AD converter and micro-control unit, and the control source control signal element output end turns with AD
Parallel operation connects, suitable for converting analog signals into digital signal；
The signal converted by AD converter by micro-control unit analyzing processing, when detecting in the event of failure, micro-control unit
The signal of certain frequency and pulsewidth is sent to fault feedback signal control unit input terminal, and is exported by wiring pin A.
6. single pin multi signal cooling fan controller as claimed in claim 5, which is characterized in that
The control source control signal element includes resistance R41, resistance R42, diode D7, diode D8 and capacitance C40；Institute
State the negative of control source control signal element output end one end of shunt capacitance C40, one end of resistance R42 and diode D7 successively
One end of pole and resistance R41, anode and the ground of the other end of the capacitance C40, the other end of resistance R42 and diode D7 connect
It connects, the other end of the resistance R41 is connect with wiring pin A, and the cathode of the diode D8 is connect with+5V power supplys, diode
The anode of D8 is connect with control source control signal element output end.
7. the single pin multi signal cooling fan controller as described in claim 3 or 5, which is characterized in that
The fault feedback signal control unit includes capacitance C34, capacitance C35, capacitance C36, capacitance C37, capacitance C38, resistance
R31, resistance R32, resistance R34, resistance R35, resistance R36, triode Q3 and diode D6,
The fault feedback signal control unit input terminal is connect with one end of resistance R35, the other end and three of the resistance R35
The base stage of pole pipe Q3 connects, and one end of the capacitance C36 is connect with fault feedback signal control unit input terminal, the capacitance
The other end of C36 is connected to ground, and the one end the resistance R36 is connect with the base stage of triode Q3, and the other end is connected to ground；
The collector of the triode Q3 is connect by resistance R31 and resistance R34 in parallel with+12V power supplys, the triode Q3
Collector connect with one end of resistance R32, the other end of resistance R32 connect with the anode of diode D6, and diode D6's bears
Pole is connect with wiring pin A, one end series connection of one end of the capacitance C34 and capacitance C37, the other end of the capacitance C34 with
The collector of triode Q3 connects, and the other end of capacitance C37 is connected to ground, one end of one end and capacitance C38 of the capacitance C35
Series connection, the other end of the capacitance C35 are connect with the anode of diode D6, and the other end of capacitance C38 is connected to ground；
The emitter of the triode Q3 is grounded.
8. single pin multi signal cooling fan controller as claimed in claim 2, which is characterized in that
Further include power drive unit, the microprocessor controls brushless motor by power drive unit.
9. single pin multi signal cooling fan controller as claimed in claim 8, which is characterized in that
The microprocessor, pulse width signal control unit, control source control signal element, fault feedback signal control unit and
Power drive unit is integrated on one module.
10. a kind of control method of single pin multi signal cooling fan controller, which is characterized in that including
Pulse width signal control unit, the pulse width signal control unit include pulse width signal control unit input terminal and pulse width signal
Control unit output end；Or
Control source controls signal element, and the control source control signal element includes control source control signal element input
End and control source control signal element output end；
Fault feedback signal control unit, the fault feedback signal control unit include the input of fault feedback signal control unit
End and fault feedback signal control unit output end；And microprocessor
The pulse width signal control unit input terminal or control source control signal element input terminal are controlled with fault feedback signal
Unit output end is connected on same wiring pin A,
Wiring pin A input is PWM pulse width signals or voltage signal,
When wiring pin A be PWM pulse width signals when, input for high level when, pulse width signal control unit output end be low level,
When input is low level, pulse width signal control unit output end is high level；Micro-control unit analyzing processing real-time capture pulsewidth
Signal, when detecting in the event of failure, micro-control unit sends certain frequency and arteries and veins to fault feedback signal control unit input terminal
Wide signal, and exported by wiring pin A；
When wiring pin A input voltage signals, it is analog signal that control source, which controls signal element output end,；Micro-control unit point
Analysis processing analysis voltage signal, when detecting in the event of failure, micro-control unit is sent out to fault feedback signal control unit input terminal
Certain frequency and the signal of pulsewidth are sent, and is exported by wiring pin A.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810790411.3A CN108594733A (en) | 2018-07-18 | 2018-07-18 | Single pin multi signal cooling fan controller and its control method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810790411.3A CN108594733A (en) | 2018-07-18 | 2018-07-18 | Single pin multi signal cooling fan controller and its control method |
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|---|---|---|---|---|
| CN111535915A (en) * | 2020-06-03 | 2020-08-14 | 龙城电装（常州）有限公司 | Control circuit for cooling fan controller |
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Application publication date: 20180928 |