CN209638067U - A kind of processing of brushless electronic fan PWM speed-regulating signal and stand-by circuit - Google Patents
A kind of processing of brushless electronic fan PWM speed-regulating signal and stand-by circuit Download PDFInfo
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- CN209638067U CN209638067U CN201920228320.0U CN201920228320U CN209638067U CN 209638067 U CN209638067 U CN 209638067U CN 201920228320 U CN201920228320 U CN 201920228320U CN 209638067 U CN209638067 U CN 209638067U
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Abstract
A kind of brushless electronic fan PWM speed-regulating signal processing disclosed in the utility model and stand-by circuit, including the output of PWM filter module, power initiation control module, power supply and standby module, PWM level switch module and pwm signal Shaping Module.Utility model has the advantages that 1, the anti-interference ability of PWM speed-regulating signal can be effectively improved；2, be conducive to accurately identify speed regulation signal, the requirement of quick response revolving speed；3, system starting speed is fast, and circuit structure is simple, and stand-by power consumption is small, and the integrated level of system can be improved；4, the stability of system and reliability increase.
Description
Technical field
The utility model relates to automobile brushless electronic fan arts more particularly to a kind of brushless electronic fan PWM to adjust the speed
Signal processing and stand-by circuit.
Background technique
The idle function of existing automobile brushless electronic fan uses independent circuit control, and circuit structure is complicated, is
System starting speed is slow, and stand-by power consumption is big, and PWM speed-regulating signal anti-interference ability is weak, cannot stable and accurate identification automobile master control hair
Rotary speed instruction out.For today of electronic product cost keen competition, the contradiction between performance and cost is more and more prominent, because
This, which is badly in need of one kind, can effectively improve the simple circuit of structure of the anti-interference ability of PWM speed-regulating signal, raising system starting speed.
Utility model content
The purpose of this utility model be in view of the above-mentioned problems, provide it is a kind of reduce cost, improve anti-interference ability, reduce to
The brushless electronic fan PWM speed-regulating signal of machine power consumption handles and stand-by circuit.
In order to achieve the above objectives, the utility model uses following technical proposal: a kind of brushless electronic fan PWM speed regulation
Signal processing and stand-by circuit, including the output of PWM filter module, power initiation control module, power supply and standby module, PWM electricity
Flat conversion module and pwm signal Shaping Module, the PWM filter module access master control speed-regulating signal, output signal access electricity
Source starts control module；The output signal access power supply output of the power initiation control module and standby module, the power supply
Out-put supply signal of the output with standby module output for remaining power supply of system, the power supply output and standby module access electricity
Source voltage, the power supply output receive MCU with standby module and control signal；The PWM filter module is through PWM level switch module
PWM signal shaping module is accessed, the pwm signal Shaping Module output is used for transmission the output signal read to MCU.
In above-mentioned brushless electronic fan PWM speed-regulating signal processing with stand-by circuit, the PWM filter module includes the
One inductance, first resistor and first capacitor；Described first resistor one end connects the first inductance, and the other end is connect by first capacitor
Ground；First inductance accesses master control speed-regulating signal.
Through the above technical solutions, the PWM filter module being made of the first inductance L1, first resistor R1, first capacitor C1
Low-pass filtering is carried out, the high frequency spurs generated in signal transmission is filtered out, improves anti-interference ability.
In above-mentioned brushless electronic fan PWM speed-regulating signal processing and stand-by circuit, the power initiation control module
Including second resistance, the first zener diode, 3rd resistor, the second capacitor, the 4th resistance, the first triode；Second electricity
Resistance connection first resistor and first capacitor junction, the second resistance other end are connected to the first triode by 3rd resistor
Base stage；The junction of the second resistance and 3rd resistor is grounded by the first zener diode；First triode
For base stage by the second capacity earth, second capacitor is parallel with the 4th resistance, the emitter ground connection of first triode；Institute
The cathode for stating the first zener diode is connected to the junction of second resistance and 3rd resistor, the sun of first zener diode
Pole ground connection.
In above-mentioned brushless electronic fan PWM speed-regulating signal processing with stand-by circuit, the power supply is exported and standby mould
Block includes the second triode, the 8th resistance, the 9th resistance, the 4th triode, the 6th resistance, the 5th resistance, third capacitor, third
Triode, the 7th resistance, the 4th capacitor；The collector of second triode is connect with the collector of the first triode, and is led to
The base stage that the 8th resistance accesses the 4th triode is crossed, passes through the 9th resistance between the 8th resistance and the base stage of the 4th triode
Supply voltage is accessed, the emitter of the 4th triode accesses supply voltage；The base stage of second triode passes through the 5th
Resistance eutral grounding, the 5th resistor coupled in parallel third capacitor；The base stage of second triode is connected to the current collection of third transistor
Pole, the emitter ground connection of the third transistor, the collector of the third transistor are connected to the four or three by the 6th resistance
The collector of pole pipe and export out-put supply signal；The base stage of the third transistor accesses MCU control by the 7th resistance
Signal；4th capacitor one end access MCU controls signal, other end ground connection.
In above-mentioned brushless electronic fan PWM speed-regulating signal processing and stand-by circuit, the pwm signal Shaping Module packet
Include twelfth resistor, the 5th capacitor, thirteenth resistor, the 6th capacitor of the 14th resistance, comparator, the 15th resistance, the 7th electricity
Hold；Described twelfth resistor one end connects the cathode of the second zener diode, and the other end connects the anode of comparator, the comparison
The anode of device is by the 5th capacity earth, and the cathode of the comparator is by the 14th resistance eutral grounding, and the 14th resistance is simultaneously
It is associated with the 6th capacitor；The cathode of the comparator accesses a voltage, the output end of the comparator by thirteenth resistor
By the 7th capacity earth, the output end of the comparator accesses a voltage, the output of the comparator by the 15th resistance
Hold output signal output；The voltage value of the voltage is 5V.
Compared with prior art, utility model has the advantages that 1, the anti-interference of PWM speed-regulating signal can be effectively improved
Ability 2 is conducive to accurately identify speed regulation signal, the requirement of quick response revolving speed；3, system starting speed is fast, circuit structure letter
Single, stand-by power consumption is small, and the integrated level of system can be improved；4, the stability of system and reliability increase.
Detailed description of the invention
Fig. 1 is the utility model circuit structure diagram.
In figure, 1-PWM filter module；2- power initiation control module；The output of 3- power supply and standby module；4-PWM level
Conversion module；5-PWM signal shaping module；Vcc- supply voltage；ECU_PWM- master control speed-regulating signal；VOUT- out-put supply letter
Number；MCUI/OCONTROL-MCU controls signal；PWMTOMCU- output signal；The first inductance of L1-；R1- first resistor；C1-
One capacitor；R2- second resistance；R3- 3rd resistor；The 4th resistance of R4-；The first zener diode of Z1-；The second capacitor of C2-；Q1-
First triode；The second triode of Q2-；The 5th resistance of R5-；The 6th resistance of R6-；The 7th resistance of R7-；The 8th resistance of R8-；R9-
9th resistance；C3- third capacitor；Q3- third transistor；The 4th triode of Q4-；The 4th capacitor of C4-；The tenth resistance of R10-；
The second zener diode of Z2-；R11- eleventh resistor；The 12nd diode of R12-；The 5th capacitor of C5-；The 6th capacitor of C6-；
R13- thirteenth resistor；The 14th resistance of R14-；D- comparator；The 7th capacitor of C7-；The 15th resistance of R15-；GND-.
Specific embodiment
Refering to shown in attached drawing, a kind of brushless electronic fan PWM speed-regulating signal processing and stand-by circuit, including PWM filter mould
Block 1, power initiation control module 2, power supply output and standby module 3, PWM level switch module 4 and pwm signal Shaping Module
5, the PWM filter module 1 accesses master control speed-regulating signal ECU_PWM, and output signal PWMTOMCU accesses power initiation control
Module 2；Output signal PWMTOMCU access power supply output and standby module 3, the power supply of the power initiation control module 2
Out-put supply signal VOUT of the output with the output of standby module 3 for remaining power supply of system, the power supply output and standby module 3
Power source voltage Vcc is accessed, the power supply output receives MCU with standby module 3 and controls signal MCUI/OCONTROL；The PWM
Filter module 1 accesses pwm signal Shaping Module 5 through PWM level switch module 4, and the output of pwm signal Shaping Module 5 is used for
It is transmitted to the output signal PWMTOMCU of MCU reading.
Further, the PWM filter module 1 includes the first inductance L1, first resistor R1 and first capacitor C1；It is described
The one end first resistor R1 connects the first inductance L1, and the other end is grounded GND by first capacitor C1；The first inductance L1 access is total
Control speed-regulating signal ECU_PWM.
Further, the power initiation control module 2 includes second resistance R2, the first zener diode Z1, third
Resistance R3, the second capacitor C2, the 4th resistance R4, the first triode Q1；The second resistance R2 connection first resistor R1 and first
The junction capacitor C1, the second resistance R2 other end are connected to the base stage of the first triode Q1 by 3rd resistor R3；It is described
The junction of second resistance R2 and 3rd resistor R3 are grounded GND by the first zener diode Z1；The first triode Q1's
Base stage is grounded GND by the second capacitor C2, and the second capacitor C2 is parallel with the 4th resistance R4, the first triode Q1's
Emitter is grounded GND；The cathode of the first zener diode Z1 is connected to the junction of second resistance R2 and 3rd resistor R3,
The plus earth GND of the first zener diode Z1.
Further, the power supply output and standby module 3 include the second triode Q2, the 8th resistance R8, the 9th electricity
Hinder R9, the 4th triode Q4, the 6th resistance R6, the 5th resistance R5, third capacitor C3, third triode Q3, the 7th resistance R7, the
Four capacitor C4；The collector of the second triode Q2 is connect with the collector of the first triode Q1, and passes through the 8th resistance R8
The base stage of the 4th triode Q4 is accessed, is connect between the 8th resistance R8 and the base stage of the 4th triode Q4 by the 9th resistance R9
Enter power source voltage Vcc, the emitter of the 4th triode Q4 accesses power source voltage Vcc；The base stage of the second triode Q2
GND, the 5th resistance R5 parallel connection third capacitor C3 are grounded by the 5th resistance R5；The base stage of the second triode Q2 connects
To the collector of third transistor Q3, the emitter of the third transistor Q3 is grounded GND, the current collection of the third transistor Q3
Pole is connected to the collector of the 4th triode Q4 by the 6th resistance R6 and exports out-put supply signal VOUT；Described 3rd 3
The base stage of pole pipe Q3 accesses MCU by the 7th resistance R7 and controls signal MCUI/OCONTROL；4th capacitor C4 mono- termination
Enter MCU control signal MCUI/OCONTROL, the other end is grounded GND.
Further, the pwm signal Shaping Module 5 includes twelfth resistor, the 5th capacitor C5, thirteenth resistor
R13, the 6th capacitor C6 of the 14th resistance R14, comparator D, the 15th resistance R15, the 7th capacitor C7；The twelfth resistor one
The cathode of the second zener diode Z2 of end connection, the other end connect the anode of comparator D, and the anode of the comparator D passes through the
Five capacitor C5 are grounded GND, and the cathode of the comparator D is grounded GND by the 14th resistance R14, and the 14th resistance R14 is simultaneously
It is associated with a 6th capacitor C6；The cathode of the comparator D accesses a voltage, the comparator D by thirteenth resistor R13
Output end GND is grounded by the 7th capacitor C7, the output end of the comparator D accesses a voltage by the 15th resistance R15,
The output end output signal output PWMTOMCU of the comparator D；The voltage value of the voltage is 5V.The unit of resistance in attached drawing
It is ohm.
The working principle of the utility model are as follows: the PWM tach signal that automobile master control issues is connected to ECU_PWM, by first
The progress low-pass filtering of PWM filter module 1 of inductance L1, first resistor R1, first capacitor C1 composition, filter out and generate in signal transmission
High frequency spurs.
Subsequent pwm signal is transmitted to the second resistance R2 of power initiation control module 2, when PWM high level, through the second electricity
Resistance R2,3rd resistor R3, the 4th resistance R4 partial pressure are given to the base stage of the first triode Q1, and Q1 saturation conduction, the current collection of Q1 is extremely
Low level, so that the junction of the 8th resistance R8 and the second triode Q2 are low level, which is made by the 8th resistance R8
Power source voltage Vcc is connected to, to its of automobile turn-key system by the 4th triode Q4 saturation conduction with out-put supply signal VOUT
Its part powers；Meanwhile it being divided by the 6th resistance R6 and the 5th resistance R5 to the second triode Q2, the second triode Q2 saturation
Conducting guarantees PWM the 4th triode Q4 saturation conduction in low level, stablizes to system power supply, when needing to enter standby,
MCU controls signal MCUI/OCONTROL by MCU and provides high level to the 7th resistance R7, and third three-level is made to guarantee adequate food Q3 and conducting,
To make the second triode Q2 base stage low level, the two or three pole Q3 pipe cut-off, and then make the 4th triode Q4 cut-off, stop to
System power supply, entrance are standby.
Pwm signal is given to PWM level switch module 4 after the filtering of PWM filter module 1, by the tenth resistance R10 and the tenth
After one resistance R11 partial pressure, the positive input terminal of comparator D is given to by twelfth resistor R12, with the reference level of negative input end into
Row compares；The benchmark of negative input end is divided to obtain by thirteenth resistor R13 and the 14th resistance R14 to 5V, after comparing
As a result it is exported by the output end of comparator D, completes PWM signal shaping, the pwm signal after level conversion and shaping passes through
MCU control signal MCUI/OCONTROL is transmitted to MCU reading, can accurately read the speed command that automobile master control provides.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Although supply voltage VCC is used more herein；First inductance L1, first resistor R1, first capacitor C1, first
The terms such as zener diode Z1, the second capacitor C2, the first triode Q1, but it does not exclude the possibility of using other terms.Make
It is used for the purpose of being more convenient to describe and explain the essence of the utility model with these terms；It is construed as any attached
The limitation added is all contrary to the spirit of the present invention.
Claims (8)
1. a kind of brushless electronic fan PWM speed-regulating signal processing and stand-by circuit, including PWM filter module (1), power initiation control
Molding block (2), power supply output and standby module (3), PWM level switch module (4) and pwm signal Shaping Module (5), feature
Be: the PWM filter module (1) accesses master control speed-regulating signal (ECU_PWM), and output signal accesses power initiation and controls mould
Block (2)；Output signal access power supply output and standby module (3) of the power initiation control module (2), the power supply output
Out-put supply signal (VOUT) with standby module (3) output for remaining power supply of system, the power supply output and standby module
(3) supply voltage (Vcc) is accessed, the power supply output receives MCU control signal (MCUI/OCONTROL) with standby module (3)；
The PWM filter module (1) accesses pwm signal Shaping Module (5) through PWM level switch module (4), the pwm signal shaping
Module (5) output is used for transmission the output signal (PWMTOMCU) read to MCU.
2. brushless electronic fan PWM speed-regulating signal processing according to claim 1 and stand-by circuit, which is characterized in that institute
Stating PWM filter module (1) includes the first inductance (L1), first resistor (R1) and first capacitor (C1)；The first resistor (R1)
One end connects the first inductance (L1), and the other end passes through first capacitor (C1) ground connection (GND)；First inductance (L1) accesses master control
Speed-regulating signal (ECU_PWM).
3. brushless electronic fan PWM speed-regulating signal processing according to claim 1 and stand-by circuit, which is characterized in that institute
Stating power initiation control module (2) includes second resistance (R2), the first zener diode (Z1), 3rd resistor (R3), the second electricity
Hold (C2), the 4th resistance (R4), the first triode (Q1)；Second resistance (R2) connection first resistor (R1) and first capacitor
(C1) junction, second resistance (R2) other end are connected to the base stage of the first triode (Q1) by 3rd resistor (R3)；
The junction of the second resistance (R2) and 3rd resistor (R3) passes through the first zener diode (Z1) ground connection (GND)；Described
The base stage of one triode (Q1) is grounded (GND) by the second capacitor (C2), second capacitor (C2) the 4th resistance (R4) in parallel,
The emitter of first triode (Q1) is grounded (GND).
4. brushless electronic fan PWM speed-regulating signal processing according to claim 3 and stand-by circuit, which is characterized in that institute
The junction for stating second resistance (R2) and 3rd resistor (R3) is connect with the cathode of the first zener diode (Z1), and described first is steady
Press the plus earth (GND) of diode (Z1).
5. brushless electronic fan PWM speed-regulating signal processing according to claim 1 and stand-by circuit, which is characterized in that institute
It includes the second triode (Q2), the 8th resistance (R8), the 9th resistance (R9), the four or three pole that power supply output, which is stated, with standby module (3)
Manage (Q4), the 6th resistance (R6), the 5th resistance (R5), third capacitor (C3), third transistor (Q3), the 7th resistance (R7), the
Four capacitors (C4)；The collector of second triode (Q2) is connect with the collector of the first triode (Q1), and passes through the 8th
Resistance (R8) accesses the base stage of the 4th triode (Q4), leads between the 8th resistance (R8) and the base stage of the 4th triode (Q4)
The 9th resistance (R9) access supply voltage (Vcc) is crossed, the emitter of the 4th triode (Q4) accesses supply voltage (Vcc)；
The base stage of second triode (Q2) passes through the 5th resistance (R5) ground connection (GND), the 5th resistance (R5) third electricity in parallel
Hold (C3)；The base stage of second triode (Q2) is connected to the collector of third transistor (Q3), the third transistor
(Q3) emitter is grounded (GND), and the collector of the third transistor (Q3) is connected to the four or three by the 6th resistance (R6)
The collector and out-put supply signal (VOUT) of pole pipe (Q4)；The base stage of the third transistor (Q3) passes through the 7th resistance
(R7) access MCU control signal (MCUI/OCONTROL)；4th capacitor one end (C4) accesses MCU and controls signal (MCUI/
OCONTROL), other end ground connection (GND).
6. brushless electronic fan PWM speed-regulating signal processing according to claim 1 and stand-by circuit, which is characterized in that institute
It states PWM level switch module (4) and includes the tenth resistance (R10), eleventh resistor (R11), the second zener diode (Z2), it is described
Tenth resistance one end (R10) connects the junction of first resistor (R1) and second resistance (R2), and the other end passes through eleventh resistor
(R11) it is grounded (GND), the eleventh resistor (R11) is in parallel with the second zener diode (Z2), second zener diode
(Z2) plus earth (GND).
7. brushless electronic fan PWM speed-regulating signal processing according to claim 1 and stand-by circuit, which is characterized in that institute
Stating pwm signal Shaping Module (5) includes twelfth resistor (R12), the 5th capacitor (C5), thirteenth resistor (R13), the 14th electricity
Hinder (R14), the 6th capacitor (C6), comparator (D), the 15th resistance (R15), the 7th capacitor (C7)；The twelfth resistor
(R12) cathode of one end connection the second zener diode (Z2), the other end connect the anode of comparator (D), the comparator (D)
Anode by the 5th capacitor (C5) ground connection (GND), the cathode of the comparator (D) passes through the 14th resistance (R14) ground connection
(GND), the 14th resistance (R14) the 6th capacitor (C6) in parallel；The cathode of the comparator (D) passes through thirteenth resistor
(R13) voltage is accessed, the output end of the comparator (D) is grounded (GND) by the 7th capacitor (C7), the comparator (D)
Output end accesses voltage, the output end output signal output of the comparator (D) by the 15th resistance (R15)
(PWMTOMCU)。
8. brushless electronic fan PWM speed-regulating signal processing according to claim 7 and stand-by circuit, which is characterized in that institute
The voltage value for stating voltage is 5V.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920228320.0U CN209638067U (en) | 2019-02-21 | 2019-02-21 | A kind of processing of brushless electronic fan PWM speed-regulating signal and stand-by circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920228320.0U CN209638067U (en) | 2019-02-21 | 2019-02-21 | A kind of processing of brushless electronic fan PWM speed-regulating signal and stand-by circuit |
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| CN209638067U true CN209638067U (en) | 2019-11-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112039317A (en) * | 2020-09-16 | 2020-12-04 | 绍兴文理学院 | Automobile fan standby zero-power-consumption control circuit in PWM control mode |
-
2019
- 2019-02-21 CN CN201920228320.0U patent/CN209638067U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112039317A (en) * | 2020-09-16 | 2020-12-04 | 绍兴文理学院 | Automobile fan standby zero-power-consumption control circuit in PWM control mode |
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