CN208651111U - A kind of low cost water pump control circuit - Google Patents
A kind of low cost water pump control circuit Download PDFInfo
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- CN208651111U CN208651111U CN201821066186.0U CN201821066186U CN208651111U CN 208651111 U CN208651111 U CN 208651111U CN 201821066186 U CN201821066186 U CN 201821066186U CN 208651111 U CN208651111 U CN 208651111U
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- water pump
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- control circuit
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Abstract
The utility model relates to water pump actuation techniques fields, specifically disclose a kind of inexpensive water pump control circuit, including output driving route and state acquisition route；The output driving route accesses level microcontroller signal, and output phase should act on the level signal of water pump；The state acquisition route accesses the level signal, exports corresponding state acquisition signal.A kind of inexpensive water pump control circuit provided by the utility model, compared with prior art, circuit design is simpler, and for component using less, the space of a whole page reduction of integrated IC, design cost is lower.
Description
Technical field
The utility model relates to water pump actuation techniques field more particularly to a kind of inexpensive water pump control circuits.
Background technique
The development of the development of automobile industry, especially new energy electric motor vehicle, so that more and more pumps are applied to automobile
Industry.In vehicle complete vehicle system, these pumps are typically used in automobile cooling system and air pressurizing unit such as battery is cooling,
And it is used to the automobiles heat circulating systems such as auxiliary internal heating.
Water pump in automobile air conditioner control system more to be related to using but the generally existing circuit of existing water pump control circuit is multiple
Miscellaneous, component is larger using the space of a whole page that is more, integrating IC, design cost is higher.
Summary of the invention
The technical issues of the utility model provides a kind of inexpensive water pump control circuit, solution is: existing water pump control electricity
The generally existing circuit in road is complicated, component is larger using the space of a whole page that is more, integrating IC, design cost is higher.
In order to solve the above technical problems, the utility model uses following technical scheme:
A kind of low cost water pump control circuit, including output driving route and state acquisition route；The output driving line
Level microcontroller signal is accessed on road, and output phase should act on the level signal of water pump；The state acquisition route accesses the electricity
Ordinary mail number exports corresponding state acquisition signal.
Preferably, the output driving route is equipped with first resistor R1, second resistance R2,3rd resistor R3, the one or three pole
The level microcontroller signal is accessed in pipe Q1 and first capacitor C1, one end of the first resistor R1, other end connection described the
The base stage (B) of one triode Q1 and one end of the second resistance R2, the other end ground connection of the second resistance R2, described first
The collector (C) of triode Q1 connects one end of the first capacitor C1 as drive output, the first triode Q1's
Emitter (E) connects the one end the 3rd resistor R3, the other end ground connection of the 3rd resistor R3 and the first capacitor C1.
Preferably, the state acquisition route is equipped with the 4th resistance R4, the 5th resistance R5, voltage-stabiliser tube D, the second capacitor C2；
The 4th resistance R4 and the 5th resistance R5 is sequentially connected in series between the collector (C) and ground of the first triode Q1, described
Voltage-stabiliser tube D differential concatenation is connected in parallel on the negative pole end of the voltage-stabiliser tube D in the both ends of the 5th resistance R5, the second capacitor C2
Between positive terminal, the common connection end of the 4th resistance R4 and the 5th resistance R5 exports the state as acquisition output end
Acquire signal.Preferably, the acquisition output end and the drive output are respectively connected to the driving input of water pump internal wiring
The signal acquisition terminal at end and water pump internal wiring MCU.
Preferably, the water pump internal wiring is equipped with the second triode (Q2), the 6th resistance (R6), MCU, the 7th resistance
(R7) and the 8th resistance (R8)；The collector (C) of second triode (Q2) is the driving input terminal of water pump internal wiring,
Emitter (E) ground connection, base stage (B) connect the driving end that the 8th resistance (R8) connects the MCU afterwards；Power supply (VCC) passes through
6th resistance (R6) connects the collector (C) of second triode (Q2), the collector of second triode (Q2)
(C) power input of the MCU is also connected by the 7th resistance (R7).
Specifically, the state acquisition signal is the level signal of second triode (Q2), the signal acquisition
Hold the belonging MCU.
Specifically, the MCU determines the working condition of water pump by analyzing the drop-down level time of the level signal；Institute
Working condition is stated to include dry turn, stall, excess temperature, be lower than lowest speed and normal work.
Specifically, the MCU diagnoses the inexpensive water pump by analyzing the size of the collection voltages of the level signal
The abnormality of control circuit；The abnormality includes to power supply short circuit, shorted to earth or open circuit.
A kind of inexpensive water pump control circuit provided by the utility model, compared with prior art, circuit design is simpler, member
For device using less, the space of a whole page reduction of integrated IC, design cost is lower.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of inexpensive water pump control circuit provided by the embodiment of the utility model；
Fig. 2 is water pump internal wiring schematic diagram provided by the embodiment of the utility model；
Fig. 3 is pump working state provided by the embodiment of the utility model and its corresponding waveform diagram.
Specific embodiment
The embodiments of the present invention is specifically illustrated with reference to the accompanying drawing, and embodiment is only given in order to illustrate mesh
, it can not be interpreted as the restriction to the utility model, including attached drawing is only for reference and illustrates use, do not constituted practical new to this
The limitation of type scope of patent protection, because on the basis of not departing from the spirit and scope of the utility model, it can be to the utility model
Carry out many changes.
The utility model embodiment provides a kind of inexpensive water pump control circuit, and catenation principle is as shown in Figure 1, include defeated
Driver circuit 1 and state acquisition route 2 out；The output driving route 1 accesses level microcontroller signal, and output phase should act on
The level signal of water pump；The state acquisition route 2 accesses the level signal, exports corresponding state acquisition signal.At this
Input terminal Pump_PWM_CTRL is driven to access from the output driving route 1 in utility model embodiment, from the output driving
The driving outlet Pump_Out outputs level signals of route 1, and the acquisition output end Pump_ from the state acquisition route 2
Diag exports corresponding state acquisition signal.
As shown in Figure 1, the output driving route 1 is equipped with first resistor R1, second resistance R2,3rd resistor R3, first
Triode Q1 and first capacitor C1.First resistor R1, second resistance R2,3rd resistor R3 play the role of partial pressure, first capacitor C1
For electrostatic protection capacitor.The level microcontroller signal, other end connection described first are accessed in one end of the first resistor R1
The base stage (B) of triode Q1 and one end of the second resistance R2, the other end ground connection of the second resistance R2, the described 1st
The collector (C) of pole pipe Q1 connects one end of the first capacitor C1, the hair of the first triode Q1 as drive output
Emitter-base bandgap grading (E) connects the one end the 3rd resistor R3, the other end ground connection of the 3rd resistor R3 and the first capacitor C1.
As shown in Figure 1, the state acquisition route 2 is equipped with the 4th resistance R4, the 5th resistance R5, voltage-stabiliser tube D, the second capacitor
C2, the 4th resistance R4, the 5th resistance R5 play the role of partial pressure, and the second capacitor C2 is filter capacitor.The 4th resistance R4 and
Five resistance R5 are sequentially connected in series between the collector (C) and ground of the first triode Q1, and the voltage-stabiliser tube D differential concatenation is in institute
The both ends of the 5th resistance R5 are stated, the second capacitor C2 is connected in parallel between the negative pole end and positive terminal of the voltage-stabiliser tube D, and described
The common connection end of four resistance R4 and the 5th resistance R5 exports the state acquisition signal as acquisition output end.
In the preferred embodiment of the present invention, when the first triode Q1 is in magnifying state, due to Pump_
PWM CTRL=5V, R1=R2=2.2K Ω, i.e. base voltage Ub=5*2.2/ (2.2+2.2)=2.5V, then conducting voltage
U0=2.5-0.7=1.8V.First triode Q1 is to be constantly in amplification region, and when being shorted to 12V, therefore power is P=(12-
1.8) * (1.8/150)=122mW < 250mW (maximum power dissipation of triode Q1), so that triode will not be damaged.Simultaneously because few
The triode of shutdown, cost are optimized.This control circuit contains only that there are five resistance, two capacitors, one three at this time
Pole pipe, a voltage-stabiliser tube, cost is extremely low, and Layout area is small.
In a more complete embodiment, the acquisition output end and the drive output are respectively connected to inside water pump
The driving input terminal and signal acquisition terminal of route 3.
As shown in Fig. 2, the water pump internal wiring 3 is equipped with the second triode Q2, the 6th resistance R6 and MCU；Described second
The collector (C) of triode Q2 is the driving input terminal of water pump internal wiring 3, emitter (E) ground connection, base stage (B) connection institute
State the driving end of MCU；Power supply VCC by the 6th resistance R6 connect the second triode Q2 collector (C) and
The power input of the MCU.
The second triode Q2 is pulled down inside water pump, and low level time is pulled down by it to confirm which kind of state water pump is in
(dry to turn, stall, excess temperature, be lower than lowest speed, work normally), it is low level to acquire water pump drawing to be connected to MCU by Pump_Diag at this time
Time, and then judge which kind of state water pump is in, as shown in Figure 3.
For the small water pump control circuit in design low cost, space, circuit such as Fig. 1 is designed.Water pump internal circuit pull-up the 6th
Resistance R6 (2.2K) arrives power supply VCC, and when control circuit Pump_PWM_CTRL output is high level, Pump_Out is low electricity at this time
It is flat；When control circuit Pump_PWM_CTRL output is low level, Pump_Out is high level (Upump) at this time.
When Pump_PWM_CTRL output high level, the first triode Q1 is electrically connected to by first resistor R1, then first
Triode Q1 conducting, due to R3=150 Ω, the collection radio of R6=2.7K Ω, VCC=12V, Q2 press UQ2C=0.1V, thus it is described
Voltage Upwm=(Upump-Q5ce) * R5*/(R5+R6)+UQ2 at the collector (C) of second triode Q2CE=(12-0.1) *
150/ (150+2700)+0.1=0.72V, as low level can drive water pump normally to turn when MCU checks the low level
It is dynamic.Otherwise Pump_PWM_CTRL exports low level, then the first triode Q1 is not turned on, then the voltage that Upwm is detected is
High level, water pump will stop operating.
When automatically detecting failure inside water pump, MCU detects the turn-on time of the second triode Q2.When water pumps out
Existing failure is dry when turning, and the second triode Q2 opens 1S, and break 1S, then the MCU of water pump internal wiring, passes through R4=82K Ω, R5=
100K Ω, then Pump_Diag is low level voltage when triode Q2 conducting, when triode Q2 shutdown, Pump_Diag
Level=12*100/ (100+82+2.7)=6.49V, 6.49V voltage are held by voltage-stabiliser tube D, and Pump_Diag is high level electricity
Pressure.Therefore if MCU reads 1S high level, 1S low level, just water pump is dry turns failure for performance.
The MCU of water pump internal wiring is connected situation by Pump_PWM CTRL network-control the first triode Q1 and controls water
Pump, when water pumps out abnormal signal, water pump inside can control the turn-on time of the second triode Q2, and MCU sentences according to the turn-on time
Fixed water pump at this time be in it is dry turn or stall, excess temperature, lower than lowest speed, the working condition of normal work.Different work
The turn-on time relationship of second triode Q2 corresponding to state is as shown in Figure 3.
The water pump internal wiring further includes the 7th resistance (R7), the 8th resistance (R8), the 7th resistance (R7) setting
Between the collector (C) and the MCU of water pump internal wiring of the second triode (Q2), the 8th resistance (R8) is arranged second
Between the base stage (B) and the MCU of water pump internal wiring of triode (Q2).7th resistance (R7) is used to prevent outer signals from breaking
MCU plays defencive function, and the 8th resistance (R8) plays metering function, is connected triode Q2.
The MCU of the water pump internal wiring by analyze the size of the collection voltages of the level signal diagnose it is described it is low at
The abnormality of this water pump control circuit；The abnormality includes to power supply short circuit, shorted to earth or open circuit.When short to power supply
Lu Shi, Pump_Diag collection voltages are 5V always；And the Pump_Diag collection voltages one at this time when shorted to earth or open circuit
It is directly 0V.
Due to vehicle-mounted product, connector needs are shorted to power supply or GND experiment (simulates vehicle and is possible to harness scaling
Or connect the GND heart patient's condition), when Pump_Out network short is to power supply 12V, then Pumg_Diag will read always height
Level 5V, to judge the case where it is is shorted to power supply.To be diagnosed to be this Pump_Out of external world this root line, whether short circuit shows
As.Pump_PWM_CTRL signal will not connect GND or open circuit when perhaps opening a way when Pump_Out network is to GND short circuit, because
It is controlled for Pump_PWM_CTRL by MCU.
A kind of inexpensive water pump control circuit provided by the embodiment of the utility model, compared with prior art, circuit design is more
Simply, for component using less, the space of a whole page reduction of integrated IC, design cost is lower.
Above-described embodiment is the preferable embodiment of the utility model, but the embodiments of the present invention is not by above-mentioned
The limitation of embodiment, it is made under other any spiritual essence and principles without departing from the utility model to change, modify, replacing
In generation, simplifies combination, should be equivalent substitute mode, is included within the protection scope of the utility model.
Claims (8)
1. a kind of low cost water pump control circuit, it is characterised in that: including output driving route and state acquisition route；It is described defeated
Driver circuit accesses level microcontroller signal out, and output phase should act on the level signal of water pump；The state acquisition route connects
Enter the level signal, exports corresponding state acquisition signal.
2. a kind of inexpensive water pump control circuit as described in claim 1, it is characterised in that: the output driving route is equipped with
First resistor (R1), second resistance (R2), 3rd resistor (R3), the first triode (Q1) and first capacitor (C1), described first
The level microcontroller signal is accessed in one end of resistance (R1), the other end connect the base stage (B) of first triode (Q1) with
One end of the second resistance (R2), the other end ground connection of the second resistance (R2), the collector (C) of first triode
One end of the first capacitor (C1) is connected as drive output, the emitter (E) of first triode (Q1) connects institute
State the one end 3rd resistor (R3), the other end ground connection of the 3rd resistor (R3) and the first capacitor (C1).
3. a kind of inexpensive water pump control circuit as claimed in claim 2, it is characterised in that: the state acquisition route is equipped with
4th resistance (R4), the 5th resistance (R5), voltage-stabiliser tube (D), the second capacitor C2；4th resistance (R4) and the 5th resistance (R5)
It is sequentially connected in series between the collector (C) and ground of first triode (Q1), voltage-stabiliser tube (D) differential concatenation is described
The both ends of five resistance (R5), second capacitor (C2) is connected in parallel between the negative pole end and positive terminal of the voltage-stabiliser tube (D), described
The common connection end of 4th resistance (R4) and the 5th resistance (R5) exports the state acquisition signal as acquisition output end.
4. a kind of inexpensive water pump control circuit as claimed in claim 3, it is characterised in that: the acquisition output end and described
Drive output is respectively connected to the driving input terminal and signal acquisition terminal of water pump internal wiring.
5. a kind of inexpensive water pump control circuit as claimed in claim 4, it is characterised in that: the water pump internal wiring is equipped with
Second triode (Q2), the 6th resistance (R6), MCU, the 7th resistance (R7) and the 8th resistance (R8)；Second triode (Q2)
Collector (C) be the water pump internal wiring driving input terminal, emitter (E) ground connection, base stage (B) connection the described 8th
Resistance (R8) connects the driving end of the MCU afterwards；Power supply (VCC) passes through the 6th resistance (R6) connection the described 2nd 3
The collector (C) of pole pipe (Q2), the collector (C) of second triode (Q2) also connect institute by the 7th resistance (R7)
State the power input of MCU.
6. a kind of inexpensive water pump control circuit as claimed in claim 5, it is characterised in that: the state acquisition signal is
The level signal of second triode (Q2), the MCU belonging to the signal acquisition terminal.
7. a kind of inexpensive water pump control circuit as claimed in claim 6, it is characterised in that: the MCU passes through described in analysis
The drop-down level time of level signal determines the working condition of water pump；The working condition includes dry turn, stall, excess temperature, is lower than
Lowest speed and normal work.
8. a kind of inexpensive water pump control circuit as claimed in claim 6, it is characterised in that: the MCU passes through described in analysis
The size of the collection voltages of level signal diagnoses the abnormality of the inexpensive water pump control circuit；The abnormality includes
To power supply short circuit, shorted to earth or open circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821066186.0U CN208651111U (en) | 2018-07-05 | 2018-07-05 | A kind of low cost water pump control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821066186.0U CN208651111U (en) | 2018-07-05 | 2018-07-05 | A kind of low cost water pump control circuit |
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| Publication Number | Publication Date |
|---|---|
| CN208651111U true CN208651111U (en) | 2019-03-26 |
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ID=65783650
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821066186.0U Active CN208651111U (en) | 2018-07-05 | 2018-07-05 | A kind of low cost water pump control circuit |
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| CN (1) | CN208651111U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114228731A (en) * | 2021-11-30 | 2022-03-25 | 江铃汽车股份有限公司 | Water pump fault diagnosis method and system, storage medium and electric automobile |
-
2018
- 2018-07-05 CN CN201821066186.0U patent/CN208651111U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114228731A (en) * | 2021-11-30 | 2022-03-25 | 江铃汽车股份有限公司 | Water pump fault diagnosis method and system, storage medium and electric automobile |
| CN114228731B (en) * | 2021-11-30 | 2024-02-02 | 江铃汽车股份有限公司 | Water pump fault diagnosis method, system, storage medium and electric automobile |
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