CN207315714U - A kind of cooling fan control circuit of electric automobile - Google Patents
A kind of cooling fan control circuit of electric automobile Download PDFInfo
- Publication number
- CN207315714U CN207315714U CN201721278122.2U CN201721278122U CN207315714U CN 207315714 U CN207315714 U CN 207315714U CN 201721278122 U CN201721278122 U CN 201721278122U CN 207315714 U CN207315714 U CN 207315714U
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- CN
- China
- Prior art keywords
- output terminal
- cooling fan
- car controller
- entire car
- input terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model provides a kind of cooling fan control circuit of electric automobile, including：DC-DC converter, entire car controller, relay, filter unit, Overvoltage protecting unit and voltage regulation unit.The input terminal of the filter unit is connected with the output terminal of the DC-DC converter, and the output terminal of the filter unit is connected with the input terminal of the Overvoltage protecting unit.The control terminal of the relay is connected with the output terminal of the entire car controller; the input terminal of the relay is connected with the output terminal of the Overvoltage protecting unit; the output terminal of the relay is connected with the input terminal of the voltage regulation unit, and the output terminal of the voltage regulation unit is connected with the input end of motor of cooling fan.When the output terminal of the entire car controller is high level, the low-voltage dc power supply of the DC-DC converter output powers the motor of cooling fan, the motor operating of the cooling fan.The utility model can improve the security that electric automobile uses.
Description
Technical field
It the utility model is related to technical field of automotive electronics, more particularly to a kind of vehicle-mounted fan control circuitry.
Background technology
With the consumption of the oil gas energy, the development of electric automobile is increasingly taken seriously, existing driving motor for electric automobile
The type of cooling have two kinds of forms, one kind is from air cooling way, and the cooling fan of this air cooling way is installed on driving motor
In shaft, rotate and rotate with driving rotor.Another kind is external air cooling system mode, and the cooling fan of this mode is generally by car
Upper 24V or the power supply of 12V DC low-tension supply, overcome that cooling effect is bad when driving motor low speed asks from air cooling way
Topic.But this external air cooling system mode to the more demanding of power supply, and drives motor output that certain wide spectrum arteries and veins is presented cooling fan
Dynamic characteristic causes output voltage to be likely to occur some peak voltages, may damage vehicle-mounted fan at this time, meanwhile, it is other on vehicle
Electrical equipment can be by circuit Conducted Electromagnetic Interference, and electromagnetic interference when commutating such as rain shaving electrical machine, can influence cooling fan just
Often work and service life.Therefore, how to ensure that the power supply of cooling fan is of great significance.
Utility model content
The utility model provides a kind of cooling fan control circuit of electric automobile, solves the cooling wind of existing electric automobile
Power supply instability is fanned, the problem of easily interference by other electrical equipments, the service life of cooling fan can be improved, improve electric automobile
The security used.
In order to achieve the above object, the utility model provides following technical scheme：
A kind of cooling fan control circuit of electric automobile, including：DC-DC converter, entire car controller, relay, filtering
Unit, Overvoltage protecting unit and voltage regulation unit；
The input terminal of the filter unit is connected with the output terminal of the DC-DC converter, the output terminal of the filter unit
It is connected with the input terminal of the Overvoltage protecting unit；
The control terminal of the relay is connected with the output terminal of the entire car controller, the input terminal of the relay and institute
The output terminal for stating Overvoltage protecting unit is connected, and the output terminal of the relay is connected with the input terminal of the voltage regulation unit, described
The output terminal of voltage regulation unit is connected with the input end of motor of cooling fan；
When the output terminal of the entire car controller is high level, the low-voltage direct of DC-DC converter output supplies electricity to cold
But the motor power supply of fan, the motor operating of the cooling fan.
Preferably, the filter unit includes：First diode, varistor, Transient Suppression Diode and the first capacitance；
Input terminal of the anode of first diode as the filter unit, the cathode difference of first diode
The cathode of one end, the Transient Suppression Diode with the varistor and one end of first capacitance are connected, the pressure
The other end of the other end of quick resistance, the anode of the Transient Suppression Diode and first capacitance with body earth phase
Even, output terminal of the one end of first capacitance as the filter unit.
Preferably, the Overvoltage protecting unit includes：First resistor, second resistance, pressure limiting chip and metal-oxide-semiconductor；
Input terminal of the drain electrode of the metal-oxide-semiconductor as the Overvoltage protecting unit, the source electrode of the metal-oxide-semiconductor is as the mistake
Press the output terminal of protection location；
One end of the first resistor is connected with the drain electrode of the metal-oxide-semiconductor, the other end of the first resistor and described the
One end of two resistance is connected, and the other end of the second resistance is connected with body earth；
For the first input end of the pressure limiting chip with the drain electrode of the metal-oxide-semiconductor with being connected, the second of the pressure limiting chip is defeated
Entering end with one end of the second resistance with being connected, the first output terminal of the pressure limiting chip is connected with the grid of the metal-oxide-semiconductor,
Second output terminal of the pressure limiting chip is connected with the source electrode of the metal-oxide-semiconductor；
When the voltage of the pressure limiting chip input terminal is more than setting voltage threshold, MOS described in the pressure limiting chip controls
Pipe disconnects.
Preferably, the voltage regulation unit includes：Voltage stabilizing chip, 3rd resistor and the 4th resistance；
Input terminal of the input terminal of the voltage stabilizing chip as the voltage regulation unit, one end of the 3rd resistor and vehicle body
Bonding is connected, the other end of the 3rd resistor respectively with the output terminal of the voltage stabilizing chip and one end phase of the 4th resistance
Even, output terminal of the other end of the 4th resistance as the voltage regulation unit；
The voltage stabilizing chip carries out decompression change according to the ratio of the 3rd resistor and the 4th resistance to input voltage
Change, to reach the voltage request of cooling fan.
Preferably, further include：Manual switch；
The manual switch is serially connected between the first input end and body earth of the entire car controller, described manual
During switch closure, the output terminal of the entire car controller is high level.
Preferably, further include：Current sensor；
The output terminal of the current sensor is connected with the second input terminal of the entire car controller, the current sensor
For detecting the operating current of the cooling fan；
It is zero in the operating current, and when the output terminal of the entire car controller is high level, the entire car controller
Send power failure warning message.
Preferably, further include：Temperature sensor；
The output terminal of the temperature sensor is connected with the 3rd input terminal of the entire car controller, the temperature sensor
For detecting the driving motor temperature of electric automobile；
It is more than design temperature threshold value in the driving motor temperature, and the output terminal of the entire car controller is high level
When, the entire car controller sends temperature alarming message.
Preferably, further include：Combination instrument；
The combination instrument is connected by CAN bus with the entire car controller, is received in the combination instrument described
After power failure warning message or the temperature alarming message, the combination instrument is shown and/or voice broadcast warning message.
The utility model provides a kind of cooling fan control circuit of electric automobile, passes through the supply input to cooling fan
It is filtered, overvoltage protection and voltage stabilizing control, the cooling fan power supply instability of existing electric automobile is solved, easily by other electricity consumptions
The problem of equipment is disturbed, can improve the service life of cooling fan, improve the security that electric automobile uses.
Brief description of the drawings
, below will be to needed in the embodiment attached in order to illustrate more clearly of specific embodiment of the utility model
Figure is briefly described.
Fig. 1：It is a kind of cooling fan control circuit schematic diagram of electric automobile provided by the utility model；
Fig. 2：It is the cooling fan control circuit schematic diagram that the utility model embodiment provides.
Reference numeral
K1 manual switches
J1 relays
Q1 metal-oxide-semiconductors
B storage batteries
R1 first resistors
R2 second resistances
R3 3rd resistors
The 4th resistance of R4
RZ varistors
The first capacitances of C1
The first diodes of D1
D2 Transient Suppression Diodes
Embodiment
In order to make those skilled in the art more fully understand the scheme of the utility model embodiment, below in conjunction with the accompanying drawings and
Embodiment is described in further detail the utility model embodiment.
For the heat dissipation of current driving motor for electric automobile, with the cooling fan type of cooling, often occur power supply instability,
The problem of being easily disturbed.The utility model provides a kind of cooling fan control circuit of electric automobile, solves the above problems, can change
The service life of kind cooling fan, improves the security that electric automobile uses.
As shown in Figure 1, a kind of cooling fan control circuit of electric automobile, including：DC-DC converter, entire car controller,
Relay J1, filter unit, Overvoltage protecting unit and voltage regulation unit.The input terminal of the filter unit and the DC-DC converter
Output terminal be connected, the output terminal of the filter unit is connected with the input terminal of the Overvoltage protecting unit.The relay J1
Control terminal be connected with the output terminal of the entire car controller, the input terminal of the relay J1 and the Overvoltage protecting unit
Output terminal is connected, and the output terminal of the relay J1 is connected with the input terminal of the voltage regulation unit, the output of the voltage regulation unit
End is connected with the input end of motor of cooling fan.When the output terminal of the entire car controller is high level, the DCDC conversions
The low-voltage direct of device output supplies electricity to the motor power supply of cooling fan, the motor operating of the cooling fan.
As shown in Fig. 2, the filter unit includes：First diode D1, varistor RZ, Transient Suppression Diode D2 and
First capacitance C1.Input terminal of the anode of the first diode D1 as the filter unit, the first diode D1's
Cathode respectively one end with the varistor RZ, the cathode of the Transient Suppression Diode D2 and the first capacitance C1 one
End is connected, the other end of the varistor RZ, the anode of the Transient Suppression Diode D2 and the first capacitance C1 it is another
One end is connected with body earth, the output terminal of one end of the first capacitance C1 as the filter unit.Need what is illustrated
It is that the power supply of entire car controller is provided by storage battery B.
As shown in Fig. 2, the Overvoltage protecting unit includes：First resistor R1, second resistance R2, pressure limiting chip and metal-oxide-semiconductor
Q1.Input terminal of the drain electrode of the metal-oxide-semiconductor Q1 as the Overvoltage protecting unit, the source electrode of the metal-oxide-semiconductor Q1 is as the mistake
Press the output terminal of protection location.One end of the first resistor R1 is connected with the drain electrode of the metal-oxide-semiconductor Q1, the first resistor R1
The other end be connected with one end of the second resistance R2, the other end of the second resistance R2 is connected with body earth.It is described
The first input end of pressure limiting chip with the drain electrode of the metal-oxide-semiconductor Q1 with being connected, the second input terminal of the pressure limiting chip with it is described
One end of second resistance R2 is with being connected, and the first output terminal of the pressure limiting chip is connected with the grid of the metal-oxide-semiconductor Q1, the limit
Second output terminal of pressure chip is connected with the source electrode of the metal-oxide-semiconductor Q1.It is more than setting in the voltage of the pressure limiting chip input terminal
During voltage threshold, metal-oxide-semiconductor Q1 described in the pressure limiting chip controls is disconnected.
In practical applications, pressure limiting chip can use MAX6495 models, by setting first resistor R1, second resistance R2
Size come set protection voltage threshold value, e.g., when the OVERSET pins receiving voltage of MAX6495 is more than 1.24V, GATE draws
Foot exports low level.Metal-oxide-semiconductor Q1 (can use L2910 models) is disconnected at this time, makes the confession of cooling fan electrically disconnected.Work as OVERSET
GATE feet export high level when pin is less than 1.18V, and metal-oxide-semiconductor Q1 is closed at this time, conducts the confession of cooling fan.
As shown in Fig. 2, the voltage regulation unit includes：Voltage stabilizing chip, 3rd resistor R3 and the 4th resistance R4.The voltage stabilizing core
Input terminal of the input terminal of piece as the voltage regulation unit, one end of the 3rd resistor R3 are connected with body earth, and described
The other end of three resistance R3 is connected with the output terminal of the voltage stabilizing chip and one end of the 4th resistance R4 respectively, and the described 4th
Output terminal of the other end of resistance R4 as the voltage regulation unit.The voltage stabilizing chip is according to the 3rd resistor R3 and described the
The ratio of four resistance R4 carries out decompression transformation to input voltage, to reach the voltage request of cooling fan.
In practical applications, voltage stabilizing chip can use MC34063 models, by 3rd resistor R3's and the 4th resistance R4
Ratio is set, and cooling fan obtains stable control source, so that 6 stitch obtain electric, U1 live line works in MC34063.Its
The output voltage size of middle voltage stabilizing chip is：(1+R3/R4)×1.25.
Further, which further includes：Manual switch K1, the manual switch K1 are serially connected in the of the entire car controller
Between one input terminal and body earth, when the manual switch K1 is closed, the output terminal of the entire car controller is high level.
The circuit further includes：Current sensor, the output terminal of the current sensor and the second of the entire car controller
Input terminal is connected, and the current sensor is used for the operating current for detecting the cooling fan.It is zero in the operating current, and
When the output terminal of the entire car controller is high level, the entire car controller sends power failure warning message.
The circuit further includes：Temperature sensor, the output terminal of the temperature sensor and the 3rd of the entire car controller
Input terminal is connected, and the temperature sensor is used for the driving motor temperature for detecting electric automobile.It is big in the driving motor temperature
In design temperature threshold value, and when the output terminal of the entire car controller is high level, the entire car controller sends temperature alarming
Message.
Further, which further includes：Combination instrument, the combination instrument pass through CAN bus and the entire car controller
It is connected, after the combination instrument receives the power failure warning message or the temperature alarming message, the combination instrument
Table is shown and/or voice broadcast warning message.
As it can be seen that the utility model provides a kind of cooling fan control circuit of electric automobile, pass through the confession to cooling fan
Electricity input is filtered, overvoltage protection and voltage stabilizing control, solves the cooling fan power supply instability of existing electric automobile, Yi Shouqi
The problem of its electrical equipment is disturbed, can improve the service life of cooling fan, improve the security that electric automobile uses.
The structure, feature and effect of the utility model are described in detail according to diagrammatically shown embodiment above, with
Upper described is only the preferred embodiment of the utility model, but the utility model is to limit practical range shown in drawing, it is every according to
The change that conception according to the utility model is made, or the equivalent embodiment of equivalent variations is revised as, still without departing from specification and figure
When showing covered spirit, it should be within the protection scope of the present utility model.
Claims (8)
- A kind of 1. cooling fan control circuit of electric automobile, it is characterised in that including：DC-DC converter, entire car controller, after Electric appliance, filter unit, Overvoltage protecting unit and voltage regulation unit；The input terminal of the filter unit is connected with the output terminal of the DC-DC converter, the output terminal of the filter unit and institute The input terminal for stating Overvoltage protecting unit is connected；The control terminal of the relay is connected with the output terminal of the entire car controller, the input terminal of the relay and the mistake The output terminal of pressure protection location is connected, and the output terminal of the relay is connected with the input terminal of the voltage regulation unit, the voltage stabilizing The output terminal of unit is connected with the input end of motor of cooling fan；When the output terminal of the entire car controller is high level, the low-voltage direct of the DC-DC converter output supplies electricity to cooling wind The motor power supply of fan, the motor operating of the cooling fan.
- 2. the cooling fan control circuit of electric automobile according to claim 1, it is characterised in that the filter unit bag Include：First diode, varistor, Transient Suppression Diode and the first capacitance；Input terminal of the anode of first diode as the filter unit, the cathode of first diode respectively with institute State one end of varistor, the cathode of the Transient Suppression Diode is connected with one end of first capacitance, the pressure-sensitive electricity The other end of the other end of resistance, the anode of the Transient Suppression Diode and first capacitance is connected with body earth, institute State output terminal of the one end of the first capacitance as the filter unit.
- 3. the cooling fan control circuit of electric automobile according to claim 2, it is characterised in that the overvoltage protection list Member includes：First resistor, second resistance, pressure limiting chip and metal-oxide-semiconductor；Input terminal of the drain electrode of the metal-oxide-semiconductor as the Overvoltage protecting unit, the source electrode of the metal-oxide-semiconductor are protected as the overvoltage Protect the output terminal of unit；One end of the first resistor is connected with the drain electrode of the metal-oxide-semiconductor, the other end of the first resistor and the described second electricity One end of resistance is connected, and the other end of the second resistance is connected with body earth；The first input end of the pressure limiting chip is with the drain electrode of the metal-oxide-semiconductor with being connected, the second input terminal of the pressure limiting chip With being connected, the first output terminal of the pressure limiting chip is connected with the grid of the metal-oxide-semiconductor, described for one end with the second resistance Second output terminal of pressure limiting chip is connected with the source electrode of the metal-oxide-semiconductor；When the voltage of the pressure limiting chip input terminal is more than setting voltage threshold, metal-oxide-semiconductor described in the pressure limiting chip controls breaks Open connection.
- 4. the cooling fan control circuit of electric automobile according to claim 3, it is characterised in that the voltage regulation unit bag Include：Voltage stabilizing chip, 3rd resistor and the 4th resistance；Input terminal of the input terminal of the voltage stabilizing chip as the voltage regulation unit, one end of the 3rd resistor and body earth It is connected, the other end of the 3rd resistor is connected with the output terminal of the voltage stabilizing chip and one end of the 4th resistance respectively, Output terminal of the other end of 4th resistance as the voltage regulation unit；The voltage stabilizing chip carries out decompression transformation according to the ratio of the 3rd resistor and the 4th resistance to input voltage, with Reach the voltage request of cooling fan.
- 5. the cooling fan control circuit of electric automobile according to claim 4, it is characterised in that further include：Open manually Close；The manual switch is serially connected between the first input end and body earth of the entire car controller, in the manual switch During closure, the output terminal of the entire car controller is high level.
- 6. the cooling fan control circuit of electric automobile according to claim 5, it is characterised in that further include：Electric current passes Sensor；The output terminal of the current sensor is connected with the second input terminal of the entire car controller, and the current sensor is used for Detect the operating current of the cooling fan；It is zero in the operating current, and when the output terminal of the entire car controller is high level, the entire car controller is sent Power failure warning message.
- 7. the cooling fan control circuit of electric automobile according to claim 6, it is characterised in that further include：Temperature passes Sensor；The output terminal of the temperature sensor is connected with the 3rd input terminal of the entire car controller, and the temperature sensor is used for Detect the driving motor temperature of electric automobile；It is more than design temperature threshold value in the driving motor temperature, and when the output terminal of the entire car controller is high level, institute State entire car controller and send temperature alarming message.
- 8. the cooling fan control circuit of electric automobile according to claim 7, it is characterised in that further include：Combine instrument Table；The combination instrument is connected by CAN bus with the entire car controller, and the power supply is received in the combination instrument After fault alarm message or the temperature alarming message, the combination instrument is shown and/or voice broadcast warning message.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721278122.2U CN207315714U (en) | 2017-09-30 | 2017-09-30 | A kind of cooling fan control circuit of electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721278122.2U CN207315714U (en) | 2017-09-30 | 2017-09-30 | A kind of cooling fan control circuit of electric automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207315714U true CN207315714U (en) | 2018-05-04 |
Family
ID=62429130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721278122.2U Expired - Fee Related CN207315714U (en) | 2017-09-30 | 2017-09-30 | A kind of cooling fan control circuit of electric automobile |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207315714U (en) |
-
2017
- 2017-09-30 CN CN201721278122.2U patent/CN207315714U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180504 Termination date: 20200930 |