CN208585047U - Drive circuit, on-vehicle air conditioning system and vehicle - Google Patents
Drive circuit, on-vehicle air conditioning system and vehicle Download PDFInfo
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- CN208585047U CN208585047U CN201820732376.5U CN201820732376U CN208585047U CN 208585047 U CN208585047 U CN 208585047U CN 201820732376 U CN201820732376 U CN 201820732376U CN 208585047 U CN208585047 U CN 208585047U
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- 238000004378 air conditioning Methods 0.000 title abstract 2
- 230000003321 amplification Effects 0.000 claims abstract description 29
- 238000003199 nucleic acid amplification method Methods 0.000 claims abstract description 29
- 239000004065 semiconductor Substances 0.000 claims description 10
- 230000005611 electricity Effects 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 abstract 1
- 206010037660 Pyrexia Diseases 0.000 description 8
- 238000010586 diagram Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The utility model discloses a drive circuit, on-vehicle air conditioning system and vehicle, wherein, drive circuit includes: the first input end of the comparison unit is connected with the signal input end to obtain an input signal, and the second input end of the comparison unit is connected with the reference voltage providing end to obtain a reference voltage signal, so that the comparison unit compares the input signal with the reference voltage signal and outputs a comparison signal; the first end of the power amplification unit is connected with the output end of the comparison unit, and the second end of the power amplification unit is connected with a first preset power supply and used for amplifying the comparison signal and outputting an amplified signal from the fourth end; and the control end of the switch unit is connected with the fourth end of the power amplification unit, the first end of the switch unit is connected with the negative power supply end of the load, and the switch unit is switched on/off under the driving of the amplified signal so as to drive the load. Therefore, the circuit amplifies the input signal and then inputs the amplified signal to the switch unit, so that the switching speed of the switch unit can be increased, the switching loss and the heating are reduced, and the switching efficiency is improved.
Description
Technical field
The utility model relates to automobile technical field, in particular to a kind of driving circuit, a kind of mounted air conditioner system and one
Kind vehicle.
Background technique
Currently, the load on vehicle, such as the blower of mounted air conditioner system, it is general to be input to driving circuit by changing
The duty ratio of PWM (Pulse Width Modulation, pulse width modulation) signal realizes revolving speed control.
Specifically, as shown in Figure 1, IO2 output pwm signal, controls the on/off of the first triode E1, E1 control second
The on/off of triode E2.The output of E2 controls the switch of metal-oxide-semiconductor E3 by first resistor R1, second resistance R2.Pass through adjusting
The duty ratio of pwm signal to control the voltage at the both ends blower M, and then achievees the purpose that control blower M wind speed.Opening metal-oxide-semiconductor
It when E3, is driven by R1, when closing metal-oxide-semiconductor E3, is driven by R2.
In the related technology, R1, R2 are generally generally chosen larger resistance value by considering based on cost, so that metal-oxide-semiconductor E3 be made to drive
Streaming current is smaller, causes the switching speed of metal-oxide-semiconductor E3 slower, and switching loss is larger, and switch efficiency is low.
Utility model content
The utility model is intended to solve one of the technical problem in above-mentioned technology at least to a certain extent.For this purpose, this reality
It is to propose a kind of driving circuit with first novel purpose, which is input to switch again after amplifying input signal single
Member reduces switching loss and fever so as to improve the switching speed of switch unit, improves switch efficiency.
Second purpose of the utility model is to propose a kind of mounted air conditioner system.
The third purpose of the utility model is to propose a kind of vehicle.
In order to achieve the above objectives, the utility model first aspect proposes a kind of driving circuit, comprising: comparing unit, institute
It states the first input end of comparing unit and signal input part is connected to obtain input signal, the second input terminal of the comparing unit
It provides end with reference voltage to be connected to obtain reference voltage signal, the comparing unit is to by the input signal and the base
Quasi- voltage signal is compared and exports comparison signal；Power amplification unit, the first end of the power amplification unit with it is described
The output end of comparing unit is connected, and the second end of the power amplification unit is connected with the first default power supply, the power amplification
The third end of unit is grounded, and the power amplification unit is to amplify processing for the comparison signal and export from the 4th end
Amplified signal；Switch unit, the control terminal of the switch unit are connected with the 4th end of the power amplification unit, the switch
The first end of unit is connected with the negative sense power end of load, the positive power end of the load and the described first default power supply phase
Even, the second end ground connection of the switch unit, switch unit disconnection/conducting under the driving of the amplified signal, to drive
Move the load.
Input signal and reference voltage signal are compared by driving circuit according to the present utility model by comparing unit
And comparison signal is exported, comparison signal is amplified processing and exports amplified signal, switch from the 4th end by power amplification unit
Unit disconnection/conducting under the driving of amplified signal, to drive load.The circuit inputs again after amplifying input signal as a result,
Switching loss and fever are reduced so as to improve the switching speed of switch unit to switch unit, improves switch efficiency.
In addition, can also have the following additional technical features: according to the utility model driving circuit set forth above
Specifically, the comparing unit includes: comparator, the positive input of the comparator and the signal input part
It is connected；First resistor, one end of the first resistor are connected with the second default power supply；Second resistance, the one of the second resistance
End is connected with the other end of the first resistor, and the other end of the second resistance is grounded, and one end of the second resistance and
Between the other end of the first resistor have first node, the first node as the reference voltage provide end with it is described
The inverting input terminal of comparator is connected.
Specifically, the power amplification unit includes: first switch tube, the first end of the first switch tube and described the
One default power supply is connected；3rd resistor, one end of the 3rd resistor are connected with the second end of the first switch tube；4th electricity
Resistance, one end of the 4th resistance is connected with the other end of the 3rd resistor, and one end of the 4th resistance and described the
There is second node, fourth end of the second node as the power amplification unit between the other end of three resistance；Second
Switching tube, the first end ground connection of the second switch, the second end of the second switch are another with the 4th resistance
End be connected, the control terminal of the second switch be connected with the control terminal of the first switch tube afterwards and the comparator output
End is connected.
Further, the first switch tube is NPN type triode, and the second switch is PNP type triode.
Specifically, the switch unit includes third switching tube.
Specifically, the third switching tube is MOS (Metal-Oxide-Semiconductor, metal-oxide-half
Conductor) pipe.
Specifically, the input signal is pwm signal.
In order to achieve the above objectives, the utility model second aspect proposes a kind of mounted air conditioner system comprising this is practical
Driving circuit described in novel first aspect embodiment.
Mounted air conditioner system according to the present utility model, by above-mentioned driving circuit, by changing accounting for for input signal
Revolving speed control of the sky than mounted air conditioner system blower may be implemented, is input to switch unit again after input signal is amplified, can be with
The switching speed of switch unit is improved, switching loss and fever are reduced, improves switch efficiency.
In order to achieve the above objectives, the utility model third aspect proposes a kind of vehicle comprising the utility model second
Mounted air conditioner system described in aspect.
The vehicle of the utility model, by above-mentioned mounted air conditioner system, the duty ratio by changing input signal can be with
The revolving speed control for realizing mounted air conditioner system blower, is input to switch unit again, switch can be improved after input signal is amplified
The switching speed of unit reduces switching loss and fever, improves switch efficiency.
Detailed description of the invention
The utility model is above-mentioned and/or additional aspect and advantage from the following description of the accompanying drawings of embodiments will
Become obvious and be readily appreciated that, wherein
Fig. 1 is the schematic diagram of driving circuit in the related technology；
Fig. 2 is the block diagram according to the driving circuit of the utility model one embodiment；
Fig. 3 is the circuit topology figure according to the driving circuit of the utility model one embodiment.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, it is intended to for explaining the utility model, and should not be understood as to the utility model
Limitation.
The driving circuit, mounted air conditioner system and vehicle of the utility model embodiment described with reference to the accompanying drawing.
Fig. 2 is the block diagram according to the driving circuit of the utility model one embodiment.The circuit packet as shown in Figure 2
It includes: comparing unit 10, power amplification unit 20, switch unit 30.
Wherein, the first input end of comparing unit 10 is connected to obtain input signal, comparing unit with signal input part IO2
10 the second input terminal provides end Vref with reference voltage and is connected to obtain reference voltage signal, and comparing unit 10 will be will input
Signal and reference voltage signal are compared and export comparison signal.The first end of power amplification unit 20 and comparing unit 10
Output end is connected, and the second end of power amplification unit 20 is connected with the first default power supply VB, the third end of power amplification unit 20
Ground connection, power amplification unit 20 comparison signal is amplified processing and export amplified signal from the 4th end.Switch unit
30 control terminal is connected with the 4th end of power amplification unit 20, the first end of switch unit 30 and the negative sense power end of load RL
It is connected, the positive power end of load is connected with the first default power supply VB, and the second end ground connection of switch unit 30, switch unit 30 exists
Disconnection/conducting under the driving of amplified signal, to drive load.
In the embodiments of the present invention, input signal can be pwm signal.
Specifically, input signal can be compared with reference voltage signal and be exported comparison signal by comparing unit 10,
Wherein, when input signal is greater than reference voltage signal, comparison signal is high level signal, when input signal is less than reference voltage
When signal, comparison signal is low level signal, and reference voltage signal can be preset according to the actual situation.Power amplification unit
20 can amplify comparison signal processing, and generate the control terminal that amplified signal is input to switch unit 30, driving switch
Disconnection/conducting of unit 30, to drive load RL.Wherein, if load RL is the blower of mounted air conditioner system, pass through adjusting
The duty of pwm signal is the revolving speed of adjustable blower.Since the available driving current of amplified signal is larger, the driving
The switching speed of switch unit can be improved in circuit, reduces switching loss and fever, energy saving, improves switch efficiency.
The specific topology of the driving circuit of the utility model embodiment is described below with reference to specific example.
One embodiment according to the present utility model, as shown in figure 3, comparing unit 10 may include: comparator A1, first
Resistance R1, second resistance R2.
Wherein, the positive input of comparator A1 and signal input part IO2 phase.One end of first resistor R1 is default with second
Power vd D is connected.One end of second resistance R2 is connected with the other end of first resistor R1, the other end ground connection of second resistance R2,
And there is first node 1 between one end of second resistance R2 and the other end of first resistor R1, first node 1 is used as reference voltage
End Vref is provided to be connected with the inverting input terminal of comparator A1.
Specifically, VDD is constant voltage, so the inverting input terminal of comparator A1 is constant voltageVref can be designed to the 1/2 of the high level voltage of the pwm signal of IO2 output.Work as input signal
When greater than Vref, comparator A1 exports high level signal；When input signal is less than Vref, comparator A1 exports low level letter
Number.
One embodiment according to the present utility model, as shown in figure 3, power amplification unit 20 may include: first switch
Pipe Q1,3rd resistor R3, the 4th resistance R4, second switch Q2.
Wherein, the first end of first switch tube Q1 is connected with the first default power supply VB.One end of 3rd resistor R3 and first
The second end of switching tube Q1 is connected.One end of 4th resistance R4 is connected with the other end of 3rd resistor R3, and the 4th resistance R4
Between one end and the other end of 3rd resistor R3 have second node 2, second node 2 as power amplification unit 20 the 4th
End.The first end of second switch Q2 is grounded, and the second end of second switch Q2 is connected with the other end of the 4th resistance R4, and second
The control terminal of switching tube Q2 is connected after being connected with the control terminal of first switch tube Q1 with the output end of comparator A1.
Wherein, in the embodiments of the present invention, first switch tube Q1 can be NPN type triode, second switch
Q2 can be PNP type triode.
As shown in figure 3, switch unit 30 may include third switching tube Q3.Third switching tube Q3 can be metal-oxide-semiconductor.
Specifically, when IO2 exports high level, A1 exports high level signal, and Q1 is opened, and Q2 is closed, and Q3 is opened；In I/O port
When exporting low level, A1 exports low level signal, and Q1 is closed, and Q2 is opened, and Q3 is closed.In the utility model, Q1, Q2 are designed as penetrating
Pole follower, forms power amplifier, and emitter-base bandgap grading output voltage is approximately equal to base stage input voltage.R3, R4 are current-limiting resistance, generally
Value is smaller, so driving current is very big, therefore in metal-oxide-semiconductor Q3 switch, gate drive current is very big, and metal-oxide-semiconductor Q3 is opened
Pass speed is very fast, and switching power loss is very low, improves switch efficiency and saves the energy.
Input signal and reference voltage signal are compared by driving circuit according to the present utility model by comparing unit
And comparison signal is exported, comparison signal is amplified processing and exports amplified signal, switch from the 4th end by power amplification unit
Unit disconnection/conducting under the driving of amplified signal, to drive load.The circuit inputs again after amplifying input signal as a result,
Switching loss and fever are reduced so as to improve the switching speed of switch unit to switch unit, improves switch efficiency.
In addition, the utility model also proposes a kind of mounted air conditioner system comprising above-mentioned driving circuit.
Mounted air conditioner system according to the present utility model, by above-mentioned driving circuit, by changing accounting for for input signal
Revolving speed control of the sky than mounted air conditioner system blower may be implemented, is input to switch unit again after input signal is amplified, can be with
The switching speed of switch unit is improved, switching loss and fever are reduced, improves switch efficiency.
This utility model also proposed a kind of vehicle comprising above-mentioned mounted air conditioner system.
The vehicle of the utility model, by above-mentioned mounted air conditioner system, the duty ratio by changing input signal can be with
The revolving speed control for realizing mounted air conditioner system blower, is input to switch unit again, switch can be improved after input signal is amplified
The switching speed of unit reduces switching loss and fever, improves switch efficiency.
In the description of the present invention, it should be understood that term " center ", " longitudinal direction ", " transverse direction ", " length ", " width
Degree ", " thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside",
The orientation or positional relationship of the instructions such as " clockwise ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " is based on the figure
Orientation or positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the dress of indication or suggestion meaning
It sets or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as to the utility model
Limitation.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.The meaning of " plurality " is two or two in the description of the present invention,
More than, unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " Gu
It is fixed " etc. terms shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be
Mechanical connection, is also possible to be electrically connected；It can be directly connected, two can also be can be indirectly connected through an intermediary
The interaction relationship of connection or two elements inside element.It for the ordinary skill in the art, can basis
Concrete condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature is in the second feature " on " or " down "
It can be that the first and second features directly contact or the first and second features are by intermediary mediate contact.Moreover, first is special
Sign can be fisrt feature above the second feature " above ", " above " and " above " and be directly above or diagonally above the second feature, or only
Indicate that first feature horizontal height is higher than second feature.Fisrt feature under the second feature " below ", " below " and " below " can be with
It is that fisrt feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
It states and is necessarily directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be with
It can be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this field
Technical staff can by the feature of different embodiments or examples described in this specification and different embodiments or examples into
Row combination and combination.
Although the embodiments of the present invention have been shown and described above, it is to be understood that above-described embodiment is
Illustratively, it should not be understood as limiting the present invention, those skilled in the art are in the scope of the utility model
Inside it can make changes, modifications, alterations, and variations to the above described embodiments.
Claims (9)
1. a kind of driving circuit characterized by comprising
Comparing unit, the first input end of the comparing unit are connected to obtain input signal, the comparison with signal input part
Second input terminal of unit and reference voltage provide end and are connected to obtain reference voltage signal, the comparing unit to will described in
Input signal and the reference voltage signal are compared and export comparison signal；
Power amplification unit, the first end of the power amplification unit are connected with the output end of the comparing unit, the power
The second end of amplifying unit is connected with the first default power supply, the third end ground connection of the power amplification unit, the power amplification
Unit the comparison signal is amplified processing and exports amplified signal from the 4th end；
Switch unit, the control terminal of the switch unit are connected with the 4th end of the power amplification unit, the switch unit
First end be connected with the negative sense power end of load, the positive power end of the load is connected with the described first default power supply, institute
State the second end ground connection of switch unit, switch unit disconnection/conducting under the driving of the amplified signal, described in driving
Load.
2. driving circuit as described in claim 1, which is characterized in that the comparing unit includes:
Comparator, the positive input of the comparator are connected with the signal input part；
First resistor, one end of the first resistor are connected with the second default power supply；
Second resistance, one end of the second resistance are connected with the other end of the first resistor, the second resistance it is another
End ground connection, and there is first node, the first segment between one end of the second resistance and the other end of the first resistor
Point provides end as the reference voltage and is connected with the inverting input terminal of the comparator.
3. driving circuit as claimed in claim 2, which is characterized in that the power amplification unit includes:
First switch tube, the first end of the first switch tube are connected with the described first default power supply；
3rd resistor, one end of the 3rd resistor are connected with the second end of the first switch tube；
One end of 4th resistance, the 4th resistance is connected with the other end of the 3rd resistor, and the one of the 4th resistance
There is second node between end and the other end of the 3rd resistor, the second node as the power amplification unit the
Four ends；
Second switch, the first end ground connection of the second switch, the second end of the second switch and the 4th electricity
The other end of resistance is connected, and the control terminal of the second switch is after the control terminal of the first switch tube is connected compared with described
The output end of device is connected.
4. driving circuit as claimed in claim 3, which is characterized in that the first switch tube is NPN type triode, described the
Two switching tubes are PNP type triode.
5. driving circuit as claimed in claim 3, which is characterized in that the switch unit includes third switching tube.
6. driving circuit as claimed in claim 5, which is characterized in that the third switching tube is metal-oxide-semiconductor.
7. driving circuit as described in claim 1, which is characterized in that the input signal is pwm signal.
8. a kind of mounted air conditioner system, which is characterized in that including driving circuit such as of any of claims 1-7.
9. a kind of vehicle, which is characterized in that including mounted air conditioner system as claimed in claim 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820732376.5U CN208585047U (en) | 2018-05-16 | 2018-05-16 | Drive circuit, on-vehicle air conditioning system and vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820732376.5U CN208585047U (en) | 2018-05-16 | 2018-05-16 | Drive circuit, on-vehicle air conditioning system and vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208585047U true CN208585047U (en) | 2019-03-08 |
Family
ID=65533813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820732376.5U Active CN208585047U (en) | 2018-05-16 | 2018-05-16 | Drive circuit, on-vehicle air conditioning system and vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208585047U (en) |
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2018
- 2018-05-16 CN CN201820732376.5U patent/CN208585047U/en active Active
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