CN207530722U - vehicle-mounted inverter circuit - Google Patents
vehicle-mounted inverter circuit Download PDFInfo
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- CN207530722U CN207530722U CN201721680064.6U CN201721680064U CN207530722U CN 207530722 U CN207530722 U CN 207530722U CN 201721680064 U CN201721680064 U CN 201721680064U CN 207530722 U CN207530722 U CN 207530722U
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Abstract
The utility model provides a kind of vehicle-mounted inverter circuit, including：Boost conversion circuit, median filter circuit, inverter circuit, microcontroller, output filter circuit, alternating voltage input detecting circuit, alternating voltage RMS to DC circuit, switch K1, voltage feedback circuit, cell voltage monitoring circuit, builtin voltage supply circuit and at least one current sensor CT；The input terminal of boost conversion circuit is for connecting cell voltage Vbat, and output voltage is higher than the busbar voltage Vbus of Vbat under Micro-processor MCV control；Busbar voltage Vbus inputs inverter circuit after median filter circuit filtering, and inverter circuit supplies the alternating voltage of output for generating；Inverter circuit connects inverter ac output terminal by output filter circuit；Voltage feedback circuit generates feedback voltage signal and exports to microcontroller and boost conversion circuit respectively；The utility model can automatically switch external communication voltage.
Description
Technical field
The utility model is related to a kind of vehicle-mounted inverter, especially a kind of vehicle-mounted inverter circuit.
Background technology
Vehicle-mounted inverter（Power supply changeover device, Power Inverter）DC12V direct currents can be converted to and alternating current phase
Same AC220V alternating currents use for general electric appliance, are a kind of convenient power supply converter for vehicle.
There are many circuit structure of vehicle-mounted inverter, and how the circuit that design work is stablized, which is that designer is needed to be considered, is asked
One of topic；
The DC inverter of on-vehicle battery can only be AC 220v alternating currents by existing vehicle-mounted inverter, can not be cut automatically
Change external AC 220v alternating currents.
Invention content
The purpose of the utility model is to overcome the deficiencies in the prior art, provide a kind of vehicle-mounted inverter circuit,
Circuit structure is reasonable, can outside have alternating voltage input when quickly automatically switch to external communication electricity so that in vehicle
It, can be with the alternating current of user-friendly external electrical network without using the electric energy inside on-vehicle battery during parking.The utility model is adopted
Technical solution is：
A kind of vehicle-mounted inverter circuit, including：
Boost conversion circuit, median filter circuit, inverter circuit, microcontroller, output filter circuit, alternating voltage
Input detecting circuit, alternating voltage RMS to DC circuit, switch K1, voltage feedback circuit, cell voltage monitoring circuit, interior
Portion's voltage supply circuit and at least one current sensor CT；
The input terminal of boost conversion circuit is for connecting cell voltage Vbat, the output voltage under Micro-processor MCV control
Busbar voltage Vbus higher than Vbat；
Busbar voltage Vbus inputs inverter circuit after median filter circuit filtering, and inverter circuit supplies for generating
The alternating voltage gone out；Inverter circuit connects inverter ac output terminal by output filter circuit；
The busbar voltage Vbus that the input termination boost conversion circuit of voltage feedback circuit generates, and feedback electricity is generated respectively
Pressure signal is exported to microcontroller and boost conversion circuit；
By current sensor CT detect boost conversion circuit input current and/or inverter circuit input current and/
Or the output current of inverter circuit, and feed back to microcontroller；
For connecting cell voltage Vbat, output terminal is fed back the input terminal of cell voltage monitoring circuit to microcontroller
Cell voltage monitoring signal；
The input terminal of builtin voltage supply circuit needs for connecting cell voltage Vbat, and generating in vehicle-mounted inverter circuit
Each DC voltage wanted；
The input terminal of two ac voltage input detecting circuit connects the two-terminal of inverter ac input terminal, output terminal respectively
Respectively to microcontroller feedback communication voltage detection signal；The first termination inverter ac input terminal of switch K1, switching
The input terminal of the second termination alternating voltage RMS to DC circuit of device K1, the output termination of alternating voltage RMS to DC circuit
Inverter ac output terminal；Switch K1 is controlled by Micro-processor MCV；The feedback termination of alternating voltage RMS to DC circuit is micro-
Processor MCU.
Further, boost conversion circuit includes isolating transformer T1, NMOS tube Q1, Q2, rectifier bridge RCT1, gate-drive
Circuit, PWM controller U1；
The switching signal of the input termination microcontroller output of PWM controller U1, PWM controller U1 connections gate pole drive
Dynamic circuit, the output terminal of two opposite in phase of gate drive circuit connect NMOS tube Q1 grids and Q2 grids respectively；NMOS tube Q1,
The source electrode of Q2 connects primary ground, and the drain electrode of NMOS tube Q1 connects isolating transformer T1 primary one end, and the drain electrode of NMOS tube Q2 connects isolation
The transformer T1 primary other ends, the primary centre tap of isolating transformer T1 are used to connect anode；Isolating transformer T1's
Secondary both ends connect two input terminals of rectifier bridge RCT1 respectively；The feedback voltage signal all the way of voltage feedback circuit connects PWM controller
U1。
Further, the first electric current is set on the line between anode and isolating transformer T1 primary centre taps
Sensor CT1 feeds back for the input current for detecting boost conversion circuit and to microcontroller.
Further, median filter circuit includes inductance L1 and capacitance C2, and a termination rectifier bridge RCT1 of inductance L1 is just
Output terminal, another termination capacitor C2 one end；The negative output termination capacitor C2 other ends and secondary ground of rectifier bridge RCT1.
Further, inverter circuit includes inverter controller U2, U3, NMOS tube Q3, Q4, Q5, Q6；
Inverter controller U2, U3 are all connected with and are controlled by Micro-processor MCV；Two driving end difference of inverter controller U2
Connecing the grid of NMOS tube Q3, Q4, two driving ends of inverter controller U3 connect the grid of NMOS tube Q5, Q6 respectively, NMOS tube Q4,
The source electrode of Q6 connects secondary ground；The drain electrode of NMOS tube Q3, Q5 connects the other end of inductance L1；The source electrode of Q3 is connected and is made with the drain electrode of Q4
For the high-end output terminal of inverter circuit, the drain electrode connection of the source electrode and Q6 of Q5 and as the low side output terminal of inverter circuit.
Further, it is equipped with electrical isolation element in inverter controller U2, U3 and Micro-processor MCV connection branch.
Further, on the inductance L1 other ends and the line of NMOS tube Q3, Q5 drain electrode, equipped with the second current sensor
CT2 feeds back for the input current for detecting inverter circuit and to microcontroller.
Further, output filter circuit includes inductance L2 and capacitance C3；The one of inductance L2 terminates the high-end of inverter circuit
Output terminal, another termination capacitor C3 one end, the bottom end output terminal of another termination inverter circuit of capacitance C3；It uses at the both ends of capacitance C3
In connecing inverter ac output terminal.
Further, on the line between the high-end output terminal of inverter circuit and inductance L2, equipped with third current sensor
CT3 feeds back for the output current for detecting inverter circuit and to microcontroller.
Further, temperature sensor is set on isolating transformer T1, for generating the temperature detection of isolating transformer T1
Signal is simultaneously fed back to Micro-processor MCV；
Set temperature sensor on radiator in inverter circuit, for generate inverter circuit temperature detection signal and to
Micro-processor MCV is fed back.
The utility model has the advantage of：
1）Comprehensive defencive function has overcurrent protection, high temperature protection, over-current over-voltage protection etc..
2）Automatic detection external communication control source, automatically switches external communication voltage.
3）With temperature compensation function, use temperature range is wide：- 35 DEG C~+50 DEG C.
Description of the drawings
Fig. 1 is the circuit block diagram of the utility model.
Fig. 2 is the circuit diagram of the utility model.
Specific embodiment
With reference to specific drawings and examples, the utility model is described in further detail.
As shown in Figure 1, the utility model provides a kind of vehicle-mounted inverter circuit, including：
Boost conversion circuit 1, median filter circuit 2, inverter circuit 3, microcontroller, output filter circuit 4, exchange
Control source detection circuit 5, alternating voltage RMS to DC circuit 6, switch K1, voltage feedback circuit 7, cell voltage monitoring
Circuit 8, builtin voltage supply circuit 9 and at least one current sensor CT；
The input terminal of boost conversion circuit 1 is for connecting cell voltage Vbat, the output voltage under Micro-processor MCV control
Busbar voltage Vbus higher than Vbat；
Busbar voltage Vbus inputs inverter circuit 3 after the filtering of median filter circuit 2, and inverter circuit 3 supplies for generating
The alternating voltage of output；Inverter circuit 3 connects inverter ac output terminal by output filter circuit 4；
The busbar voltage Vbus that the input termination boost conversion circuit 1 of voltage feedback circuit 7 generates, and feedback is generated respectively
Voltage signal is exported to microcontroller and boost conversion circuit 1；Electrical isolation element is equipped in voltage feedback circuit 7, such as
Photoelectrical coupler；
The input current of boost conversion circuit 1 and/or the input current of inverter circuit 3 are detected by current sensor CT
And/or the output current of inverter circuit 3, and feed back to microcontroller；
For connecting cell voltage Vbat, output terminal is fed back the input terminal of cell voltage monitoring circuit 8 to microcontroller
Cell voltage monitoring signal；
The input terminal of builtin voltage supply circuit 9 is used to connect cell voltage Vbat, and generate in vehicle-mounted inverter circuit
Each DC voltage needed, such as the 5v voltages, inverse that 15v voltages, the microcontroller needed in boost conversion circuit 1 needs
Become 15v voltages needed in circuit 3 etc.；
The input terminal of two ac voltage input detecting circuit 5 connects the two-terminal of inverter ac input terminal respectively, output
End is respectively to microcontroller feedback communication voltage detection signal；The first termination inverter ac input terminal of switch K1, cuts
The input terminal of the second termination alternating voltage RMS to DC circuit 6 of parallel operation K1, the output of alternating voltage RMS to DC circuit 6
Terminate inverter ac output terminal；Switch K1 is controlled by Micro-processor MCV；The feedback of alternating voltage RMS to DC circuit 6
Terminate Micro-processor MCV；
Each section circuit is specifically described below；
Using push-pull type translation circuit in 1 this example of boost conversion circuit, including isolating transformer T1, NMOS tube Q1, Q2, whole
Flow bridge RCT1, gate drive circuit 101, PWM controller U1；SG3525 can be used in U1；
The switching signal of the input termination microcontroller output of PWM controller U1, PWM controller U1 connections gate pole drive
Dynamic circuit 101, the output terminal of two opposite in phase of gate drive circuit 101 connect NMOS tube Q1 grids and Q2 grids respectively；
The source electrode of NMOS tube Q1, Q2 connects primary ground, and the drain electrode of NMOS tube Q1 connects isolating transformer T1 primary one end, the leakage of NMOS tube Q2
Pole connects the isolating transformer T1 primary other ends, and the primary centre tap of isolating transformer T1 is used to connect anode；Isolation becomes
The secondary both ends of depressor T1 connect two input terminals of rectifier bridge RCT1 respectively；The feedback voltage signal all the way of voltage feedback circuit 7 connects
PWM controller U1；
Electrical isolation element, such as photoelectrical coupler are equipped in gate drive circuit 101；In Fig. 1 there are the place of ISO
Equipped with electrical isolation element；
More preferably, the first electric current is set to pass on the line between anode and isolating transformer T1 primary centre taps
Sensor CT1 feeds back for the input current for detecting boost conversion circuit 1 and to microcontroller；
More preferably, the input terminal of boost conversion circuit 1 is also parallel with filter capacitor C1；Between battery and boost conversion circuit 1
It is additionally provided with fuse F1；
Median filter circuit 2 includes inductance L1 and capacitance C2, and the one of inductance L1 terminates the positive output end of rectifier bridge RCT1, separately
One termination capacitor C2 one end；The negative output termination capacitor C2 other ends and secondary ground of rectifier bridge RCT1；
Using full bridge inverter in 3 this example of inverter circuit, including inverter controller U2, U3, NMOS tube Q3, Q4, Q5,
Q6；Wherein U2 and U3 uses L6386E；
Inverter controller U2, U3 are all connected with and are controlled by Micro-processor MCV, in inverter controller U2, U3 and microprocessor
Electrical isolation element, such as photoelectrical coupler are equipped in MCU connection branches；Two driving ends of inverter controller U2 connect respectively
The grid of NMOS tube Q3, Q4, two driving ends of inverter controller U3 connect the grid of NMOS tube Q5, Q6, NMOS tube Q4, Q6 respectively
Source electrode connect secondary ground；The drain electrode of NMOS tube Q3, Q5 connects the other end of inductance L1；The source electrode of Q3 is connected with the drain electrode of Q4 and conduct
The high-end output terminal of inverter circuit 3, the drain electrode of the source electrode and Q6 of Q5 connect and as the low side output terminal of inverter circuit 3；
More preferably, on the inductance L1 other ends and the line of NMOS tube Q3, Q5 drain electrode, equipped with the second current sensor CT2,
It feeds back for the input current for detecting inverter circuit 3 and to microcontroller；
Output filter circuit 4 includes inductance L2 and capacitance C3；The high-end output terminal of a termination inverter circuit 3 of inductance L2,
Another termination capacitor C3 one end, the bottom end output terminal of another termination inverter circuit 3 of capacitance C3；The both ends of capacitance C3 are inverse for connecing
Become device ac output end；Preferably, it is equipped with fuse F2 in inverter ac output terminal；
More preferably, on the line between 3 high-end output terminal of inverter circuit and inductance L2, equipped with third current sensor
CT3 feeds back for the output current for detecting inverter circuit 3 and to microcontroller；
More preferably,
Temperature sensor is set on isolating transformer T1, for the temperature detection signal that generates isolating transformer T1 and to micro-
Processor MCU is fed back；
Set temperature sensor on radiator in inverter circuit 3, for generating inverter circuit temperature detection signal simultaneously
It is fed back to Micro-processor MCV；Radiator in inverter circuit 3 is connect with NMOS tube Q3, Q4, Q5, Q6；
Micro-processor MCV is also connected with a fan control circuitry 10, and the rotating speed of fan is controlled by fan control circuitry 10；
Micro-processor MCV is also connected with a buzzer, for generating alerting tone；
Microprocessor is also connected with one remote control port Remote of indication LED and connection.
The vehicle-mounted inverter circuit monitors external electrical network exchange input in real time, if any external communication control source, stops immediately
Non-return change（Microprocessor control inverter circuit 3 is stopped）, inputted by the way that switch K1 is controlled to then switch to external communication.
The vehicle-mounted inverter circuit monitors battery status in real time, avoids battery over-discharge.And there is temperature compensation function,
Use temperature range is wide：- 35 DEG C~+50 DEG C.
It should be noted last that more than specific embodiment is only to illustrate the technical solution of the utility model rather than limit
System, although the utility model is described in detail with reference to example, it will be understood by those of ordinary skill in the art that, it can be right
The technical solution of the utility model is modified or replaced equivalently, without departing from the spirit and model of technical solutions of the utility model
It encloses, should all cover in the right of the utility model.
Claims (10)
1. a kind of vehicle-mounted inverter circuit, which is characterized in that including：
Boost conversion circuit (1), median filter circuit (2), inverter circuit (3), microcontroller, output filter circuit (4),
Alternating voltage input detecting circuit (5), alternating voltage RMS to DC circuit (6), switch K1, voltage feedback circuit (7), electricity
Cell voltage monitoring circuit (8), builtin voltage supply circuit (9) and at least one current sensor CT；
The input terminal of boost conversion circuit (1) is for connecting cell voltage Vbat, and output voltage is high under Micro-processor MCV control
In the busbar voltage Vbus of Vbat；
Busbar voltage Vbus inputs inverter circuit (3) after median filter circuit (2) filtering, and inverter circuit (3) is for generating
For the alternating voltage of output；Inverter circuit (3) connects inverter ac output terminal by output filter circuit (4)；
The busbar voltage Vbus that the input termination boost conversion circuit (1) of voltage feedback circuit (7) generates, and feedback is generated respectively
Voltage signal is exported to microcontroller and boost conversion circuit (1)；
The input current of boost conversion circuit (1) and/or the input current of inverter circuit (3) are detected by current sensor CT
And/or the output current of inverter circuit (3), and feed back to microcontroller；
For the input terminal of cell voltage monitoring circuit (8) for connecting cell voltage Vbat, output terminal feeds back electricity to microcontroller
Cell voltage monitoring signal；
The input terminal of builtin voltage supply circuit (9) needs for connecting cell voltage Vbat, and generating in vehicle-mounted inverter circuit
Each DC voltage wanted；
The input terminal of two ac voltage input detecting circuit (5) connects the two-terminal of inverter ac input terminal, output terminal respectively
Respectively to microcontroller feedback communication voltage detection signal；The first termination inverter ac input terminal of switch K1, switching
Device K1 second termination alternating voltage RMS to DC circuit (6) input terminal, alternating voltage RMS to DC circuit (6) it is defeated
Go out to terminate inverter ac output terminal；Switch K1 is controlled by Micro-processor MCV；Alternating voltage RMS to DC circuit (6)
Feedback termination Micro-processor MCV.
2. vehicle-mounted inverter circuit as described in claim 1, which is characterized in that
Boost conversion circuit (1) including isolating transformer T1, NMOS tube Q1, Q2, rectifier bridge RCT1, gate drive circuit (101),
PWM controller U1；
The switching signal of the input termination microcontroller output of PWM controller U1, PWM controller U1 connections gate-drive electricity
Road (101), the output terminal of two opposite in phase of gate drive circuit (101) connect NMOS tube Q1 grids and Q2 grids respectively；
The source electrode of NMOS tube Q1, Q2 connects primary ground, and the drain electrode of NMOS tube Q1 connects isolating transformer T1 primary one end, the leakage of NMOS tube Q2
Pole connects the isolating transformer T1 primary other ends, and the primary centre tap of isolating transformer T1 is used to connect anode；Isolation becomes
The secondary both ends of depressor T1 connect two input terminals of rectifier bridge RCT1 respectively；The feedback voltage signal all the way of voltage feedback circuit (7)
Meet PWM controller U1.
3. vehicle-mounted inverter circuit as claimed in claim 2, which is characterized in that
First current sensor CT1 on the line between anode and isolating transformer T1 primary centre taps is set, is used
It is fed back in the input current for detecting boost conversion circuit (1) and to microcontroller.
4. vehicle-mounted inverter circuit as claimed in claim 2, which is characterized in that
Median filter circuit (2) includes inductance L1 and capacitance C2, and the positive output end of a termination rectifier bridge RCT1 of inductance L1 is another
Termination capacitor C2 one end；The negative output termination capacitor C2 other ends and secondary ground of rectifier bridge RCT1.
5. vehicle-mounted inverter circuit as claimed in claim 4, which is characterized in that
Inverter circuit (3) includes inverter controller U2, U3, NMOS tube Q3, Q4, Q5, Q6；
Inverter controller U2, U3 are all connected with and are controlled by Micro-processor MCV；Two driving ends of inverter controller U2 connect respectively
The grid of NMOS tube Q3, Q4, two driving ends of inverter controller U3 connect the grid of NMOS tube Q5, Q6, NMOS tube Q4, Q6 respectively
Source electrode connect secondary ground；The drain electrode of NMOS tube Q3, Q5 connects the other end of inductance L1；The source electrode of Q3 is connected with the drain electrode of Q4 and conduct
The high-end output terminal of inverter circuit (3), the source electrode of Q5 connect with the drain electrode of Q6 and are used as the low side output terminal of inverter circuit (3).
6. vehicle-mounted inverter circuit as claimed in claim 5, which is characterized in that
Electrical isolation element is equipped in inverter controller U2, U3 and Micro-processor MCV connection branch.
7. vehicle-mounted inverter circuit as claimed in claim 5, which is characterized in that
It is inverse for detecting equipped with the second current sensor CT2 on the inductance L1 other ends and the line of NMOS tube Q3, Q5 drain electrode
Become the input current of circuit (3) and fed back to microcontroller.
8. vehicle-mounted inverter circuit as claimed in claim 5, which is characterized in that
Output filter circuit (4) includes inductance L2 and capacitance C3；The high-end output terminal of a termination inverter circuit (3) of inductance L2,
Another termination capacitor C3 one end, the bottom end output terminal of another termination inverter circuit (3) of capacitance C3；The both ends of capacitance C3 are used to connect
Inverter ac output terminal.
9. vehicle-mounted inverter circuit as claimed in claim 8, which is characterized in that
On line between the high-end output terminal of inverter circuit (3) and inductance L2, equipped with third current sensor CT3, for examining
It surveys the output current of inverter circuit (3) and is fed back to microcontroller.
10. vehicle-mounted inverter circuit as claimed in claim 2, which is characterized in that
Temperature sensor is set on isolating transformer T1, for the temperature detection signal that generates isolating transformer T1 and to microprocessor
Device MCU is fed back；
Set temperature sensor on radiator in inverter circuit (3), for generate inverter circuit temperature detection signal and to
Micro-processor MCV is fed back.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721680064.6U CN207530722U (en) | 2017-12-06 | 2017-12-06 | vehicle-mounted inverter circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721680064.6U CN207530722U (en) | 2017-12-06 | 2017-12-06 | vehicle-mounted inverter circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207530722U true CN207530722U (en) | 2018-06-22 |
Family
ID=62577725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721680064.6U Active CN207530722U (en) | 2017-12-06 | 2017-12-06 | vehicle-mounted inverter circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207530722U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863898A (en) * | 2017-12-06 | 2018-03-30 | 帝发技术(无锡)有限公司 | Vehicle-mounted inverter circuit |
| CN110509869A (en) * | 2019-09-05 | 2019-11-29 | 陕西致新电子科技有限公司 | A kind of intelligent vehicle-carried inverter system and its control method |
-
2017
- 2017-12-06 CN CN201721680064.6U patent/CN207530722U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863898A (en) * | 2017-12-06 | 2018-03-30 | 帝发技术(无锡)有限公司 | Vehicle-mounted inverter circuit |
| CN110509869A (en) * | 2019-09-05 | 2019-11-29 | 陕西致新电子科技有限公司 | A kind of intelligent vehicle-carried inverter system and its control method |
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