CN209375130U - A kind of driver active discharge circuit, wiring board, motor and new-energy automobile - Google Patents
A kind of driver active discharge circuit, wiring board, motor and new-energy automobile Download PDFInfo
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- CN209375130U CN209375130U CN201822086043.2U CN201822086043U CN209375130U CN 209375130 U CN209375130 U CN 209375130U CN 201822086043 U CN201822086043 U CN 201822086043U CN 209375130 U CN209375130 U CN 209375130U
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- capacitor
- switch
- active discharge
- circuit
- buffer
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Abstract
The utility model discloses a kind of driver active discharge circuit, wiring board, motor and new-energy automobiles, the circuit includes: buffer circuit, bus capacitor, inverted power module, machine winding, power switch, buffer circuit includes first switch and buffer resistance, and the first switch is serially connected in power supply positive input terminal after connecting with buffering resistor coupled in parallel；Power switch one end is connected between first switch and buffer resistance, and the other end is connected to power supply negative input end.There are two types of discharge modes for circuit tool, and two kinds of discharge modes not only can be backed up mutually, but also can be mutually indepedent, lifting system redundancy；Single power pass need to only be increased using buffer resistance and open realization active discharge, save the cost.
Description
Technical field
The utility model relates to a kind of driver active discharge circuit, wiring board, motor and new-energy automobiles.
Background technique
The motor driver of new-energy automobile requires have active discharge function after cutoff high, releases on bus capacitor
Residual charge, make its voltage drop as low as within the scope of safe voltage, play safety protection function.The prior art usually only relies on
Parallel resistance is on capacitor come the residual charge on bus capacitor of releasing, pressure release low efficiency, and once breaks down, it may appear that nothing
If still moving under method active discharge or vehicle emergency, driving magneto induced potential is formed through inverted power module
Rectified voltage leads to not that capacitor is released within the scope of safe voltage in time.
Utility model content
The utility model embodiment is designed to provide a kind of driver active discharge circuit, wiring board, motor and new energy
Source automobile, to solve the above technical problems.
According to the first aspect of the utility model embodiment, a kind of driver active discharge circuit is provided, comprising:
Power supply positive input terminal and power supply negative input end, the present embodiment circuit pass through power supply positive input terminal and power supply negative input end
It is connected to high voltage power supply；
Buffer circuit comprising first switch and buffer resistance, the first switch are gone here and there after connecting with buffering resistor coupled in parallel
It connects in power supply positive input terminal；
Inverted power module, positive input terminal are connected to buffer resistance output end, and negative input end is connected to power supply negative input
End；
Bus capacitor is attempted by between the positive input terminal of inverted power module and negative input end；
Machine winding, input terminal are connected to the ac output end of inverted power module；
Power switch, one end are connected between first switch and buffer resistance, and the other end is connected to power supply negative input end.
In the embodiment of the driver active discharge circuit, the buffer circuit further includes counnter attack diode and second
After switch, the counnter attack diode and second switch are connected with buffer resistance, it is attempted by first switch both ends.
In the embodiment of the driver active discharge circuit, the inverted power module is equipped with bridge-type three-phase inversion electricity
Road.
In the embodiment of the driver active discharge circuit, the bus capacitor includes first capacitor, the second capacitor
It is in parallel with third capacitor after the first capacitor, the series connection of the second capacitor with third capacitor.
It further include bleeder resistance in the embodiment of the driver active discharge circuit, the bleeder resistance and bus
Capacitor is in parallel.
According to the second aspect of the utility model embodiment, a kind of driver active discharge wiring board is provided, it is described
Wiring board is equipped with circuit as described above.
According in terms of the third of the utility model embodiment, providing a kind of motor, the motor and as described above
Circuit connection.
According to the 4th of the utility model embodiment the aspect, a kind of new-energy automobile is provided, the automobile includes such as
The upper motor.
The utility model embodiment at least has the advantages that
1) there are two types of discharge modes for circuit tool, and two kinds of discharge modes not only can be backed up mutually, but also can be mutually indepedent, promote system
System redundancy；
2) buffer resistance is utilized, need to only increase single power pass and open realization active discharge, save the cost；
3) it such as collides under emergency, two kinds of discharge modes are simultaneously operable, and accelerate active discharge, to improve safety
Property；
4) under abnormal failure vehicle still operating status when, can also timely active discharge, to improve safety；
5) abnormal failure causes busbar voltage to be lifted, and using buffer resistance discharge voltage, guarantees that busbar voltage is working
In voltage range, system runs more secure and reliable.
Detailed description of the invention
The circuit diagram of the driver active discharge circuit of Fig. 1 the utility model embodiment.
Specific embodiment
As shown in Figure 1, the first aspect of the utility model embodiment, provides a kind of driver active discharge circuit.
The active discharge circuit is equipped with:
Power supply positive input terminal and power supply negative input end, the present embodiment circuit pass through power supply positive input terminal and power supply negative input end
It is connected to high voltage power supply.
Buffer circuit comprising first switch K1 and buffer resistance R2, the first switch K1 and buffer resistance R2 are in parallel
Power supply positive input terminal is serially connected in after connection.The characteristic of capacitor is that voltage cannot be mutated, therefore in moment of closing a floodgate, capacitance voltage is very
It is low, substantially it is considered that instantaneous short circuit, therefore very big impact is caused to power supply, this electric current is enough to make to protect fuse molten
It is disconnected, therefore buffer circuit must be set before inverted power module.Buffer circuit working principle is: when input terminal applies voltage,
Buffer resistance R2 is first passed through to capacitor charging, when capacitance voltage is charged to certain value, first switch K1 is attracted, and buffer resistance R2 is short
Road, inverted power module, which is opened, to be worked normally.Optionally, the buffer circuit further includes counnter attack diode D and second switch K2,
After the counnter attack diode D and second switch K2 connects with buffer resistance R2, it is attempted by the both ends first switch K1.Counnter attack diode
D and second switch K2 primarily serves counnter attack and Fault Isolation effect.
Inverted power module IGBT, positive input terminal are connected to buffer resistance R2 output end, and negative input end is connected to power supply
Negative input end.Optionally, inverted power module IGBT is bridge-type three-phase inverting circuit.
Bus capacitor is attempted by between the positive input terminal and negative input end of inverted power module IGBT, major function
It is the voltage ripple for filtering flat input circuit, makes DC voltage temperature.Optionally, the bus capacitor includes first capacitor Y1,
It is in parallel with third capacitor C after two capacitor Y2 and third capacitor C, the first capacitor Y1, the second capacitor Y2 series connection.First capacitor
Y capacitance can be used in Y1, the second capacitor Y2, and thin-film capacitor can be used in third capacitor C.
Machine winding, three-phase input end are respectively connected to the ac output end of inverted power module IGBT.
Power switch S, one end are connected between first switch and buffer resistance R2, and the other end is connected to power supply negative input
End.
To improve discharge voltage efficiency, bleeder resistance R1, the bleeder resistance R1 can be added in active discharge circuit
It is in parallel with bus capacitor.
It will be appreciated that electromagnetic touch can be used in the first switch K1 of the present embodiment, second switch K2 and power switch S
Device.
The present embodiment is only to increase a power switch S on drive system, realizes system-level active discharge, is led
There are two types of dynamic discharge loops: one is discharged using inverted power module IGBT control machine winding, and driver receives vehicle VCU master
High voltage direct current on bus capacitor is converted to motor by dynamic electric discharge instruction, driver control inverted power module IGBT unit
The alternating current of receiving, energy are discharged into machine winding, reach voltage in safe range；Secondly adding function using buffer resistance R2
Rate switch S electric discharge, driver receive the instruction of vehicle VCU active discharge, and closed power switch S forms Releasing loop, by bus electricity
High voltage direct current in appearance is consumed through bleeder resistance, reaches voltage in safe range.
It will be appreciated that when drive system needs active discharge, it can be by selecting in the present embodiment circuit wherein
One discharge loop electric discharge, can also be discharged by two discharge loops, simultaneously to meet the active release under the various operating conditions of vehicle
Electricity demanding.It for example, can there are several types of discharge modes:
A, it under normal circumstances, is discharged with inverted power module IGBT control machine winding, buffer resistance R2 adds power switch S
Electric discharge is used as carrying out safety backup；
B, it such as collides under emergency, active discharge need to be accelerated, inverted power module IGBT control machine winding is put
Electrical circuit, buffer resistance R2 add power switch S discharge loop to work at the same time；
C, when one of discharge loop fails, active discharge is carried out by another discharge loop；
If d, still being moved under vehicle emergency, by inverted power module IGBT be shorted on motor three winding or lower three around
Group, simultaneous buffering resistance R2 add power switch S electric discharge realization quickly to discharge；
E, vehicle operational process occurs abnormal, causes busbar voltage to be lifted, buffer resistance R2 can be used and add power switch S tune
Section guarantees busbar voltage in operating voltage range, to protect inverted power module IGBT.
The second aspect of the utility model embodiment provides a kind of driver active discharge wiring board, the route
Plate is integrated with circuit as described above.In practical application, the wiring board for being integrated with circuit as described above can be arranged and drive
In device, the active discharge function of driver is realized.
In terms of the third of the utility model embodiment, a kind of motor, the motor and circuit as described above are provided
Connection, active discharge circuit realize electric discharge using the winding of motor.
4th aspect of the utility model embodiment, provides a kind of new-energy automobile, the automobile includes institute as above
The motor stated.New-energy automobile makes the peace of its drive system using the motor for being connected to active discharge circuit as described above
Full performance greatly improves.
Certainly, the above description is not intended to limit the present invention, and the utility model is also not limited to the example above,
The variations, modifications, additions or substitutions that those skilled in the art are made in the essential scope of the utility model, are also answered
Belong to the protection scope of the utility model.
Claims (8)
1. a kind of driver active discharge circuit characterized by comprising
Power supply positive input terminal and power supply negative input end；
Buffer circuit comprising first switch and buffer resistance, the first switch are serially connected in after connecting with buffering resistor coupled in parallel
Power supply positive input terminal；
Inverted power module, positive input terminal are connected to buffer resistance output end, and negative input end is connected to power supply negative input end；
Bus capacitor is attempted by between the positive input terminal of inverted power module and negative input end；
Machine winding, input terminal are connected to the ac output end of inverted power module；
Power switch, one end are connected between first switch and buffer resistance, and the other end is connected to negative output terminal.
2. a kind of driver active discharge circuit according to claim 1, which is characterized in that the buffer circuit further includes
After counnter attack diode and second switch, the counnter attack diode and second switch are connected with buffer resistance, it is attempted by first switch
Both ends.
3. a kind of driver active discharge circuit according to claim 1, which is characterized in that the inverted power module is set
There is bridge-type three-phase inverting circuit.
4. a kind of driver active discharge circuit according to claim 1, which is characterized in that the bus capacitor includes the
One capacitor, the second capacitor and third capacitor, it is in parallel with third capacitor after the first capacitor, the series connection of the second capacitor, wherein first
Capacitor, the second capacitor are safety capacitor, and third capacitor is thin-film capacitor.
5. a kind of driver active discharge circuit according to claim 1, which is characterized in that it further include bleeder resistance, institute
It is in parallel with bus capacitor to state bleeder resistance.
6. a kind of driver active discharge wiring board, which is characterized in that it is any described that the wiring board is equipped with claim 1-5
Circuit.
7. a kind of motor, which is characterized in that the motor and any circuit connection of claim 1-5.
8. a kind of new-energy automobile, which is characterized in that the automobile includes motor as claimed in claim 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822086043.2U CN209375130U (en) | 2018-12-12 | 2018-12-12 | A kind of driver active discharge circuit, wiring board, motor and new-energy automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822086043.2U CN209375130U (en) | 2018-12-12 | 2018-12-12 | A kind of driver active discharge circuit, wiring board, motor and new-energy automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209375130U true CN209375130U (en) | 2019-09-10 |
Family
ID=67832319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201822086043.2U Active CN209375130U (en) | 2018-12-12 | 2018-12-12 | A kind of driver active discharge circuit, wiring board, motor and new-energy automobile |
Country Status (1)
| Country | Link |
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| CN (1) | CN209375130U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113595374A (en) * | 2021-08-09 | 2021-11-02 | 合肥阳光电动力科技有限公司 | Active discharge method and controller of power converter |
| CN114597882A (en) * | 2022-03-18 | 2022-06-07 | 乐歌人体工学科技股份有限公司 | Motor drive circuit for preventing reverse electromotive force |
-
2018
- 2018-12-12 CN CN201822086043.2U patent/CN209375130U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113595374A (en) * | 2021-08-09 | 2021-11-02 | 合肥阳光电动力科技有限公司 | Active discharge method and controller of power converter |
| CN114597882A (en) * | 2022-03-18 | 2022-06-07 | 乐歌人体工学科技股份有限公司 | Motor drive circuit for preventing reverse electromotive force |
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