CN207926432U - A kind of switching device parallel current-sharing system - Google Patents
A kind of switching device parallel current-sharing system Download PDFInfo
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- CN207926432U CN207926432U CN201820394756.2U CN201820394756U CN207926432U CN 207926432 U CN207926432 U CN 207926432U CN 201820394756 U CN201820394756 U CN 201820394756U CN 207926432 U CN207926432 U CN 207926432U
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Abstract
A kind of switching device parallel current-sharing system, including：Switching device parallel module and transformer current-sharing module, the switching device parallel module includes at least two switching devices being connected in parallel to each other, the transformer current-sharing module includes at least one transformer, the first end of the switching device is all connected with the input terminal of the transformer current-sharing module, the control terminal of the switching device be all connected with the output end of the transformer current-sharing module with control flow through the switching device electric current it is equal, the second end of switching device ground connection.Implement the switching device parallel current-sharing system of the utility model, by the secondary coil both ends that the control terminal of parallel switching devices is connected to transformer, it forces so that the electric current of parallel switching devices is equal, further, the switching device parallel current-sharing system of the utility model can be flexibly applied to the stream of various types of switching device parallel modules.Further, the switch time of switching device is equally forced to synchronize.
Description
Technical field
The utility model is related to switching device fields, more specifically to a kind of switching device parallel current-sharing system.
Background technology
Electronic switching device such as IGBT there is a situation where used in parallel in power conversion circuit.In order to reduce derailing switch
Parameter discrete type between part, in parallel connection is applied, the good IGBT of generally use consistency is in parallel, and in circuit design and layout
The middle distributed constant consistency ensured between each IGBT, controls the same same batch of producer's model in production.However, such method is not
Unevenness flow phenomenon in parallel caused by the evitable discreteness for being caused by device discreteness and peripheral components parameter, and for
Parameter discrete degree is unpredictable.
Utility model content
The technical problem to be solved by the present invention is to for the drawbacks described above of the prior art, provide a kind of so that simultaneously
Connection switching device forces the switching device parallel current-sharing system flowed.
Technical solution adopted by the utility model to solve its technical problems is：Construct a kind of switching device parallel current-sharing system
System, including：Switching device parallel module and transformer current-sharing module, the switching device parallel module include at least two each other
Switching device in parallel, the transformer current-sharing module includes at least one transformer, and the first end of the switching device connects
The input terminal of the transformer current-sharing module is connect, the control terminal of the switching device is all connected with the defeated of the transformer current-sharing module
Outlet with control flow through the switching device electric current it is equal, the second end of switching device ground connection.
In switching device parallel current-sharing system described in the utility model, the switching device parallel module includes each other
First switch device and second switch device in parallel, the transformer current-sharing module include the first transformer, and described first becomes
Depressor includes the first secondary transformer, the first transformer primary side first coil and first the second coil of transformer primary side, institute
The control terminal for stating first switch device is connected to the first end of first secondary transformer, the second switch device
Control terminal is connected to the second end of first secondary transformer, the first end connection of the first switch device described the
The first end of one transformer primary side first coil, the first end of the second switch device connect first transformer primary side the
The second end of two coil, the second end of the first transformer primary side first coil and second coil of the first transformer primary side
First end be connected, the second end of the first switch device and the second switch device is grounded.
In switching device parallel current-sharing system described in the utility model, the first transformer primary side first coil and
The turn ratio of first transformer primary side, second coil is 1:1.
In switching device parallel current-sharing system described in the utility model, the switching device parallel module further wraps
Include the third switching device in parallel with the first switch device and the second switch device, the transformer current-sharing module packet
Include the second transformer, second transformer includes the second secondary transformer, the second transformer primary side first coil and the
The midpoint of two the second coils of transformer primary side, first secondary transformer connects the second transformer primary side First Line
The first end of circle, the control terminal of the third switching device connect the second end of second secondary transformer, and described
The first end of three switching devices connects the second end of second coil of the second transformer primary side, second transformer primary side
The first end of two coil connects the second end of the second transformer primary side first coil, the second transformer primary side First Line
The first end of circle connects the second end of the first transformer primary side first coil and second line of the first transformer primary side
The first end of circle, the second end ground connection of the third switching device.
In switching device parallel current-sharing system described in the utility model, the first transformer primary side first coil and
The turn ratio of first transformer primary side, second coil is 1:1；The second transformer primary side first coil and described second
The turn ratio of the second coil of transformer primary side is 1:2.
In switching device parallel current-sharing system described in the utility model, the switching device parallel module further wraps
Fourth-the N switching device in parallel with the first switch device and the second switch device is included, the transformer flows mould
Block includes third transformer the-the N-1 transformers, and wherein N is the positive integer more than 4.
In switching device parallel current-sharing system described in the utility model, the switching device parallel module further wraps
The third switching device and the 4th switching device being connected in parallel to each other are included, the transformer current-sharing module includes the second transformer and third
Transformer, the third switching device being connected in parallel to each other and the 4th switching device and the first switch device being connected in parallel to each other and
Second switch device is connected in parallel to each other, and second transformer includes the second secondary transformer, the second transformer primary side first
Coil and second the second coil of transformer primary side, the third transformer include third secondary transformer, third transformer
The second coil of primary side first coil and third transformer primary side, the control terminal of the third switching device are connected to described second and become
The first end of depressor secondary coil, the control terminal of the 4th switching device are connected to the of second secondary transformer
Two ends, the first end of the third switching device connect the first end of the second transformer primary side first coil, and the described 4th
The first end of switching device connects the second end of second coil of the second transformer primary side, second transformer primary side first
The second end of coil is connected with the first end of second coil of the second transformer primary side, the third switching device and described
The second end of four switching devices is grounded；The midpoint of first secondary transformer connects the third transformer secondary line
The first end of circle, second secondary transformer midpoint connect the second end of the third secondary transformer, institute
State the first transformer primary side first coil second end connected with the first end of second coil of the first transformer primary side described in
The first end of third transformer primary side first coil, the second end of the second transformer primary side first coil and described second become
The first end of the second coil of depressor primary side connects the second end of second coil of third transformer primary side, the third transformer
The first end of the second coil of primary side connects the second end of the third transformer primary side first coil.
In switching device parallel current-sharing system described in the utility model, the first transformer primary side first coil and
The turn ratio of first transformer primary side, second coil is 1:1；The second transformer primary side first coil and described second
The turn ratio of the second coil of transformer primary side is 1:1；The third transformer primary side first coil and the third transformer primary
The turn ratio of the second coil of side is 1:1.
In switching device parallel current-sharing system described in the utility model, further comprise being connected to the transformer equal
The cathode of loading-diode between flow module and power supply and load inductance, the loading-diode connects the power supply, anode
Connect the input terminal of the transformer current-sharing module, one end of the load inductance connects the power supply, described in other end connection
The input terminal of transformer current-sharing module.
In switching device parallel current-sharing system described in the utility model, the switching device include IGBT and
MOSFET, the transformer are magnetic ring transformer.
The switching device parallel current-sharing system for implementing the utility model, by the way that the control terminal of parallel switching devices to be connected to
The secondary coil both ends of transformer force to make the electric current of parallel switching devices equal, further, the switch of the utility model
Device parallel current-sharing system can be flexibly applied to the stream of various types of switching device parallel modules.Further, it switchs
The switch time of device is equally forced to synchronize.
Description of the drawings
Below in conjunction with accompanying drawings and embodiments, the utility model is described in further detail, in attached drawing：
Fig. 1 is the functional block diagram of the first embodiment of the switching device parallel current-sharing system of the utility model；
Fig. 2 is the circuit diagram of the second embodiment of the switching device parallel current-sharing system of the utility model；
Fig. 3 is the circuit diagram of the 3rd embodiment of the switching device parallel current-sharing system of the utility model；
Fig. 4 is the circuit diagram of the fourth embodiment of the switching device parallel current-sharing system of the utility model.
Specific implementation mode
In order to make the purpose of the utility model, technical solutions and advantages more clearly understood, below in conjunction with attached drawing and implementation
Example, the present invention will be further described in detail.It should be appreciated that specific embodiment described herein is only used to explain
The utility model is not used to limit the utility model.
Fig. 1 is the functional block diagram of the first embodiment of the switching device parallel current-sharing system of the utility model.Such as Fig. 1 institutes
Show, the switching device parallel current-sharing system of the utility model, including：Switching device parallel module 100 and transformer current-sharing module
200.The switching device parallel module 100 includes at least two switching devices being connected in parallel to each other.In the preferred of the utility model
May include the switching device that two or more is connected in parallel to each other in embodiment.The transformer current-sharing module 200 includes extremely
A few transformer.Preferably, the transformer includes a secondary coil and two primary coils.The wherein described transformer is equal
The input terminal setting of flow module 200 is in primary coil side, and the output end of the transformer current-sharing module 200 is arranged on secondary side
Coil side.
As shown in Figure 1, the first end of the switching device is all connected with the input terminal of the transformer current-sharing module 200, the
Two ends are grounded.Meanwhile the control terminal of the switching device is all connected with the output end of the transformer current-sharing module 200.In this way, such as
Electric current on fruit switching device is equal, and the electric current that switching device flows into the input terminal of the transformer current-sharing module 200 is equal, then
The output end of transformer current-sharing module 200 does not have output.If the electric current on switching device is unequal, switching device flows into institute
The electric current for stating the input terminal of transformer current-sharing module 200 is unequal, then the output end of transformer current-sharing module 200 will have electric current
It is output to the control terminal of two switching devices, to which the electric current of two switching devices of control is equal.
In the present embodiment, which can be any switching device of IGBT pipes and MOSFET pipes etc..The change
Depressor can be magnetic ring transformer comprising magnet ring and the punching conducting wire being set on magnet ring.Those skilled in the art know,
In other preferred embodiments of the utility model, any switching device as known in the art may be used in the switching device,
Such as switching tube constructs, and the transformer can be any current transformer.The switching device for implementing the utility model is in parallel
Current-equalizing system is forced by the way that the control terminal of parallel switching devices to be connected to the secondary coil both ends of transformer so that parallel connection is opened
The electric current for closing device is equal.Further, the switch time of switching device is equally forced to synchronize.
Fig. 2 is the circuit diagram of the second embodiment of the switching device parallel current-sharing system of the utility model.As shown in Fig. 2,
The switching device parallel current-sharing system of the utility model, including：Switching device parallel module 100 and transformer current-sharing module 200.
The switching device parallel module 100 includes the first IGBT pipes Q1 and the 2nd IGBT pipes Q2 being connected in parallel to each other.The transformer is equal
Flow module 200 includes the first transformer T1.The first transformer T1 includes the first secondary transformer L1, the first transformer
Primary side first coil L2 and first the second coil of transformer primary side L3.The gate terminal of the first IGBT pipes Q1 is connected to described
The first end A of one secondary transformer L1, the gate terminal of the 2nd IGBT pipes Q2 are connected to first transformer secondary
The second end B of coil L1.The collector of the first IGBT pipes Q1 connects the of the first transformer primary side first coil L2
One end C, the collector of the 2nd IGBT pipes Q2 connects the second end E of the second coil of the first transformer primary side L3, described
The second end of first transformer primary side first coil L2 and the first end of the second coil of the first transformer primary side L3 are connected to D
End.The emitter of the first IGBT pipes Q1 and the 2nd IGBT pipes Q2 are grounded.In the present embodiment, first transformation
The turn ratio of device primary side first coil L2 and the second coil of the first transformer primary side L3 are 1:1.
In the preferred embodiment shown in figure 2, the switching device parallel current-sharing system of the utility model further comprises connecting
The loading-diode D1 and load inductance L0 being connected between the transformer current-sharing module 200 and power supply VCC.Two poles of the load
The cathode of pipe D1 connects the power supply VCC, anode connects the ends D, and one end of the load inductance L0 connects the power supply
VCC, the other end connect the ends D.
In the preferred embodiment shown in figure 2, the switching device parallel current-sharing system of the utility model further comprises electricity
R1-R3 is hindered, resistance R1 is connected between the gate pole of the first IGBT pipes Q1 and control signal receiving end, and resistance R2 is connected to institute
It states between the gate pole of the 2nd IGBT pipes Q2 and control signal receiving end, resistance R3 is connected to the first secondary transformer L1
Second end B and the gate pole of the 2nd IGBT pipes Q2 between.
The present embodiment uses the collector current negative-feedback of the first IGBT pipes Q1 and the 2nd IGBT pipes Q2, passes through
Transformer T1 is using the collector current differential signal of the first IGBT pipes Q1 and the 2nd IGBT pipes Q2 in parallel as defeated
Go out the T gate poles that voltage introduces the first IGBT pipes Q1 and the 2nd IGBT pipes Q2, forces the first IGBT pipes in parallel
Q1 and the 2nd IGBT pipes Q2 flow.
In the present embodiment, when the electric current of the first IGBT pipes Q1 and the 2nd IGBT pipes Q2 are equal, the first transformation
Device primary side first coil L2 and first the second coil of transformer primary side L3 offset each other, the first IGBT pipes Q1 and described second
When the electric current of IGBT pipes Q2 is unequal, the first secondary transformer L1 of the first transformer T1 has voltage signal output, applies
On to the gate pole of the first IGBT pipes Q1 and the 2nd IGBT pipes Q2, the first IGBT pipes Q1 and described second is reduced
The gate voltage of that big IGBT pipe of collector current, is lifted the door of that small IGBT pipe of collector current in IGBT pipes Q2
Pole tension finally makes the electric current of the first IGBT pipes Q1 and the 2nd IGBT pipes Q2 equal.
In the preferred embodiment of the utility model, the first transformer T1 can be by magnet ring and punching conducting wire structure
At the first transformer primary side first coil L2 and first the second coil of transformer primary side L3 can be equivalent to single brake cable circle.When need
When wanting the electric current of the first IGBT pipes Q1 and the 2nd IGBT pipes Q2 equal, the first transformer primary side first coil L2 and
The turn ratio of one the second coil of transformer primary side L3 is 1:1.As needs the first IGBT pipes Q1 and the 2nd IGBT pipes Q2
Electric current it is proportional when, the first transformer primary side first coil L2 and first the second coil of transformer primary side L3 can be adjusted
Turn ratio be setting ratio.Those skilled in the art know, the first transformer T1, the first IGBT pipes Q1 and described second
IGBT pipes Q2 is merely illustrative, and the utility model can also use other kinds of switching device and current transformer.
Comparison actual measurement switching device parallel circuit is found, uneven as caused by device parameters difference, driving circuit difference to flow
Situation, can be usually reached it is 60% even more, after using the switching device parallel current-sharing system of the utility model, unevenness stream
Degree is reduced within 3%, and switch time is also forced to synchronize.
The switching device parallel current-sharing system for implementing the utility model, by the way that the control terminal of parallel switching devices to be connected to
The secondary coil both ends of transformer force to make the electric current of parallel switching devices equal, further, the switch of the utility model
Device parallel current-sharing system can be flexibly applied to the stream of various types of switching device parallel modules.Further, it switchs
The switch time of device is equally forced to synchronize.
Fig. 3 is the circuit diagram of the 3rd embodiment of the switching device parallel current-sharing system of the utility model.As shown in figure 3,
The switching device parallel current-sharing system of the utility model, including：Switching device parallel module 100 and transformer current-sharing module 200.
The switching device parallel module 100 includes the first IGBT pipes Q1, the 2nd IGBT pipes Q2, the 3rd IGBT pipes Q3 being connected in parallel to each other.
The transformer current-sharing module 200 includes the first transformer T1 and the second transformer T2.The first transformer T1 includes first
Secondary transformer L1, the first transformer primary side first coil L2 and first the second coil of transformer primary side L3.Described second
Transformer includes the second secondary transformer L1 ', the second transformer primary side first coil L2 ' and the second transformer primary side second
Coil L3 '.The gate terminal of the first IGBT pipes Q1 is connected to the first end A of the first secondary transformer L1, described
The gate terminal of 2nd IGBT pipes Q2 is connected to the second end B of the first secondary transformer L1 through resistance R3.The third
The gate terminal of IGBT pipes Q3 connects the second end B ' of the second secondary transformer L1 '.The collection of the first IGBT pipes Q1
Electrode connects the collector connection institute of the first end C, the 2nd IGBT pipes Q2 of the first transformer primary side first coil L2
State the second end E of first the second coil of transformer primary side L3.The collector of the 3rd IGBT pipes Q3 connects second transformation
The second end E ' of the second coil of device primary side L3 '.The second end of the first transformer primary side first coil L2 and described first becomes
The first end of the second coil of depressor primary side L3 is connected to the ends D, and the ends D connect the second transformer primary side first coil L2 '
First end C '.The midpoint of the first secondary transformer L1 connects the first of the second secondary transformer L1 '
Hold A '.The emitter of the first IGBT pipes Q1, the 2nd IGBT pipes Q2 and the 3rd IGBT pipes Q3 are grounded.Described
The first end and the second end of the second transformer primary side first coil L2 ' of two the second coil of transformer primary side L3 ' is connected to
D ' is held.
In preferred embodiment shown in Fig. 3, the switching device parallel current-sharing system of the utility model further comprises connecting
The loading-diode D1 and load inductance L0 being connected between the transformer current-sharing module 200 and power supply VCC.Two poles of the load
The cathode of pipe D1 connects the power supply VCC, anode connects the ends D ', and one end of the load inductance L0 connects the power supply
VCC, the other end connect the ends D '.
In preferred embodiment shown in Fig. 3, the switching device parallel current-sharing system of the utility model further comprises electricity
R1, R2 and R4 are hindered, resistance R1 is connected between the gate pole of the first IGBT pipes Q1 and control signal receiving end, resistance R2 connections
To between the gate pole and control signal receiving end of the 2nd IGBT pipes Q2, resistance R4 is connected to the door of the 3rd IGBT pipes Q3
Between pole and control signal receiving end.
In the present embodiment, the first IGBT pipes Q1, the 2nd IGBT pipes Q2 and the 3rd IGBT pipes Q3 are controlled
Mode it is approximate with embodiment illustrated in fig. 2.Introduction based on embodiment illustrated in fig. 2, those skilled in the art can realize Fig. 3 institutes
The embodiment shown, is just not repeated herein.In the embodiment shown in fig. 3, the first transformer primary side first coil L2 and
The turn ratio of the second coil of first transformer primary side L3 is 1:1；The second transformer primary side first coil L2 ' and described
The turn ratio of second the second coil of transformer primary side L3 ' is 1:2.
In the further preferred embodiment of the utility model, the switching device parallel module 100 further comprises
The first IGBT pipes Q1, the 2nd IGBT pipes Q2, the 3rd IGBT pipes Q3 and the 4th IGBT pipes Q4 ... that are connected in parallel to each other and
N IGBT pipes QN.The transformer current-sharing module 200 includes the first transformer T1, the second transformer T2 ... N-1 transformers,
Wherein N is the positive integer more than 4.In this embodiment, the first transformer primary side first coil L2 and first transformation
The turn ratio of the second coil of device primary side L3 is 1:1；The second transformer primary side first coil L2 ' and second transformer primary
The turn ratio of side the second coil L3 ' is 1:2.The N-1 transformer primary side first coil L2N and second transformer primary side
The turn ratio of second coil L3N is 1:(N-1).Based on the introduction of Fig. 2-3 illustrated embodiments, those skilled in the art can realize
Above-described embodiment is just not repeated herein.
The switching device parallel current-sharing system for implementing the utility model, by the way that the control terminal of parallel switching devices to be connected to
The secondary coil both ends of transformer force to make the electric current of parallel switching devices equal, further, the switch of the utility model
Device parallel current-sharing system can be flexibly applied to the stream of various types of switching device parallel modules.Further, it switchs
The switch time of device is equally forced to synchronize.
Fig. 4 is the circuit diagram of the fourth embodiment of the switching device parallel current-sharing system of the utility model.In the present embodiment
In, the switching device parallel current-sharing system of the utility model, including：Switching device parallel module 100 and transformer current-sharing module
200.The switching device parallel module 100 includes the first IGBT pipes Q1, the 2nd IGBT pipes Q2 that are connected in parallel to each other and each other simultaneously
The 3rd IGBT pipes Q3 and the 4th IGBT pipes Q4 of connection.The 3rd IGBT pipes Q3 being connected in parallel to each other and the 4th IGBT pipes Q4 with it is described
The first IGBT pipes Q1 and the 2nd IGBT pipes Q2 being connected in parallel to each other are connected in parallel to each other.The transformer current-sharing module 200 includes the first change
Depressor T1, the second transformer T2 and third transformer T3.The first transformer T1 includes the first secondary transformer L1, the
One transformer primary side first coil L2 and first the second coil of transformer primary side L3.Second transformer includes the second transformer
Secondary coil L1 ', the second transformer primary side first coil L2 ' and second the second coil of transformer primary side L3 '.The third transformation
Device T3 includes third secondary transformer L1 ", third transformer primary side first coil L2 " and the second line of third transformer primary side
Enclose L3 ".The gate terminal of the first IGBT pipes Q1 is connected to the first end A of the first secondary transformer L1, and described
The gate terminal of two IGBT pipes Q2 is connected to the second end B of the first secondary transformer L1 through resistance R3.Described first
The collector of IGBT pipes Q1 connects the first end C of the first transformer primary side first coil L2, the 2nd IGBT pipes Q2's
Collector connects the second end E of the second coil of the first transformer primary side L3.The first transformer primary side first coil L2
Second end and the first end of the second coil of the first transformer primary side L3 be connected to the ends D, the ends D connect the third and become
The first end C " of depressor primary side first coil L2 ".The midpoint of the first secondary transformer L1 connects the third transformation
The first end A " of device secondary coil L1 ".The gate terminal of the 3rd IGBT pipes Q3 is connected to second secondary transformer
The first end A ' of L1 ', the gate terminal of the 4th IGBT pipes Q4 are connected to the second secondary transformer L1 ' through resistance R6
Second end B '.The collector of the 3rd IGBT pipes Q3 connects the first end of the second transformer primary side first coil L2 '
The collector of C ', the 4th IGBT pipes Q4 connect the second end E ' of the second coil of the second transformer primary side L3 '.Described
The second end of two transformer primary side first coil L2 ' and the first end of the second coil of the second transformer primary side L3 ' are connected to
D ' is held, and the ends D ' connect the second end E " of the second coil of third transformer primary side L3 ".The second transformer secondary line
The midpoint of L1 ' is enclosed through the second end B " of the resistance R7 connections third secondary transformer L1 ".The first IGBT pipes Q1,
The emitter of the 2nd IGBT pipes Q2, the 3rd IGBT pipes Q3 and the 4th IGBT pipes Q4 are grounded.
In preferred embodiment shown in Fig. 4, the switching device parallel current-sharing system of the utility model further comprises electricity
R1, R2, R4 and R5 are hindered, resistance R1 is connected between the gate pole of the first IGBT pipes Q1 and control signal receiving end, resistance R2
It is connected between the gate pole of the 2nd IGBT pipes Q2 and control signal receiving end, resistance R4 is connected to the 3rd IGBT pipes Q3
Gate pole and control signal receiving end between, resistance R5 be connected to the 4th IGBT pipes Q4 gate pole and control signal receiving end
Between.
In preferred embodiment shown in Fig. 4, the switching device parallel current-sharing system of the utility model further comprises connecting
The loading-diode D1 and load inductance L0 being connected between the transformer current-sharing module 200 and power supply VCC.Two poles of the load
The cathode of pipe D1 connects the power supply VCC, anode connects the ends D ", and one end of the load inductance L0 connects the power supply
VCC, the other end connect the ends D ".
In the present embodiment, control the first IGBT pipes Q1, the 2nd IGBT pipes Q2, the 3rd IGBT pipes Q3 and
The mode of the 4th IGBT pipes Q4 is approximate with embodiment illustrated in fig. 2.Introduction based on embodiment illustrated in fig. 2, art technology
Personnel can realize embodiment shown in Fig. 4, just be not repeated herein.In the embodiment shown in fig. 4, first transformer
The turn ratio of primary side first coil L2 and the second coil of the first transformer primary side L3 are 1:1；Second transformer primary side
The turn ratio of first coil L2 ' and the second coil of the second transformer primary side L3 ' are 1:1.The third transformer primary side
The turn ratio of one coil L2 " and the second coil of third transformer primary side L3 ' is 1:1.
In the further preferred embodiment of the utility model, the switching device parallel module 100 further comprises
Multigroup switching device group being connected in parallel to each other, every group of switching device group include at least two switching devices being connected in parallel to each other.Ability
Field technique personnel can be based on embodiment shown in Fig. 2-4, construct the suitable transformer current-sharing module 200.Based on figure
The introduction of 2-3 illustrated embodiments, those skilled in the art can realize above-described embodiment, just be not repeated herein.
The switching device parallel current-sharing system for implementing the utility model, by the way that the control terminal of parallel switching devices to be connected to
The secondary coil both ends of transformer force to make the electric current of parallel switching devices equal, further, the switch of the utility model
Device parallel current-sharing system can be flexibly applied to the stream of various types of switching device parallel modules.Further, it switchs
The switch time of device is equally forced to synchronize.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (10)
1. a kind of switching device parallel current-sharing system, which is characterized in that including：Switching device parallel module and transformer flow mould
Block, the switching device parallel module include at least two switching devices being connected in parallel to each other, and the transformer current-sharing module includes
At least one transformer, the first end of the switching device are all connected with the input terminal of the transformer current-sharing module, the switch
The control terminal of device be all connected with the output end of the transformer current-sharing module with control flow through the switching device electric current it is equal,
The second end of the switching device is grounded.
2. switching device parallel current-sharing system according to claim 1, which is characterized in that the switching device parallel module
Including the first switch device being connected in parallel to each other and second switch device, the transformer current-sharing module includes the first transformer, institute
It includes the first secondary transformer, the first transformer primary side first coil and the first transformer primary side second to state the first transformer
Coil, the control terminal of the first switch device are connected to the first end of first secondary transformer, and described second opens
The control terminal for closing device is connected to the second end of first secondary transformer, and the first end of the first switch device connects
The first end of the first transformer primary side first coil is connect, the first end of the second switch device connects first transformation
The second end of the second coil of device primary side, the second end of the first transformer primary side first coil and first transformer primary side
The first end of second coil is connected, and the second end of the first switch device and the second switch device is grounded.
3. switching device parallel current-sharing system according to claim 2, which is characterized in that first transformer primary side
The turn ratio of one coil and second coil of the first transformer primary side is 1:1.
4. switching device parallel current-sharing system according to claim 2, which is characterized in that the switching device parallel module
Further comprise that the third switching device in parallel with the first switch device and the second switch device, the transformer are equal
Flow module includes the second transformer, and second transformer includes the second secondary transformer, the second transformer primary side first
The midpoint of coil and second the second coil of transformer primary side, first secondary transformer connects second transformer primary
The first end of side first coil, the control terminal of the third switching device connect the second of second secondary transformer
End, the first end of the third switching device connect the second end of second coil of the second transformer primary side, and described second becomes
The first end of the second coil of depressor primary side connects the second end of the second transformer primary side first coil, second transformer
The first end of primary side first coil connects the second end of the first transformer primary side first coil and first transformer
The first end of the second coil of primary side, the second end ground connection of the third switching device.
5. switching device parallel current-sharing system according to claim 4, which is characterized in that first transformer primary side
The turn ratio of one coil and second coil of the first transformer primary side is 1:1；The second transformer primary side first coil and
The turn ratio of second transformer primary side, second coil is 1:2.
6. switching device parallel current-sharing system according to claim 4, which is characterized in that the switching device parallel module
Further comprise fourth-the N switching device in parallel with the first switch device and the second switch device, the transformation
Device current-sharing module includes third transformer the-the N-1 transformers, and wherein N is the positive integer more than 4.
7. switching device parallel current-sharing system according to claim 2, which is characterized in that the switching device parallel module
Further comprise that the third switching device being connected in parallel to each other and the 4th switching device, the transformer current-sharing module include the second transformation
Device and third transformer, the third switching device being connected in parallel to each other and the 4th switching device are opened with first to be connected in parallel to each other
It closes device and second switch device is connected in parallel to each other, second transformer includes the second secondary transformer, the second transformer
Primary side first coil and second the second coil of transformer primary side, the third transformer include third secondary transformer,
The second coil of three transformer primary side first coils and third transformer primary side, the control terminal of the third switching device are connected to institute
The first end of the second secondary transformer is stated, the control terminal of the 4th switching device is connected to second transformer secondary
The second end of coil, the first end of the third switching device connect the first end of the second transformer primary side first coil,
The first end of 4th switching device connects the second end of second coil of the second transformer primary side, second transformer
The second end of primary side first coil is connected with the first end of second coil of the second transformer primary side, the third switching device
It is grounded with the second end of the 4th switching device；The midpoint of first secondary transformer connects the third transformation
The first end of device secondary coil, second secondary transformer midpoint connect the of the third secondary transformer
The first end at two ends, the second end of the first transformer primary side first coil and second coil of the first transformer primary side connects
Connect the first end of the third transformer primary side first coil, the second end of the second transformer primary side first coil and described
The first end of second the second coil of transformer primary side connects the second end of second coil of third transformer primary side, the third
The first end of the second coil of transformer primary side connects the second end of the third transformer primary side first coil.
8. switching device parallel current-sharing system according to claim 7, which is characterized in that first transformer primary side
The turn ratio of one coil and second coil of the first transformer primary side is 1:1；The second transformer primary side first coil and
The turn ratio of second transformer primary side, second coil is 1:1；The third transformer primary side first coil and the third
The turn ratio of the second coil of transformer primary side is 1:1.
9. switching device parallel current-sharing system according to claim 1, which is characterized in that further comprise being connected to described
The cathode of loading-diode between transformer current-sharing module and power supply and load inductance, the loading-diode connects the electricity
Source, anode connect the input terminal of the transformer current-sharing module, and one end of the load inductance connects the power supply, and the other end connects
Connect the input terminal of the transformer current-sharing module.
10. the switching device parallel current-sharing system according to any one of claim 1-9, which is characterized in that described to open
It includes IGBT pipes and MOSFET pipes to close device, and the transformer is magnetic ring transformer.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201820394756.2U CN207926432U (en) | 2018-03-22 | 2018-03-22 | A kind of switching device parallel current-sharing system |
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| CN201820394756.2U CN207926432U (en) | 2018-03-22 | 2018-03-22 | A kind of switching device parallel current-sharing system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299825A (en) * | 2018-03-22 | 2019-10-01 | 维谛技术有限公司 | A kind of switching device parallel current-sharing system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110299825A (en) * | 2018-03-22 | 2019-10-01 | 维谛技术有限公司 | A kind of switching device parallel current-sharing system |
| CN110299825B (en) * | 2018-03-22 | 2024-03-08 | 维谛技术有限公司 | Parallel current equalizing system for switching devices |
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