CN109980956A - A kind of DC power supply - Google Patents
A kind of DC power supply Download PDFInfo
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- CN109980956A CN109980956A CN201910242595.4A CN201910242595A CN109980956A CN 109980956 A CN109980956 A CN 109980956A CN 201910242595 A CN201910242595 A CN 201910242595A CN 109980956 A CN109980956 A CN 109980956A
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- Prior art keywords
- bridge arm
- module
- power
- power supply
- load
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1584—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load with a plurality of power processing stages connected in parallel
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2089—Modifications to facilitate cooling, ventilating, or heating for power electronics, e.g. for inverters for controlling motor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Dc-Dc Converters (AREA)
Abstract
The embodiment of the present invention provides a kind of DC power supply, including rectification circuit and dc power translation circuit；Wherein, for connecting with the first power supply/load, the output end of rectification circuit is connect as DC bus with the input terminal of dc power translation circuit the input terminal of rectification circuit, realizes the transformation of AC-DC bidirectional electric energy；Wherein dc power translation circuit realizes the transformation of DC-DC bidirectional electric energy, including multiple bridge arm modules and several substrates, and each switching device in each bridge arm module is based on corresponding driving signal and is switched on or off；The both ends of each bridge arm module with DC bus for connecting, and the output end of each bridge arm module with second source/load for connecting；The bridge arm module of all output end parallel connections is integrated on the same substrate.DC power supply provided in an embodiment of the present invention can improve the flexible expansion of DC power source capacity while preferable equal properties of flow between guaranteeing bridge arm module in parallel by adjusting the quantity of bridge arm module in parallel.
Description
Technical field
The present embodiments relate to power electronics field more particularly to a kind of DC power supplies.
Background technique
With the promotion and popularization of new energy concept, the new energy equipment such as mobile terminal, electric car, energy-accumulating power station is constantly pushed away
It is old new out.It is portability, cruising ability and the storage for determining new energy equipment as the power battery of new energy important component
The key factor of energy capacity, electrical characteristic play a crucial role new energy equipment.
In order to guarantee the reliability service of power battery, need to carry out electrical core of power battery comprehensively, effectively to test.It is first
First, the test power supply of electrical core of power battery will have low-voltage, high-current characteristic.Secondly, being directed to the battery core of different capabilities size, survey
Examination power supply need to have different output-current rating abilities.Further, it is contemplated that the limit application of power battery, especially such as battery
Short circuit, quick charge or electric discharge etc. are related to the test of the battery borderline properties of battery security, it is desirable that test power supply has electric current
Two-way, high dynamic, high-precision output control ability.
Current test power supply is to meet battery core testing requirement, and majority uses the switching device based on conventional low current capacity
Direct parallel connection simultaneously cooperates control strategy appropriate to realize the technical solution of stable state and dynamic characteristic.In above scheme, parallel connection is opened
The equal properties of flow for closing device depends entirely on device parameters, circuit stray parameter and driving circuit characteristic, and each switching device
Port voltage, electric current can not be measured directly, largely reduce the controllability of test power supply.
Summary of the invention
The embodiment of the present invention provides a kind of DC power supply, and to solve, the equal properties of flow of existing test power supply is poor, controllability
The problem of low, poor expandability.
The embodiment of the present invention provides a kind of DC power supply, including rectification circuit and dc power translation circuit；
Wherein, the input terminal of the rectification circuit with the first power supply/load for connecting, the output end of the rectification circuit
It is connect as DC bus with the input terminal of the dc power translation circuit, the rectification circuit realizes that AC-DC is two-way
Transformation of electrical energy；
The dc power translation circuit realizes the transformation of DC-DC bidirectional electric energy, including multiple bridge arm modules and several
A substrate, each switching device in each bridge arm module are based on corresponding driving signal and are switched on or off；Each institute
The both ends of bridge arm module are stated for connecting with the DC bus, the output end of each bridge arm module is used for and the second electricity
Source/load connection；The bridge arm module of all output end parallel connections is integrated on the same substrate.
The bridge arm module of all output end parallel connections is integrated in same base by a kind of DC power supply provided in an embodiment of the present invention
On plate, it can guarantee the switching device temperature equalization for including in each bridge arm module, the external factor such as commutation circuit area phase as far as possible
Together, optimize the equal properties of flow between bridge arm module in parallel.Each bridge arm module has independence, for single bridge arm module, the bridge arm
The output electric current of the port voltage of each switching device and bridge arm module can also carry out independent measurement in module, enhance direct current
The controllability of power conversion circuit.Furthermore, it is only necessary to adjust the number for the bridge arm module in parallel for including in dc power translation circuit
Amount just can satisfy different power power-supply capacity requirements, and structure expansibility is strong, flexibility ratio is high.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is this hair
Bright some embodiments for those of ordinary skill in the art without creative efforts, can be with root
Remaining attached drawing is obtained according to these attached drawings.
Fig. 1 is the structural schematic diagram of DC power supply provided in an embodiment of the present invention；
Fig. 2 is the structural schematic diagram of dc power translation circuit provided in an embodiment of the present invention；
Fig. 3 be another embodiment of the present invention provides dc power translation circuit structural schematic diagram；
Fig. 4 is the structural schematic diagram of bridge arm module provided in an embodiment of the present invention；
Fig. 5 is the structural schematic diagram of the substrate provided in an embodiment of the present invention for integrating multiple bridge arm modules；
Fig. 6 is the structural schematic diagram of the substrate provided in an embodiment of the present invention for being equipped with radiating module；
Fig. 7 is the structural schematic diagram for the dc power translation circuit that further embodiment of this invention provides；
Fig. 8 be another embodiment of the present invention provides DC power supply structural schematic diagram；
Fig. 9 is the structural schematic diagram for the DC power supply that further embodiment of this invention provides；
Figure 10 is the structural schematic diagram for the DC power supply that yet another embodiment of the invention provides；
Description of symbols:
1- bridge arm module；1a- first port；1b- second port；
1c- output end；11- power bridge arm；12- DC support capacitor；
13- drive module；14- filter inductance；15- filter capacitor；
16- DC bus；The first power supply of 21-/load；22- second source/load；
3- substrate；4- rectification circuit；5- dc power translation circuit；
61- first switch；62- second switch；7- control module；
8- detection module；9- filter capacitor；10- radiating module.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, those of ordinary skill in the art
Remaining all embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
Based on dc power translation circuit constructed by multiple low capacity switching devices technical solution directly in parallel, switch
The equal properties of flow of device depends entirely on device parameters, circuit stray parameter and driving circuit characteristic, and equal properties of flow is poor, controllability
It is low.To solve the above-mentioned problems, the embodiment of the invention provides a kind of dc power translation circuits, are the survey of electrical core of power battery
Examination, which provides, flows the test power supply that feature is good, controllability is strong.It should be noted that DC power supply provided in an embodiment of the present invention is not
It can only be used to test power supply, can be also used for the application fields such as intelligent terminal, electric car, energy-accumulating power station.Fig. 1 is that the present invention is real
The structural schematic diagram of the DC power supply of example offer is applied, as shown in Figure 1, the DC power supply includes that rectification circuit 4 and dc power become
Change circuit 5；Wherein, the input terminal of rectification circuit 4 with the first power supply/load 21 for connecting, the output end conduct of rectification circuit 4
DC bus 16 is connect with the input terminal of dc power translation circuit 5, and rectification circuit is for realizing the change of AC-DC bidirectional electric energy
It changes；Dc power translation circuit 5 realizes the transformation of DC-DC bidirectional electric energy, including multiple bridge arm modules 1 and several substrates 3,
Each switching device in each bridge arm module 1 is based on corresponding driving signal and is switched on or off；The two of each bridge arm module 1
End with DC bus 16 for connecting, and the output end 1c of each bridge arm module 1 with second source/load 22 for connecting；It is all
The bridge arm module 1 of output end 1c parallel connection is integrated on the same substrate 3.
Specifically, in DC power supply, the first power supply/load 21 is AC power source, the first power supply/load 21 and rectification circuit
4 connections, the alternating current that rectification circuit 4 export the first power supply/load 21 rectifies, and will rectify obtained direct current as
The DC bus of dc power translation circuit 5.Dc power translation circuit 5 carries out direct current-to the direct current that rectification circuit 4 inputs
DC converting, output direct current to second source/load 22.In addition, there is also the feelings that the first power supply/load 21 is AC load
Condition, dc power translation circuit 5 carry out DC-dc conversion to the direct current that second source/load 22 inputs, export direct current
And it is input to rectification circuit 4.Rectification circuit 4 can carry out inversion to the direct current inversely inputted, be converted to alternating current and export
To the first power supply/load 21.For example, the first power supply/load 21 is alternating current 220V or 380V alternating current.Rectification circuit 4 is based on bridge-type
The convert alternating current of input is low-voltage DC, provided directly for rear class dc power translation circuit 5 by high-frequency synchronous rectifier system
Busbar voltage is flowed, the low-voltage DC pressure regulation on DC bus 16 is transformed into second source/load by dc power translation circuit 5
Direct current needed for 22.Meanwhile dc power translation circuit 5 can also shift to the direct current contravariant of second source/load 22
The low-voltage DC inversion of DC bus 16 is the alternating current of the first power supply/load 21 by DC bus 16, rectification circuit 4 again.
Rectification circuit 4 can be individually encapsulated into module.
Wherein, dc power translation circuit 5 include multiple bridge arm modules 1, herein each bridge arm module 1 be one can
Independently operated power conversion modules, and include multiple switch device in bridge arm module 1, each switching device can be in correspondence
Driving signal control under realize on or off.It is herein that the both ends of bridge arm module 1 are known as first port convenient for distinguishing
1a and second port 1b.Herein, switching device can be the insulated gate bipolar transistor based on Si base, SiC base or GaN base
(Insulated Gate Bipolar Transistor, IGBT), metal oxide semiconductor field effect tube (Metal-
Oxide-Semiconductor Field-Effect Transistor, MOSFET), junction field effect transistor (Junction
Field-Effect Transistor, JFET) etc. transistors and diode, the present invention is not especially limit this.By
Have independence in each bridge arm module 1, is then directed to single bridge arm module 1, the port electricity of each switching device in the bridge arm module 1
Pressure and electric current can also carry out direct, independent measurement.
DC bus 16 and second source/load 22 can be connected to the both ends of dc power translation circuit 5, direct current
Power conversion circuit 5 can be realized the transformation of the bidirectional electric energy between DC bus 16 and second source/load 22, can be by direct current
Bus 16 as input power, second source/load 22 as load, realize electric energy from DC bus 16 to second source/it is negative
Carry 22 transformation；Or it is used as load, second source/load 22 to be used as power supply DC bus 16, realize electric energy from the second electricity
The transformation of DC bus 16 is arrived in source/load 22.It should be noted that second source/load 22 can be one or more power supplys
And load, i.e., in dc power translation circuit 5, different bridge arm modules 1 can connect from different second source/loads 22
It connects, to realize the power conversion between different second source/load 22 and DC bus 16.Further, each bridge arm
The both ends of module 1, i.e. first port 1a and second port 1b with the both ends of DC bus 16 for connecting, each bridge arm module 1
Output end 1c for being connect with one end of second source/load 22.Bridge arm module 1 output end 1c and second source/it is negative
When carrying 22 connection, the bridge arm module 1 that will can need to connect with same second source/load 22 in dc power translation circuit 5
Two parts are equally divided into, are connect after the output end 1c of a part of bridge arm module 1 is in parallel with one end of second source/load 22, separately
It is connect after the output end 1c of a part of bridge arm module 1 is in parallel with the other end of same second source/load 22, it can also be by direct current
All bridge arm modules 1 for needing to connect with second source/load 22 in power conversion circuit 5 as a whole, by all bridges
It is connect after the output end 1c of arm module 1 is in parallel with one end of second source/load 22, by the first port of all bridge arm modules 1
It is connect after 1a or second port 1b are in parallel with the other end of second source/load 22, the embodiment of the present invention does not limit this specifically
It is fixed.
In dc power translation circuit 5, bridge arm module 1 is integrated on the substrate 3, and each bridge arm integrated on substrate 3
Mutually indepedent between module 1, no electrical connection helps to adjust dc power in real time according to different power power-supply capacity requirements
The quantity for the bridge arm module 1 for including in translation circuit 5, so that the dilatation of dc power translation circuit 5 is more flexible.In order to
Optimize the equal properties of flow of dc power translation circuit, substrate 3 can use the preferable material of thermal conductivity, such as aluminum substrate or copper-based
Plate plays good conduction of heat while providing physical support and local conducting wire for bridge arm module 1, to guarantee
The switching device temperature equalization for including in each bridge arm module 1 integrated on same substrate 3, the external factor such as commutation circuit area
It is identical as far as possible, to realize that preferable parallel branch stream creates conditions.
In order to advanced optimize the equal properties of flow of dc power translation circuit 5, need to guarantee all output end 1c parallel connections
Bridge arm module 1 is integrated on same substrate 3, so that the switching device temperature equalization for including in above-mentioned two bridge arm module 1, is changed
It is identical as far as possible to flow the external factor such as loop area.It should be noted that regarding the bridge arm module 1 of all output end 1c parallel connections as one
Bridge arm module in parallel is organized, each bridge arm module 1 in one group of parallel connection bridge arm module needs to be integrated on same substrate 3, Ren Yiji
Multiple groups parallel connection bridge arm module can be integrated on plate 3 simultaneously.
In DC power supply provided in an embodiment of the present invention, the bridge arm module of all output end parallel connections is integrated in same substrate
On, it can guarantee the switching device temperature equalization for including in each bridge arm module, the external factor such as commutation circuit area are identical as far as possible,
Optimize the equal properties of flow between bridge arm module in parallel.Each bridge arm module has independence, for single bridge arm module, the bridge arm module
In each switching device port voltage and electric current can also carry out independent measurement, enhance the controllable of dc power translation circuit
Property.Furthermore, it is only necessary to adjust the bridge arm module in parallel for including in dc power translation circuit quantity just can satisfy it is different
Power power-supply capacity requirement, structure expansibility is strong, flexibility ratio is high.
Based on the above embodiment, Fig. 2 is the structural schematic diagram of dc power translation circuit provided in an embodiment of the present invention, such as
Shown in Fig. 2, in the dc power translation circuit, after the output end 1c of a part of bridge arm module 1 is in parallel with second source/load 22
One end connection, connect after the output end 1c of another part bridge arm module 1 is in parallel with the other end of second source/load 22；One
Part bridge arm module 1 is integrated on any substrate 3, and another part bridge arm module 1 is integrated in the substrate 3 or another substrate 3
On.
Specifically, the bridge arm module 1 in the dc power translation circuit is equally divided into two parts, i.e. two groups of parallel connection bridge arms
Module.It will connect, make with the both ends of second source/load 22 after the output end 1c of above-mentioned two groups of parallel connection bridge arm modules respectively parallel connection
For a kind of parallel way of each bridge arm module 1.Two groups of parallel connection bridge arm modules can integrate on same substrate 3, can also divide
It is not integrated on two substrates 3.For example, the dc power translation circuit in Fig. 2 includes two substrates 3, integrated on each substrate 3
There is one group of parallel connection bridge arm module.
Based on any of the above-described embodiment, Fig. 3 be another embodiment of the present invention provides dc power translation circuit structure
Schematic diagram, as shown in figure 3, electric with second after the output end 1c of all bridge arm modules 1 in dc power translation circuit is in parallel
One end of source/load 22 connects, and connect after one end of all bridge arm modules 1 is in parallel with the other end of second source/load 22；Often
One bridge arm module 1 is integrated on same substrate 3.
Specifically, whole bridge arm modules 1 in dc power translation circuit are regard as one group of parallel connection bridge arm module, whole bridges
It is connect after the output end 1c of arm module 1 is in parallel with one end of second source/load 22, and by the first end of whole bridge arm modules 1
It is connect after mouth 1a or second port 1b are in parallel with the other end of second source/load 22, the another kind as each bridge arm module 1
Parallel way.Whole bridge arm modules 1 in dc power translation circuit based on above-mentioned parallel way are integrated in same substrate 3
On.In Fig. 3, the second port 1b of each bridge arm module 1 simultaneously with one end of DC bus 16 and second source/load 22 one
End connection.Further, it is also possible to be the first port 1a while and DC bus of whole bridge arm modules 1 in dc power translation circuit
16 one end is connected with one end of second source/load 22, and the present invention is not especially limit this.
Fig. 2 and Fig. 3 provides two kinds of bridge arm module output-parallel modes, and provides correspondence for different parallel ways
Bridge arm module 1 integration mode, by the way that each bridge arm module 1 in one group of parallel connection bridge arm module is integrated in same substrate 3
On, optimize the equal properties of flow of bridge arm module in parallel.Dc power translation circuit not only can be by changing bridge arm module as a result,
1 quantity realizes being adjusted flexibly for current capacity, can also be realized not by changing the output-parallel mode of bridge arm module 1
With the adjustment of output mode, the flexibility of DC power supply is further increased.
For example, when output current capacity demand is big, the whole that will be integrated on substrate each in dc power translation circuit
Bridge arm module is as one group of parallel connection bridge arm module, using the output end of two groups of parallel connection bridge arm modules as dc power translation circuit
Two output ports, i.e. dc power translation circuit include two-layer substrate.When output current capacity demand is small, each substrate pair
One group of dc power translation circuit is answered, the bridge arm module integrated on each substrate is equally divided into two groups of parallel connection bridge arm modules, respectively
Parallel connection forms two output ports of dc power translation circuit.
Based on any of the above-described embodiment, Fig. 4 is the structural schematic diagram of bridge arm module provided in an embodiment of the present invention, such as Fig. 4
Shown, in DC power supply, bridge arm module includes power bridge arm 11, and bridge arm module further includes DC support capacitor 12, drive module
At least one of 13 and filter inductance 14；Wherein, DC support capacitor 12 is in parallel with power bridge arm 11；Drive module 13 and function
The driving end of each switching device in rate bridge arm 11 connects, and drive module 13 is used to provide corresponding drive for each switching device
Dynamic signal；Filter inductance 14 is connected between the output end 1c of power bridge arm 11 and second source/load 22, is used for smooth power
Bridge arm current.
It specifically, include the power bridge arm 11 for realizing power conversion for any bridge arm module, in bridge arm module,
Power bridge arm 11 includes multiple switch device, and each switching device can realize conducting under the control of corresponding driving signal
Or shutdown.Power bridge arm 11 can be half-bridge bridge arm, can also be active output terminal clamper bridge arm, output end clamper bridge arm, flies
Across capacitor bridge arm or T-type bridge arm, the present invention is not especially limit this.
In addition, further include DC support capacitor 12 in bridge arm module, DC support capacitor 12 can be by single capacitor or more
A discrete capacitor, capacitance group parallel connection are constituted, and the both ends of DC support capacitor 12 are respectively connected to the both ends of power bridge arm 11, with function
Rate bridge arm 11 is in parallel, and DC support capacitor 12 is for filtering and energy storage.
Bridge arm module further includes drive module 13, the driving of each switching device in drive module 13 and power bridge arm 11
End connection, by externally input control signal isolation, is converted to power signal, i.e. driving signal, to drive corresponding switch
Device.It should be noted that each switching device corresponding isolation, independent driving signal all the way in power bridge arm 11.
Bridge arm module further includes filter inductance 14, and filter inductance 14 is connected to the electricity of output end 1c and second of power bridge arm 11
Between source/load 22.There are in the case where filter inductance 14 in bridge arm module, 14 one end of filter inductance and power bridge arm 11
Midpoint connection, the other end is the output end 1c of bridge arm module, is connect with second source/load 22.Filter inductance 14 can be
Discrete inductance is also possible to a branch inductance of coupling inductance, and the present invention is not especially limit this.In addition, bridge
Arm module can also not include filter inductance 14, but the corresponding coupling inductance of each bridge arm module is independently arranged outside substrate 3
Branch inductance improve the power density of bridge arm module or even substrate 3 to reduce the volume of bridge arm module.
For example, Fig. 5 is the structural schematic diagram of the substrate provided in an embodiment of the present invention for integrating multiple bridge arm modules, such as Fig. 5
It is shown, 6 bridge arm modules 1 are integrated on substrate 3.Region shown in chain-dotted line box is any bridge arm module 1, including the
Single port 1a, second port 1b, output end 1c and power bridge arm 11, DC support capacitor 12.The area that power bridge arm 11 is arranged
In domain, it is additionally provided with drive module.The corresponding filter inductance of bridge arm module is arranged outside substrate.
Based on any of the above-described embodiment, DC power supply further includes detection module and control module；Wherein, detection module includes
Sensing device and conditioning circuit, sensing device for measure the first power supply/load, DC bus, bridge arm module and second source/
The electric parameter of at least one of load obtains detection limit；Conditioning circuit is used to improve detection limit, and will be after conditioning
Detection limit is transmitted to control module；Control module is used for based on the detection limit and each bridge of power conversion demand output after conditioning
The control signal of each switching device in arm module, and control signal is transmitted to the driving mould in corresponding bridge arm module
Block, so that drive module can generate driving signal, the turn-on and turn-off of control switch device based on control signal.
Specifically, sensing device can be voltage sensor, current sensor etc. for measure the first power supply/load, directly
The equipment of the electric parameter of at least one of bus, bridge arm module and second source/load is flowed, electric parameter can be input electricity
Pressure, input current, output voltage, output electric current and mid-stage voltage and electric current etc..Sensing device obtains above-mentioned electricity in measurement
After the detection limit of gas parameter, the amount of will test is transmitted to conditioning circuit, and conditioning circuit is after improving detection limit, after conditioning
Detection limit be transmitted to control module.Control module can be according to the detection limit and power conversion demand after conditioning, to direct current
Power conversion circuit carries out closed-loop control, generates the corresponding control signal of each switching device in each bridge arm module, and will
The corresponding control signal of each bridge arm module is sent to the drive module in the bridge arm module included.Drive module is receiving control
After the control signal that molding block provides, to control signal isolation, power signal, i.e. driving signal are converted to, to drive correspondence
Switching device.Herein, power conversion demand can be output voltage current precision, dynamic response characteristic and transformation of electrical energy side
To etc. indexs.
Based on any of the above-described embodiment, control module is synchronously control letter for the control signal of each bridge arm module output
Number or phase-shifted control signal.
Specifically, control module can be realized on the basis of detection module and drive module and convert electricity to dc power
The control for the power quality that effective control of switching device and dc power translation circuit export in each bridge arm module in road.
Further, control module can use the same control signal of stringent synchronization to the switching device in each bridge arm module, i.e., together
Step control signal is controlled, so that each bridge arm module carries out transformation of electrical energy with identical working method, to obtain preferably simultaneously
Connection branch flows effect；Control module can also be controlled the switching device in each bridge arm module using phase-shifted control signal
System, such as the control signal of any bridge arm module switching device can be passed through by the control signal of another bridge arm module switching device
Certain delay obtains, and the switching device control signal of adjacent bridge arm module successively has specific phase difference, each parallel connection
Bridge arm module carries out transformation of electrical energy with staggered working method, to realize that output harmonic wave is offset and high fault redundance controls.
In addition, can also include accessory power supply in DC power supply, accessory power supply be used for as rectification circuit and DC converting electricity
Drive module, detection module and control module power supply in road.
Based on any of the above-described embodiment, Fig. 6 is the structure of the substrate provided in an embodiment of the present invention for being equipped with radiating module
Schematic diagram, as shown in fig. 6, DC power supply further includes radiating module 10, radiating module 10 is closely mounted on each 3 back side of substrate.
Specifically, 3 back side of substrate refers to that substrate 3 is integrated with the back side of the one side of bridge arm module.Substrate 3 is for bridge arm module
While physical support and local conducting wire are provided, good conduction of heat is played, the heat that switching device is generated passes
It leads on radiating module 10, radiating module 10 distributes heat in environment again.In addition, in 3 back side of substrate and radiating module 10
Between uniformly add the heat-conducting medium of high thermal conductivity coefficient and can eliminate substrate 3 and radiating module 10 such as heat-conducting silicone grease or thermally conductive rubber mat
Contact gap between veneer.
According to loss amount of heat, radiating module can be used it is natural air cooled, can also using forced air cooling, heat pipe heat radiation or
Person's water cooling etc..Wherein, it is to utilize the cooling radiating module of natural air that radiating module is natural air cooled.Radiating module forced air cooling, then
Fan need to be installed in radiating module side, blowing or air draught are realized to radiating module surface, accelerate radiating mould using convection action
The cooling of block.Heat pipe heat radiation is that the heat on radiating module is passed through hot pipe conducting to DC power supply shell or other radiating surfaces
Upper realization heat distributes.Radiating module water cooling then need to tighten closely connected dress water cooling plant in radiating module, utilize radiating module and water
Heat transfer between device for cooling takes away heat by cooling water.
DC power supply provided in an embodiment of the present invention, by mount radiating module, ensure that on same substrate integrate and
Join the environment temperature of bridge arm module equilibrium, in favor of sharing control.
Based on any of the above-described embodiment, DC power supply further includes filter capacitor, and filter capacitor and second source/load are simultaneously
Connection.It specifically, can be effectively smooth defeated in dc power translation circuit and the second source/load connecting pin parallel filtering capacitor
Voltage out improves output power quality.
Fig. 7 is the structural schematic diagram for the dc power translation circuit that further embodiment of this invention provides, as shown in fig. 7, should
It include multiple bridge arm modules 1 in dc power translation circuit, each bridge arm module 1 includes DC support capacitor 12 and power bridge arm
11, power bridge arm 11 is half-bridge bridge arm herein, and each bridge arm module 1 is correspondingly arranged on the defeated of filter inductance 14 and half-bridge bridge arm
Outlet 1c connection.The output end 1c of two parts bridge arm module 1 in the dc power translation circuit connects with filter inductance 14 respectively
Rear in parallel two output ports for forming dc power translation circuit are connect, between two output ports of dc power translation circuit
Parallel filtering capacitor 15.
Based on any of the above-described embodiment, which further includes first switch and/or second switch；First switch setting
In the first power supply/between load and rectification circuit, second switch is arranged between filter capacitor and second source/load.First
Switch is for controlling the on-off being electrically connected between DC power supply and the first power supply/load, and second switch is for controlling direct current
The on-off being electrically connected between source and second source/load.
For example, Fig. 8 be another embodiment of the present invention provides DC power supply structural schematic diagram, as shown in figure 8, direct current
In source, first switch 61, dc power translation circuit 5 and the second electricity are provided between the first power supply/load 21 and rectification circuit 4
Second switch 62 is provided between source/load 22.Voltage sensor is parallel between rectification circuit 4 and dc power translation circuit 5
Device is parallel with voltage biography for acquiring DC bus-bar voltage between dc power translation circuit 5 and second source/load 22
Induction device is connected for acquiring output voltage, and on the circuit between dc power translation circuit 5 and second source/load 22
There is current sensor device, for acquiring output electric current.Above-mentioned DC bus-bar voltage, output voltage and output electric current are after conditioning
It is transmitted to control module, control module is used to export dc power translation circuit 5 based on above-mentioned parameter and power conversion demand
In each switching device in each bridge arm module control signal, dc power translation circuit 5 is controlled.
Fig. 9 is the structural schematic diagram for the DC power supply that further embodiment of this invention provides, as shown in figure 9, DC power supply
6 bridge arm modules 1 are integrated on substrate 3, the first port 1a and second port 1b of each bridge arm module 1 connect positive and negative direct current mother
The both ends of line 16.One end of filter inductance on substrate 3 in every 3 bridge arm modules 1 is parallel with one another as output end, constitutes two groups
Bridge arm module in parallel.Filter capacitor 9 is connected across on the output end of two groups of parallel connection bridge arm modules, and the output end of bridge arm module in parallel
Also it is connect respectively with detection module 8 and second switch 62.Each substrate 3 and its corresponding filter inductance 14, filter capacitor 9, inspection
It surveys module 8 and second switch 62 forms a power channels, connect a second source/load 22.Entire DC power supply can wrap
Containing multiple power channels.
Figure 10 is the structural schematic diagram for the DC power supply that yet another embodiment of the invention provides, as shown in Figure 10, each substrate 3
On be integrated with 6 bridge arm modules 1, the first port 1a and second port 1b of all bridge arm modules 1 are separately connected positive and negative direct current mother
The one end at the both ends of line 16, the filter inductance in all bridge arm modules 1 is parallel with one another as output end, constitutes one group of parallel connection bridge arm
Module.Parallel filtering capacitor 9 between the output end of two groups of parallel connection bridge arm modules corresponding to two substrates 3, and bridge arm mould in parallel
The output end of block is also connect with detection module 8 and second switch 62 respectively.Two substrates 3 and its corresponding filter inductance 14, filter
Wave capacitor 9, detection module 8 and second switch 62 form a power channels, connect a second source/load 22.
Based on any of the above-described embodiment, which further includes cabinet, and rectification circuit and dc power translation circuit are set
It sets in box house；The opposite surface of any two of cabinet can be respectively arranged with tunnel inlet and ducting outlet.
Specifically, tunnel inlet and ducting outlet are respectively set by the opposite surface of any two in cabinet, so that
Since the heat that power conversion generates can quickly shed cabinet in cabinet, rectification circuit and dc power transformation in guard box body
The stable operation of circuit.
Based on any of the above-described embodiment, a kind of DC power supply, using AC-DC and DC-DC two-stage transformation of electrical energy.
Wherein, AC-DC converter, i.e. rectification circuit realize alternating current between low-voltage direct busbar voltage using bridge-type high-frequency rectification
Bidirectional electric energy transformation.DC-dc conversion, i.e. dc power translation circuit use more bridge arm module parallel-connection structures, are realizing
It is in parallel by multiple bridge arm modules while bidirectional electric energy converts between DC bus-bar voltage and load voltage, it realizes different defeated
The accurate control of electric current out.Multiple independent, parallel bridge arm modules are integrated on the same substrate, to obtain preferable stream effect
Fruit.Accessory power supply provides auxiliary DC power supply for entire design.Control module for realizing target instruction target word voltage and current change
Change control.The detection of detection module realization electric parameter.Further, control module can also include control panel, control plane
Plate is calculated based on control instruction and electric parameter closed loop for receiving the control instruction issued and generates each bridge arm module derailing switch
The control signal of part, to obtain target voltage and electric current in outlet side.It is opened in addition, control module can be also used for control first
Pass and second switch.
DC power supply design uses box typed structure, and cabinet front includes state instruction, operation interface and tunnel inlet；
The back side is ducting outlet；Four sides are sealing surface.Box house left and right sides is respectively rectification circuit and accessory power supply, control mould
The auxiliary circuits such as block and detection module, middle part are dc power translation circuit.Dc power translation circuit uses more power channels
Parallel stepped construction, each power channels include to be integrated with substrate, filter inductance, filter capacitor and the radiating mould of more bridge arm modules
Block.Each power channels form DC power supply all the way and export.
DC power supply provided in an embodiment of the present invention, the bridge arm that output ends all in dc power translation circuit are in parallel
Module is integrated on the same substrate, can guarantee the switching device temperature equalization for including in each bridge arm module, commutation circuit area
Etc. external factor it is identical as far as possible, optimize dc power translation circuit equal properties of flow.And each bridge arm module has independence, then needle
To single bridge arm module, the port voltage of each switching device and electric current can also carry out independent measurement in the bridge arm module, increase
The strong controllability of dc power translation circuit.Furthermore, it is only necessary to adjust the bridge arm in parallel for including in dc power translation circuit
The quantity of module just can satisfy different power power-supply capacity requirements, and structure expansibility is strong, flexibility ratio is high.
Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (10)
1. a kind of DC power supply, which is characterized in that including rectification circuit and dc power translation circuit；
Wherein, the input terminal of the rectification circuit with the first power supply/load for connecting, the output end conduct of the rectification circuit
DC bus is connect with the input terminal of the dc power translation circuit, and the rectification circuit realizes AC-DC bidirectional electric energy
Transformation；
The dc power translation circuit realizes the transformation of DC-DC bidirectional electric energy, including multiple bridge arm modules and several bases
Plate, each switching device in each bridge arm module are based on corresponding driving signal and are switched on or off；Each bridge
For connect with the DC bus, the output end of each bridge arm module is used for and second source/bear at the both ends of arm module
Carry connection；The bridge arm module of all output end parallel connections is integrated on the same substrate.
2. DC power supply according to claim 1, which is characterized in that a part of institute in the dc power translation circuit
It is connect after stating the output end parallel connection of bridge arm module with one end of the second source/load, in the dc power translation circuit
Another part described in bridge arm module output end it is in parallel after connect with the other end of the second source/load；
A part of bridge arm module is integrated on any substrate, and another part bridge arm module is integrated in described
On any substrate or another substrate.
3. DC power supply according to claim 1, which is characterized in that all described in the dc power translation circuit
It is connect after the output end of bridge arm module is in parallel with one end of the second source/load, one end of all bridge arm modules is simultaneously
It is connect after connection with the other end of the second source/load；
Each bridge arm module is integrated on the same substrate.
4. DC power supply according to claim 1, which is characterized in that the bridge arm module includes power bridge arm, the bridge
Arm module further includes at least one of DC support capacitor, drive module and filter inductance；
Wherein, the DC support capacitor is in parallel with the power bridge arm；
The drive module is connect with the driving end of each switching device in the power bridge arm, and the drive module is used
In providing the corresponding driving signal for each switching device；
The filter inductance is connected between the midpoint of the power bridge arm and the second source/load.
5. DC power supply according to claim 4, which is characterized in that further include detection module and control module；
Wherein, the detection module includes sensing device and conditioning circuit, the sensing device for measure first power supply/
The electric parameter of at least one of load, the DC bus, the bridge arm module and the second source/load obtains
Detection limit；The detection limit after conditioning is transmitted to control for improving the detection limit by the conditioning circuit
Module；
The control module is used for based on the detection limit and each bridge arm mould of power conversion demand output after the conditioning
The control signal of each switching device in block, and the control signal is transmitted in the corresponding bridge arm module
The drive module, so that the drive module can generate the driving signal based on the control signal.
6. DC power supply according to claim 5, which is characterized in that the control module is directed to each bridge arm module
The control signal of output is synchronous control signal or phase-shifted control signal.
7. DC power supply according to any one of claim 1 to 6, which is characterized in that it further include radiating module, it is described to dissipate
Thermal modules are closely mounted on each substrate back；The radiating mode that the radiating module uses includes natural air cooled, forced
At least one of air-cooled, heat pipe heat radiation and water-cooling.
8. DC power supply according to any one of claim 1 to 6, which is characterized in that it further include filter capacitor, the filter
Wave capacitor is in parallel with the second source/load.
9. DC power supply according to claim 8, which is characterized in that further include first switch and/or second switch；
The first switch is arranged between first power supply/load and the rectification circuit, and the second switch setting exists
Between the filter capacitor and the second source/load.
10. DC power supply according to any one of claim 1 to 6, which is characterized in that it further include cabinet, the rectification
Circuit and the dc power translation circuit are arranged in the box house；The opposite surface difference of any two of the cabinet
It is provided with tunnel inlet and ducting outlet.
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| CN201910242595.4A CN109980956B (en) | 2019-03-28 | 2019-03-28 | Direct current power supply |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910242595.4A CN109980956B (en) | 2019-03-28 | 2019-03-28 | Direct current power supply |
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| CN103997246A (en) * | 2014-05-08 | 2014-08-20 | 东北电力大学 | Bidirectional photovoltaic inverter based on high-frequency legs |
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