CN207588506U - A kind of digital current-sharing system of improvement type multiple module paralleling - Google Patents
A kind of digital current-sharing system of improvement type multiple module paralleling Download PDFInfo
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- CN207588506U CN207588506U CN201721746327.9U CN201721746327U CN207588506U CN 207588506 U CN207588506 U CN 207588506U CN 201721746327 U CN201721746327 U CN 201721746327U CN 207588506 U CN207588506 U CN 207588506U
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- current
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model belongs to charger technologies field, and in particular to a kind of digital current-sharing system of improvement type multiple module paralleling.Technical problem to be solved in the utility model is to propose a kind of digital current-sharing system of improvement type multiple module paralleling, and solution charge efficiency is low, the flimsy problem of charger.In order to solve the above-mentioned technical problem, the utility model proposes the digital current-sharing systems of such a improvement type multiple module paralleling, including multiple charging modules, multiple current sensors and multiple diodes, sampling resistor, current equalizing bus bar, comparator, equalizing controller and digitial controller are further included.The utility model has charging stable and efficient effect.
Description
Technical field
The utility model belongs to charger technologies field, and in particular to a kind of digital current-sharing system of improvement type multiple module paralleling
System.
Background technology
With the extensive use of the development of Power Electronic Technique and computer, communication, space station etc., high-power, high power
Density, the demand of the power-supply system of high reliability are continuously improved.If it is powered using separate unit power supply, due to power to be treated
It is bigger, bring difficulty to the raising of the selection of power device, switching frequency and power density.In addition, once event occurs for power supply
Barrier, will lead to the collapse of whole system.Therefore, high-power using multiple power module parallel runnings output is power technology development
Important directions.
The development of high power load demand and distributed power supply system so that the importance of switch power parallel technology is increasingly
Increase.In parallel system, each converter only handles smaller power, reduces stress；Redundancy can also be applied, improves system
System reliability.However, under normal circumstances, do not allow the output terminal direct paralleled of power module, it is necessary to true using equal Flow Technique
Protect the uniform load sharing electric current of each parallel module.Otherwise, the possible heavy duty of some parallel modules even overlond running, and some moulds
Block is then lightly loaded or no-load running, and as a result thermal stress distribution is uneven, easily damages, reduces the reliability of system.Therefore, it flows
Technology becomes the core of power sources in parallel technology.
Invention content
According to more than the deficiencies in the prior art, technical problem to be solved in the utility model is to propose that a kind of improvement type is more
The digital current-sharing system of wired in parallel, by using the digital current-sharing skill for the multiple electric vehicle charging module parallel connections for cutting peak compensation
Art, it is low to solve charge efficiency, the flimsy problem of charger, and there is charging to stablize and efficient effect.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：
A kind of digital current-sharing system of improvement type multiple module paralleling, including sampling resistor, equalizing controller, digital control
Device, comparator and multiple current-sharing modules, each current-sharing module are by charging module, current sensor and current amplifier series connection group
Into current-sharing module is connected with sampling resistor, and the other end of sampling resistor is connected to current equalizing bus bar, the both ends difference of sampling resistor
It is connected with the positive and negative input terminal of equalizing controller, the output terminal of equalizing controller is connected by comparing device with digitial controller, number
Word controller is connected respectively with each current-sharing module.
Preferably, the equalizing controller is made of the current feedback emitter follower of controller and multiple parallel connections, respectively
Current feedback emitter follower is connect respectively by connection with controller；Current feedback emitter follower is put including an operation
Big device and multiple power MOS pipes；Wherein, the grid of each power MOS pipe is connected to operational amplifier by a driving resistance respectively
Output terminal, the drain electrode of each power MOS pipe is in parallel, and the source electrode of each power MOS pipe is each by a power resistor parallel connection, each work(
(source electrode is connected on the negative terminal of operational amplifier to rate metal-oxide-semiconductor by a feedback resistance respectively.
Preferably, controller is the singlechip controller with current sample and D/A output controls.
Preferably, the charging module uses LLC half bridge resonant circuit.
A kind of digital current-sharing method of improvement type multiple module paralleling, is as follows：
Step S1：Each charging module address is compared, performs step S2；
Step S2：It detects whether to need to flow, otherwise terminates, be, perform step S3；
Step S3：Using the module that address is 0000001 as primary module, step S4 is performed；
Step S4：AD sampled values are read, perform step S5；
Step S5：Sampled value software filtering performs step S6；
Step S6：The individual module output current allowed band of rated current setting is compared, equal flow algorithm control is carried out, holds
Row step S7；
Step S7：PFM is exported, and realizes sharing control, return to step S1.
The utility model advantageous effect is:Using this system charge efficiency height, and each charging module is protected accordingly.
Description of the drawings
The content expressed by this specification attached drawing and the label in figure are briefly described below：
Fig. 1 is the overall structure figure of specific embodiment of the present utility model.
Fig. 2 is the comparator operating diagram of specific embodiment of the present utility model.
Fig. 3 is the equalizing controller structure diagram of the utility model.
Fig. 4 is the structure diagram of the current feedback emitter follower of the utility model.
Fig. 5 is the first typical LLC resonant converter circuit of the utility model.
Fig. 6 is second of typical LLC resonant converter circuit of the utility model.
Fig. 7 is the closed-loop simulation illustraton of model of the single LLC half bridge resonant of specific embodiment of the present utility model.
Fig. 8 is the work main flow schematic diagram of specific embodiment of the present utility model.
Fig. 9 is the work split flow schematic diagram of specific embodiment of the present utility model.
In figure：1- controllers, 2- current feedback emitter followers, 3- operational amplifiers, 4- feedback resistances, 5- driving electricity
Resistance, 6- power MOS pipes, 7- power resistors.
Specific embodiment
Below by the description to embodiment, the shape of for example involved each component of specific embodiment of the present utility model
The effect and operation principle of mutual alignment and connection relation, each section between shape, construction, each section, manufacturing process and operation
Application method etc., is described in further detail, those skilled in the art to be helped to conceive the utility model of the utility model,
Technical solution has more complete, accurate and deep understanding.
As depicted in figs. 1 and 2, a kind of digital current-sharing system of improvement type multiple module paralleling, including multiple charging modules, more
A current sensor and multiple diodes further include sampling resistor, current equalizing bus bar, equalizing controller and digitial controller, multiple
Charging module is connected in parallel, and each charging module is all connected to same adopt by a current sensor and a diode respectively
One end a points of sample resistance, the other end b points of sampling resistor are connected on a public current equalizing bus bar, and 2 points of a, b is also respectively with flowing
Two input endpoints of controller are connected, and the output terminal of equalizing controller is connected by comparing device with digitial controller, digital control
Device is connected respectively with each module.The voltage of current equalizing bus bar is the voltage signal Vi that multiple power modules represent respective output current
Average value (represents the average current that power-supply system is crossed).The wherein current lead-through diode of the charging module of electric current maximum, stream
After crossing the potential of potential and the b points of a points generation relatively, an error voltage V is exported by adjusting amplifierc, error voltage VcAgain
With reference voltage VrefTogether through comparator relatively after the new reference voltage V that generates’ ref, the module of electric current maximum is fed back to, is led to
Digitial controller is crossed, reduces its electric current, the part of reduction according to the principle that the conservation of energy and power are constant, is diverted to remaining
Module, so as to balance the electric current of each module.
Due to being identical reference voltage V every timeref, so the precision flowed will not be very high, so the utility model
By V ' each timerefReference voltage V as next cycleref, i.e. Vref(k+1)=V 'ref(k) (k=1,2 ... ...), with
Reference precision each time is improved, and then improves and flows precision.
Equalizing controller as shown in Figure 3 and Figure 4, the current feedback emitter follower 2 of multiple parallel connections pass through communication respectively
Line is connect with controller 1, which is the singlechip controller with current sample and D/A output controls.Each current feedback
Emitter follower 2 includes an operational amplifier 3 and multiple power MOS pipes 6；Wherein, the grid of each power MOS pipe 6 leads to respectively
The output terminal that a driving resistance 5 is attempted by operational amplifier 3 is crossed, the drain electrode of each power MOS pipe 6 is in parallel, each power MOS pipe 6
Source electrode it is in parallel each by power resistor 7, be connected between the source electrode and corresponding power resistor 7 of each power MOS pipe 6
One feedback resistance 4, the other end of each feedback resistance 4 are attempted by the negative terminal of operational amplifier 3.
Operation principle：When the anode of operational amplifier applies voltage, you can in the output of current feedback emitter follower
End obtains corresponding load current, 1 acquisition circuit electric current of controller, and is exported using D/A to multigroup current feedback emitter following
Device 2 carries out current control, so as to obtain high-precision large current load.The driving voltage of the load current and power MOS pipe
Unrelated, only related with power resistor 7, Current Negative Three-Point Capacitance can be generated by accessing the power resistor in circuit, so as to make to flow through each power
The electric current of metal-oxide-semiconductor source electrode tends to be balanced.
The charging module of the utility model using LLC half bridge resonant circuit, Fig. 4 and it is shown in fig. 5 be two
The typical LLC resonant converter circuit of kind, Fig. 7 show the closed-loop simulation illustraton of model of single LLC half bridge resonant.LLC
Converter is the size that its output voltage is controlled by PFM control strategies, that is, regulating switch plumber's working frequency is big
It is small to be exported to adjust.This method can improve some incomplete places during PWM controls, not have the impacted feelings of duty ratio
Condition occurs, so its power down is held time, Property comparison is good, and due to the increase of input voltage, and resonant groove path current peak exists
Reduce so that switching tube on-state loss, turn-off power loss are all reducing.
Due to output current sample and store in the system of LLC resonance circuits, so stream part
It needs to read this AD sampled value.The effect of sampled value software filtering is the precision in order to improve sampling.
In addition the comparison of data and calculating needs carry out in a main charging module, then the selection of main charging module is just
Requirement is made, since the data communication between each charging module is carried out by CAN communication, then pass through toggle switch
The address of each charging module is set, for example the charging module that setting address is 0000001 is main charging module, is counted accordingly
It calculates, and is transmitted and ordered by CAN.Here address is set in the ID of CAN, in the ID of the CAN of 29, with wherein
7 come distribution node address.
If during the work time, the main charging module of setting, which breaks down, can not continue to work normally, then due to CAN
Bus is a kind of multi-master bus, so in the remaining charging module for being set address before, it is automatically that address is minimum
Charging module upgrading for main charging module, and then continue the normal operation of whole system.
A kind of digital current-sharing method of the more charging module parallel connections of improvement type, is as follows：
Step S1：Each charging module address is compared, performs step S2；
Step S2：It detects whether to need to flow, otherwise terminates, be, perform step S3；
Step S3：Using the charging module that address is 0000001 as main charging module, step S4 is performed；
Step S4：AD sampled values are read, perform step S5；
Step S5：Sampled value software filtering performs step S6；
Step S6：The single charging module output current allowed band of rated current setting is compared, carries out equal flow algorithm control
System performs step S7；
Step S7：PFM is exported, and realizes sharing control, return to step S1.
The utility model is exemplarily described above, it is clear that the utility model is implemented not by aforesaid way
Limitation, as long as employing the improvement or not of various unsubstantialities that the methodology of the utility model and technical solution carry out
It is improved that the design of the utility model and technical solution are directly applied into other occasions, in the protection model of the utility model
Within enclosing.The scope of protection of the utility model should be determined by the scope of protection defined in the claims.
Claims (4)
1. a kind of digital current-sharing system of improvement type multiple module paralleling, which is characterized in that including sampling resistor, equalizing controller,
Digitial controller, comparator and multiple current-sharing modules, each current-sharing module are by charging module, current sensor and Current amplifier
Device is composed in series, and current-sharing module is connected with sampling resistor, and the other end of sampling resistor is connected to current equalizing bus bar, sampling resistor
Both ends are connected respectively with the positive and negative input terminal of equalizing controller, the output terminal of equalizing controller by comparing device with it is digital control
Device is connected, and digitial controller is connected respectively with each current-sharing module.
2. the digital current-sharing system of improvement type multiple module paralleling according to claim 1, which is characterized in that the equal flow control
Device processed is made of controller (1) and the current feedback emitter follower (2) of multiple parallel connections, each current feedback emitter follower
(2) it is connect respectively by connection with controller (1)；Current feedback emitter follower (2) including an operational amplifier (3) and
Multiple power MOS pipes (6)；Wherein, the grid of each power MOS pipe (6) is connected to operation amplifier by a driving resistance (5) respectively
The output terminal of device (3), the drain electrode of each power MOS pipe (6) is in parallel, and the source electrode of each power MOS pipe (6) is each by a power electricity
(7) parallel connection is hindered, the source electrode of each power MOS pipe (6) is connected on the negative terminal of operational amplifier (3) by a feedback resistance (4) respectively.
3. the digital current-sharing system of improvement type multiple module paralleling according to claim 2, which is characterized in that controller (1)
To carry the singlechip controller of current sample and D/A output controls.
4. the digital current-sharing system of improvement type multiple module paralleling according to claim 1, which is characterized in that the charging mould
Block uses LLC half bridge resonant circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721746327.9U CN207588506U (en) | 2017-12-14 | 2017-12-14 | A kind of digital current-sharing system of improvement type multiple module paralleling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721746327.9U CN207588506U (en) | 2017-12-14 | 2017-12-14 | A kind of digital current-sharing system of improvement type multiple module paralleling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207588506U true CN207588506U (en) | 2018-07-06 |
Family
ID=62737946
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721746327.9U Expired - Fee Related CN207588506U (en) | 2017-12-14 | 2017-12-14 | A kind of digital current-sharing system of improvement type multiple module paralleling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207588506U (en) |
-
2017
- 2017-12-14 CN CN201721746327.9U patent/CN207588506U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180706 Termination date: 20181214 |
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| CF01 | Termination of patent right due to non-payment of annual fee |