CN106374550A - Electric vehicle charging system and charging control method thereof - Google Patents
Electric vehicle charging system and charging control method thereof Download PDFInfo
- Publication number
- CN106374550A CN106374550A CN201510444047.1A CN201510444047A CN106374550A CN 106374550 A CN106374550 A CN 106374550A CN 201510444047 A CN201510444047 A CN 201510444047A CN 106374550 A CN106374550 A CN 106374550A
- Authority
- CN
- China
- Prior art keywords
- charge controller
- charge
- bridge
- charging system
- synchronizing signal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention discloses a charging control method for an electric vehicle charging system. The method comprises the following steps: synchronous signals are transmitted in real time through a synchronous signal generator; each charging controller acquires the synchronous signals respectively, and the acquired synchronous signals are recognized respectively to judge whether the acquired synchronous signals are normal; and if the acquired synchronous signals are judged to be normal, each charging controller calculates the duty ratio of self output according to the current charging power, and through adjusting the duty ratio of the self output, when an upper bridge of any of multiple inverter bridges is on, lower bridges of the remaining other inverter bridges are in an off state. According to the control method of the invention, carrier synchronization is realized through the synchronous signal generator to transmit the synchronous signals in real time, circulating current and harmonic can be effectively reduced, and high-efficiency and stable operation of the charging system can be ensured. The invention also discloses an electric vehicle charging system.
Description
Technical field
The present invention relates to electric vehicle engineering field, more particularly, to a kind of charge control method of charging system for electric automobile and
A kind of charging system for electric automobile.
Background technology
In order to obtain carrier synchronization signal, can be using insertion pilot frequency carrier wave Synchronos method.When comprising discrete load in receipt signal
During wave component, carrier wave can be isolated from signal so that as local synchronization signal, that so separates is local in receiving terminal
The frequency of synchronizing signal is inevitable identical with the carrier frequency of receipt signal, carries out coherent demodulation using this synchronizing signal and realizes two
Individual or two or more parallel operation module carrier frequency consistent.
But in actual applications, when being adopted using same charging device, dual controller is in parallel to charge to same battery, and
It is impossible to ensure the consistent of carrier frequency simultaneously when two controller parallel connections work, the upper brachium pontis of a controller therefore occurs
Situation about simultaneously opening with the lower brachium pontis of another one controller, thus lead to that circulation in two controllers and harmonic wave is larger.
Two controllers of parallel operation are substantially independent, but other a lot of modules have signal to interact with car load, signal very complicated and
Easily disturbed, therefore easily lead to that circulation in two controllers and the larger situation of harmonic wave is so that charging system cannot
Stable, high-speed cruising.
In addition although the frequency of the local synchronization signal separated is identical with carrier frequency, but phase place to be ensured is also identical,
Still need to make the appropriate adjustments, and when not comprising discrete carrier component in receipt signal, also need with complicated method from reception
Carrier wave is extracted in signal.
Content of the invention
It is contemplated that at least solving one of technical problem in correlation technique to a certain extent.For this reason, the one of the present invention
Purpose is to propose a kind of charge control method of charging system for electric automobile, sends synchronization in real time by synchronous generator
Signal, to realize carrier synchronization, effectively reduces circulation harmonic it is ensured that charging system efficient stable runs.
Further object is that proposing a kind of charging system for electric automobile.
For achieving the above object, one aspect of the present invention embodiment proposes a kind of charge control method of charging system for electric automobile,
Described charging system for electric automobile includes multiple charge controllers of parallel connection, and each in the plurality of charge controller charges and control
Device processed all includes inverter bridge, and described charge control method comprises the following steps: sends synchronization in real time by synchronous generator
Signal；Each charge controller described obtains described synchronizing signal respectively, and respectively the synchronizing signal obtaining is identified with
Judge whether the synchronizing signal obtaining is normal；And if it is determined that the synchronizing signal obtaining is normal, each charge controller described
Calculate the dutycycle of itself output always according to current charge power, and by adjusting the dutycycle of itself output so that multiple inversion
When in bridge, the upper bridge of any one inverter bridge is opened, the lower bridge of other inverter bridge remaining remains off.
The charge control method of the charging system for electric automobile of the embodiment of the present invention, is sent same in real time by synchronous generator
Step signal, each charge controller obtains synchronizing signal respectively, and respectively the synchronizing signal obtaining is identified to judge to obtain
Whether the synchronizing signal taking is normal, if it is determined that the synchronizing signal obtaining is normal, each charge controller charges always according to current
The dutycycle of power calculation itself output, and by adjusting the dutycycle of itself output so that in multiple inverter bridge any one is inverse
When the upper bridge of change bridge is opened, the lower bridge of other inverter bridge remaining remains off, thus real-time by synchronous generator
Send synchronizing signal to realize carrier synchronization, effectively reduce circulation harmonic so that same charging device can pass through multiple
Charge controller in parallel gives same power battery charging, meet the demand of high-power charging it is ensured that charging system efficiently,
Stable operation, compared with traditional extraction carrier signal from receipt signal, can not only effectively reduce circulation harmonic, and
And simpler, and cost is than relatively low.
According to one embodiment of present invention, described synchronous generator is arranged independent of the plurality of charge controller.
According to another embodiment of the invention, using any one charge controller in the plurality of charge controller as institute
State synchronous generator.
In some embodiments of the invention, described synchronizing signal is rectangular pulse signal, and each charge controller described passes through
The rising edge of described rectangular pulse signal, trailing edge and pulse period are identified to judge that described rectangular pulse signal is
No normal.
According to one embodiment of present invention, when any one charge controller in the plurality of charge controller judges to obtain
Described rectangular pulse signal abnormal when, this charge controller quits work.
According to one embodiment of present invention, when the plurality of charge controller is the first charge controller and the second charge control
During device, if the charge power of the charge power of described first charge controller and described second charge controller is equal, institute
State the first charge controller and the dutycycle of described second charge controller adjusted in concert itself output, so that described first charging
In the upper bridge of inverter bridge/lower bridge and described second charge controller in controller, the upper bridge/lower bridge of inverter bridge is opened simultaneously and is closed simultaneously
Close.
For achieving the above object, another aspect of the present invention embodiment proposes a kind of charging system for electric automobile, believes including synchronous
Number generator and multiple charge controllers in parallel, each charge controller in the plurality of charge controller all includes inversion
Bridge, wherein, sends synchronizing signal in real time by described synchronous generator, and each charge controller described obtains institute respectively
State synchronizing signal, and respectively the synchronizing signal obtaining is identified whether normal to judge the synchronizing signal obtaining；And such as
Fruit judges that the synchronizing signal obtaining is normal, and each charge controller described calculates accounting for of itself output always according to current charge power
Empty ratio, and by adjusting the dutycycle of itself output so that residue when the upper bridge of any one inverter bridge is opened in multiple inverter bridge
The lower bridge of other inverter bridge remain off.
Charging system for electric automobile according to embodiments of the present invention, sends synchronizing signal in real time by synchronous generator, often
Individual charge controller obtains synchronizing signal respectively, and respectively the synchronizing signal obtaining is identified to judge the synchronization letter obtaining
Number whether normal, if it is determined that the synchronizing signal obtaining is normal, each charge controller always according to current charge power calculate from
Body output dutycycle, and by adjust itself output dutycycle so that in multiple inverter bridge any one inverter bridge upper bridge
When opening, the lower bridge of other inverter bridge remaining remains off, thus sending synchronous letter in real time by synchronous generator
Number realizing carrier synchronization, effectively reduce circulation harmonic so that same charging device can be by multiple chargings in parallel
Same power battery charging given by controller, meet the demand of high-power charging it is ensured that charging system efficiently, stable operation,
Compared with the charging system of traditional extraction carrier signal from receipt signal, circulation harmonic can not only be effectively reduced, and
And eliminate the peripheral hardware hardware obtaining carrier signal and adjusting demodulated signal, reduce cost, and charging system is simple and reliable.
According to one embodiment of present invention, described synchronous generator is arranged independent of the plurality of charge controller.
According to another embodiment of the invention, described synchronous generator is any one in the plurality of charge controller
Individual charge controller.
In some embodiments of the invention, described synchronizing signal is rectangular pulse signal, and each charge controller described passes through
The rising edge of described rectangular pulse signal, trailing edge and pulse period are identified to judge that described rectangular pulse signal is
No normal.
According to one embodiment of present invention, when any one charge controller in the plurality of charge controller judges to obtain
Described rectangular pulse signal abnormal when, this charge controller quits work.
According to one embodiment of present invention, when the plurality of charge controller is the first charge controller and the second charge control
During device, if the charge power of the charge power of described first charge controller and described second charge controller is equal, institute
State the first charge controller and the dutycycle of described second charge controller adjusted in concert itself output, so that described first charging
In the upper bridge of inverter bridge/lower bridge and described second charge controller in controller, the upper bridge/lower bridge of inverter bridge is opened simultaneously and is closed simultaneously
Close.
Brief description
Fig. 1 is the flow chart of the charge control method of charging system for electric automobile according to embodiments of the present invention.
Fig. 2 is the flow chart of the charge control of each charge controller according to an embodiment of the invention.
Fig. 3 is the block diagram of charging system for electric automobile according to an embodiment of the invention.
Reference: synchronous generator 10, multiple charge controllers 20 in parallel, the first charge controller 21, second
Charge controller 22 ..., the n-th charge controller 2n.
Specific embodiment
Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein identical from start to finish
Or the element that similar label represents same or similar element or has same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary it is intended to be used for explaining the present invention, and is not considered as limiting the invention.
To describe with reference to the accompanying drawings proposition according to embodiments of the present invention charging system for electric automobile charge control method with
And charging system for electric automobile.
In charging system for electric automobile, generally adopt two charge controllers in parallel to work with to power battery charging simultaneously,
But due to the consistent of carrier frequency cannot be ensured, therefore it is easy to occur in a charge controller the upper bridge of inverter bridge and another
Situation that in an outer charge controller, the lower bridge of inverter bridge is opened simultaneously is so that charging device, two charge controls in parallel
Device and electrokinetic cell form loop in running, lead to that circulation in two charge controllers in parallel and harmonic wave is larger.
Therefore, embodiments of the invention propose a kind of charge control method of charging system for electric automobile, to effectively reduce circulation simultaneously
Reduce harmonic wave.
Fig. 1 is the flow chart of the charge control method of charging system for electric automobile according to embodiments of the present invention, wherein, electronic
Automobile charging system actual includes multiple charge controllers of parallel connection, and each charge controller in multiple charge controllers all includes inverse
Become bridge.As shown in figure 1, the charge control method of this charging system for electric automobile comprises the following steps:
S1, sends synchronizing signal in real time by synchronous generator.
According to one embodiment of present invention, synchronous generator is arranged independent of multiple charge controllers.
According to another embodiment of the invention, using any one charge controller in multiple charge controllers as synchronous letter
Number generator.
That is, synchronizing signal can be sent in real time by third party, that is, by the synchronization letter independent of multiple charge controllers
Number generator is sent in real time it is also possible to be sent out in real time by the module in any one charge controller in multiple charge controllers
Go out, when one of multiple charge controllers charge controller is as synchronous generator, this charge controller is not only real
When send synchronizing signal, and the synchronizing signal that real-time reception itself sends.
S2, each charge controller obtains synchronizing signal respectively, and respectively the synchronizing signal obtaining is identified to judge to obtain
Whether the synchronizing signal taking is normal.
In some embodiments of the invention, synchronizing signal is rectangular pulse signal, and each charge controller is by rectangle arteries and veins
Rising edge, trailing edge and the pulse period of rushing signal are identified to judge whether rectangular pulse signal is normal.
S3, if it is determined that the synchronizing signal obtaining is normal, it is defeated that each charge controller calculates itself always according to current charge power
The dutycycle going out, and by adjust itself output dutycycle so that in multiple inverter bridge the upper bridge of any one inverter bridge open-minded
When other inverter bridge remaining lower bridge remain off.
According to one embodiment of present invention, when any one charge controller in multiple charge controllers judges the square of acquisition
When shaped pulse signal is abnormal, this charge controller quits work.
Carried out specifically using one of multiple charge controllers in parallel charge controller as synchronous generator below
Bright.
Specifically, when one of multiple charge controllers in parallel charge controller is as synchronous generator, this fills
Electric controller externally sends the synchronizing signal of fixed frequency in real time, and such as frequency is the rectangular pulse signal of 50hz, and passes through rigid line
It is transmitted separately to each charge controller (including itself), each charge controller receives this rectangular pulse signal, and to reception
The rising edge of rectangular pulse signal, trailing edge and pulse period be identified, to ensure the rectangular pulse signal receiving
Normally, that is, the rectangular pulse signal receiving is same signal (cycle, phase and amplitude all same).
When the rectangular pulse signal that each charge controller receives is all normal, each charge controller is according to current charging work(
Rate calculates the dutycycle of itself output, simultaneously using the rectangular pulse signal receiving as the one-component of duty cycle adjustment, leads to
The dutycycle overregulating itself output is so that the upper bridge of any one inverter bridge other inversions remaining when opening in multiple inverter bridge
The lower bridge of bridge remains off；When the rectangular pulse that any one charge controller in multiple charge controllers receives is believed
When number abnormal, for example, when the cycle of the rectangular pulse signal receiving being not equal to the default cycle, judge the square receiving
Shaped pulse signal is interfered, if this charge controller continues to work, circulation remains unchanged and exists, and therefore needs to control this to fill
Electric controller quits work, to prevent the generation of circulation phenomenon；When any one charge controller in multiple charge controllers
When not receiving rectangular pulse signal, judge that this rectangular pulse signal lost efficacy, now control this charge controller to quit work.
Thus be effectively ensured charging system can stablize, high-speed cruising.
It should be noted that the synchronizing signal in order to avoid sending is disturbed, screen layer can be added on rigid line, meanwhile, be
Reduce as far as possible and produce larger time delay because transmission distance is too far away, the transmission range of rigid line need to be in preset range, and this is preset
Scope can be demarcated according to practical situation.
Further, a specific example according to the present invention, as shown in Fig. 2 the charge control mistake of each charge controller
Journey comprises the following steps:
S101, judges whether as synchronous generator.If it is, execution step s102；If not, execution step s111.
S102, externally sends synchronizing signal in real time, receives synchronizing signal simultaneously.
S103, judges whether to receive synchronizing signal.If it is, execution step s106；If not, execution step s104.
S104, synchronizing signal lost efficacy.
S105, this charge controller quits work.
S106, judges whether the cycle of the synchronizing signal receiving is fixed.If it is, execution step s109；If not, holding
Row step s107.
S107, synchronizing signal is abnormal.
S108, this charge controller quits work.
S109, adjusts output duty cycle.
S110, parallel running.
S111, real-time reception synchronizing signal.
S112, judges whether to receive synchronizing signal.If it is, execution step s115；If not, execution step s113.
S113, synchronizing signal lost efficacy.
S114, this charge controller quits work.
S115, judges whether the cycle of the synchronizing signal receiving is fixed.If it is, execution step s117；If not, holding
Row step s115.
S115, synchronizing signal is abnormal.
S116, this charge controller quits work.
S117, adjusts output duty cycle.
S118, parallel running.
According to one embodiment of present invention, when multiple charge controllers are the first charge controller and the second charge controller,
If the charge power of the charge power of the first charge controller and the second charge controller is equal, the first charge controller and
Second charge controller adjusted in concert itself output dutycycle so that in the first charge controller the upper bridge/lower bridge of inverter bridge and
In second charge controller, the upper bridge of inverter bridge/lower bridge is opened simultaneously and is simultaneously closed off.
Specifically, when the charge power of the first charge controller in parallel and the second charge controller is equal or difference is less,
The pwm of two charge controllers in parallel can be made come adjusted in concert itself by the dutycycle that synchronizing signal exports
(pulse-width modulation, pulsewidth modulation) waveform is completely superposed, i.e. inversion in two charge controllers in parallel
The upper bridge of bridge or lower bridge are opened simultaneously and are simultaneously closed off.But, when the first charge controller in parallel and the second charge controller
Charge power difference larger when, even if adjusted using synchronizing signal itself output dutycycle, also cannot ensure two simultaneously
The pwm waveform of the charge controller of connection is completely superposed, thus when leading to the upper bridge of inverter bridge in a charge controller to be opened,
In another charge controller, the lower bridge of inverter will be closed but had not been fully closed.
Further, when the charge power difference of multiple charge controllers in parallel is larger, by synchronizing signal Lai same step
Saving itself output duty cycle can not make the pwm waveform of multiple charge controllers of parallel connection be completely superposed, i.e. multiple chargings in parallel
When in controller, the upper bridge of inverter bridge is opened simultaneously, the lower bridge of other charge controllers remaining is not necessarily closed, accordingly, it would be desirable to
Control the charge power of multiple charge controllers in parallel equal or difference is less so that circulation solve effect reach best.
Waveform when simultaneously being run with two charge controllers in parallel below to illustrate the beneficial effect of the embodiment of the present invention.
When two charge controller parallel runnings, if be provided without any signal carried out to the output duty cycle of charge controller
Adjust, be then easy to occur the lower bridge of inverter bridge in the upper bridge of inverter bridge and another charge controller in a charge controller
Simultaneously open-minded, now current harmonics is larger, and contains DC component, there is circulation.
When two charge controller parallel runnings, if the synchronizing signal adopting is not same signal, two charge controls
The pwm waveform of device not exclusively overlaps, when that is, in a charge controller, the upper bridge of inverter bridge is opened, another charge control
In device, the lower bridge of inverter bridge there is also situation about opening, and now current phasor is equal in magnitude in opposite direction, there is circulation.
When two charge controller parallel runnings, if using same signal as synchronizing signal, but two charge controllers
Charge power difference larger when, for example, the charge power of a charge controller is 10kw, another charge controller
Charge power is 100kw, and now although circulation is smaller, but current waveform sine degree is poor, and that is, harmonic wave is larger.
When two charge controller parallel runnings, if using same signal as synchronizing signal, and two charge controls
When the charge power of device is equal or differs less, now the phase place of current waveform is consistent, equal in magnitude, and current waveform
When sine degree is more larger than charge power difference, the sine degree of current waveform is good, and line smoothing, and harmonic wave is less.Therefore,
The charge control method of the embodiment of the present invention can effectively reduce circulation harmonic, meets the demand of high-power charging it is ensured that filling
Electric system is efficient, stable operation.
In sum, the charge control method of the charging system for electric automobile of the embodiment of the present invention, by synchronous generator
Send synchronizing signal in real time, each charge controller obtains synchronizing signal respectively, and respectively the synchronizing signal obtaining is known
Whether abnormal to judge the synchronizing signal obtaining, if it is determined that the synchronizing signal obtaining is normal, each charge controller also root
Calculate the dutycycle of itself output according to current charge power, and by adjusting the dutycycle of itself output so that in multiple inverter bridge
The upper bridge of any one inverter bridge when opening the lower bridge of other inverter bridge remaining remain off, thus pass through synchronizing signal
Generator sends synchronizing signal to realize carrier synchronization in real time, effectively reduces circulation harmonic so that same charging device energy
Enough passing through multiple charge controllers in parallel to same power battery charging, meeting the demand of high-power charging it is ensured that charging
System high efficiency, stable operation, compared with traditional extraction carrier signal from receipt signal, can not only effectively reduce circulation
Harmonic, and simpler, and cost is than relatively low.
Fig. 3 is the block diagram of charging system for electric automobile according to an embodiment of the invention.As shown in figure 3, should
Charging system for electric automobile includes: synchronous generator 10 and multiple charge controllers 20 in parallel, multiple charge controls
Each charge controller in device 20 (the first charge controller 21, the second charge controller 22 ..., the n-th charge control
Device 2n) all include inverter bridge.
Wherein, synchronizing signal is sent in real time by synchronous generator 10, each charge controller obtains synchronizing signal respectively,
And respectively to obtain synchronizing signal be identified with judge obtain synchronizing signal whether normal.If it is determined that the synchronization obtaining
Signal is normal, and each charge controller calculates the dutycycle of itself output always according to current charge power, and by adjusting itself
The dutycycle of output so that when in multiple inverter bridge, the upper bridge of any one inverter bridge is opened the lower bridge of other inverter bridge remaining protect
Hold closed mode.
According to one embodiment of present invention, as shown in figure 3, synchronous generator 10 is independent of multiple charge controllers 20
Setting.
According to one embodiment of present invention, synchronous generator 10 fills for any one in multiple charge controllers 20
Electric controller.
That is, synchronizing signal can be sent in real time by third party, that is, by the synchronization independent of multiple charge controllers 20
Signal generator 10 sends in real time it is also possible to pass through the mould in any one charge controller in multiple charge controllers 20
Block sends in real time, when one of multiple charge controllers 20 charge controller is as synchronous generator, this charging control
Device processed not only sends synchronizing signal in real time, and the synchronizing signal that real-time reception itself sends, for example, it is possible to first is charged
Controller 21 not only sends synchronizing signal in real time as synchronous generator 10, the first charge controller 21, and in real time
Receive the synchronizing signal itself sending.
In some embodiments of the invention, synchronizing signal is rectangular pulse signal, and each charge controller is by rectangle arteries and veins
Rising edge, trailing edge and the pulse period of rushing signal are identified to judge whether rectangular pulse signal is normal.
According to one embodiment of present invention, when any one charge controller in multiple charge controllers 20 judges acquisition
When rectangular pulse signal is abnormal, this charge controller quits work.
It is described in detail using the first charge controller 21 as synchronous generator 10 below.
Specifically, when the first charge controller 21 is as synchronous generator 10, the first charge controller 21 is right in real time
Send outward the synchronizing signal of fixed frequency, such as frequency is the rectangular pulse signal of 50hz, and is transmitted separately to each by rigid line
Charge controller (includes itself), and each charge controller receives this rectangular pulse signal, and to the rectangular pulse signal receiving
Rising edge, trailing edge and pulse period be identified, normal to ensure the rectangular pulse signal receiving, that is, receive
Rectangular pulse signal is same signal (cycle, phase and amplitude all same).
When the rectangular pulse signal that each charge controller receives is all normal, each charge controller is according to current charging work(
Rate calculates the dutycycle of itself output, simultaneously using the rectangular pulse signal receiving as the one-component of duty cycle adjustment, leads to
The dutycycle overregulating itself output is so that the upper bridge of any one inverter bridge other inversions remaining when opening in multiple inverter bridge
The lower bridge of bridge remains off；The rectangular pulse receiving when any one charge controller in multiple charge controllers 20
During abnormal signal, for example, when the cycle of the rectangular pulse signal receiving being not equal to the default cycle, judgement receives
Rectangular pulse signal is interfered, if this charge controller continues to work, circulation remains unchanged and exists, and therefore needs to control and is somebody's turn to do
Charge controller quits work, to prevent the generation of circulation phenomenon；Control when any one in multiple charge controllers 20 charges
When device processed does not receive rectangular pulse signal, judge that this rectangular pulse signal lost efficacy, now control this charge controller to stop work
Make.Thus be effectively ensured charging system can stablize, high-speed cruising.
Further, the charging control process of each charge controller is as shown in Figure 2.
It should be noted that the synchronizing signal in order to avoid sending is disturbed, screen layer can be added on rigid line, meanwhile, be
Reduce as far as possible and produce larger time delay because transmission distance is too far away, the transmission range of rigid line need to be in preset range, and this is preset
Scope can be demarcated according to practical situation.
According to one embodiment of present invention, when multiple charge controllers 20 are the first charge controller 21 and the second charging control
During device 22 processed, if the charge power of the charge power of the first charge controller 21 and the second charge controller 21 is equal,
First charge controller 21 and the dutycycle of the second charge controller 22 adjusted in concert itself output, so that the first charge control
In the upper bridge of inverter bridge/lower bridge and the second charge controller 22 in device 21, the upper bridge/lower bridge of inverter bridge is opened simultaneously and is simultaneously closed off.
Specifically, when the charge power of the first charge controller 21 in parallel and the second charge controller 22 is equal or differs relatively
Hour, the pwm waveform of two charge controllers in parallel can be made come adjusted in concert itself by the dutycycle that synchronizing signal exports
It is completely superposed, that is, in two charge controllers in parallel, the upper bridge of inverter bridge or lower bridge are opened simultaneously and simultaneously closed off.But,
When the charge power difference of the first charge controller 21 in parallel and the second charge controller 22 is larger, even if using synchronous
Signal, to adjust the dutycycle of itself output, also cannot ensure that the pwm waveform of two charge controllers in parallel is completely superposed,
Thus when leading to the upper bridge of inverter bridge in a charge controller to be opened, in another charge controller, the lower bridge of inverter will
Close but have not been fully closed.
Further, when the charge power difference of multiple charge controllers 20 in parallel is larger, by synchronizing signal Lai synchronous
Adjusting itself output duty cycle can not make the pwm waveform of multiple charge controllers 20 of parallel connection be completely superposed, and that is, parallel connection is multiple
When in charge controller 20, the upper bridge of inverter bridge is opened simultaneously, the lower bridge of other charge controllers remaining is not necessarily closed, therefore,
Needs control the charge power of multiple charge controllers 20 in parallel equal or difference is less, so that circulation solves effect and reaches
Good.
Waveform when simultaneously being run with two charge controllers in parallel below to illustrate the beneficial effect of the embodiment of the present invention.
When two charge controller parallel runnings, if be provided without any signal carried out to the output duty cycle of charge controller
Adjust, be then easy to occur the lower bridge of inverter bridge in the upper bridge of inverter bridge and another charge controller in a charge controller
Simultaneously open-minded, now current harmonics is larger, and contains DC component, there is circulation.
When two charge controller parallel runnings, if the synchronizing signal adopting is not same signal, two charge controls
The pwm waveform of device not exclusively overlaps, when that is, in a charge controller, the upper bridge of inverter bridge is opened, another charge control
In device, the lower bridge of inverter bridge there is also situation about opening, and now current phasor is equal in magnitude in opposite direction, there is circulation.
When two charge controller parallel runnings, if using same signal as synchronizing signal, but two charge controllers
Charge power difference larger when, for example, the charge power of a charge controller is 10kw, another charge controller
Charge power is 100kw, and now although circulation is smaller, but current waveform sine degree is poor, and that is, harmonic wave is larger.
When two charge controller parallel runnings, if using same signal as synchronizing signal, and two charge controls
When the charge power of device is equal or differs less, now the phase place of current waveform is consistent, equal in magnitude, and current waveform
When sine degree is more larger than charge power difference, the sine degree of current waveform is good, and line smoothing, and harmonic wave is less.Therefore,
Circulation harmonic in the charging system for electric automobile of the embodiment of the present invention is all smaller it is ensured that charging system is efficient, stable
Run.
Charging system for electric automobile according to embodiments of the present invention, sends synchronizing signal in real time by synchronous generator, often
Individual charge controller obtains synchronizing signal respectively, and respectively the synchronizing signal obtaining is identified to judge the synchronization letter obtaining
Number whether normal, if it is determined that the synchronizing signal obtaining is normal, each charge controller always according to current charge power calculate from
Body output dutycycle, and by adjust itself output dutycycle so that in multiple inverter bridge any one inverter bridge upper bridge
When opening, the lower bridge of other inverter bridge remaining remains off, thus sending synchronous letter in real time by synchronous generator
Number realizing carrier synchronization, effectively reduce circulation harmonic so that same charging device can be by multiple chargings in parallel
Same power battery charging given by controller, meet the demand of high-power charging it is ensured that charging system efficiently, stable operation,
Compared with the charging system of traditional extraction carrier signal from receipt signal, circulation harmonic can not only be effectively reduced, and
And eliminate the peripheral hardware hardware obtaining carrier signal and adjusting demodulated signal, reduce cost, and charging system is simple and reliable.
In describing the invention it is to be understood that term " " center ", " longitudinal ", " horizontal ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ",
" outward ", the orientation of instruction such as " clockwise ", " counterclockwise ", " axial ", " radially ", " circumferential " or position relationship be based on
Orientation shown in the drawings or position relationship, are for only for ease of the description present invention and simplify description, rather than instruction or hint institute
The device referring to or element must have specific orientation, with specific azimuth configuration and operation, therefore it is not intended that to this
Bright restriction.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can be expressed
Or implicitly include at least one this feature.In describing the invention, " multiple " are meant that at least two, such as two
Individual, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection ", " fixation "
Should be interpreted broadly Deng term, for example, it may be being fixedly connected or being detachably connected or integral；Can be
It is mechanically connected or electrically connect；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, can be two
The connection of individual element internal or the interaction relationship of two elements, limit unless otherwise clear and definite.Common for this area
For technical staff, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score can
Being the first and second feature directly contacts, or the first and second features pass through intermediary mediate contact.And, the
One feature second feature " on ", " top " and " above " but fisrt feature directly over second feature or
Oblique upper, or it is merely representative of fisrt feature level height higher than second feature.Fisrt feature second feature " under ",
" lower section " and " below " can be fisrt feature immediately below second feature or obliquely downward, or it is special to be merely representative of first
Levy level height and be less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. mean specific features with reference to this embodiment or example description, structure, material or
Feature is contained at least one embodiment or the example of the present invention.In this manual, the schematic representation to above-mentioned term
Necessarily it is directed to identical embodiment or example.And, the specific features of description, structure, material or feature are permissible
Any one or more embodiments or example combine in an appropriate manner.Additionally, in the case of not conflicting, ability
The feature of the different embodiments described in this specification or example and different embodiment or example can be entered by the technical staff in domain
Row combines and combines.
Although embodiments of the invention have been shown and described above it is to be understood that above-described embodiment is exemplary,
It is not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, changes, replacing and modification.
Claims (12)
1. a kind of charge control method of charging system for electric automobile is it is characterised in that described charging system for electric automobile includes
Multiple charge controllers in parallel, each charge controller in the plurality of charge controller all includes inverter bridge, described fills
Electric control method comprises the following steps:
Synchronizing signal is sent in real time by synchronous generator；
Each charge controller described obtains described synchronizing signal respectively, and respectively the synchronizing signal obtaining is identified to sentence
Whether the disconnected synchronizing signal obtaining is normal；And
If it is determined that the synchronizing signal obtaining is normal, it is defeated that each charge controller described calculates itself always according to current charge power
The dutycycle going out, and by adjust itself output dutycycle so that in multiple inverter bridge the upper bridge of any one inverter bridge open-minded
When other inverter bridge remaining lower bridge remain off.
2. the charge control method of charging system for electric automobile according to claim 1 is it is characterised in that described synchronization
Signal generator is arranged independent of the plurality of charge controller.
3. the charge control method of charging system for electric automobile according to claim 1 is it is characterised in that will be described many
Any one charge controller in individual charge controller is as described synchronous generator.
4. the charging system for electric automobile according to any one of claim 1-3 charge control method it is characterised in that
Described synchronizing signal is rectangular pulse signal, each charge controller described by the rising edge of described rectangular pulse signal,
Trailing edge and pulse period are identified to judge whether described rectangular pulse signal is normal.
5. the charge control method of charging system for electric automobile according to claim 4 is it is characterised in that work as described many
When any one charge controller in individual charge controller judges the described rectangular pulse signal exception obtaining, this charge control
Device quits work.
6. the charge control method of charging system for electric automobile according to claim 1 is it is characterised in that work as described many
When individual charge controller is the first charge controller and the second charge controller,
If the charge power of the charge power of described first charge controller and described second charge controller is equal, described
First charge controller and the dutycycle of described second charge controller adjusted in concert itself output, so that described first charging control
In the upper bridge of inverter bridge/lower bridge and described second charge controller in device processed, the upper bridge/lower bridge of inverter bridge is opened simultaneously and is closed simultaneously
Close.
7. a kind of charging system for electric automobile is it is characterised in that include synchronous generator and multiple charge controls in parallel
Device, each charge controller in the plurality of charge controller all includes inverter bridge, wherein,
Synchronizing signal is sent in real time by described synchronous generator, each charge controller described obtains described synchronization respectively
Signal, and respectively the synchronizing signal obtaining is identified whether normal to judge the synchronizing signal obtaining；And
If it is determined that the synchronizing signal obtaining is normal, it is defeated that each charge controller described calculates itself always according to current charge power
The dutycycle going out, and by adjust itself output dutycycle so that in multiple inverter bridge the upper bridge of any one inverter bridge open-minded
When other inverter bridge remaining lower bridge remain off.
8. charging system for electric automobile according to claim 7 is it is characterised in that described synchronous generator is independent
In the setting of the plurality of charge controller.
9. charging system for electric automobile according to claim 7 is it is characterised in that described synchronous generator is institute
State any one charge controller in multiple charge controllers.
10. the charging system for electric automobile according to any one of claim 7-9 is it is characterised in that described synchronization is believed
Number be rectangular pulse signal, each charge controller described by the rising edge of described rectangular pulse signal, trailing edge and
Pulse period is identified to judge whether described rectangular pulse signal is normal.
11. charging system for electric automobile according to claim 10 are it is characterised in that work as the plurality of charge controller
In any one charge controller when judging that the described rectangular pulse signal that obtains is abnormal, this charge controller quits work.
12. charging system for electric automobile according to claim 7 are it is characterised in that work as the plurality of charge controller
During for the first charge controller and the second charge controller, if the charge power of described first charge controller and described second
The charge power of charge controller is equal, then described first charge controller and described second charge controller adjusted in concert itself
The dutycycle of output, so that inverse in the upper bridge/lower bridge of inverter bridge and described second charge controller in described first charge controller
Upper bridge/lower the bridge becoming bridge is opened simultaneously and is simultaneously closed off.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510444047.1A CN106374550A (en) | 2015-07-24 | 2015-07-24 | Electric vehicle charging system and charging control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510444047.1A CN106374550A (en) | 2015-07-24 | 2015-07-24 | Electric vehicle charging system and charging control method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106374550A true CN106374550A (en) | 2017-02-01 |
Family
ID=57880914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510444047.1A Pending CN106374550A (en) | 2015-07-24 | 2015-07-24 | Electric vehicle charging system and charging control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106374550A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110912228A (en) * | 2019-12-02 | 2020-03-24 | 科华恒盛股份有限公司 | Charge and discharge control method, charge and discharge control device and UPS |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1430325A (en) * | 2001-12-31 | 2003-07-16 | 艾默生网络能源有限公司 | Switch synchronization method of parallel converter system. |
| CN101071954A (en) * | 2007-04-05 | 2007-11-14 | 南京航空航天大学 | Parallel-working sine ware inverter |
| CN101447728A (en) * | 2008-12-25 | 2009-06-03 | 广东易事特电源股份有限公司 | Synchronous pulse-sending method and system thereof for UPS parallel machine |
| CN104362874A (en) * | 2014-10-28 | 2015-02-18 | 许继电气股份有限公司 | Method for restraining ring current of modularized photovoltaic inverter |
-
2015
- 2015-07-24 CN CN201510444047.1A patent/CN106374550A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1430325A (en) * | 2001-12-31 | 2003-07-16 | 艾默生网络能源有限公司 | Switch synchronization method of parallel converter system. |
| CN101071954A (en) * | 2007-04-05 | 2007-11-14 | 南京航空航天大学 | Parallel-working sine ware inverter |
| CN101447728A (en) * | 2008-12-25 | 2009-06-03 | 广东易事特电源股份有限公司 | Synchronous pulse-sending method and system thereof for UPS parallel machine |
| CN104362874A (en) * | 2014-10-28 | 2015-02-18 | 许继电气股份有限公司 | Method for restraining ring current of modularized photovoltaic inverter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110912228A (en) * | 2019-12-02 | 2020-03-24 | 科华恒盛股份有限公司 | Charge and discharge control method, charge and discharge control device and UPS |
| CN110912228B (en) * | 2019-12-02 | 2021-08-10 | 科华恒盛股份有限公司 | Charge and discharge control method, charge and discharge control device and UPS |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110190658A (en) | Use the vehicle-mounted DC charging circuit of traction drive component | |
| US8537581B2 (en) | Power converter system and methods of operating a power converter system | |
| CN107404144A (en) | Solar cell system | |
| US9190848B2 (en) | Parallel linkage for generators | |
| WO2013097821A1 (en) | Electric automobile and outside power supply system thereof | |
| CN201388079Y (en) | Hybrid electric vehicle charger | |
| US9327605B2 (en) | Method for charging a traction battery using a three phase source | |
| CN104488161A (en) | Attenuation circuit for an energy storage device and method for attenuating oscillations of the output current of an energy storage device | |
| CN108565959A (en) | A kind of Service Battery charging controller and method for caravan power supply | |
| CN209479442U (en) | Vehicle, power battery charging device and DC charging protect system | |
| CN105490363A (en) | Vehicle-mounted bidirectional charger and electric vehicle | |
| KR20160038348A (en) | Device for low voltage dc-dc converter-integrated charger | |
| CN109698630A (en) | Current equalizing method, device, inversion system and the wireless charging system of inverter | |
| CN106253453A (en) | Uninterrupted power source and using method | |
| CN102244498B (en) | Power generating unit driver, power generating unit and energy output equipment in power grid | |
| KR20130133801A (en) | System for coupling at least one dc source to a controllable energy store and associated operating method | |
| CN107658900B (en) | Photovoltaic grid-connected system | |
| US9768617B2 (en) | Power management system comprising a power source, a source of renewable energy, and a power converter | |
| CN106374550A (en) | Electric vehicle charging system and charging control method thereof | |
| CN104124743B (en) | Storage battery charging device | |
| US9948095B2 (en) | Combined control of two voltage sources | |
| CN211151538U (en) | Multi-source power supply device applied to common alternating current-direct current bus | |
| CN105703688B (en) | Prevent the control method that inverter is in a saturated state | |
| Bertoluzzo et al. | Design considerations for fast AC battery chargers | |
| CN115708289A (en) | Power supply system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170201 |