CN104362720B - Storage battery charging system - Google Patents
Storage battery charging system Download PDFInfo
- Publication number
- CN104362720B CN104362720B CN201410513271.7A CN201410513271A CN104362720B CN 104362720 B CN104362720 B CN 104362720B CN 201410513271 A CN201410513271 A CN 201410513271A CN 104362720 B CN104362720 B CN 104362720B
- Authority
- CN
- China
- Prior art keywords
- circuit
- rectification
- voltage
- signal
- inverter
- 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.)
- Active
Links
- 230000008859 change Effects 0.000 claims description 31
- 230000005611 electricity Effects 0.000 claims description 26
- 238000002955 isolation Methods 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 description 11
- 230000006872 improvement Effects 0.000 description 8
- 238000001514 detection method Methods 0.000 description 5
- 238000012360 testing method Methods 0.000 description 5
- 230000033228 biological regulation Effects 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 230000004044 response Effects 0.000 description 4
- 241000272470 Circus Species 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000036772 blood pressure Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- H02J7/022—
-
- H02J7/027—
Abstract
A storage battery charging system comprise a first rectifying circuit, an inverter circuit connected with the first rectifying circuit, a voltage isolating circuit connected with the inverter circuit, a second rectifying circuit connected with the voltage isolating circuit, an electric quantity detecting circuit connected with the first rectifying circuit and the inverter circuit, and a control circuit connected with the first rectifying circuit, the electric quantity detecting circuit and the inverter circuit. The control circuit is used for generating a rectifying control signal according to the voltage at the input end and the output end of the first rectifying circuit so as to control the rectifying circuit to output corresponding direct currents and is used for generating an inverting control signal so as to control the inverter circuit to generate corresponding alternating currents. The system is low in noise and size, and safety and reliability are increased by controlling the first rectifying circuit and the inverter circuit.
Description
Technical field
The present invention relates to field of power electronics, specifically, it is related to a kind of battery charging system.
Background technology
A kind of widely used battery charging system, using simply phased direct rectification form, leads to control accuracy
Not high, output voltage fluctuation is big, ripple is big, and input voltage and output voltage do not have electrical isolation, poor stability.In order to overcome this
A little problems, commonly used transformator first carries out blood pressure lowering to industrial-frequency alternating current, then carries out rectification to the alternating current after blood pressure lowering, so
Although solving the problems, such as electrical isolation, transformator has that volume is big, heavier shortcoming leads to a whole set of charging system integrated level low,
And transformator can produce larger power frequency noise.Other, some fields are to the safety of battery charging system and reliability
The requirement also more and more higher of property.
Content of the invention
For the problems referred to above, a kind of battery charging system, comprising:
First rectification circuit, it is used for the first AC conversion of input is become the first unidirectional current and exported；
Inverter circuit, it is connected with described first rectification circuit, for described first unidirectional current is converted into the second exchange
Electricity simultaneously exports；
Voltage isolation circuit, it is connected with described inverter circuit, for described second alternating current is carried out voltage isolation, obtains
To the 3rd alternating current and export；
Second rectification circuit, it is connected with described voltage isolation circuit, for described 3rd alternating current is converted into second
Unidirectional current, charges for accumulator；
Electric quantity detecting circuit, it is connected with described first rectification circuit and inverter circuit, for detecting described first rectification
Circuit input end and the voltage of outfan, and the electric current of described inverter circuit input and outfan；
Control circuit, it is connected with described first rectification circuit, electric quantity detecting circuit and inverter circuit, for according to described
The voltage of the first rectification circuit input end and outfan produces rectification control signal, to control described first rectification circuit output to need
The first unidirectional current wanted, is additionally operable to the electric current according to described inverter circuit input and outfan and produces inverter control signal, with
Described inverter circuit is controlled to produce the second alternating current needing.
In a specific embodiment, described first rectification circuit includes:
Rectification triggering circuit, it is connected with described control circuit, for being touched according to the rectification in described rectification control signal
Signal and produce trigger pulse, stop producing trigger pulse according to the rectification stop signal in described rectification control signal；
Half-controlling bridged rectifier circuit, it is connected with described rectification triggering circuit, for will be described according to described trigger pulse
First alternating current is converted to described first unidirectional current；
Buffer circuit, it is connected in parallel on the two ends of the outfan of described half-controlling bridged rectifier circuit, for reducing described half control
The voltage jump of the outfan of bridge rectifier.
In a specific embodiment, described half-controlling bridged rectifier circuit includes:
Multiple IGCTs, the negative electrode of described some IGCTs as the output head anode of described half-controlling bridged rectifier circuit,
Or the anode of described some IGCTs is as the negative pole of output end of described half-controlling bridged rectifier circuit.
In a specific embodiment, described first rectification circuit also includes:
Pre-charge circuit, it is connected to the input of described half-controlling bridged rectifier circuit and by described some IGCT structures
The output head anode becoming or negative pole of output end, for entering line precharge to described buffer circuit.
Precharge triggers circuit, it is connected with described control circuit, for according to the preliminary filling in described rectification control signal
Electric trigger, controls described pre-charge circuit to enter line precharge to described buffer circuit, according in described rectification control signal
Precharge stop signal, control described pre-charge circuit to stop precharge；
In a specific embodiment, when described precharge triggers circuit normal when, described precharge triggers circuit to
Described control circuit sends preliminary filling electrical feedback signal；
When described rectification triggering circuit is normal, described rectification triggering circuit sends rectified feedback letter to described control circuit
Number.
In a specific embodiment, whether described control circuit judges the input terminal voltage of described first rectification circuit
Normally, if normally, send described precharge trigger to described precharge triggers circuit, otherwise send precharge and stop
Signal；
If after sending described precharge trigger, described control circuit does not receive described preliminary filling electrical feedback signal,
Then send precharge stop signal to described precharge triggers circuit；
Described control circuit receives preliminary filling electrical feedback signal and the output end voltage of described first rectification circuit is detected
After reaching preset charged threshold value, send rectifier and trigger signal to described rectification triggering circuit, to control described rectification triggering circuit
Carry out rectification；
If after sending rectifier and trigger signal, described control circuit does not receive described rectified feedback signal, then to described
Rectification triggering circuit sends rectification stop signal.
In a specific embodiment, described control circuit judges input and/or the output electricity of described inverter circuit
Whether exceed default power threshold, if it does, then sending rectification stop signal.
In a specific embodiment, what described inverter circuit included being connected in parallel on the series connection at its input two ends first changes
To electric capacity and the second Change phase capacitance, wherein, described electric quantity detecting circuit is connected with the first Change phase capacitance, to detect that described first changes
Voltage to electric capacity two ends.
In a specific embodiment, described control circuit judges described first Change phase capacitance and the second Change phase capacitance
Whether magnitude of voltage sum exceedes predetermined voltage range, if it does, then sending rectification stop signal,
In a specific embodiment, described control circuit calculates the voltage of the first Change phase capacitance and the second Change phase capacitance
Difference, and described difference absolute value exceed predeterminated voltage difference after, to described first rectification circuit send rectification stop
Signal.
In a specific embodiment, described inverter circuit is according to the inversion triggering letter in described inverter control signal
Number, produce described second alternating current, according to the inversion stop signal in described inverter control signal, stop producing described second friendship
Stream electricity.
In a specific embodiment, described inverter circuit includes:
Inverter trigger circuit, it is connected with described control circuit, for according to the inversion triggering letter in inverter control signal
Number produce drive signal, according to the inversion stop signal in inverter control signal, stop producing drive signal；
Half-bridge inversion circuit, it is connected with described first rectification circuit and inverter trigger circuit, for according to described driving
Described first unidirectional current is converted to described second alternating current by signal.
In a specific embodiment, described control circuit judges twice and the institute of the input current of described inverter circuit
State the predetermined current the difference whether absolute value of the difference of inverter circuit output current is more than, if it is, send inversion stopping
Signal.
In a specific embodiment, it is default that described control circuit judges that described inverter circuit output current value exceedes
After current threshold, send inversion stop signal to described inverter circuit.
The just direct rectification of electrical network alternating current power supply of first rectification circuit of the present invention is the first smoother unidirectional current, inversion
First DC inverter is the second higher alternating current of frequency by circuit, because the frequency of the second alternating current is higher, both may be used
To carry out electrical isolation with the voltage isolation circuit of small volume, also make noise produced by voltage isolation circuit smaller.
Other, control circuit is according to the voltage of the first rectification circuit input end and outfan and inverter circuit input and outfan
Electric current to adjust the first unidirectional current and the second alternating current respectively so that the curtage that bears of this system components is in safety
Scope, to lift the safety and reliability of this system.
Other features and advantages of the present invention will illustrate in the following description, and, partly become from description
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by description, rights
In claim and accompanying drawing, specifically noted structure is realizing and to obtain.
Brief description
Hereinafter will be based on embodiment and refer to the attached drawing is being described in more detail to the present invention.Wherein:
Fig. 1 is the circuit diagram of the battery charging system of one embodiment of the present invention.
Fig. 2 is the schematic diagram of the first rectification circuit of the battery charging system of one embodiment of the present invention.
In the accompanying drawings, identical part uses identical reference.
Specific embodiment
Below in conjunction with accompanying drawing, the invention will be further described.Fig. 1 is that the accumulator of one embodiment of the present invention is filled
The circuit connection diagram of electric system.In the present embodiment, battery charging system includes main circuit and control circuit.Main electricity
Road includes, for the first AC conversion of input is become the first unidirectional current the first rectification circuit exporting, being connected to first whole
Current circuit and the inverter circuit for the first unidirectional current is converted into the second alternating current, are connected to inverter circuit and are used for second
Alternating current and is converted into the voltage isolation circuit of the 3rd alternating current after electrical isolation, is connected to voltage isolation circuit and for will
The second rectification circuit of the second direct current electricity output changed by 3rd alternating current, is connected to the second rectification circuit and is used for the second direct current
Electricity is filtered and exports the filter circuit of accumulator.Concrete connected mode is as follows:
Fig. 2 schematically show the first rectification circuit.Corresponding to Fig. 1 as can be seen that terminal u1, v1, w1 are respectively right
Should be in the input of current-limiting resistance r3, r2, r1, trigger terminal u2, v2, w2 correspond respectively to the normally opened of relay 26,27,28 and touch
Point, charging terminal 21 corresponds to the normally opened contact of relay 29, controls and feedback end 22 corresponds to precharge control end 401, pre-
Charging feedback receiving terminal 402, rectifier and trigger control end 403, rectifier and trigger feedback reception end 404.In the present embodiment, first is whole
Current circuit includes half-controlling bridged rectifier circuit 1.Half-controlling bridged rectifier circuit 1 includes 11～13,3 diodes 14 of 3 IGCTs
～16, the negative electrode of IGCT 11～13 links together and constitutes the output anode d1 of half-controlling bridged rectifier circuit 1, and diode 14～
16 anode links together and constitutes the output cathode d2 of half-controlling bridged rectifier circuit 1.The anode of each IGCT with each two
The negative electrode of pole pipe is corresponding to be connected, i.e. 11 in reference and 14,12 and 15, and 13 are connected with each other with 16.Diode and IGCT
Connecting place is respectively three-phase input port u, v, w of battery charging system, input port u, v, w external three phase supply electrical network.
The gate pole of IGCT 11～13 is connected to trigger terminal u2, v2 of the first triggers circuit 2, w2.Diode and IGCT
The electric current that one-way conduction characteristic limits three phase network conveying can only flow to anode d1, so half-controlling bridged rectifier circuit 1 energy will be defeated
The three-phase alternating current entering battery charging system changes into direct current output.First triggers circuit 2 is whole with current limliting in triggering port u2
The forward voltage exceeding IGCT threshold values is added, then IGCT 11 turns on, and otherwise IGCT 11 disconnects between flow port u1.In the same manner,
The conducting of IGCT 12,13 and disconnection are also to be controlled by the first triggers circuit 2.The controllable conduction characteristic of IGCT determines half control
The conducting of bridge rectifier 1 and disconnection are controlled.
In the present embodiment, the first rectified current also includes the first triggers circuit 2.First triggers circuit 2 includes connecting respectively
It is connected to the current-limiting resistance r1～r3 of three-phase input port w, v, u, anode is connected respectively in current-limiting resistance r1～r3 other end
Diode 23～25, movable contact is connected to the relay 28～26 of diode 23～25 negative electrode, and movable contact connects
In the normally-closed contact of relay 28～26 and normally opened contact is connected to the output anode d1 relay of half-controlling bridged rectifier circuit 1
29.Coil one end of relay 29 is grounded gnd, the other end connects the precharge control end 401 of control circuit 4, relay 29
The normally closed feedback signal output of coil connects the precharge feedback reception end 402 of control circuit 4.The coil of relay 26～28
One end is grounded gnd, the other end connects the rectifier and trigger control end 403 of control circuit 4, the coil of relay 26～28 normally closed anti-
Feedback signal outfan connects the rectifier and trigger feedback reception end 404 of control circuit 4, and the normally opened contact of relay 26～28 connects respectively
It is connected to the gate pole of IGCT 11～13.
Control circuit 4 sends electric current to relay 29 from precharge control end 401, the normally opened contact of relay 29 with
Movable contact close, external three-phase alternating current after r1～r3 current limliting and diode 23～25,14～15 rectifications, to Support Capacitor
Line precharge is entered in 36.After the normally opened contact of relay 29 and movable contact normally closed, send to precharge feedback reception end 402
Normally-closed contact feeds back signal, feeds back preliminary filling electrical feedback signal to control circuit 4.Control circuit 4 is from rectifier and trigger control end 403
Send an electric current to relay 26～28, the normally opened contact of relay 26～28 is closed with movable contact, stops precharge, and to
The IGCT 11～13 of half-controlling bridged rectifier circuit 2 sends trigger pulse, and half-controlling bridged rectifier circuit 2 starts the three-phase of input
AC rectification.After the normally opened contact of relay 26～28 and movable contact normally closed, send to precharge feedback reception end 404
Normally-closed contact feeds back signal, feeds back rectified feedback signal to control circuit 4.Brilliant lock can be avoided to Support Capacitor 36 precharge
Pipe and diode are opened, because of IGCT, the current break leading to and IGCT and diode are damaged.Support Capacitor 36 is as half-bridge
Inverter circuit 3 and the buffer circuit of half-controlling bridged rectifier circuit 1.
In the present embodiment, inverter circuit includes half-bridge inversion circuit 3.Half-bridge inversion circuit 3 includes two ends and connects respectively
Anode d1, the Support Capacitor 36 at negative electrode d2 end, two Change phase capacitances 37,38 in parallel with Support Capacitor 36, collection after two series connection
Igbt 32 (igbt is the abbreviation of insulated gate bipolar transistor), emitter stage and negative electrode d2 end that electrode is connected with anode d1 end
Connect and igbt 33 that colelctor electrode is connected with the emitter stage of igbt 32, negative electrode connect with the colelctor electrode of igbt 32 and anode with
The diode 34 that igbt 32 emitter stage connects, negative electrode is connected with the colelctor electrode of igbt 33 and anode and igbt 33 emitter stage phase
The diode 35 connecing, and the first terminal of the first driving pulse output interface and Second terminal connect the door of igbt 32 respectively
The first terminal of pole and emitter stage and the second driving pulse output interface and Second terminal connect the gate pole of igbt 33 respectively and send out
The gate trigger circuit 31 of emitter-base bandgap grading.Two electric capacity 37,38 connected ends, two igbt 32,33 connected ends constitute inverter circuit 3
Two lead-out terminals, this two lead-out terminals are connected respectively on high-tension side two terminals of transformator t1.
Gate trigger circuit 31 can export between the first terminal of the first driving pulse output interface and Second terminal
First driving pulse of the positive and negative space changing of a cycle, the numerical value a of the voltage of this driving pulse threshold values more than igbt 32
Numerical value b.The time that first driving pulse output interface exports positive voltage in a cycle is less than or equal to output negative voltage
Time, being output as positive voltage is then conducting igbt 32, is output as during negative voltage then ending igbt 32, conducting in a cycle
Time is less than or equal to deadline.Defeated between the first lead-out terminal of the second driving pulse output interface and the second lead-out terminal
Go out identical with the first drive pulse shape but difference half period on the time second driving pulse, the second driving pulse is
Igbt33 is turned on during positive voltage.So driving pulse turns on two igbt in turn, and ends another when turning on an igbt
Igbt is so that two turn to an electric capacity 37,38 alternately electric discharge of charging, each Change phase capacitance 37,38 two ends simultaneously
Voltage is continually changing, so that the output port output single-phase alternating current of inverter circuit 3.Preferably, this driving pulse is square
Shape ripple, a that b is more than 1.5 times to 3 times, so chooses and is advantageous in that driving pulse can turn on igbt rapidly, make transformer high-voltage
The input voltage of side tends to square wave.When the dutycycle of two driving pulses of adjustment can adjust the conducting of igbt in a cycle
Between, and then adjust the on high-tension side input voltage of transformator t1.
In the present embodiment, transformator t1 is by the voltage step-down of the single-phase alternating current of the output of inverter circuit 3.If voltage device
The input voltage of t1 is higher, then the voltage of the single-phase alternating current of its output is higher.
In the present embodiment, the second rectification circuit includes single phase bridge type rectifier circu 5.Single phase bridge type rectifier circu 5 includes 4
Individual 51～54,4 diodes 51～54 of diode are divided into two groups, and the negative electrode of first group of diode 51,53 links together composition
The output HV Terminal of single phase rectifier circuit 5, the anode of second group of diode 52,54 links together composition single phase rectifier circuit
5 output low-voltage terminal, the anode of first group of each diode is corresponding with the negative electrode of second group of diode one by one to be connected, that is,
In reference 51 are corresponding with 54 with 52,53 to be connected, first group of diode and second group of diode connecting place respectively with transformation
Two ports of device t1 low-pressure end connect.The characteristic of diode one-way conduction defines that the electric current of the output of transformator t1 can only flow
To HV Terminal, so the single-phase alternating current of input can be converted into direct current electricity output by single phase bridge type rectifier circu 5.
In the present embodiment, filter circuit 6 is the type of falling l filter circuit.Output high-pressure side series connection in single phase rectifier circuit 5
One inductance 61 constitutes the output anode dc1 of this battery charging system.The low-voltage output of single phase rectifier circuit 5 constitutes this storage
The output cathode dc2 of batter-charghing system.It is connected an electric capacity 62 between output anode dc1 and output cathode dc2.When flowing through electricity
During the curent change of sense l2, the induced electromotive force producing in inductance coil will stop the change of electric current.When by inductance coil
When electric current increases, the self induction electromotive force that inductance coil produces is contrary with the sense of current, stops the increase of electric current, simultaneously by a part
Electric energy changes into magnetic field energy and is stored among inductance.When the electric current by inductance coil reduces, self induction electromotive force and electric current side
To identical, stop the reduction of electric current, discharge the energy of storage, to compensate the reduction of electric current simultaneously.Therefore after inductor filter,
Not only the pulsation of load current and voltage reduces, and waveform is smoothened, and the leading of diode 51～54 in single phase rectifier circuit 5
Current flow angle increases, and remaining a small amount of alternating component is again through capacitor filtering below, weakened further.
The anode dc1 of battery charging system connects the positive pole of accumulator battery 7, and the negative electrode dc2 of battery charging system is even
Connect the negative pole of accumulator battery 7.
In the present embodiment, control circuit 4 includes logic controller 41, pwm pulse generator 42, voltage collector circuit
43.
Voltage collection circuit 43 is to the input voltage of half control bridge rectifier 1, the voltage of Change phase capacitance 37, Change phase capacitance
38 voltage carries out magnitude of voltage information gathering, and by magnitude of voltage information input to logic controller 41.Specifically, voltage acquisition electricity
The high_voltage isolation that carries out to collected circuit for the road 43, then the mould describing this circuit voltage information will be obtained after voltage transformation
Intend signal, finally this analogue signal is converted to digital signal and is sent to logic controller 41.The half-controlling bridged rectifier collecting
The input voltage a of circuit 1, the voltage b of Change phase capacitance 37, the voltage c of Change phase capacitance 38.
Pwm pulse generator 42 produces trigger and controls gate trigger circuit 31.When pwm pulse generator 42 receives
After the inversion trigger that logic controller 41 sends, send lasting pulse signal to gate trigger circuit 31.When pwm pulse
Generator 42 stops producing pulse signal after receiving the inversion stop signal that logic controller 41 sends.Gate trigger circuit 31
While receiving this pulse signal, produce the first driving pulse and the second driving pulse to drive half-bridge inversion circuit 33 work
Make.Gate trigger circuit 31 then do not produce the first driving pulse and the second driving pulse after being not received by pulse signal so that
Two igbt of half-bridge inversion circuit 33 stop conducting, limit the current value between igbt colelctor electrode and emitter stage, thus protecting
Igbt be unlikely to because by electric current excessive and damage.
Logic controller 41 is connected to and is arranged on half-bridge inversion circuit 3 input for detecting the defeated of half-bridge inversion circuit 3
Enter the first current acquisition element sc1 of electric current c, be arranged on half-bridge inversion circuit 3 outfan and be used for detecting that half-bridge inversion circuit 3 is defeated
Go out the second current acquisition element ta of the current value d at end.Preferably, the second current acquisition element ta is quick response transformer,
The response time of detection high voltage side of transformer average current is less than 10 μ s.Logic controller 41 is used for receiving voltage Acquisition Circuit
42nd, all kinds of information about power that the first current acquisition element sc1 and the second current acquisition element ta collects, and according to predetermined control
Processing procedure ordered pair execution circuit is directly or indirectly controlled.Control flow is as follows:
After three-phase input port u, v, w access three phase network, voltage collection circuit 43 transmits half control to logic controller 41
The input voltage value a of bridge rectifier.Logic controller 41 judges that this voltage is not then moved further in normal range
Make.Logic controller 41 judges that this voltage then sends precharge trigger to switch and feedback circuit within normal range.The
One triggers circuit 2 charges to Support Capacitor 36 and sends to logic controller 41 after receiving precharge trigger and is pre-charged instead
Feedback signal.
Logic controller 41 judges the normally opened contact of the relay 29 in the first triggers circuit 2 according to preliminary filling electrical feedback signal
Whether close with movable contact.If the normally opened contact of relay 29 is not closed with movable contact, send preliminary filling to switch and feedback circuit
Electric stop signal.If the normally opened contact of relay 29 is closed with movable contact, the output voltage of detection half-controlling bridged rectifier circuit 1
Value (i.e. the value at Support Capacitor 36 two ends) whether reach preset value.If the voltage of Support Capacitor 36, reach preset value and then send
Precharge stop signal, rectifier and trigger signal and inversion trigger.If Support Capacitor 36 be not reaching to preset value, to
First triggers circuit 2 sends precharge stop signal.
When the input voltage value that logic controller 41 judges half-controlling bridged rectifier circuit 1 was not then carried out within normal range
Charge, so can avoid battery charging system by too high voltage breakdown.When logic controller 41 judged result is relay
When the normally opened contact of device 29 is not closed with movable contact, the first triggers circuit 2 is damaged it is necessary to terminate charging to protect accumulator.When
When logic controller 41 judges that the voltage of Support Capacitor 36 does not reach preset value, then half-controlling bridged rectifier circuit 1 or inversion electricity
Road 3 is damaged, and terminates charging to protect accumulator.
For the improvement further of this invention, the input of the half-controlling bridged rectifier circuit 1 that voltage collection circuit 43 collects
Voltage a, the voltage b of Change phase capacitance 37, the voltage of Change phase capacitance 38 is c, and control circuit 41 judges the voltage of described Change phase capacitance
Whether value sum exceedes predetermined voltage range, if it does, then sending rectification stop signal, predetermined voltage range includes [(1-
a)·b·uin, (1+a) b uin], wherein a and b represents coefficient, uinRepresent the virtual value of the first rectification circuit input voltage.
Wherein a and b represents positive coefficient, wherein a≤1, uinRepresent the virtual value of the first rectification circuit input voltage.The span of a is
[0,0.3], the span of b is [1.2,1.5].Those skilled in the art can be according to the pressure-bearing of the element forming this system
Choosing the concrete numerical value of a, a represents the bearing capacity to voltage for this system to ability.B represents that the first rectification circuit records input electricity
The RMS-DC converter of pressure is the error of the crest voltage of input voltage.
In theory, 1.4 times of the input voltage value of half-controlling bridged rectifier circuit 1 are equal to the electricity of two Change phase capacitances 37,38
Pressure value sum, but have certain deviation in practical application.Two are changed capacitance voltage sum and exceed or be less than the first rectified current
The preset value of road input voltage, then IGCT 11～13 job failure or the first triggers circuit 2 failure exception, logic controller 41
Send rectification stop signal to the first triggers circuit 2 and send inversion stop signal to pwm pulse generator 42 so that main circuit
Quit work, play a protective role.
For the improvement further of this invention, logic controller 41 compares the magnitude of voltage on two Change phase capacitances 37,38, it
Difference absolute value exceed predeterminated voltage difference after, logic controller 41 to the first triggers circuit 2 send rectification stop signal and to
Pwm pulse generator 42 sends inversion stop signal so that main circuit quits work, and the scope of predeterminated voltage difference is 5～
30v.
Ac200v/30hz～ac500v/90hz input voltage is changed in the application of dc74v output, two Change phase capacitances
37th, to be less than during a certain value then system normal for the absolute value of the voltage difference on 38, those skilled in the art can according to actual should
Predeterminated voltage difference is selected in the range of 5v～30v.Two Change phase capacitances 37, the absolute values of 38 difference in voltage exceed default electricity
After pressure difference, component wear in 37,38 or two igbt 32,33 of two Change phase capacitances or gate trigger circuit, at this moment logic
Controller 41 sends rectification stop signal to the first triggers circuit 2 and sends inversion stop signal to pwm pulse generator 42, makes
Obtain main circuit to quit work, play a protective role.
For the improvement further of this invention, logic controller 41 compares the input average current value of half-bridge inversion circuit 33
The average current d of the output of c and half-bridge inversion circuit 33, the twice of the input current of half-bridge inversion circuit 33 and described inversion electricity
The preset value that the absolute value of the difference of road output current is more than, logic controller 41 sends rectification to the first triggers circuit 2 to be stopped
Signal simultaneously sends inversion stop signal so that main circuit quits work to pwm pulse generator 42.Wherein inverter circuit output electricity
The preset value of stream by can be calculated by formula (1),
i1=e × iout(1)
In formula (1):
i1For the preset value of half-bridge inversion circuit output current, unit is ampere；
E is constant, and selected scope is 0.1～0.3；
ioutFor inverter circuit output current value, unit is ampere.
In theory, input average current value c of half-bridge inversion circuit 33 is the output average current d of half-bridge inversion circuit 33
Twice, but have certain deviation in practical application.The twice of the input current of half-bridge inversion circuit 33 exceeds or is less than
It is likely that igbt 32,33 can be punctured after the preset value of half-bridge inversion circuit output current, at this moment need in the electricity through igbt
The impedance puncturing increase igbt before peak value arrives of stream.It is 10% that those skilled in the art can select e according to practical application
Certain numerical value in the range of～30%.So sending inversion stop signal to pwm pulse generator 42, forbid that pwm pulse 42 is produced
Raw device produces trigger to gate trigger circuit 31, it is to avoid igbt damages.Other, the output of detection half-bridge inversion circuit 33
The response time of electric current d is less than 10 μ s, directly pass through logic controller, pwm pulse generator 42, gate trigger circuit 31 logical
Road completing, than being detected using software and protection shortens response time so that igbt is effectively protected.
For the improvement further of this invention, in triggering stage, the output to half-bridge inversion circuit 33 for the logic controller 41
Electric current d and predetermined threshold value are compared, if exceeding its predetermined threshold value, send rectification stop signal simultaneously to the first triggers circuit 2
Send inversion stop signal to pwm pulse generator.
Igbt is usually excessive and breakdown because of electric current, needs to limit the current value of igbt, that is, need to limit semi-bridge inversion electricity
Output current d on road 33 is so as to be less than the breakdown potential flow valuve of igbt.At this moment one breakdown potential flow valuve being less than igbt of setting is pre-
If threshold value, the system of charging a battery leaves amount of redundancy, when output current d of half-bridge inversion circuit 33 exceedes its limit value,
Logic controller 41 sends inversion stop signal to pwm pulse generator, increases the impedance of igbt, thus protecting igbt not hit
Wear.
In the present embodiment, control circuit 4 also includes closed loop priority pid controller 44.Pwm pulse generator 42 also connects
Receive the inversion pressure regulation signal that closed loop priority pid controller 44 sends, inversion pressure regulation signal is used for adjusting pwm pulse generator 42
The width of the pulse signal sending is controlling accounting for of the first driving pulse that gate trigger circuit 31 sends and the second driving pulse
Empty ratio, thus adjusting the output voltage of half-bridge inversion circuit 3, and then the output voltage of adjustment the second rectification circuit 5, and then adjust
The output current of filter circuit 6, output voltage.
In the present embodiment, closed loop priority pid controller 44 is connected to electric quantity detecting circuit, pwm pulse generator 42
And logic controller 41.The outfan that electric quantity detecting circuit includes being arranged in filter circuit 6 is defeated for detection filter circuit 6
Go out the 3rd current acquisition element sc2 of electric current, and be connected to filter circuit 6 outfan and export electricity for detection filter circuit 6
The testing circuit of pressure.
Closed loop priority pid controller 44 is used for presetting the output voltage of filter circuit 6, this two parameters of output current
Predetermined target value, periodically compares this two parameters and its predetermined target value.If all without departing from its predetermined target value, not entering
Revise link, otherwise select one of them not to be modified and beyond the maximum parameter of the numerical value of its predetermined target value in the upper cycle
Enter the correction link in this cycle.Revising link is that closed loop priority pid controller 44 surpasses according to entering the parameter revising link
The degree going out its predetermined target value sends pressure regulation signal to pwm pulse generator 42.Pwm pulse generator 42 is according to pressure regulation signal
The width of pulse signal is reduced or increased, thus first driving pulse and second that gate trigger circuit 31 send is reduced or increased
Driving pulse dutycycle, and then be reduced or increased inverter circuit 3 output voltage so that beyond or be less than predetermined target value
Parameter predetermined target value is reduced or increased.
As a further improvement on the present invention, this system also includes being connected to the residue of closed loop priority pid controller 44
Capacity check device and temperature sensing circuit.Residual capacity testing circuit can detect the remaining capacity value of accumulator 7, and by its
It is transferred to closed loop priority pid controller 44.Temperature sensing circuit can detect the temperature value of accumulator 7, and is transmitted
To closed loop priority pid controller 44.Closed loop priority pid controller 44 can be automatic according to the remaining capacity value of accumulator 7
Calculate the predetermined target value of the output current of filter circuit 6.Closed loop priority pid controller 44 can be according to the temperature of accumulator 7
Angle value calculates the predetermined target value of the output voltage of filter circuit 6 automatically.Specific as follows:
After closed loop priority pid controller 44 receives the residual capacity data of residual capacity testing circuit transmission, will remain
Covolume amount and rated capacity are divided by, and obtain the percentage ratio that residual capacity accounts for rated capacity.Then, determined according to percent value to filter
The predetermined target value of the output current of wave circuit 6, the predetermined target value of the output current of filter circuit 6 reduces with percent value
And reduce.For example: when this percentage ratio is more than 50%, closed loop priority pid controller 44 is then by the output current of filter circuit 6
Predetermined target value be adjusted to a larger value, thus high current quick charge is carried out to accumulator 7, prevent accumulator 7 because lose
Electric overlong time and reduce the performance of accumulator 7；When this percent value is less than 50% and is more than 5%, closed loop priority pid is controlled
Device 44 processed is then adjusted to a less value the predetermined target value of the output current of filter circuit 6, thus preventing electric greatly for a long time
Current charge damages accumulator 7；When this percentage ratio is less than 5%, the predetermined target value of the output current of filter circuit 6 is reduced to
Zero, thus preventing from causing accumulator 7 to damage or hydraulic performance decline accumulator 7 overcharge.
To further improvement of the present invention, can be based on the remaining electricity of accumulator 7 on closed loop priority pid controller 44
The accumulator 7 that the output current of appearance and filter circuit 6 is variable optimal charge curvilinear equation, residual capacity testing circuit detects
Residual capacitance calculate filter circuit 6 output current predetermined target value.Inventor finds, accumulator 7 has with electric power storage
The residual capacity in pond 7 be independent variable, with the output current of filter circuit 6 as dependent variable and filter circuit 6 output current with
The residual capacity of accumulator 7 reduces and reduces and continually varying optimal charge curve.If the output current of filter circuit 6 is pressed
This curvilinear motion is it is possible to greatly shorten the charging interval, and the capacity and life-span of battery is not also affected.This area
Technician can test to accumulator 7, simulates this optimal charge curvilinear equation.
When the temperature that closed loop priority pid controller 44 detects accumulator 7 is less than preset temperature, closed loop priority
Pid controller 44 improves the predetermined target value of the output voltage of filter circuit 6.When closed loop priority pid controller 44 detects
When the temperature of accumulator 7 is higher than preset temperature, closed loop priority pid controller 44 reduces the pre- of the output voltage of filter circuit 6
If desired value.The predetermined target value setting upper safety limit of the output voltage to filter circuit 6 for the closed loop priority pid controller 44,
No longer improve the predetermined target value of the output voltage of filter circuit 6, to keep away when dropping to a certain degree at a temperature of accumulator 7
Exempt from the damage of other components and parts of this system.
This preset temperature is generally rated temperature.For example, when this preset temperature value is 25 DEG C.Reduce with ambient temperature,
The electrolyte flow of accumulator 7 reduces, and combination reaction slows down, and when ambient temperature is less than 25 DEG C, so that accumulator 7 capacity is difficult to
Reach rated capacity.When ambient temperature is higher than 25 DEG C, accumulator 7 capacity high rated capacity, accumulator 7 is charged
When, quite a few charging current is converted into heat energy, so that accumulator 7 internal temperature is aggravated, causes vicious cycle, cause accumulator
7 damages.Too high temperature can lead to stream increase of charging, due to overcharging the accumulation of electricity, so that the contracting of accumulator 7 cycle life
Short.Have been demonstrated, when ambient temperature is at 25 DEG C, temperature often raises 6～10 DEG C, accumulator 7 lost of life half.With electric power storage
The temperature change in pond 7 adjusts the charging voltage (i.e. the output voltage of filter circuit 6) of accumulator 7, can avoid overcharging of battery
Electricity and charge less electricity, extend accumulator 7 life-span.Those skilled in the art can record under preset temperature single accumulator 7
Good charging piezoelectricity value.
As a further improvement on the present invention, closed loop priority pid controller 44 set filter circuit 6 output current,
The predetermined threshold value of the output current of output voltage and filter circuit 6, closed loop priority pid controller 44 is periodically relatively more fixed
The output current of the output current of filter circuit 6, output voltage and filter circuit 6 and its threshold value, when any of which item exceedes
Its predetermined threshold value then sends stop signal to logic controller 41, and logic controller 41 is according to stop signal to the first triggers circuit
2 send rectification stop signal and send inversion stop signal so that main circuit quits work to pwm pulse generator 42, thus
Battery charging system and accumulator 7 are protected.
Although by reference to preferred embodiment, invention has been described, in the situation without departing from the scope of the present invention
Under, it can be carried out with various improvement and element therein can be replaced with equivalent.Especially, as long as there is not conflict,
The every technical characteristic being previously mentioned in embodiment all can combine in any way.The invention is not limited in disclosed herein
Specific embodiment, but include all technical schemes falling within the scope of the appended claims.
Claims (13)
1. a kind of battery charging system, comprising:
First rectification circuit, it is used for the first AC conversion of input is become the first unidirectional current and exported；
Inverter circuit, it is connected with described first rectification circuit, for described first unidirectional current is converted into the second alternating current simultaneously
Output；
Voltage isolation circuit, it is connected with described inverter circuit, for described second alternating current is carried out voltage isolation, obtains
Three alternating currents simultaneously export；
Second rectification circuit, it is connected with described voltage isolation circuit, for described 3rd alternating current is converted into the second direct current
Electricity, charges for accumulator；
Electric quantity detecting circuit, it is connected with described first rectification circuit and inverter circuit, for detecting described first rectification circuit
Input and the voltage of outfan, and the electric current of described inverter circuit input and outfan；
Control circuit, it is connected with described first rectification circuit, electric quantity detecting circuit and inverter circuit, for according to described first
The voltage of rectification circuit input end and outfan produces rectification control signal, to control described first rectification circuit output to need
First unidirectional current, is additionally operable to the electric current according to described inverter circuit input and outfan and produces inverter control signal, to control
Described inverter circuit produces the second alternating current needing,
Described first rectification circuit includes:
Rectification triggering circuit, it is connected with described control circuit, for according to the rectifier and trigger letter in described rectification control signal
Number produce trigger pulse, according in described rectification control signal rectification stop signal stop produce trigger pulse；
Half-controlling bridged rectifier circuit, it is connected with described rectification triggering circuit, for according to described trigger pulse by described first
Alternating current is converted to described first unidirectional current；
Buffer circuit, it is connected in parallel on the two ends of the outfan of described half-controlling bridged rectifier circuit, for reducing described half-controlled bridge type
The voltage jump of the outfan of rectification circuit.
2. the system as claimed in claim 1 is it is characterised in that described half-controlling bridged rectifier circuit includes:
Multiple IGCTs, the negative electrode of some described IGCTs as the output head anode of described half-controlling bridged rectifier circuit, if or
Do the negative pole of output end as described half-controlling bridged rectifier circuit for the anode of described IGCT.
3. system as claimed in claim 2 is it is characterised in that described first rectification circuit also includes:
Pre-charge circuit, it is connected to the input of described half-controlling bridged rectifier circuit and is made up of described some IGCTs
Output head anode or negative pole of output end, for entering line precharge to described buffer circuit；
Precharge triggers circuit, it is connected with described control circuit, for being touched according to the precharge in described rectification control signal
Signal, control described pre-charge circuit to enter line precharge to described buffer circuit, according to pre- in described rectification control signal
Charging stop signal, controls described pre-charge circuit to stop precharge.
4. system as claimed in claim 3 it is characterised in that
When described precharge triggers circuit normal work, described precharge triggers circuit sends precharge to described control circuit
Feedback signal；
When described rectification triggering circuit normal work, described rectification triggering circuit sends rectified feedback letter to described control circuit
Number.
5. system as claimed in claim 4 it is characterised in that
Described control circuit judges the input terminal voltage of described first rectification circuit whether within default normal range, if
In default normal range, then send described precharge trigger to described precharge triggers circuit, otherwise send precharge
Stop signal；
If send described precharge trigger after, described control circuit does not receive described preliminary filling electrical feedback signal, then to
Described precharge triggers circuit sends precharge stop signal；
Described control circuit receives preliminary filling electrical feedback signal and the output end voltage of described first rectification circuit is detected and reach
After preset charged threshold value, send rectifier and trigger signal to described rectification triggering circuit, to control described rectification triggering circuit to carry out
Rectification；
If after sending rectifier and trigger signal, described control circuit does not receive described rectified feedback signal, then to described rectification
Triggers circuit sends rectification stop signal.
6. the system any one of Claims 1 to 5 is it is characterised in that inversion as described in the judgement of described control circuit is electric
Whether the input on road and/or output electricity exceed default power threshold, if it does, then sending rectification stop signal.
7. the system as any one of Claims 1 to 5 it is characterised in that described inverter circuit include being connected in parallel on it defeated
Enter to hold the first Change phase capacitance and second Change phase capacitance of the series connection at two ends, wherein, described electric quantity detecting circuit and the first commutation are electric
Hold, the second Change phase capacitance connects, to detect the voltage of described first Change phase capacitance, described second Change phase capacitance respectively.
8. system as claimed in claim 7 is it is characterised in that described control circuit judges described first Change phase capacitance and second
Whether the magnitude of voltage sum of Change phase capacitance exceedes predetermined voltage range, if it does, then sending rectification stop signal.
9. system as claimed in claim 7 is it is characterised in that described control circuit calculates the first Change phase capacitance and the second commutation
The difference of the voltage of electric capacity, and after the absolute value of described difference exceeds predeterminated voltage difference, send out to described first rectification circuit
Go out rectification stop signal.
10. the system as any one of Claims 1 to 5 is it is characterised in that described inverter circuit is according to described inversion control
Inversion trigger in signal processed, produces described second alternating current, stops letter according to the inversion in described inverter control signal
Number, stop producing described second alternating current.
11. systems as claimed in claim 10 are it is characterised in that described inverter circuit includes:
Inverter trigger circuit, it is connected with described control circuit, for being produced according to the inversion trigger in inverter control signal
Raw drive signal, according to the inversion stop signal in inverter control signal, stops producing drive signal；
Half-bridge inversion circuit, it is connected with described first rectification circuit and inverter trigger circuit, for according to described drive signal
Described first unidirectional current is converted to described second alternating current.
12. systems as claimed in claim 10 are it is characterised in that described control circuit judges the input electricity of described inverter circuit
The predetermined current the difference whether absolute value of the difference of the twice of stream and described inverter circuit output current is more than, if it is,
Send inversion stop signal.
13. systems as claimed in claim 11 are it is characterised in that described control circuit judges described inverter circuit output electricity
After flow valuve exceedes predetermined current threshold, send inversion stop signal to described inverter circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410513271.7A CN104362720B (en) | 2014-09-29 | 2014-09-29 | Storage battery charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410513271.7A CN104362720B (en) | 2014-09-29 | 2014-09-29 | Storage battery charging system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104362720A CN104362720A (en) | 2015-02-18 |
| CN104362720B true CN104362720B (en) | 2017-01-25 |
Family
ID=52529958
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410513271.7A Active CN104362720B (en) | 2014-09-29 | 2014-09-29 | Storage battery charging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104362720B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104638740B (en) * | 2015-02-28 | 2017-02-22 | 重庆长安汽车股份有限公司 | Charging device for electric vehicle |
| CN105529795A (en) * | 2016-01-18 | 2016-04-27 | 河南理工大学 | Inductive electric motor car charging device |
| SG11201700428UA (en) | 2016-02-05 | 2017-09-28 | Guangdong Oppo Mobile Telecommunications Corp Ltd | Charge method, adapter and mobile terminal |
| EP3276778B1 (en) * | 2016-07-26 | 2019-06-05 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Charging system, lightning protection method for terminal during charging, and power adapter |
| CN112737366B (en) * | 2020-12-29 | 2023-09-08 | 核工业西南物理研究院 | Thyristor power supply control system powered by pulse generator |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06141484A (en) * | 1991-08-09 | 1994-05-20 | Matsushita Electric Works Ltd | Charging circuit |
| CN2899242Y (en) * | 2006-03-20 | 2007-05-09 | 何茂彬 | Intelligent plumbous acid battery charger |
| CN102647006B (en) * | 2012-04-20 | 2014-11-12 | 湖北点元电子信息技术有限公司 | Charging device for lithium battery of pure electric vehicle |
-
2014
- 2014-09-29 CN CN201410513271.7A patent/CN104362720B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104362720A (en) | 2015-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205882815U (en) | A charging system and power adapter for terminal | |
| CN104362720B (en) | Storage battery charging system | |
| CN102763303B (en) | Battery protecting circuit and method for energy collecting device circuit | |
| CN105978309B (en) | It discharges the input capacitor of switched-mode power supply | |
| CN201466775U (en) | Storage battery charging and discharging device | |
| CN1407419A (en) | Compensating adjuster with reinforcing processing load current rapid attenuation ability | |
| CN109983354A (en) | Battery charger and method | |
| CN110676918A (en) | Battery switch circuit, power supply management system and method | |
| CN110112899A (en) | Drive control circuit and air conditioner | |
| CN102882204B (en) | Voltage control device of direct-current bus and working method thereof as well as voltage control system | |
| CN110073592A (en) | For the protective device of power drive system, power drive system and method for running power drive system | |
| CN104362717B (en) | A kind of battery charging system | |
| CN106374507A (en) | Three-phase common compensation intelligent synchronous switch and control protection method thereof | |
| CN103765752A (en) | DC power supply device | |
| CN102487211A (en) | Battery charging equipment | |
| CN107492878B (en) | Intelligent power module and controller of air conditioner | |
| US11349325B2 (en) | Temperature dependent current and pulse controlled charging method for a battery charger | |
| CN212708991U (en) | Vehicle-mounted charger with pre-charging and discharging functions | |
| CN205179402U (en) | IGBT's overvoltage crowbar among electromagnetic heating device and electromagnetic heating device | |
| CN109936203A (en) | A kind of air-conditioning charging circuit, charge control method and air-conditioning with the circuit | |
| CN206595888U (en) | The overvoltage crowbar of compressor control system and Switching Power Supply | |
| KR102029964B1 (en) | Apparatus for charging battery using induction current of gis enclosure | |
| CN111934407A (en) | Charging circuit and charging method for lead-acid storage battery | |
| CN117060752B (en) | Alternating current precharge control circuit and method for PWM rectifier | |
| CN209627229U (en) | Drive control circuit and air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road No. 169 Patentee after: ZHUZHOU CRRC TIMES ELECTRIC Co.,Ltd. Address before: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road No. 169 Patentee before: ZHUZH CSR TIMES ELECTRIC Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |