CN103257663A - Current adjusting circuit and circuit system with same - Google Patents
Current adjusting circuit and circuit system with same Download PDFInfo
- Publication number
- CN103257663A CN103257663A CN2012100334588A CN201210033458A CN103257663A CN 103257663 A CN103257663 A CN 103257663A CN 2012100334588 A CN2012100334588 A CN 2012100334588A CN 201210033458 A CN201210033458 A CN 201210033458A CN 103257663 A CN103257663 A CN 103257663A
- Authority
- CN
- China
- Prior art keywords
- current
- equipment
- diode
- electronic switch
- regulating circuit
- 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
Images
Abstract
Provided are a current adjusting circuit and a circuit system with the same. The current adjusting circuit is used for adjusting current flowing through a device, and the current input end and the current output end of the device are respectively connected with the current adjusting circuit and then connected with a current bus. The current adjusting circuit at least comprises a current stabilizing unit, a control unit and a current dividing unit. The control unit is used for detecting electric parameters of the device and controlling the current stabilizing unit according to a detection result. The current stabilizing unit is connected with the current bus, the device and the control unit and used for adjusting the current flowing through the device according to the detection result. The current dividing unit is connected with the device in parallel. When the intensity of the current flowing through the device is smaller than that of current of the current bus, surplus current from the current bus flows through the current dividing unit for bypass connection. By means of the circuit and the system, devices with different working currents can be connected in the same return circuit in series and can be in the optimum working state, performances of the devices can be effectively improved.
Description
Technical field
The present invention relates to circuit design field, particularly a kind of current regulating circuit and have the Circuits System of this current regulating circuit.
Background technology
Electric current must be identical in same loop, and therefore the equipment that is connected in the same loop must be so limited.So just cause the equipment of different operating electric current can't be connected in the same circuit, thus feasible its practicality that limited.
On the other hand, though with devices in series in same loop, can be owing to electric current match, and cause part or all of equipment can't be operated in optimum condition, and then influence performance and the efficient of equipment yet.Be connected on the generating set in the same loop, if electric current does not match, will cause the part generating set can't be operated in the best power point, thereby influence generated energy; Energy storage device if electric current does not match, then can influence the degree of depth that discharges and recharges of memory device, and then influences the life-span of memory device; Consumer if electric current does not match, then may cause it can't operate as normal.
Therefore, how to make the devices in series of different operating electric current in same loop, and guarantee that these equipment all are in optimum Working, just become one of those skilled in the art's problem demanding prompt solution to improve its performance and efficient.
Summary of the invention
The problem that the present invention solves provides a kind of current regulating circuit and Circuits System, makes the devices in series of different operating electric current in same loop and all is in optimum Working, with performance and the efficient that improves equipment effectively.
For addressing the above problem, the invention provides a kind of current regulating circuit, described current regulating circuit is between equipment and current bus, be used for to regulate the electric current of the equipment of flowing through, and the current input terminal of described equipment be connected with current bus again after current output terminal is connected to described current regulating circuit respectively; Described current regulating circuit comprises at least: current stabilization unit, control module and dividing cell, and described control module for detection of the electric parameter of equipment, and is controlled described current stabilization unit according to testing result; Described current stabilization unit connects current bus, equipment and control module, is used for regulating according to the testing result of described control module the electric current of the equipment of flowing through; Described dividing cell is in parallel with equipment, when the electric current of the equipment of flowing through is lower than the electric current of current bus, from the unnecessary electric current of the current bus described dividing cell by-path turn-on of flowing through.
Alternatively, described control module comprises a controller at least, and described controller comprises test side and control end, and described test side is for detection of the electric parameter of equipment, described controller is handled testing result, and regulates the electric current of the equipment of flowing through by control end control current stabilization unit.
Alternatively, described controller is handled at least testing result and comprised: described controller compares analysis to testing result, and produces corresponding pulse-modulated signal according to the comparative analysis result.
Alternatively, the test side of described controller comprises a current detecting end at least, for detection of the electric current of the equipment of flowing through.
Alternatively, the test side of described controller also comprises a voltage detecting end, for detection of the voltage of equipment.
Alternatively, described dividing cell comprises first diode at least, and the positive pole of described first diode is coupled to the current input terminal of equipment, and negative pole is coupled to the current output terminal of equipment.
Alternatively, described current stabilization unit comprises second diode, inductance and electronic switch, and an end of described electronic switch connects the positive pole of first diode, and the other end connects the negative pole of described second diode, and links to each other with an end of described inductance; The current input terminal of the other end connection device of described inductance; The current output terminal of the equal connection device in test side of the negative pole of the positive pole of described second diode, first diode and controller; The control end of described controller is controlled dutycycle and/or the switching frequency of described electronic switch.
Alternatively, described current stabilization unit comprises second diode, inductance and electronic switch, and an end of described electronic switch connects the positive pole of first diode, and the other end connects the negative pole of described second diode, and links to each other with the current input terminal of equipment; The positive pole of described second diode connects an end of inductance; The other end of inductance is connected to the current output terminal of equipment; The negative pole of first diode and the test side of controller all connect the positive pole of second diode; The control end of controller is controlled dutycycle and/or the switching frequency of described electronic switch.
Alternatively, described current stabilization unit comprises second diode, inductance and electronic switch, and the negative pole of described second diode links to each other with an end of inductance, and all is connected to the positive pole of first diode; The current input terminal of the other end connection device of described inductance; The current output terminal of the anodal connection device of second diode, and link to each other with an end of electronic switch; The other end of electronic switch connects the negative pole of first diode; The control end of described controller connects the negative pole of second diode, and control end is controlled dutycycle and/or the switching frequency of described electronic switch.
Alternatively, described current stabilization unit comprises second diode, inductance and electronic switch, the current output terminal of an end connection device of inductance, and the other end connects the positive pole of second diode, and links to each other with an end of electronic switch; The other end of electronic switch connects the negative pole of first diode; The current input terminal of the equal connection device in test side of the positive pole of the negative pole of second diode, first diode and controller; The control end of described controller is controlled dutycycle and/or the switching frequency of described electronic switch.
The present invention also provides a kind of Circuits System, comprises current bus, equipment and above-mentioned current regulating circuit, and described equipment connects current bus by described current regulating circuit.
Alternatively, described equipment is generating set, consumer or energy storage device.
Compared with prior art, the disclosed current regulating circuit of the technical program has the following advantages at least:
1) current regulating circuit of this programme is regulated the electric current of the equipment of flowing through by the mutual collocation of control module, current stabilization unit and dividing cell, make the electric current of the equipment of flowing through remain at its working current, and unnecessary electric current can flow through by dividing cell, thereby the equipment that makes is in best duty, improve the performance of equipment, and prolonged its serviceable life.
2) in the possibility, comprise electronic switch, inductance and second diode in the current stabilization unit, described second diode is when electronic switch disconnects, a loop is provided, when being the electronic switch disconnection, inductance, equipment and second diode constitute a loop, make that the electric current on the inductance can instantaneous variation.So just avoided the instantaneous variation of the electric current of the equipment of flowing through, and then can avoid equipment is caused damage.
Therefore in addition, compared to electric capacity, the inductance thermotolerance is better, and is longer in the following life-span of hot environment, uses inductance as energy-storage travelling wave tube in the circuit of this programme, can improve the serviceable life of equipment under hot environment so effectively.
3) in the possibility, therefore the electric current that controller can checkout equipment, voltage or both are detected simultaneously can accurately draw the switching frequency of electronic switch, and then the electric current of more accurately flowing through in the opertaing device.
In addition, controller can also be controlled the switching frequency of electronic switch by the pulse signal of dynamic frequency.Like this, can reduce the inductance value of required inductance in the current regulating circuit on the one hand by the switching frequency that improves electronic switch, therefore can select the little inductance of inductance value, thereby can reduce the volume of inductance; After the inductance value in the current regulating circuit is fixing, when current ratio is low, can reduce switching frequency, to reduce the switch cost of electronic switch, keep acceptable current ripple simultaneously.
4) the present invention also provides the Circuits System of using above-mentioned current regulating circuit, in this system, a plurality of devices in series can be got up use.On the one hand, current regulating circuit can be so that each equipment all be operated in optimum condition, thereby has improved performance, the efficient of equipment and prolonged serviceable life of equipment; On the other hand, can also be with the devices in series of different operating electric current in same loop, thus increased the elasticity of this system, make it have more practicality.
Description of drawings
Fig. 1 is the synoptic diagram of current regulating circuit one embodiment of the present invention;
Fig. 2 is the structural representation of controller shown in Fig. 1;
Fig. 3 is the synoptic diagram of another embodiment of current regulating circuit of the present invention;
Fig. 4 is the synoptic diagram of Circuits System one embodiment of the present invention.
Embodiment
For above-mentioned purpose of the present invention, feature and advantage can more be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is described in detail.
Set forth detail in the following description so that fully understand the present invention.But the present invention can be different from alternate manner described here and implements with multiple, and those skilled in the art can do similar popularization under the situation of intension of the present invention.Therefore the present invention is not subjected to the restriction of following public embodiment.
Embodiment one
Fig. 1 is the synoptic diagram of current regulating circuit one embodiment of the present invention.As shown in Figure 1, described current regulating circuit comprises: control module 11, current stabilization unit 12 and dividing cell 13.In the present embodiment, described equipment 1 comprises current input terminal I
InWith current output terminal I
Out
Described control module 11 for detection of the electric parameter of equipment 1, and is controlled described current stabilization unit 12 according to testing result; Described current stabilization unit 12 connects current bus 10, equipment 1 and control module 11, is used for regulating according to the testing result of described control module 11 electric current of the equipment 1 of flowing through; Described dividing cell 13 is in parallel with equipment 1, when the electric current of the equipment of flowing through 1 is lower than the electric current of current bus 10, from the unnecessary electric current of current bus 10 described dividing cell 13 by-path turn-ons of flowing through.
Particularly, in the present embodiment, described dividing cell 13 comprises the first diode D11; Described current stabilization unit 12 comprises electronic switch S11, the second diode D21 and inductance L 11; Described control module 11 comprises controller 110; Described controller 110, for detection of the electric parameter of equipment 1, with conducting or the disconnection of controlling described electronic switch S11, and the electric current I of regulating the described equipment 1 of flowing through by the switching frequency of controlling described electronic switch S11
11
Wherein, the positive pole of the described first diode D11 connects the end of described electronic switch S11, the current output terminal I of negative pole connection device 1
OutThe other end of described electronic switch S11 connects the negative pole of the described second diode D21, and is connected to an end of inductance L 11; The current input terminal I of the other end connection device 1 of described inductance L 11
InDescribed controller 110 comprises current detecting end 112 and control end 114; Described controller 110 comes checkout equipment 1 current output terminal I by current detecting end 112
OutElectric current, and control the switching frequency of electronic switch S11 by control end 114.
Described electronic switch S11 can comprise polytype switch, and it shall not be applied to restriction protection scope of the present invention, and for example in the present embodiment, described electronic switch S11 can be MOS transistor.
In addition, in the present embodiment, described controller 110 comes the current output terminal I of checkout equipment 1 by current detecting end 112
OutElectric current, but it should not limit protection scope of the present invention, in other embodiments, described controller 110 can also comprise a voltage detecting end (not shown).
Described voltage detecting end is for detection of the voltage of equipment 1, and controls the switching frequency of electronic switch S11 by control end 114.Certainly, the detection mode of controller 110 be not limited to above for example, for example, electric current, voltage or both combinations that described controller 110 can checkout equipment 1 etc.But be noted that described current detecting end 112 and voltage detecting end end need be positioned at the same side of controller 110, and above-mentioned current detecting end 112 and voltage detecting end are not positioned at the same side with described control end 114.
Fig. 2 is a kind of structural representation of the described controller 110 of Fig. 1.As shown in Figure 2, described controller 110 can comprise: comparative analysis unit 130 and pulse modulation unit 140.
Described controller 110 is by the current output terminal I of current detecting end 112 checkout equipments 1
OutElectric current, and testing result is sent to comparative analysis unit 130.In the present embodiment, described controller 110 includes only the current detecting end 112 for detection of the equipment of flowing through 1 electric current, still, and in other embodiments, described controller 110 can also comprise a voltage detecting end, and described voltage detecting end is for detection of the voltage of equipment 1.
Described comparative analysis unit 130 compares the testing result that receives and the electric parameter of described equipment 1, and comparative result is sent to pulse modulation unit 140.
Particularly, in the present embodiment, described comparative analysis unit 130 (is equipment 1 current output terminal I with testing result
OutElectric current) compare with the working current of equipment 1 when being operated in best power point, and comparative result is sent to pulse modulation unit 140.
Described pulse modulation unit 140 according to the comparative result production burst signal that receives, and is controlled the switching frequency of described electronic switch S11 according to described pulse signal.
In addition, the pulse modulation technology of fixed frequency commonly used in the prior art, in the present embodiment, described controller 110 combines the switching frequency that pulse-width modulation and dynamic frequency adjustment technology are controlled described electronic switch S11.
Well known to a person skilled in the art, under certain current known size, for the electric current that makes equipment is kept identical ripple current, just must strengthen inductance value behind the switching frequency of reduction electronic switch.Yet the size of inductance value is directly proportional with the volume of inductance, and namely inductance value is more big, and the volume of inductance is more big, therefore, if the switching frequency by reducing electronic switch when reducing switch cost, will inevitably cause the increase of inductance volume, cause the increase of current regulating circuit volume the most at last.Otherwise if the switching frequency of electronic switch is more high, then its required inductance value is more little, can reduce the volume of inductance this moment, and finally reduce the volume of current regulating circuit, but the switch cost of more big its switch of the frequency of electronic switch is more big, causes its efficient to reduce.
Therefore, when circuit design, can design the switching frequency of inductance value and electronic switch according to the worst situation (worst case) usually, but can cause conservative design (over design) like this.And by in conjunction with pulse-width modulation technology and dynamic frequency adjustment technology, just can be so that the part of conservative design can change into the raising of efficient, or reduce volume by the reduction inductance value, or a part raises the efficiency, another part is to reduce volume.
Particularly, in the present embodiment, when design circuit, get a less inductance value, to reduce the volume of current regulating circuit.In actual applications, with reference to figure 1, when the duty of equipment 1 is good, electronic switch S11 will maintain the state of conducting always, the electric current I of the equipment 1 of flowing through
11=I
S, at this moment, all electric currents equipment 1 of all flowing through, dividing cell 13, i.e. I and no current is flowed through
21=0; When the duty of equipment 1 reduces, go to control the dutycycle of electronic switch S11 by controller 110, thereby make the electric current I of equipment 1 of flowing through
11Reduce unnecessary electric current I
21Then via dividing cell 13 by-path turn-ons, to keep current stabilization on the current bus 10 in I
SWhen the duty of equipment 1 when not working, electronic switch S11 will maintain the state of disconnection always, thereby make all electric currents all via dividing cell 13 by-path turn-ons, like this, the electric current on the current bus 10 still is maintained and is stable at I
s
Therefore, the controller 110 of present embodiment makes that by pulse-width modulation and dynamic frequency adjustment technology described current regulating circuit is more flexible, has increased other practicality.
Understand circuit conditioning circuit shown in Figure 1 for convenient and clear, below in conjunction with Fig. 1 and Fig. 2 the principle of work of described current regulating circuit is elaborated.
In the present embodiment, described equipment 1 is consumer, and the maximum current on the current bus 10 is I
S
With reference to figure 1 and Fig. 2, be operated on the best power point in order to make described equipment 1, controller 110 can produce corresponding pulse signal and control the switching frequency of electronic switch S11 by control end 114.At this moment, electronic switch S11 forms specific dutycycle with the conducting constantly of specific frequency and disconnection, by the whole size of current of EDM Generator of Adjustable Duty Ratio, thus the electric current I of the feasible equipment 1 of flowing through
11Be its required working current.At this moment, part electric current I
21The dividing cell 13 of will flowing through, thus described dividing cell 13 has just played shunting action, i.e. I
S=I
11+ I
21
Electric current I on the current detecting end 112 detected equipment 1 of flowing through of described controller 110
11When fluctuation occurring, described controller 110 will correspondingly be adjusted the pulse signal of its generation, and adjust dutycycle and the switching frequency of electronic switch S11 by control end 114.
Particularly, when the electric current I of the equipment of flowing through 1
11When reducing suddenly, described controller 110 will detect the electric current I of the equipment of flowing through 1 by current detecting end 112
11Descend, thereby described controller 110 will be adjusted the pulse signal of its generation according to this testing result, and adjust the dutycycle of electronic switch S11 by control end 114, thereby finally adjust the switching frequency of described electronic switch.Like this, just can be so that the maximum current I on the current bus 10
SRemain unchanged, thus also just can be so that other equipment (not shown)s on the same loop still be operated on its best power point.
Again particularly, the switching frequency of described electronic switch S11 is by controller 110 control, and when described electronic switch S11 conducting, electric current is flowed through and is input to the current input terminal I of equipment 1 after the inductance L 11 again
InWhen needs reduced electric current on the equipment 1 of flowing through, the described electronic switch S11 of controller 110 controls disconnected it, and the electric current instant value on this moment electronic switch S11 is zero.And inductance L 11 is as a kind of energy-storage travelling wave tube, then can produce reverse electromotive force (being that the A end electromotive force of described inductance L 11 is greater than the electromotive force of B end), thereby can provide electric current for equipment 1, and serve as zero to avoid described electronic switch S11 moment to disconnect the electric current that causes.
Further, when described electronic switch S11 disconnected, inductance L 11, equipment 1 and the second diode D21 constituted a loop, were discharged at leisure and were provided electric current to equipment 1 by inductance L 11; And when controller 110 with described electronic switch S11 again after the conducting, inductance L 11 just will be connected with equipment 1 as a lead (less resistance in other words), this moment is by electronic switch S11, inductance L 11 and equipment 1 common series connection and form a loop.
Current regulating circuit of the present invention makes the continuous conducting of described electronic switch S11 and disconnection by said method, and adjusts the dutycycle of electronic switch S11 and the electric current I that switching frequency makes the equipment of flowing through 1 according to the duty of equipment
11Can keep certain electric current, unnecessary electric current is then via dividing cell 13 by-path turn-ons.By above-mentioned shunting mode to the electric current I on the current bus 10
SAfter shunting, can avoid the unmatched problem of electric current between equipment 1 and other equipment effectively, make that the equipment on the same loop all can be operated in its optimum condition, when improving the equipment serviceability, also can prolong its serviceable life.In addition, after by said method the switching frequency of electronic switch S11 dynamically being adjusted, the current ripple of the equipment 1 of flowing through can be adjusted in real time, thereby can also reduce current loss further.
In addition, the current stabilization unit 12 of present embodiment comprises inductance L 11, compares with electric capacity, and the thermotolerance of inductance is better, under hot environment the life-span of inductance longer, therefore, the life-span of the current regulating circuit of present embodiment under hot environment is also longer.
Embodiment two
Fig. 3 is the synoptic diagram of another embodiment of current regulating circuit of the present invention.As shown in Figure 3, the present embodiment current regulating circuit comprises: control module 21, current stabilization unit 22 and dividing cell 23.Wherein, described equipment 2 comprises current input terminal I
InWith current output terminal I
Out
Described control module 21 comprises controller 210, for detection of the current output terminal I of equipment 2
OutElectric parameter, and control described current stabilization unit 22 according to testing result; Described current stabilization unit 22, connection device 2, current bus 20 and control module 21, the testing result of the described control module 21 of foundation is regulated the electric current of the equipment 2 of flowing through; Described dividing cell 23 is in parallel with described equipment 2, is lower than the electric current I of current bus 20 when equipment 2 required electric currents
SThe time, described dividing cell 23 can be shunted, and the electric current of the feasible equipment 2 of flowing through is I
12, and from the unnecessary electric current I of described current bus 20
22Described dividing cell 23 by-path turn-ons, wherein I flow through
S=I
12+ I
22
Particularly, in the present embodiment, described dividing cell 23 comprises the first diode D12; Described current stabilization unit 22 comprises electronic switch S21, the second diode D22 and inductance L 21.
Wherein, the positive pole of the described first diode D12 connects the end of described electronic switch S21, the current input terminal I of the other end connection device 2 of described electronic switch S21
InThe negative pole of the described first diode D12 connects the positive pole of the described second diode D22, and is connected to an end of inductance L 21; The current output terminal I of the other end connection device 2 of described inductance L 21
Out
In the present embodiment, described controller 210 comprises two test sides, current detecting end 212 as shown in Figure 3, voltage detecting end 213, and described controller 210 also comprises control end 214.The current detecting end 212 of described controller 210 can be for detection of the electric current of equipment 2, and voltage detecting end 213 can be for detection of the voltage of equipment 2.Described current detecting end 212 and voltage detecting end 213 can be simultaneously detect the electric parameter of equipment 2, also can be detected by one of them respectively, and it should not limit protection scope of the present invention.In the present embodiment, described current detecting end 212 and voltage detecting end 213 detect the electric parameter of equipment 2 simultaneously.
Continue with reference to shown in Figure 3, the current detecting end 212 of described controller 210 all is connected the negative pole of the first diode D12 and the positive pole of the second diode D22 with voltage detecting end 213; The switching frequency of the described electronic switch S21 of control end 214 controls of controller 210.
Need to prove that the controller 210 of present embodiment and the structure similar of the controller 110 shown in Fig. 1 be not so repeat them here; Electronic switch S21 in the present embodiment and electronic switch S11 shown in Figure 1 are similar, and namely described electronic switch S21 can comprise polytype switch equally, and in the present embodiment, described electronic switch S21 is MOS transistor.
Principle of work below in conjunction with the current regulating circuit of the present embodiment of Fig. 3 elaborates.
In the present embodiment, equipment 2 still is consumer, and the electric current that current bus 20 provides is I
SWith reference to figure 3, be operated on the best power point in order to make described equipment 2, controller 210 can produce corresponding pulse signal and control the dutycycle of electronic switch S21 by control end 214.
The dutycycle of described electronic switch S21 refers to: in one-period, and the ratio that electronic switch S21 conducting is shared.Well known to a person skilled in the art, switching frequency one timing of electronic switch, its dutycycle is more big, and is more big by the electric current of electronic switch; Otherwise the electronic switch dutycycle is more little, and is more little by the electric current of electronic switch.
At this moment, electronic switch S21 is with specific frequency and the specific continuous conducting of dutycycle and disconnection, thus the electric current I of the feasible equipment 2 of flowing through
12Be its required working current.At this moment, part electric current I
22The dividing cell 23 of will flowing through, thus described dividing cell 23 has just played shunting action, i.e. I
S=I
12+ I
22
After the current detecting end 212 of described controller 210 and voltage detecting end 213 detect electric parameter on the equipment 2 and change, to correspondingly adjust the pulse signal of its generation according to testing result, and adjust the switching frequency of electronic switch S21 by control end 214, with the flow through electric current I of equipment 2 of adjustment
12
Particularly, the electric current I on current bus 20
sWhen raising suddenly, described controller 210 will detect the electric current I of the equipment of flowing through 2 by current detecting end 212
12Moment rises, and the voltage that while voltage detecting end 213 also can detect on the equipment 2 rises to some extent, thereby described controller 210 will be adjusted the pulse signal of its generation according to this testing result, and reduces the dutycycle of electronic switch S21 by control end 214.Like this, just can be so that the electric current I of the equipment 2 of flowing through
12Keep stable, and unnecessary electric current I
22By the dividing cell by-path turn-on, thus also just can be so that equipment 2 still be operated on its best power point, and make that the electric current that has the equipment of different operating electric current on the same loop is mated.
More specifically, the dutycycle of described electronic switch S21 is by controller 210 control, when described electronic switch S21 conducting, and the electric current I on the current bus 20
SThe current input terminal I of whole inflow equipment 2
In, again by its current output terminal I
OutInput to inductance L 21.
On the contrary, when the duty of equipment 2 reduces, described controller 210 will detect the electric current slump in demand of the equipment of flowing through 2 by current detecting end 212, voltage detecting end 213 also can detect the voltage reduction on the equipment 2 simultaneously, thereby described controller 210 will be adjusted the pulse signal of its generation according to this testing result, and reduce the dutycycle of electronic switch S21 by control end 214.Like this, just can reduce the electric current I of the equipment of flowing through 2
12, and unnecessary electric current I
22By dividing cell 23 bypass, thus also just can be so that having the electric current of the equipment of different operating electric current on the same loop be mated, and each equipment all is operated on its best power point.
Simultaneously, the inductance of the current stabilization unit 22 of described current regulating circuit is certain value, therefore works as the electric current I of equipment 2
12When diminishing, can reduce the switching frequency of electronic switch S21 by described controller 210, thereby reduce current loss.
In the present embodiment, by the dutycycle of described controller 210 control electronic switch S21, to keep certain electric current at equipment 2, described electric current just provides its required working current for equipment 2.In the present embodiment, by to the electric current I on the current bus 20
SAfter shunting, can avoid the electric current mismatch problem of equipment 2 effectively, and guarantee the operate as normal of equipment 2.
Need to prove; among above-mentioned two embodiment; by controller switching frequency or the dutycycle of electronic switch are controlled respectively; but it should not limit protection scope of the present invention; in other embodiments, also can be controlled switching frequency and the dutycycle of electronic switch by controller simultaneously, to realize the adjusting to the electric current of the equipment of flowing through; other distortion of doing under spirit of the present invention or simple the replacement all should fall into protection scope of the present invention.
In addition, in other embodiments, described current regulating circuit can also be by other circuit implementation.
For example, described current regulating circuit comprises current stabilization unit, control module, dividing cell.Described dividing cell comprises first diode; Described control module comprises controller; Described current stabilization unit comprises second diode, inductance and electronic switch.Particularly, the negative pole of described second diode links to each other with an end of inductance, and all is connected to the positive pole of first diode; The current input terminal of the other end connection device of described inductance; The current output terminal of the anodal connection device of second diode, and link to each other with an end of electronic switch; The other end of electronic switch connects the negative pole of first diode; The test side of described controller connects the negative pole of second diode, and control end is controlled the switching frequency of described electronic switch.
For another example, described current regulating circuit comprises current stabilization unit, control module, dividing cell.Described dividing cell comprises first diode; Described control module comprises controller; Described current stabilization unit comprises second diode, inductance and electronic switch.Particularly, the current output terminal of an end connection device of inductance, the other end connects the positive pole of second diode, and links to each other with an end of electronic switch; The other end of electronic switch connects the negative pole of first diode; The current input terminal of the equal connection device in test side of the positive pole of the negative pole of second diode, first diode and controller; The control end of controller is controlled the switching frequency of described electronic switch.
Embodiment three
The present invention also provides a kind of Circuits System of using above-mentioned current regulating circuit.With reference to figure 4, described Circuits System comprises: equipment 3, equipment 4, equipment 5, current bus 100 and with described equipment 3,4,5 current regulating circuit 30,40,50 one to one.
Wherein, described current regulating circuit 30,40,50 structure and principle of work and current regulating circuit shown in Figure 1 are similar, so do not repeat them here.Certainly, in other embodiments, can adopt current regulating circuit shown in Figure 3, it should not limit protection scope of the present invention yet.
In the present embodiment, described equipment 3,4,5 is generating set, for example solar panels.Certainly, described equipment 3,4,5 also can adopt other generating set in other embodiments, and it should not limit protection scope of the present invention.Described equipment 3,4,5 series connection backs provide working current by current bus 100 for consumer (not shown among Fig. 4).
For convenience of description, suppose that the maximum current that each generating set in the present embodiment such as equipment 3, equipment 4 and equipment 5 produce is I
SThe electric current that equipment 5 provides is I
15, the electric current that equipment 4 provides is I
14, the electric current that equipment 3 provides is I
13And the electric current of described equipment 3,4,5 best power point is I
S
When described equipment 3,4,5 electrical specification and outside working environment are all identical, make when described equipment 3,4,5 all is operated in its best power point electric current I
13=I
14=I
15At this moment, electronic switch S31, S41, S51 all maintain the state of disconnection always, provide identical current value thereby make equipment 3,4,5 be current bus 100, also are I
13=I
14=I
15=I
S
Yet in actual applications, solar panels may be covered by shade, dust etc. or reason such as aging causes the electric current reduction of its best power point.In the present embodiment, suppose that equipment 3 is owing to aging reason causes the electric current of its best power point less than equipment 4 or 5, i.e. I
13＜I
S, and I
14=I
15=I
S
In the prior art, the electric current I on the current bus 100
SCan be subjected to the influence of the electric current that each generating set produces on the same loop.For example, if the solar panels of equipment 3 cause its electric current that produces to diminish because of the problems referred to above, be all the equipment 4 of solar panels and the electric current of equipment 5 so also can diminish thereupon, thereby cause equipment 4 and equipment 5 all can't be operated in optimum condition, and then reduced the power generation performance of equipment 4 and equipment 5.
On the other hand, the electric current that provides owing to equipment 3,4,5 all diminishes, thereby causes the electric current I on the current bus 100
SAlso diminish, the consumer (Fig. 4 is not shown) in the so same loop also will be because of the electric current I on the current bus 100 thereupon
SDiminish and can't be operated in the best power point, and then influenced the serviceability of this consumer.
In addition, in another case, if there is not current regulating circuit, and equipment 3 damages fully, and this Circuits System can't be worked so, thereby influence whole system operation performance and serviceable life.
And in the present embodiment, can be stabilized in I in order to guarantee the size of current on the current bus 100
S, the controller 310 in the current regulating circuit 30 will send pulse signal control electronic switch S31, make the switching frequency of described electronic switch S31 diminish, with the electric current I of inflow equipment 3
13, accordingly, have electric current I on the diode D31
23By, this moment I
13+ I
23=I
SElectric current I
13In the inflow current bus 100 of flowing through behind the equipment 3 still, therefore, the electric current on the current bus 100 still is I
S, therefore, equipment 3,4,5 can provide stable electric current I to current bus 100
S
Under another situation, when described equipment 3 damages fully, in the time of can't generating electricity, described controller 310 will be controlled electronic switch S31, make described electronic switch S31 disconnect fully, thereby described equipment 3 is peeled off away from this system, caused the loss of power like this with regard to having avoided equipment 4,5 electric currents that produce to flow through equipment 3.Certainly, in other embodiments, when damaging as if equipment 4 or 5, the current regulating circuit 410 or 510 corresponding with it also will be controlled electronic switch S41 or S51, equipment 4 or 5 be peeled off from system, thereby also avoided the loss of power in the system.
In the present embodiment, described controller 310 by checkout equipment 3 current output terminals electric current and voltage producing the pulse signal of control electronic switch S31, and the switching frequency by control electronic switch S31 makes the electric current I of inflow equipment 3
13Reduce, and unnecessary electric current I
23Flow out by diode D31.Like this, through behind the equipment 3, the electric current on the current bus can more stably remain on I
S, and can be because of the aging loss that causes electric current of equipment 3.
Certainly, when also there was the problem of electric current reduction in equipment 4 or 5, the Circuits System of present embodiment still can be with the current stabilization on the current bus 100 at I
SSimilar with the principle of work of controller 310, controller 410 or 510 passes through the electric current of checkout equipment 4 or 5 and voltage is controlled electronic switch S41 or S51 with generation pulse signal, switching frequency by control electronic switch S41 or S51 makes the electric current of inflow equipment 4 or 5 reduce, and allows unnecessary electric current flow out by diode D41 or D51.So just can so that the current stabilization on the current bus 100 at I
S
Need to prove, comprised three equipment 3,4,5 in the present embodiment, but this is for illustrating, and should not limit protection scope of the present invention, in other embodiments, can also comprise one, the equipment more than two or three.In addition, in other embodiments, described equipment 3,4,5 also can be energy storage devices such as consumer or accumulator, or even the array mode of generating set, consumer and energy storage device, and is not limited only to the generating set in the present embodiment.
For generating set, if the electric current between the equipment does not match, each equipment can't be operated on the best power point so, thereby influence generated energy.For energy storage device, if the electric current of equipment room does not match, will influence the degree of depth that discharges and recharges of each energy storage device, and then influence the life-span of each energy storage device.For consumer, if the electric current of equipment room does not match, each consumer can't regular event so.Therefore, for the commingled system that comprises consumer, energy storage device or generating set, if matching, the electric current of equipment room will seriously not influence the serviceability of each equipment.And Circuits System of the present invention can make each equipment all be operated in its optimum condition, thereby has improved performance and the efficient of each equipment; On the other hand, this Circuits System can also the same loop with the devices in series of different operating electric current in, thereby increased the practicality of this system.
Though the present invention with preferred embodiment openly as above; but it is not to limit the present invention; any those skilled in the art without departing from the spirit and scope of the present invention; can utilize method and the technology contents of above-mentioned announcement that technical solution of the present invention is made possible change and modification; therefore; every content that does not break away from technical solution of the present invention; to any simple modification, equivalent variations and modification that above embodiment does, all belong to the protection domain of technical solution of the present invention according to technical spirit of the present invention.
Claims (12)
1. current regulating circuit, it is characterized in that, described current regulating circuit be used for to be regulated the electric current of the equipment of flowing through between equipment and current bus, and the current input terminal of described equipment be connected with current bus again after current output terminal is connected to described current regulating circuit respectively; Described current regulating circuit comprises at least: current stabilization unit, control module and dividing cell, and described control module for detection of the electric parameter of equipment, and is controlled described current stabilization unit according to testing result; Described current stabilization unit connects current bus, equipment and control module, is used for regulating according to the testing result of described control module the electric current of the equipment of flowing through; Described dividing cell is in parallel with equipment, when the electric current of the equipment of flowing through is lower than the electric current of current bus, from the unnecessary electric current of the current bus described dividing cell by-path turn-on of flowing through.
2. current regulating circuit as claimed in claim 1, it is characterized in that, described control module comprises a controller at least, described controller comprises test side and control end, described test side is for detection of the electric parameter of equipment, described controller is handled testing result, and regulates the electric current of the equipment of flowing through by control end control current stabilization unit.
3. current regulating circuit as claimed in claim 2 is characterized in that, described controller is handled at least testing result and comprised: described controller compares analysis to testing result, and produces corresponding pulse-modulated signal according to the comparative analysis result.
4. current regulating circuit as claimed in claim 2 is characterized in that, the test side of described controller comprises a current detecting end at least, for detection of the electric current of the equipment of flowing through.
5. current regulating circuit as claimed in claim 4 is characterized in that, the test side of described controller also comprises a voltage detecting end, for detection of the voltage of equipment.
6. current regulating circuit as claimed in claim 2 is characterized in that, described dividing cell comprises first diode at least, and the positive pole of described first diode is coupled to the current input terminal of equipment, and negative pole is coupled to the current output terminal of equipment.
7. current regulating circuit as claimed in claim 6, it is characterized in that, described current stabilization unit comprises second diode, inductance and electronic switch, one end of described electronic switch connects the positive pole of first diode, the other end connects the negative pole of described second diode, and links to each other with an end of described inductance; The current input terminal of the other end connection device of described inductance; The current output terminal of the equal connection device in test side of the negative pole of the positive pole of described second diode, first diode and controller; The control end of described controller is controlled dutycycle and/or the switching frequency of described electronic switch.
8. current regulating circuit as claimed in claim 6, it is characterized in that, described current stabilization unit comprises second diode, inductance and electronic switch, one end of described electronic switch connects the positive pole of first diode, the other end connects the negative pole of described second diode, and links to each other with the current input terminal of equipment; The positive pole of described second diode connects an end of inductance; The other end of inductance is connected to the current output terminal of equipment; The negative pole of first diode and the test side of controller all connect the positive pole of second diode; The control end of controller is controlled dutycycle and/or the switching frequency of described electronic switch.
9. current regulating circuit as claimed in claim 6 is characterized in that, described current stabilization unit comprises second diode, inductance and electronic switch, and the negative pole of described second diode links to each other with an end of inductance, and all is connected to the positive pole of first diode; The current input terminal of the other end connection device of described inductance; The current output terminal of the anodal connection device of second diode, and link to each other with an end of electronic switch; The other end of electronic switch connects the negative pole of first diode; The test side of described controller connects the negative pole of second diode, and control end is controlled dutycycle and/or the switching frequency of described electronic switch.
10. current regulating circuit as claimed in claim 6, it is characterized in that described current stabilization unit comprises second diode, inductance and electronic switch, the current output terminal of an end connection device of inductance, the other end connects the positive pole of second diode, and links to each other with an end of electronic switch; The other end of electronic switch connects the negative pole of first diode; The current input terminal of the equal connection device in test side of the positive pole of the negative pole of second diode, first diode and controller; The control end of described controller is controlled dutycycle and/or the switching frequency of described electronic switch.
11. a Circuits System comprises current bus and equipment, it is characterized in that, also comprises: as each described current regulating circuit of claim 1～10, described equipment connects current bus by described current regulating circuit.
12. current regulating circuit as claimed in claim 11 is characterized in that, described equipment is generating set, consumer or energy storage device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100334588A CN103257663A (en) | 2012-02-15 | 2012-02-15 | Current adjusting circuit and circuit system with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100334588A CN103257663A (en) | 2012-02-15 | 2012-02-15 | Current adjusting circuit and circuit system with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103257663A true CN103257663A (en) | 2013-08-21 |
Family
ID=48961626
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100334588A Pending CN103257663A (en) | 2012-02-15 | 2012-02-15 | Current adjusting circuit and circuit system with same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103257663A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4476399A (en) * | 1982-06-10 | 1984-10-09 | Fuji Electric Co., Ltd. | Stabilized power source parallel operation system |
| CN1904789A (en) * | 2005-07-28 | 2007-01-31 | 半导体元件工业有限责任公司 | Current regulator and method therefor |
| CN201207271Y (en) * | 2008-05-16 | 2009-03-11 | 康佳集团股份有限公司 | Working current regulating circuit of LED module |
| CN101394700A (en) * | 2007-09-17 | 2009-03-25 | 钰瀚科技股份有限公司 | Constant current regulating circuit having current sensing loop |
| CN201307834Y (en) * | 2008-10-31 | 2009-09-09 | 上海智大电子有限公司 | DC current regulator |
| US20110109291A1 (en) * | 2009-11-11 | 2011-05-12 | Richtek Technology Corp. | Frequency control circuit and method for a non-constant frequency voltage regulator |
| CN102105008A (en) * | 2011-01-04 | 2011-06-22 | 罗宏基 | Load current adjusting circuit |
| CN102156500A (en) * | 2010-11-18 | 2011-08-17 | 国网电力科学研究院武汉南瑞有限责任公司 | Adjusting method for stabilizing current of parallel direct current resource |
-
2012
- 2012-02-15 CN CN2012100334588A patent/CN103257663A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4476399A (en) * | 1982-06-10 | 1984-10-09 | Fuji Electric Co., Ltd. | Stabilized power source parallel operation system |
| CN1904789A (en) * | 2005-07-28 | 2007-01-31 | 半导体元件工业有限责任公司 | Current regulator and method therefor |
| CN101394700A (en) * | 2007-09-17 | 2009-03-25 | 钰瀚科技股份有限公司 | Constant current regulating circuit having current sensing loop |
| CN201207271Y (en) * | 2008-05-16 | 2009-03-11 | 康佳集团股份有限公司 | Working current regulating circuit of LED module |
| CN201307834Y (en) * | 2008-10-31 | 2009-09-09 | 上海智大电子有限公司 | DC current regulator |
| US20110109291A1 (en) * | 2009-11-11 | 2011-05-12 | Richtek Technology Corp. | Frequency control circuit and method for a non-constant frequency voltage regulator |
| CN102156500A (en) * | 2010-11-18 | 2011-08-17 | 国网电力科学研究院武汉南瑞有限责任公司 | Adjusting method for stabilizing current of parallel direct current resource |
| CN102105008A (en) * | 2011-01-04 | 2011-06-22 | 罗宏基 | Load current adjusting circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8212409B2 (en) | Method for activating a multi-string inverter for photovoltaic plants | |
| US9612608B2 (en) | Maximum power point tracker bypass | |
| CN102158067B (en) | Starting circuit for switching power supply | |
| WO2011120311A1 (en) | Solar power system, control device and control method thereof | |
| US10090701B2 (en) | Solar power generation system | |
| CN103345903B (en) | A kind of LED backlight system and display device | |
| US20190013753A1 (en) | Control method and control system for enhancing endurance to anomalous voltage for doubly-fed induction generator | |
| US20120155141A1 (en) | Power converting apparatus, grid interconnection apparatus and grid interconnection system | |
| US9306407B2 (en) | Battery system and method | |
| JPWO2013118376A1 (en) | Power supply system and charge / discharge power conditioner used therefor | |
| US11626738B2 (en) | Photovoltaic system | |
| CN103199704A (en) | Three-port DC-DC (direct current) converter topology circuit | |
| US20230170844A1 (en) | Photovoltaic system, inverter, and bus voltage control method for inverter | |
| US20100118575A1 (en) | Power Inverter | |
| CN110784095A (en) | High-efficiency switching power supply circuit and LED display screen | |
| KR20090132504A (en) | Photovoltaic circuit | |
| JP2014030108A (en) | Power control device, storage battery and power control system | |
| US11637431B2 (en) | Inverter | |
| CN116915169B (en) | Photovoltaic cell bypass circuit | |
| US20240014664A1 (en) | Power supply system and method for controlling output voltage of direct current combiner box | |
| KR20160075054A (en) | Maximum power point tracking apparatus and method | |
| CN103257663A (en) | Current adjusting circuit and circuit system with same | |
| KR102514251B1 (en) | Power generation units and systems that track peak power | |
| WO2014067522A1 (en) | Power factor correction circuit | |
| US9608620B2 (en) | Control system and control method for controlling a switching device integrated in an electronic converter and switching cell comprising said system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130821 |