CN103812316B - Differential mode current detection control method and device - Google Patents
Differential mode current detection control method and device Download PDFInfo
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Abstract
The embodiment of the invention provides a differential mode current detection control method and device. The differential mode current detection control device comprises a detection module, a control module and a regulating module, wherein the detection module is connected with coupling inductors; the input end of the control module is connected with the output end of the detection module; the output end of the control module is connected with the regulating module; the detection module is used for performing differential mode current detection on corresponding branches of at least two coupling inductors; the control module is used for acquiring a differential mode voltage regulating amount according to the detection result of the detection module; the regulating module is used for regulating modulation voltage of corresponding branches of at least two coupling inductors according to the differential mode voltage regulating amount to lower the influence of the differential mode current. According to the embodiment, the problems of reduction of the inversion power supply efficiency, over-large noise and even inductance saturation due to increase of the differential mode current are solved.
Description
Technical field
The present embodiments relate to communication technology, more particularly, to a kind of differential-mode current detection control method and device.
Background technology
In uninterrupted power source (uninterruptible power system, abbreviation ups) field, inverter extensively should
For the occasion of various requirement reliable power supply, such as in the communications field, generally power to crucial AC load using inverter.
Inverter possesses 3 power port: direct current (battery) input port, exchange input port and exchange delivery outlet, corresponding 3 power changes
Parallel operation, be respectively: battery low pressure is upgraded to high direct voltage, or unidirectional current (direct current, abbreviation dc) high pressure drop
It is converted into high direct voltage for the dc/dc changer of battery low pressure, by alternating current (alternating current, abbreviation ac) simultaneously
Complete the ac/dc commutator of input power factor correction and the dc/ac inverter that high direct voltage is converted into ac output.When will
When asking the capacity of separate unit inverter larger, generally adopt powerful power inverter, meanwhile, for reducing loss, power becomes
Parallel operation is often using relatively low switching frequency and in parallel by coupling inductance.Compared with conventional filter inductance, coupling inductance energy
Accomplish that volume is less and cost is lower.But coupling inductance is more sensitive to magnetic biasing, as the dc/dc changer in inverter, ac/
Dc commutator and dc/ac inverter by coupling inductance in parallel when, because the dead band of power inverter, tube voltage drop are different or
Circuit impedance is asymmetric, can produce differential-mode current, and then lead to magnetic biasing inside coupling inductance.
It is the difference by reducing the corresponding circuit parameter of each coupling inductance branch road in existing technology, and control mode
On difference suppressing coupling inductance to produce differential-mode current, the program concordance of device and technique are had very strict will
Ask, and the prolongation with inverter system run time, each coupling inductance branch road because of device aging, parameter drift etc. can be in
Reveal different circuit characteristics, still can cause the increase of differential-mode current, lead to the reduction of inverter efficiency, noise excessive even
The problems such as be inductance saturation.
Content of the invention
The embodiment of the present invention provides a kind of differential-mode current detection control method and device, to solve because of the increasing of differential-mode current
Greatly, lead to the problems such as reduction of inverter efficiency, noise excessive even inductance saturation.
In a first aspect, the embodiment of the present invention provide a kind of differential-mode current detection control apparatus, described device be used for detection and
The differential-mode current that at least two coupling inductances in control circuit produce, described device includes: detection module, control module and
Adjustment module, described detection module is connected with described coupling inductance, the input of described control module and described detection module
Outfan connects, and the outfan of described control module is connected with described adjustment module；
Wherein, described detection module, carries out differential-mode current inspection for branch road corresponding to described at least two coupling inductances
Survey；
Described control module, obtains differential mode voltage regulated quantity for the testing result according to described detection module；
Described adjustment module, for according to described differential mode voltage regulated quantity to corresponding of described at least two coupling inductances
The modulation voltage on road is adjusted, to reduce the impact of described differential-mode current.
In conjunction with a first aspect, in the first possible implementation of first aspect, described detection module is included at least
One Hall element；
Described detection module, specifically for by the described at least two coupling electricity of at least one Hall element described detection
Feel corresponding branch road, obtain the entrance current differential of described branch road.
In conjunction with the first possible implementation of first aspect or first aspect, possible in the second of first aspect
In implementation, described control module, including differential-mode current decoupling unit and differential-mode current adjustment unit；
Described differential-mode current decoupling unit, calculates described in acquisition extremely for the described testing result according to described detection module
The differential-mode current value that few two coupling inductances produce respectively；
Described differential-mode current adjustment unit, for the differential-mode current value being produced respectively according to described at least two coupling inductances
Obtain the described differential mode voltage regulated quantity of the corresponding branch road of described at least two coupling inductances.
In conjunction with first aspect, first aspect the first to second any one possible implementation, in first party
In the third possible implementation in face, described adjustment module is specifically for corresponding to described at least two coupling inductances respectively
The modulation voltage of branch road deduct corresponding described differential mode voltage regulated quantity, to reduce the impact of described differential-mode current.
In conjunction with first aspect, first aspect the first in the third any one possible implementation, in first party
In the 4th kind of possible implementation in face, also include: power amplifier module, the input of described power amplifier module with described
Adjustment module connects, and the entrance of the outfan of described power amplifier module branch road corresponding with described at least two coupling inductances is even
Connect；
Described power amplifier module, for the modulation electricity to the corresponding branch road of described at least two coupling inductances after adjusting
Pressure carries out power amplification, provides input voltage to circulate to the corresponding branch road of described at least two coupling inductances.
Second aspect, the embodiment of the present invention provides a kind of differential-mode current to detect control method, and methods described is applied to first
Aspect, first aspect the first in the 4th kind described in any one possible implementation differential-mode current detection control dress
Put, methods described includes:
Differential-mode current detection is carried out to the corresponding branch road of at least two coupling inductances in circuit；
Differential mode voltage regulated quantity is obtained according to differential-mode current testing result；
According to described differential mode voltage regulated quantity, the modulation voltage of the corresponding branch road of described at least two coupling inductances is carried out
Adjust, to reduce the impact of described differential-mode current.
In conjunction with second aspect, in the first possible implementation of second aspect, described at least two in circuit
The corresponding branch road of individual coupling inductance carries out differential-mode current detection, comprising:
The corresponding branch road of described at least two coupling inductances is detected by least one Hall element, obtains described branch road
Entrance current differential；
Described according to differential-mode current testing result obtain differential mode voltage regulated quantity, comprising:
Entrance current differential according to described branch road calculates and obtains the differential mode that described at least two coupling inductances produce respectively
Current value；
Adjusted according to the described differential mode voltage that described differential-mode current value obtains the corresponding branch road of described at least two coupling inductances
Section amount.
In conjunction with the first possible implementation of second aspect or second aspect, possible in the second of second aspect
In implementation, the described modulation electricity according to described differential mode voltage regulated quantity to the corresponding branch road of described at least two coupling inductances
Pressure is adjusted, to reduce the impact of described differential-mode current, comprising:
Respectively the modulation voltage of corresponding for described at least two coupling inductances branch road is deducted corresponding described differential mode voltage
Regulated quantity, to reduce the impact of described differential-mode current.
In conjunction with second aspect, second aspect the first to second any one possible implementation, in second party
In the third possible implementation in face, described according to described differential mode voltage regulated quantity to described at least two coupling inductances pair
The modulation voltage of the branch road answered is adjusted, with reduce described differential-mode current impact after, also include:
Power amplification is carried out to the modulation voltage of the corresponding branch road of described at least two coupling inductances after adjusting, to circulate
There is provided input voltage to the corresponding branch road of described at least two coupling inductances.
Embodiment of the present invention differential-mode current detection control method and device, by the coupling in the circuit of detection inverter
The differential-mode current of inductance simultaneously controls it, and realizes eliminating the purpose of the impact of differential-mode current, solves because of the increasing of differential-mode current
Greatly, lead to the problems such as reduction of inverter efficiency, noise excessive even inductance saturation.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
Have technology description in required use accompanying drawing be briefly described it should be apparent that, drawings in the following description are these
Some bright embodiments, for those of ordinary skill in the art, without having to pay creative labor, acceptable
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of differential-mode current detection control apparatus embodiment one of the present invention；
Fig. 2 is the typical coupling inductance hardware architecture diagram of inverter；
Fig. 3 is the structural representation of differential-mode current detection control apparatus embodiment two of the present invention；
Fig. 4 is the structural representation of differential-mode current detection control apparatus embodiment three of the present invention；
Fig. 5 is the structural representation of differential-mode current detection control apparatus example IV of the present invention；
Fig. 6 is " t " font three-level inverter structural representation；
The flow chart that Fig. 7 detects control method embodiment one for differential-mode current of the present invention；
The flow chart that Fig. 8 detects control method embodiment two for differential-mode current of the present invention.
Specific embodiment
Purpose, technical scheme and advantage for making the embodiment of the present invention are clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described it is clear that described embodiment is
The a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment being obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.
Fig. 1 is the structural representation of differential-mode current detection control apparatus embodiment one of the present invention, as shown in figure 1, this enforcement
The differential-mode current that at least two coupling inductance 14 that the device 10 of example is used in detection and control circuit produces, this device 10 is permissible
Including: detection module 11, control module 12 and adjustment module 13, wherein, detection module 11 is connected with coupling inductance 14, here
Coupling inductance 14 can include the inductance that two or more mutually have magnetic coupling interaction, the input of control module 12
It is connected with the outfan of detection module 11, the outfan of control module 12 is connected with adjustment module 13.Detection module 11, for right
The corresponding branch road of described at least two coupling inductances carries out differential-mode current detection；Control module 12, for according to described detection mould
The testing result of block obtains differential mode voltage regulated quantity；Adjustment module 13, for according to described differential mode voltage regulated quantity to described extremely
The modulation voltage of the corresponding branch road of few two coupling inductances is adjusted, to reduce the impact of described differential-mode current.
In the present embodiment, differential-mode current detection control apparatus is used at least two in the circuit detect and control inverter
The differential-mode current that individual coupling inductance produces, Fig. 2 is the typical coupling inductance hardware architecture diagram of inverter, such as Fig. 2
Shown, coupling inductance 21a, 21b and 21c are three inductance each other with magnetic coupling interaction, coupling inductance 21a, 21b and
Three input ports 22a, 22b and 22c are corresponded to respectively, right side corresponds to an output port 23, input in parallel afterwards on the left of 21c
The entrance electric current of port 22a, 22b and 22c is respectively i1、i2And i3, the electric current of output port 23 is i, and the above-mentioned sense of current is as schemed
Shown in arrow in 2.Device shown in Fig. 1 can detect the differential-mode current of coupling inductance generation of inverter and it is carried out
Control, specifically, detection module 11 can carry out differential-mode current detection to coupling inductance 21a, 21b and the corresponding branch road of 21c,
Here detection includes routinely detecting whether coupling inductance 21a, 21b and 21c create differential-mode current, and if produces
Differential-mode current, can also provide, to control module 12, the current parameters calculating differential-mode current size；Control module 12 is according to inspection
Survey the corresponding operation of testing result execution of module 11, that is, then control module 12 does not need to execute without producing differential-mode current
Any operation, if creating differential-mode current, control module 12 needs the current parameters meter sending according to detection module 11
Calculate get coupling inductance 21a, 21b and the differential mode voltage regulated quantity of the corresponding branch road of 21c, this differential mode voltage regulated quantity be with respectively
Differential-mode current that branch road produces is related, by eliminate in the voltage actual in circuit differential-mode current corresponding part voltage with
Reach the purpose of the impact eliminating differential-mode current；Adjustment module 13 executes according to the differential mode voltage regulated quantity that control module 12 obtains
Specific voltage adjustment operations, by being adjusted to the modulation voltage of coupling inductance 21a, 21b and the corresponding branch road of 21c, with
Reduce the impact of described differential-mode current, the regulated quantity of voltage can be each branch road corresponding differential mode voltage regulated quantity respectively here,
Voltage after adjusting is separately input to three input ports 22a, 22b and 22c, voltage now has eliminated through processing
The impact of differential-mode current.It should be noted that above-described embodiment illustrates that circuit includes the situation of three coupling inductances,
Assembly of the invention, for equally applicable when two and two or more coupling inductance, is not specifically limited herein.
The device of the present embodiment, by detecting the differential-mode current of the coupling inductance in the circuit of inverter and it being carried out
Control, realize eliminating the purpose of the impact of differential-mode current, solve because of the increase of differential-mode current, lead to inverter efficiency to reduce,
The problems such as noise excessive even inductance saturation.
Fig. 3 is the structural representation of differential-mode current detection control apparatus embodiment two of the present invention, as shown in figure 3, this enforcement
On the basis of Fig. 1 shown device structure, further, detection module 11 can also include at least one Hall and pass the device of example
Sensor 31, detection module 11, specifically for detecting described at least two coupling electricity by least one Hall element 31 described
Feel 14 corresponding branch roads, obtain the entrance current differential of described branch road；It is single that control module 12 can also include differential-mode current decoupling
Unit 32 and differential-mode current adjustment unit 33, wherein, differential-mode current decoupling unit 32, for the described inspection according to described detection module
Survey result and calculate the differential-mode current value that described at least two coupling inductances of acquisition produce respectively, differential-mode current adjustment unit 33, use
Obtain described at least two coupling inductances in the differential-mode current value producing respectively according to described at least two coupling inductances corresponding
The described differential mode voltage regulated quantity of branch road；Adjustment module 13 is specifically for respectively by corresponding of described at least two coupling inductances
The modulation voltage on road deducts corresponding described differential mode voltage regulated quantity, to reduce the impact of described differential-mode current.
Further, the device of the present embodiment can also include power amplifier module 34, this power amplifier module 34 defeated
Enter end to be connected with adjustment module 13, the outfan of power amplifier module 34 is entered with the corresponding branch road of at least two coupling inductance 14
Mouth connects；Power amplifier module 34, for the modulation voltage to the corresponding branch road of described at least two coupling inductances after adjusting
Carry out power amplification, provide input voltage to circulate to the corresponding branch road of described at least two coupling inductances.
The device of the present embodiment, by detecting the differential-mode current of the coupling inductance in the circuit of inverter and it being carried out
Control, realize eliminating the purpose of the impact of differential-mode current, solve because of the increase of differential-mode current, lead to inverter efficiency to reduce,
The problems such as noise excessive even inductance saturation.
Adopt two specific embodiments below, the technical scheme of any device embodiment in Fig. 1～Fig. 3 is carried out in detail
Explanation.
Fig. 4 is the structural representation of differential-mode current detection control apparatus embodiment three of the present invention, as shown in figure 4, inversion is electric
The circuit in source includes three coupling inductances 16a, 16b and 16c, and the labelling at inductance end represents coupling direction, coupling inductance 16a,
Three input ports 17a, 17b and 17c are corresponded to respectively, right side corresponds to an output port in parallel afterwards on the left of 16b and 16c
18, the entrance electric current of input port 17a, 17b and 17c is respectively i1、i2And i3, the electric current of output port 18 is i, above-mentioned electric current
Direction is as shown by the arrows in figure 4.The device of the present embodiment may include that Hall element 11a and 11b, differential-mode current decoupling
Unit 12, differential-mode current adjustment unit 13a, 13b and 13c, adjustment module 14a, 14b and 14c and power amplifier module 15, point
Other detection and the control that coupling inductance 16a, 16b and the corresponding branch road of 16c are carried out with differential-mode current.
In the present embodiment, the electric current i of coupling inductance 16a branch road1Penetrate Hall element from input port 17a forward direction
11a, the electric current i of coupling inductance 16b branch road2Reversely penetrate Hall element 11a from input port 17b, then forward direction penetrates
Hall element 11b, the electric current i of coupling inductance 16c branch road3Reversely penetrate Hall element 11b from input port 17c,
The entrance current differential i that Hall element 11a detection obtains12=i1-i2, the entrance difference between current that Hall element 11b detection obtains
Value i23=i2-i3.Differential-mode current decoupling unit 12 is to obtain each corresponding differential-mode current of coupling inductance branch road, and Hall is passed
The entrance current differential i that sensor 11a and 11b detects12And i23Decoupled by certain operational rule, coupling inductance 16a is propped up
I is used in road, 16b branch road and the corresponding differential-mode current of 16c branch road respectively1、i2And i3Represent, formula (1) can be passed through
i1=i1-(i1+i2+i3)/3;
i2=i2-(i1+i2+i3)/3;(1)
i3=i3-(i1+i2+i3)/3.
It is calculated, in conjunction with i12=i1-i2And i23=i2-i3, obtain coupling inductance 16a, 16b and the corresponding branch road of 16c
Differential-mode current i1、i2And i3Computing formula (2):
i1=(2i12+i23)/3;
i2=(i23-i12)/3;(2)
i3=-(2i23+i12)/3.
Differential-mode current decoupling unit 12 passes through above-mentioned formula (2) and decouples computing to the differential-mode current of three coupling inductance branch roads
After obtain each branch road corresponding differential-mode current i1、i2And i3, differential-mode current adjustment unit 13a, 13b and 13c are respectively to differential mode electricity
Stream i1、i2And i3Carry out differential-mode current regulation according to differential-mode current and obtain differential mode voltage controlled quentity controlled variable v1、v2And v3.Adjustment module 14a
Reference voltage v by coupling inductance 16a branch roadaDeduct differential mode voltage controlled quentity controlled variable v1Obtain final reference modulation voltage v1, adjust
Module 14b is by the reference voltage v of coupling inductance 16b branch roadbDeduct differential mode voltage controlled quentity controlled variable v2Obtain final reference modulation voltage
v2, adjustment module 14c is by the reference voltage v of coupling inductance 16c branch roadcDeduct differential mode voltage controlled quentity controlled variable v3Obtain final reference
Modulation voltage v3.Power amplifier module 15 is by final reference modulation voltage v1、v2And v3Carry out power amplification process, and will be defeated
Go out voltage and deliver to input port 17a, 17b and 17c respectively, this power amplifier module 15 can be such as Sinusoidal Pulse Width Modulation
The modulation measure of (sinusoidal pulse width modulation, abbreviation spwm) and power circuit.
The device of the present embodiment, the differential-mode current being produced by the coupling inductance that above-mentioned handling process makes inverter
Converge to smaller value, even eliminate differential-mode current, it is to avoid because differential-mode current causes the phenomenon of magnetic biasing, solve because of differential-mode current
Increase, lead to inverter efficiency reduce, noise excessive even inductance saturation the problems such as.
Fig. 5 is the structural representation of differential-mode current detection control apparatus example IV of the present invention, as shown in figure 5, this enforcement
The inverter of example is " t " font three-level inverter, and Fig. 6 is " t " font three-level inverter structural representation, as Fig. 6 institute
Show, a, b and c represent three inverters of common bus, each inverter internal has three inverter bridge legs, these three inverter bridge legs carry
120 degree of ripple mutual deviation, passes through coupling inductance 21a, 22a, 23a respectively, and 21b, 22b, 23b and 21c, 22c, 23c carry out parallel connection, then
Export to load after capacitor filtering.The device of the present embodiment also includes voltage and current adjustment module, and voltage and current is adjusted
Completed based on mathematic(al) manipulation coordinate, u_d, u_q and u_z are reference voltage, and u_d ', u_q ' and u_z ' are anti-after coordinate transform
Feedthrough voltage, two groups of voltage correspondences seek after the recovery passing ratio integration (proportional integral, abbreviation pi) actuator, defeated
Inductive current set-point i_d ', i_q ' and i_z ', inductance electricity is obtained after the electric current going out addition corresponding with electric current i_d, i_q and i_z
Stream set-point corresponding with inductor current feedback i_l_d, i_l_q and i_l_z ask after the recovery passing ratio (proportional, referred to as
P) actuator obtains modulation voltage u_dm, u_qm and u_zm plus reference voltage u_d, u_q and u_z more respectively, and mathematic(al) manipulation is sat
Mark modulated voltage obtains synchronously rotating reference frame modulated voltage u_am, u_bm and u_cm after coordinate transform, u_am, u_bm and
U_cm respectively with corresponding differential mode voltage controlled quentity controlled variable va1, va2 and va3, vb1, vb2 and vb3, vc1, vc2 and vc3 subtract each other and obtain
The corresponding modulation voltage of each coupling inductance branch road, then send out ripple and control through spwm and obtain that each coupling inductance brachium pontis is corresponding to drive letter
Number, through drive circuit control bridge arm switch pipe turn-on and turn-off, obtain required voltage, and differential-mode current effectively can be controlled
System.
In the present embodiment, differential mode voltage controlled quentity controlled variable va1, va2 and va3, vb1, vb2 and vb3, the acquisition of vc1, vc2 and vc3
Process is similar with the handling process shown in Fig. 4, and difference is, only obtains one group of three coupling inductance branch road corresponding in Fig. 4
Differential mode voltage controlled quentity controlled variable, has the corresponding inverter of three groups of three coupling inductances in the present embodiment, therefore, obtain differential mode voltage and control
Amount needs corresponding three groups of devices, and specifically here is omitted.It should be noted that the present embodiment is the act to three groups of inverters
Example explanation, the device of the present embodiment can be used for the differential-mode current of the coupling inductance of least one set inverter being detected and controlling
System, is not specifically limited herein.
The device of the present embodiment, is detected by the differential-mode current of the coupling inductance generation to multigroup inverter and is controlled
System makes the differential-mode current to converge to smaller value, even eliminates differential-mode current, it is to avoid because differential-mode current causes the phenomenon of magnetic biasing,
Solve because of the increase of differential-mode current, lead to the problems such as reduction of inverter efficiency, noise excessive even inductance saturation.
The flow chart that Fig. 7 detects control method embodiment one for differential-mode current of the present invention, as shown in fig. 7, the present embodiment
Method may include that
Step 101, differential-mode current detection is carried out to the corresponding branch road of at least two coupling inductances in circuit；
The executive agent of the present embodiment can be that the differential-mode current detection shown in Fig. 1～Fig. 5 any device embodiment controls
Device.The differential-mode current producing for the coupling inductance that inverter is monitored and controlled, differential-mode current detection control apparatus needs
First detect the differential-mode current of coupling inductance.
Step 102, according to differential-mode current testing result obtain differential mode voltage regulated quantity；
In the present embodiment, differential-mode current detection control apparatus is according to the corresponding operation of testing result execution, if coupling electricity
Sense does not produce differential-mode current, then not needing the electric current in circuit is controlled, if detecting differential-mode current, needing
Get regulated quantity, the present embodiment is the purpose reaching the impact eliminating differential-mode current by adjusting voltage.
Step 103, the modulation to the corresponding branch road of described at least two coupling inductances according to described differential mode voltage regulated quantity
Voltage is adjusted, to reduce the impact of described differential-mode current.
In the present embodiment, differential-mode current detection control apparatus is carried out to each coupling inductance branch road according to differential mode voltage regulated quantity
Voltage-regulation, due to having eliminated the corresponding voltage of differential-mode current in voltage, the voltage after adjusting is re-entered inverse
The impact of differential-mode current is reduced in the circuit of variable power source.
The present embodiment, by detecting the differential-mode current of coupling inductance in the circuit of inverter and controlling it,
Realize eliminating the purpose of the impact of differential-mode current, solve because of the increase of differential-mode current, lead to the reduction of inverter efficiency, noise mistake
The problems such as big even inductance saturation.
The flow chart that Fig. 8 detects control method embodiment two for differential-mode current of the present invention, as shown in figure 8, the present embodiment
Method may include that
Step 201, by least one Hall element detect the corresponding branch road of described at least two coupling inductances, obtain
The entrance current differential of described branch road；
The executive agent of the present embodiment can be that the differential-mode current detection shown in Fig. 1～Fig. 5 any device embodiment controls
Device.The corresponding branch road of described at least two coupling inductances is detected by Hall element, obtains the entrance electric current of described branch road
The process that the process of difference Hall element 11a with 11b as shown in Figure 4 obtains entrance current differential is similar, herein no longer
Repeat.
Step 202, calculated according to the entrance current differential of described branch road and obtain described at least two coupling inductances and produce respectively
Raw differential-mode current value；
In the present embodiment, the entrance current differential according to described branch road calculates and obtains described at least two coupling inductances respectively
The differential-mode current value producing can be obtained using the computational methods of the formula (1) in the embodiment shown in Fig. 4 and formula (2), this
Place repeats no more.
Step 203, the described difference according to the described differential-mode current value acquisition corresponding branch road of described at least two coupling inductances
Mode voltage regulated quantity；
In the present embodiment, according to described differential-mode current value obtains the corresponding branch road of described at least two coupling inductances
Differential mode voltage regulated quantity can be realized to voltage regulator using existing electric current, be not specifically limited herein.
Step 204, respectively the modulation voltage of corresponding for described at least two coupling inductances branch road is deducted corresponding described
Differential mode voltage regulated quantity, to reduce the impact of described differential-mode current；
In the present embodiment, the reference voltage of coupling inductance branch road is deducted differential mode voltage controlled quentity controlled variable and obtains final reference tune
Voltage processed, similar with the process shown in Fig. 4, here is omitted.
Step 205, the modulation voltage to the corresponding branch road of described at least two coupling inductances after adjusting carry out power and put
Greatly, provide input voltage to circulate to the corresponding branch road of described at least two coupling inductances.
In the present embodiment, the modulation measure of such as spwm and power circuit can be adopted to carry out power to modulation voltage and put
Greatly, and by the voltage input coupling inductive branch again after amplifying, to eliminate the impact of differential-mode current.
The present embodiment, by detecting the differential-mode current of coupling inductance in the circuit of inverter and controlling it,
Realize eliminating the purpose of the impact of differential-mode current, solve because of the increase of differential-mode current, lead to the reduction of inverter efficiency, noise mistake
The problems such as big even inductance saturation.
One of ordinary skill in the art will appreciate that: all or part of step realizing above-mentioned each method embodiment can be led to
Cross the related hardware of programmed instruction to complete.Aforesaid program can be stored in a computer read/write memory medium.This journey
Sequence upon execution, executes the step including above-mentioned each method embodiment；And aforesaid storage medium includes: rom, ram, magnetic disc or
Person's CD etc. is various can be with the medium of store program codes.
Finally it is noted that various embodiments above, only in order to technical scheme to be described, is not intended to limit；To the greatest extent
Pipe has been described in detail to the present invention with reference to foregoing embodiments, it will be understood by those within the art that: its according to
So the technical scheme described in foregoing embodiments can be modified, or wherein some or all of technical characteristic is entered
Row equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (8)
1. a kind of differential-mode current detection control apparatus is it is characterised in that described device is used in detection and control circuit at least
The differential-mode current that two coupling inductances produce, described device includes: detection module, control module and adjustment module, described inspection
Survey module to be connected with described coupling inductance, the input of described control module is connected with the outfan of described detection module, described
The outfan of control module is connected with described adjustment module；
Wherein, described detection module, carries out differential-mode current detection for branch road corresponding to described at least two coupling inductances；
Described control module, obtains differential mode voltage regulated quantity for the testing result according to described detection module；
Described control module, including differential-mode current decoupling unit and differential-mode current adjustment unit；
Described differential-mode current decoupling unit, calculates at least two described in acquisition for the described testing result according to described detection module
The differential-mode current value that individual coupling inductance produces respectively；
Described differential-mode current adjustment unit, the differential-mode current value for being produced respectively according to described at least two coupling inductances obtains
The described differential mode voltage regulated quantity of the corresponding branch road of described at least two coupling inductances；
Described adjustment module, for according to described differential mode voltage regulated quantity to the corresponding branch road of described at least two coupling inductances
Modulation voltage is adjusted, to reduce the impact of described differential-mode current.
2. device according to claim 1 is it is characterised in that described detection module includes at least one Hall element；
Described detection module, specifically for detecting described at least two coupling inductances pair by least one Hall element described
The branch road answered, obtains the entrance current differential of described branch road.
3. device according to claim 1 and 2 it is characterised in that described adjustment module specifically for respectively by described extremely
The modulation voltage of the corresponding branch road of few two coupling inductances deducts corresponding described differential mode voltage regulated quantity, to reduce described differential mode
The impact of electric current.
4. device according to claim 1 and 2 is it is characterised in that also include: power amplifier module, described power amplification
The input of module is connected with described adjustment module, the outfan of described power amplifier module and described at least two coupling inductances
The entrance of corresponding branch road connects；
Described power amplifier module, for entering to the modulation voltage of the corresponding branch road of described at least two coupling inductances after adjusting
Row power amplification, provides input voltage to circulate to the corresponding branch road of described at least two coupling inductances.
5. a kind of differential-mode current detection control method is it is characterised in that methods described is applied to any one of Claims 1 to 4
Described differential-mode current detection control apparatus, methods described includes:
Differential-mode current detection is carried out to the corresponding branch road of at least two coupling inductances in circuit；
Differential mode voltage regulated quantity is obtained according to differential-mode current testing result；
According to described differential mode voltage regulated quantity, the modulation voltage of the corresponding branch road of described at least two coupling inductances is adjusted,
To reduce the impact of described differential-mode current；
Described according to differential-mode current testing result obtain differential mode voltage regulated quantity, comprising:
Entrance current differential according to described branch road calculates and obtains the differential-mode current that described at least two coupling inductances produce respectively
Value；
Obtain the described differential mode voltage regulated quantity of the corresponding branch road of described at least two coupling inductances according to described differential-mode current value.
6. method according to claim 5 is it is characterised in that described corresponding at least two coupling inductances in circuit
Branch road carries out differential-mode current detection, comprising:
The corresponding branch road of described at least two coupling inductances is detected by least one Hall element, obtains entering of described branch road
Mouth current differential.
7. the method according to claim 5 or 6 it is characterised in that described according to described differential mode voltage regulated quantity to described
The modulation voltage of the corresponding branch road of at least two coupling inductances is adjusted, to reduce the impact of described differential-mode current, comprising:
Respectively the modulation voltage of corresponding for described at least two coupling inductances branch road is deducted corresponding described differential mode voltage to adjust
Amount, to reduce the impact of described differential-mode current.
8. the method according to claim 5 or 6 it is characterised in that described according to described differential mode voltage regulated quantity to described
The modulation voltage of the corresponding branch road of at least two coupling inductances is adjusted, with reduce described differential-mode current impact after, also
Including:
Power amplification is carried out to the modulation voltage of the corresponding branch road of described at least two coupling inductances after adjusting, to circulate to institute
Stating the corresponding branch road of at least two coupling inductances provides input voltage.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6366483B1 (en) * | 2000-07-24 | 2002-04-02 | Rockwell Automation Technologies, Inc. | PWM rectifier having de-coupled power factor and output current control loops |
| CN101335491A (en) * | 2007-06-27 | 2008-12-31 | 通用电气公司 | Cross current control for power converter system |
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| US6366483B1 (en) * | 2000-07-24 | 2002-04-02 | Rockwell Automation Technologies, Inc. | PWM rectifier having de-coupled power factor and output current control loops |
| CN101335491A (en) * | 2007-06-27 | 2008-12-31 | 通用电气公司 | Cross current control for power converter system |
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