CN108565979A - A kind of radio energy dynamic constant power output system and its equivalent resistance control method - Google Patents
A kind of radio energy dynamic constant power output system and its equivalent resistance control method Download PDFInfo
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- CN108565979A CN108565979A CN201810426215.8A CN201810426215A CN108565979A CN 108565979 A CN108565979 A CN 108565979A CN 201810426215 A CN201810426215 A CN 201810426215A CN 108565979 A CN108565979 A CN 108565979A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
- H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
- H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Power Engineering (AREA)
- Current-Collector Devices For Electrically Propelled Vehicles (AREA)
Abstract
The invention discloses a kind of radio energy dynamic constant power output system and its equivalent resistance control methods,It is related to radio energy dynamic transmission technical field,The present invention includes transmitting terminal and receiving terminal,Transmitting terminal includes transmit coil Lp,Receiving terminal includes the secondary component 2 in component 1 and pair being connect with load R,Secondary side component 1 includes the receiving coil Ls1 parallel with transmit coil Lp,Secondary side component 2 includes the receiving coil Ls2 parallel with transmit coil Lp,Receiving coil Ls1 and receiving coil Ls2 is made of the square coil that the length of side is L respectively,Transmit coil Lp is made of the square coil cascade that several length of sides are L,Receiving coil Ls1 and receiving coil Ls2 overlaps secondary coil group,And the length of lap is L/2,The present invention's ensures that general power is in the secondary receiving terminal in component 1 and mean allocation in the receiving terminal of component 2 when pair in moving process,The voltage and current stress of switching tube can not only be reduced,And it ensure that system output power is constant.
Description
Technical field
The present invention relates to rail traffic radio energy dynamic transmission technical fields, more particularly to a kind of radio energy
Dynamic constant power output system and its equivalent resistance control method.
Background technology
Radio energy transmission system utilizes electromagnetic field of high frequency near-field coupling principle, using high frequency magnetic field as transmission medium, leads to
The magnetic coupling crossed between transmit coil and receiving coil realizes the wireless transmission of electric energy.Radio energy transmission system is mainly by two
Part forms, and a part is the transmitting terminal for being connected to power supply side, and another part is the receiving terminal positioned at load-side, and energy passes through
The mode of electromagnetic induction is transferred to receiving terminal by transmitting terminal.Existing radio energy transmission system is mainly by the direct current of transmitting terminal
Source, inverter, transmit coil and the receiving coil of transmission compensating electric capacity and receiving terminal receive compensating electric capacity, rectifier and bear
Carry composition.
The electrical equipment of the overwhelming majority is mainly charged using conventional contacts power supply mode at present, and this charging modes are deposited
Charging current it is big, it is heavy and unsightly, the security risks such as mechanical wear and electric leakage.Wireless power transmission technology can be very good
Overcome above-mentioned drawback, has many advantages, such as that convenient, beautiful, safety and flexibility are high.It is answered to electrical equipment charging in specified region
Technology is referred to as stationary radio energy transmission technology, however, static wireless charging technology is by current energy-storage battery technology
The restriction of development, there are problems, such as continued a journey, short, the charging time is long, frequent charge, battery pack heaviness.Based on this back of the body
Scape, people have started the research to dynamic radio power supply technique, and dynamic radio power supply technique is applied to electric vehicle, track
The fields such as traffic.
The electrical equipment in traveling is given to provide energy in a non-contact manner, equipment can carry lighter battery pack, simultaneously
It can solve the problems, such as that course continuation mileage is short, reduce manufacturing cost.However, studies at home and abroad show that, the transmission of dynamic radio electric energy is compared
It can be transmitted in stationary radio, coefficient of coup variation is fluctuated greatly, for example horizontal and vertical offset of variation of spatial position so that system
Output power and working efficiency are unstable, it is difficult to be suitble to fast moving for receiving terminal.
Invention content
It is an object of the invention to：In order to solve in field of track traffic, existing dynamic radio electric energy transmission technology by
Offset variation in spatial position, coefficient of coup variation fluctuation is larger to be led to not ensure the problem of system power stablizes output,
A kind of radio energy dynamic constant power output system of present invention offer and its equivalent resistance control method.
The present invention specifically uses following technical scheme to achieve the goals above：
A kind of radio energy dynamic constant power output system, including transmitting terminal and receiving terminal, transmitting terminal include transmit coil
Lp, it is characterised in that：The receiving terminal includes the secondary component 2 in component 1 and pair being connect respectively with load R, and secondary side component 1 wraps
Include the receiving coil Ls1 parallel with transmit coil Lp, secondary side component 2 includes the receiving coil Ls2 parallel with transmit coil Lp, institute
It states receiving coil Ls1 and receiving coil Ls2 to be made of the square coil that the length of side is L respectively, transmit coil Lp is by several sides
The square coil cascade composition of a length of L, receiving coil Ls1 and receiving coil Ls2 overlaps secondary coil group, and receives line
The length for enclosing Ls1 and receiving coil Ls2 laps is L/2.
Further, the transmitting terminal further includes DC power supply E, full-bridge inverter I1, sends resonant inductance Lt and transmission
Compensating electric capacity Cp, DC power supply E are connect with full-bridge inverter I1, and full-bridge inverter I1 is by transmission resonant inductance Lt and mutually simultaneously
The transmit coil Lp of connection is connected with compensating electric capacity Cp is sent.
Further, the secondary side component 1 further includes receiving compensating electric capacity Cs1, full-controlled rectifier device H1 and DC filtering electricity
Hold Cd1, receiving coil Ls1 with receive compensating electric capacity Cs1 series connection after connect with full-controlled rectifier device H1, full-controlled rectifier device H1 and with bear
Carry the DC filter capacitor Cd1 connections of R parallel connections；
Pair side component 2 further includes receiving compensating electric capacity Cs2, full-controlled rectifier device H2 and DC filter capacitor Cd2, is received
Coil Ls2 is connect with after reception compensating electric capacity Cs2 series connection with full-controlled rectifier device H2, and full-controlled rectifier device H2 is in parallel with load R
DC filter capacitor Cd2 connections.
Further, the full-controlled rectifier device H1, which is connected with, receives side controller KP1, and full-controlled rectifier device H2 is connected with reception
Side controller KP2 receives side controller KP1 and is connected with the output voltage U for being respectively used to survey secondary side component 1O1DC voltage pass
Sensor UO1 and output current IO1DC current sensor IO1；Reception side controller KP2, which is connected with, is respectively used to survey secondary side group
The output voltage U of part 2O2Direct current voltage sensor UO2 and output current IO2DC current sensor IO2.
When secondary coil group moves X length along the length direction for being parallel to transmit coil Lp, system of the invention work
Principle is：
Mutual inductance M between transmit coil Lp and receiving coil Ls11Meet：
M1=Mmax1·sin(A·X+B)
Mutual inductance M between transmit coil Lp and receiving coil Ls22Meet：
M2=Mmax2·cos(A·X+B)
Wherein, Mmax1It is mutual inductance maximum values of the transmit coil Lp to receiving coil Ls1, Mmax2It is transmit coil Lp to receiving
The mutual inductance maximum value of coil Ls2, Mmax1And Mmax2Identical, A, B are coefficient；
Since the length of receiving coil Ls1 and receiving coil Ls2 laps is L/2, so mutual inductance M1With mutual inductance M2In pair
Always meet the relationship of same 90 ° of trigonometric function phase mutual deviation during the coil group movement of side, i.e.,：
M1 2+M2 2=Mmax 2, wherein Mmax=Mmax1=Mmax2；
Receiving coil Ls1 and receiving coil Ls2 in the present invention is in such a way that overlapping couples, when the knot of secondary coil group
After structure is fixed, MmaxIt is fixed value, thus, it is possible to ensure mutual inductance M1With mutual inductance M2Quadratic sum secondary coil group moving process
In remain unchanged, for dynamic power system power stablize output lay a good foundation.
A kind of control method of radio energy dynamic invariable power Transmission system equivalent resistance, includes the following steps：
S1, equivalent resistance R undeterminedLeqCalculating
It calculates on front side of full-controlled rectifier device H1 input terminals and needs to control on front side of full-controlled rectifier device H2 input terminals undetermined equivalent
Resistance RLeq：
RLeq=ω MT
Wherein, ω is output system work angular frequency, MTMutual inductance value between receiving coil Ls1 and receiving coil Ls2；
The calculating of S2, practical equivalent resistance
It receives side controller KP1 and receives the output voltage U that direct current voltage sensor UO1 is measuredO1It is sensed with DC current
The output current I that device IO1 is measuredO1, obtain the load resistance R at current timeL1=Uo1/Io1, conversion to the front sides full-controlled rectifier device H1
Practical equivalent resistance RLeq1：
It receives side controller KP2 and receives the output voltage U that direct current voltage sensor UO2 is measuredO2It is sensed with DC current
The output current I that device IO2 is measuredO2, obtain the load resistance R at current timeL2=Uo2/Io2, conversion to the front sides full-controlled rectifier device H2
Practical equivalent resistance RLeq2：
Wherein, β1For the angle of flow of full-controlled rectifier device H1, β2For the angle of flow of full-controlled rectifier device H2；
The realization of S3, constant power output
Angle of flow β is controlled respectively by receiving side controller KP1 and receiving side controller KP21、β2, realize RLeq1=RLeq2
=RLeq, when meeting RLeq1=RLeq2=RLeqAfterwards, the output power P of secondary side component 1S1With the output power P of secondary side component 2S2Point
It is not：
Wherein, E is the input voltage value of DC power supply E, LtIt is the inductance value for sending resonant inductance Lt；
Thus P is obtainedS1=PS2, and due to M1 2+M2 2=Mmax 2Fixed value, then it is secondary in component 1 and component 2 when pair
Output power remains unchanged in moving process, and then system total power is also kept constant, and realizes constant power output.
Beneficial effects of the present invention are as follows：
1, the receiving coil Ls1 in the present invention and receiving coil Ls2 is in such a way that overlapping couples, and receiving coil
The length of Ls1 and receiving coil Ls2 laps are L/2, ensure that mutual inductance M11/4 period of curve phase shift obtains mutual inductance M2Curve,
Mutual inductance M21/4 period of curve phase shift obtains mutual inductance M1Curve, mutual inductance M1With mutual inductance M2Quadratic sum being moved through in secondary coil group
It remains unchanged in journey, lays a good foundation for the system power stabilization output of dynamic power.
2, the present invention can control full-controlled rectifier device H1 and full-controlled rectifier device during secondary coil group is moved and powered
Equivalent resistance on front side of H2 is steady state value, which is determined by the mutual inductance value of coupling of receiving coil Ls1 and receiving coil Ls2, is ensured
General power of the secondary coil group in moving process the secondary receiving terminal in component 1 and it is secondary while component 2 receiving terminal in it is average
Distribution, can not only reduce the voltage and current stress of switching tube, and ensure that system output power is constant.
Description of the drawings
Fig. 1 is the circuit structure diagram of the present invention.
Fig. 2 is the coupled structure figure of receiving coil Ls1 and receiving coil Ls2 of the present invention.
Specific implementation mode
In order to which those skilled in the art are better understood from the present invention, below in conjunction with the accompanying drawings with following embodiment to the present invention
It is described in further detail.
Embodiment 1
As shown in Figure 1, the present embodiment provides a kind of radio energy dynamic constant power output system, including transmitting terminal and reception
End, transmitting terminal include transmit coil Lp, and receiving terminal includes the secondary component 2 in component 1 and pair being connect respectively with load R, secondary side
Component 1 includes the receiving coil Ls1 parallel with transmit coil Lp, and secondary side component 2 includes the reception line parallel with transmit coil Lp
Circle Ls2, the receiving coil Ls1 and receiving coil Ls2 are made of the square coil that the length of side is L respectively, and transmit coil Lp is by 4
The square coil cascade composition that a length of side is L, receiving coil Ls1 and receiving coil Ls2 overlaps secondary coil group, and connects
The length of take-up circle Ls1 and receiving coil Ls2 laps is L/2.
The transmitting terminal further includes DC power supply E, full-bridge inverter I1, sends resonant inductance Lt and send compensating electric capacity
Cp, DC power supply E are connect with full-bridge inverter I1, and full-bridge inverter I1 is by sending resonant inductance Lt and transmission parallel with one another
Coil Lp is connected with compensating electric capacity Cp is sent.
Pair side component 1 further includes receiving compensating electric capacity Cs1, full-controlled rectifier device H1 and DC filter capacitor Cd1, is received
Coil Ls1 is connect with after reception compensating electric capacity Cs1 series connection with full-controlled rectifier device H1, and full-controlled rectifier device H1 is in parallel with load R
DC filter capacitor Cd1 connections；Pair side component 2 further includes receiving compensating electric capacity Cs2, full-controlled rectifier device H2 and DC filtering
Capacitance Cd2, receiving coil Ls2 with receive compensating electric capacity Cs2 series connection after connect with full-controlled rectifier device H2, full-controlled rectifier device H2 and with
Load the DC filter capacitor Cd2 connections of R parallel connections.
The full-controlled rectifier device H1, which is connected with, receives side controller KP1, and full-controlled rectifier device H2 is connected with reception side controller
KP2 receives side controller KP1 and is connected with the output voltage U for being respectively used to survey secondary side component 1O1Direct current voltage sensor UO1 and
Output current IO1DC current sensor IO1；It receives side controller KP2 and is connected with the output for being respectively used to survey secondary side component 2
Voltage UO2Direct current voltage sensor UO2 and output current IO2DC current sensor IO2.
As shown in Fig. 2, when a square coil face of receiving coil Ls1 and transmit coil Lp, receiving coil Ls2
It is placed exactly in the middle of that square coil and the latter positive direction coil, when secondary coil group is moved along positive direction of the y-axis
When dynamic X length,
Mutual inductance M between transmit coil Lp and receiving coil Ls11Meet：
M1=Mmax1·sin(A·X+B)
Mutual inductance M between transmit coil Lp and receiving coil Ls22Meet：
M2=Mmax2·cos(A·X+B)
Wherein, Mmax1It is mutual inductance maximum values of the transmit coil Lp to receiving coil Ls1, Mmax2It is transmit coil Lp to receiving
The mutual inductance maximum value of coil Ls2, A, B are coefficient；When transmit coil Lp respectively with receiving coil Ls1 and receiving coil Ls2 faces
When, there are mutual inductance maximum value Mmax1And Mmax2, and Mmax1And Mmax2It is identical；
Since the length of receiving coil Ls1 and receiving coil Ls2 laps is L/2, so mutual inductance M1With mutual inductance M2In pair
Always meet the relationship of same 90 ° of trigonometric function phase mutual deviation during the coil group movement of side, i.e.,：
M1 2+M2 2=Mmax 2, wherein Mmax=Mmax1=Mmax2；
Receiving coil Ls1 and receiving coil Ls2 in the present embodiment is in such a way that overlapping couples, when secondary coil group
After structure is fixed, MmaxIt is fixed value, thus, it is possible to ensure mutual inductance M1With mutual inductance M2Quadratic sum being moved through in secondary coil group
It remains unchanged in journey, lays a good foundation for the system power stabilization output of dynamic power.
A kind of control method of radio energy dynamic invariable power Transmission system equivalent resistance, includes the following steps：
S1, equivalent resistance R undeterminedLeqCalculating
It calculates on front side of full-controlled rectifier device H1 input terminals and needs to control on front side of full-controlled rectifier device H2 input terminals undetermined equivalent
Resistance RLeq：
RLeq=ω MT
Wherein, ω is output system work angular frequency, MTMutual inductance value between receiving coil Ls1 and receiving coil Ls2；
The calculating of S2, practical equivalent resistance
It receives side controller KP1 and receives the output voltage U that direct current voltage sensor UO1 is measuredO1It is sensed with DC current
The output current I that device IO1 is measuredO1, obtain the load resistance R at current timeL1=Uo1/Io1, conversion to the front sides full-controlled rectifier device H1
Practical equivalent resistance RLeq1：
It receives side controller KP2 and receives the output voltage U that direct current voltage sensor UO2 is measuredO2It is sensed with DC current
The output current I that device IO2 is measuredO2, obtain the load resistance R at current timeL2=Uo2/Io2, conversion to the front sides full-controlled rectifier device H2
Practical equivalent resistance RLeq2：
Wherein, β1For the angle of flow of full-controlled rectifier device H1, β2For the angle of flow of full-controlled rectifier device H2；
The realization of S3, constant power output
It receives side controller KP1 and receives side controller KP2 and realized respectively to angle of flow β by PI controllers1And β2Control
System realizes RLeq1=RLeq2=RLeq, when meeting RLeq1=RLeq2=RLeqAfterwards, the output power P of secondary side component 1S1With secondary side component
2 output power PS2Respectively：
Wherein, E is the input voltage value of DC power supply E, LtIt is the inductance value for sending resonant inductance Lt；
Thus P is obtainedS1=PS2, and due to M1 2+M2 2=Mmax 2Fixed value, then it is secondary in component 1 and component 2 when pair
Output power remains unchanged in moving process, and then system total power is also kept constant, and realizes constant power output.
The above, only presently preferred embodiments of the present invention, are not intended to limit the invention, patent protection model of the invention
It encloses and is subject to claims, equivalent structure variation made by every specification and accompanying drawing content with the present invention, similarly
It should be included within the scope of the present invention.
Claims (6)
1. a kind of radio energy dynamic constant power output system, including transmitting terminal and receiving terminal, transmitting terminal include transmit coil Lp,
It is characterized in that：The receiving terminal includes the secondary component 2 in component 1 and pair being connect respectively with load R, and secondary side component 1 includes
The receiving coil Ls1 parallel with transmit coil Lp, secondary side component 2 includes parallel with transmit coil Lp receiving coil Ls2, described
Receiving coil Ls1 and receiving coil Ls2 is made of the square coil that the length of side is L respectively, and transmit coil Lp is by several length of sides
Composition is cascaded for the square coil of L, receiving coil Ls1 and receiving coil Ls2 overlaps secondary coil group, and receiving coil
The length of Ls1 and receiving coil Ls2 laps is L/2.
2. a kind of radio energy dynamic constant power output system according to claim 1, it is characterised in that：The transmitting terminal
Further include DC power supply E, full-bridge inverter I1, send resonant inductance Lt and send compensating electric capacity Cp, DC power supply E and full-bridge are inverse
Become device I1 connections, full-bridge inverter I1 is by sending resonant inductance Lt and transmit coil Lp parallel with one another and sending compensating electric capacity
Cp connections.
3. a kind of radio energy dynamic constant power output system according to claim 1 or 2, it is characterised in that：The pair
Side component 1 further includes receiving compensating electric capacity Cs1, full-controlled rectifier device H1 and DC filter capacitor Cd1, receiving coil Ls1 and receiving
It is connect with full-controlled rectifier device H1 after compensating electric capacity Cs1 series connection, DC filter capacitor in parallel with load R full-controlled rectifier device H1
Cd1 connections；
Pair side component 2 further includes receiving compensating electric capacity Cs2, full-controlled rectifier device H2 and DC filter capacitor Cd2, receiving coil
Ls2 is connect with after reception compensating electric capacity Cs2 series connection with full-controlled rectifier device H2, direct current in parallel with load R full-controlled rectifier device H2
Filter capacitor Cd2 connections.
4. a kind of radio energy dynamic constant power output system according to claim 3, it is characterised in that：It is described control entirely it is whole
Stream device H1, which is connected with, receives side controller KP1, and full-controlled rectifier device H2, which is connected with, receives side controller KP2, receives side controller KP1
It is connected with the output voltage U for being respectively used to survey secondary side component 1O1Direct current voltage sensor UO1 and output current IO1Direct current
Flow sensor IO1；It receives side controller KP2 and is connected with the output voltage U for being respectively used to survey secondary side component 2O2DC voltage pass
Sensor UO2 and output current IO2DC current sensor IO2.
5. a kind of control method of radio energy dynamic invariable power Transmission system equivalent resistance, which is characterized in that including following step
Suddenly：
S1, equivalent resistance R undeterminedLeqCalculating
It calculates on front side of full-controlled rectifier device H1 input terminals and needs the equivalent resistance undetermined controlled on front side of full-controlled rectifier device H2 input terminals
RLeq：
RLeq=ω MT；
Wherein, ω is output system work angular frequency, MTMutual inductance value between receiving coil Ls1 and receiving coil Ls2；
The calculating of S2, practical equivalent resistance
It receives side controller KP1 and receives the output voltage U that direct current voltage sensor UO1 is measuredO1With DC current sensor IO1
The output current I measuredO1, obtain the load resistance R at current timeL1=Uo1/Io1, convert the reality on front side of full-controlled rectifier device H1
Border equivalent resistance RLeq1：
It receives side controller KP2 and receives the output voltage U that direct current voltage sensor UO2 is measuredO2With DC current sensor IO2
The output current I measuredO2, obtain the load resistance R at current timeL2=Uo2/Io2, convert the reality on front side of full-controlled rectifier device H2
Border equivalent resistance RLeq2：
Wherein, β1For the angle of flow of full-controlled rectifier device H1, β2For the angle of flow of full-controlled rectifier device H2；
The realization of S3, constant power output
Angle of flow β is controlled respectively by receiving side controller KP1 and receiving side controller KP21、β2, realize RLeq1=RLeq2=
RLeq, system total power will keep constant in the moving process of secondary coil group, realize constant power output.
6. a kind of control method of radio energy dynamic invariable power Transmission system equivalent resistance according to claim 5,
It is characterized in that：Side controller KP1 is received in the S3 and receives side controller KP2 is realized respectively to the angle of flow by PI controllers
β1And β2Control.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810426215.8A CN108565979B (en) | 2018-05-07 | 2018-05-07 | Wireless electric energy dynamic constant power output system and equivalent resistance control method thereof |
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| CN201810426215.8A CN108565979B (en) | 2018-05-07 | 2018-05-07 | Wireless electric energy dynamic constant power output system and equivalent resistance control method thereof |
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| CN108565979B CN108565979B (en) | 2022-03-04 |
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| CN111245075A (en) * | 2020-03-24 | 2020-06-05 | 四川航天系统工程研究所 | Wireless charging circuit and parameter selection method for realizing constant-power wireless charging |
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| CN111245075A (en) * | 2020-03-24 | 2020-06-05 | 四川航天系统工程研究所 | Wireless charging circuit and parameter selection method for realizing constant-power wireless charging |
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| Publication number | Publication date |
|---|---|
| CN108565979B (en) | 2022-03-04 |
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