CN209844651U - Three-phase excitation type capacitive wireless power transmission system - Google Patents
Three-phase excitation type capacitive wireless power transmission system Download PDFInfo
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- CN209844651U CN209844651U CN201920576387.3U CN201920576387U CN209844651U CN 209844651 U CN209844651 U CN 209844651U CN 201920576387 U CN201920576387 U CN 201920576387U CN 209844651 U CN209844651 U CN 209844651U
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Abstract
The utility model relates to a wireless power transmission technology, concretely relates to three-phase excitation formula capacitive wireless power transmission system, including the power module, three-phase non-contact electric power coupling mechanism that connect gradually side compensating circuit, three-phase non-contact electric power coupling mechanism secondary side compensating circuit and load module. The transmission system adopts a plurality of power transmission channels, and equivalent coupling capacitance is increased, so that the power transmission of the system is increased, and the energy transmission efficiency is improved; meanwhile, the three-phase four-wire circuit structure enables the potential of the three-phase connection node of the circuit to be zero all the time, so that the output of the circuit can still be kept unchanged when the parameters of the circuit are changed due to the dislocation of the coupling polar plate, and the influence of the dislocation of the coupling polar plate on the resonance and output characteristics of the system is reduced.
Description
Technical Field
The utility model belongs to the technical field of wireless power transmission, especially, relate to a three-phase excitation formula capacitive wireless power transmission system.
Background
At present, researches on a resonant magnetic coupling wireless power transmission structure mainly focus on a single transmission channel structure, and researches on multiple transmission channels are few. With the increasing demand of high-power wireless electric energy transmission of electric vehicles and the like, the wireless energy transmission mode with a single transmission channel is adopted, and the problems of small coupling capacitance, small transmission power, low transmission efficiency and the like exist. Meanwhile, wireless power transmission adopts a non-contact power supply mode, and the transmitting end and the receiving end of the power tend to move relatively to generate dislocation. The parameters of the non-contact power coupling mechanism are changed due to dislocation, and particularly, the parameters such as the coupling coefficient of the coupling mechanism, the self inductance of the primary and secondary windings, the mutual inductance and the like are easy to change obviously, so that the resonance and output characteristics of the circuit are greatly changed, and the safety and stability of the operation of the system are influenced. Therefore, reducing the influence of the misalignment between the transmitting end and the receiving end on the circuit is an important content for improving the controllability and stability of the wireless power transmission system.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can realize the high-power energy transmission of multichannel, and can avoid because the dislocation of coupling polar plate causes the wireless biography ability structure of the high-power capacitive of three-phase of influence to circuit resonance and output characteristic.
In order to achieve the above object, the present invention provides a three-phase excitation type capacitive wireless power transmission system, which comprises a power module, a three-phase non-contact power coupling mechanism, a primary side compensation circuit, a three-phase non-contact power coupling mechanism, a secondary side compensation circuit and a load module, which are connected in sequence.
In the three-phase excitation type capacitive wireless power transmission system, the three-phase non-contact power coupling mechanism comprises three pairs of first, second and third pairs of coupling polar plates which are the same and are arranged in parallel; the primary side polar plate and the secondary side polar plate of the first pair of coupling polar plates, the second pair of coupling polar plates and the third pair of coupling polar plates are opposite, the material, the structure, the distance between the transmitting polar plate and the receiving polar plate and the distance between the adjacent coupling polar plates are the same, and all groups of polar plates are not coupled with each other.
In the three-phase excited capacitive wireless power transmission system, the primary side compensation circuit of the three-phase contactless power coupling mechanism includes a first, a third and a fifth set of compensation circuits, and the secondary side compensation circuit of the three-phase contactless power coupling mechanism includes a second, a fourth and a sixth set of compensation circuits; the first group of compensation circuits comprises a first compensation capacitor and a first inductor; the second group of compensation circuits comprises a second inductor, a third inductor and a second compensation capacitor; the third group of compensation circuits comprises a third compensation capacitor and a fourth inductor; the fourth group of compensation circuits comprises a fifth inductor, a sixth inductor and a fourth compensation capacitor; the fifth group of compensation circuits comprises a fifth compensation capacitor and a seventh inductor; the sixth group of compensation circuits comprises an eighth inductor, a ninth inductor and a sixth compensation capacitor; the first compensation capacitor is connected with the power module and the primary side plate of the first pair of coupling plates in series, one end of the first inductor is connected with the first compensation capacitor and the primary side plate of the first pair of coupling plates, and the other end of the first inductor is connected with the fourth inductor and the seventh inductor and is grounded; the second inductor is connected with the secondary side pole plate of the first pair of coupling pole plates and the second compensation capacitor in series, one end of the third inductor is connected with the second inductor and the second compensation capacitor, and the other end of the third inductor is connected with the sixth inductor and the ninth inductor and is grounded; the third compensation capacitor is connected with the power supply module and the primary side polar plate of the second pair of coupling polar plates in series, one end of the fourth inductor is connected with the third compensation capacitor and the primary side polar plate of the second pair of coupling polar plates, and the other end of the fourth inductor is connected with the first inductor and the seventh inductor and is grounded; a fifth inductor is connected in series with a secondary side pole plate of the second pair of coupling pole plates and a fourth compensation capacitor, one end of a sixth inductor is connected with the fifth inductor and the fourth compensation capacitor, and the other end of the sixth inductor is connected with the third inductor and the ninth inductor and is grounded; the fifth compensation capacitor is connected with the power module and the primary side plate of the third pair of coupling plates in series, one end of a seventh inductor is connected with the fifth compensation capacitor and the primary side plate of the third pair of coupling plates, and the other end of the seventh inductor is connected with the first inductor and the fourth inductor and is grounded; and the eighth inductor is connected with the secondary side pole plate of the third pair of coupling pole plates and the sixth compensation capacitor in series, one end of the ninth inductor is connected with the eighth inductor and the sixth compensation capacitor, and the other end of the ninth inductor is connected with the third inductor and the sixth inductor and is grounded.
In the three-phase excitation type capacitive wireless power transmission system, the power module includes a dc power supply and a three-phase three-bridge inverter or a three-phase ac power supply.
In the three-phase excitation type capacitive wireless power transmission system, the load module includes a three-phase bridge rectifier circuit and a load.
The utility model has the advantages that: the three-phase non-contact power coupling mechanism is adopted, so that the number of the energy transmission channels is three, the energy transmission power and the efficiency are improved, the three-phase energy transmission channels are arranged in a triangular shape, the generated electric fields are subjected to vector superposition at the center, meanwhile, the phase difference of the three-phase power supply causes the phase difference of the generated electric fields, the vector superposition has a counteracting effect, and the influence of the electric fields on equipment and a human body in the environment is reduced. The circuit structure design of the three-phase four-wire leads the potentials of the nodes connected with the three inductors of the compensation circuit positioned on the primary side of the coupling mechanism and the nodes connected with the three inductors of the compensation circuit positioned on the secondary side of the coupling mechanism to be zero, even if the dislocation of the coupling polar plate occurs, the output voltage of the circuit can still be consistent with that when the dislocation does not occur, and the influence of the resonance and the output characteristic of the circuit caused by the dislocation of the polar plate is reduced.
Drawings
Fig. 1 is a circuit diagram of a three-phase excited capacitive wireless power transmission system according to an embodiment of the present invention;
fig. 2 is an equivalent circuit diagram of a three-phase excited capacitive wireless power transmission system according to an embodiment of the present invention;
fig. 3 is an equivalent circuit diagram of a power module according to an embodiment of the present invention;
fig. 4 is a waveform diagram of an output current when the current-mode three-phase bridge inverter circuit according to an embodiment of the present invention is loaded with resistors;
fig. 5 is a schematic view of electric field superposition of a three-phase non-contact power coupling mechanism according to the present invention;
fig. 6 is a schematic structural diagram of a three-phase contactless power coupling mechanism according to an embodiment of the present invention;
fig. 7 is an equivalent circuit diagram of a three-phase contactless power coupling mechanism according to an embodiment of the present invention;
fig. 8 is an equivalent circuit diagram of a primary side compensation circuit connected to the primary side of the three-phase contactless power coupling mechanism according to an embodiment of the present invention;
fig. 9 is an equivalent circuit diagram of a secondary side compensation circuit connected to a secondary side of a three-phase contactless power coupling mechanism according to an embodiment of the present invention;
fig. 10 is an equivalent circuit diagram of a load module according to an embodiment of the present invention;
fig. 11 is a simplified single-phase equivalent circuit diagram according to an embodiment of the present invention;
fig. 12 is a circuit diagram of a CLC according to an embodiment of the present invention;
fig. 13 is an equivalent circuit diagram of a simplified single-phase CLC circuit according to an embodiment of the present invention;
FIG. 14 is a vector diagram of phase currents for a misaligned or non-misaligned coupling plate in accordance with an embodiment of the present invention;
the system comprises a power supply module 1, a direct-current power supply 1-1 and a three-phase three-bridge-arm inverter 1-2;
2-a first group of compensation circuits, 2-1-a first compensation capacitor and 2-2-a first inductor, which are connected with one side of the three-phase non-contact electric coupling mechanism in a secondary mode;
3-a three-phase non-contact power coupling mechanism;
4-a second group of compensation circuits which are connected with two sides of the three-phase non-contact coupling mechanism, 4-1-a second inductor, 4-2-a third inductor and 4-3-a second compensation capacitor;
5-load module, 5-1-three-phase rectification circuit and 5-2-load.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
The three-phase excitation type capacitive wireless electric energy transmission system adopts a plurality of power transmission channels, and the equivalent coupling capacitance is increased, so that the power transmission of the system is increased, and the energy transmission efficiency is improved; meanwhile, the three-phase four-wire circuit structure enables the potential of the three-phase connection node of the circuit to be zero all the time, so that the output of the circuit can still be kept unchanged when the parameters of the circuit are changed due to the dislocation of the coupling polar plate, and the influence of the dislocation of the coupling polar plate on the resonance and output characteristics of the system is reduced.
The embodiment is realized by the following technical scheme that the three-phase excitation type capacitive wireless power transmission system comprises a power module, a primary side compensation circuit of a three-phase non-contact power coupling mechanism, the three-phase non-contact power coupling mechanism (hereinafter referred to as a coupling mechanism), a secondary side compensation circuit of the three-phase non-contact power coupling mechanism and a load module.
The three-phase non-contact power coupling mechanism primary side compensation circuit comprises a first group of compensation circuits, a third group of compensation circuits and a fifth group of compensation circuits; the three-phase non-contact power coupling mechanism comprises a second group of compensation circuits, a fourth group of compensation circuits and a sixth group of compensation circuits.
The power module is connected with the first group of compensation circuits, the first group of compensation circuits is connected with the primary side of the coupling mechanism, the secondary side of the coupling mechanism is connected with the second group of compensation circuits, and the second group of compensation circuits is connected with the load module.
The power supply module comprises a three-phase three-bridge arm inverter or a three-phase alternating current power supply or a signal amplification power supply which is supplied by a direct current power supply; the three-phase non-contact power coupling mechanism comprises three pairs of coupling polar plates which are the same and are arranged in parallel; the first group of compensation circuits connected in series with the primary side of the coupling mechanism comprises a capacitor and an inductor, wherein the capacitor is connected in series with the power module and the coupling pole plate of the primary side of the coupling mechanism, one end of the inductor is connected with the capacitor and the coupling pole plate, and the other end of the inductor is connected with the inductors of the same compensation circuits of the other two phases and is grounded; the second group of compensation circuits connected in series with the secondary side of the coupling mechanism comprises two inductors and a capacitor, wherein the first inductor is connected in series with the coupling pole plate and the capacitor on the secondary side of the coupling mechanism; the load module comprises a three-phase rectifying circuit and a load.
Moreover, the three-phase compensation circuit topology and the three-phase non-contact power coupling mechanism are designed symmetrically. The capacitance and inductance parameters of the compensation circuit at the corresponding positions of the three phases are the same; the three pairs of coupling polar plates in the three-phase non-contact electric coupling mechanism are made of the same material and structure, the same distance between the transmitting polar plate and the receiving polar plate and the same distance between the adjacent coupling polar plates, and all groups of polar plates are not coupled with each other.
And energy is transmitted through the three-phase non-contact power coupling mechanism, three energy transmission channels are provided in total, the three-phase energy transmission channels are arranged in a triangular shape, the generated electric field is subjected to vector superposition at the center, meanwhile, the phase difference exists in the three-phase power supply (A, B, C three phases are sequentially different by 120 degrees), the phase difference also exists in the generated electric field, the vector superposition has a counteracting effect, and the influence of the electric field on equipment and a human body in the environment is reduced due to the combined action of the three-phase power supply and the three-phase power supply. Three inductors of the three groups of compensation circuits on the primary side of the coupling mechanism are connected and grounded, three inductors of the three groups of compensation circuits on the secondary side of the coupling mechanism are connected and grounded, and the potentials of two connected nodes are always zero.
In specific implementation, as shown in fig. 1, a three-phase excitation type capacitive wireless power transmission system includes a power module 1, a compensation circuit 2, a three-phase non-contact power coupling mechanism 3, a compensation circuit 4, and a load module 5. Wireless power is transferred from the primary side to the secondary side through a three-phase contactless power coupling mechanism.
Moreover, the power module 1 converts the direct current into three-phase alternating current, and the power module 1 comprises a direct current power supply 1-1 and a three-phase three-leg inverter 1-2 or a three-phase alternating current power supply or a signal amplification power supply. The first group of compensation circuits 2 comprises a first compensation capacitor 2-1 and a first inductor 2-2. The three-phase non-contact power coupling mechanism 3 comprises three pairs of identical first, second and third pairs of coupling polar plates, and the primary side polar plate and the secondary side polar plate are opposite. The second group of compensation circuits 4 comprises a second inductor 4-1, a third inductor 4-2 and a second compensation capacitor 4-3. The load module 5 comprises a three-phase rectification circuit 5-1 and a load 5-2. The third group of compensation circuits connected with the primary sides of the second pair of coupling polar plates comprise a third compensation capacitor and a fourth inductor; and the fourth group of compensation circuits connected with the secondary sides of the second pair of coupling polar plates comprise a fifth inductor, a sixth inductor and a fourth compensation capacitor. The fifth group of compensation circuits which are connected corresponding to the primary side of the third pair of coupling polar plates comprise a fifth compensation capacitor and a seventh inductor; and the sixth group of compensation circuits connected with the secondary sides of the third pair of coupling polar plates comprise an eighth inductor, a ninth inductor and a sixth compensation capacitor.
The specific connection mode is as follows: the first compensation capacitor 2-1 is connected with the power module 1 and the primary side plate of the first pair of coupling plates in series, one end of the first inductor 2-2 is connected with the first compensation capacitor 2-1 and the primary side plate of the first pair of coupling plates, and the other end is connected with the fourth inductor and the seventh inductor and is grounded; a second inductor 4-1 is connected in series with a secondary side pole plate of the first pair of coupling pole plates and a second compensation capacitor 4-3, one end of a third inductor 4-2 is connected with the second inductor 4-1 and the second compensation capacitor 4-3, and the other end is connected with a sixth inductor and a ninth inductor and is grounded; the third compensation capacitor is connected with the power supply module and the primary side polar plate of the second pair of coupling polar plates in series, one end of the fourth inductor is connected with the third compensation capacitor and the primary side polar plate of the second pair of coupling polar plates, and the other end of the fourth inductor is connected with the first inductor and the seventh inductor and is grounded; a fifth inductor is connected in series with a secondary side pole plate of the second pair of coupling pole plates and a fourth compensation capacitor, one end of a sixth inductor is connected with the fifth inductor and the fourth compensation capacitor, and the other end of the sixth inductor is connected with the third inductor and the ninth inductor and is grounded; the fifth compensation capacitor is connected with the power module and the primary side plate of the third pair of coupling plates in series, one end of a seventh inductor is connected with the fifth compensation capacitor and the primary side plate of the third pair of coupling plates, and the other end of the seventh inductor is connected with the first inductor and the fourth inductor and is grounded; and the eighth inductor is connected with the secondary side pole plate of the third pair of coupling pole plates and the sixth compensation capacitor in series, one end of the ninth inductor is connected with the eighth inductor and the sixth compensation capacitor, and the other end of the ninth inductor is connected with the third inductor and the sixth inductor and is grounded.
When in work: the direct current is inverted into three-phase alternating current through a three-phase three-bridge arm inverter 1-2, then is transmitted from the primary side to the secondary side of the coupling mechanism through a first, a third and a fifth-stage compensation circuit 2 and a three-phase non-contact power coupling mechanism 3, and is rectified into direct current through a second, a fourth and a sixth groups of compensation circuits 4 through a three-phase rectification circuit 5-1 to be provided for a load 5-2.
As shown in fig. 2: in practical application, the system characteristic when the coupling plates are dislocated needs to be considered. When the three-phase compensation topological circuit and the three pairs of coupling polar plates are symmetrically designed, the node N1、N2、N3、N4The potentials are all equal to 0. When the primary side and the secondary side polar plates of the three-phase non-contact power coupling mechanism are dislocated, the coupling capacitor CM1，CM2，CM3Will vary, not equal to each other, which will affect the resonance and output characteristics of the system. But because the first inductance L is nowP1A fourth inductor LP2A seventh inductor LP3Connected and grounded, a third inductance LS1A sixth inductor LS2And a ninth inductor LS3(LN1、LN2、LN3) Connected and grounded such that node N1、N2、N3、N4The potential maintains the zero point. Therefore, the three-phase capacitive wireless power transmission system can be simplified into a single-phase circuit.
As shown in fig. 3: the power module 1 is a current type three-phase bridge inverter circuit and comprises a direct current power supply 1-1 and a three-bridge arm inverter circuit 1-2. S1～S6Six bridge arms are respectively arranged, and the basic working mode is as follows: conducting electricity for 120 degrees in one period of each bridge arm and pressing S1-S4-S5-S2-S3-S6And sequentially conducting every 60 degrees. Three bridge arms of the upper bridge arm group and three bridge arms of the lower bridge arm group are respectively conducted by one bridge arm at each moment. In this embodiment, the inverter circuit can convert the input direct current into three-phase alternating current, A, B, C three-phase output currents have equal amplitudes and phase differences of 120 ° in sequence.
As shown in fig. 4: when the current type three-phase bridge type inverter circuit is provided with a resistance type load, the amplitudes of A, B, C three-phase output currents are equal, but the phases are sequentially different by 120 degrees; when the circuit is loaded with a capacitive load or an inductive load, the phase relation among the A, B, C three-phase output currents is not changed. Therefore, the three-phase bridge inverter circuit in this embodiment can convert the input direct current into alternating current with three-phase phases sequentially different by 120 degrees, so that the electric field generated by the circuit also has phase difference.
As shown in fig. 5: because the amplitudes of the three-phase alternating currents input into the three-phase non-contact electric coupling mechanism are equal, the phases are sequentially different by 120 degrees, and because the three-phase non-contact electric coupling mechanism is arranged in a triangular shape, the formed electric field vector superposition has the mutual offset effect according to the electric field superposition principle, and the influence of an electric field on equipment and a human body in the environment is reduced.
As shown in fig. 6: the three-phase non-contact power coupling mechanism is composed of three pairs of coupling polar plates, wherein a primary side polar plate is opposite to a secondary side polar plate, the materials and the structures of the three pairs of coupling polar plates, the distance between a transmitting polar plate and a receiving polar plate and the distance between adjacent coupling polar plates are the same, and all groups of polar plates are not coupled with each other.
As shown in fig. 7: the equivalent circuit diagram of the three-phase non-contact power coupling mechanism is three coupling capacitors, and when the primary side and the secondary side of the coupling mechanism are in positive alignment, the three coupling capacitors are equal; when the coupling polar plates on the primary side and the secondary side of the coupling mechanism are dislocated, the three coupling capacitance values may not be equal.
As shown in fig. 8: from C1And L1The formed compensation circuit is connected with the primary side of the three-phase non-contact power coupling mechanism, wherein the three-phase circuit is positioned at L1The three inductors are connected and grounded, so that the node potential of the three inductors is always zero.
As shown in fig. 9: from C1And L1、L2The formed compensation circuit is connected with the secondary side of the three-phase non-contact power coupling mechanism. Wherein the three-phase circuit is positioned at L2The three inductors are connected and grounded, so that the node potential of the three inductors is always zero.
As shown in fig. 10: the load module comprises a three-phase bridge rectification circuit 5-1 and a load 5-2. The rectifier circuit can rectify the three-phase alternating current circuit into direct current to supply to a load.
As shown in fig. 11: when the three-phase compensation topology circuit and the three coupling polar plates are symmetrically designed, the three-phase circuit can be simplified into a single-phase circuit. Is located in the coupling mechanismCapacitor C in compensation circuit of primary sideP1An inductor L connected in series with the primary side coupling plate of the coupling mechanismP1The inductors are connected with the other two phases at the same position and are grounded; inductance L in compensation circuit at secondary side of coupling mechanismN1Secondary side coupling polar plate and capacitor C of coupling mechanismS1Series connection, capacitor CS1An inductor L connected in series with the load moduleS1And the inductors are connected with the other two phases of the three-phase circuit at the same position.
As shown in fig. 12: for a CLC circuit, its circuit equivalent impedance is:
wherein ZLIs the equivalent load of the CLC circuit.
Assuming the circuit is lossless, the output voltage and output current of the CLC circuit are
Output voltage-input current gain GVISAnd output current-input voltage GIVSThe gain is:
from equation (5), when an input voltage/current source is supplied to the CLC circuit, the circuit output current/voltage is independent of the load.
As shown in fig. 13: taking the single-phase capacitive wireless power transmission system of the A phase as an example, the compensation circuit can be divided into three parts S1，S2，S3. Coupling capacitorDevice CM1Is divided into three parts CM11，CM12And CM13To provide different functions. CM11And CM13For forming CLC circuits, in which CP1，LP1And CS1Respectively on the primary side and the secondary side of the coupling mechanism. Two CLC circuits respectively satisfy Wherein C isM12Designed to be connected with an inductor LN1Resonance, corresponding to CM12And LN1The series portion is short-circuited. Thus, the single-phase circuit can be simplified to two CLC circuits connected in series. From the relationship between input voltage/current and input current/voltage of the CLC circuit of fig. 9, it can be seen that: the input voltage can output a current independent of the load through the first CLC circuit. The output current of the first CLC circuit passes through the second CLC circuit as an input current to output a voltage independent of the load. Therefore, the output voltage of the single-phase capacitive wireless power transmission system is as follows:
whereinAndrespectively represent S according to formula (5)1Module input voltage-output current gain and S3Input current-output voltage gain of the module. The sum of the output voltage and the input voltage of the wireless power transmission circuit with the compatibility of the formula (6)It is related. Thus, given an input voltage, can be passedTo achieve a particular output voltage.
When the coupling polar plate is dislocated, the coupling capacitor CM12Is changed so that CM12And LN1The series part is no longer resonant and the module is no longer visible as a short circuit. According to formula (4), when CMS of the first CLC circuit when changed1The module may convert an input voltage to a constant output current. Since the parameters of the elements of the two CLC circuits are not changed, the current flows through the three-phase capacitive wireless power transmission system CM1，CM2，CM3Is unchanged compared to when no misalignment has occurred. The current is also the input current of the second CLC circuit, so the output voltage of the circuit is not changed, namely the three-phase capacitive wireless power transmission circuit has good robustness to the dislocation of the polar plate.
As shown in fig. 14: the dotted line vector represents the input current I 'of the first CLC circuit when the primary side coupling plate and the secondary side coupling plate of the three-phase non-contact power coupling mechanism are dislocated'P1Of output current I'M1Through an inductor LP1Current of'LP1(ii) a The solid line vector represents I when the coupling plate is not dislocatedP1、ILP1、IM1。
When the coupling polar plate of the three-phase non-contact coupling mechanism is dislocated, CM12The change will occur and the circuit output equivalent impedance is:
wherein ZSIs the equivalent impedance of the second CLC circuit and the load module, and Δ L represents the equivalent reactance introduced by the plate misalignment. The current flowing into the first CLC circuit at this time is:
when the coupling polar plate is dislocated, S is used1The CLC circuitry of the module functions such that the current flowing through the coupling plate does not change. But flows through the capacitor CP1Inductor LP1Will increase resulting in an increase in the voltage across these elements. Therefore, the misalignment between the coupling plates should be limited to a suitable range to ensure that the circuit compensation elements are within safe voltage and current levels.
It should be understood that parts of the specification not set forth in detail are well within the prior art.
Although specific embodiments of the present invention have been described above with reference to the accompanying drawings, it will be appreciated by those skilled in the art that these embodiments are merely illustrative, and that various changes or modifications may be made without departing from the spirit and scope of the invention. The scope of the present invention is limited only by the appended claims.
Claims (3)
1. A three-phase excitation type capacitive wireless electric energy transmission system is characterized by comprising a power supply module, a three-phase non-contact type electric power coupling mechanism primary side compensation circuit, a three-phase non-contact type electric power coupling mechanism secondary side compensation circuit and a load module which are sequentially connected.
2. The system of claim 1, wherein the three-phase wireless power coupling mechanism comprises three pairs of first, second and third pairs of coupling plates disposed in parallel and in the same direction; the primary side polar plate and the secondary side polar plate of the first pair of coupling polar plates, the second pair of coupling polar plates and the third pair of coupling polar plates are opposite, the material, the structure, the distance between the transmitting polar plate and the receiving polar plate and the distance between the adjacent coupling polar plates are the same, and all groups of polar plates are not coupled with each other.
3. The system of claim 2, wherein the primary side compensation circuit of the three-phase contactless power coupling mechanism comprises a first, a third and a fifth set of compensation circuits, and the secondary side compensation circuit of the three-phase contactless power coupling mechanism comprises a second, a fourth and a sixth set of compensation circuits; the first group of compensation circuits comprises a first compensation capacitor and a first inductor; the second group of compensation circuits comprises a second inductor, a third inductor and a second compensation capacitor; the third group of compensation circuits comprises a third compensation capacitor and a fourth inductor; the fourth group of compensation circuits comprises a fifth inductor, a sixth inductor and a fourth compensation capacitor; the fifth group of compensation circuits comprises a fifth compensation capacitor and a seventh inductor; the sixth group of compensation circuits comprises an eighth inductor, a ninth inductor and a sixth compensation capacitor; the first compensation capacitor is connected with the power module and the primary side plate of the first pair of coupling plates in series, one end of the first inductor is connected with the first compensation capacitor and the primary side plate of the first pair of coupling plates, and the other end of the first inductor is connected with the fourth inductor and the seventh inductor and is grounded; the second inductor is connected with the secondary side pole plate of the first pair of coupling pole plates and the second compensation capacitor in series, one end of the third inductor is connected with the second inductor and the second compensation capacitor, and the other end of the third inductor is connected with the sixth inductor and the ninth inductor and is grounded; the third compensation capacitor is connected with the power supply module and the primary side polar plate of the second pair of coupling polar plates in series, one end of the fourth inductor is connected with the third compensation capacitor and the primary side polar plate of the second pair of coupling polar plates, and the other end of the fourth inductor is connected with the first inductor and the seventh inductor and is grounded; a fifth inductor is connected in series with a secondary side pole plate of the second pair of coupling pole plates and a fourth compensation capacitor, one end of a sixth inductor is connected with the fifth inductor and the fourth compensation capacitor, and the other end of the sixth inductor is connected with the third inductor and the ninth inductor and is grounded; the fifth compensation capacitor is connected with the power module and the primary side plate of the third pair of coupling plates in series, one end of a seventh inductor is connected with the fifth compensation capacitor and the primary side plate of the third pair of coupling plates, and the other end of the seventh inductor is connected with the first inductor and the fourth inductor and is grounded; and the eighth inductor is connected with the secondary side pole plate of the third pair of coupling pole plates and the sixth compensation capacitor in series, one end of the ninth inductor is connected with the eighth inductor and the sixth compensation capacitor, and the other end of the ninth inductor is connected with the third inductor and the sixth inductor and is grounded.
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| CN110011429A (en) * | 2019-04-25 | 2019-07-12 | 武汉大学 | A kind of Three-phase high-power capacitive radio energy transmission system |
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| CN110011429A (en) * | 2019-04-25 | 2019-07-12 | 武汉大学 | A kind of Three-phase high-power capacitive radio energy transmission system |
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