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CN-122026634-A - Decoupling coil-based two-way wireless power transmission system and parameter design method

CN122026634ACN 122026634 ACN122026634 ACN 122026634ACN-122026634-A

Abstract

The application relates to the technical field of power electronics, and discloses a decoupling coil-based two-way wireless power transmission system and a parameter design method. The parameter design method comprises the steps of designing constant voltage compensation capacitance parameters, designing constant current compensation inductance parameters and constant current compensation capacitance parameters, and designing emission compensation inductance parameters and emission compensation capacitance parameters. The application solves the technical pain points of inconsistent output characteristics and great regulation difficulty of the traditional two-way wireless charging, not only improves the charging efficiency and the electric energy quality, but also expands the applicability in a multi-device simultaneous charging scene, and has remarkable engineering application value.

Inventors

  • CHEN YANDONG
  • ZHOU YUHANG
  • XIE JIAWEI
  • XIE ZHIWEI
  • LUO CONG

Assignees

  • 湖南大学

Dates

Publication Date
20260512
Application Date
20260413

Claims (10)

  1. 1. The decoupling coil-based two-way wireless power transmission system is characterized by comprising a transmitting end coil and a double receiving end coil which is parallel to and completely opposite to the transmitting end coil, wherein the transmitting end coil is formed by connecting a first square coil and first solenoid coils tightly wound on two sides of the first square coil in series, the double receiving end coil is formed by connecting a second square coil and second solenoid coils tightly wound on two sides of the second square coil in series, the second square coil forms a first receiving channel, the second solenoid coils form a second receiving channel, and the first receiving channel and the second receiving channel are mutually decoupled.
  2. 2. The decoupling coil based two-way wireless power transfer system of claim 1, wherein the first receive channel is provided with an LCC-S compensation topology to construct a constant voltage output channel.
  3. 3. The decoupling coil based two-way wireless power transfer system of claim 1, wherein the second receive channel is provided with an LCC-LCC compensation topology to construct a constant current output channel.
  4. 4. The decoupling coil based two-way wireless power transfer system of claim 1, wherein said transmit end coil comprises in particular a first MOSFET tube Second MOSFET Third MOSFET tube Fourth MOSFET Emission compensation inductance Emission compensation inductance Parasitic resistance of (2) First emission compensation capacitor Second emission compensation capacitor Parasitic resistance of transmitting end coil And self-inductance of the transmitting end coil And a first MOSFET Drain electrode of (d) and third MOSFET The drain electrodes of the capacitor are all connected with the preset direct current voltage input by the power supply Is connected with the anode of the second MOSFET Source and fourth MOSFET tube The source electrodes of the power supply are connected with the direct current voltage input by the power supply Is connected with the cathode of the first MOSFET Source and second MOSFET tube Drain electrode of (C) and emission compensation inductance Is connected with one end of the first emission compensation capacitor And a second emission compensation capacitance One end of (a) is connected with the emission compensation inductance A second emission compensation capacitor connected to the other end of the first electrode Self-inductance of the other end of (a) and the transmitting end coil Is connected with one end of the transmitting end coil Parasitic resistance of the other end of (a) and the transmitting end coil Is connected to one end of the transmitting end coil And a first emission compensation capacitance And the other end of the capacitor is connected with the emission compensation inductor Parasitic resistance of (2) Is connected to one end of a third MOSFET Source and fourth MOSFET tube Drain electrode of (C) and emission compensation inductance Parasitic resistance of (2) Is connected with the other end of the connecting rod; the first receiving channel specifically comprises a coil self-inductance of the first receiving channel Constant voltage compensation capacitor Parasitic resistance of coil of first receiving channel First diode Second diode Third diode Fourth diode Filter capacitor of first receiving channel And a load resistor of the first receiving channel And the coil of the first receiving channel is self-induced One end of (2) and constant voltage compensation capacitor Is connected to one end of a first diode Positive electrode and second diode of (a) Negative electrode of (C) and constant voltage compensation capacitor Is connected with the other end of the first receiving channel Coil parasitic resistance of the other end of (a) and the first receiving channel Is connected to one end of a third diode Positive electrode and fourth diode of (a) The negative electrode of the first receiving channel is connected with the parasitic resistance of the coil of the first receiving channel Is connected to the other end of the first diode Cathode, third diode Filter capacitor of the first receiving channel and the negative electrode of the second receiving channel Is connected with the load resistor of the first receiving channel Is connected to one end of a second diode Positive electrode of (a) fourth diode Filter capacitor of the positive electrode of (a) and the first receiving channel The other end of the first receiving channel is connected with the load resistor of the first receiving channel Is connected with the other end of the connecting rod; the second receiving channel specifically comprises a coil self-inductance of the second receiving channel First constant current compensation capacitor Coil parasitic resistance of second receiving channel Constant current compensation inductance Constant current compensation inductance Parasitic resistance of (2) Second constant current compensation capacitor Fifth diode Sixth diode Seventh diode Eighth diode Filter capacitor of second receiving channel And a load resistor of the second receiving channel And coil self-inductance of the second receiving channel One end of (a) is connected with the first constant current compensation capacitor Is connected with one end of the first constant current compensation capacitor And a second constant current compensation capacitor One end of the inductor is connected with a constant current compensation inductor A fifth diode connected to one end of Positive electrode of (d) and sixth diode Is connected with constant current compensation inductance through negative electrode Is connected to the other end of the second receiving channel Coil parasitic resistance of the other end of (a) and the second receiving channel One end of the second constant current compensation capacitor is connected with Is connected to the other end of the capacitor and constant current compensation inductor Parasitic resistance of (2) Is connected with the parasitic resistance of the coil of the second receiving channel Is connected to the other end of the seventh diode Positive electrode of (c) and eighth diode Is connected with constant current compensation inductance through negative electrode Parasitic resistance of (2) A fifth diode connected to the other end of Anode, seventh diode Filter capacitor of the second receiving channel and the negative electrode of the second receiving channel And the load resistor of the second receiving channel Is connected to one end of a sixth diode Anode, eighth diode Filter capacitor of the positive electrode of (a) and the second receiving channel The other end of the second receiving channel is connected with the load resistor of the second receiving channel Is connected with the other end of the connecting rod; Coil self-inductance of first receiving channel Self-inductance with transmitting end coil Form mutual inductance therebetween Coil self-inductance of the second receiving channel Self-inductance with transmitting end coil Form mutual inductance therebetween Coil self-inductance of the first receiving channel Coil self-inductance with second receiving channel Form mutual inductance therebetween And (2) and 。
  5. 5. The decoupling coil based two-way wireless power transfer system of claim 1, wherein ferrite is disposed between said first square coil and said first solenoid coil, and ferrite is disposed between said second square coil and said second solenoid coil.
  6. 6. A method for designing parameters of a two-way wireless power transmission system based on a decoupling coil, applied to the two-way wireless power transmission system based on a decoupling coil as claimed in any one of claims 1 to 5, comprising: Designing constant-voltage compensation capacitance parameters to enable the first receiving channel to work in a constant-voltage mode for constant-voltage output; designing constant current compensation inductance parameters and constant current compensation capacitance parameters to enable the second receiving channel to work in a constant current mode to perform constant current output; and designing a transmission compensation inductance parameter and a transmission compensation capacitance parameter of a transmitting end coil shared by the first receiving channel and the second receiving channel.
  7. 7. The method for designing parameters of a two-way wireless power transmission system based on a decoupling coil according to claim 6, wherein the mathematical expression of the constant voltage compensation capacitance parameter is: Wherein, the The capacitance parameter is compensated for a constant voltage, For the operating frequency of a two-way wireless power transfer system based on a decoupling coil, Is the coil self-inductance of the first receiving channel.
  8. 8. The method for designing parameters of a two-way wireless power transmission system based on a decoupling coil as set forth in claim 6, wherein said constant current compensation inductance parameter is determined based on a coil inductance value of a second receiving channel, said constant current compensation capacitance parameter comprises And The corresponding mathematical expression is: Wherein, the For the operating frequency of a two-way wireless power transfer system based on a decoupling coil, The inductance parameter is compensated for the constant current, Is the coil self-inductance of the second receiving channel.
  9. 9. The method for designing parameters of a two-way wireless power transmission system based on a decoupling coil as set forth in claim 6, wherein said transmission compensation inductance parameter is determined based on self inductance of a transmitting end coil, said transmission compensation capacitance parameter comprises And The corresponding mathematical expression is: Wherein, the For the operating frequency of a two-way wireless power transfer system based on a decoupling coil, The inductance parameter is compensated for the emission, Is the self-inductance of the transmitting end coil.
  10. 10. The method for designing parameters of a two-way wireless power transmission system based on a decoupling coil according to any one of claims 7 to 9, wherein the operating frequency of the two-way wireless power transmission system based on a decoupling coil The mathematical expression of (2) is: Wherein, the The inductance parameter is compensated for the transmission, And The capacitance parameter is compensated for the transmission, Is the coil self-inductance of the first receiving channel, The capacitance parameter is compensated for a constant voltage, The inductance parameter is compensated for a constant current, And The capacitance parameter is compensated for a constant current, For the self-inductance of the transmitting-end coil, Is the coil self-inductance of the second receiving channel.

Description

Decoupling coil-based two-way wireless power transmission system and parameter design method Technical Field The application relates to the technical field of power electronics, in particular to a decoupling coil-based two-way wireless power transmission system and a parameter design method. Background Wireless power transmission has rapidly evolved from theoretical concepts to one of the key technologies of modern society by virtue of the safety, convenience and environmental adaptability brought by non-contact power supply. The application field of the medical implant device is continuously expanded, and the medical implant device is widely permeated into high-end industrial fields such as medical implant equipment, electric automobiles and unmanned aerial vehicles. In these diverse scenarios, consumers place precise and demanding demands on the power characteristics. Some industries, such as unmanned aerial vehicle groups, also require both constant voltage and constant current input modes. To meet the increasing power demands and the demand for multiple devices to be powered simultaneously, the architecture of wireless power transfer evolves from simple single transmit single receive to a more scalable and flexible multiple transmit multiple receive topology. The dual receiving ends become hot spots of current researches due to the remarkable advantages of the dual receiving ends in terms of improving space utilization rate and power supply freedom. However, the performance improvement of the dual receiver is greatly limited by its inherent physical defect, i.e., the unavoidable cross-coupling effect between the two receiver coils. The cross-coupling effect not only causes detuning but also affects the independence of the outputs, making the control complex and unstable. Thus, how to eliminate the inherent cross coupling effect of the dual reception end is a technical problem to be solved in the art. Disclosure of Invention The application aims to provide a two-way wireless power transmission system based on a decoupling coil and a parameter design method, which are used for solving the technical problem that the inherent cross coupling effect of a double receiving end is difficult to eliminate in the prior art. The application provides a decoupling coil-based two-way wireless power transmission system, which comprises a transmitting end coil and a double-receiving end coil which is parallel to and completely opposite to the transmitting end coil, wherein the transmitting end coil is formed by connecting a first square coil and first solenoid coils tightly wound on two sides of the first square coil in series, the double-receiving end coil is formed by connecting a second square coil and second solenoid coils tightly wound on two sides of the second square coil in series, the second square coil forms a first receiving channel, the second solenoid coils form a second receiving channel, and the first receiving channel and the second receiving channel are mutually decoupled. Preferably, the first receiving channel is provided with an LCC-S compensation topology to construct a constant voltage output channel. Preferably, the second receiving channel is provided with an LCC-LCC compensation topology to construct a constant current output channel. Preferably, the transmitting end coil specifically comprises a first MOSFETSecond MOSFETThird MOSFET tubeFourth MOSFETEmission compensation inductanceEmission compensation inductanceParasitic resistance of (2)First emission compensation capacitorSecond emission compensation capacitorParasitic resistance of transmitting end coilAnd self-inductance of the transmitting end coilAnd a first MOSFETDrain electrode of (d) and third MOSFETThe drain electrodes of the capacitor are all connected with the preset direct current voltage input by the power supplyIs connected with the anode of the second MOSFETSource and fourth MOSFET tubeThe source electrodes of the power supply are connected with the direct current voltage input by the power supplyIs connected with the cathode of the first MOSFETSource and second MOSFET tubeDrain electrode of (C) and emission compensation inductanceIs connected with one end of the first emission compensation capacitorAnd a second emission compensation capacitanceOne end of (a) is connected with the emission compensation inductanceA second emission compensation capacitor connected to the other end of the first electrodeSelf-inductance of the other end of (a) and the transmitting end coilIs connected with one end of the transmitting end coilParasitic resistance of the other end of (a) and the transmitting end coilIs connected to one end of the transmitting end coilAnd a first emission compensation capacitanceAnd the other end of the capacitor is connected with the emission compensation inductorParasitic resistance of (2)Is connected to one end of a third MOSFETSource and fourth MOSFET tubeDrain electrode of (C) and emission compensation inductanceP