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Induction type WPT bilateral LCLC topology for shielding peripheral magnetic field and parameter design method thereof

An inductive and topological technology, applied in magnetic/electric field shielding, electrical components, circuit devices, etc., can solve problems such as restrictions and human health effects, and achieve the effect of weakening magnetic field leakage and good shielding effect

Active Publication Date: 2022-01-04
SOUTHWEST JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003]However, the application of the existing inductive wireless power transfer technology is greatly limited. One of the main reasons is that the magnetic field generated by this technology will be scattered around, which is harmful to the human body. health impact

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  • Induction type WPT bilateral LCLC topology for shielding peripheral magnetic field and parameter design method thereof
  • Induction type WPT bilateral LCLC topology for shielding peripheral magnetic field and parameter design method thereof
  • Induction type WPT bilateral LCLC topology for shielding peripheral magnetic field and parameter design method thereof

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Embodiment Construction

[0043] The embodiment of the present invention will be explained in detail below in conjunction with the accompanying drawings. The examples given are only for the purpose of illustration, and cannot be interpreted as limiting the present invention. The accompanying drawings are only for reference and description, and do not constitute the scope of patent protection of the present invention. limitations, since many changes may be made in the invention without departing from the spirit and scope of the invention.

[0044] In order to shield the peripheral magnetic field in the process of inductive wireless power transmission, an embodiment of the present invention provides an inductive WPT bilateral LCLC topology that shields the peripheral magnetic field, such as figure 1 As shown, it includes the full-bridge inverter I1 connected to the transmitting end and the transmitting coil L 3 between the primary side LCLC topology, and the receiving coil L connected at the receiving en...

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Abstract

The invention relates to the technical field of wireless power supply, and particularly discloses an induction type WPT bilateral LCLC topology for shielding a peripheral magnetic field and a parameter design method thereof. Based on the proposed bilateral LCLC topology structure, a primary side shielding coil and a secondary side shielding coil which are mutually decoupled with a transmitting coil and a receiving coil are constructed; when the current is in the same direction, the corresponding shielding coil is reversely wound, and when the current is in the reverse direction, the corresponding shielding coil is forwardly wound, so that the current directions of the primary and secondary shielding coils are respectively opposite to the current flowing through the transmitting coil and the receiving coil, and then the purpose of weakening magnetic field leakage between the transmitting and receiving coils is achieved; and the shielding magnetic field generated between the shielding coils can shield the magnetic field on the periphery of the receiving and transmitting coil on the premise that the energy transfer characteristic of the main magnetic field is not affected, and due to the topological characteristic of the LCLC, the ratio of the current in the shielding coils to the current in the receiving and transmitting coil can be changed through parameter design, so that the optimal shielding effect is achieved.

Description

technical field [0001] The invention relates to the technical field of wireless power supply, in particular to an inductive WPT bilateral LCLC topology shielding the peripheral magnetic field and a parameter design method thereof. Background technique [0002] The wireless power transfer (WPT) system uses energy carriers in space (such as magnetic fields, electric fields, electromagnetic waves, etc.) to transmit electric energy from the power supply side to the load side. Among them, the inductive wireless power transmission uses the alternating magnetic field induced in the sending coil to generate a voltage in the receiving coil through electromagnetic induction to realize wireless transmission of energy. This technology can effectively avoid problems such as leakage and electric sparks caused by traditional wired power transmission. At present, it is widely used in charging fields such as electric vehicles, medical equipment, and mobile phones. [0003] However, the app...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/70H05K9/00H02J50/10H02J50/12
CPCH02J50/70H05K9/00H02J50/10H02J50/12Y02B70/10
Inventor 李砚玲应杨江谢开汶
Owner SOUTHWEST JIAOTONG UNIV
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