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Electric vehicle bidirectional wireless power transmission topological structure and modulation method

A two-way radio and topology technology, applied in electric vehicle charging technology, electric vehicle, vehicle energy storage, etc., can solve the problems of inability to realize batteries, affecting power quality, and huge harmonic content of the power grid, so as to improve the quality of the power grid and improve the Working efficiency, the effect of eliminating the output inductor current ripple

Active Publication Date: 2021-02-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problem that the existing wireless charging structure for high-power electric vehicles introduces huge harmonic content to the power grid, affects the quality of power energy, and cannot realize the power feeding of the battery to the power grid.

Method used

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  • Electric vehicle bidirectional wireless power transmission topological structure and modulation method
  • Electric vehicle bidirectional wireless power transmission topological structure and modulation method
  • Electric vehicle bidirectional wireless power transmission topological structure and modulation method

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specific Embodiment approach 1

[0045] Specific implementation mode one: refer to figure 1 Describe this embodiment in detail, the topology structure of two-way wireless power transmission for electric vehicles described in this embodiment, the topology structure includes a transmitter converter and a receiver converter,

[0046] The transmitter converter includes a unit power correction module 1, a quasi-Z source converter 2, a high-frequency inverter module 3, a transmitter LCC type compensation network 4 and a transmitter coil,

[0047] The receiver converter includes a receiver coil, a receiver compensation network 5 and a bidirectional controllable rectifier bridge 6,

[0048] The unit power correction module 1 is used to correct the power factor of the alternating current output from the grid, and transmit the corrected direct current to the quasi-Z source converter 2, and is also used to perform power factor correction on the boosted direct current to obtain the corrected AC transmission to the grid;...

specific Embodiment approach 2

[0055] Specific embodiment 2: This embodiment is to further explain the topological structure of electric vehicle two-way wireless power transmission described in specific embodiment 1. In this embodiment, the unit power correction module 1 is composed of 6 switching tubes and 6 diodes three-phase full-bridge inverter circuit.

[0056] In this embodiment, the circuit structure of the unit power correction module 1 is as follows figure 1 shown.

specific Embodiment approach 3

[0057] Specific embodiment three: This embodiment is a further description of the two-way wireless power transmission topology of electric vehicles described in specific embodiment two. In this embodiment, the quasi-Z source converter 2 includes capacitors C1-C2, coupling inductors L1- L2 and switch tube S7,

[0058] The positive output terminal of the unit power correction module 1 is simultaneously connected to the positive terminal of the capacitor C1 and one end of the coupling inductor L1, and the other end of the coupling inductor L1 is simultaneously connected to one end of the capacitor C2 and one end of the switch tube S7, and the other end of the switch tube S7 is simultaneously connected to the coupling One end of the inductor L2 is connected to the negative pole of the capacitor C1, and the other end of the inductor L2 is connected to the positive input terminal of the high frequency inverter module 3,

[0059] The other end of the capacitor C2 is simultaneously co...

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Abstract

The invention discloses an electric vehicle bidirectional wireless power transmission topological structure and a modulation method, and relates to the field of power transmission. The invention aimsto solve the problems that an existing structure for wirelessly charging a high-power electric vehicle introduces huge harmonic content to a power grid, the electric energy quality is influenced, andthe feed of a battery to the power grid cannot be realized. A three-phase full-bridge inverter circuit is used for carrying out power factor correction on grid-side output, and it is ensured that grid-side current and voltage phases are the same. Step-down regulation is performed on the bus voltage by using a quasi-Z-source converter based on a coupling inductor, and high-frequency inversion is performed through a high-frequency inversion module H bridge after regulation so as to obtain high-frequency alternating currents. High-frequency alternating currents are transmitted to a receiving coiland a receiving end compensation network resonance network through a resonance network and a transmitting coil. Finally, energy is transmitted to a battery through a bidirectional controllable rectifier bridge. The structure is used to charge a battery.

Description

technical field [0001] The invention relates to a bidirectional electric energy transmission structure and a modulation method. It belongs to the field of electric energy transmission. Background technique [0002] At present, most of the functions of the converter at the transmitting end of the electric vehicle wireless energy charging technology are realized: the single-phase / three-phase power grid outputs DC voltage through uncontrolled rectification, and after being adjusted by the DC / DC converter, the voltage is subjected to high-frequency inverter and high-frequency AC. transmitted to the resonant network. The problems brought about by such a structure are: 1) For wireless charging of high-power electric vehicles without PFC correction, it will introduce huge harmonic content to the power grid, which will affect the power quality; The direction in which the car's wireless energy flows does not allow the battery to feed power to the grid. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): B60L53/12B60L55/00
CPCB60L53/12B60L55/00Y02T90/16
Inventor 那拓扑张明涛徐国强唐佳棋李为汉张千帆
Owner HARBIN INST OF TECH
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