A multi-launch-multi-pick-multi-load IPT system cross-coupling coefficient elimination method, circuit and system

A cross-coupling and multi-emission technology, applied in the direction of circuit devices, electrical components, etc., can solve the problems of inability to guide the actual system design and inconvenience

Active Publication Date: 2022-02-11
CHINA ELECTRIC POWER RES INST +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently a lack of a simple and universal cross-coupling coefficient elimination method suitable for engineering to improve the system output performance, so it cannot guide the design of the actual system, and it also brings some inconvenience to the actual application design.

Method used

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  • A multi-launch-multi-pick-multi-load IPT system cross-coupling coefficient elimination method, circuit and system
  • A multi-launch-multi-pick-multi-load IPT system cross-coupling coefficient elimination method, circuit and system
  • A multi-launch-multi-pick-multi-load IPT system cross-coupling coefficient elimination method, circuit and system

Examples

Experimental program
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Effect test

Embodiment 1

[0058] A method for eliminating cross-coupling coefficients in a multi-launch-multi-pick-up-multi-load IPT system, see Figure 1 to Figure 3 , including the following steps:

[0059] Step 1: According to the application background, determine the connection mode between multiple transmitting coils on the primary side, and determine the resonant compensation circuits on the primary side and the secondary side at the same time;

[0060] Step 2: When the cross-coupling coefficient is not considered, determine all circuit parameters that meet the system output performance index;

[0061] The system output performance index includes output power and system efficiency;

[0062] The circuit parameters include the inductance and internal resistance of each primary coil and secondary coil, the mutual inductance when each primary coil and secondary coil are coupled, the size of each load, and the size of all compensation capacitors and compensation inductance on the primary and secondar...

Embodiment 2

[0071] A method for eliminating cross-coupling coefficients in a multi-launch-multi-pick-up-multi-load IPT system, see Figure 1 to Figure 3 , including the following steps:

[0072] The first step: according to the application background, determine the series or parallel connection form of multiple transmitting coils on the primary side, and determine the structure of the resonance compensation circuit on the primary side and the secondary side at the same time;

[0073] The N transmitting coils on the primary side can be combined in various ways, and the common two ways are that the N transmitting coils are connected in series and the N transmitting coils are connected in parallel. When N transmitting coils are connected in parallel, usually N sets of primary-side resonant compensation circuits are required, thus increasing the cost. Therefore, the present invention selects a mode in which N primary-side coils are connected in series for analysis. The primary and secondary ...

Embodiment 3

[0107] Taking the three-transmission-three-reception-three-load IPT system as an example, follow the process figure 1 The effectiveness of the cross-coupling coefficient elimination method of the multi-transmission-multi-pickup-multi-load IPT system of the present invention is analyzed.

[0108] Step 1: According to the application background, determine the series or parallel connection form of multiple transmitting coils on the primary side, and determine the structure of the compensation circuit on the primary side and the secondary side at the same time;

[0109] For the three-transmission-three-pickup three-load IPT system, the three transmission coils on the primary side can be combined in a variety of ways, and the common two are three transmission coils connected in series and three transmission coils connected in parallel. When three transmitting coils are connected in parallel, three sets of primary side resonance compensation circuits are usually required, thus incre...

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Abstract

The invention discloses a method for eliminating the cross-coupling coefficient of a multi-transmission-multi-pick-up-multi-load IPT system. The method includes determining the resonance compensation circuits on the primary side and the secondary side; determining all circuit parameters satisfying the system output performance index; Current equation; determine each cross-coupling coefficient existing in the circuit, and solve the current equation of each branch; make the difference of each branch current equation without considering the cross-coupling coefficient and considering the condition of the cross-coupling coefficient, and obtain the difference equation of each branch current ; Add the compensation impedance where there is a cross-coupling coefficient in the difference equation; bring the solved current equation of each branch into the difference equation containing the impedance to be compensated, and solve it in reverse to obtain the impedance value to be compensated for each branch; The circuit angle eliminates the cross-coupling coefficient between multiple coils, and is universal to any multi-transmission-picked-multi-load IPT system, which is beneficial to the guidance of the elimination of the cross-coupling coefficient of the actual system and improves the system output performance.

Description

technical field [0001] The invention belongs to the technical field of wireless energy transmission, and in particular relates to a multi-transmit-multi-pick-up-multi-load IPT system cross-coupling coefficient elimination method, circuit and system. Background technique [0002] Wireless Power Transfer (WPT for short) was first born in the United States in the 19th century. It is a new power access mode that realizes the transmission of electric energy from the source device to the power receiving device by means of space invisible soft media (such as magnetic field, electric field, laser, microwave, etc.). This technology achieves electrical isolation between power supply and power receiving equipment, so it fundamentally eliminates the problems of device wear, poor contact, and contact sparks caused by the traditional wired power supply mode. It is a clean, safe and flexible new power supply mode. It was selected as one of the top ten scientific research directions in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J50/12H02J50/40
CPCH02J50/12H02J50/40
Inventor 何浩吴晓康徐翀王松岑魏斌
Owner CHINA ELECTRIC POWER RES INST
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