Wireless power transmission system with double coils wound in parallel, and output power distribution method of system

A technology of wireless power transmission and output power, which is applied in the direction of electromagnetic wave systems, electrical components, circuit devices, etc., can solve the problems that the output current cannot meet the needs of high-power power transmission, the promotion limit of a single inverter, and affect the stability of the system. The power adjustment method is simple, the effect of reducing capacity and increasing redundancy

CN104682579AActive Publication Date: 2015-06-03SOUTHWEST JIAOTONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2015-06-03

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Abstract

The invention provides a wireless power transmission system with double coils wound in parallel, and an output power distribution method of the system. The system comprises a transmitting end and a receiving end, wherein the transmitting end is formed in a manner that a direct-current power supply is connected with an inverter I and an inverter II in parallel; the inverter I is connected with a transmitting coil I through a compensation capacitor I and a power distribution capacitor I, and the inverter II is connected with a transmitting coil II through a compensation capacitor II and a power distribution capacitor II; the transmitting coil I and the transmitting coil II are identical and wound on the same magnetic core in parallel; the receiving end is formed in a manner that a receiving coil is sequentially connected with a compensation capacitor of the receiving end, a rectifier and a load in series. The power distribution method comprises the following steps: calculating and arranging the power distribution capacitors; regulating and controlling total output power through a controller, and distributing the output power by the two inverters according to a ratio. The system is low in cost, high in stability and high in transmission power. Besides, the two inverters are electrically isolated, so that the redundancy, flexibility and reliability of the system are improved. The system only needs one direct-current power supply, the power distribution method is simple and convenient, and the control mode is simple.
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Description

technical field

[0001] The invention relates to the technical field of wireless power transmission, in particular to a wireless power transmission system with double coils wound in parallel and an output power distribution method thereof. Background technique

[0002] The application of wireless power transmission technology to the power supply system of rail transit can avoid the potential safety hazards caused by the contact and sliding power supply of exposed conductors such as the existing catenary or the third rail, and there are no disadvantages such as carbon deposition and friction loss, and it has low maintenance costs. It has the advantages of safety, reliability and high practicability.

[0003] The main composition and working process of the existing wireless power transmission system are: the power frequency alternating current is rectified into direct current, and the direct current is inverted into high frequency alternating current after passing through the i...

Examples

Embodiment

[0044] figure 1 , figure 2 and Figure 4 It shows that a specific embodiment of the present invention is a wireless power transmission system with double coils wound in parallel, including a sending end and a receiving end, wherein:

[0045] A wireless power transmission system with double coils wound side by side, including a sending end and a receiving end, its structure is:

[0046] The specific composition of the sending end is: the two ends of the DC power supply E are connected in parallel with the inverter one H1 and the inverter two H2; the inverter one H1 is connected with the sending coil one Ls1 through the compensation capacitor Cs1 and the power distribution capacitor Ce1 in turn, Inverter 2 H2 is sequentially connected to sending coil 2 Ls2 through compensation capacitor 2 Cs2 and power distribution capacitor 2 Ce2; sending coil 1 Ls1 and sending coil 2 Ls2 are identical and wound on the same magnetic core;

[0047] The receiving end is sequentially connected...