Dynamic wireless power supply system power fluctuation suppression method based on voltage doubling rectifier

A technology of power fluctuation suppression and voltage doubler rectifier, which is applied in the direction of electrical components, circuit devices, etc., and can solve problems affecting the safety and reliable operation of electrical equipment at the receiving end, system output voltage changes, fluctuations, etc.

Active Publication Date: 2020-09-11
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

In a dynamic wireless power supply system, the mutual inductance between the transmitting and receiving coils will fluctuate due to the movement of the receiving end, which will lead to changes in the output voltage of the system, which will greatly affect the safe and reliable operation of the electrical equipment at the receiving end

Method used

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  • Dynamic wireless power supply system power fluctuation suppression method based on voltage doubling rectifier
  • Dynamic wireless power supply system power fluctuation suppression method based on voltage doubling rectifier
  • Dynamic wireless power supply system power fluctuation suppression method based on voltage doubling rectifier

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Embodiment Construction

[0063] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0064] The resonant network adopts LCC-double decoupling topology, and its equivalent circuit diagram is as follows figure 1 shown. Considering the high power quality of the compensation network, the currents in the transmitting and receiving coils are considered sinusoidal, and the parasitic resistances of wires and components are ignored in the analysis. According to Kirchhoff's voltage-current law, the system can be described as:

[0065]

[0066] where ω is the angular frequency of the system.

[0067] Due to the resonance of the system, there are:

[0068] j r +1 / jωC r = 0, jωL p +1 / ...

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Abstract

The invention discloses a dynamic wireless power supply system power fluctuation suppression method based on a voltage doubling rectifier, and belongs to the technical field of dynamic wireless charging. The problem of output voltage and power fluctuation caused by mutual inductance fluctuation of the transmitting coil and the receiving coil in the moving process of the receiving end of the dynamic wireless power supply system is solved. The output voltage of the system is kept at a constant value, a non-power area of the dynamic wireless power supply system is avoided, and the power supply stability and reliability of the system are ensured. The method comprises the following steps: a, constructing a wireless power supply system topological structure based on primary side LCC parallel connection and secondary side dual-decoupling; and b, adjusting the working mode of the wireless power supply system based on primary side LCC parallel connection and secondary side dual-decoupling according to the relative offset state of the topological structure coil, and ensuring that the output voltage U0 is stable. According to the method, the constant output voltage of the dynamic wireless power supply system can be effectively maintained in the moving process of the receiving end, a complex closed-loop control means is not needed, and the method has good applicability and operability.

Description

technical field [0001] The invention belongs to the technical field of dynamic wireless charging, and in particular relates to a power fluctuation suppression method of a dynamic wireless power supply system based on a voltage doubler rectifier. Background technique [0002] Wireless Power Transfer (WPT), also known as wireless power transfer, non-contact power transfer, refers to the conversion of electrical energy into other forms of relay energy (such as electromagnetic field energy, laser, microwave and mechanical waves, etc.) After air transmission for a certain distance, the relay energy is converted into electrical energy through the receiver to realize wireless energy transmission. Due to the limitations of energy and environmental pollution, battery capacity and charging infrastructure, the charging problem is called the biggest bottleneck in the development of electric vehicles, and both wired charging and static wireless charging technologies have frequent chargin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J50/12H02J50/40
CPCH02J50/12H02J50/40
Inventor 麦瑞坤刘顺攀倪嘉蔚周凌云何正友
Owner SOUTHWEST JIAOTONG UNIV
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