A Method for Determining Topology of Constant Voltage Compensation Network in Wireless Power Transmission System
A technology of wireless power transmission and compensation network, applied in the direction of electrical components, circuit devices, etc., can solve problems such as complex design, difficulty in transformer parameters meeting constant voltage or constant current requirements, etc.
Active Publication Date: 2017-10-31
SOUTHEAST UNIV
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However, the output constant voltage and constant current of the above structure are affected by the parameters of the non-contact transformer. The parameters of the non-contact transformer are limited by space and distance, and the design is complicated. Under the limited space and distance, the transformer parameters may be difficult to meet. Constant voltage or constant current requirements
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[0053] Based on the two-port network theory, the present invention determines the impedance characteristics of the entire system two-port network according to requirements such as load independence and zero phase difference of input impedance, and decomposes the system two-port network into a primary side compensation network, a non-contact transformer, and a secondary side compensation network The three sub-two-port networks are cascaded, and then the parameter characteristics of the primary and secondary resonance compensation networks are obtained. The technical solution of the invention will be described in detail below in conjunction with the accompanying drawings.
[0054] figure 1 It is a block diagram of the constant voltage resonance compensation network of the present invention, including a primary side compensation circuit, a non-contact transformer, and a secondary side compensation circuit, where ω is the operating angular frequency, and C P is the capacitance va...
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The invention relates to a method for determining the topology of a constant voltage compensation network of a wireless power transmission system. The compensation network makes the output voltage of the wireless power transmission system independent of the load and is not limited by the parameters of the non-contact transformer, thereby simplifying the non-contact transformer design. In the present invention, the system voltage gain has nothing to do with the load, the system input impedance is purely resistive, and the system efficiency is maximized to determine the parameters of the compensation circuit, and then determine the topology of the constant voltage compensation network, and provide 4 groups of primary side and secondary side resonant networks The constant voltage compensation network topology can be equivalent to a T-type or Π-type network. The output voltage of the IPT system is not limited by the parameters of the non-contact transformer, which simplifies the design of the non-contact transformer; it can simultaneously realize the constant voltage output and unit power factor independent of the load, reduce the reactive power and reduce the stress requirements of the device , improve transmission efficiency.
Description
technical field [0001] The invention discloses a method for determining the topology of a constant voltage compensation network of a wireless power transmission system, which is suitable for wireless charging occasions and belongs to the technical field of wireless power transmission. Background technique [0002] Inductive Power Transfer (IPT) technology uses an alternating electromagnetic field as a medium to transmit energy to a load. Since there is no direct electrical contact, it can avoid electric sparks, is not affected by the environment, and can work in harsh environments. At present, IPT technology has been widely used in consumer electronics, lighting, electric vehicles and other fields. [0003] In order to transmit active energy efficiently, the IPT converter needs to have the following characteristics: 1. Zero reactive power, 2. Soft switching of switching devices, 3. Directly output the voltage or current required by the load. There is no reactive energy in ...
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IPC IPC(8): H02J50/10
Inventor 曲小慧景妍妍韩洪豆黄少聪谢智刚
Owner SOUTHEAST UNIV