Coupling parameter identification method, device and wireless power transmission system
A technology for wireless power transmission and coupling parameters, applied in measurement devices, circuit devices, electrical components, etc., to solve problems such as detuning or deviation from the soft switching operating point, system deviation from working state, and impact on transmission performance.
Active Publication Date: 2022-05-27
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST +1
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Problems solved by technology
When the relative position between the primary and secondary coils changes, the coil self-inductance and mutual inductance will also change accordingly, causing the system to deviate from the predetermined working state (for example, the system has different degrees of detuning or deviates from the soft switching operating point, etc. ), affecting transmission performance
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[0034] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the present disclosure will be further described in detail below with reference to the specific embodiments and the accompanying drawings.
[0035] It should be noted that, unless otherwise defined, the technical or scientific terms used in one or more embodiments of the present specification shall have the usual meanings understood by those with ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and similar terms used in one or more embodiments of this specification do not denote any order, quantity, or importance, but are merely used to distinguish the various components. "Comprises" or "comprising" and similar words mean that the elements or things appearing before the word encompass the elements or things recited after the word and their equivalents, but do not exclude other elements or things. Words like "connected" or "con...
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One or more embodiments of this specification provide a coupling parameter identification method, device, and wireless power transfer system. When the DC power supply is turned on and the load is not connected, the system model of the wireless power transfer system is used to determine the coupling parameter in this state. The first theoretical inverter steady-state output current, measured to obtain the first inverter steady-state output current value, according to the first theoretical inverter steady-state output current and the first inverter steady-state output current value, determine the primary side coil from Inductance; connect the DC power supply and load, according to the system model, determine the second theoretical inverter steady-state output current and theoretical load voltage in this state, measure the second inverter steady-state output current value and load voltage value, according to The second theoretical inverter steady-state output current and the second inverter steady-state output current value, the theoretical load voltage and the load voltage value determine the mutual inductance and the self-inductance of the secondary coil. Using the method of this embodiment, the self-inductance of the primary coil, the self-inductance of the secondary coil, and the mutual inductance of the primary and secondary coils can be detected and identified.
Description
technical field [0001] One or more embodiments of this specification relate to the technical field of power transmission, and in particular, to a coupling parameter identification method, device, and wireless power transmission system. Background technique [0002] In recent years, Magnetic Coupling Wireless Power Transfer (MC-WPT) technology has gradually become a research hotspot in the field of engineering applications due to its safety and convenience. In practical applications, in order to increase the coupling parameters of the coupling mechanism, most systems will add a magnetic core to the primary and secondary coils. When the relative position between the primary and secondary coils changes, the self-inductance and mutual inductance of the coils will also change, causing the system to deviate from the predetermined working state (for example, the system is detuned to different degrees or deviates from the soft-switching operating point, etc. ), which affects the tr...
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IPC IPC(8): H02J50/10H02J50/12G06F17/10G01R27/26
CPCH02J50/10H02J50/12G06F17/10G01R27/2611
Inventor 刘华东傅群锋麦瑞坤罗文广刘野然乐文韬周振邦姜耀伟许倍倍
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST