Magnetic coupling resonant radio energy transmission structure based on passive LC resonance coil
A resonant radio and resonant coil technology, applied in the direction of circuit devices, electrical components, etc., can solve problems such as the inability to realize large-angle power transmission, and achieve the expansion of transmission distance and angle, expansion of distance and angle, transmission angle and transmission distance. Effect
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Embodiment 1
[0044] The present invention lists the Kirchhoff equation through the mutual inductance model of the multi-level resonant coil, thereby obtaining the current at all levels and the reflected impedance at all levels, that is, the current formula of the resonant coil at all levels is as follows:
[0045]
[0046] Without taking into account the mutual inductance that exists between non-adjacent LC resonant coils, and Then the following is the size of the equivalent impedance of each level of reflection:
[0047]
[0048] in Then, according to the current and reflection impedance formulas of the LC resonant structures at all levels calculated according to the above formula, the output power is obtained as:
[0049] P 0 =|I n | 2 R L =f 1 (k 1 ,k 2 ,...,k n-1 , R 1 , R 2 ,...,R n , R L ) (1)
[0050] The function of system efficiency can also be obtained:
[0051]
[0052] When resonance occurs, Then for the resonant system, each stage of the LC resonant s...
Embodiment 2
[0071] The present invention first uses a capacitor series (SS) compensation resonance structure, and then adds two LC resonance coils on this structure, so that the whole structure becomes a four-resonance coil magnetically coupled wireless power transmission. The function is to enable the transmission distance of wireless energy to be expanded. like figure 1 As shown, the first resonant tank consists of L 1 , C 1 , R 1 Composed of, the second resonant tank consists of L 2 , C 2 , R 2 composition, the third resonant tank is formed by L 3 , C 3 , R 3 constituted, the fourth resonant tank is passed through L 4 , C 4 , R 4 , R L made up of.
[0072] Then the reflection impedance corresponding to the fourth resonant circuit being equivalent to the third resonant circuit is:
[0073]
[0074] The reflection impedance of the third resonant circuit equivalent to the second resonant circuit is:
[0075]
[0076] The reflection impedance of the second resonant cir...
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