METHOD OF MODELING EQUIVALENT CIRCUIT OF MAGNETIC COUPLED COIL CIRCUIT IN WHICH TX COIL AND RX COIL ARE MISALIGNED IN CONDUCTIVE MEDIUM AND WIRELESS POWER TRANSFER SYSTEM USING THE SAME

• Main Authors: HUH SUNG RYUL, AHN SEUNG YOUNG, LEE BOM SON, KIM HAE RIM, KIM JONG WOOK, PARK BUM JIN, PARK DONG RYUL
• Format: Patent
• Language: English; Korean
• Published: 21.06.2023
• Subjects: CALCULATING; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTINGELECTRIC POWER; COMPUTING; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; GENERATION; MEASURING; MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES; PHYSICS; SYSTEMS FOR STORING ELECTRIC ENERGY; TESTING

An equivalent circuit modeling method for a magnetic coupled coil circuit comprises the steps of: calculating an eddy current impedance based on a first parameter representing the structural characteristics of a magnetic coupled coil circuit, a second parameter indicating the characteristics of a conductive medium, and a third parameter indicating the misalignment characteristics between a transmitting coil and a receiving coil included in the magnetic coupled coil; calculating a Z-parameter of the magnetic coupled coil circuit by reflecting the eddy current impedance; and modeling a two-port equivalent circuit of the magnetic coupled coil circuit based on the Z-parameter. The eddy current impedance includes a first eddy current impedance (Z), a second eddy current impedance (Z), and a third eddy current impedance (Z). The third eddy current impedance is calculated by performing line integral on a tangential component electric field of the receiving coil. According to the present invention, it is possible to simply and accurately calculate the power transfer efficiency of a magnetic coupled coil circuit. 자기 결합 코일 회로의 등가 회로 모델링 방법은 자기 결합 코일 회로의 구성 특성을 나타내는 제1 파라미터, 전도성 매질의 특성을 나타내는 제2 파라미터, 및 상기 자기 결합 코일에 포함된 송신 코일과 수신 코일 사이의 오정렬 특성을 나타내는 제3 파라미터를 기초로 와전류 임피던스를 산출하는 단계, 상기 와전류 임피던스를 반영하여 상기 자기 결합 코일 회로의 Z-파라미터를 산출하는 단계, 및 상기 Z-파라미터를 기초로 상기 자기 결합 코일 회로의 2포트 등가 회로를 모델링하는 단계를 포함한다. 상기 와전류 임피던스는 제1 와전류 임피던스(Z11_eddy), 제2 와전류 임피던스(Z22_eddy), 및 제3 와전류 임피던스(Z21_eddy)를 포함한다. 상기 제3 와전류 임피던스는 상기 수신 코일의 탄젠셜(tangential) 성분 전기장을 선적분하여 산출된다.