Control Method of Circuit Topology for Exciting Transmitter Coil in Triangulation Method
A technology of circuit topology and triangulation positioning, which is applied to circuit devices, charging stations, electric vehicles, etc., and can solve problems such as affecting the efficiency of power transmission and performance degradation of wireless power transmission systems
Active Publication Date: 2022-07-12
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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Problems solved by technology
[0003] During the wireless charging of electric vehicles, the inaccurate parking position of the car will lead to a sharp decline in the performance of the wireless power transmission system, seriously affecting the power transmission efficiency
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[0032] Preferred embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While preferred embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
[0033] In the triangulation method, a transmitting coil is set at the transmitting end, and three coils are set at the receiving end: a receiving coil, a first auxiliary coil and a second auxiliary coil, each with a corresponding induction area. The premise of using the triangulation method is that the transmitter coil is located in the common induction area of the receiver coil and the two auxiliary coils. However, in practical applications...
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The invention provides a circuit topology structure and a control method for exciting a transmitter coil in a triangulation positioning method. The circuit structure includes: branch T, branch T connected in parallel 1 and branch T 2 , the branch T includes a series-connected switch S T with the resonant capacitor C T , the branch T 1 Including switch S in series 1 with the resonant capacitor C T1 , the branch T 2 Including switch S in series 2 with the resonant capacitor C T2 ; DC power supply, with switch S U , resistance R T , inductance L T and the branch T and the branch T connected in parallel 1 or branch T 2 series connection; switch S D with the DC power supply and switch S U in parallel, and with the resistor R T , inductance L T After connecting in series with the branch T and the branch T 1 or branch T 2 connected in parallel. In the present invention, by setting the switch S U , S D The switching frequency and on-time of the circuit can be adjusted accordingly, and the resonant frequency of the circuit topology can be adjusted so that it can work at three resonant frequencies suitable for the three coils at the receiving end.
Description
technical field [0001] The invention belongs to the field of wireless charging of electric vehicles, relates to a triangulation method technology of wireless charging, and more particularly relates to a circuit topology structure and a control method for exciting a transmitter coil to detect distance in the triangulation method of wireless charging of electric vehicles. Background technique [0002] In order to save energy and reduce environmental pollution, electric vehicles have been vigorously promoted by countries all over the world. Due to the limitations of battery capacity and charging infrastructure, the charging problem has become the most important bottleneck in the development of electric vehicles. Since wireless charging technology can solve the interface limitations and safety problems faced by traditional conductive charging, it has gradually developed into the main way of charging electric vehicles. However, wired charging has many inconveniences. In this co...
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IPC IPC(8): B60L53/12B60L53/38H02J50/90H02J50/12
CPCB60L53/12B60L53/38H02J50/90H02J50/12Y02T90/14
Inventor 张瑞宏
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL