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A detection circuit and method for coupling coefficient between magnetically coupled inductor coils

A technology of inductance coil and detection circuit, applied in the direction of magnetic performance measurement, can solve the problems of large error, non-unique calculation expression, complex detection method, etc., and achieve the effect of low cost, accurate numerical calculation and easy construction

Active Publication Date: 2020-01-14
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0003] The purpose of the present invention is to provide a coupling coefficient detection circuit and method between magnetically coupled inductor coils for the existing magnetically coupled inductor coil coupling coefficient detection method is complicated, the calculation expression is not unique, and the error is relatively large; The technical solution is:

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  • A detection circuit and method for coupling coefficient between magnetically coupled inductor coils
  • A detection circuit and method for coupling coefficient between magnetically coupled inductor coils
  • A detection circuit and method for coupling coefficient between magnetically coupled inductor coils

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] In this embodiment, the coupling coefficient detection circuit between the magnetically coupled inductance coils, its principle is as follows figure 1 As shown, its circuit connection diagram is shown in figure 2 shown; including DC voltage supply, inverter, primary series capacitor C 1 , Primary variable trimming resistor R C1 , primary inductance coil L 1 , Secondary inductance coil L 2 , Secondary series capacitor C 2 , Secondary variable trimming resistor R C2 and sense resistor R L ; It is characterized in that the DC voltage power supply is connected to the two input terminals P of the inverter 0 ,P 1 , the primary variable trimmer resistor R C1 , primary series capacitor C 1 with the primary inductance coil L 1 The two output terminals of the inverter are connected in sequence to form a primary resonant circuit; the secondary...

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Abstract

The invention belongs to the technical field of coupling coefficient detection between inductance coils, and provides a coupling coefficient detection circuit and method for magnetically coupled inductance coils, which are used to overcome the defects of complex existing detection methods, non-unique calculation expressions, and large errors; the present invention The detection circuit includes a DC voltage power supply, an inverter, a primary series capacitor, a primary variable trimming resistor, a primary inductance coil, a secondary inductor coil, a secondary series capacitor, a secondary variable trimming resistor and a detection resistor; The two input terminals of the inverter, the primary variable trimming resistor, the primary series capacitor and the primary inductance coil are connected in sequence and then connected to the two output terminals of the inverter to form a primary resonant circuit; the secondary inductance coil, the secondary series capacitor , the secondary variable trimming resistor and the detection resistor are sequentially connected to form a secondary resonant circuit. The detection circuit of the invention is simple and easy to construct, and the analytical expression of the coupling coefficient is accurate and efficient.

Description

technical field [0001] The invention belongs to the technical field of coupling coefficient detection between inductance coils, and relates to a coupling coefficient detection circuit and method for magnetically coupled inductance coils. Background technique [0002] The detection of the coupling coefficient between the existing magnetically coupled inductor coils is usually expressed by a numerical expression, and the numerical solution of the coupling coefficient is obtained. First, the integral formula of the mutual inductance coefficient is derived by using the Biot-Savart law, and then the numerical calculation is performed. Analyze the situation and guess the non-extreme situation, use power series, exponent, logarithm or their combination to test, and then use numerical calculation to verify, and finally try to deduce that the two coils are at any distance (except that the two inductance coils are almost Approximate analytical expressions for mutual inductance and cou...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R33/12
CPCG01R33/12
Inventor 王京梅赵文俊林晓明董岳
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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