Rogowski Coil Centered on the Printed Board Technology

The printed wire lay down along the single-printed-board or double-printed-board is adopted to produce single-printed-board winding and double-printed-board winding.The two types of printed-board windings can represent the traditional Rogowski coil centered on the conventional winding structure.For increasing the amplitude of the induced potential and improving the anti-interface ability of the printed-board type Rogowski coil,the method by connecting the same printed-board windings in series is suitable.Two double-printed-boards coils in series and two single-printed-board coils in series are proposed to measure the discharging current of the pulse power source.Operation principles and equivalent circuits of the two types of printed board Rogowski coils are analyzed,respectively.The parameter models of self-inductance,mutual inductance,equivalent inductance and damping resistance for both the single-printed-board winding and the double-printed-board winding are presented.Characteristic impedance-frequency and phase-frequency curves for both the single-printed-board winding and the double-printed-board winding are analyzed and presented.The method used to judge the validity of the test results is proposed.Experimental results verify the truth of the design principles and methods of the printed board Rogowski coils including double-printed-board Rogowski coils in series and single-printed-board Rogowski coils in series.Printed-board Rogowski coils in series connection can improve the sensor anti-interface ability.