Winding elements such as inductors, transformers, motors, etc., consisting of one or more radio filled coils, generally require the following path to evaluate the quality of the winding elements fully:

1, the winding resistance DCR (copper resistance), winding sensation (L) coil number, N, coil number share (Np/Ns), coil capacity (Cp), iron core status (Q, ACR, LK), etc., are attributed to the low voltage parameter test. The project uses automatic pressure change test system, LCR digital bridge, coil tester, DC low resistance tester and so on.

2 、 the pressure and insulation degree of the coil and coil to the iron core and the outer shell, etc., the use of withstand voltage tester and insulation resistance tester.

The inspection of the components used in the production process, electrical and electronic products, even if the short-term function is normal, but the long-term use may also because of poor insulation of the coil itself and the adverse factors of potential, and the impact of commodity of life and stability. The questions reflect the product of poor insulation, poor durability, life is short; poor anti noise ability; high temperature stability is not good. Common adverse factors: the formation of coil insulation enameled wire, insulating tape or poor insulation skeleton line; initial planning method or processing technology bad; lead did not leave after the interval or solder the safety of pollutants.

The wireless charging coil launch process is completed, the test pulse magnetic material before adding, can be found as follows: the bad situation of poor insulation coil itself (front sight and discharge waveform attenuation); the number of coil wiring or significant fault front (change Lx, preceding the resonant cycle); winding fault (parallel capacitor Cx changes after the period resonant period).