Radiated noise countermeasures

 Radiated noise countermeasures in order to suppress common mode radiated noise, using a chip   MR16 ferrite beads. Since only install the bead in the L1 side radiated noise can not be reduced, so ① in the L1 and L2 two power lines are installed ferrite chip beads. Although this reduces the radiated noise, but still larger than the specified value.

  T8 Tube

Therefore, we changed the configuration of chip ferrite beads. Specifically, ② will be installed on the outside of the X capacitor beads moved to the X capacitor inside. Thereby further reducing the radiated noise, this dropped to a predetermined value or less. In other words, the effect of suppressing radiated noise due to X capacitor and chip ferrite bead position varies.

Optimal configuration varies due bulbs

  LED Flexi

Best suppress radiated noise component configuration varies due to LED bulbs. In other LED bulbs, despite the excellent results obtained taken ② in Figure 11 as configuration, that is arranged inside the X capacitor chip ferrite beads, but did not get the same excellent results. Chip Ferrite Beads so turn mounted to the outside of the X capacitor, this time, the radiation noise to a predetermined value (Figure 12). That is, for each LED light bulb, the noise suppression even with the same component, the effect is different.