11 Replies Latest reply on Feb 23, 2019 2:22 PM by beacon_dave

    Special Purpose Inductor

    jw0752

      Tonight as I studied a power supply circuit board I came across an unusual inductor. I can speculate that it is designed for high current and high frequency but I really don't know. I am hoping to learn more about it. Can anyone give me some insight into the reasons for the design characteristic which includes heavy multi-strand wire for the conductor (roughly 1.5 mm diameter 18 AWG?).  Here are a couple pictures of the inductor which has a very stable inductance of 100 uH when tested up to 100 kHz.

       

        

       

      In the circuit it was in series with the collector of a PNP MJE253 Power transistor.

       

      Any insights would be educational.

       

      Thanks John