Presentation is loading. Please wait.

Presentation is loading. Please wait.

Bifilar Wound Toroids Session 2 –Ferrite Transformers for Matching Amplifiers –Ferrite Cores for Transmission Lines/Baluns, EMI –Powdered Iron High Q inductors:

Similar presentations


Presentation on theme: "Bifilar Wound Toroids Session 2 –Ferrite Transformers for Matching Amplifiers –Ferrite Cores for Transmission Lines/Baluns, EMI –Powdered Iron High Q inductors:"— Presentation transcript:

1 Bifilar Wound Toroids Session 2 –Ferrite Transformers for Matching Amplifiers –Ferrite Cores for Transmission Lines/Baluns, EMI –Powdered Iron High Q inductors: Increased Inductance FT :1 Transformer Ferrite

2 I [Amps] B [tesla] L1 [H] Reversing Current Direction Reverses the Flux Operating Principles Right Hand Rule For a Solenoid I [Amps] B

3 Operating Principles Right Hand Rule For a Solenoid A simple Experiment with a compass Demonstrated in Lab

4 Ideal Transformers N1=N2 Identical Windings Lenz and Faraday 1 mA B2 B1 B1+B2 =0 Lossless

5 Series Connection of Inductors Bifilar Winding: Additive L1=L2 Leq= L1+L2+2M Leq = 4L1 if M = L1 Wind one Inductor: 10 Turns Bifilar Lead Length = 1.5 inches Dont solder windings yet Measure Single Turn Inductor LC mtr Solder Connections Measure Bifilar Inductor LC mtr Measure input impedance with AIM Compare Single turn and Bifilar Inductance Lbifilar #26 Gauge Yellow Core a b

6 Winding Bifilar Inductors Additive a b b a a a b b Layout wires per top left drawing. Check continuity Connect per top right: Solder a dot to b

7 Series Connection of Inductors Bifilar Winding: Subtractive L1=L2 Leq= L1+L2 - 2M Leq = 0 if M = L1 b a

8 Make one transformer: 10 Turns FT50-43 material Use #26 Gauge wire and supplied BNC connector Measure input impedance with AIM Impedance meter 2 mA 1 mA Subtractive Currents No flux in Toroid 4:1 Ferrite Transformer Bifilar Wound Zin = 50 Ohms Zload = 200 Ohms 1mA b a b a

9 4:1 Ferrite Transformer Bifilar Wound Zin = 50 Ohms Zload = 200 Ohms b a b a b is ground.. Bend end up to label a dot is connected to 200 Ohm resistor Connect b dot to a : insert into center pin of connector


Download ppt "Bifilar Wound Toroids Session 2 –Ferrite Transformers for Matching Amplifiers –Ferrite Cores for Transmission Lines/Baluns, EMI –Powdered Iron High Q inductors:"

Similar presentations


Ads by Google