Weston frequency meter

1. Weston frequency meter

3. Inductors
Impedance of a capacitor or an
inductor changes with frequency.
Let’s see how.

4. 𝑓 = 0.6 𝐻𝑧

5. 𝑓 = 1 𝐻𝑧

6. Simplified Weston Meter

8. Coil A
Coil A produces dominant flux
High frequency

9. Another view of Coil A

10. Coil B
Coil B produces dominant flux
Low frequency

11. Another view of Coil B

12. Same field intensity
Nominal frequency

14. Reluctance torque
Reluctance torque (alignment torque) is
experienced by a ferromagnetic object
placed in an external magnetic field,
which causes the object to line up with
the external magnetic field.

15. Iron piece
Coil A’s Flux is dominating

16. Simplified Weston Meter

17. Thank you & Acknowledgements
Inductor flux simulation – MIT TEAL SIM (JAVA)
Coil flux simulation – Visualis Electromagnetism
(OPENGL)
Reluctance torque (theory) – Theodore Wildi
Reluctance torque (Animation) - Reluctance motor rotation
animation 3