AC / DC Power Toroidal Coil Air Core Durable Temperature Resistance

AC / DC Power Toroidal Coil Air Core Durable Temperature Resistance

Toroidal Coil

It is a sensor to measure welding current. A copper wire is multi-lapped around belt-shaped core. Also, it is called Rogowskii coil, whose theory has been known since early times.

Material: Air core

Power: 1Watt~20KWatt

Hi-Pot: 0.0KVrms

Working frequency: 50Hz~1GHz

Working Temperature: -20'C~+125'C

Features

A toroid has a magnetic field inside of itself that forms a series of concentric circles. Outside of it, the field is zero. The strength of this magnetic field depends on the number of coils the toroid has on its body. The field is not uniform, because the field is stronger near the inner part of the ring than it is nearer the outer part. This means that if r is the radius of the transformer, the magnetic field decreases as r becomes larger.

Disadvantages and Advantages

Toroids have some disadvantages over regular solenoids. They are harder to wind and also to tune. However, they are more efficient at producing needed inductances. For the same inductance as a regular solenoid, a toroid requires fewer turns, and can be made smaller in size. Another advantage is that since the magnetic field is confined to the inside, toroids and toroidal transformers can be placed near other electronic components without concern about unwanted inductive interactions.