Induction coil having internal and external faradic rings
AssigneeAjax Tocco Magnethermic Corporation
InventorDavid A. Lazor
Life of this patent
Estimating the term…
Abstract
An induction furnace includes a pair of induction coils with a pair of faraday rings disposed between the induction coils to substantially prevent mutual inductance between the first and second induction coils. The induction coils preferably have a different size circumference and may be coplanar. The prevention of mutual inductance provided by the faraday rings is particularly useful for a pusher furnace in which adjacent furnace sections are heated to different and rather specific temperatures.
Claims20
An induction furnace comprising:
- a first heating section including a first induction coil;
- a second heating section including a second induction coil adjacent the first induction coil and spaced therefrom;
- first and second faraday rings disposed between the first and second induction coils to help prevent mutual inductance between the first and second induction coils;
- and
- wherein the first faraday ring has a circumference which is smaller than that of the second faraday ring;
- and the first and second faraday rings are oriented along a common plane.
An induction furnace comprising:
- a first heating section including a first induction coil;
- a second heating section including a second induction coil adjacent the first induction coil and spaced therefrom;
- first and second faraday rings disposed between the first and second induction coils to help prevent mutual inductance between the first and second induction coils;
- wherein the first and second faraday rings are respectively oriented substantially along first and second parallel planes which are spaced from one another;
- and
- the faraday rings circumscribe a common line which is perpendicular to the parallel planes.
An induction furnace comprising:
- a first heating section including a first induction coil;
- a second heating section including a second induction coil adjacent the first induction coil and spaced therefrom;
- first and second faraday rings disposed between the first and second induction coils to help prevent mutual inductance between the first and second induction coils,
- wherein the faraday rings are substantially coplanar and circumscribe a common center.
An induction furnace comprising:
- a first heating section including a first induction coil;
- a second heating section including a second induction coil adjacent the first induction coil and spaced therefrom;
- first and second faraday rings disposed between the first and second induction coils to help prevent mutual inductance between the first and second induction coils;
- and
- wherein each of the induction coils and faraday rings circumscribe a common line.
An induction furnace comprising:
- a first heating section including a first induction coil;
- a second heating section including a second induction coil adjacent the first induction coil and spaced therefrom;
- first and second faraday rings disposed between the first and second induction coils to help prevent mutual inductance between the first and second induction coils;
- a susceptor which extends through the first and second induction coils;
- and wherein the first and second rings circumscribe the susceptor.
Dependencies are inferred from the claim text.