Abstract A variable leakage transformer or a variable voltage transformer comprising a magnetic core with a main magnetic path and a sub-magnetic path, the main magnetic path having at least a common magnetic path with the sub-magnetic path, a primary winding wound on said common magnetic path of the core, a secondary winding wound on said main magnetic path of the core, and means for controlling the magnetic flux in said sub-magnetic path. By controlling the magnetic flux in the sub-magnetic path, the leakage of the flux induced by the primary winding from the main magnetic path to the sub-magnetic path can be controlled, thus the coupling between the primary and secondary windings, and conduction period in each cycle of the AC output voltage are controlled. The control of the conduction period in each cycle provides the control of the power transmitted from the primary winding to the secondary winding.
A variable leakage transformer, comprising: first, second and third magnetic core pieces, each forming a closed magnetic path and having a common leg and another leg, said common legs being in mutual juxtaposition, with each of said core pieces being rotatable about the common leg thereof, a primary winding wound about said juxtaposed common legs of said core pieces, a secondary winding wound about the other leg of said first core piece, a control winding wound about at least one of the other legs of said second and third core pieces, and means coupled to said control winding for controlling the magnetic flux in said common leg of said first core piece.
Claim 2
Dependent Claim
112 words
A variable leakage transformer, comprising: first, second and third magnetic core pieces, each forming a closed magnetic path and having a common leg and another leg, said common legs being in mutual juxtaposition, with each of said core pieces being rotatable about the common leg thereof, a primary winding wound about said juxtaposed common legs of said core pieces, a secondary winding wound about the other leg of said first core piece, a control winding wound about at least one of the other legs of said second and third core pieces, and means coupled to said control winding for controlling the magnetic flux in said common leg of said first core piece.