Magnetically controlled variable transformer
OwnerCharles T. Kleinerinventor
Life of this patent
Estimating the term…
Abstract
A magnetically controlled variable transformer comprising magnetic cores and windings by which to accurately and reliably control electrical AC output power. The cores and windings act as a continuously variable turns-ratio transformer for use primarily at high power frequency applications (e.g. 400 KHz or higher), such as in aircraft and aerospace vehicles. The transformer of the present invention is implemented by coupling a 2-core variable saturable transformer to a fixed turns ratio linear transformer. By varying a DC control current to a DC control winding which is magnetically coupled to the saturable transformer, the AC output voltage at a resistive or reactive load can be varied from zero to full power, whereby the control range of the transformer can be maximized.
Claims13
A magnetically controlled transformer connected between an electrical source and an electrical load by which to controllably apply power from said source to said load, said transformer comprising:
- a variable saturable transformer having primary and secondary windings;
- a fixed turns ratio linear transformer having primary and second windings, the primary and secondary windings of said saturable and linear transformers being respectively connected with one another in electrical series;
- a DC control winding coupled magnetically to said saturable transformer;
- and
- a DC current source connected to said DC control winding for driving said winding, such that the output power of said magnetically controlled transformer to said load is directly related to the DC current supplied from said current source to said control winding.
A magnetically controlled transformer connected between an electrical source and an electrical load to controllably apply power from said source to said load, said transformer comprising:
- saturable core means having primary and secondary windings;
- non-saturable core means having primary and secondary windings, the primary winding of each of said saturable and non-saturable core means being connected with one another in electrical series to form the primary winding of said magnetically controlled transformer, and the secondary winding of each of said saturable and non-saturable core means being connected with one another in electrical series to form the secondary winding of said magnetically controlled transformer;
- a DC control winding magnetically coupled to said saturable core means;
- and
- a DC current source connected to said DC control winding, such that the output of said transformer to said load is directly related to the DC current supplied from said current source to said control winding.
A magnetically controlled transformer connected between an electrical sourse and an electrical load to controllably apply power from said source to said load, said transformer comprising:
- first and second saturable cores, each of said cores having a primary and a secondary winding, the primary and secondary windings of said cores being respectively connected with one another in electrical series;
- a non-saturable core having a primary and secondary winding, the primary windings of said saturable and non-saturable cores being interconnected with one another in electrical series to form the primary winding of said magnetically controlled transformer, and the secondary windings of said saturable and non-saturable cores being interconnected with one another in electrical series to form the secondary winding of said magnetically controlled transformer;
- a DC control winding coupled magnetically to and wound between said saturable cores;
- and
- a DC current source connected to said DC control winding for driving said winding, such that the output of said transformer to said load is directly related to the magnitude of the DC current supplied from said current source to said control winding.
Dependencies are inferred from the claim text.