Direct current converter with integrated transformer windings and output voltage filtering coils on the same magnetic core
AssigneeNokia Corporation
InventorsPentti Nieminen, Marko Laitinen
Life of this patent
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Abstract
Chopper-type direct-current converter comprising a magnetic core (M), which comprises a first and a second side leg (MS1, MS2), the ends of which are connected to each other with pieces, and a center leg provided with an air gap and connected to the end pieces between the first and the second side legs. According to the invention, the secondary side filter coil is wound around the center leg. The primary and secondary windings are wound around the side legs so that the magnetic flux produced by them flows in the same direction as the magnetic flux of the filter coil.
Claims14
Chopper-type direct-current converter comprising:
- a magnetic core, which comprises:
- a first and a second side leg, the ends of which are connected to each other with end pieces;
- and
- a center leg provided with an air gap and connected to the end pieces between the first and second side legs;
- around which magnetic core are arranged:
- a primary winding;
- a secondary winding;
- and
- a secondary side filter coil;
- where
- the filter coil is wound around the center leg;
- and
- the primary and secondary windings are wound around the side legs so that the resulting magnetic fluxes associated with the primary and secondary windings flow in the same direction en in the side legs, and so that the magnetic return flux flows in the same direction en in the center leg as the magnetic flux associated with the filter coil.
Chopper-type regulator, comprising:
- a magnetic core, which comprises:
- a first and a second side leg, the ends of which are connected to each other with end pieces;
- and
- a center leg provided with an air gap and connected to the end pieces between the first and second side legs;
- around which magnetic core are arranged:
- two windings;
- and
- a filter coil, wherein
- the filter coil is disposed around the center leg;
- and
- the windings are disposed around the side legs so that the magnetic return flux associated with them flows in the same direction on the center leg as the magnetic flux associated with the filter coil.
Dependencies are inferred from the claim text.