Isolated flyback secondary inductor convertor
AssigneeLucent Technologies Inc.
InventorsSimon Fraidlin, Anatoly G. Polikarpov, Nickolay A. Snetkov
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Abstract
An isolated flyback secondary inductor converter (IFSIC) and method of operation thereof. The IFSIC has a transformer with a primary winding for receiving electrical energy from a source of electrical power and a secondary winding coupled to the primary winding. The IFSIC also has a switch for intermittently coupling the transformer to the source of electrical power. The IFSIC includes a series-coupled inductor and diode coupled in parallel with the secondary winding to provide a path for the energy from the transformer when the transistor is ON, allowing the energy to be stored in the inductor rather than in the transformer.
Claims20
An isolated flyback secondary inductor converter (IFSIC) having a transformer with a primary winding for receiving electrical energy from a source of electrical power and a secondary winding coupled to said primary winding, said converter also having a switch for intermittently coupling said transformer to said source of electrical power, said converter, comprising:
- a series-coupled inductor and diode coupled in parallel with said secondary winding to provide a path for said energy from said transformer when said transistor is ON, allowing said energy to be stored in said inductor rather than in said transformer.
A method of operating an isolated flyback secondary inductor converter (IFSIC) having a transformer with a primary winding for receiving electrical energy from a source of electrical power and a secondary winding inductively coupled to said primary winding, said converter also having a switch for intermittently coupling said transformer to said source of electrical power, the method comprising the steps of:
- providing a path for said energy from said switch when said switch is ON with a series-coupled inductor and diode coupled in parallel with said secondary winding;
- and
- storing said energy in said inductor rather than in said transformer.
An isolated flyback secondary inductor converter (IFSIC), comprising:
- a transformer having first and second primary windings that receive electrical energy from a voltage source and a secondary winding inductively coupled to said primary windings that receives said energy from said primary windings;
- a transistor that intermittently couples said first primary winding to said source;
- an input diode that intermittently couples said second primary winding to said source;
- a controller that modulates a switching of said transistor;
- a first capacitor coupling said first and second primary windings;
- a series-coupled inductor and diode coupled in parallel with said secondary winding to provide a path for said energy from said transformer when said transistor is ON, allowing said energy to be stored in said inductor rather than in said transformer;
- and
- a second capacitor that receives said energy from said inductor, stores said energy and delivers said energy to an output of said converter.
Dependencies are inferred from the claim text.