POWER SUPPLY USING SHARED FLUX IN A MULTI-LOAD PARALLEL MAGNETIC CIRCUIT
First Claim
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1. A power supply comprising:
- a primary winding provided to a first portion of a core of magnetic material having a non-linear hysteresis, the primary core energized by an AC voltage;
a first secondary circuit, said secondary circuit comprising a first secondary winding, at least one first control winding and a first control circuit, said first secondary winding and said first at least one control winding provided to said first control circuit, said first control circuit controlling a current through said at least one first control winding to at least partially regulate an output voltage of said first control circuit, said first secondary winding and said at least one first control winding provided to a second portion of said core of magnetic material to form a first magnetic flux loop comprising said first portion and said second portion; and
a second secondary circuit, said second secondary circuit comprising a second secondary winding, at least one second control winding and a second control circuit, said second secondary winding and said second at least one control winding provided to said second control circuit, said second control circuit controlling a current through said at least one second control winding to regulate a desired output voltage of said second control circuit, said second secondary winding and said at least one second control winding provided to a third portion of said core of magnetic material to form a second magnetic flux loop comprising said first portion and said third portion, said second flux loop in parallel with said first magnetic flux loop such that a magnetic flux through said primary winding comprises a combination of magnetic flux from said first magnetic flux loop and magnetic flux from said second magnetic flux loop.
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Abstract
A flux sharing magnetic circuit has a parallel arrangement of secondary flux loops with secondary windings to drive output loads. A shared pool of flux is provided by a primary winding. An AC driven primary delivers current to the secondary circuits to maintain a desired voltage or current to a load. One or more control windings control current in the parallel flux loops and thus control the power delivered to the loads.
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Citations
32 Claims
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1. A power supply comprising:
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a primary winding provided to a first portion of a core of magnetic material having a non-linear hysteresis, the primary core energized by an AC voltage; a first secondary circuit, said secondary circuit comprising a first secondary winding, at least one first control winding and a first control circuit, said first secondary winding and said first at least one control winding provided to said first control circuit, said first control circuit controlling a current through said at least one first control winding to at least partially regulate an output voltage of said first control circuit, said first secondary winding and said at least one first control winding provided to a second portion of said core of magnetic material to form a first magnetic flux loop comprising said first portion and said second portion; and a second secondary circuit, said second secondary circuit comprising a second secondary winding, at least one second control winding and a second control circuit, said second secondary winding and said second at least one control winding provided to said second control circuit, said second control circuit controlling a current through said at least one second control winding to regulate a desired output voltage of said second control circuit, said second secondary winding and said at least one second control winding provided to a third portion of said core of magnetic material to form a second magnetic flux loop comprising said first portion and said third portion, said second flux loop in parallel with said first magnetic flux loop such that a magnetic flux through said primary winding comprises a combination of magnetic flux from said first magnetic flux loop and magnetic flux from said second magnetic flux loop. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A method of voltage regulation, comprising:
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providing an alternating current to a primary winding to induce a magnetic flux in a first member of a core of magnetic material having a non-linear hysteresis curve; inducing a voltage in a first secondary winding provided to a second member of said core of magnetic material, wherein said first member and said second member form a first flux loop; inducing a voltage in a first control winding provided to said second member; controlling a current in said first control winding to produce a desired first output voltage across a series combination of said first secondary winding and said first control winding; inducing a voltage in a second secondary winding provided to a third member of said core of magnetic material, wherein said first member and said second member form a second flux loop in parallel with said first flux loop such that said flux through said first member is common to flux through said first flux loop and said second flux loop; inducing a voltage in a second control winding provided to said third member; and controlling a current in said first control winding to produce a desired second output voltage across a series combination of said first secondary winding and said first control winding. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A power supply, comprising:
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means for inducing flux in a common branch of a first flux loop and a parallel second flux loop; means for inducing a voltage in a first secondary winding and a first control winding from magnetic flux in said first flux loop; means for controlling a current in said first control winding to produce a desired first output voltage across a series combination of said first secondary winding and said first control winding; means for inducing a voltage in a second secondary winding and a second control winding provide to said second flux loop; and means for controlling a current in said first control winding to produce a desired second output voltage across a series combination of said first secondary winding and said first control winding. - View Dependent Claims (28, 29, 30, 31, 32)
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Specification