DC-DC converter
First Claim
1. A DC to DC converter connected to first positive and negative power lines and second positive and negative power lines for transferring a DC voltage between the first positive and negative power lines and the second positive and negative power lines, said DC to DC converter comprising:
- magnetic circuit having a first primary winding, a second primary winding, a third primary winding, a fourth primary winding, a first secondary winding, and a second secondary winding, said first and second primary windings being magnetically coupled to the first secondary winding, said third and fourth primary windings being magnetically coupled to the second secondary winding, said first and third primary windings being coupled in series to form a first coil member, said second and fourth primary winding being coupled in series to form a second coil member, one end of said first coil member being coupled to the first positive power line;
a first switching element coupled between the first negative power line and the other end of the first coil member; and
a first capacitor coupled between the first negative terminal and one end of the second coil member.
1 Assignment
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Accused Products
Abstract
In a DC to DC converter, first and second primary windings are magnetically coupled to a first secondary winding. Third and fourth primary windings are magnetically coupled to a second secondary winding. The first and second primary windings are magnetically coupled to the first secondary winding. The third and fourth primary windings are magnetically coupled to the second secondary winding. The first and third primary windings are coupled in series to form a first coil member. The second and fourth primary windings are coupled in series to form a second coil member. One end of the first coil member is coupled to the first positive power line. A first switching element is coupled between the first negative power line and the other end of the first coil member. A first capacitor is coupled between the first negative terminal and one end of the second coil member.
78 Citations
41 Claims
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1. A DC to DC converter connected to first positive and negative power lines and second positive and negative power lines for transferring a DC voltage between the first positive and negative power lines and the second positive and negative power lines, said DC to DC converter comprising:
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magnetic circuit having a first primary winding, a second primary winding, a third primary winding, a fourth primary winding, a first secondary winding, and a second secondary winding, said first and second primary windings being magnetically coupled to the first secondary winding, said third and fourth primary windings being magnetically coupled to the second secondary winding, said first and third primary windings being coupled in series to form a first coil member, said second and fourth primary winding being coupled in series to form a second coil member, one end of said first coil member being coupled to the first positive power line;
a first switching element coupled between the first negative power line and the other end of the first coil member; and
a first capacitor coupled between the first negative terminal and one end of the second coil member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A DC to DC converter interposed between a first voltage system and a second voltage system for transferring power between the first and second voltage system, wherein said first voltage system has a DC power supply and a power supply switch connected to each other in series, said DC to DC converter comprising:
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a smoothing capacitor coupled to the first voltage system, the series connected DC power supply and the power supply switch in parallel; and
a controller coupled to the power supply switch and configured to, when the power supply switch is off state, transfer power from the second voltage system to the first voltage system to precharge voltage based on the transferred power to the smoothing capacitor and to turn on the power switch after the precharge is completed. - View Dependent Claims (22, 23)
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24. A DC to DC converter comprising:
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a converting circuit comprising;
a coil member having a predetermined inductance;
a first switching element coupled to the coil member and subjected through the coil member to an input DC voltage, said first switching element being configured to intermittently cause a current to flow into the coil member; and
a clamp circuit having a capacitor and a second switching element connected to each other in series, said clamp circuit being connected to the coil member in parallel, said second switching element and said first switching element complementally operating to attenuate magnetic energy generated in the coil member when the first switching element is off state, a controller coupled to the first switching element and the second switching element and intermittently turning on them, said controller controlling to increase an on duty ratio of the first switching element with increasing voltage applied to the first switching element, wherein said controller controls a maximum value of the on duty ratio of the first switching element so that the maximum value is less than a predetermined limit value that decreases with the increase of the input DC voltage.
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25. An integrated transformer assembly comprising:
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a first coil assembly having a first primary winding, a second primary winding, and a first secondary winding, said first primary winding, said second primary winding, and said first secondary winding are magnetically coupled to each other;
a second coil assembly having a third primary winding, a fourth primary winding, and a second secondary winding, said third primary winding, said fourth primary winding, and said second secondary winding are magnetically coupled to each other; and
a core body provided with a plurality of core portions and at least one substantially annular slot formed to surround at least one of the plurality of core portions, at least one of said windings in the first coil assembly being contained in the at least one annular slot and wound around at least one of the plurality of core portions, at least one of said windings in the second coil assembly being contained in the at least one annular slot and wound around at least one of the core portions, at least one of the plurality of core portions constituting a common magnetic path of the first and the second coil assemblies. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41)
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Specification