Power supply with first and second capacitor sections in the transformer secondary
First Claim
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1. A power supply device that includes:
- a substrate that includes at least a semiconductor element;
a transformer;
a rectifying section that performs rectification; and
a filtering section that reduces alternating-current components, the power supply device comprising;
a first capacitor section that is connected in parallel to a rectifying element included in the rectifying section; and
a second capacitor section that is connected between one end and the other end of the transformer, generates one or more harmonic waves that reduce a peak value of a fundamental wave of resonance generated based on a leakage inductance component of the transformer and a capacitance component of the first capacitor section, whereinthe second capacitor section comprises a plurality of capacitors,the plurality of capacitors are connected with each other using a serial connection, a parallel connection, or a combination of a serial connection and a parallel connection, andthe second capacitor section includes an interconnected portion that interconnects the plurality of capacitors, the interconnected portion having an area greater than an area of one end side of the second capacitor section or an area of the other end side of the second capacitor section.
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Abstract
A power supply device includes a substrate, a transformer, a rectifying section, a filtering section, at least one first capacitor section, and a second capacitor section. The substrate includes at least one semiconductor element. The transformer inputs an electric power via at least one pair of primary-side terminals, transforms the input electric power, and outputs the transformed electric power via at least one pair of secondary-side terminals. The rectifying section includes at least one rectifying element configured to rectify the transformed electric power. The filtering section reduces alternating-current components included in the rectified electric power. The first capacitor section is connected in parallel to the at least one rectifying element. The second capacitor section generates one or more harmonic waves that reduce a peak value of a fundamental wave of resonance generated based on a leakage inductance component of the transformer and a capacitance component of the first capacitor section.
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Citations
14 Claims
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1. A power supply device that includes:
- a substrate that includes at least a semiconductor element;
a transformer;
a rectifying section that performs rectification; and
a filtering section that reduces alternating-current components, the power supply device comprising;a first capacitor section that is connected in parallel to a rectifying element included in the rectifying section; and a second capacitor section that is connected between one end and the other end of the transformer, generates one or more harmonic waves that reduce a peak value of a fundamental wave of resonance generated based on a leakage inductance component of the transformer and a capacitance component of the first capacitor section, wherein the second capacitor section comprises a plurality of capacitors, the plurality of capacitors are connected with each other using a serial connection, a parallel connection, or a combination of a serial connection and a parallel connection, and the second capacitor section includes an interconnected portion that interconnects the plurality of capacitors, the interconnected portion having an area greater than an area of one end side of the second capacitor section or an area of the other end side of the second capacitor section. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- a substrate that includes at least a semiconductor element;
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8. A power supply device that includes:
- a substrate that includes at least a semiconductor element;
a transformer;
a rectifying section that performs rectification; and
a filtering section that reduces alternating-current components, the power supply device comprising;a first capacitor section of which one end is connected between one end of the transformer and the rectifying section, and the other end is connected to a common potential portion; and a second capacitor section that is connected between one end and the other end of the transformer, generates one or more harmonic waves that reduce a peak value of a fundamental wave of resonance generated based on a leakage inductance component of the transformer and a capacitance component of the at least one first capacitor section, wherein the second capacitor section comprises a plurality of capacitors, the plurality of capacitors are connected with each other using a serial connection, a parallel connection, or a combination of a serial connection and a parallel connection, and the second capacitor section includes an interconnected portion that interconnects the plurality of capacitors, the interconnected portion having an area greater than an area of one end side of the second capacitor section or an area of the other end side of the second capacitor section. - View Dependent Claims (9, 10, 11, 12, 13, 14)
- a substrate that includes at least a semiconductor element;
Specification
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Current AssigneeDENSO Corporation
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Original AssigneeDENSO Corporation
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InventorsOkubo, Takuya
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Primary Examiner(s)Behm, Harry
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Application NumberUS14/256,026Publication NumberTime in Patent Office935 DaysField of SearchUS Class Current1/1CPC Class CodesH02M 1/12 Arrangements for reducing h...H02M 1/346 Passive non-dissipative snu...H02M 3/28 using discharge tubes with ...H02M 3/335 using semiconductor devices...Y02B 70/10 Technologies improving the ...
