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US 6,388,897 B1Granted
DC-to-DC converter and method for converting direct current to direct current
AssigneeDelta Electronics, Inc.
InventorsJianping Ying, Chau-Chun Wen, Hai Geng, Jianhong Zeng
Life of this patent
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Abstract
A DC-to-DC converter and a method thereof is provided. The DC-to-DC converter includes a power supply for providing a first direct current, a first capacitor, a first switch assembly for converting the first direct current into a first alternating current, a transformer for converting the first alternating current to a second alternating current, a rectifying circuit for converting and rectifying the second alternating current to a second direct current, a filtering circuit, and a range winding assembly for adjusting the output voltage of the second direct current in response to the voltage drop of the first direct current.
Claims25
A DC-to-DC converter, comprising:
- a power supply for providing a first direct current (DC);
- a first capacitor electrically connected to said power supply for being charged by said power supply;
- a first switch assembly electrically connected to said first capacitor for converting said first direct current (DC) into a first alternating current by switching said first switch assembly;
- a transformer having a primary winding and a secondary winding for converting said first alternating current to a second alternating current, wherein said primary winding is electrically connected to said first switch assembly and said secondary winding has a tap;
- a rectifying circuit electrically connected to said secondary winding for rectifying said second alternating current to a second direct current;
- a filtering circuit electrically connected to said rectifying circuit for filtering said second direct current;
- and
- a range winding assembly electrically connected to said secondary winding and being one portion of said secondary winding for adjusting a turn ratio of said transformer to maintain an output voltage of said second direct current in response to a voltage drop of said first direct current.
5 more elements
A DC-to-DC converter, comprising:
- a power supply for providing a first direct current (DC);
- a first capacitor electrically connected to said power supply for being charged by said power supply;
- a first switch assembly electrically connected to said first capacitor for converting said first direct current (DC) into a first alternating current by switching said first switch assembly;
- a transformer having a primary winding electrically connected to said first switch assembly and a secondary winding for converting said first alternating current to a second alternating current;
- a rectifying circuit electrically connected to a first end of said secondary winding for rectifying said second alternating current to a second direct current;
- a filtering circuit having an inductor and a second capacitor for filtering said second direct current, wherein said inductor is electrically connected to said rectifying circuit, and said second capacitor is electrically connected to a second end of said secondary winding;
- a subwinding electrically connected to said first end of said secondary winding;
- a second rectifying diodes electrically connected to said subwinding, wherein an output end of said subwinding is electrically connected to said inductor of said filtering circuit;
- a second switch electrically connected between said subwinding and said filtering circuit;
- and
- a control circuit electrically connected to said second switch for controlling said second switch to be turned on in order to adjust a turn ratio of said transformer to maintain an output voltage of said second direct current when the voltage of said first direct current is dropped.
8 more elements
A DC-to-DC converter, comprising:
- a power supply for providing a first direct current (DC);
- a first capacitor electrically connected to said power supply for being charged by said power supply;
- a first switch electrically connected to said first capacitor for converting said first direct current (DC) into a first alternating current by switching said first switch assembly;
- a transformer having a primary winding electrically connected to said first switch assembly and a secondary winding for converting said first alternating current to a second alternating current;
- a rectifying circuit electrically connected to said secondary winding for rectifying said second alternating current to a second direct current;
- a filtering circuit having an inductor and a second capacitor, and electrically connected to said rectifying circuit for filtering said second direct current;
- a second switch having one end electrically connected to a central tap of said primary winding and the other end electrically connected to said first capacitor;
- and
- a control circuit for controlling said first switch and said second switch in order to adjust a turn ratio of said transformer to maintain an output voltage of said second direct current in response to a voltage drop of said first direct current outputted from said power supply.
6 more elements
A method for converting direct current to direct current, adapted to be applied in a DC-to-DC converter, comprising steps of:
- charging a first capacitor;
- switching a first switch assembly for converting a first direct current outputted from said first capacitor into a first alternating current;
- converting said first alternating current to a second alternating current via a transformer, detecting whether a voltage of said first direct current is dropped, and adjusting a turn ratio of said transformer for maintaining an output voltage of said second alternating current in response to said voltage drop;
- rectifying said second alternating current into a second direct current via a rectifying circuit;
- and
- filtering said second direct current via a filtering circuit.
3 more elements
Dependencies are inferred from the claim text.