Forward DC-DC converter
AssigneeKabushiki Kaisha Toyota Jidoshokki
InventorDaisuke Takeuchi
Life of this patent
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Abstract
A converter includes a core around which a primary winding and a secondary winding of a transformer, as well as a smoothing coil, are wound. A core includes a first base; a second base; an intermediate portion located between the first base and the second base, a first middle leg which is located between the first base and a third core component and around which the primary winding and the secondary winding are wound, a second middle leg which is located between the second base and the intermediate portion and around which the smoothing coil is wound. A winding direction of the primary winding from a first end toward a second end, a winding direction of the secondary winding from a third end toward a fourth end, and a winding direction of the smoothing coil from a fifth end toward a sixth end are identical.
Claims3
A forward DC-DC converter, comprising:
- a transformer including a primary winding and a secondary winding;
- a switching element electrically connected to the primary winding;
- a rectifier circuit electrically connected to the secondary winding;
- a smoothing reactor including a smoothing coil, the smoothing coil being electrically connected to the secondary winding;
- a core around which the primary winding, the secondary winding, and the smoothing coil are wound;
- a first circuit board that holds the primary winding and the secondary winding;
- and
- a second circuit board that holds the smoothing coil, wherein
- the core includes:
- a first base;
- a second base;
- an intermediate portion located between the first base and the second base;
- a first middle leg which is located between the first base and the intermediate portion and around which the primary winding and the secondary winding are wound;
- two first outer legs located respectively on opposite sides of the first middle leg between the first base and the intermediate portion;
- a second middle leg which is located between the second base and the intermediate portion and around which the smoothing coil is wound;
- and
- two second outer legs located respectively on opposite sides of the second middle leg between the second base and the intermediate portion,
- one end of the primary winding is a first end electrically connected to a positive electrode of a direct-current power supply, and the other end of the primary winding is a second end electrically connected to a negative electrode of the direct-current power supply,
- one end of the secondary winding is a third end electrically connected to a positive input terminal of the rectifier circuit, and the other end of the secondary winding is a fourth end electrically connected to a negative input terminal of the rectifier circuit,
- one end of the smoothing coil is a fifth end electrically connected to a positive output terminal of the rectifier circuit, and the other end of the smoothing coil is a sixth end electrically connected to a negative output terminal of the rectifier circuit, and
- a winding direction of the primary winding from the first end toward the second end, a winding direction of the secondary winding from the third end toward the fourth end, and a winding direction of the smoothing coil from the fifth end toward the sixth end are identical.
Dependencies are inferred from the claim text.