DC-to-DC bidirectional voltage converters and current sensor

• US 5,636,108 A
• Filed: 01/11/1996
• Issued: 06/03/1997
• Est. Priority Date: 01/13/1995
• Status: Expired due to Term

• Current Assignee: Sextant Avionique
• Original Assignee: Sextant Avionique
• Inventors: Taurand, Christophe
• Primary Examiner(s): Wong, Peter S.
• Assistant Examiner(s): BERHANE, ADOLF D
• Application Number:
  US08/584,661
• Time in Patent Office: 509 Days
• Field of Search: 363/20, 363/16, 363/17, 363/18, 363/19, 363/21, 363/97, 363/98, 363/131, 363/132, 363/127
• US Class Current: 363/20
• CPC Class Codes: H02M 3/33584 Bidirectional converters
• CPC Class Codes: Y02B 70/10 Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

Abstract

A non-resonant voltage converter includes an inductive element, a primary circuit including a first chopping switch and a first diode in parallel, a secondary circuit including a second chopping switch and a second diode in parallel, at least a smooth switching capacitor of one of said switches, which can form, with a spurious inductance of the inductive element, an oscillating circuit which generates a spurious current. The smooth switching capacitor of the converter is connected in parallel to the terminals of the inductive element, and forms with this element a loop having a reduced length in which is contained the spurious oscillating current.

Claims

1. A non-resonant voltage converter, comprising:

a transformer including a first primary winding coupled in series with a second primary winding, and a first secondary winding coupled in series with a second secondary winding;

a first switch and a first diode both coupled in parallel with at least one of said primary windings thereby forming a primary circuit;

a second switch and a second diode both coupled in parallel with at least one of said secondary windings thereby forming a secondary circuit; and

a first capacitor coupled in parallel with at least one of said primary windings.

2. The converter of claim 1, which further includes a second capacitor coupled in parallel with at least one of said secondary windings.

3. The converter of claim 2, wherein said first switch and said second switch are both MOS Transistors.

4. The converter of claim 3, wherein said first capacitor and said second capacitor have a value greater than a spurious capacitance of said MOS Transistors.

5. The converter of claim 1, wherein said primary circuit includes said first primary winding and said first capacitor is coupled to said second primary winding.

6. A non-resonant voltage converter, comprising:

a transformer including a first primary winding coupled in series with a second primary winding, and a first secondary winding coupled in series with a second secondary winding;

a first switch and a first diode both coupled in parallel with at least one of said primary windings thereby forming a primary circuit;

a second switch and a second diode both coupled in parallel with at least one of said secondary windings thereby forming a secondary circuit; and

a first capacitor coupled in parallel with at least one of said secondary windings.

7. The converter of claim 6, which further includes a second capacitor coupled in parallel with at least one of said primary windings.

8. The converter of claim 7, wherein said first switch and said second switch are both MOS Transistors.

9. The converter of claim 8, wherein said first capacitor and said second capacitor have a value greater than a spurious capacitance of said MOS Transistors.

10. The converter of claim 6, wherein said secondary circuit includes said first secondary winding and said first capacitor is coupled to said second secondary winding.