Claims
- 1. A device for converting an input signal from a supply to a DC output signal to be imposed across a load, said device comprising:
- input terminals for receiving the input signal;
- output terminals for imposing said DC output signal across the load;
- first and second switching means connected in series, said serially connected first and second switching means connected in parallel across said input terminals, each of said first and second switching means including in parallel a transistor switching means, a diode means and a capacitor means;
- transformer means having a primary winding, and serially connected first and second secondary windings;
- a first rectifying means for connecting said first secondary winding across said output terminals;
- a first resonant capacitor means in parallel with said first rectifying means;
- a second rectifying means for connecting said second secondary winding across said output terminals;
- a second resonant capacitor means in parallel with said second rectifying means;
- means for connecting the primary winding of said transformer to said input terminals and the serial connection between said first and second switching means; and
- a resonant circuit formed from said first and second resonant capacitor means and the total inductance of the primary winding of said transformer.
- 2. The device of claim 1, wherein the capacitance of said first and second capacitor means constitutes the junction capacitance of said first and second transistor means, respectively.
- 3. The device of claim 1, further comprising driving means for driving said first and second transistor switching means at a predetermined frequency.
- 4. The device of claim 1, wherein said first resonant capacitor means comprises the junction capacitance of said first rectifying means and said second resonant capacitor means comprises the junction capacitance of said second rectifying means.
- 5. The device of claim 4, wherein said first and second rectifying means comprise a first diode and a second diode, respectively.
- 6. The device of claim 5, wherein said first resonant capacitor means further comprises a first external capacitor arranged in parallel with said first diode and said second resonant capacitor means further comprises a second external capacitor arranged in parallel with said second diode.
CROSS-REFERENCE TO RELATED APPLICATION
This application is a continuation-in-part of co-pending U.S. patent application Ser. No. 99,965, filed Sept. 23, 1987, and co-pending U.S. patent application Ser. No. 179,926, filed Apr. 11, 1988, entitled "ZERO-VOLTAGE-SWITCHED MULTI-RESONANT CONVERTERS INCLUDING THE BUCK AND FORWARD TYPE", both of which are incorporated herein by reference.
US Referenced Citations (10)
Non-Patent Literature Citations (3)
Entry |
"Secondary Side Resonance For High Frequency Power Conversion", Liu et al, IEEE Applied Power Electronics Conference, 1986, pp. 83-89. |
"Zero-Voltage Switching Technique In DC/DC Converters", Liu et al, IEEE Applied Power Electronics Conference, 1986, pp. 58-70. |
"Zero-Voltage Switching Technique In High Frequency Off Line Converters", Jovanovic et al, IEEE Applied Power Electronics Conference, 1988, pp. 23-32. |
Continuation in Parts (2)
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Number |
Date |
Country |
Parent |
99965 |
Sep 1987 |
|
Parent |
179926 |
Apr 1988 |
|