Resonant converter with multiple conversion circuits
AssigneeGS Yuasa International Ltd.
InventorsKazuto Takagi, Yuki Aoyagi
Life of this patent
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Abstract
m lower conversion circuits configuring an LLC resonant converter that operates by on and off operations of an upper switch element and a lower switch element together with a resonant inductor is included. n upper conversion circuits configuring an LLC resonant converter in which a primary winding and a resonant capacitor operate together with a resonant inductor by the on and off operations of the upper switch element and the lower switch element is included. A lower adjustment inductor connected in parallel with the primary windings of the m lower conversion circuits and an upper adjustment inductor connected in parallel with the primary windings of n lower conversion circuits.
Claims14
A resonant converter comprising:
- an upper switch element and a lower switch element that are connected in series between a positive electrode and a negative electrode of a DC power supply;
- a resonant inductor including one end connected to a connection point between the upper switch element and the lower switch element;
- m, where m is an integer greater than or equal to 2, lower conversion circuits each of which includes a transformer including a primary winding and a secondary winding, a resonant capacitor connected in series to the primary winding, and a rectifier connected to both ends of the secondary winding, the m lower conversion circuits configuring a first LLC resonant converter in which the primary winding and the resonant capacitor are connected between another end of the resonant inductor and the negative electrode of the DC power supply, the first LLC resonant converter operating by on and off operations of the upper switch element and the lower switch element together with the resonant inductor;
- n, where n is an integer greater than or equal to 2, upper conversion circuits each of which includes a transformer, a resonant capacitor, and a rectifier, the n upper conversion circuits configuring a second LLC resonant converter in which a primary winding and the resonant capacitor are connected between the other end of the resonant inductor and the positive electrode of the DC power supply, the second LLC resonant converter operating by the on and off operation of the upper switch element and the lower switch element together with the resonant inductor;
- a lower adjustment inductor connected in parallel with the primary windings of the m lower conversion circuits;
- an upper adjustment inductor connected in parallel with the primary windings of the n upper conversion circuits;
- an intermediate external terminal connected to a connection point between the other end of the resonant inductor and one end of the primary winding of each of the upper conversion circuit and the lower conversion circuit;
- a lower external terminal connected to a connection point between another end of the primary winding of the lower conversion circuit and one end of the resonant capacitor of the lower conversion circuit;
- and
- an upper external terminal connected to a connection point between another end of the primary winding of the upper conversion circuit and one end of the resonant capacitor of the upper conversion circuit,
- wherein the lower adjustment inductor is connected as an external inductor between the intermediate external terminal and the lower external terminal, and the upper adjustment inductor is connected as an external inductor between the intermediate external terminal and the upper external terminal.
Dependencies are inferred from the claim text.