Resonant power converter
Assignee3D Plus
InventorCédric Colonna
Life of this patent
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Abstract
A power converter having a parallel resonant circuit, includes an inverter, a resonant circuit, a transformer comprising a primary circuit and a secondary circuit, control means for the inverter, the inverter being connected to the resonant circuit, which is intended to be connected to an output load via the transformer, the power converter wherein the inverter comprises a first half-bridge and a second half-bridge in parallel with the first half-bridge, a first inductor between the first half-bridge and the resonant circuit, a second inductor between the second half-bridge and the resonant circuit, and in that the first and second inductors have the same inductance and are coupled in the opposite direction to one another.
Claims6
A power converter having a parallel resonant circuit, comprising:
- an inverter,
- a resonant circuit (LC),
- a transformer (T1) comprising a primary circuit and a secondary circuit,
- control means for the inverter, the inverter being connected to the resonant circuit (LC), which is intended to be connected to an output load (Rout) via the transformer (T1),
- wherein the power converter comprises an inductor (Lm) in parallel with the transformer (T1) and in that the inverter comprises:
- a first half-bridge (D1) and a second half-bridge (D2) in parallel with the first half-bridge (D1),
- a first inductor (Lc1) between the first half-bridge (D1) and the resonant circuit (LC), a second inductor (Lc2) between the second half-bridge (D2) and the resonant circuit (LC), and in that the first and second inductors (Lc1, Lc2) have the same inductance and are coupled in the opposite direction to one another, wherein the second half-bridge (D2) is in phase opposition with the first half-bridge (D1) for operation under low load and wherein a current lc flowing through the first and second inductors (Lc1, Lc2) is such that:
- l
-
- c
- =
- V
- i
-
- n
- 8
-
- L
- C
-
- f
- d
-
- e
-
- c
- where Vin is the input voltage at the terminals of the first half-bridge (D1) and the second half-bridge (D2), Lc is the inductance of the first and second inductors (Lc1, Lc2) and fdec is a chopping frequency of the resonant circuit (LC), for operation under low load.
Dependencies are inferred from the claim text.