Power Factor Correction Circuit for Three-Phase Power Supply
AssigneeThales
InventorsMichel Rincent, Pierre Esposito, Charles Richardeau
Life of this patent
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Abstract
A power-factor correction circuit for a three-phase power supply is provided. The correction circuit comprises a filtering unit at the input receiving the three phases of the current, at least one inductor per phase placed downstream of the filtering unit, a rectifying bridge powering a current-chopping stage, wherein the filtering unit comprises a differential-mode filtering cell comprising at least one inductive circuit formed of a single magnetic material in a double E, each leg of the E being surrounded by a winding. The invention applies notably to the field of power electronics, in particular to the production of three-phase power supply units.
Claims6
A correction circuit of the power factor of a circuit for a three-phase electric network, comprising:
- a filtering unit at the input of said correction circuit receiving the three phases of the current,
- at least one inductor per phase of current placed downstream of the filtering unit, and
- a rectifying bridge powering a current-chopping stage,
- wherein the filtering unit comprises at least one differential-mode filtering cell comprising at least one inductive circuit formed of a single magnetic material in a double E, each leg of the E being surrounded by a winding, the values of the inductors being chosen so that said correction circuit operates at the boundary between the continuous mode and the discontinuous mode.
Dependencies are inferred from the claim text.