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US 8,910,372 B2Granted
Method of fabricating a choke assembly
AssigneeRockwell Automation Technologies, Inc.
InventorsJohn R. Brubaker, Lixiang Wei
Life of this patent
Estimating the term…
Abstract
An improved choke assembly for a power electronics device is provided. More specifically, a choke assembly with improved protection from environmental conditions such as dirt and water is provided. An improved choke assembly may include an insulative housing for an inductor coil that seals the inductor coil from the environment.
Claims13
A method for fabricating a motor drive, comprising:
- coupling rectifier circuitry configured to be coupled to an AC power source to inverter circuitry configured to generate drive signals for driving a motor via a DC bus;
- and
- coupling a choke assembly to the DC bus, the choke assembly comprising a bobbin, a preformed inductor coil wound around the bobbin, a preformed insulative container comprising an outer wall, an integral base and a hollow projection extending from the base of the container and creating an internal space between the outer wall of the container and the projection, the bobbin fitting over the hollow projection and the space configured to receive the inductor coil on the bobbin, the projection forming a passageway through the container, an annular cover disposed over the container and configured to seal the inductor coil inside the container, and a magnetic core extending through the hollow projection.
A method for fabricating a motor drive, comprising:
- coupling rectifier circuitry configured to be coupled to an AC power source to inverter circuitry configured to generate drive signals for driving a motor via a DC bus;
- and
- coupling two distinct portions of a choke assembly to the DC bus, each portion comprising a bobbin, a preformed inductor coil wound around the bobbin, a preformed insulative container comprising an outer wall, an integral base and a hollow projection extending from the base of the container and creating an internal space between the outer wall of the container and the projection, the bobbin fitting over the hollow projection and the space configured to receive the inductor coil on the bobbin, the projection forming a passageway through the container, an annular cover disposed over the container and configured to seal the inductor coil inside the container, and a magnetic core extending through the hollow projection.
Dependencies are inferred from the claim text.