| 摘要 |
A power electronics chassis (10) for electric vehicles and other applications that use liquid coolant to cool power electronic devices (20) contained within the chassis. The chassis (10) includes an electrically conductive housing (12) and an electrically non-conductive manifold (16) that permits coolant flow into and out of the housing. The housing (12) has at least one wall (34) that includes an outer surface (42) and a pair of recessed apertures (36,72), each of which provide access to an interior region (38) of the housing (12) via a passageway (40,74). The manifold (16) has an inlet (26) and an outlet (28), each of which has a connecting tube (54,80) that extends through one of the passageways (40,74). Each passageway (40,74) is defined by an axial wall (44,78) of the housing (12) that extends towards the interior region (38) from the outer surface (42) to its respective aperture. The apertures (36,72) are each formed by an annular wall (50,76) that extends radially inward from its associated axial wall (44,78) at the interior end of its passageway. The outer diameter of the connecting tubes (54,80) are equal to the diameter of their respective apertures (36,72). Thus, each tube (54,80) is in contact with its aperture (36,72) and is separated from its adjacent axial wall (44,78) by an annular gap (70). This configuration provides electrical isolation of the coolant from the chassis (10) in a manner that significantly reduces the radiated emissions at the apertures (36,72).
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