Vacon Oyj

Abb Control Oy

Matti Pussinen

Osmo Miettinen

Harri Mattlar

The invention relates to a liquid cooling element for cooling heat generating elements of frequency converters, in particular, and an arrangement for connecting the liquid cooling element. The liquid cooling elementis provided with two channel systems: horizontal channelsand transverse channelsconnecting said horizontal channels. The liquid cooling elementis characterized by consisting of one integral piece, the transverse channelsbeing arranged eccentrically to the horizontal channelssuch that the longitudinal axis of the transverse channelis closer to the lateral face of the cooling element than the longitudinal axis of the horizontal channeland the outer edge of the transverse channelextends closer to the lateral face of the cooling element than the outer edge of the horizontal channel. The liquid cooling element is connected to protect the liquid cooling against leakage such that around the pipes supplying cooling liquid into the horizontal channels there is arranged a second pipehaving a larger diameter.

Liquid cooling element and connection arrangement of liquid cooling element

The invention relates to a fastening device for fastening a toroidal choking coil () to a base or the like, the toroidal choking coil comprising an inner circumference defined by a surface parallel with an axis of rotation of the toroidal choking coil and located closest to the axis of rotation. The toroidal choking coil further comprises an outer circumference defined by a surface parallel with the axis of rotation of the toroidal choking coil and located outermost from the axis of rotation, and side surfaces defined by surfaces perpendicular to the axis of rotation of the toroidal choking coil and connecting the inner circumference and the outer circumference. The fastening device for a toroidal choking coil of the invention comprises at least one pair of choking coil fasteners () consisting of a first choking coil fastener () and a second choking coil fastener (), arranged to be installed on opposite side surfaces of the toroidal choking coil (), and that at least one choking coil fastener () is arranged to come at least partly into contact with the outer circumference of the toroidal choking coil () and at least one choking coil fastener () is arranged to come at least partly into contact with the inner circumference of the toroidal choking coil ().

Fastening device

The invention relates to a fastening device for a toroidal choking coil for fastening a toroidal coil () to an electric device or a corresponding supporting base (), the toroidal choking coil comprising an inner circumference defined by a surface parallel with an axis of rotation of the toroidal choking coil () and located closest to the axis of rotation, an outer circumference defined by a surface parallel with the axis of rotation of the toroidal choking coil () and located outermost from the axis of rotation, and side surfaces defined by surfaces perpendicular to the axis of rotation of the toroidal choking coil () and connecting the inner circumference and the outer circumference. The fastening device for a toroidal choking coil of the invention comprises a choking coil base () provided with fastening elements () for fastening the choking coil base to its base, and at least one choking coil collar () for fastening the toroidal choking coil () to the choking coil base (), the choking coil collar () being arranged to come into contact with the outer circumference of the toroidal choking coil and the choking coil collar () being arranged to be fastened to the choking coil base () by suitable fastening elements ().

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Laihia, Finland

Matti Pussinen