Scania Cv Ab

Itt Manufacturing Enterprises, Inc.

Jörgen Engström

Mikael Bergquist

Stefan Karlsson

Tomas Bartholf

Tanja Heikkilä

Bo Aronsson

The present invention relates to an arrangement for cooling of an electrical machine. The electrical machine comprises a rotor rotatably arranged around a rotation axis, a stator including a stator winding arranged radially outside of the rotor, a housing enclosing the rotor and the stator, at least one drain hole configured to drain a cooling fluid from the housing, at least one spraying device configured to spray cooling fluid on the stator winding and a pump configured to pump cooling fluid to the spraying device. The arrangement comprises a control unit, which is configured, when the electrical machine is in operation, to receive information of the temperature in at least one position of the stator winding and to control the pump such that it pumps a flow rate of the cooling fluid to the spraying device, which is related to the estimated temperature of the stator winding.

Arrangement for cooling of an electrical machine

An electrical connecting device for a machine includes a fitting element () to be fitted in an aperture () of a wall element (), at least one connecting element () which has a first end () with a first connection unit () for an electric cable which is situated outside the wall element (), a second end () with a second connecting element () for an electric cable which is situated within the internal space, and an intermediate portion () to be fitted in an aperture () which runs through the fitting element (); a sealing () makes a tight connection between the connecting element () and the fitting element () in the aperture (). The fitting element () is made integrally from a first material. The connecting element () is made integrally from a second material. The connecting element () and the fitting element () are provided with mutually cooperating surfaces () which define a predetermined fitting position for the connecting element () in the aperture ().

Electrical coupling device for a machine

A propulsion system for a vehicle has output shaft () of a combustion engine (), which is connected to a first component () of a planetary gear so that they rotate at a first speed (n). An input shaft () of a gearbox () is connected to a second component () of the planetary gear so that they rotate at a second speed (n). An electrical machine is connected to a third component () of the planetary gear so that the third component () rotates at a third speed (n). A control unit () estimates in appropriate operating situations a desired speed (n) for the gearbox input shaft (). The unit receives information about the speed (n) of the engine output shaft (). It causes the electrical machine to give the third component () of the planetary gear a speed (n) which in conjunction with the speed (n) of the engine output shaft () results in the gearbox input shaft () assuming the desired speed (n).

Powertrain for a vehicle

The present invention relates to a method for mounting magnet elements on the surface of a rotor for use in a permanent magnet motor. The method comprises the steps of : providing a first tube like element, wherein said first tube like element has an inner diameter that corresponds to an outer diameter of said rotor, providing a second tube like element, wherein said second tube like element has an inner diameter that is larger than an outer diameter of said first tube like element, inserting said first tube like element into said second tube like element, in order to create a hollow space between them, inserting a number of magnet elements into said hollow space, and inserting said rotor into said first tube like element, whereupon said magnet elements are in a tight fit arrangement between said first tube like element and said second tube like element.

Growing community of inventors

Grödinge, Sweden

Jörgen Engström