Abstract: An arrangement and methods for operating and for determining the speed of an electrical machine connected to a power electronic switching device and for supplying energy to a control device of the power electronic switching device. The arrangement and methods have an inductive decoupling device arranged on an electrical conductor leading from the switching device to the electrical machine, wherein a frequency determination device is used to determine the frequency of a voltage associated with a current in the electrical conductor and thus indirectly the speed of the electrical machine, and wherein a rectified output voltage of the decoupling device forms a voltage source for the control device.

Abstract: A power semiconductor device comprising a first housing having a cutout with an opening, and a second housing. The device has a load element having external and internal sections, and a feedthrough section pressing through the opening. The feedthrough section has a first outer edge region which tapers laterally towards a first outer edge thereof and a second outer edge region which tapers laterally towards a second outer edge thereof. The first and second outer edge regions face away from one another. The first outer edge is near the lateral first end of the opening and the second outer edge is near the lateral second end of the opening. A first seal is positioned between the first housing and the feedthrough section and a second seal is positioned between the second housing and the feedthrough section. The seals contact one another laterally from the first and second outer edges.

Abstract: An electric machine has in a machine housing, a stator and a rotor which is arranged on a motor shaft which is supported on a non-drive side in a bearing unit which has a ball bearing arrangement and is arranged within the machine housing in a radially elastic and axially displaceable manner. The electric machine is preferably coupled on the drive side without a bearing via a rigid shaft coupling to a work machine, in particular to a hydraulic pump.

Abstract: A power semiconductor device comprising a first housing having a cutout with an opening, and a second housing. The device has a load element having external and internal sections, and a feedthrough section pressing through the opening. The feedthrough section has a first outer edge region which tapers laterally towards a first outer edge thereof and a second outer edge region which tapers laterally towards a second outer edge thereof. The first and second outer edge regions face away from one another. The first outer edge is near the lateral first end of the opening and the second outer edge is near the lateral second end of the opening. A first seal is positioned between the first housing and the feedthrough section and a second seal is positioned between the second housing and the feedthrough section. The seals contact one another laterally from the first and second outer edges.

Abstract: An electric machine, in particular an electric motor, has a one-piece can disposed between a stator and a rotor. The can has a tubular casing, which is loaded with external pressure by a coolant in a machine housing and which is made of fiber composite material. The casing thickness of the can lies between 2.5 mm and 0.5 mm. The can is axially fitted onto a sleeve and the sleeve is mounted to a collar of an end plate of the machine housing. The sleeve has a first axial section projecting into the can and a second axial section aligned with the can.

Abstract: An electric machine has in a machine housing, a stator and a rotor which is arranged on a motor shaft which is supported on a non-drive side in a bearing unit which has a ball bearing arrangement and is arranged within the machine housing in a radially elastic and axially displaceable manner. The electric machine is preferably coupled on the drive side without a bearing via a rigid shaft coupling to a work machine, in particular to a hydraulic pump.

Abstract: An electric machine with a machine housing for accommodating a stator and a rotor with stator and/or rotor windings, which are connected to connecting lines for producing an electrical contact connection. An isolating plate, which covers a line channel for accommodating the connecting lines, has a number of insulating bushes, into which connecting pins are inserted which can be brought into contact with the connecting lines. In this case, the connecting pins with respect to the insulating bushes and preferably the insulating bushes are inserted into the isolating plate in position-coded or angle-coded fashion with respect to the isolating plate.