L-3 Communications Magnet-Motor Gmbh

Magnet-Motor Gesellschaft Fuer Mangnetmotorische Technik Mbh

Magnet-Motor Gesellschaft Fuer Magnetmotorische Technik Mbh

Magnet-Motor Gesellschaft Fur Magnetmotorische Technik Mbh

Jens Steffen

Peter Ehrhart

Roland Hagenlocher

Anton Müller

Fritz Walter

Anton Mueller

Harald Tamm

A power electronics unit for driving an electric machine excited by permanent magnets and including a rotor and a stator having at least one stator winding, comprising at least one power switch designed to drive the stator winding, and an overvoltage protection device to protect the power switch from overvoltage. The overvoltage protection device comprises a phase voltage detecting device associated with the power switch as well as a short-circuit switching circuit which, when a predetermined phase voltage threshold value of the phase voltage detected by the phase voltage detection device is reached or exceeded, is adapted to be activated for short-circuiting the stator winding associated with the power switch. The short-circuit switching circuit comprises the power switch designed to drive the stator winding.

Power electronics unit

An electric machine comprises a rotor () equipped with permanent magnets (), and a stator () equipped with electromagnetic poles. The electric machine is characterized in that several adjacent electromagnetic poles respectively constitute an electromagnetic pole group in which the adjacent electromagnetic poles are spaced apart at a first electromagnetic pole spacing, that adjacent electromagnetic poles belonging to different electromagnetic pole groups are spaced apart at an electromagnetic pole spacing greater than said first electromagnetic pole spacing, that each electromagnetic pole group has an even number of electromagnetic poles, and that adjacent electromagnetic poles of an electromagnetic pole group are linked to each other so as to generate magnetic fields of opposite direction in operation.

Electric machine with different stator pole spacings

A drive system (DS) for a land craft comprises a machine system (M, M) for driving the land craft, the machine system comprising at least a first and a second electric machine (M, M) acting on a common drive shaft (S) for driving the land craft, and a control device (PE, PE, PE) which is adapted to control the machine system for operating in at least two rotating speed operation ranges (OR, OR) with different rotating speeds of the drive shaft (S). The first electric machine (MI) is controlled to operate in both rotating speed operation ranges (OR, OR) to provide a first drive torque, and the second electric machine (M) is controlled to operate in only one of the rotating speed operation ranges (OR) to provide a second drive torque in addition to the first drive torque.

Drive system for a land craft

An electric drive unit for a motor vehicle, comprising:

Cooled electric drive unit for a motor vehicle

An electric drive unit for a motor vehicle comprises an electric motor having a motor housing, a stator mounted in the motor housing and having coil-wound poles, a rotor arranged internally of the stator with an air gap present between the stator and the rotor, and a planetary gear system having a sun wheel, a planet carrier, planet wheels and a ring gear. The planet wheels have a maximum diameter and axial positioning that an imaginary common envelope cylinder for all maximum diameters of the planet wheels is located radially inside of the winding heads present on one axial side of the stator and axially beside the portion of the rotor adjoining the air gap and that the planet wheels project in axial direction outwardly beyond said winding heads either not at all or with less than 50% of their tooth width in engagement with the sun wheel.

Growing community of inventors

Pürgen, Germany

Jens Steffen