Voith Turbo Gmbh Co. Kg

Kaltenbach & Voigt Gmbh & Co.

Kaltenbach + Voigt Gmbh

Richard Bürk

Bernd Dietzel

Johannes Sauter

Thomas Bischof

Uli Stark

A method and device for determining the motor moment constant kof an electric motor by measuring motor parameters on the running motor. For reduction of the previously considerable measuring effort it is proposed that firstly the generator voltage Uproduced by the motor is measured, and in that the motor moment constant kis calculated by division of the generator voltage Uand the speed of rotation fof the motor, taking into consideration at least one further constant. The method and the device are suitable for DC motors and for 3-phase synchronous motors.

Method and device for determining the motor constant of an electric motor

A system for driving an electric handpiece in response to a pneumatic control signal may provide for fast interchange of handpieces, self-calibration and wide dynamic range of operation with precise speed control. The system may be incorporated into virtually any dental treatment center using traditional pneumatic drive handpieces, and a conversion kit may facilitate such conversion. The system may provide not only for controlling the speed and torque of a tool coupled to an electric drive handpiece responsive to a pneumatic control signal, it may also provide for coupling cooling air and treatment media, such as air and/or water to the handpiece. Coupling of a handpiece to an operating base of the system, including coupling of media lines and electrical connections may be made with a simple press and twist action using quick connection structure.

Dental treatment center

The invention relates to a device for the determination of the inclination of the roadway in a vehicle, with an arrangement (), for at least the indirect determination of parameters, which at least indirectly characterize the inclination of the roadway. Said arrangement (), for the at least indirect determination of parameters which at least indirectly characterize the inclination of the roadway, forms a construction unit () with a device () which may be operated by the driver for setting a driver command which alters or sets the driving state of a gearbox unit.

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Alberweiler, Germany

Richard Bürk