Abstract: The invention relates to the programming of a motor controller by means of a configuration file which is sent to the motor controller. The configuration file is typically sent from a PC, but with this invention it is now possible to generate and to download the file directly to the motor controller from an Internet server. The Internet server is provided by the manufacturer of the motor controller and contains an interactive programming software, a motor controller database, a compiler and a transmitter unit. The invention makes up-dating and maintenance of the motor controller software quicker and easier as known so far.

Abstract: The invention is directed to controlling an electric motor by means of a frequency converter. The frequency converter can be connected to one of several different mains voltages. According to the present invention, the maximum output power of the frequency converter, is limited when the actual mains voltage is lower than the maximum nominal mains voltage, for which the frequency converter is designed, and during the limitation the frequency converter controls the speed of the motor within a power range up to a limited maximum output power. This gives a genuine multi-voltage unit, which can be connected to a wide range of mains voltages.

Abstract: The invention is directed to controlling an electric motor by means of a frequency converter. The frequency converter can be connected to one of several different mains voltages. According to the present invention, the maximum output power of the frequency converter, is limited when the actual mains voltage is lower than the maximum nominal mains voltage, for which the frequency converter is designed, and during the limitation the frequency converter controls the speed of the motor within a power range up to a limited maximum output power. This gives a genuine multi-voltage unit, which can be connected to a wide range of mains voltages.

Abstract: The invention relates to the programming of a motor controller by means of a configuration file which is sent to the motor controller. The configuration file is typically sent from a PC, but with this invention it is now possible to generate and to download the file directly to the motor controller from an Internet server. The Internet server is provided by the manufacturer of the motor controller and contains an interactive programming software, a motor controller database, a compiler and a transmitter unit. The invention makes up-dating and maintenance of the motor controller software quicker and easier as known so far.

Abstract: The invention relates to a step drive assembly which includes a rotatable operating unit for operating a tool or knife or the like. The assembly has a change-over clutch for selectively connecting the operating unit to a continuously running motor or a brake. Control apparatus for the assembly includes a disk rotatable with the operating unit having teeth and spaces therebetween forming zones and a sensor unit for scanning the zones and outputting a pulse train. An evaluating circuit responsive to the pulse train outputs a positioned stop signal and an overload stop signal to effect a braking operation.

Abstract: A method and apparatus for operating a switching device such as a clutch or brake for a moveable element such as a shaft which is driveable by a prime mover such as a rack and pinion device. The clutch selectively connects the shaft to the prime mover and the brake alternately and selectively connects the shaft to the housing. A motor sinusoidally reciprocates the rack by way of an eccentric drive and the rack drives a pinion on the input side of a pneumatic clutch and brake unit. The clutch is always operated in only one direction of movement and the moveable shaft can thereby be intermittently driven in one direction. A continuously rotating motor shaft carries a signal generator disc having a signal generating track in the form of recesses which are scanned photoelectrically. An operating signal which holds the clutch engaged during one half period is received by the signal generator and delivered by a control device.

Abstract: An incremental digital converter for converting two phase displaced signals of a pulse generator, which signals represent the position and direction of an object moved in two opposite directions, to a parameter which represents the position digitally. The converter includes a reversible position counter and a signal generator which derives from the phase displaced signals a direction signal for determining the counting direction of the counter and timing pulses to be counted by the counter.