Abstract: An electric braking device for printing material processing machines includes at least one electric drive to be braked that is supplied by a power converter in motor operation and is braked by the power converter in generator operation. A control unit switches on a redundant electric braking device in the case of a failure of the power converter by using a switch. The braking device has at least two braking stages, an additional switch for actuation in at least two stages, and at least one brake resistor. In the circuit of the redundant electric braking device, a braking current is measured and the measured value is fed to a comparator for comparing the actual braking current to a desired braking current. A printing press having the braking device is also provided.

Abstract: A method for delivering electric power to power consumers of a printing technology machine, which permits high availability of the machine with low idling losses, includes taking start-up time periods of the power consumers into account when switching over the power delivery to power consumers of a printing machine.

Abstract: An electrical voltage supply device for machines processing printing material includes at least one drive motor for the transport of printing material and at least one further electrical consumer. A control unit is provided which, when the supply voltage drops below a minimum acceptable supply voltage of the machine processing printing material, switches of electrical consumers which are not required for the transport of printing material and supplies the drive motor for the transport of printing material from energy stored in the moving masses of the machine processing printing material.

Abstract: A device for controlling electric drives in machinery includes an electronic control unit for calculating in advance the electric power required by the at least one electric drive as a function of motion profiles of the electric drive. A printing material processing machine having the drive, is also provided.

Abstract: An electric braking device for printing material processing machines includes at least one electric drive to be braked that is supplied by a power converter in motor operation and is braked by the power converter in generator operation. A control unit switches on a redundant electric braking device in the case of a failure of the power converter by using a switch. The braking device has at least two braking stages, an additional switch for actuation in at least two stages, and at least one brake resistor. In the circuit of the redundant electric braking device, a braking current is measured and the measured value is fed to a comparator for comparing the actual braking current to a desired braking current. A printing press having the braking device is also provided.

Abstract: A method and device for electrically braking an electric drive in a machine for processing printing material, includes a power electronics connected between the electric drive and a DC voltage intermediate circuit. A further electric braking device is switchable between the electric drive and the power electronics. Upon a failure of a power system, a computer initiates a generator-type braking operation through the power electronics. The further electric braking device is switched on upon the failure of the power electronics.

Abstract: An electrical voltage supply device for machines processing printing material includes at least one drive motor for the transport of printing material and at least one further electrical consumer. A control unit is provided which, when the supply voltage drops below a minimum acceptable supply voltage of the machine processing printing material, switches of electrical consumers which are not required for the transport of printing material and supplies the drive motor for the transport of printing material from energy stored in the moving masses of the machine processing printing material.

Abstract: An apparatus and a method for the selection of printing materials in a machine processing printing materials has at least one control computer. The operating data of the machine processing the printing materials is logged by the computer and a tolerance limit corresponding to the operating data registered is stored in the computer. When the tolerance limit is exceeded during a time interval, the printing materials produced in this time interval are registered in the control computer.

Abstract: A device for supplying voltage to an electrical machine, in particular a paper-processing machine, having a plurality of electric drives (11, 12, 21, 22, 32), electric drives (11, 12) of the same supply voltage being combined into one voltage level (14, 23, 33). The voltage supply device is characterized in that provision is made for a first DC voltage level (14) having electric drives (11, 12) as well as an electrical component (1, 13) for dissipating surplus electric energy, and provision is made for at least one second DC voltage level (23) which is connected to the first voltage level (14) via a bidirectional voltage transformer (2) and has further electric drives (21, 22), and one of the voltage levels (14, 23) is connected to the mains supply (4) via a voltage transformer (1).

Abstract: A device for supplying voltage to an electrical machine, in particular a papering processing machine, having a plurality of electric drives (11, 12, 21, 22, 32), electric drives (11, 12) of the same supply voltage being combined into one voltage level (14, 23, 33). The voltage supply device is characterized in that provision is made for a first DC voltage level (14) having electric drives (11, 12) as well as an electrical component (1, 13) for dissipating surplus electric energy, and provision is made for at least one second DC voltage level (23) which is connected to the first voltage level (14) via a bidirectional voltage transformer (2) and has further electric drives (21, 22), and one of the voltage levels (14, 23) is connected to the mains supply (4) via a voltage transformer (1).