Abstract: Provided is an externally excited synchronous machine (ESM) with reduced torque ripple, a rotor designed for the excited synchronous machine, and a method for production of the rotor.

Abstract: A method for operating an electric machine including a rotor and a stator is connected to a first or a second power electronics assembly (PEA), the first or the second PEA including a circuit arrangement that produces a freewheeling condition or an active short circuit condition for a winding of the rotor or the stator, to a DC voltage network having a battery, and the first or the second PEA including an inverter formed by the circuit arrangement. The method includes, in response to a primary fault signal indicating a fault the first or the second PEA, actuating the first or the second PEA to produce the freewheeling condition, and in response to a secondary fault signal indicating a nonreceptiveness of the battery for power fed by the electric machine to the DC voltage network, actuating both the first and the second PEA to produce the active short circuit condition.

Abstract: A bending machine is described, which comprises an upper roller and a lower roller, as well as at least one side roller. The side roller is held in a rocker arm, wherein the first end of which is fixed to a movable supporting member, and the second end of which can be supported in a first position relative to the upper and lower rollers. The rocker arm can be moved to a second position by means of the movable supporting member and fixed there with the second end.

Abstract: A bending machine is described, which comprises an upper roller and a lower roller, as well as at least one side roller. The side roller is held in a rocker arm, wherein the first end of which is fixed to a movable supporting member, and the second end of which can be supported in a first position relative to the upper and lower rollers. The rocker arm can be moved to a second position by means of the movable supporting member and fixed there with the second end.