Abstract: A multi-axes industrial processing machine with a multi-axes electrical drive system and at least two axle drives that have each an axle module and a built-in motor is disclosed. The machine further includes an impedance that is transformer-coupled with a supply module through an annular core. Either the phase lines on the AC side of the supply module or the output lines of the DC side of the supply module as well as an additional winding are wound on the annular core. The impedance is connected in parallel to the additional winding.

Abstract: An induction apparatus includes a winding arrangement having a winding start and a winding end for inducing a magnetic field in a magnetizable core; and a lossy, magnetizable device through which and/or about which the winding start and the winding end of the winding arrangement is so disposed as to induce a magnetic flux in the magnetizable device. This arrangement prevents an electric breakdown at the star point of winding strands of synchronous motors.

Abstract: A multi-axes industrial processing machine with a multi-axes electrical drive system and at least two axle drives that have each an axle module and a built-in motor is disclosed. The machine further includes an impedance that is transformer-coupled with a supply module through an annular core. Either the phase lines on the AC side of the supply module or the output lines of the DC side of the supply module as well as an additional winding are wound on the annular core. The impedance is connected in parallel to the additional winding.

Abstract: A method for reduction of natural system oscillations in an electric motor which is operated using a converter with a voltage intermediate circuit, by periodically decoupling the voltage intermediate circuit (UZK) from the supply mains system (N) at times which are synchronized to triggering equipment for the input converter (E), in particular for as long as current is flowing through the mains system input inductor (LK).

Abstract: A system and method for damping of resonant peaks in an electric motor which is operated using a converter with an intermediate voltage circuit, by means of a matched impedance to ground at the motor star point, and a corresponding electric motor is disclosed. In a converter system having an intermediate voltage circuit which operates with a mains system input inductor in the step-up converter mode or has other input-side inductances, there is a risk of natural system oscillations being formed via discharge capacitances in conjunction with motors. If the motor now has an amplitude/frequency response with a pronounced resonant frequency in the region of such natural system oscillations, then there is a risk of higher voltages occurring at the motor star point than in the motor phases.

Abstract: In a converter system having an intermediate voltage circuit which operates with a supply network-side input inductor in the step-converter mode or has other input-side inductances, there is a risk of natural system oscillations being formed via discharge capacitances in conjunction with motors. If the motor now has an amplitude/frequency response with a pronounced resonant frequency in the region of such natural system oscillations, then there is a risk of higher voltages occurring at the motor star point (S) than in the motor phases (I, V, W). This is prevented by the present invention by introducing an impedance (Z), in particular at the input to the motor, in order to damp capacitive discharge currents to ground potential, which are caused by system oscillations (fsys) (excited asymmetrically with respect to ground in the motor phases (U, V, W)) of the converter system (LK, UR, LT, M) in the winding sections.

Abstract: An induction apparatus includes a winding arrangement having a winding start and a winding end for inducing a magnetic field in a magnetizable core; and a lossy, magnetizable device through which and/or about which the winding start and the winding end of the winding arrangement is so disposed as to induce a magnetic flux in the magnetizable device. This arrangement prevents an electric breakdown at the star point of winding strands of synchronous motors.

Abstract: The invention relates to a frequency converter system having a filter, an input-side inductance, in particular a mains system input inductor, and a converter with an input converter and an inverter for operation of an electrical machine, having a tuned circuit which is formed by at least one input-side inductance and parasitic distributed capacitances in the frequency converter system with undesirable resonant oscillations during operation of the frequency converter system, with a damping device being provided for damping the tuned circuit.

Abstract: In a converter system having a voltage intermediate circuit which operates with a mains system input inductor in the step-up controller mode or has other input-side inductances, there is a risk of natural system oscillations being formed via discharge capacitances in conjunction with motors. If the motor now has an amplitude/frequency response with a pronounced resonant frequency in the region of such natural system oscillations, then there is a risk of higher voltages occurring at the motor star point (S) than on the motor phases (U, V, W). This is prevented by the invention in that materials, particularly capacitive elements such as lossy dielectrics or inductive elements which produce eddy current losses are used for the stator in the motor, such that these materials result in increased losses being produced in the region of system oscillations (fsys), which are stimulated asymmetrically with respect to ground potential, in the converter system (Lk, UR, L, M).

Abstract: The invention relates to a frequency converter system having a filter, an input-side inductance, in particular a supply network-side (or input) inductor, and a converter having an input converter and an inverter for supplying an electrical machine. The frequency converter constitutes a tuned circuit formed by at least one input-side inductance and parasitic distributed capacitances in the frequency converter system, with undesirable resonant oscillations encountered during operation of the frequency converter system, with a damping device being provided for damping the tuned circuit.

Abstract: A system and method for damping of resonant peaks in an electric motor which is operated using a converter with an intermediate voltage circuit, by means of a matched impedance to ground at the motor star point, and a corresponding electric motor is disclosed. In a converter system having an intermediate voltage circuit which operates with a mains system input inductor in the step-up converter mode or has other input-side inductances, there is a risk of natural system oscillations being formed via discharge capacitances in conjunction with motors. If the motor now has an amplitude/frequency response with a pronounced resonant frequency in the region of such natural system oscillations, then there is a risk of higher voltages occurring at the motor star point than in the motor phases.

Abstract: In a converter system having an intermediate voltage circuit which operates with a supply network-side input inductor in the step-converter mode or has other input-side inductances, there is a risk of natural system oscillations being formed via discharge capacitances in conjunction with motors. If the motor now has an amplitude/frequency response with a pronounced resonant frequency in the region of such natural system oscillations, then there is a risk of higher voltages occurring at the motor star point (S) than in the motor phases (I, V, W). This is prevented by the present invention by introducing an impedance (Z), in particular at the input to the motor, in order to damp capacitive discharge currents to ground potential, which are caused by system oscillations (fsys) (excited asymmetrically with respect to ground in the motor phases (U, V, W)) of the converter system (LK, UR, LT, M) in the winding sections.

Abstract: Reduction of natural system oscillations in an electric motor which is operated using a converter with a voltage intermediate circuit, by periodically decoupling the intermediate circuit from the mains system, and corresponding voltage intermediate-circuit converters. In a converter system having a voltage intermediate circuit, which operates with a mains system input inductor in the step-up controller mode or has some other input-side inductances, there is a risk of natural system oscillations being formed in conjunction with motors, via discharge capacitances. This is prevented by the present invention by periodically decoupling the voltage intermediate circuit (UZK) from the supply mains system (N) at times which are synchronized to triggering equipment for the input converter (E), in particular for as long as current is flowing through the mains system input inductor (LK).

Abstract: A primary switched-mode power supply unit having an auxiliary power supply for a control unit controlling a primary power circuit breaker connected in series with a first primary winding and a primary voltage regular connected to the control unit. The auxiliary power supply has a secondary primary winding across which a series circuit of a diode and a capacitor is connected. A current limiting circuit breaker is connected between the auxiliary voltage input of the control unit and a ground, the actuating input of said current limiting circuit breaker being connected to an output of an overcurrent controller.

Abstract: The invention concerns a primary switched-mode power supply device with several electrically isolated secondary circuits, the output voltage of the secondary circuit being connected to an actual-value sensor with a regulator connected to the sensor output, with the output voltage being protected by a fuse connected in series with the filter capacitor. In accordance with the invention, the junction point of the filter capacitor and the fuse is connectable by an electrically controlled switch to the output terminal of the actual-value sensor as soon as the switch is turned on after the fuse has been tripped. Thus, a simple embodiment of an over-voltage protection is obtained for a primary switched-mode power supply unit with several electrically isolated secondary circuits, without additional monitoring of an in-phase output voltages A.sub.2 and A.sub.3 and a controlled secondary circuit being controlled in case of a fault to an output voltage that is lower than the normal operating controlled output voltage A.