Abstract: The invention relates to a voltage transformer (1) for transformation between a direct voltage at a direct voltage gate (2) and a single-phase or multi-phase alternating voltage at an alternating voltage gate (3) by temporal clocking of an electronic switching unit (4), via which each phase (3a-3c) of the alternating voltage gate (3) can be connected either to the positive pole or to the negative pole of the direct voltage gate (2), wherein the positive pole and/or the negative pole of the direct voltage gate (2) is connected via at least one capacitor (5, 5a, 5b) to a ground connection (7), wherein the ground connection (7) can be connected to an external ground (7a), and wherein the connection between the capacitor (5, 5a, 5b) and the ground connection (7) is guided via at least one switch element (6, 6a, 6b). The invention also relates to an electric powertrain (10) for a motor vehicle (100). The invention further relates to a motor vehicle (100) having the electric powertrain (10).

Abstract: A method for discharging a high-voltage system in a vehicle, the high-voltage system having at least one energy store and a plurality of high-voltage consumers. To discharge the high-voltage system, the electrical energy store is first separated from the rest of the vehicle electrical system, and at least one of the high-voltage consumers is switched on, so that the charge stored within the system drains via the consumers.

Abstract: Methods and associated devices are described for discharging the high-voltage network, particularly a DC voltage intermediate circuit, in which for discharging the capacitors of the high-voltage network, switching devices are used that lie between the capacitors and at least one precharging resistor and a high-voltage battery, and the switching devices are switches having a specifiable positioning of the switching contacts or switching units or relays or contactors, which are switchable with the aid of a control device. The operation of the switching units takes place in such a way that the at least one precharging resistor is used simultaneously for charging and discharging the DC voltage intermediate circuit.

Abstract: The invention relates to a method for discharging a high voltage network (2) in a vehicle, the high voltage network (2) comprising at least one energy store (1) and a plurality of high voltage consumers (3). For discharging the high voltage network (2), the electrical energy store (1) is first separated from the remaining on-board power supply system (2) and at least one of the high voltage consumers (3) is switched on so that the charge stored in the network is discharged via the consumers (3).

Abstract: Methods and associated devices are described for discharging the high-voltage network, particularly a DC voltage intermediate circuit, in which for discharging the capacitors of the high-voltage network, switching devices are used that lie between the capacitors and at least one precharging resistor and a high-voltage battery, and the switching devices are switches having a specifiable positioning of the switching contacts or switching units or relays or contactors, which are switchable with the aid of a control device. The operation of the switching units takes place in such a way that the at least one precharging resistor is used simultaneously for charging and discharging the DC voltage intermediate circuit.

Abstract: A pulse-width rectifier for operating an electric machine in motor operating mode or in generator operating mode, includes a terminal for a control device that communicates with the pulse-width rectifier via a data connection. In order to safeguard the supply of energy in the case of a disturbance in the data transmission between the control device and the pulse-width rectifier, the pulse-width rectifier is constructed such that it automatically switches into an emergency generator operating mode in which it produces at its direct-voltage output a prespecified power with which it is possible to maintain at least an emergency operation of electrical consumers.

Abstract: A monitoring device for monitoring a terminal of a terminal component in a power supply system is described, the terminal component being connectable to the power supply system and to a monitoring system via an electrical connection element, and the monitoring device comprising a voltage measuring device for detecting a voltage value of a voltage between a first terminal and a second terminal of the electrical connection element, the first terminal and the second terminal being connectable to the monitoring system, and an evaluation device for evaluating the voltage value, the evaluation device being designed to generate an indicating signal, which indicates a faulty connection to the power supply system if the voltage value differs from a predetermined voltage value.

Abstract: A pulse-width rectifier for operating an electric machine in motor operating mode or in generator operating mode, includes a terminal for a control device that communicates with the pulse-width rectifier via a data connection. In order to safeguard the supply of energy in the case of a disturbance in the data transmission between the control device and the pulse-width rectifier, the pulse-width rectifier is constructed such that it automatically switches into an emergency generator operating mode in which it produces at its direct-voltage output a prespecified power with which it is possible to maintain at least an emergency operation of electrical consumers.

Abstract: An apparatus for holding a bow in a position to be used with minimal movement required by the user. The apparatus comprises an elongated rod being formed of a predetermined material and consisting of at least one section. A connection member is engageable with a first end of the elongated rod for securing the elongated rod to a tree. The apparatus includes a hook like member and a means disposed at a second end of said elongated rod for enabling said hook like member to be rotatably engaged therein with a second end of said elongated rod.

Abstract: A method for simulating control functions of a control device, in which a control program code for execution of control functions is stored in a first memory area of a memory belonging to the control device, the control program code including one or more control program code modules for the control functions, and containing at least one switching device for switching over from a control program code module SPCM to a simulation program code module. At least one simulation program code module for one or more test control functions is made available in a second memory area of the memory. The switching devices switch over from the control program code module to a pertinent simulation program code module stored in the second memory area. The control program code is then processed, the simulation program code module being executed, via the switched-over switching device, instead of the control program code module.

Abstract: In a method for controlling the frequency of a traveling wave motor, in which an actual value proportional to the actual frequency of the excitation alternating voltage of the traveling wave motor (10) is obtained from the amplitude of an alternating voltage (sense voltage) tapped from the amplitude of a stator (11) of the traveling wave motor (10). The actual value is compared with the desired frequency of the proportional desired value and the excitation frequency is corrected with the deviation which was subjected to suitable control algorithm. In order to stop the traveling wave motor (10) at a stable operating point at maximal performance, the desired value is derived from the amplitude modulation of the sense voltage. This desired value is obtained in a superimposed control loop in which the sense voltage is demodulated, rectified and compared with a predetermined desired amplitude modulation value.