Robert Boschgmbh

Alexander Seufert

Martin Eisenhardt

Klaus Rechberger

Peter Krautwald

Tanja Taupitz

A hybrid cable for electrical drives has at least one signal line, power lines for supplying a drive with electrical power, at least one additional line, an inner electrical shield in which the signal line configured as an electrical line is enclosed, the power line and the at least one additional line being located on a periphery of the inner electrical shield, an outer electrical shield which encloses the power line and the additional line, and at least two shield wires located between the outer shield and the inner shield thereby resulting in improved shielding and mechanical separation between the power lines and the additional lines.

Hybrid cable

The invention concerns a method and an apparatus for field-oriented control of a permanent-magnet-excited synchronous machine. Conversion of an ascertained longitudinal voltage component and an ascertained transverse voltage component into triggering pulses for the synchronous machine is accomplished in a low rotation speed range using a pulse-width-modulated inverter, and in a high rotation speed range using a block switching mechanism or a software program functionally corresponding to a block switching mechanism. The invention reduces output oscillations in the upper rotation speed range that occur in known systems as a result of angular inaccuracies with respect to the target voltage zero transition and the voltage zero transition that is actually implemented.

Method and device for the regulation of permanent-magnet excited synchronous machine having reduced power oscillations in the higher rotational speed range

A method and a device for regulating a polyphase machine, in particular a synchronous machine, in which a direct-axis voltage and a quadrature-axis voltage are determined as manipulated variables of the regulating system, and also including a pulse-width-modulation inverter which generates the phase voltages of the individual phases and is triggered to operate either in PWM mode or in block mode as a function of the operating mode of the electric machine. To simplify the hardware component of the regulating device, PWM control signals and block control signals are generated via software and sent to a PWM/block signal device as a function of the operating mode, the device being capable of generating either PWM signals or block signals as a triggering signal for the pulse-width-modulation inverter as a function of the control signal supplied.

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Hammelburg, Germany

Alexander Seufert