Abstract: An elastic coupling, in particular an elastic shaft coupling, includes a metallic outer part, a metallic inner part and elastic buffers arranged so as to be spaced apart between the outer part and the inner part. The outer part includes radially inwardly projecting elevations which define buffer contact surfaces and the inner part includes radially outwardly projecting elevations which define buffer contact surfaces. In order for the elastic coupling to allow for gentler startup and an operating behaviour optimized in terms of rotary oscillation in comparison with conventional couplings of this type. The elastic buffers are arranged in at least two groups which are radially spaced apart. At least one annular intermediate part is arranged between the adjacent buffer groups and is connected torsionally to both the outer part and to the inner part via the elastic buffers.

Abstract: The voltage of the intermediate circuit of a frequency converter is monitored, while the intermediate circuit is charged via charging resistors. When the voltage has not reached at least a reference voltage during a specific time constant, the charging process is interrupted prematurely. The reference voltage is selected to be considerably lower than the operating voltage of the intermediate circuit. The reference voltage may be less than half of the operating voltage of the intermediate circuit.

Abstract: The voltage of the intermediate circuit of a frequency converter is monitored, while the intermediate circuit is charged via charging resistors. When the voltage has not reached at least a reference voltage during a specific time constant, the charging process is interrupted prematurely. The reference voltage is selected to be considerably lower than the operating voltage of the intermediate circuit. The reference voltage may be less than half of the operating voltage of the intermediate circuit.

Abstract: An evaluation device with an absolute value counter is provided in an incremental position measuring system, which determines the absolute position even in case of loss of the main power supply. The evaluation device is operated by means of an emergency power supply while the main power supply is out. Following the restoration of the main power supply, counting pulses are supplied to a follow-up counter (11) by a pulse emitter, until the follow-up counter has reached the counter reading of the absolute value counter. Two rectangular signals, which are phase-shifted by 90.degree. in relation to each other, are formed as a function of the counting signals, which are present at the evaluation device in the form of output signals.