Arrangement for determining a number of revolutions of a rotatably mounted shaft and method for determining a number of revolutions of a rotatably mounted shaft

摘要

Arrangement for determining a number of revolutions of a rotatably mounted shaft and method for determining a number of revolutions of a rotatably mounted shaft, wherein a permanent magnet is connected to the shaft in a rotationally fixed manner, the signal voltage generated by a microgenerator that is operatively connected to the permanent magnet connected to an energy buffer, in particular via a rectifier a capacitor is supplied, a memory for storing the number of revolutions being supplied from the energy buffer, in particular wherein the signal voltage of the microgenerator is supplied to a counting logic supplied from the energy buffer, which is connected to the memory for reading out the old number of revolutions in each case and for storing the number of revolutions each newly determined number of revolutions, in particular where the memory is long-term stable and / or is designed in FRAM technology, in particular where the permanent magnet is arranged in the sensitive area of the microgenerator, wherein an angle sensor for determining the rotational position, in particular the rotational angle, of the shaft is connected to a computer by means of a signal line, the computer evaluating the voltage applied to the energy buffer, in particular wherein the computer has a means for evaluating the voltage applied to the energy buffer and / or is connected to such a means, in particular via a data exchange connection.