US 11,594,997 B2 · Method and circuit arrangement for determining an incorrect operating state of an electrical machine

Abstract

The disclosure relates to a method for determining an incorrect operating state of an electrical machine with the aid of an electronic circuit having at least one comparator. The electrical machine is controlled with a pulse width modulation signal. The pulse width modulation signal is demodulated. A first signal, which represents the demodulated pulse width modulation signal, is compared with a second signal. The second signal represents a rotational speed or a rotational angle of the electrical machine and/or a current intensity of the electrical machine. This comparison is carried out with the aid of the at least one comparator. An error signal is generated based on the comparison in order to determine the incorrect operating state of the electrical machine.

Claims13

Dependent claims

A method for determining an incorrect operating state of an electrical machine with aid of an electronic circuit having at least one comparator, the method comprising:

controlling the electrical machine with a pulse width modulation signal;
demodulating the pulse width modulation signal;
comparing, by the at least one comparator, a first signal with a second signal, wherein the first signal represents the demodulated pulse width modulation signal, and wherein the second signal represents a rotational speed or a rotational angle of the electrical machine and/or a current intensity of the electrical machine;
and
generating an error signal based on the comparing;
and
determining the incorrect operating state of the electrical machine based on the error signal.

4 more elements

Dependencies are inferred from the claim text.

Method and circuit arrangement for determining an incorrect operating state of an electrical machine

Life of this patent

Method and circuit arrangement for determining an incorrect operating state of an electrical machine

Life of this patent

Abstract

Claims13