Method for operating an electric machine

A method for checking an operation of an electric machine, which has three phases, comprising:

• for pulses of a first electric variable of the three phases, a pulse width modulation is carried out, wherein, depending in each case on a positioning of electromechanical components of the electric machine with respect to one another, a first electric variable has a pulse with a longest pulse width for a first of the three phases, a pulse with an intermediate pulse width for a second of the three phases, and a pulse with a shortest pulse width for a third of the three phases, wherein a cycle of the pulse width modulation is delimited by two points in time, including, a point in time at the beginning of the cycle and a point in time at the end of the cycle, wherein a first pulse of the three phases is shifted with respect to a first of the two points in time that delimit the cycle and a second pulse of the three phases is shifted with respect to a second of the two points in time that delimit the cycle, wherein at least one value of a second electric variable is measured during the cycle within at least one measurement window.

A system for checking an operation of an electric machine, which has three phases,

• comprising a microcontroller and at least one sensor, wherein the microcontroller is designed such that, for pulses of a first electric variable of the three phases, a pulse width modulation is carried out, wherein, depending on a positioning of electromechanical components of the electric machine with respect to one another in each case, the first electric variable has a pulse with a longest pulse width for a first of the three phases, a pulse with an intermediate pulse width for a second of the three phases, and a pulse with a shortest pulse width for a third of the three phases, wherein a cycle of the pulse width modulation is delimited by two points in time, including a point in time at the beginning and a point in time at the end of the cycle, wherein the microcontroller is designed such that a first pulse of the three phases is shifted with respect to a first of the two points in time that delimit the cycle, and a second pulse of the three phases is shifted with respect to a second of the two points in time that delimit the cycle, wherein the at least one sensor is designed such that at least one value of a second electric variable is measured during the cycle within at least one measurement window.