METHOD FOR DETERMINING A MAXIMALLY ADJUSTABLE TORQUE OF AN ELECTRIC MACHINE

The invention relates to a method for determining a maximally adjustable torque (Mmin, Mmax) of an electric machine in motor and/or generator mode for a present operating point, wherein: a presently maximally adjustable voltage (Udc) and a present angular frequency (ωel) of the electric machine are determined; parameters (P) of the electric machine are iteratively determined using a maximally permitted excitation current (lex,max) for the electric machine, and variables comprising a maximally possible q-current (Iq,min, Iq,max) and a maximally possible d-current (Id.min, Id,max), in each case for the motor and/or generator mode, are determined from said parameters using a maximally permitted phase current (Idq.Limit) and a maximally permitted total current (Idc.Limit) for the motor mode and/or the generator mode; a maximally possible torque (Mmin, Mmax) of the electric machine for the motor mode and/or generator mode is determined from the variables; and a determined value for the maximally possible torque for the motor mode and/or generator mode is provided via an interface.