Method and device for determining nominal current values for generating a desired nominal motor torque on a permanent magnet-excited electric motor

摘要

The invention relates to a method for determining current setpoints (Iqsoll, Idsoll) for generating a desired motor setpoint torque (Msoll) on a permanent magnet-excited electric motor, a current operating point (3) and the desired motor setpoint torque (Msoll) being obtained by means of a control device (2), Depending on the operating point, a coefficient (Kpm) for a permanent flux torque component is determined, by means of the specific coefficient (Kpm) from the desired motor target torque (Msoll) a permanent flux torque (Mpm) and a reluctance torque (Mreluctance) can be determined, starting from the determined permanent flux torque (Mpm) a torque-generating one Current setpoint (Iqsoll) is determined, based on the certain reluctance torque (Mreluctance) a magnetic field-weakening current setpoint (Idsoll) is determined, and the certain current setpoints (Iqsoll, Idsoll) are provided for regulation. The invention also relates to an associated device (1).