T. Senjyu et al., VECTOR CONTROL OF SYNCHRONOUS PERMANENT-MAGNET MOTORS INCLUDING STATOR IRON LOSS, International journal of electronics, 80(2), 1996, pp. 181-190
To achieve high-performance speed control of synchronous permanent mag
net motors (PM motors), the influence of iron loss cannot be neglected
as it depends on the driving frequency in high-speed operation. This
paper presents a voltage equation and the vector control of PM motors
including stator iron loss. The stator iron loss is introduced as an e
quivalent iron loss resistance in voltage equations on the assumption
that the iron loss is produced in equivalent eddy current windings on
the d-q axis. The effect of the stator iron loss can be represented as
equivalent iron loss resistance, which is inserted in series with the
exciting inductance. As the d-q axis flux interferes through the equi
valent iron loss resistance, the electromagnetic torque is affected by
the equivalent iron loss resistance, To achieve vector control, the d
-q axis is decoupled by nonlinear control voltages. As a result, the i
nstantaneous torque control scheme is equal to that of DC machines and
the torque control is simplified. The useful features and validity of
the proposed control method are con firmed by computer simulations.