| Abstract |
Interior Permanent Magnet Synchronous Motors
(IPMSM) gain importance due to their high torque per
volume ratio particularly for hybrid electrical vehicles.
However, unlike to standard control theory, the torque
control strategy for these motors is not apparently due to
their reluctance torque, which is typical with interior
magnet design. In this contribution, a control strategy is
presented, which enables optimal torque control both in the
lower speed range as well in the full flux weakening range.
Operation during flux weakening, however, causes stress to
the magnets of the motor with the risk of permanent
demagnetization. The relations between the crucial design
parameters are shown. |
