Abstract
Direct torque control (DTC) is used widely recently. It is intuitive and clear,
simple and swift and has fast torque respond. on the other hand, permanent
magnet synchronous machine (PMSM) become more and more important for its
high reliability and simple structure. In this paper, we focused on the effect of
the application of DTC to PMSM. In order to analyze PMSM DTC better, this
paper precented both the advantage and the disavantage of DTC .What’s
more,it also shown PMSM’s classification, structure, mathematical models in
different coordinate system . Then I built model of PMSM DTC and smulated in
the simulink environment. In the end I drew a conclusion by the result of
simulation. The conclusion shown that PMSM DTC has quick torque respond to
achieve rapid and reliable control. however, it has poor low-speed
performance. Therefore, improving PMSM DTC low-speed performance will be
the trend of improvement in the future.
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