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At present, the induction motor is the most popular electric
machinery. There are considerably control technologies have
been developed.This thesis deals with most popular drivers in
the present market and the induction motor for establishing
their mathematical models. Meanwhile , the characteristics of
the drivers also have been simulated in the thesis. From the
studies , we can have a better understanding of the effect of
the driver equipment and choose adequate power electronics. To
avoid disadvantageous effects with respect to the inverter to
damage power electronics as a result of the induction motor
fault, use data provided from the simulation to reduce the
power failure probability or design appropriate protection
devices. To make use of the digital simulation of the voltage
source inverter, including the six-step、 the square wave PWM、
sinusoid wave PWM and optimal PWM , this thesis presents the
analysis of the induction motor under abnormal operation
conditions. In addition, built the vector control mathematical
models and simulate the good dynamics characteristic, including
under- rating speed constant torque operation and over-rating
speed constant power operation of the induction motor. The main
purpose of using software simulation is to reduce the time of
the development of the hardware、save the capital and avoid
waste of money and human resource.
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