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This application note describes the design of a 3-phase AC
induction vector control drive with position encoder coupled
to the motor shaft. It is based on Motorola’s DSP56F80x
dedicated motor control device. The software design takes
advantage of the SDK （Software Development Kit）
developed by Motorola.
AC induction motors， which contain a cage， are very popular
in variable speed drives. They are simple， rugged，
inexpensive and available at all power ratings. Progress in the
field of power electronics and microelectronics enables the
application of induction motors for high-performance drives，
where traditionally only DC motors were applied. Thanks to
sophisticated control methods， AC induction drives offer the
same control capabilities as high performance four-quadrant
DC drives.
The drive application concept presented is that of vector
control of the AC induction motor running in a closed-spee
loop with the speed/position sensor coupled to the shaft. The
application serves as an example of AC induction vector
control drive design using a Motorola DSP with SDK
support. It also illustrates the usage of dedicated motor
control libraries that are included in the SDK.
This application note includes a description of Motorola DSP
features， basic AC induction motor theory， system design
concept， hardware implementation and software desig
including the PC master software visualization tool.
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