The DSP is the most commonly used device for such
Applications. The DSPs are highly optimized application-
Specific microprocessors designed to process signals,
Including control signals. With the increasing density and
Complexity of field programmable gate arrays (FPGAs),
Programmable architectures are becoming more attractive
For implementing embedded system designs.
FPGAs are increasingly coming into their own as
a way to achieve Application specific integrated circuits (ASIC) like
Performance-levels with hardware that has off-the-shelf
Convenience similar to traditional DSP processors.
Sophisticated control algorithms become easier to be
Implemented with FPGAs. One of the fundamental
Advantage of FPGA over DSP or other microprocessors is
The freedom of parallelism. Since different parts of FPGA
Can be configured to perform independent functions
Simultaneously, its performance is just not tied to clock
Rate as in DSPs.
The FPGA provides a low cost control for induction motor by many
control strategy Three-phase ac chopper is one of the simplest ways to
Control the speed of induction motor.
AC choppers have been used to control both static and dynamic loads .
Three-phase ac chopper has been used to feed three-phase
Induction motor. Single-phase and three-phase ac
Choppers are showing cost reduction and effective control.
The main problems associated with the ac choppers are
The high harmonic contents in the supply and motor
Currents, very poor power factor especially at light loads,
And low efficiency. Modern PWM techniques can help in
Modifying these performance parameters. Using
FPGA can generate the required PWM switching function easily and economically.