advanced electric drives analysis control and modeling using matlab simulink pdf

There are many electromechanical systems where it is important to
precisely control their torque, speed, and position. Many of these, such
as elevators in high-rise buildings, we use on daily basis. Many others
operate behind the scene, such as mechanical robots in automated
factories, which are crucial for industrial competitiveness. Even in
general-purpose applications of adjustable-speed drives, such as pumps
and compressors systems, it is possible to control adjustable-speed
drives in a way to increase their energy efficiency.

Advanced electric
drives are also needed in wind-electric systems to generate electricity
at variable speed, as described in Appendix 1-A in the accompanying
website. Hybrid-electric and electric vehicles represent an important
application of advanced electric drives in the immediate future. In most
of these applications, increasing efficiency requires producing maximum
torque per ampere, as will be explained in this book. It also requires
controlling the electromagnetic toque, as quickly and as precisely as
possible, illustrated in Fig. 1-1, where the load torque TLoad may take a
step-jump in time, in response to which the electromagnetic torque
produced by the machine Tem must also take a step-jump if the speed
ωm of the load is to remain constant.