i want ppt and documentation for modern speed conrol technologies of ac motors

A large number of motors are being used for general purposes in our environment, from household equipment to machine tools in industrial facilities. The electric motor is now an indispensable and indispensable source of power in many industries. The function and performance required for these engines are extensive. When attention is focused on the engine speed control segment, servo motors and stepper motors control their speed with a pulse train, while the induction motor and the brush-less DC motor control the speed With an external resistance and / or DC voltage.
This article explains the structure, speed control principle and features of the following three product groups that can control speed with relative ease using an analog input.

• AC speed control motor and gear motors
  
• Brushless DC motor unit
  
• Investment unit
                                                                                                                                               Reference :http://www.orientalmotor.com/technology/articles/article166-1e.html