Simplified approach for the analysis and design of DC drive system

A simplified frequency method for the parameters design of a thyristor speed regulator of a d.c motor is presented. The approximation of dynamics of the thyristor controller by Pades expansion simplifies the design and gives more accurate results than that when using the approximation by means of Hurwitz polynomial approximation or other conventional approximation techniques. The proposed method gives a simple approach for analysis and design of d.c. drive system parameters without going to the more complicated methods suggested recently for solving the d.c. drives problem.