can u provide me the general equation for servo motor? thanks
If you are using a DC motor, it will be shunt or compound, not series wound, because you have to have a fine control of the rpm. Any motor can be converted into a servo motor with a positioning control system. AC motors can also be used. Wound rotor induction motors are the best, because they allow good speed control. For low power applications, such as printers and disk drives, stepper motors are used, which allow very precise position control by counting steps. There is no general equation for a servo motor. Perhaps you are looking for the transfer function of a motor, which normally is first order, with a time constant proportional to the mechanical inertia. rpm(s) / power_in(s) = 1 / (1 + s T) s : Laplace operator T = inertia time constant Inductance time constants are usually neglected. .
It depends on the servo motor. Try going to a few websites of companies that make servo motors and you'll have all the information you'll ever need to choose a good motor for your application. Doug
Where is the specific purpose ? If it is used for measurement Generally Servo motors are magneto motors.In traction series , some place compound also used .
