These types of motors are incredibly compact and due to the high efficiency of the helical in line gear packing containers} produce a very high torque in a small frame size. Because of the As a result of use of sealed gear packing containers} they are also best suited} for clean room applications as required in drug|Prescription} and Semi conductor developing }. Tacho Generator and velocity control is achieved by using simple speed control mechanism. Here the motor velocity can be varied in a stepless fashion from 90rpm to 1440rpm. The three phase motor can be handled using an inverter. The speed of the motor can be handled from 30rpm to 1440rpm and the 3 phase motor gives better lower speed torque.