Characteristics of dc motor ppt

Torque Vs Armature current characteristics of DC Shunt motor This characteristic gives us information that, how torque of machine will vary with armature current, which depends upon load on the motor. CUMULATIVE COMPOUND DC MOTORS b) . The compound wound self excited dc motor or simply compound wound dc motor essentially contains the field winding . Compound or Stabilized – Shunt Motors. Effect of Magnetic Saturation on.

Pole flux is not directly proportional .

These are explained below for each type of DC motor.

These characteristics are determined by keeping the following two relations in mind. Much appreciation to David Cowden at Ga. DC power systems are not very common in the contemporary engineering practice.

For appreciable generation of emf, the. The compound motor has better speed characteristic than the series motor and better torque characteristics than the shunt motor.

The motor can be connected so that the shunt field and . Given armature resistance Ra= . Separately Excited and Shunt DC Motors. Speed Control of Shunt DC Motors. ELECTRICAL ENGINEERING: PRINCIPLES AND APPLICATIONS, Third Edition, by Allan R. Compute electrical and mechanical quantities using the equivalent circuit. Understand the operation and basic characteristics of simple DC motors.

Study some applications of DC motors.

Recommended text for this section of the . One commonly used method of displaying motor characteristics graphically is the use of torque - speed curves. TOPICS TO DISCUSS Introduction to DC MOTORS. To establish the torque equation, let us first consider the basic circuit diagram of . DC motors - Introduction Advantages: Leading role until years.

Since Eb ∝ N, given by, This can be graphically explained below. This reduction in the counter emf or the back emf Eb in the increase of the . Cumulative compound dc motor connections . Direct current motors, series wound dc compound motor ppt slideshare. Electrical4u electrical4u compound wound dc motor or url?

Characteristic of cumulative compound motor my tech info.

The structure of thethe variable compound dc . This is called starting of the motor. The operating speed itself should be varied as per the requirements of the load. Finally, the running machine has to be brought to rest, by decelerating the same.

The torque speed characteristics of the machine is modified to achieve these . In recent years, the use of DC ma-. DC machine became less impor- tant.

Chines has become almost exclusively asso- ciated with applications where the unique characteristics of the DC motor (e.g., high. Starting torque for traction motor applica- tion) justify its cost, . If you think about the attraction and repulsion of the north and .