What are the characteristics of a DC series wound motor?

What are the characteristics of a DC series wound motor?

In a series DC motor the field is connected in series with the armature. The field is wound with a few turns of large wire because it must carry the full armature current. A characteristic of series motors is the motor develops a large amount of starting torque.

What is a series wound DC motor used for?

The series motor provides the starting torque required for moving large loads. Common uses of the series motor include crane hoists, bridge and trolley drives on large overhead cranes and traction motors used to drive trains. Series wound motors are designed to get massive amounts of weight moving.

What is a series wound electric motor?

(Electrical engineering: Electrical power, Motor or generator) If a motor or generator is series-wound, it has the field and armature circuits connected in series. An inductor and a power resistor are placed in series to simulate the resistance and inductance of a large series-wound DC motor.

What is the biggest advantage of a series wound DC motor?

Advantages of DC series motors: Protection is very easy. It is cost-effective. Series wound motors can use for AC or DC supply so it is also known as universal motors. Compare with shunt motor DC series motor develop power for the same construction size.

How the characteristic of DC series motor differs from DC shunt motor?

A series motor respond by decreasing its speed with small increase in current for a given load torque. A shunt motor holds its speed nearly constant with large increase in input current for same amount of load torque.

Do series wound motors have brushes?

Brush Life These motors use mechanical commutation to connect the power supply to the armature windings; as a result, the carbon brushes which are the connecting points for this commutation will eventually wear down, and must be replaced periodically.

What are the characteristics of a series motor?

The characteristic curves of a DC series motor are those curves which show relationships between the following quantities.

• Torque and armature current (Ta/Ia characteristic).
• Speed and armature current (N/Ia characteristic)
• Speed and torque (N/Ta characteristic) It is also known as mechanical characteristic.

What are advantages and disadvantages of a series motor?

Speed regulation in the series motor is quite poor. With the increase in the load speed of the machine decreases. (DC shunt motor maintains almost constant speed from no load to full load). DC series motor should always require to be loaded before starting the motor.

What is the difference between series wound and shunt wound?

The series winding is designed with few turns of thick wires. The shunt field winding is designed with large number of turns having thin wires. The resistance of the series field winding is very low. The resistance of the shunt field winding is very high.

What are the key differences between series and shunt wound DC motors?

In a DC shunt motor, torque is proportional to armature current (as shown in the torque equation below). In contrast, for a series-wound DC motor, torque increases as the square of armature current.

Why should a series wound motor never be disconnected from a load?

A series motor should never be started at no load. With no mechanical load on the series motor, the current is low, the counter-EMF produced by the field winding is weak, and so the armature must turn faster to produce sufficient counter-EMF to balance the supply voltage. The motor can be damaged by overspeed.

What is mechanical characteristics DC series motor?

In a DC series motor, the field winding is connected in series with the armature and hence carries the full armature current. When the load on shaft of the motor is increased, the armature current also increases. Hence, the flux in a series motor increases with the increase in the armature current and vice-versa.