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DC series Motor

A type of DC motor where the armature and field windings are connected in series.

Torque Vs Armature current characteristics

The relationship showing how torque developed in a DC series motor is proportional to the armature current.

Speed Vs Armature current characteristics

A characteristic that shows speed is inversely proportional to the armature current until saturation in a DC series motor.

Cumulative compound Motor

A motor where the shunt field aids the magnetic fields of the series field and armature, providing high starting torque and good speed regulation.

Differential compound Motor

A motor where the shunt field opposes the magnetic fields in the armature and series field, leading to unstable speed characteristics.

Long shunt compound Motor

A motor type where the shunt field is connected in parallel with both the series field and the armature.

Short shunt compound Motor

A motor type where the shunt field is connected in parallel with the armature and in series with the series field.

Applications of DC series Motor

Common uses include traction, hoists, lifts, cranes, rolling mills, and conveyors due to high starting torque.

Applications of DC compound Motor

Cumulative compound motors are used for elevators, rolling mills, punches, shears, and planers due to their high starting torque.

Characteristic of DC series Motor

Includes Torque Vs Armature current, Speed Vs Armature current, and Speed Vs Torque characteristics.

Flux in DC series Motor

The flux is proportional to the field current; therefore, it cannot remain constant as load changes.

Torque equation for DC motors

Torque in DC motors is influenced by constants such as armature current, pole strength, and the number of conductors.

High starting torque

A crucial characteristic of DC series motors, making them suitable for heavy-load applications.

Saturation in DC motors

A condition where increasing current does not increase the magnetic field strength, affecting torque characteristics.

Rectangular hyperbola

The characteristic curve shape for Speed Vs Torque in a DC series motor.