AC motors are generally considered to be more powerful than DC motors because they can generate higher torque by using a more powerful current. However, DC motors are typically more efficient and make better use of their input energy.
Which motor has higher torque?
The capacitor start motor develops a much higher starting torque of about 3 to 4.5 times of the full load torque.
What is the advantage of DC motors over AC motors?
DC motors have the advantage of: higher starting torque, quick starting and stopping, reversing, variable speeds with voltage input and they are easier and cheaper to control than AC. AC motor advantages include: lower power demand on start and minimal maintenance.
Do DC motors have high starting torque?
The torque of the DC series motor is proportional to the square of the armature current. That is why the DC series motor has high starting torque. The DC series motor produces the highest torque among all kinds of motors.
Which torque is greater in DC motor?
Torque(T)= (Ia)^2. Thus we observe from the above equation that, torque in DC Series Motor is directly proportional to the square of armature current and torque is directly proportional to armature current in DC shunt motor. This is the reason why DC series motor have high starting torque than DC shunt motor.
Why do DC motors have more torque?
In electrical terminology, a parallel circuit is referred to as a shunt. Therefore, DC motors in which the armature and field windings are connected in parallel are called DC shunt motors. … The net voltage increase causes the armature current to increase, which increases the motor torque.
Why does a DC series motor has a high starting torque?
In case of series motor the flux produced is directly proportional to the armature current. Hence torque is directly proportional to the square of armature current. So as current during starting is 1.5 times the rated so starting torque is higher for series motor.