For a particular DC Motor, the number of poles (P) and the number of conductors per parallel path (Z/A) are constant. Thus, from the above equation (5) it is clear that the torque produced in the armature is directly proportional to the flux per pole and the armature current.
Which is proportional to the torque in dc motor answer?
For DC Machine, torque is directly proportional to armature current and flux. In dc shunt motors, flux is constant (not dependent on armature current). Hence torque is proportional to armature current.
Which is proportional to the torque in DC?
Answer : The current drawn by the armature of D.C. motor is directly proportional to the torque required.
Is DC motor torque proportional to current?
Electrical motor torque is proportional to the product of magnetic flux and the armature current.
What is the torque of DC motor?
Torque equation of a DC motor
When armature conductors of a DC motor carry current in the presence of stator field flux, a mechanical torque is developed between the armature and the stator. Torque is given by the product of the force and the radius at which this force acts.
How do you increase the torque of a DC motor?
Any DC motor will experience a decrease in speed when a load is applied, which causes the back EMF to decrease. The reduction in back EMF increases the net voltage, since the supply voltage remains constant. The net voltage increase causes the armature current to increase, which increases the motor torque.
Is current directly proportional to torque?
We know that torque is directly proportional to the product of armature current and field flux, Ta ∝ ɸ.
What are the factors affecting torque in DC motor?
Input Voltage: For a fixed load, the speed of the motor is affected by the applied voltage. Increase in voltage = increase in speed. Load Torque: For a fixed voltage, the speed of the motor is inversely affected by the load. Increase in load torque = decrease in speed.
Is current proportional to RPM?
DC motor rpm is proportional to current and voltage,up to some limit only. rpm(speed),load and current varies as per the characteristics of different DC motors (series, shunt and compound wound ).
Why is current proportional to torque?
With a constant voltage, the amperage drawn directly represents the load. So, increasing the load, results in an increase in the amperage. Even if the increased torque results in a decrease in speed, the amperage will increase unless the speed reduction is inversely proportional to the increase in torque.
Is torque directly proportional to horsepower?
Horsepower = Torque x Engine RPM/5252
The level of horsepower an engine can deliver is directly proportional to the level of torque generated by the crankshaft, which is directly proportional to the total displacement capacity of the engine.
Is torque inversely proportional to speed?
Torque inversely propositional to speed: In such types of loads, torque is inversely proportional to speed or load power remains constant. … Equilibrium speed of motor-load system can be obtained when motor torque equals the load torque.