What will happen to the torque of the DC motor if the current or voltage of the motor is increased?
In case of DC shunt motor, the flux per pole is considered to be constant, torque increases with the increase of load current. If the load current increases then the armature current also be increased and the speed slightly falls due to increase in voltage drop in armature.
What will happen to a torque if a DC series motor is accidentally connected to single phase AC supply voltage?
The torque produced will be. of zero average value.
What will happen to torque if armature current of the series DC motor is doubled?
What will happen to torque if back emf and speed of the DC motor is doubled? Explanation: Torque depends on armature current, so as long as armature current remains constant torque will not change. Speed depends directly with back emf thus, it will definitely become double when back emf is doubled.
How do you increase the torque of a dc motor?
If the speed is to remain constant then the back-emf must also remain constant. Then the only way to increase torque is to increase the armature current and the only way to increase the armature current is to increase the supply voltage. This in effect is how a speed controller works.
How is torque produced in dc motor?
When a DC machine is loaded either as a motor or as a generator, the rotor conductors carry current. These conductors lie in the magnetic field of the air gap. Thus each conductor experiences a force. Hence torque is produced at the circumference of the rotor and rotor starts rotating.
How is torque developed in a DC motor?
When a DC machine is loaded either as a motor or as a generator, the rotor conductors carry current. These conductors lie in the magnetic field of the air gap. Thus, each conductor experiences a force. Hence, a torque is produced around the circumference of the rotor, and the rotor starts rotating.
When the armature current of dc series motor is reduced by 5\% it torque will *?
Answer. (a) constant torque control. (b) constant power control. (c) constant voltage control.
Which is proportional to the torque in dc motor?
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.