the speed N is inversely proportional to armature current I. At light loads this current is very small. Hence motor will run at very high speed when started on no load/light load.........
never
DC Series motor should never run without load connected to it because starting torque for DC series motor is infinite and running it on no load will damage the motor due to overspeeding.
At no load, the flux is only due to the residual flux, which is very small. the no load speed of dc series motor is very high. so the rotating part of the motor are damaged. hince dc series motor should never be run without motor.
a series motor started without load can go into a condition called runaway. The motor will rapidly accelerate to unsafe speeds literally pulling itself apart. This condition should never be allowed to happen. Consult a professional when installing any electrical equipment.
if you run the unloaded motor at max rpm the centrifugal forces will cause the motor to be totally destroyed so it is advisable to not to run it at max rpm it should be okay to run it till 50% of max rpm without loading it
Tony Stewart has never driven full-time for the Nationwide Series (formerly known as the Busch Series). As a part-time driver in the series from 1996-2013, he started 94 races.
since torque is proportional to flux and armature current . Flux for dc shunt is constant . torque is proportional to armature current only. And initially armature current is very low hence it cannot be started at load .
HARRY POTTER LEFT HOGWARTS IN HIS SEVENTH YEAR HE NEVER STARTED HIS SEVENTH YEAR EITHER!!!
It was actually never said on the show. Maxwell's wife (Sara) died many years before the series started.
Never Should've Started was created in 1980.
That`s 2 problems, it should not light until it is proven the the draft fan has come on. First- Why does`nt the draft motor start? Second- Why does it light without the draft motor running?
There was never a Roman emperor that started a fire that destroyed half of the city.There was never a Roman emperor that started a fire that destroyed half of the city.There was never a Roman emperor that started a fire that destroyed half of the city.There was never a Roman emperor that started a fire that destroyed half of the city.There was never a Roman emperor that started a fire that destroyed half of the city.There was never a Roman emperor that started a fire that destroyed half of the city.There was never a Roman emperor that started a fire that destroyed half of the city.There was never a Roman emperor that started a fire that destroyed half of the city.There was never a Roman emperor that started a fire that destroyed half of the city.