why the starting torque is high in dc series motor..
Answers were Sorted based on User's Feedback
Answer / nilkanth tailor
COZ, TORQUE IS DIRECTLY PROPORTIONAL TO THE SQUARE OF THE
CURRENT...SO THAT THIER IS VER HIGH CURRENT PRODUCE IN THE
STARTING OF DC SERIES MOTOR...AND IT IS DIFFICULT TO
CONTROL HIGH CUURENT...SO GENERALLY D.C. SERIES MOTOR
GENERALLY USEB IN TRAIN...CAUSE TRAIN REQUIRE HIGH STARTING
TORQUE...DUE TO HEAVY LOAD
Is This Answer Correct ? | 13 Yes | 2 No |
Answer / naveen
Torque is proportional to flux and current.
reason why starting torque is high in series motor only is:
in DC series motor, flux is also proportional to current since the field winding is series with DC motor.
and the reason why its high in start is :
in starting back emf is 0 . current=(V-Ef)/R when Ef is 0 current attains high value which decreases as the speed of motor increases and thus the Ef.
Is This Answer Correct ? | 3 Yes | 0 No |
Answer / ubendran mv
In SERIES MOTORS, the field windings are connected in
series with the armature coil. The field strength varies
with changes in armature current. When its speed is reduced
by a load, the series motor develops greater torque. Its
starting torque is greater than other types of dc motors.
Its speed varies widely between full-load and no-load.
Unloaded operation of large machines is dangerous.
Is This Answer Correct ? | 3 Yes | 2 No |
What is the multiplying factor if line ct ratio is 1000/1 and meter ct ratio is -/5 ?
why capacitor using the induction motor?
What is referred to the electron in the outer orbit?
what does the transformer connection symbol YNaod1 mean ?
can any one help me? 1.what is corona extinction voltage&corona inception volatage 2.what is mean by CFVV?
Why derating factor os applied on Cables?
What is Harmonics & what are its efect & which harmonic is dangerous
What is Tan Delta Test
Iam Preparing For Ap Transco Assistant Engineer (ELECTRICAL) Exam how To Prepare What Is The Refernce Books.can You Give The Advises To Me.tahnk You. This Is Radhika Iam Preparing For Ap Transco Assistant Engineer (ELECTRICAL
which course is maximum demand in industry and give me the list of best courses for electrical engineers
why do select 11000v rubber mat even we use only 415Volts
1 Answers Saint Gobain, Tata Steel Limited,
How many types of relay are present in a VCB and ACB, what are the tests we can conduct on both breakers and how to set the relays values