Answer / udhaya kumar

DC motors provide excellent speed control for acceleration
and deceleration with effective and simple torque control.
applications:- traction motor,marine lift,Train
motor.etc

Answer / vikas pratap singh

The brushed DC motor generates torque directly from DC power supplied to the motor by using internal commutation, stationary permanent magnets, and rotating electrical magnets. Advantages of a brushed DC motor include low initial cost, high reliability, and simple control of motor speed. Disadvantages are high maintenance and low life-span for high intensity uses. Maintenance involves regularly replacing the brushes and springs which carry the electric current, as well as cleaning or replacing the commutator. These components are necessary for transferring electrical power from outside the motor to the spinning wire windings of the rotor inside the motor.

Answer / ram ganeshia

it is harmonics less high starting torque, easy speed
variation less distortion at brush contacts.
uses: traction, lifts etc.

Answer / phanendra babu

it is completely depends on the application i.e where we are
using the motor.if we require high starting torque dc series
motor is applicable or we require better speed vs current
chars. dc shunt motor is suitable,like wise depending upon
the application it will change. and the main advantage of dc
motor over ac is speed controlling ig very very easy
compared to ac motors.

What is d diff. btw Online & Offline UPS???

4 Answers   Emerson,

---

If my sfu is 64 Amp & its link is 32 Amp then at what amp.my sfu will trip???

2 Answers  

---

What is C check in a diesel generator and what are parts and what has to be done during the C check

4 Answers  

---

How much minimum insulation required between 11kv/3.3kv transformer windings?

0 Answers   Descon,

---

we are having 110 Kv,250mA Electrostatic precipitators for coal fired boilers. what will be static voltage and current after discharge and what time it will remain before earthing?

0 Answers   Siemens,

---

---

Why do we need a separate control desk & PLC control panel in Boiler plant or coal handling plant? Can we provide cost effective Control desk cum PLC panel. Is there is an specific need for control desk.. kindly advice.

0 Answers  

---

11kv/433v delta/star distribution transformer primary side full load Ht current is 83.33A in , but input side VCB rating 800A.why?

0 Answers  

---

what is the difference between current voltage transformer and current transformer and where it is used?

2 Answers  

---

IDMT relay are mostly used for protection against..??? 1)Earth Fault 2)Inter turn fault 3)Overloading 4)None of the above

1 Answers   Indian Railways,

---

why the neutral point in connnection oscillates?

0 Answers   Avalon,

---

what are lightning masts?what is their purpose???

1 Answers   Mecon,

---

what is at/cm ?

3 Answers  

---