Answer / meenakshi

basically torque of dc motor mainly depends on armature
current and flux.for a dc shunt motor ,this flux is nearly
a constant but for dc series motor this flux is mainly
dependent on armature current.so torque of dc series motor
is now dependent on square of armature current. hence it
has a very high starting torque.

Answer / s.a.koushik

In series motor the field and armature winding are in series connection.so when starting what ever the current drawn by the armature winding passes through field winding also.since current flow is not restricted in series circuit.so the amount of flux produced bu field and armature winding will be more enough to produce high torque.(because during starting current drawn by armature winding is high).

Without seeing the nameplate descriptions of a rotating machine,Is it possible to say which one is a motor and which one is a generator? How would you certain this?

3 Answers  

---

what will happen if dc motor given ac supply

11 Answers   Mahaveer,

---

why the Parameters : Base Voltage & Maximum Voltage can't be equal in value in a VFD (Variable Frequency Drive) ? How much the base voltage would be lower than the maximum voltage ? If 400 V is the 3 phase output of a VFD ... then what should be the base voltage ? thanks a lot

1 Answers   Yaskawa,

---

How over load relay works.

1 Answers  

---

what is the use of surge suppresser in 33 KV incoming panel. where it must be installed,inseries with incoming cable surge suppresser must be at incoming of the breaker are outgoing of the breaker

1 Answers   Siemens,

---

What is the difference between earthed and unearthed power cable.

1 Answers  

---

What is a transductor ?

2 Answers  

---

Give me the calculation steps to design an electromagnet to be work in 230V 50 Hz AC Supply. Also give force that is created by that electromagnet when it gets energized.

0 Answers   GE,

---

i am going to give the JSEB,RANCHI exam for power plant,so i need some samples of papers related to that,so please send me these papers by my mail id.

0 Answers  

---

What are linear elements and non linear elements? and I don't want answers with graph related

1 Answers  

---

Though transformer consist winding which usually cause reactive power change in both generator and motor but it wont affect reactive power passing through transformer why?

2 Answers   Jindal, Reliance,

---

what is stay bow?

2 Answers  

---