Answer / eugene

Speed control control of induction type motors (also known
as squirral cage motors), are mainly achieved by
controlling the input voltage to the motor terminals. This
can be done by altering the frequency of the supply by
using a Variable Speed Controller, or if the speed control
is allowed to be multi-staged, resistive circuits can be
inserted using contactors and resistors, thus limiting the
voltage applied.

Answer / jaimin modi

1.control from stator side
a.by changing applied voltage
b.by changing stator no. of poles
c.by changing applied frequency

2.control from rotor side
a.by rotor rheostate
b.by cascade operation
c.by injecting emf in rotor ckt.

Answer / ravi roushan

through vfd.

Answer / karpagam

The motor speed control for controlling the speed
of an electric induction motor is by modulating the
amplitude and frequency of the driving voltage. When load
increases the speed control controls the speed of the
machine so as to be relatively constant with respect to
frequency of the driving voltage. Obviously,the speed
control controls the amplitude of driving voltage in
proportion to the square of the frequency.

what is the relation between frequency and inductive reactance in a d.c supply?

2 Answers   L&T,

---

Direction of flow of active power and reactive power with logic?

0 Answers  

---

why distribution transformer is uesd in Delta/Star formation?is there any significance in doing this?If yes then breif?

3 Answers  

---

What happens when generator is running with leading power factor on it say -0.96. what are the effects of it on alternator and the other generators operating in parallel to it.

2 Answers  

---

difference between ac and dc motor

1 Answers  

---

Write the force balance equation of ideal spring element.

0 Answers  

---

If you don’t have coal, salt and copper, then how would you earth your connection temporarily at a camp site.?

1 Answers   Focus,

---

how many types of transformer.

3 Answers   Technocrats,

---

why the motor running in delta connection ? it can be in star?

13 Answers   NTPC,

---

i have total 8 dg sets for synchronizing and 2 buscoupler,1 sectoin dg no 1,2,3,and 2 sectoin dg no 4,5,6,and last section dg no 7,8 ....if buscupler no 1 and 2 is off mode ..than dg no 1,2,3,will synchroniz of another dg sets?

0 Answers   Crown Buildtech,

---

how do i calculate voltage drop-if length is 1000 meter,amps is 160a

1 Answers  

---

What Is Sampling?

0 Answers   Mahatma Gandhi University,

---