Answer / ebrahim.p.b

it has been found that induction motors,particularly the
squirrel cage type,sometimes exhibit a tendency to run
stably at a speeds as low as one-seventh of their
synchronous speed.it is known as crawling.

Answer / hari hajare

Crawling in an induction motor is caused by low supply
voltage, high loads, development of harmonics in the rotor,
possibly even design faults. Crawling can be caused when a
small change in load results in an angular displacement of
the rotor field with respect to the stator field a bit
similar to the synchronous motor operation. The effects of
crawling can be reduced by avoiding certain combinations of
stator and rotor slots or altering the position of rotor
bars(skewing).

Answer / arif mondal

The phenomenon of 3 phase Induction motor when runs at
1/7th of its full speed constantly due to the presence of
odd harmonics (generally 5th,7th) in the line is termed as
crawling.

Answer / jai

Creating descriptive categories and file names for the
documents on
your website can not only help you keep your site better
organized,
but it could also lead to better crawling of your documents by
search engines. Also, it can create easier, "friendlier"
URLs for those
that want to link to your content. Visitors may be
intimidated by
extremely long and cryptic URLs that contain few
recognizable words.

Answer / rajeshwar paste

The phenomena due to which motor runs at reduced speed due
to present of harmonics is called crawling.

Answer / ravish gaurav

it has beenion motar found that induction motor particularly
squirrel cage type sometimes exhibits a tendency to run
stably at speed as low as 1/7th of their synchronous
speed.This phenomenonis known as crawling of an induction motar

Answer / sreeram

Due to odd harmonics like 5th nd 7th present in rotor which has reduce the speed of IM at constant loads
which is 1 by 7th of their full load speed

Answer / aditya singh

The stable operation of induction motor near sub-synchronous speed Ns/7 is called crawling which is accompanied by much higher stator current, noise and vibration.
here Ns=asynchronous speed of induction motor

Answer / balaji

i agree wit all

Balaji TK

Answer / bhanutej

under odd harmonic that is 13th harmonic motor runs it 1/7
th of its actual speed .

which loses are in transformer .explane each loses

4 Answers  

How can calculate the rating of a servo stabilizer for given a specific load

0 Answers  

what are the types of transformers

59 Answers  

What is battery Amphere-hour? How the battery back up time period is calculated?

2 Answers  

State superposition theorem?

0 Answers  

how to find value of resistance when 1 kw consumption for 10 minutes

1 Answers   Manipal Hospital,

how we protect the motor & what are the components required for that ?

2 Answers  

What is the Working principle of ELCB and RCCB?

1 Answers   Geo Miler, L&T,

how actually an anti pumping device works? what is the operational principal?

2 Answers  

what is the MNA in case of d.c. machin? whaty is the importance of it? hoe it affect the brush position?

2 Answers   TATA,

In Single Phase AC Supply,If Voltage between Phase and Neutral is 230V means what will be the Voltage between Phase and Earth?

2 Answers  

give me applications of sequence bridges . (used in 3 phase un balanced systems)

0 Answers