What is cogging and crawling phenomenon in motor.

Answer Posted / upenderb

Cogging:the tendency of locking of rotor with the stator poles when they have equal slots or any similarities between the slots is called cogging
Crawling:the tendency of rotor to rotate at a low speed equal to the seventh space harmonic i.e Ns/7 if there are considerable amount of harmonics is called crawling

Is This Answer Correct ?    2 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

3ph motor running with unequal kw and different pf what are the reasons

1224


The power supplied to a 50mH inductor from a 120V, 60Hz source will be

4240


Initially, when the input is not equal to the output — what type of response is this?

667


why we not used 11kva as a direct our electrnics component.

2344


EXPLAIN THE ESSENTIAL FACTORS WHICH INFLUENCES THE CHOICE OF SITE FOR A HYDRO ELECTRIC POWER PLANT

1556






To prove the capacity of a 10MVA transforemr with 6.5% impedance by a short circuit test how much power is needed to inject an impedance voltage if we have to arrive for its rated current?

1446


why HT armoured cable does not glanding

3695


How it can worked plc based electrical system And which type of software using.

1675


why we have and use 3 phase not 2 or 4 or other in power system?

1689


When we have earthing mesh or underground earthing network in industrial plants, weather we have NT-S or NT-C-S kind of earthing system, so eventually weather we must use 4 or 5 wire in 400 volt level (For example 3×150+70 mm2 or 5×150 mm2) in this connection I would like to know exactly the paragraph of IEC or IEEE number

1700


What aturn on methods of scr?

709


Whether 3 phase induction motorwith 100 hp capacity , Amp 160 for which sensitive earth fault relay , type CTUM 15 can be used?

990


what is the difference between linear choke and suction choke?

2182


What the main causes of transient interruptions on Over-Head Distribution Lines?

1589


What is the earth treantment procedure?

1611