Answer / bharat

Field control & Armature control.

Ref. Electrical Technology, Auth. BL Theraja Vol-II

Answer / balamurugan

ward leonard method,armature control.

Answer / erharisheee51

BY CONTROLING THE VOLTAGE , WE CAN CONTROL THE SPEED OF THE
MOTOR.

Answer / soutrick chakraborty

we can control the speed of the dc shunt motor by two
methods. but at first we should know there are two type
speed, 1> base speed 2> top speed. for reach the base speed
we increase the armature voltage maximum , which is
mentioned in motor nameplate. and reach the top speed we
should decrease the feild flux, it means feild current,
which is also mentioned in motor name plate.

How current is reduced in STAR connection?

6 Answers  

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I have connected 04nos. earthings to a transformer through 04nos. earthing pits seperately. 02nos. earthings are connected to T/F body, and 02nos. earthings are connected to T/F neutral.T/F capacity is 2000KVA, 11KV/415V. But after completing of 02 years successful operation ,we are facing following problems- 1. CT/PT occured blast one time 2. HT cable box occured blast two times 3. One body earthing strip and one neutral earthing strip of transformer are overlapping at some places. Whenever these two strips are pressed at overlapped points, they made spark. What is the reason of spark? Please explain the reason & rectification of above problems

5 Answers  

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if u want to buy a motor than what will be the configuration of that motor?

2 Answers  

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What is the normal earth resistance?

11 Answers  

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I want the details about BHEL company examination.Can anyone able to help me please.

0 Answers  

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WHAT IS REACTIVE POWER?

2 Answers  

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What is power transformer?

3 Answers   Welspun,

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what is meant by IGBT how they differ from tyristor ?

0 Answers  

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Which oil can be used in transformer?

1 Answers  

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what is ten delta test? what is the significanse of it

1 Answers  

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why DC source is used to idetify the polarity of CT/PT?

1 Answers  

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what will happen if i will done heart shape hole in transformer core?

1 Answers   Bhel, ONGC,

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