50 TOP POWER ELECTRONICS Interview Questions and Answers PDF POWER ELECTRONICS Interview Questions PDF
50 TOP POWER ELECTRONICS Interview Questions and Answers PDF POWER ELECTRONICS Interview Questions PDF
50 TOP POWER ELECTRONICS Interview Questions and Answers PDF POWER ELECTRONICS Interview Questions PDF
50 TOP POWER ELECTRONICS Interview Questions and Answers pdf POWER ELECTRONICS Interview Questions
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value only.
26. What is the necessity to use the special machines?
General purpose motors (Induction motors, synchronous
motors) are neither precision speed nor precision position
motors. For many automated systems require high precise
speed and high precise positioning motors. In such cases
special purpose motors like stepper motors, PMDC motors
etc. are used.
27. What are the control strategies of chopper?
The control strategies of chopper are
1. Pulse width modulation PWM (Variable TON, Constant
frequency)
2. Frequency modulation (Constant TON or TOFF,
Variable frequency)
3. Current Limit Control (CLC)
28. What is delay angle or what is firing angle of phase
controlled rectifier?
The delay angle is the angle at which thyristors are
triggered after zero crossing.
After zero crossing of supply voltage, one pair of thyristors
is forward biased. ie, After delay angle() these SCRs are
triggered.
29. What is Universal Motor?
It is defined as a motor which can be operated either on DC
or single-phase AC supply at approximately the same speed
and output.
The universal motor is built exactly like a series DC motor.
But a series DC motor cannot be run as a universal motor,
even though both motors look the same internally and
externally.
We cannot use these motors in the industrial applications
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SVSR
NOVEMBER 1 8, 2 01 6 AT 5:2 6 PM
p.s.v.sairam(SVSR)
NOVEMBER 1 9, 2 01 6 AT 4:08 PM
Sir
Will you please mail the objective
Type questions and answers PDF to me
Requesting you
Thanks.
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yamini
SEPTEMBER 1 7 , 2 01 6 AT 4:3 9 PM
pradip kumar
AUGUST 2 , 2 01 6 AT 6:01 PM
Adeel
MAY 2 0, 2 01 6 AT 1 0:49 AM
Hi Sir,
Can u please mail question & answers pdf file to
me .
Thank you !
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