how the 12 pulse rectifier is made?
Answers were Sorted based on User's Feedback
Answer / venu
Is it possible to obtain more pulses than twice the number
of phases in a rectifier circuit? The answer to this
question is yes: especially in polyphase circuits. Through
the creative use of transformers, sets of full-wave
rectifiers may be paralleled in such a way that more than
six pulses of DC are produced for three phases of AC. A 30o
phase shift is introduced from primary to secondary of a
three-phase transformer when the winding configurations are
not of the same type. In other words, a transformer
connected either Y-Δ or Δ-Y will exhibit this 30o phase
shift, while a transformer connected Y-Y or Δ-Δ will not.
This phenomenon may be exploited by having one transformer
connected Y-Y feed a bridge rectifier, and have another
transformer connected Y-Δ feed a second bridge rectifier,
then parallel the DC outputs of both rectifiers. (Figure
below) Since the ripple voltage waveforms of the two
rectifiers' outputs are phase-shifted 30o from one another,
their superposition results in less ripple than either
rectifier output considered separately: 12 pulses per 360o
instead of just six:
Is This Answer Correct ? | 15 Yes | 3 No |
12 pulse rectifier can be formed by using two six pulse converters (i.e 3-phase converters )connecting in series
Is This Answer Correct ? | 2 Yes | 1 No |
Answer / haajee
Read PDF file for detailed description
http://tinyurl.com/4vkrkdl
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / vinutha
it can be made using 2 rectifier bridges connected in
parallel to three phase transformer winding
Is This Answer Correct ? | 0 Yes | 1 No |
Answer / venu
again sorry delta it is taking different numbers .it is
nothing but delta
Is This Answer Correct ? | 1 Yes | 3 No |
Can any body tell me about Hi-pot test, and why it is necessary and its procedure of testing
what is the distance b/w EHV lines? 1.8m 2.11m 3.4m 4.14m
What is meant by reset level of the relay?
Dear Sir I am living in Jaipur Rajasthan now I did complete my b tech degree in electrical engineering in 2012 Sir how I gate certificate of competency for electrical supervisor
STATE AND EXPLAIN SUPER POSITION THEOREM.
What are the weight of 800KV DA,DB and DC type tower ?
How does frequency affect KVA rating of a transformer? If a 500 kva, 500 to 250 v, 60 hz t/f normally used in Canada is to be operated in Europe on 50 hz frequency then how will its KVA rating change? a-increase b-decrease c-remains same
I am getting above 60 V as open delta voltage against single phase unit ICT at tertiary delta formed and ICT getting trippped on NDR. ICT tested and found in order. PTs provided on tertiary are tested and in order. what may be the reason?
string efficient is 100% what is the voltage across the each disk?
How many straight through joint is permissible in single core 33kv XLPE cable for a length of 985 mtr.
what is static frequency converter?what is the function...of sfc...?
how to check the 3ph capacitor is good or not.
14 Answers MacLellan, Yash Technologies,