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WorksheetsCycloconverter
Total questions: 11
Worksheet time: 6mins
A cycloconverter is a _________
one stage power converter
one stage voltage converter
one stage frequency converter
Applications of cycloconverters include
speed control of ac drives
induction heating
static VAr compensation
all of the mentioned
The single phase mid-point type cycloconverter uses __________ number of SCRs.
4
12
8
6
The single phase bridge type cycloconverter uses __________ number of SCRs.
4
8
6
In the positive half cycle, which of the statement is correct
P1 and P2 are forward biased
N1 and P2 are forward biased
P1 and N2 are forward biased
In the below given cycloconverter circuit, _________ and _________ conduct in one cycle together.
P1, P2 and N1, N2
P1, N2 and N1, P2
N1, P1 and N1, P2
In the positive half cycle, _________ SCRs are forward biased.
P1, P2, N1, N2
P1, P2, P3, P4
N1, N2, N3, N4
P3, P4, N1, N2
The principle of three phase cycloconverter is to
add and remove number of SCRs
vary progressively the firing angle of the devices
keep the firing angle as 0° for all the devices
In a three phase half-wave cycloconverter ___________
both inverting and converting action takes place
only inversion action takes place
only converting action takes place
The main application of cycloconverter is ______
traction
speed control of synchronous motor
speed control of dc motor
lift and hoist
The cycloconverter require natural or forced commutation as under
Natural commutationin bothstep-up and step down cycloconverter
Forced commutation in both step-up and step-down cycloconverter
Forced commutation in step-up cycloconverter
Forced commutation in step-down cycloconverter
