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Why the power factor of semiconverter is better than full converter?
asked
Mar 8, 2018
by
anonymous
recategorized
Apr 21, 2018
by
anonymous
Why the power factor of semiconverter is better than full converter?
power
factor
semiconverter
better
full
converter
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1
Answer
answered
Mar 8, 2018
by
anonymous
Power factor of semiconverter is better than full converter
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Related questions
asked
Jul 25, 2019
by
anonymous
Give the operation of single phase full wave bridge controlled converter with RL load with a neat diagram. Also draw its waveform.
Give the operation of single phase full wave bridge controlled converter with RL load with a neat diagram. Also draw its waveform.
Last answer:
Single phase fully control bridge converter with RL load: 1. During positive half cycle of input voltage, T1 and T2 are forward biased and during negative half cycle, T3 and T4 are forward biased. Therefore, T1-T2 ... cycle till the firing of next pair of SCRs as shown in the waveform.
single
phase
full
wave
bridge
controlled
converter
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158
views
1
answer
asked
Mar 11, 2018
by
anonymous
Describe the gate circuit for a single phase full converter.
Describe the gate circuit for a single phase full converter.
gate
circuit
single
phase
full
converter
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58
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0
answers
asked
Feb 12, 2018
by
anonymous
Explain full bridge converter.
Explain the operation of full bridge converters with their different operating modes. State its advantages and disadvantages.
Last answer:
Full bridge converter: Full bridge converter provides isolation between input and output. Full bridge converter is used for step up or step down the input voltage. Full bridge converter consists of four power semiconductor ... Require filter on both input and output.
full
bridge
converter
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213
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1
answer
asked
Nov 16, 2017
by
anonymous
single phase full converter
single phase full converter
Last answer:
single phase full converter
single
phase
full
converter
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84
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1
answer
asked
Apr 29, 2018
by
anonymous
A 3 -phase, fully controlled, converter is feeding power into a DC load at a constant current of 150 A, the rms
A 3 -phase, fully controlled, converter is feeding power into a DC load at a constant current of 150 A, the rms value of the current flowing through each thyristor of the converter is
Last answer:
A 3 -phase, fully controlled, converter is feeding power into a DC load at a constant current of 150 A, the rms value of the current flowing through each thyristor of the converter is 150/√3
fully
controlled
converter
feeding
power
dc
load
constant
current
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1
answer
asked
Mar 20, 2018
by
anonymous
A synchronous motor has better power factor as compared to that of an equivalent induction motor...
A synchronous motor has better power factor as compared to that of an equivalent induction motor. This is mainly because?
Last answer:
A synchronous motor has better power factor as compared to that of an equivalent induction motor. This is mainly because stator supply is not required to produce magnetic field.
synchronous
power
factor
equivalent
induction
motor
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1
answer
asked
Apr 28, 2018
by
anonymous
In voltage source converter based HVDC transmission system the active power is controlled by changing
In voltage source converter based HVDC transmission system the active power is controlled by changing (A) phase angle of the converter ac input voltage (B) supply frequency of the converter ac input voltage (C) magnitude of the converter ac input voltage (D) DC voltage at the inverter terminals
Last answer:
In voltage source converter based HVDC transmission system the active power is controlled by changing phase angle of the converter ac input voltage
voltage
source
converter
hvdc
transmission
system
active
power
controlled
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1
answer
asked
Mar 20, 2018
by
anonymous
The standard full-load power factor ratings for synchronous motors are?
Last answer:
The standard full-load power factor ratings for synchronous motors are unity or 0.8 leading.
standard
full-load
power
factor
ratings
synchronous
motors
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66
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1
answer
asked
Mar 20, 2018
by
anonymous
Power plant having maximum demand more than the installed rated capacity will have utilisation factor?
Last answer:
Power plant having maximum demand more than the installed rated capacity will have utilisation factor more than unity.
power
plant
maximum
demand
installed
rated
capacity
utilisation
factor
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68
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1
answer
asked
Mar 10, 2018
by
anonymous
Can you have a power factor greater than 1?
Can you have a power factor greater than 1?
Last answer:
We cannot have power factor greater than 1. As it is a measure of cosine of angle between voltage and current.
power
factor
greater
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1
answer
asked
Aug 18, 2019
by
anonymous
Why capacitors are used to improve power factor?
Why capacitors are used to improve power factor?
Last answer:
Capacitors generate reactive power instead of that drawn from source which is required by inductive loads.so it reduce the reactive current which is drawn from source to be drawn from capacitor.This control in Electric bills cost.
capacitors
improve
power
factor
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3
answers
asked
Mar 10, 2018
by
anonymous
Why do we need to correct power factor?
Why do we need to correct power factor?
need
correct
power
factor
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0
answers
asked
Apr 28, 2018
by
anonymous
A 230 V, 50 Hz phase controlled single-phase full-controlled SCR bridge converter draws 15 A constant dc
A 230 V, 50 Hz phase controlled single-phase full-controlled SCR bridge converter draws 15 A constant dc current. If the source inductance is 3 mH, the drop in dc output voltage is (A) 4.5 V (B) 6.75 V (C) 9 V (D) 13.5 V
Last answer:
A 230 V, 50 Hz phase controlled single-phase full-controlled SCR bridge converter draws 15 A constant dc current. If the source inductance is 3 mH, the drop in dc output voltage is 9 V
phase
controlled
single-phase
full-controlled
scr
bridge
converter
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111
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1
answer
asked
May 21, 2020
by
anonymous
Draw single phase full wave mid-point converter for inductive load. Draw input and output waveforms for it.
Draw single phase full wave mid-point converter for inductive load. Draw input and output waveforms for it.
Last answer:
Circuit Diagram: Waveforms:
single
phase
full
wave
mid-point
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177
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1
answer
asked
Mar 10, 2018
by
anonymous
Which is better Arduino or Raspberry Pi?
Which is better Arduino or Raspberry Pi?
better
arduino
raspberry
pi
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54
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0
answers
asked
Aug 25, 2019
by
anonymous
Why is AC better for long distance power transmission than DC ?
Why is AC better for long distance power transmission than DC ?
Last answer:
ac is more economical to transmit for long distances . wires can be made smaller by step up transformer .. since major cost are wires to transmit .. then at the end of distance step down transformer is used for commercial use.
ac
long
distance
power
transmission
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4
answers
asked
May 17, 2020
by
anonymous
What is the value of capacitance required to improve power factor from 0.7 to 0.9.
What is the value of capacitance required to improve power factor from 0.7 to 0.9. Given that: Real power = 50 W Vrms of the source = 120 Frequency = 50 Hz #powerfactor
factor
power
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184
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0
answers
asked
Apr 28, 2018
by
anonymous
The benefit of power factor correction in a power system is
The benefit of power factor correction in a power system is (A) lower power consumption (B) increased demand charge (C) reduced load carrying capabilities in existing lines (D) reduced voltage profile
Last answer:
The benefit of power factor correction in a power system is lower power consumption
benefit
power
factor
correction
system
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1
answer
asked
Mar 25, 2018
by
anonymous
The power factor of a D.C. circuit is always?
The power factor of a D.C. circuit is always?
Last answer:
The power factor of a D.C. circuit is always unity.
power
factor
dc
circuit
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141
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1
answer
asked
Mar 25, 2018
by
anonymous
The ratio of active power to apparent power is known as____ factor.
The ratio of active power to apparent power is known as____ factor.
Last answer:
The ratio of active power to apparent power is known as power factor.
ratio
active
power
apparent
factor
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190
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1
answer
asked
Mar 25, 2018
by
anonymous
The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is?
The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is?
Last answer:
The input of an A.C. circuit having power factor of 0.8 lagging is 40 kVA The power drawn by the circuit is 32 kW.
ac
circuit
power
factor
lagging
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308
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1
answer
asked
Mar 25, 2018
by
anonymous
Power factor of the system is kept high?
Power factor of the system is kept high?
Last answer:
Power factor of the system is kept high to reduce line losses, to maximise the utilization of the capacities of generators, lines and transformers, to reduce voltage regulation of the line.
power
factor
system
high
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1
answer
asked
Mar 20, 2018
by
anonymous
When a D.C. series motor is connected to A.C. supply, the power factor will be low because of?
Last answer:
When a D.C. series motor is connected to A.C. supply, the power factor will be low because of high inductance of field and armature circuits.
dc
series
motor
the
power
factor
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91
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1
answer
asked
Mar 20, 2018
by
anonymous
The power factor of a single-phase induction motor is usually?
Last answer:
The power factor of a single-phase induction motor is usually lagging.
power
factor
single-phase
induction
motor
usually
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1
answer
asked
Mar 20, 2018
by
anonymous
The primary reason for low power factor is supply system is due to installation of?
Last answer:
The primary reason for low power factor is supply system is due to installation of induction motors.
primary
reason
low
power
factor
supply
system
installation
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84
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1
answer
asked
Mar 20, 2018
by
anonymous
The power loss is an important factor for the design of?
Last answer:
The power loss is an important factor for the design of transmission line.
power
loss
important
factor
design
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80
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1
answer
asked
Mar 19, 2018
by
anonymous
Minimum voltage regulation occurs when the power factor of the load is?
Minimum voltage regulation occurs when the power factor of the load is?
Last answer:
Minimum voltage regulation occurs when the power factor of the load is leading.
minimum
voltage
regulation
power
factor
load
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112
views
1
answer
asked
Mar 19, 2018
by
anonymous
What is the maximum value of power factor?
What is the maximum value of power factor?
Last answer:
1 is the maximum value of power factor.
maximum
value
power
factor
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1
answer
asked
Mar 18, 2018
by
anonymous
If the load of the normally excited synchronous motor is increased the power factor will?
If the load of the normally excited synchronous motor is increased the power factor will?
Last answer:
If the load of the normally excited synchronous motor is increased the power factor will become lagging.
load
normally
excited
synchronous
motor
increased
power
factor
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1
answer
asked
Mar 18, 2018
by
anonymous
If the field of synchronous motor is under excited, power factor will be?
If the field of synchronous motor is under excited, power factor will be?
Last answer:
If the field of synchronous motor is under excited, power factor will be lagging.
field
synchronous
motor
excited
power
factor
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151
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1
answer
asked
Mar 16, 2018
by
anonymous
What is the power factor of purely resistive circuit?
What is the power factor of purely resistive circuit.
Last answer:
Unity that is 1
power
factor
purely
resistive
circuit
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169
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2
answers
asked
Mar 10, 2018
by
anonymous
What is the use of power factor correction?
What is the use of power factor correction?
use
power
factor
correction
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0
answers
asked
Mar 10, 2018
by
anonymous
What is the advantage of high power factor?
What is the advantage of high power factor?
Last answer:
Reduced copper losses Smaller conductor size Improve voltage regulation Increase system capability Less energy bill
advantage
high
power
factor
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2
answers
asked
Mar 3, 2018
by
anonymous
At which time power factor of the induction motor is low?
At which time power factor of the induction motor is low?
Last answer:
The power factor of the inducction motor is low at the time of starting as compare to while the induction motor is running.
time
power
factor
induction
motor
low
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1
answer
asked
Mar 25, 2018
by
anonymous
Power factor of electric bulb is?
Power factor of electric bulb is?
Last answer:
Power factor of electric bulb is unity.
power
factor
electric
bulb
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68
views
1
answer
asked
Mar 25, 2018
by
anonymous
Power factor of an inductive circuit is usually improved by connecting capacitor to it in?
Power factor of an inductive circuit is usually improved by connecting capacitor to it in?
Last answer:
Power factor of an inductive circuit is usually improved by connecting capacitor to it in parallel.
power
factor
inductive
circuit
usually
improved
capacitor
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152
views
1
answer
asked
Mar 24, 2018
by
anonymous
Power factor of an electrical circuit is equal to?
Power factor of an electrical circuit is equal to?
Last answer:
Power factor of an electrical circuit is equal to R/Z, cosine of phase angle difference between current and voltage, kW/kVA.
power
factor
electrical
circuit
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153
views
1
answer
asked
Mar 20, 2018
by
anonymous
Load factor of a power station is generally?
Last answer:
Load factor of a power station is generally less than unity.
load
factor
power
station
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52
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1
answer
asked
Mar 20, 2018
by
anonymous
Load factor of a power station is defined as?
Last answer:
Load factor of a power station is defined as average load/maximum demand.
load
factor
power
station
defined
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87
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1
answer
asked
Apr 29, 2018
by
anonymous
What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016
What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these
Last answer:
What is the power factor when a single phase watt meter operating on 200 V and 5 A for 5 hours makes 2016 revolutions and the meter constant in revolution is 420? A) 0.04 B) 1.04 C) 0.96 D) None of these
power
factor
single
phase
watt
meter
operating
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135
views
1
answer
asked
Mar 25, 2018
by
anonymous
The power factor at resonance in R-L- C parallel circuit is?
The power factor at resonance in R-L- C parallel circuit is?
Last answer:
since a rlc circuit at resonance behaves like a pure resistive circuit, i.e there is no phase difference between current and voltage, hence the power factor is unity.
power
factor
resonance
rlc
parallel
circuit
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228
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2
answers
asked
Mar 21, 2018
by
anonymous
In a single phase power factor meter the phase difference between the currents in the two pressure coils is?
Last answer:
In a single phase power factor meter the phase difference between the currents in the two pressure coils is exactly 90°.
single
phase
power
factor
meter
difference
between
currents
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158
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1
answer
asked
Mar 21, 2018
by
anonymous
In a low power factor wattmeter the compensating coil is connected?
Last answer:
In a low power factor wattmeter the compensating coil is connected in series with pressure coil.
power
factor
wattmeter
compensating
coil
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298
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1
answer
asked
Mar 21, 2018
by
anonymous
In a low power factor wattmeter the pressure coil is connected?
Last answer:
In a low power factor wattmeter the pressure coil is connected to the load side of the current coil.
low
power
factor
wattmeter
pressure
coil
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145
views
1
answer
asked
Mar 20, 2018
by
anonymous
For a consumer the most economical power factor is generally?
Last answer:
For a consumer the most economical power factor is generally 0.95 lagging .
consumer
economical
power
factor
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134
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1
answer
asked
Mar 18, 2018
by
anonymous
The synchronous motor which works on leading power factor and does not drive any mechanical load is called?
The synchronous motor which works on leading power factor and does not drive any mechanical load is called?
Last answer:
The synchronous motor which works on leading power factor and does not drive any mechanical load is called synchronous condenser.
synchronous
motor
leading
power
factor
drive
mechanical
load
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69
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1
answer
asked
Mar 10, 2018
by
anonymous
What is the best power factor?
What is the best power factor?
Last answer:
It is unity power factor but difficult to achieve in dynamic loads
best
power
factor
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75
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1
answer
asked
May 22, 2020
by
anonymous
State the effects of low power factor on efficiency and voltage regulation of short transmission lines.
State the effects of low power factor on efficiency and voltage regulation of short transmission lines.
Last answer:
i) Effect of Low power factor on efficiency:- When power factor of load reduces current drawn by transmission line increases so copper losses in transmission line increases, hence transmission ... increases, so voltage drop in transmission line increases so regulation increases. (Become Poor)
power
factor
short
transmission
lines
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1
answer
asked
May 17, 2020
by
anonymous
Briefly explain how the power factor of an inductive circuit can be improved.
Briefly explain how the power factor of an inductive circuit can be improved.
Last answer:
As we know that power factor should be corrected to ensure that the current supplied is cost friendly. Meaning the power factor should be around one but not greater than one(0.8-0.9) in a ... an inductive circuit due to the inductive reactance which oppose the change of current in the ac circuit.
power
factor
electrical
fundamental
circuit
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1
answer
asked
Sep 6, 2018
by
anonymous
State the significance of power factor.
State the significance of power factor.
Last answer:
Significance of power factor:- 1. Cosine of angle between voltage & current in a circuit is called power factor. 2. It is a measure of the real power in a circuit. 3. Inductive & ... KVA rating equipment 5. Greater conductor size 6. CosØ = R/Z CosØ= Active Power/ Apparent Power
significance
power
factor
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answer
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