What is the use of AC and DC drives?

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asked Mar 10, 2018 by anonymous

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What is the difference between an AC and DC generator?

Last answer: The generator which generates DC voltage is called DC generator and generator which generates AC voltage is called AC generator (or) Alternator. In DC generator armature is rotated and field winding ... generator. A DC generator can generate low voltages but an AC generator can generate upto 11kv.

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Why do we use AC current in our homes?

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What is the advantage of AC over DC electrical transmission?

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asked Aug 15, 2019 by anonymous

What is the conversion between. AC to AC ? DC to DC? AC to DC? DC to AC ?

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asked Aug 28, 2019 by anonymous

Which is more dangerous AC or DC and why ?

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asked Apr 29, 2018 by anonymous

Which of the following motors can run on both AC and DC?

Which of the following motors can run on both AC and DC? A) Universal motor B) Dual wattage motor C) Flexible motor D) All the above

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asked Sep 3, 2019 by anonymous

Why are DC motors used in trains and not AC motors ?

Last answer: The reason is torque. torque is inversely proportional to speed..i.e when th knowe train comes to rest position to motion.. initial speed is zero..so it requires high starting torque for ... current will flow through field and armature coils then maximum torque is available at the intial condition.

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asked Aug 8, 2018 by anonymous

Distinguish between AC and DC.

Last answer: Particulars Direct Current Alternating Current Definition It is the current whose magnitude and direction do not change with respect to time. It is the current whose ... system, electroplating, Battery charging, Traction. AC machines, Domestic and industrial supply.

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asked Oct 18, 2017 by anonymous

are AC and DC resistances same?

Last answer: Resistance is the ability of a circuit or element (which is called resistor) to oppose current. Examples of Resistors with the ability of high resistance are Wood, Air, Mica, Glass, Rubber, Tungsten ... constant. Therefore, only the original resistance of wire comes into play. they are not the same

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Csi fed ac drives

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asked May 8, 2018 by anonymous

The main advantage of AC over DC is:

The main advantage of AC over DC is: (A) Conversion flexibility from one voltage level to other (B) AC can be easily converted into DC by using a rectifier (C) AC is easy to maintain & can be easily distributed at long distances (D) All of the above

Last answer: Ac is easy to maintain and ac can be easily converted to dc by rectifier .There is no commutator for conversion in ac that's why ac machines are weight less and more efficiency.ac machines occupy less space than dc .

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asked Jun 29, 2019 by anonymous

Is the power line voltage available in our homes a dc or an ac voltage?

Last answer: The power line voltage available in our homes is AC. Mobile dwellings are the most commonly DC-supplied homes and even then they tend to include AC supply for heavier loads.

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asked Mar 10, 2018 by anonymous

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Last answer: Obviously its A.C

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asked Aug 28, 2019 by anonymous

Why is AC considered more efficient than DC?

Last answer: Ac is more efficient than dc because it is easy to maintain and change the voltage of ac for transmission and distribution purpose. Plant cost of ac transmission is much lower compared to dc transmission. When fault occurs it is easy to interrupt ac supply.

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asked Aug 11, 2018 by nbattack

is it DC better than AC to transmit? explain it.

Do you think is DC better than AC to transmit energy?

Last answer: In Long distance DC transmission will be better in cost. It requires more equipments for flexiblity In short distance AC transmission is better in cost. It is more Flexible

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How is a thyristor used to convert AC to DC?

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Is current from a battery AC or DC?

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Is electricity generated in AC or DC?

Last answer: Electricity is generated in AC.

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is induction motor ac or dc?

Last answer: Induction motor is a AC motor it is also known as asynchronous motor .

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asked May 7, 2020 by anonymous

State the modification to be done in dc series motor to work satisfactorily as ac series motor. State applications of ac series motor.

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How IGBT convert DC into AC in solar inverter?

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Can transformer convert AC to DC?

Last answer: No, Transformer cannot convert AC to DC.

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can rectifier convert dc to ac?

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asked Sep 13, 2017 by anonymous

how does rectifier convert ac to dc?

Last answer: IT CHANGES NEGATIVE CYCLE IN TO POSITIVE CYCLE FROM AC CURRENT.

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asked Dec 16, 2017 by anonymous

What is the use of an electric motor?

Last answer: Electrical motors are use for converting electrical energy to mechanical energy. It may be use in fans, pumps, washing machine, cranes, trains, factories, industries etc.

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asked Mar 21, 2018 by anonymous

The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a?

Last answer: The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a two-phase winding.

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asked Jul 30, 2019 by anonymous

What are the factors to be considered while selection of motors for different drives?

Last answer: Following Factors are considered while selecting electric drive (Motor) for particular application: Factors to be considered for selection of Electrical Drives: 1) Nature of Supply:- Whether supply ... , load equalization 7) Cost: - Capital, Running and maintenance cost should be less.

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Explain different gate drives techniques with base circuits and key features.

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asked Aug 17, 2019 by anonymous

With proper reason suggest type of enclosure for electric drives used in coal mines.

Last answer: Flame-proof type of enclosure for electric drives is used in coal mines. Reason: - Coal mines are very hazardous, prone to flame and explosions. Under such conditions, flame proof type ... them (due to arcs, sparks, or flashes) without igniting the surrounding flammable gases or vapors.

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asked Aug 17, 2019 by anonymous

State types of enclosures of electric drives.

Last answer: Types of enclosures of Electric Drives: 1) Screen protected 2) Open type 3) Protected type 4) Totally enclosed 5) Drip-proof type 6) Pipe ventilated type 7) Flame proof type 8) Explosion proof 9) Splash proof.

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asked Jun 22, 2018 by Erdemuysal

What are the advantages of the use of frequency converter instead of star-delta or soft starter?

Can you guys explain the advantages of frequency converter against the star delta or soft starter?

Last answer: ¬Soft starters A soft starter is, as you would expect, a device which ensures a soft starting of a motor. A softstarter has different characteristics to the other starting ... at rated current from zero to full speed. Frequency converters are becoming cheaper all the time.

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354 views 1 answer

asked Mar 25, 2018 by anonymous

All the rules and laws of D.C. circuit also apply to A.C. circuit containing?

Last answer: All the rules and laws of D.C. circuit also apply to A.C. circuit containing resistance only.

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149 views 1 answer

asked Jun 29, 2019 by anonymous

Describe the difference between direct and alternating current.

Last answer: Direct current is the flow of electricity or charge in one direction.. Alternative current is the flow of charge that doesn't flow in one direction.

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asked Mar 20, 2018 by anonymous

If a D.C. motor is connected across the A.C. supply it will?

Last answer: If a D.C. motor is connected across the A.C. supply it will burn due to heat produced in the field winding by eddy currents.

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75 views 1 answer

asked Apr 29, 2018 by anonymous

An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic

An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be (1) unaffected (2) decreased (3) increased (4) either decreased or increased depending on the direction of the DC field

Last answer: An unshielded moving iron voltmeter is used to measure the voltage in an AC circuit. The stray DC magnetic field having a component along the axis will be either decreased or increased depending on the direction of the DC field

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263 views 1 answer

asked Mar 20, 2018 by anonymous

If a D.C. series motor is operated on A.C. supply, it will?

Last answer: If a D.C. series motor is operated on A.C. supply, it will spark excessively, have poor efficiency, have poor power factor.

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63 views 1 answer

asked Aug 25, 2019 by anonymous

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.

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166 views 4 answers

asked Sep 4, 2018 by anonymous

State any four advantages of A. C. over D. C .

Last answer: .embed-container { position: relative; padding-bottom: 56.25%; height: 0; overflow: hidden; max-width: 100%; } .embed-container iframe, .embed-container object, .embed-container embed { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }

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90 views 2 answers

asked Aug 19, 2019 by anonymous

Why can't we store AC in batteries instead of DC ?

Last answer: Because the direction of the current changes in AC electricity, you cannot directly store the power. Placing a capacitor in an AC circuit has no effect on the alternating flow of the electricity. The only ... is indirectly, by storing DC and then using a power inverter to convert the DC to AC.

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asked Aug 8, 2019 by anonymous

Changeover from D.C to A.C

Last answer: In later half of eighties, in nineteenth century, it was proposed to have a power system with 3- phase, 50 Hz A.C generation, transmission and distribution networks. Once a.c system was adopted, transmission of ... favor of A.C supply system own the debate on switching over from D.C to A.C system.

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asked Mar 20, 2018 by anonymous

A.C. series motor as compared to D.C. series motor has?

Last answer: A.C. series motor as compared to D.C. series motor has smaller brush width, less number of field turns, more number of armature turns, less air gap.

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69 views 1 answer

asked Aug 18, 2019 by anonymous

What would happen if a DC motor was supplied with AC ?

Last answer: With three phase induction motor, humming and not rotate, but if single phase universal motor like air blower, home mixture, motor run on constant speed..speed variation not possible...

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asked May 15, 2020 by anonymous

What is the use of transformer?

Last answer: The use of transformer is to do lower or raise the voltage or currents in an electrical circuit. That's quite so simple.

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asked Mar 22, 2018 by anonymous

What is the use of diode in the circuit?

Last answer: Diode is a device which allows the flow of current in one direction and blocks the current in opposite direction.

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What is the use of a thyristor in a circuit?

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What is the use of AC and DC drives?

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