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"Answer and Earn 6.4 credits to you account" What would happen on the load designed for DC if supplied the same AC charge.

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Question ajoutée par Agaba godrick
Date de publication: 2014/05/05
Rehan Qureshi
par Rehan Qureshi , Financial Consultant , Self Employeed

I have no idea

sohail zaman
par sohail zaman , Engineer - Instrumentation and Automation , National Petroleum Services Co.

it at the resistive it will be no prblem  and doesn't matter for some equipment, other types of equipment will be

destroyed. For a simple electric heater or an incandescent bulb AC or DC are

 

acceptable, provided the rms(root means square) voltage of the AC is equal to the DC voltage. If

the heater has a time switch, DC is unacceptable. A DC motor may or may not

work with AC depending on its type and size. The commutator  motor as used in

vacuum cleaners is essentially a DC motor, but most types of AC motor are not

interchangeable to DC. Electronic circuits usually required a DC supply and if

 

AC is applied many of the components will be destroyed.

Ziad Azzawy
par Ziad Azzawy , CHIEF ENGINEER , GOV.

There is three types of load( resistive , capacitive & inductive ) the first one can hold ac ( but with0.7 of its power) becuse it doesnt depend on frequency  capacitive & inductive loads depend on frequency in dc its value zero (impeadance to low in inductive to hi in capactive) .

dinesh kumargowd
par dinesh kumargowd , PROJECT ENGINEER , ENGINEERING MAINTENANCE COMPANY LLC

let us consider some dc loads

dc motor

dc relay

dc led...etc

we will discuss one by one about giving ac supply to the above said dc loads

1. dc motors of several types among them 

let us talk about shunt and series motors. if we give ac supply to the dc shunt motor the rotor will be locked by produsing clock and anti clock wise torques, but it draws more current and gets heated up

in the case of dc series motor the construction is like as universal motor therefor the dc series motor rotates when we give ac supply

2. if we give ac supply to dc ralay the coil will get energized and it will works as usual

3. leds and incandicent lamps will normally works on both ac and dc

therefore we can conclude that most of the loads designed for dc will work on ac, but there will be slight variation in current consumed by them.      only few dc loads won't work on ac  

 

Ahmed Hegazy
par Ahmed Hegazy , Director of Projects , Saudi Egyption Tourism Development Company

It will work without any bad effect for the linear loads but for the non linear loads it will not work

elsayed mohamed yousif
par elsayed mohamed yousif , Sales and technical support engineer , Electrical Lighting Co L.LC, Dubai, United Arab Emirates

Will work only with the positive value of the supplied AC and will ignore the negative.

Menerva Melad
par Menerva Melad , Account Executive, Key Accounts , Graphic Home Company

it at the resistive it will be no prblem  and doesn't matter for some equipment, other types of equipment will be

 

destroyed. For a simple electric heater or an incandescent bulb AC or DC are

 

 

acceptable, provided the rms(root means square) voltage of the AC is equal to the DC voltage

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