Welcome to EDAboard.com

Welcome to our site! EDAboard.com is an international Electronic Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.

Register Log in

différence between AC and DC

Status
Not open for further replies.

ohm77

Newbie level 4
Joined
Aug 9, 2012
Messages
6
Helped
0
Reputation
0
Reaction score
0
Trophy points
1,281
Location
montreal,canada
Activity points
1,327
Hi everybody,
Could you give me an answer for this question: Why direct current (DC) can be stored but alternating current(AC) can not be?
thank you
 

BradtheRad

Super Moderator
Staff member
Joined
Apr 1, 2011
Messages
13,814
Helped
2,738
Reputation
5,473
Reaction score
2,648
Trophy points
1,393
Location
Minneapolis, Minnesota, USA
Activity points
103,109
AC needs to be generated on the spot.

If the AC is to continue being AC, then it needs to be stored in the form of something rotating, or swinging, or oscillating, etc.

The closest thing to storing AC is an LC tank loop made from a coil and capacitor. It can be made to oscillate on its own with no input of energy, for a while. Eventually it decays. At a temperature of absolute zero, it might go on for a much longer time.

If a magnetic field could be made to self-sustain in an oscillating form, that would be sort of like storing AC, except it would be a case of converting it, not storing it directly. I've never heard of a self-sustaining magnetic field, however.

A generator in conjunction with a flywheel or spring might be similar to storing AC, but that will decay.
 
  • Like
Reactions: ohm77

    ohm77

    points: 2
    Helpful Answer Positive Rating
Status
Not open for further replies.

Part and Inventory Search

Welcome to EDABoard.com

Sponsor

Top