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I think the space limitations will throw off most people, you will properly see students in the fields of semiconductors/magnetics win this since you will need some expensive GaN switches to make a transformerless design or some moonmetalwitchcraft hybridtransformer.
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
I believe they're thinking of the PV market where they typically connect the panels in 450V series strings (to avoid the need for said bulky DC-DC) and feed the output back into the grid with an inverter. The contest is all about improving these grid intertied inverters as there is expected to be a huge market for them in future.
The entries aren't required to operate in an intertied mode, but that is just a minor detail in the control circuitry, it doesn't really affect the design of the power electronics.
Not that I'm in the slightest interested in the contest, move along, nothing to see here
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
Artlav wrote ...
240V at 60Hz? South Korea, Philippines, Peru and a bunch of island states. Peculiar choice, to say the least.
Or you know, most of the US/canada/mexico
It is an interesting design challenge, the requirement on THD really does limit you to running a nice GaN device and some nicely optimized magnetics, although I think that modern server power supplies already are at the power density with normal' fets and whatnot (running backwards of course, 240v ac in -> 12v/48v out)
Registered Member #235
Joined: Wed Feb 22 2006, 04:59PM
Location:
Posts: 80
The DC side ripple requirement is harder to meet than the AC THD. The AC THD is 'easy' to fix with high switching frequency to miniaturize the filter components, however the DC ripple is going to need some clever control algorithm.
Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
Yes, and larger appliances like electric stoves and air conditioners often run off the 240V. In other words, even though Americans "use" 120V they still admit that it's a wimpy voltage and useless for serious electrical power.
I thought GaN was best for lower voltage applications. This looks like a job for silicon carbide.
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