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From: KevinJ93 <kevin_es@whitedigs.com>
Newsgroups: sci.electronics.design
Subject: Re: The Spanish Grid Drop-out - recently released information.
Date: Fri, 16 May 2025 19:15:29 -0700
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On 5/15/25 11:23 PM, Liz Tuddenham wrote:
> Bill Sloman <bill.sloman@ieee.org> wrote:
> 
>> On 16/05/2025 3:51 am, john larkin wrote:
>>> On Thu, 15 May 2025 12:37:24 +0200, "Carlos E.R."
>>> <robin_listas@es.invalid> wrote:
>>>
>>>> On 2025-05-15 08:18, Bill Sloman wrote:
>>>>> On 15/05/2025 5:14 am, Carlos E.R. wrote:
>>>>>> On 2025-05-14 16:16, Glen Walpert wrote:
>>>>>>> On Tue, 13 May 2025 07:50:36 -0700, Don Y wrote:
>>>>>>>
>>>>>>>> On 5/13/2025 6:26 AM, Glen Walpert wrote:
>>
>>>> Another very wild idea was increasing the frequency to around 600Hz. It
>>>> would make transformers and all coiled things smaller. Planes do this.
>>>> Possibly would also radiate more. And would not help with control.
>>>
>>> But our clocks would run ten times faster.
>>>
>>> And everything would hum.
>>
>> This doesn't happen in aircraft.
> 
> The ambient noise level in an aeroplane is much higher than in a house
> on a quiet night. (Also, look up Fletcher-Munson curves to see why 600
> c/s would be a lot worse than 50 or 60 c/s.)
> 
> Alternators for 600 c/s are feasible at a few kW in aircraft but they
> are difficult to scale up to power station size.
> 

A modern large aircraft may have close to a megawatt of generation capacity.

> Another problem with large-scale distribution at 600 c/s would be the
> inductive reactance of cross-country power lines and the need for
> special alloys and thin laminations to reduce core-losses in
> transformers.
> 
>