Control Data 841 disk drive's 3-phase power supply resurrection

Chuck Guzis cclist at
Sun Feb 18 18:07:51 CST 2018

On 02/18/2018 03:14 PM, Al Kossow via cctalk wrote:
> On 2/18/18 9:34 AM, P Gebhardt via cctalk wrote:
>> As far as I know, some computer installations used 400Hz 3-phase
>> back in the days. Does anybody know, if that is the case for this
>> type of drive systems?
> Looking at the manuals, it is 3-phase 50Hz, with the phases split
> between different parts of the drive.
Generally, the electromechanical stuff (motors) was run from 208V
3-phase and often, the electronics from 400Hz.

At least that's what I recall.


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