On 10/12/24 09:47, Chuck Guzis via cctalk wrote:
On 10/12/24 04:51, hupfadekroua via cctalk wrote:
Hi all,
after approx 30 years of waiting our time has come to get hands on a Cyber
180/860a.
These systems as other systems before are using 400Hz psus.
ISTR that 400Hz 3-phase is required.
The IBM 370/145 had a motor/generator set with a 20 Hp 60Hz
motor and a 17 KVA 400 Hz 120/208 3-phase alternator. This
was massive overkill for the 2.5 KW model 145, so I assume
they used the same MG unit for the 370/158 model.
Good luck finding one of those now!
As for the sensibility of going this way, be sure you have
vast amounts of power available to start such an MG unit.
The phase current in that MG was around 60 A no matter the
load (phase angle changes with load), and the starting surge
was WAY worse.
Jon
