ATLAS TOROID SNUBBER A PROTOTYPE Michela Neroni 15102020

ATLAS TOROID SNUBBER – A PROTOTYPE Michela Neroni 15/10/2020

1 – Atlas Toroid snubber prototype schematic 15/10/2020 Michela Neroni EP-ADO-SO 2

2 – An idea for the snubbler structure Electrical cables and lugs - Available HOMOGENEOUS WEIGHT DISTRIBUTION: Total weight= 19 kg+ 2. 8 kg + 12 kg = 33. 8 kg Bolts and terminals available 19 kg 695 mm Breaker unit 12 kg + diode 1. 4 kg 77 mm Copper strips Aluminium base sheet 5 mm thick – Maximum weight ~ 50 kg 485 mm 15/10/2020 Michela Neroni EP-ADO-SO 3

3 – 3 D vision Coil DC Contactor Diodes sis Re tor h itc Sw 15/10/2020 Michela Neroni EP-ADO-SO 4

4– Weekly progress – copper strips Cutting and drilling of the copper strips M 5 – dimension of capacitors bolts holes 15/10/2020 Michela Neroni EP-ADO-SO 5

4– Weekly progress - diode Reuse of the diode contact mechanism, reducing size 15/10/2020 Michela Neroni EP-ADO-SO 6

4– Weekly progress - diode Gain in space 2 diodes in the same structure, square G 10 for insulating New copper disk for contacts, square copper 15/10/2020 Michela Neroni EP-ADO-SO 7

5– Clamping force From ABB diode datasheet: F 1 15/10/2020 F F 2 Michela Neroni EP-ADO-SO 8

6– Wiring DC contactor Supply voltage 100 -250 V 50 -60 Hz + - -Snubber diode -Power supply A 1 A 2 -Lparasitic, Rparasitic, diode in series -Cryolab coil -Snubber capacity output 15/10/2020 Michela Neroni EP-ADO-SO 9