JZB1

JVB/KHL 2018/07/18 agenda

• We will only have time for a subset of the below.
• KHL has hearing and visual problems, F2F required.
• KHL also developing memory problems, will make lots of notes
• can sign NDA, but prefer to avoid

KHL intro:

• MSEE UCB 1974 (Josephson Logic) 1977 TMAG paper

• Integrated circuits: Tektronix, consulting, two startups

• IEEE 1149.4 analog boundary scan standard

• ICUBE routed early internet (failed after $e7 → -$e7 )

• ICID ( $e6 but "shoulda" made RFID a $e10 business )

• ~20 papers; 1 with Rob Daasch that founded new field (300? citations)

• ~12 patents incl. foreign (dislike, but protects customers from copycat trolls)

• Open source software: BSD Y2K patch, Dirvish backup software

• Married, no kids, helped wife earn MD instead

JVB intro:

• CV and recent papers on Halbach wheels (resembles launchloop velocity transformer)
• Spacegrant for EM launch?

• What do you wish you had time to work on?

• Other

Launchloop:

• active "hobby" 1980 to 1988, completing work now

• 1985 AIAA conference paper, pubs, presentations to space advocacy groups

• Independent re-invention by many others since ( ie John Knapman PhD in UK)

• Two research groups currently active, one with >$1M funding + 4 professionals

• PowerLoop, first practical application: MWhr power storage (can scale beyond TWhr)

• Why not slow and tall? More deflection, less effective, vulnerable to space debris

Bolt/Rotor design

• deflection at ends
• ≈ 4 kg/m, 3 cm cross section

• velocity transformer track: air core flat windings, diamagnetic spacing stabilization? Hands waving madly

  • High inertia <- Halbach DC Motor <- Induction generator

Questions:

• Practical/empirical motor design books (theory/math AND detailed measurement)

• Linear induction motor - conservative maximum thrust N/m² ← Rotary torque / ( 2 π w r² )

• Inductrack - estimate ultrahigh speed drag/lift ratio (skin effect)

  • Power = radians × ρ × v³ / LD ( LD must be >> 1e5 )

  • predictive/adaptive electronic control instead: global stability, loop gain, computation, and redundancy
• 200 kN induction motor --- how long, how stable?
• 3D Motor FEM modelling?

JVB PSU research

• what help do you need?
• would older Tektronix test equipment help you or students?