JZB1

JZB/KHL 2018/07/18 agenda

• We will only have time for a subset of the below.
• KHL has hearing and visual problems, F2F required, no webmeetings
• KHL has memory issues, 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, Linux, Dirvish backup software

• Married, no kids, helped wife earn MD instead
• scatterbrained but striving for discipline and rigor

JVB intro:

• I have read your 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

• PlaneLoop, first practical application: rail launch for solar-assist electric aircraft

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

• Why not slow and tall? More subsurface vertical 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

• One or two privately-subsidized foreign students for loop-related work - $/PhD
• Linear PM induction motor - maximum thrust N/m² (Pa)? Linear induction generator, maximum "negative thrust" (power density/velocity)?
• Can an accelerating PM synchronous motor (with "pre-exciter") provide reactive VARs for a linear induction generator?

• Iron nitride earth-abundant supermagnets; grant-mongering B.S. or cheap replacement for Halbach array NIB?

• Programmable motor control integrated circuits: Sensor inputs, Calculation/Communication, Gate driver outputs?

Sources desired:

• Practical/empirical motor design books with complete models, simulated (and measured?)
  • detailed examples with theory/math AND parameter characterization:
    • iron saturation, heat, breakout torque, tolerances
  • how does abstract design translate to actual motors and generators?
  • What fails? What is inaccurate or misleading in typical designs?
• 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
• 3D Motor FEM modelling? Open source or Linux Compatible strongly preferred

JVB PSU research

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