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| . PowerLoop, first practical application: MWhr power storage (can scale beyond TWhr) . Why not slow and tall? More vertical deflection height, less effective, vulnerable to space debris |
. 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 |
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| === Questions: === | === 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? * [[http://license.umn.edu/technologies/20120016_iron-nitride-permanent-magnet-alternative-to-rare-earth-and-neodymium-magnets | 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: === |
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| * Linear induction motor - conservative maximum thrust N/m^2^ ← Rotary torque / ( 2 π w r² ) | |
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| * 200 kN induction motor --- how long, how stable? * 3D Motor FEM modelling? * [[http://license.umn.edu/technologies/20120016_iron-nitride-permanent-magnet-alternative-to-rare-earth-and-neodymium-magnets | Iron nitride ]] earth-abundant supermagnets; grant-mongering B.S. or cheap replacement for Halbach array NIB? |
* 3D Motor FEM modelling? Open source or Linux Compatible strongly preferred |
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| . would older Tektronix test equipment help you or students? | . would older Tektronix lab equipment help you or students? |
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?
- detailed examples with theory/math AND parameter characterization:
- 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?