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| === JVB 2018/07/18 agenda === | ## page was renamed from JVB1 === JZB/KHL 2018/08/29 agenda (updated) === |
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| * Linear induction motor - conservative maximum thrust/m^2^ * Inductrack - estimate ultrahigh speed drag/lift ratio |
. 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 |
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| * Launchloop or PowerLoop? * Bolt/Rotor design |
=== KHL intro: === . MSEE UCB 1974 (Josephson Logic) [[ https://doi.org/10.1109/TMAG.1977.1059281| 1977 TMAG paper ]] . Integrated circuits: Tektronix, consulting, two startups . [[ https://standards.ieee.org/findstds/standard/1149.4-2010.html | IEEE 1149.4 ]] analog boundary scan standard . ICUBE routed early internet ("distraction" fail, $e7 → '''-'''$e7 ) . ICID ( $e6 but "shoulda" made RFID a $e10 business, "missed meeting" fail ) . ~20 papers; [[ https://doi.org/10.1109/ISSCC.2000.839821 | 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, [[ http://dirvish.org/ | 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 (vaguely 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 . [[ https://arc.aiaa.org/doi/abs/10.2514/6.1985-1368 | 1985 AIAA conference paper ]], pubs, presentations to space advocacy groups . Independent re-invention by many others since ( ie [[ http://spacecable.org | 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 . [[ VelocityTransformer | 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? * [[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: === * 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? |
JZB/KHL 2018/08/29 agenda (updated)
- 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 ("distraction" fail, $e7 → -$e7 )
- ICID ( $e6 but "shoulda" made RFID a $e10 business, "missed meeting" fail )
~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 (vaguely 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?