asteroza + magnet   73

Home - Linear Labs
Interesting design features, with no gear reduction box (so effectively no transmission) due to various tricks.
3D  circumferential  flux  exterior  permanent  magnet  electric  motor  magnetic  torque  tunnel  research  technology 
11 days ago by asteroza
Princeton Satellite Systems | Satellites and Beyond
New fusion propulsion design that makes power and propulsion at the same time, but requires He3? If nothing else, they want to demo a brayton cycle turbine power setup on ISS.
direct  fusion  drive  space  propulsion  plasma  research  technology  mirror  magnet  power  generator  FRC 
september 2018 by asteroza
A multicaloric cooling cycle that exploits thermal hysteresis | Nature Materials
Uses a ring of shape memory alloy, and magnets plus compression rollers to enable a 6 stage cooling system.
shape  memory  metal  alloy  giant  magnetocaloric  refridgeration  cooling  materials  science  research  technology  permanent  magnet 
september 2018 by asteroza
Altius Space Machines Selected for 2 NASA SBIR Phase 1 Awards – Parabolic Arc
MagTag could be the new lego for cubesats to heterogeneously recombine based on work objective.
MagTag  electropermanent  magnet  EPM  newspace  satellite  bus  modular  block  interface  space  research  technology 
june 2018 by asteroza
Correlated Magnetics
going beyond the design for halbach arrays, custom magnetic fields that create latching/alignment movement along with pushback
programmable  magnet  polymagnet  latch  mount  magnetic  alignment  smart 
june 2017 by asteroza
CAS技術の進化 | ABI 株式会社アビー
Freezer using high powered magnets to vibrate water in cells which are supercooled, keeping them liquid. Drop the magnetic field, and the water flash freezes with low crystallization, reducing damage to cells. Good for stem cell freezing, and also makes frozen food taste less mushy because the cells aren't destroyed.
stem  cell  freezing  freezer  refridgerator  flash  frozen  magnet  supercooled  water  japan  Delicious 
august 2016 by asteroza
PEPL: Thrusters: CubeSat Ambipolar Thruster
Cubesat thruster based on a baby VASIMR using a permanent magnet helicon setup.
cat  technology  plasma  engine  ambipolar  space  research  propulsion  helicon  compact  VASIMR  permanent  thruster  magnet  cubesat  Delicious 
july 2013 by asteroza
Hitachi Drives PM Motor at Low Speed Without Position Sensor -- Tech-On!
Interesting trick of measuring coil inductance via electromotive voltage change to detect permanent magnet rotor position in a BLDC motor without a dedicated position sensor.
rotor  position  control  monitoring  speed  DC  sensorless  BLDC  brushless  detection  permanent  voltage  inductance  low  magnet  Delicious 
april 2013 by asteroza
Boulder Wind Power
Uses an oddball printed circuit board (PCB) based design for a super lightweight (fixed?) stator for the generator (I think the permanent magnet mounted rotor is the outer part of the torus). Definitely a weird direct drive permanent magnet configuration.
core  air  gap  axial  magnet  permanent  drive  direct  research  design  motor  energy  green  generator  power  turbine  wind  stator  PCB  lightweight  Delicious 
december 2012 by asteroza
Fraunhofer Announces New Wireless Power Transmission Technology -- Tech-On!
Some kind of bizarre wide gap motor/transmission setup utilizing magnetic resonance coupling to physically rotate a remote magnet. I wonder if you could embed this technique in a vacuum flywheel to avoid a rotating shaft seal?
Fraunhofer  wireless  power  transmission  mechanical  magnet  rotation  magnetic  resonance  coupling  Delicious 
april 2012 by asteroza
Welcome to Equipmake
Apparently patented a new spoke magnet motor that is 50% of the volume and 80% of the mass of conventional motors with superior hub/rotor cooling, and can get to 9kW/kg for amazing power density (Launchpoint was in the 5 range). Also involved in making a microturbine range extender connected power generator for a supercar.
EV  microturbine  long  range  extender  power  generator  green  transportation  automotive  research  electric  motor  spoke  magnet 
september 2011 by asteroza
ABI - 株式会社アビー
apparently they have a magnet system that directly stimulates water in cells to prevent ice crystal formation when supercooling, which is then suddenly turned off to create a flash freezing effect that reduces damage to food/tissue/meat from the freezing process.
japan  ICE  crystal  free  magnetic  Water  molecule  stimulation  flash  freezing  technology  food  tissue  meat  cell  preservation  CAS  magnet  formation  suppression  colling  Delicious 
january 2011 by asteroza
The next generation of superconducting magnets are here....
It's kinda hard to call a superconducting magnet permanent. But this is an interesting technique for "charging" a superconducting magnet.
Magnifye  Fluxpump  superconductor  rare  earth  metal  permanent  magnet  superconducting  motor  materials  science  research  technology  heat  magnetic  flux  pump  travelling  wave  Delicious 
november 2010 by asteroza
Magnetal - Advanced Technology for Magnetic Bearings
Interesting, but a little sketchy. It seems to be a properly integrated Halbach array magnet being using for magnetic levitation in a bearing, with some self correcting fores that are useful, but aren't Halbach arrays by definition a drag device that has to be overcome by other forces? Can the drag really be superior to classical magnetic bearings? Or perhaps not, but simplicity of manufacturing means it may be the cheaper choice in the realm of magnetic bearings. But maximum bearing force capacity (lift capability of a Halbach array) is kinda limited usually, right?
HEDB  homopolar  electrodynamic  bearing  passive  high  speed  magnetic  flywheel  support  energy  storage  Halbach  array  magnet  levitation  Delicious 
november 2010 by asteroza
"Wind Lens" Turbines Could Boost Energy Generation 3X | Inhabitat - Green Design Will Save the World
The implication here is that at larger sizes, it may be advantageous to integrate the generator directly into the rim diffuser structure, probably as a permanent magnet, transforming it into a hubless turbine type.
wind  lens  brimmed  diffuser  turbine  power  generator  green  energy  rim  drive  permanent  magnet  hubless  Delicious 
august 2010 by asteroza
Introducing the Honeywell Wind Turbine from WindTronics
Apparently, because it uses a tip ring rotor as the generator, it runs on even light puffs of wind.
gearless  permanent  magnet  hubless  wind  turbine  power  generator  green  energy  small  form  factor  hardware  electronics  devices  home  house  Honeywell  Delicious 
august 2010 by asteroza
Höganäs - Metal powder, iron powder, nickel powder, stainless powder
Interesting pressed powder manufacturing technique allows complex 3D magnet shapes for improved motor design and performance, at least at small field strengths and sizes.
Höganäs  moulded  soft  magnetic  composite  SMC  3D  pressed  iron  powder  permanent  magnet  electric  motor  Delicious 
may 2010 by asteroza
New Hybrid Field Motor Uses Less Rare Earth Material -- Tech-On!
Trying to get some of the features of a permanent magnet motor with less rare earth metals used, the japanese come up with a newer hybrid type motor, which uses a moldable soft magnetic composite to make a complex shaped permanent magnet for improved performance.
hybrid  field  electric  motor  soft  magnetic  composite  moldable  magnet  3D  shape  manufacturing  permanent  electromagnet  Delicious 
april 2010 by asteroza
LCE - Linear combustion engine project:
I wonder if a switched reluctance generator style is fundamentally compatible with a magnetic linear generator.
Czech  EU  europe  linear  free  piston  engine  power  generator  green  energy  magnet  magnetic  Delicious 
march 2010 by asteroza
Levitating Magnet May Yield New Approach To Clean Energy
I'm a little stumped as to how the floating magnet is supposed to control things when it is floating via a rather large externally applied magnetic field. I guess there must be some field orientation advantage compared to simply applying a larger field from outside. I wonder if this could be applied to SMES or other cryogenic systems to remove the supports that contribute to heat leakage?
levitation  levitating  floating  magnet  superconductor  superconducting  turbulence  turbulent  plasma  pinch  fusion  experiment  energy  research  heat  leakage  control  Delicious 
february 2010 by asteroza
SR Motor Made Small Enough for Hybrid Cars -- Tech-On!
Japanese research somewhat perfects a switched reluctance (SR) electric motor that uses no permanent magnets, yet has equivalent performance in a similar form factor.
japan  electronics  hardware  devices  materials  science  research  technology  switched  reluctance  SR  electric  motor  vehicle  transportation  green  energy  rare-earth  permanent  magnet  small  form  factor  Delicious 
january 2010 by asteroza
Magnifye Limited
Using a temperature controlled permeability magnetic screen, these guys are charging a superconducting magnet little by little to large levels (17T?). Possible interesting usages provided you don't care about flux line penetrating the bulk magnet
Magnifye  UK  EU  europe  superconductor  superconducting  bulk  permanent  magnet  magnetization  charging  materials  science  research  technology  heat  flux  pump  Delicious 
october 2009 by asteroza
The Beginning Of The End For Rare Earth Permanent Magnet Motors? | Terra Magnetica
Couple this unconventional surface mating with software controlled coils, and maybe mix in that new coded magnet research, and we might have a winner here...
Iron  ferrite  permanent  magnet  motor  research  japan  electronics  hardware  devices  propulsion  Delicious 
october 2009 by asteroza
Coded Programmable Magnets
coded magnets that have attraction peaks only in certain orientations, allowing magnetic fasteners that can be twisted free but could otherwise hold large weights...
coded  programmable  magnet  materials  science  research  technology  controllable  fastner  magnetism  Delicious 
october 2009 by asteroza

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