#Akio finally built a better #switched-reluctance motor, with laminated stator and rotor, which he got laser-cut from 60 layers of 1mm non-electrical steel for €200, 16 turns of ½mm² copper wire on each of his 12 stator poles. 2000 rpm, 400mA, with no load, 1–2A when stalled with his fingers on the shaft, no torque or power measurements given. #motors #hardware #bootstrapping #DIY
on 02025-06-17#switched-reluctance #motors with schematics. Clarifies that the polarization direction of the rotor doesn’t need to change, which seems like it could eliminate inductive losses in the rotor.
on 02025-06-17#video lecture #toread about #switched-reluctance #motors #hardware
on 02025-06-17#video #toread about #DIY building #switched-reluctance #motors #hardware
on 02025-06-17another #video #toread about #switched-reluctance #motors #hardware
on 02025-06-17#video #toread about magnetic field theory in #switched-reluctance #motors #hardware
on 02025-06-1735-minute lecture (so-called “webinar”) #video #toread about #switched-reluctance #motors design. #hardware
on 02025-06-17#video #toread about #switched-reluctance #motors #hardware, #SynRM demonstration
on 02025-06-17Hour-long #video #toread about #switched-reluctance (?) reluctance synchronous #motors. #hardware
on 02025-06-17Lecture #video #toread about #switched-reluctance (?) reluctance synchronous rotor design. #hardware #motors
on 02025-06-17Lecture #video #toread about #switched-reluctance (?) reluctance synchronous rotor theory. #hardware #motors
on 02025-06-17#video about "SynRM" #switched-reluctance motors made out of sheets with slots punched out to follow field lines. Low-quality AI voiceover from #Lesics. #hardware
on 02024-09-22#video by #Murray-Smith about “game changer?” linear (or rather reciprocating) #switched-reluctance motors (or rather generators). Lots of talking-head filler, but at least a third actual information. But this isn’t actually a switched-reluctance design; it’s a permanent-magnet design! But with both the coil and the ring magnet fixed, coupled by a moving core. He said it took him two hours to make it from scratch, including the wood base I guess, which is sort of a game changer. He gets 600mV open-circuit voltage spinning it by hand and 40mA short-circuit current, so ≤24mW, which makes it less of a game changer since he’s exerting several watts of power to spin the crank. (He claims “It’s generating quite a lot of energy from something so trivial!” but according to his measurements it isn’t.)
on 02024-09-22lecture #video from 02012 (? or 02019?) by JR Hendershot about #switched-reluctance motors (“reluctance synchronous motors”) mentioning ABB’s new #SynRM product line (17–350kW), mentioning higher torque density than induction motors (which use the exact same stator design) and lower cost than permanent-magnet electrical machines as key advantages. Cites a price spike in neodymium as a key reason for interest in the area, which makes me think it’s from 02012 rather than 02019, when it was uploaded to YouTube. It actually says that “reluctance synchronous” motors are different from “switched reluctance” motors. Shows little webs in the stamping to hold the flux carriers together in the transversely laminated anisotropy rotor. Shows ABB’s plot of efficiency over its product line, ranging from 88% at 1kW rated power up to 97.5% at 700kW, because of the missing ohmic losses in the rotor relative to an induction motor. Boglietti and Pastorelli’s paper from 02008 reports 17% higher torque for an SRM (RSM) version of an existing induction motor. Shows some asterisk-shaped switched-reluctance rotors (using higher frequencies) and contrasts with RSMs’ trippy rotor design (using the same inverters as for an induction motor). Also has some nice electronics schematics. “The key to the improvements in efficiency and power factor lies in the inductance ratio or the saliency ratio in the d [direct] & q [quadrature] axes.”
on 02024-09-22#video on very simple single-coil #switched-reluctance motor #hardware. Not optimized; a low efficiency mild steel design, science-fair style. Requires manual start!
on 02024-09-22#video by #Akio showing his Arduino-driven #switched-reluctance motor #electronics control board and working motor #hardware
on 02024-09-22