#GreatScott #video on #FOC #control #electronics for #brushless #motors #toread
on 02026-08-25#C-motive's electrostatic PCB #motors use 2kV and an organic dielectric with a relative permittivity “in the low 20s”, and they’re testing a 750-watt follow-on to their working 300-watt prototype (#news as od 02024-08-18)
on 02026-03-18#video on making #precision #actuators from cheap stepper #motors instead of US$1 hobby servos to position an array of mirrors to paint light on a wall. Actually he just bought 40¢ stepper-based linear actuators off AliExpress, apparently leftover parts from obsolete cellphones, which turned out to move about 3.2μm per step; he reflow-soldered their flat-flex cables onto custom breakout boards with solder paste and a heat gun. Lacking closed-loop control, he homes the actuators by overdriving them in one direction plus about 200 steps, which stalls the motor but not for long enough to damage it. #hardware #electronics
on 02026-01-13#video on axial-flux PCB #motors. Mostly stock footage.
on 02025-11-25#Sanladerer #video on why #3D-printing still uses stepper #motors #toread
on 02025-11-11#GreatScott #video on controlling #motors with encoders
on 02025-11-11#Thisismax #video on sensorless #FOC #control of #hardware #motors, using the most hilarious Nerf launcher I’ve ever seen, using three Kv = 2200 drone motors (minimum 10krpm) as rollers to launch the balls in a curved trajectory by controlling their spin. He wanted to use STMicroelectronics’s “#STM32 MC Motor Profiler”, but that would have required using Microsoft Windows, so he used the Arduino #SimpleFOC library instead. He gets motor position feedback from the back EMF of the motor windings (I’m not sure if this is inherent to “FOC”). He says most small drone motors are Y-topology. #electronics
on 02025-11-11#video on new axial-flux high-power-density #motors #toread
on 02025-11-03#video about controlling #motors with #FOC (field-oriented control) and using them as dials. Using SimpleFOCproject to do PWM microstepping of #brushless motors to get smooth motion down to zero velocity? Also steppers. The BLDCMotor constructor argument is the number of pole pairs, which he got wrong at first. But he’s cheating by using an AS5600 I²C magnetic encoder! This has the very interesting #UX idea of simulating mechanical detents by using the motor for haptic feedback on a knob. #electronics
on 02025-10-17#video #toread on using stepper #motors instead of #brushless motors for #3D-printing
on 02025-10-16#video on designing “Static Core” #motors for easy #integration into #mechanisms by making them in the form factor of a pulley, so you don’t need to mount it on the opposite side of a mounting plate from whatever you want to drive, then use a shaft coupler to couple it to another shaft that’s supported on two bearings. Basically the idea is to not have a shaft but just spin the (permanent magnet, so no wires) brushless motor housing, with a timing pulley built onto it. But he didn’t gear the “frameless” motor down enough so his robot can’t overcome static friction to start.
on 02025-10-16#video on "C-Motive" electrostatic 1-horsepower #motors with a rotor made from 13 layers of PCBs with many poles, insulated with a dielectric fluid. For high-torque industrial applications like running conveyor belts.
on 02025-08-06#Chronova hand #manufacturing an electric motor whose shaft is 90μm across, like William McLellan’s answer to Feynman’s “Lots of Room” challenge. It’s a permanent-magnet rotor nestled in between four straight electromagnets wound with 20μm wire. He kept losing parts. He spent several months on it. His soft iron rotors had coercivity that was too low, and #machining alnico on his lathe turned out to be impossible until he used grinding wheels. He finally gave up and just floated the alnico disc in watch oil on the other side of a cover slip. He got an electromicrograph. #small #motors #hardware
on 02025-06-17#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 02025-06-17advice on #H-bridge #hardware for driving #motors with N-channel MOSFETs
on 02017-05-19Yet more on #H-bridge #hardware for driving #motors #toread
on 02017-05-19Still more on #H-bridge #hardware for driving #motors #toread
on 02017-05-19More on #H-bridge #hardware for driving #motors #toread
on 02017-05-19#Introduction to #H-bridge #hardware for driving #motors #toread
on 02017-05-19on designing #H-bridge #hardware to drive #motors #toread
on 02017-05-19Another ST #appnote #PDF on driving stepper #motors. #hardware
on 02017-05-19#Introduction #appnote #PDF on driving stepper #motors from NXP/Philips #hardware
on 02017-05-19Atmel #appnote #PDF on driving stepper #motors with an #AVR
on 02017-05-19#appnote #PDF on driving stepper #motors from ST (SGS-Thomson). #hardware
on 02017-05-19Microchip #appnote #PDF on driving stepper #motors, especially with a #PIC. #hardware
on 02017-05-19#PDF catalog of small #motors from Kysan, with Mabuchi-compatible part numbering conveniently included.
on 02017-03-11You can indeed control stepper #motors from a StarTech PCIe parallel port adaptor card under LinuxCNC with EPP mode. #hardware #cnc #machining
on 02016-05-06