A courtesy contact is expected for re-publication of any of these images. The images contained in this page are all magnetic micro motors which were fabricated using deep x-ray lithography and electroplating. Most of the motors are electroplated 78-22 permalloy and use either integrated or externally wound and assembled micro coils. Rotor speeds vary from a few thousand rpm to a few hundred thousand rpm. Rotor tip forces are in the millinewton range and have been achieved at milliWatt powers.
Gear trains deliver the usefull work away from the rotor to power other devices.
See the publication archive for more information. MicroDynamometer Microdynamometer containing a drive gear, idle gear, and breaking gear. This motor has been operated to 10,000rpm with powers less than a milliwatt and drive currents of 5 mA. The breaking gear is the feedback system to determine how much force the motor applies. Externally wound coils power the motor, as opposed to integrated coils, enabling the low power requirement. Microdynamometer with integrated coils and composite permalloy and PMMA rotor and gears.