BLDC and DC motors are identical in physical behavior, as a bldc is just an electronically commutated dc motor. Hence the term BrushLess DC Motor
Am 16. Juli 2025 15:10:08 MESZ schrieb Thaddeus Waldner <thadw...@gmail.com>: >Brushless DC is a misnomer; there is nothing DC about them. They are 3-phase >permanent magnet synchronous motors. It’s just more fun to say BLDC than PMSM, >probably. > >Traditionally these motor types have been vastly different and for different >applications, but modern controllers have blurred the lines between them. >There are still some differences. > >What they all have in common is the “servo” part; an encoder and feedback loop. > >BLDC and stepper motors are synchronous; the controller tracks permanent >magnets on the rotor and produces torque by controlling current to two (2phase >stepper) or three (3phase stepper, BLDC) coils. > >AC induction servos have no permanent magnets. They produce torque by inducing >current into the rotor coils, which are arranged to produce an opposing >magnetic field. > >Functionally, stepper motors are in a different class than the other two >types. They usually have good low-speed torque and limited rpm. Think of them >as a 100-pole motor. The limited RPM also limits the power output in a given >envelope. Usually they can produce about one third to one fourth the power of >a BLDC or AC motor of the same mass. Usually. > >The difference between BLDC and AC servos is more nuanced. BLDC motors tend to >have more torque and better stability at low RPM. AC motors run more >efficiently at high RPM. > > > > > >> On Jul 16, 2025, at 6:56 AM, Stuart Stevenson <stus...@gmail.com> wrote: >> >> What is the difference between: >> >> 1: stepper/servo (Hanpose, et al) >> >> 2: BLDC servo >> >> 3: A/C servo >> >> It seems to me to be describing the same technology. >> >> Thanks >> >> Stuart Stevenson >> 4638 Farmstead Ct >> Bel Aire, Kansas 67220 >> 316 258 0953 >> stus...@gmail.com >> >> -- >> Addressee is the intended audience. >> If you are not the addressee then my consent is not given for you to read >> this email furthermore it is my wish you would close this without saving or >> reading, and cease and desist from saving or opening my private >> correspondence. >> Thank you for honoring my wish. >> >> _______________________________________________ >> Emc-developers mailing list >> Emc-developers@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-developers > > > >_______________________________________________ >Emc-developers mailing list >Emc-developers@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/emc-developers -- Mit freundlichen Grüßen aus Pinneberg Julian Wingert Subtilitas Consulting Holstenstr. 25 25421 Pinneberg Phone: 0170/4516094 FAX: 03212-1479681 Mail: julian.wing...@subtilitas.de USt-IdNr.: DE272503212 _______________________________________________ Emc-developers mailing list Emc-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-developers
