This is correct to some degree. A motor controller wouldn’t need need the dc-dc controller, isolation transformer, and output diodes and filters, which accounts for about half of the space to my reckoning.
Also, high voltage, low amperage motor controllers are usually more compact than their low voltage counterparts. For example, you can buy a 12mm x 12mm motor controller that includes pic+boost controller, motor sense circuitry, and output stage, that will run a 100-watt motor. Yeah, I have bought similar rail-mounted supplies in the past, though usually it’s the Meanwell brand. The application is refurbishing 1980s-era equipment. Original equipment has a 6000rpm 110v universal motor, usually with worn out bushings and brushes, and faulty electronics. Replacement parts are generally available but getting prohibitively expensive. So a servo system would be overkill but nice, cheap, brushless motor with bearings is ideal. Works a treat too, except the power supply doesn’t fit. I apologize for the off topic content here but I do appreciate the input. > On Apr 25, 2023, at 10:26 AM, Todd Zuercher <to...@pgrahamdunn.com> wrote: > > Unfortunately a drive built to run off of line AC will generally be > approximately the same amount larger as the size power supply you need. > Simply because you've stuck the power supply inside the drive. You could try > looking for a smaller supply? Can you combine the power supply with any > other power source needs in you're machine? > > Here is a little 120w 24v one that mounts on a din rail and only takes up > about 1.5"x5"x4". (But maybe that isn't any better than you have.) > https://www.amazon.com/NVVV-EDR-120-24-24VDC-Industrial-Supplies/dp/B0932X2WHW/ref=sr_1_11?keywords=24v+5a+power+supply&qid=1682435519&s=electronics&sr=1-11 > > Todd Zuercher > P. Graham Dunn Inc. > 630 Henry Street > Dalton, Ohio 44618 > Phone: (330)828-2105ext. 2031 > > -----Original Message----- > From: Thaddeus Waldner <thadw...@gmail.com> > Sent: Tuesday, April 25, 2023 9:27 AM > To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net> > Subject: Re: [Emc-users] Medium voltage BLDC motor > > [EXTERNAL EMAIL] Be sure links are safe. > > What I mean is that specific driver would not fit into my space. I am > currently using a custom 24v BLDC driver that I built. But the only option > for power supply at this point is a wall wart that is about twice the size of > your typical laptop charger, which I'd like to eliminate. > > >> On Apr 25, 2023, at 7:00 AM, Todd Zuercher <to...@pgrahamdunn.com> wrote: >> >> I'm a little confused, a BLDC motor is still going to need a drive/driver, >> weather or not it runs at line voltage, that you say you don't have space >> for. How is that going to help you? >> >> Todd Zuercher >> P. Graham Dunn Inc. >> 630 Henry Street >> Dalton, Ohio 44618 >> Phone: (330)828-2105ext. 2031 >> >> -----Original Message----- >> From: Thaddeus Waldner <thadw...@gmail.com> >> Sent: Monday, April 24, 2023 5:40 PM >> To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net> >> Subject: [Emc-users] Medium voltage BLDC motor >> >> [EXTERNAL EMAIL] Be sure links are safe. >> >> HI, >> >> I have an application where I need a NEMA 23-size 80-120 watt brushless DC >> motor. The machine housing doesn't have space for a 100w DC 24v power >> supply, so I would like to use a controller and motor that runs at line >> voltage. >> >> Does anyone know of a small BLDC/PMAC/Synchronous AC motor that is designed >> to run at about 150v coil voltage? >> >> Motors this size/voltage are apparently quite common in kitchen appliances >> that use pumps or fans, but I cannot seem to find a plain motor with output >> shaft. >> >> >> >> Thanks, >> >> Thaddeus Waldner >> >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users >> >> >> _______________________________________________ >> Emc-users mailing list >> Emc-users@lists.sourceforge.net >> https://lists.sourceforge.net/lists/listinfo/emc-users > > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
