Re: [Emc-users] AC power for stepper motor drivers?
> Some of the larger size Stepper motor drivers will use AC input power. I > assume all that is needed is a transformer that is rated for the required > current (and a fuse.) > > Most people are using these Meanwell-style switching power supplies but it > seems AC power might be better I think ring transformers is a good option. They manufactured them where I worked before but have stopped, old factory name Transductor. Are not sure but about power factor and efficiency but expect they are worse, are also pretty sure voltage get lower at higher load. Do however expect the transformers to be very reliable. ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] AC power for stepper motor drivers?
I 'rebuilt' a smaller lathe and mill, new steppers, drivers etc, but I wanted to keep the knobs/switches on the enclosure working like they used to. So I just ended up doing everything with DC. I only found out there are drivers that actually use DC (after I upgraded one of them), else I probably wouldn't even have kown. Ron On 6/8/20 8:15 PM, Chris Albertson wrote: I just re-discovered Antek. They make toroidal transformers for CNC and high-end audio. They also make unregulated DC power supplies using these transformers. If you need 5.6 amps at about 80 volts DC one of these will work https://www.antekinc.com/ps-5n84-500w-84v-power-supply/ Note that it is rated for continuous 5.9 amps even with 50 Hz mains. This DC supply costs about $120 but for about $60 you could buy an AC transformer with the same power rating. (I've just answered my own question) I used to use this company's products when I was into tube-based audio. It is a US based company and they are easy to deal with. They also make much larger power supplies. It took me a while to "change gears" from audio to machine tools but both need big DC power. On Mon, Jun 8, 2020 at 1:44 PM R C wrote: I have one that does both, for a larger stepper motor. It can take a bit of effort to find a DC PSU that can actually provide 5.5A the motor can 'pull', it's a lot easier to get a transformer for one (my driver is 48VAC-80VAC OR 24VDC-110VDC) Jus a transformer will provide the amps your 'pulling' and of course without any measures, spikes etc can happen. A switching power supply has bit of protection there. I think the driver probably has some simple rectifier in it, I would expect much there. On 6/8/20 2:05 PM, Chris Albertson wrote: Some of the larger size Stepper motor drivers will use AC input power. I assume all that is needed is a transformer that is rated for the required current (and a fuse.) Most people are using these Meanwell-style switching power supplies but it seems AC power might be better Questions Is there is the best type of transformer? Is there a good supplier? What about back EMF? Not knowing how the driver works I wonder what happens when the motor is breaking. Can there be an overvoltage problem? ___ 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
Re: [Emc-users] AC power for stepper motor drivers?
I just re-discovered Antek. They make toroidal transformers for CNC and high-end audio. They also make unregulated DC power supplies using these transformers. If you need 5.6 amps at about 80 volts DC one of these will work https://www.antekinc.com/ps-5n84-500w-84v-power-supply/ Note that it is rated for continuous 5.9 amps even with 50 Hz mains. This DC supply costs about $120 but for about $60 you could buy an AC transformer with the same power rating. (I've just answered my own question) I used to use this company's products when I was into tube-based audio. It is a US based company and they are easy to deal with. They also make much larger power supplies. It took me a while to "change gears" from audio to machine tools but both need big DC power. On Mon, Jun 8, 2020 at 1:44 PM R C wrote: > I have one that does both, for a larger stepper motor. > > It can take a bit of effort to find a DC PSU that can actually provide > 5.5A the motor can 'pull', it's a lot easier > > to get a transformer for one (my driver is 48VAC-80VAC OR 24VDC-110VDC) > > Jus a transformer will provide the amps your 'pulling' and of course > without any measures, spikes etc can happen. A switching > > power supply has bit of protection there. I think the driver probably > has some simple rectifier in it, I would expect much there. > > > > > On 6/8/20 2:05 PM, Chris Albertson wrote: > > Some of the larger size Stepper motor drivers will use AC input power. > I > > assume all that is needed is a transformer that is rated for the required > > current (and a fuse.) > > > > Most people are using these Meanwell-style switching power supplies but > it > > seems AC power might be better > > > > Questions > > Is there is the best type of transformer? Is there a good supplier? > > What about back EMF? Not knowing how the driver works I wonder what > > happens when the motor is breaking. Can there be an overvoltage problem? > > > > > ___ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users > -- Chris Albertson Redondo Beach, California ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] AC power for stepper motor drivers?
I have one that does both, for a larger stepper motor. It can take a bit of effort to find a DC PSU that can actually provide 5.5A the motor can 'pull', it's a lot easier to get a transformer for one (my driver is 48VAC-80VAC OR 24VDC-110VDC) Jus a transformer will provide the amps your 'pulling' and of course without any measures, spikes etc can happen. A switching power supply has bit of protection there. I think the driver probably has some simple rectifier in it, I would expect much there. On 6/8/20 2:05 PM, Chris Albertson wrote: Some of the larger size Stepper motor drivers will use AC input power. I assume all that is needed is a transformer that is rated for the required current (and a fuse.) Most people are using these Meanwell-style switching power supplies but it seems AC power might be better Questions Is there is the best type of transformer? Is there a good supplier? What about back EMF? Not knowing how the driver works I wonder what happens when the motor is breaking. Can there be an overvoltage problem? ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] AC power for stepper motor drivers?
Some of the larger size Stepper motor drivers will use AC input power. I assume all that is needed is a transformer that is rated for the required current (and a fuse.) Most people are using these Meanwell-style switching power supplies but it seems AC power might be better Questions Is there is the best type of transformer? Is there a good supplier? What about back EMF? Not knowing how the driver works I wonder what happens when the motor is breaking. Can there be an overvoltage problem? -- Chris Albertson Redondo Beach, California ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
