I've got an installation project that controls an oversized set of venetian blinds made of aluminium.
We need a method to control forward and reverse and speed.
but we are willing to switch to a DC motor so that we can have a much easier time interfacing with a H-Bridge circuit.
Do you folks have any recommendations for controlling motors that have similar specs as above (250in-lbs toque, 1/15 HP ish, currently we have 4RPM but we'll be stepping it down to something super slow)?
Are there any commercial h-bridge breakouts capable of handling these sorts of motors?
I am all ears and willing to hear any ideas before we start specifying our approach.
We are somewhat open to the idea of getting a completely new motor if necessary, so voltages, currents and duty cycles are all totally open if theres an adequate motor on the market (thats interface-able).
That motor requires 115 V at 1.1 amps full load, AC or DC. There are very few motor drivers that can handle 115V DC (at least not of the hobby type) so you are probably OK with a relay and 115VAC.
I would recommend a solid state relay. They can be controlled by a single output pin of an Arduino and would easily handle the load. They are much more reliable than contact (mechanical) relays and can be purchased quite cheaply at surplus outlets. Here is an ebay example: solid state relay for sale | eBay
conorowenbarry:
Thanks for the suggestions folks... I came across these guys today.
Since our motor is universal, I'm wondering whether these DC drives might do the job: http://www.kbelectronics.com/data_sheets/kbwd.pdf (although this one doesn't seem to have reverse)
If the motor is universal and doesn't have a reverse switch built-in, it won't go in
reverse - that's why its universal, ac and dc (either sense) all push it the same
direction. You have to reverse the stator windings w.r.t. the commutator to reverse it.
If you've got a reverse switch, or separate external access to both stator and rotor
connections, then you have a way to reverse it, if there's only 2 wires you cannot.