cogoman wrote: > > Remembering an article in Machine Design about the CUI AMT303 > commutating encoder made it seem like a good choice for adding U/V/W > signals to a BLDC motor that doesn't have hall sensors until I saw the > price. Digi-key has them for nearly $100. A bit too high, but these > are really nice devices. To align them with your motor, you just > energize one phase with + volts, another phase with - volts, and leave > the third disconnected; then toggle the Zero Position pin, and it sets > the commutation angle to the motor. > You can get Avago encoder "kits" from Avnet for about $35 for the set. There is an encoder wheel and a sensor unit. I got the AED-9340-W15A, which has 2500 cycles/rev on the quadrature output, and 2-pole-pair commutation. You can get 1000 to 2500 cycles/rev, and 2- 3- or 4-pole-pairs on the commutation output. You can also get shaft diameters from 3-10 mm as well as 3 imperial sizes.
These are not complete encoders in a housing, but a codewheel and a sensor head that can be mounted to the end of a motor. I have not used them yet, but got some Pacific Scientific motors without encoders, and will eventually put these on them. Jon ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
