I have a European PS3 but I'm going to Canada in a couple days and wanted to know if the motion controllers from US will work on my PS3. They are A LOT cheaper there and in Portugal is nowhere easy to find them available to buy used...
Based on my knowledge there is no difference in hardware devices, since we're not talking about the power supply or different tech standards like in mobile phones/networks. Therefore I guess you won't have any problem to get your PS3 to work with this device.
If you buy a new one from a shop keep in mind that you may have some trouble with the sending in for repair.