Looks a lot like a brassavola, but I can't be certain as I'm not the most experienced grower. I only have one Brassavola, a Little Stars variant, it's not as full as your plant is but the structures look similar.
It's a Dendrobium in the group sometimes considered a separate genus, Dockrillia. It doesn't look like the frequently-grown Dockrillia wassellii but perhaps that's because it's been grown in high light.
I suggest you page through the genus Dockrillia at IOSPE (orchidspecies.com) and find the closest match to the flowers, not to the plant.
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