To start with, your phals are significantly different than your other orchids in terms of light requirements - it is a low light level plant - direct sunlight will in general cook the leaves - except very early morning and very late afternoon - safest as articuno noted to give it only indirect light. On the other hand - the dends and catt type orchids want lots of sun - and will require it in order to set blooms. You might want to check out the culture pages on the american orchid society page at this link and then come back with followup questions - it should give you a jump start on each of these three genera - phalaenopsis, dendrobiums and cattleya - you will find both a beginner and intermediate culture guide here -
American Orchid Society - Orchids