Hello,
I have experiences from EMC laboratory work something about 8 years. So here is help a little bit. Because I don't know better you project these advises bases in to common standards.
If you make a motor control card it must be pass next tests.
Emission:
EN61000-3-2 50Hz harmonics, only AC equipments
EN61000-3-3 Flickering, only AC equipments
CISPR22 Conducted emission for industrial (if your control card goes to industrial, if not then using office limits)
CISPR22 Radiated emission from 30MHz up to 1GHz with industrial or office limit line
Immunity:
EN61000-4-2 ESD immunity (Industrial, Air +-1kV up to +-15kV and Contact +-1kV up to 8kV, Office levels, Air +-8kV and Contant +-4kV
EN61000-4-3 Radiated Immunity from 80MHz up to 2GHz (goes upper in near of the future) (Industrial 10V/m, Office 3V/m)
EN61000-4-4 EFT (Industrial +-4kV, Office +-2kV. Signal lines have own levels)
EN61000-4-5 Surge (Industrial +-2kV / +-4kV, Office +-1kV / +-500V
EN61000-4-6 Conducted Immunity (Industrial 10V/m, Office 3V/m)
EN61000-4-11 Voltage dips and interruptions.
All these tests have different performance criteria but mainly this tested equipment must be work ok after tests and it must not be dangerous after tests! (Surge is one of these test where this equipment can be "crash" and it can become dangerous).
If you have some problems I can give more information.