No electric shaver is designed specifically for African American men, however, the Braun Series 7 is a good option. Also, changing the way the face is shaven may help.
The Braun Series 7 has high reviews as a shaver for black men. It creates very little irritation while still allowing a close shave. It uses a patented technology called the "Active Lift" that grips curly hair easily.
A few tricks can also help get a nice shave. Always shaving with the grain, and only going over an area once are recommended, as are using a shaving cream and aftershave with every shave.