cookplate

noun

Plural:   cookplates

A standalone electric hot plate cooker, or one of the two, four or more (usually round) heating areas of an electrical stove.

Examples: 

Assorted gas rings or electric cookplates will require specific power settings so that all meals crispen approximately simultaneously.  (Source: J∙ Okram - Bartonian Potato Pancakes  ●  Cooking Recipe.)