Modular interface concept for an electric drive

A modular control unit is specifically adaptable in terms of interface functions for an electric motor selected from a predetermined set of electric motors, in particular of electric motors of the same power class, the control unit comprising:

• at least two printed circuit boards, including a first printed circuit board and at least one second printed circuit board (L1, L2), selected from a set of N different printed circuit boards (L1, L2, . . . , LN) where interface functions, electrical components, electronic components or control units for the operation of the electric motor are located;
• the first printed circuit board (L1) is a basic printed circuit board equipped with power electronics (LE) for the electric motors and is accommodated in a first housing of the control unit;
• further interface functions of the power electronics (LE) are provided separately from the power electronics (LE) of the electric motors on the at least one second printed circuit board (L2) and the at least one second printed circuit board (L2) includes a second housing separate from the first housing and the first housing has a housing wall enclosing the first printed circuit board, on which the second housing is mounted outside of the first housing, and the second housing rests on a housing portion at an external and stepped recess positioned outside of the first housing and thereby complements the shape of the first housing.