Abstract: A drive includes a dynamoelectric rotational machine, an electronic add-on part, and a fan unit arranged axially behind one another. The fan unit generates a cooling air flow and is embodied as a two-zone fan having axial fan elements which define a first zone to generate essentially an axial air flow and include an articulated joint with an elastic region with sufficient restoring force, and radial fan blades which define a second zone that radially adjoins the first zone and generate essentially a radial air flow. Free spaces are provided at least between a housing arrangement and the fan unit and/or between the housing arrangement and a bearing shield of the dynamoelectric rotational machine and/or between the housing arrangement and/or a shaft of the dynamoelectric rotational machine, with the free spaces being acted upon during operation of the fan unit by the cooling air flow and a Venturi effect.