Abstract: A fan includes an electric motor and a fan wheel drivable or driven by the electric motor, arranged within its housing. The underside of the housing has an opening for an electric outlet, and a side the housing has a bracket, thereby forming a bushing. An electric line is arranged at least partially at the underside of the housing and is guided through the bushing, and a cover element is arranged at the underside of the housing. The cover element has a first section and a second section. The cover element is arranged at the underside of the housing in such a way that the first section is at least partially arranged in the bushing and clamps the electric line in the bushing while forming a strain relief, and that the second section covers the opening.

Abstract: A method is provided for electrically driving a motor having a plurality of phase windings such that EMC (electromagnetic compatibility) is improved and the running performance of the motor is simultaneously kept constant. At least one of the phase windings is not supplied with a current pulse during a complete revolution of the rotor, or at least one switchable electrical resistor is switched on, for at least one subsequent commutation phase by means of an electrical switching element, if the detected rotor speed is greater than the specified target speed.

Abstract: The invention relates to a fan unit, having an air guide tube and a fan grate, wherein an air channel is formed by the air guide tube and the fan grate is arranged over a first end opening of the air guide tube in order to protect a fan wheel that can be arranged within the air guide tube. In order to improve such a fan unit in such a way that vibrations can be reduced in a simple and effective manner, at least three damping elements are arranged between the air guide tube and the fan grate in order to reduce vibrations.

Abstract: In order to give an especially compact, cost-effective and electromagnetically compatible design to a cooling device with a heat sink and a radial fan arranged in or on the receiving area of the heat sink, the bushing is adhesively bonded onto the heat sink in or on the receiving area, or the bushing is integrally designed with the heat sink.

Abstract: A fan includes an electric motor and a fan wheel drivable or driven by the electric motor, arranged within its housing. The underside of the housing has an opening for an electric outlet, and a side the housing has a bracket, thereby forming a bushing. An electric line is arranged at least partially at the underside of the housing and is guided through the bushing, and a cover element is arranged at the underside of the housing. The cover element has a first section and a second section. The cover element is arranged at the underside of the housing in such a way that the first section is at least partially arranged in the bushing and clamps the electric line in the bushing while forming a strain relief, and that the second section covers the opening.