Abstract: A fan wheel for a fan is equipped with at least two fan blades with a wavy design. A fan has at least one such fan wheel. A system has at least one fan with such a fan wheel.

Abstract: The invention relates to an input stage (1) for a motor controller (2), especially a motor controller for an electric motor, the input stage (1) being provided with an input (3) for inputting an input signal and an output (4) for connection to the motor controller (2). The input stage (1) is designed to generate a control signal from an input signal between a first voltage Uunten and a second voltage Uoben>Uunten and output said control signal as a parameter to the motor controller (2) via the output (4). In order to be able to simultaneously use the control input (13) for communicating, the input stage (1) comprises a first comparator (5) for comparing the input signal with a first threshold voltage Us1>Uoben as well as a data output unit (10). The data output unit (10) generates a communication signal on the basis of at least one portion of the input signal.

Abstract: A motor for fans or ventilators, pumps or compressors, in particular electronically commutated motors (EC-motors), with integrated motor electronics and at least one sensor unit (11) for direct or indirect pressure/volume flow control, whereby the control can be carried out internally or externally. It is characterized in that the sensor unit (11) is designed as a module that can be plugged onto the motor electronics or plugged into the motor electronics or is at least partly integrated into the motor electronics and is preferably supplied with energy via the motor electronics, i. e. internally. Furthermore, the invention concerns a method for the operation of such a motor (2) and a fan system with at least one motor (2) or fan in accordance with the invention.

Abstract: The invention relates to a fan wheel having blades (11) which are distributed over the circumference and are connected to one another in the circumferential direction via at least one ring. The fan wheel consists of at least three integrally formed segments (I to VII). Said segments comprise at least one respective ring portion (1) of at least one ring as well as either a blade (II) or at least a portion of the blades. The segments (I to VII) are joined together to form the fan wheel. The ring portions (1) lie against each other with edges (4, 5) which form the joining areas (15, 16) that are disposed transversely with respect to the circumferential direction of the fan wheel. At least one edge (4) of the ring portion (1) of each segment (I to VII) is provided with at least one projecting form-fitting part (18), and at least one edge (4, 5) of the ring portion (1) of each segment (I to VII) is provided with at least one recess (17) which is at least approximately complementary to the form-fitting part (18).

Abstract: The invention relates to an electric motor having a stator and an electronics compartment which receives electric/electronic structural parts. Said electric motor is accommodated in an electronics housing and can be closed by a housing cover. In order to maintain leakage paths and/or air paths between the housing cover and the electric/electronic structural parts, the electric motor has an intermediate insulating part (1) which is made of an electrically insulating plastic and has a supporting part as hard component and at least one soft component as sealing part (14, 25). The soft component is connected cohesively and/or by positive engagement to the hard component. The intermediate insulating part (1) has at least one pressing element (33) by which at least one heat-generating structural part is pressed against a cooling surface. The intermediate insulating part (1) has a hood-shaped support which is made of a hard, electrically insulating plastic.

Abstract: A protective circuit for an inverter is disclosed, the protective circuit comprising a safety element, a switching arrangement, and a control circuit, with the safety element being arranged in a feed line to the power element, and the switching device being switched to the safety element such that the switching arrangement bridges the safety element when the switching arrangement is in a conducting state. The control circuit is embodied such that it, upon receipt of one control pulse or several successive control pulses, emits a switching signal to a switching arrangement for a predetermined period of time, with the switching arrangement being switched through in case of periodic receipt of the control pulses and with the absence of the control pulse opening the switching arrangement after a predetermined period of time, and triggering a protection of the inverter by the safety element.

Abstract: The rotor comprises rotor segments consisting of a magnetically conductive material, which segments are distributed across the circumference of a rotor housing. Rotor housing portions of low magnetic conductivity are located between the rotor segments. The rotor segments are embedded in a main body in such a way that the outside or inside of the main body forms a closed housing. To produce the rotor a star-shaped blank is punched out of a metal sheet, the arms of said blank being bent out in relation to a central part connecting said arms, in order to form the rotor segments.

Abstract: A radial fan wheel comprising vanes (2) which are inclined against the rotational direction (8) (radial impeller inclined towards the rear), the outer edge regions (14, 7) of the top and bottom disks (3,4) projecting past the effective diameter (DAs) of the vanes. The diffusion space thus established between the bottom and top disks (1,3) and the effective and outer diameter (Das, DN) of the vanes enables the kinetic energy of the fluid to be effectively converted into static pressure).