Abstract: A clean room system has filter-fan units each having at least one fan motor and being connected to an electric network. At least one central control unit is provided. A connecting bus system for connecting the filter-fan units to one another and to the at least one central control unit is provided.

Abstract: The invention relates to a system for the electronic commutation of a brushless DC motor (1) having three phase windings (u, v, w) which are electrically displaced by 120°, comprising a semiconductor bridge (4) consisting of six power semiconductors (S1 to S6), which drives the phase windings (u, v, w) for generating a rotating magnetic stator field, a control unit (6) which correspondingly drives the power semiconductors (S1 to S6), and a device for detecting the respective rotational position of a rotor exhibiting a permanent-magnetic magnet wheel, the device for detecting the rotor position being constructed as sensor-less evaluating unit (8), for evaluating the voltage induced by the rotating magnet wheel which can be measured at the winding terminal (U, V, W) of the motor which is not currently driven. It is the object of the present invention to achieve a reduction of running and commutation noises whilst maintaining the inexpensive and fault-insensitive sensorless rotor position detection.

Abstract: The invention relates to a fitting arrangement for an antivibration mounting of an electromotor (1) on a load-bearing component by means of several interelements (6) arranged distributed around the perimeter and consisting of an elastic material. To always achieve an optimum vibration isolation independently of the motor's fitting position, it is provided that the interelements (6) are designed as oblong, radially aligned web elements (8) and are arranged axially, clamped under elastic prestress, between a mounting surface (12) on the motor side.

Abstract: The invention relates to a mains-commutated, synchronous AC motor (1) with permanent-magnet excitation, which is configured as an external-rotor motor with a permanent-magnet external rotor (6) which rotates around an inner stator. In this case, an electronic starting apparatus (2) is provided which actuates the stator (4) in order to start the external rotor (6) in such a manner that the external rotor (6) is accelerated in a controlled manner to its synchronous rotation speed, and then continues to run in the mains-commutated synchronous mode.

Abstract: A tan having a fan wheel and an electric motor driving it, and a control unit for controlling the motor output as a function of fan-specific parameters. An actual-value signal corresponding to an actual rotational speed of the fan is measured and compared with a control signal corresponding to a required speed, and the actual speed is adjusted to the required speed by means of the control unit, wherefore the actual speed and the actual motor current or supply current are measured and conducted to a microcontroller as input signal variables, whereby the fan-specific data such as wheel diameter, density of the conveying medium, fan coefficients, motor coefficients, and a preset artificial characteristic curve ps=ƒ({dot over (V)}s ) are stored in the microcontroller as default values.

Abstract: An arrangement for the vibration-isolating or vibration-damping suspension of an electric motor in particular a fan motor, in a fan housing having a non-rotating motor-supporting element connected to a support part at least on one side via an integral elastic element. The elastic element consisting of three sections lying axially one behind another, in precise terms of a support connecting section connected to the support part in a torsion-resistant manner, of a motor connecting section connected to the supporting element in a torsion-resistant manner, and also of elastically deformable intermediate section arranged between the two connecting sections.

Abstract: The present invention relates to a system for controlling the rotation speed of AC motors, in particular single phase motors. In this case, a controllable electronic switching device is connected upstream of the motor and is actuated by a control unit such that a sinusoidal input AC voltage is used to produce a motor AC voltage which can be varied in order to change the rotation speed. The control unit is designed in such a manner that the fundamental frequency and/or the amplitude of the motor AC voltage can be varied by phase gating.

Abstract: An arrangement for the vibration-isolating or vibration-damping suspension of an electric motor (1) in particular a fan motor, in a fan housing (2) having a non-rotating motor-supporting element (6) connected to a support part (14) at least on one side via an integral elastic element (12). The elastic element (12) consisting of three sections lying axially one behind another, in precise terms of a support connecting section (16) connected to the support part (14) in a torsion-resistant manner, of a motor connecting section (18) connected to the supporting element (6) in a torsion-resistant manner, and also of elastically deformable intermediate section (20) arranged between the two connecting sections (16, 18).

Abstract: The present invention relates to an arrangement for the vibration-isolating mounting of an electric motor (2) on a support part (6) via an essentially disk-shaped support element (12). The support element (12) has a motor-holding section (24) for connection to the electric motor (2) and a support-holding section (26) for connection to the support part (6), and the two holding sections (24, 26) are connected via elastic, web-like connecting pieces (28). The connecting pieces (28) are designed such that the two holding sections (24, 26) are elastically movable relative to each other three-dimensionally in all directions in space, specifically axially, radially and tangentially, over a certain movement play. The support element (12) has integrated stop means for the three-dimensional limiting of the elastic relative movements of the holding sections (24, 26) and/or an additional mass (110) to influence the vibration behavior.

Abstract: The present invention pertains to a stator for an electric motor, composed of a stator core assembly (2), stator windings (3) and, arranged at one end of the stator core assembly (2), an interconnecting arrangement (4) for the stator windings (3). An interconnecting arrangement (4) features an insulating part (9) with slotted chambers (11) in order to accept electrical connecting leads (12), insulated from each other, in order to interconnect the wire ends (7) of the stator windings (3).