Abstract: An arrangement for contact-connecting at least one electronic component mounted in a housing with connection wires to a cooling surface and a spring element that can be fixed in the housing and has at least one spring arm which presses the component against the cooling surface in a contact-pressure position of the spring element is presented. The arrangement is characterized in that the spring element can be inserted into the housing without touching the component, and the housing is provided with retaining means for the spring element adapted in a manner so that no shear forces are produced in the longitudinal direction of the connection wires when the spring element is mounted.

Abstract: An arrangement for contact-connecting at least one electronic component mounted in a housing with connection wires to a cooling surface and a spring element that can be fixed in the housing and has at least one spring arm which presses the component against the cooling surface in a contact-pressure position of the spring element is presented. The arrangement is characterized in that the spring element can be inserted into the housing without touching the component, and the housing is provided with retaining means for the spring element adapted in a manner so that no shear forces are produced in the longitudinal direction of the connection wires when the spring element is mounted.

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: 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: 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.