Abstract: A temperature monitoring device for protecting the winding of an electronically commutated electric motor from being heated over a specified limit temperature TG regardless of the rotational speed includes a phase current detection device for detecting the phase current IWinding for the motor windings, an overcurrent switch-off device for switching off the electric motor if a maximum permissible phase current IShutdown is exceeded, and an overcurrent monitoring device, which is connected to the overcurrent switch-off device, in order to transmit to it a switch-off signal if the detected phase current IWinding exceeds the maximum permissible phase current IShutdown ascertained by a detection and computing device, wherein an algorithm in which the measured ambient temperature TU is incorporated is used when ascertaining the maximum permissible phase current IShutdown.

Abstract: The disclosure relates to control electronics in a modular design, comprising an electronic base module and a plurality of functional modules, wherein: the base module provides at least one DC link voltage UZK at a voltage supply output for the voltage supply of the functional modules and the functional modules are electrically and mechanically connected to the base module and are supplied with the DC link voltage UZK by the base module; the base module and the functional modules each have a carrier having electronic components, the electronic components of the base module producing the DC link voltage UZK, at least one functional module being fastened to the carrier of the base module; and the electronic components of the base module and of the functional modules are arranged separate from one another by means of a thermal decoupling and/or an EMC shield.

Abstract: The disclosure relates to control electronics in a modular design, comprising an electronic base module and a plurality of functional modules, wherein: the base module provides at least one DC link voltage UZK at a voltage supply output for the voltage supply of the functional modules and the functional modules are electrically and mechanically connected to the base module and are supplied with the DC link voltage UZK by the base module; the base module and the functional modules each have a carrier having electronic components, the electronic components of the base module producing the DC link voltage UZK, at least one functional module being fastened to the carrier of the base module; and the electronic components of the base module and of the functional modules are arranged separate from one another by means of a thermal decoupling and/or an EMC shield.

Abstract: The invention relates to a method for monitoring at least the motor temperature as a motor parameter during operation of at least one electric motor (1) at power electronics (2), having the following steps: acquiring electrical motor variables by measurement with a measuring device (3); creating a parameter file (6) containing motor parameters (4) using the measured motor variables, or reading the motor parameters (4) out of a data store (7), wherein a controller (5) controls the electric motor (1) with regard to at least the temperature as a motor parameter, using the further motor parameters (4) from the parameter file (6).

Abstract: A temperature monitoring device for protecting the winding of an electronically commutated electric motor from being heated over a specified limit temperature TG regardless of the rotational speed includes a phase current detection device for detecting the phase current IWicklung for the motor windings, an overcurrent switch-off device for switching off the electric motor if a maximum permissible phase current IAbschalt is exceeded, and an overcurrent monitoring device, which is connected to the overcurrent switch-off device, in order to transmit to it a switch-off signal if the detected phase current IWicklung exceeds the maximum permissible phase current IAbschalt ascertained by a detection and computing device, wherein an algorithm in which the measured ambient temperature TU is incorporated is used when ascertaining the maximum permissible phase current IAbschalt.

Abstract: A fan includes a fan housing and a motor accommodated therein. The motor has a stator and a rotor, which is connected to a fan wheel. The fan housing consists of at least a housing upper part and a housing lower part. The housing upper part has an axial opening on the axial inner face of which facing the housing lower part the stator is arranged. On the axial outer face of the axial opening at least electronics are arranged.

Abstract: The present invention relates to an apparatus for reducing and/or avoiding harmful bearing currents in an electrical machine (M) such as preferably a three-phase EC motor (M), with a rotor (2) and a stator (3) which is constructed in an insulated manner, wherein at least one outer bearing ring (4a) and one inner bearing ring (4b) are provided between rotor (2) and stator (3), comprising connecting electronics (10) for connecting the motor (M), wherein the stator (3) is connected by means of an electrical connection (20) to a high-frequency electronics potential (11) which differs from the earth potential (UE) and is stable with respect to the latter at a potential tap (20a) of the connecting electronics (10).

Abstract: The present invention relates to an apparatus for reducing and/or avoiding harmful bearing currents in an electrical machine (M) such as preferably a three-phase EC motor (M), with a rotor (2) and a stator (3) which is constructed in an insulated manner, wherein at least one outer bearing ring (4a) and one inner bearing ring (4b) are provided between rotor (2) and stator (3), comprising connecting electronics (10) for connecting the motor (M), wherein the stator (3) is connected by means of an electrical connection (20) to a high-frequency electronics potential (11) which differs from the earth potential (UE) and is stable with respect to the latter at a potential tap (20a) of the connecting electronics (10).

Abstract: A fan includes a fan housing and a motor accommodated therein. The motor has a stator and a rotor, which is connected to a fan wheel. The fan housing consists of at least a housing upper part and a housing lower part. The housing upper part has an axial opening on the axial inner face of which facing the housing lower part the stator is arranged. On the axial outer face of the axial opening at least electronics are arranged.