Ebm-papst Mulfingen Gmbh & Co Kg

Gerd Futterlieb

Dieter Best

Helmut Lipp

Malte Pils

Holger Hartmann

Rainer Zierlein

Jens Rössler

Oliver Kleinheinz

A temperature monitoring device for protecting the winding of an electronically commutated electric motor from being heated over a specified limit temperature Tregardless of the rotational speed includes a phase current detection device for detecting the phase current Ifor the motor windings, an overcurrent switch-off device for switching off the electric motor if a maximum permissible phase current Iis 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 Iexceeds the maximum permissible phase current Iascertained by a detection and computing device, wherein an algorithm in which the measured ambient temperature Tis incorporated is used when ascertaining the maximum permissible phase current I.

Assembly for monitoring a winding threshold temperature

A stator for a brushless, electronically commutated electric motor having a stator core wound with stator windings and control electronics for controlling the stator windings. The stator core together with the stator windings are enclosed in a molded encapsulation made of a plastic material of a defined thermal conductivity (&#x3bb;St). The temperature sensor is arranged on the outside at the encapsulation, and the control electronics are designed such that they calculate the temperature in the region of the stator windings on the basis of the temperature detected by the temperature sensor taking into account a specific stator temperature profile stored in a memory. Furthermore, the invention relates to a brushless, electronically commutated electric motor having a stator as described above.

Stator for an EC-motor and EC-motor with such a stator

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Obersontheim, Germany

Gerd Futterlieb