Apparatus for detecting increase in temperature in electric machine

The invention relates to an apparatus (1) for detecting an increase in the temperature of an EC electric machine (3). The apparatus (1) is designed with an oscillation circuit (10) having at least one coil (L) and a device (20) for measuring the oscillation frequency omega of the oscillation circuit (10), wherein the apparatus (1) is designed to be connected to a terminal of the EC electric machine (3), the coil (L) of the oscillating circuit is made of a shape memory material having at least two different temperature-dependent stable states (Z1, Z2), and the coil (L) transitions from one of the states to the respective other stable state when the temperature is below or above a certain temperature, furthermore the oscillation frequency omega of the oscillation circuit (10) changes. 本发明涉及一种用于探测EC电机(3)的温度升高的设备(1)，所述设备(1)被构造得具有振荡回路(10)，所述振荡回路(10)具有至少一个线圈(L)和用于测量所述振荡回路(10)的振荡频率ω的装置(20)，其中所述设备(1)被构造为被连接在所述EC电机(3)的接线柱上，而且所述振荡回路的线圈(L)由形状记忆材料制成，所述形状记忆材料具有至少两个不同的与温度相关的稳定状态(Z1、Z2)，而且其中在低于或超过某一温度时，所述线圈(L)从其中一个状态变换到相应另一