APPARATUS FOR DETECTING A RISE IN TEMPERATURE IN AN ELECTRIC MOTOR

APPARATUS FOR DETECTING A RISE IN TEMPERATURE IN AN ELECTRIC MOTOR

The invention relates to an apparatus (1) for detecting a rise in temperature in an EC motor (3) designed with a resonant circuit (10), having at least one coil (L) and a device (20) for measuring the oscillation frequency ω of the resonant circuit (10), the device (1) being designed to be connected...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: HUMM, Markus, ROSENBERGER, Daniel, WYSTUP, Ralph
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
MEASURING
MEASURING QUANTITY OF HEAT
MEASURING TEMPERATURE
PHYSICS
TESTING
THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
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Beschreibung
Zusammenfassung:The invention relates to an apparatus (1) for detecting a rise in temperature in an EC motor (3) designed with a resonant circuit (10), having at least one coil (L) and a device (20) for measuring the oscillation frequency ω of the resonant circuit (10), the device (1) being designed to be connected to the terminals of the EC motor (3). The coil (L) of the resonant circuit is produced from a shape memory material having at least two different temperature-dependent stable states (Z1, Z2). If the temperature is lower or higher than a certain temperature, the coil (L) changes from one stable state into the other stable state and the oscillation frequency ω of the resonant circuit (10) changes.