Thermally Coupled NTC Disc Thermistors for Power Applications

A pair of small disc NTC thermistors were joined together laterally using a thin layer of silicon resin between them to form a novel thermally coupled device (TCT). The epoxy coating on disc thermistors enables concurrent galvanic isolation and thermal coupling. Input thermistor Th 1 in the coupled...

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Bibliographic Details
Published in:IEEE sensors journal 2024-04, Vol.24 (8), p.1-1
Main Authors: Bodic, Milan Z., Rajs, Vladimir M., Aleksic, Stanko O., Damnjanovic, Mirjana S., Kisic, Milica G.
Format: Article
Language:English
Subjects:
Ambient temperature
Automotive electronics
disc thermistors
Epoxy coatings
Household appliances
Manganese
Nickel
Resins
Silicon
Stability analysis
Temperature
temperature sensors
Test chambers
Thermal coupling
Thermistors
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Summary:A pair of small disc NTC thermistors were joined together laterally using a thin layer of silicon resin between them to form a novel thermally coupled device (TCT). The epoxy coating on disc thermistors enables concurrent galvanic isolation and thermal coupling. Input thermistor Th 1 in the coupled pair was self-heated at constant voltages and acts as heat transmitter while the output thermistor Th 2 acted as a heat receiver through the epoxy layer and silicon resin. Small NTC disc thermistors with different nominal resistances were produced out of nickel manganese and modified nickel manganese powder. The disc thermistor resistances and the thermistor exponential temperature factor B were measured in the climatic test chamber. The input power, resistance and temperature of both disc thermistors were measured at different ambient temperatures as a function of input voltage and time. The temperature of thermistors Th 1 and Th 2 (input and output) was determined using the Steinhart - Hart equation. The TCT device sensitivity, stability and inaccuracy were also analyzed. The applications of disc TCT device are based on the measuring of output temperature vs. input power in automotive electronics, home appliances and power convertors.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2024.3371181