Development of SEMITEC Compact Thermistor for Electric Vehicle Motor
Product Challenges
As the market for electric vehicles such as hybrid electric vehicles
(HEVs), plug-in hybrid electric vehicles (PHEVs), and electric vehicles
(EVs) increases as a percentage of global vehicle sales, the demand for
electric motors is growing rapidly.
In recent years, the performance and cost requirements for motors have
become stricter in response to the higher output and efficiency of
electric vehicles. One of these changes is the shift in motor windings
from round cables to flat cables and from concentrated winding to
distributed winding.
Thermistors are used to monitor the temperature of the motor windings
and play an important role in increasing the power output, efficiency,
and safety of electric vehicles.
SEMITEC also needs to propose thermistor specifications adapted to changes in windings and techniques.
Efforts to overcome challenges
Cylindrical thermistors have been the norm because thermistors could be mounted by embedding them in the windings.
SEMITEC is developing a compact sheet thermistor with excellent
temperature measurement performance and responsiveness for flat cables
by changes in windings.
Compared to the conventional cylindrical type, it has better results in terms of response time for temperature changes of the measured object and transient temperature measurement precision.
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