As far as I know the lifetime of a LED depends on its junction temperature. The lifetime approx. doubles with each 10 degrees decrease of junction temperature.
The junction temperature, at its turn, depends at the one side of the ambient temperature and at the other side of the internal...
For a light switching application we use a PCB relay with a high inrush current rating (120A/20ms).
We frequently get questions from our customers, because they use lighting ballast (ECG's) with different current-time specifications for the inrush current.
Is there any theoretical model to...
A power transformer has an output rating in VA. If I load the transformer with a single side rectified circuit with a big electrolytic capacitor for smoothing and a DC load, the power factor of the transformer load will be very bad. Is it allowed in this case to load the transformer with an...
At our company building we have a heat recovery ventilation unit with cross flow heat exchanger. We have calculated the Effectiveness of the heat exchanger by measuring the outdoor inlet air temperature, the indoor supply air temperature and the indoor return air temperature. I measured an...
We are working on development of a new electronic product which is mounted in a control panel. We have run some thermal simulations to predict the thermal behavior of the product in the panel. The panel is a fully closed cabinet, so there is no airflow and only natural convection occurs.
We have...
