What You Need To Know About Power Resistors
Power resistors are very important equipment in the modern world where just about everything is power driven. People are extremely dependent on electricity and electronics due to the high-speed applications of these electronics that help to make work easier. However, for every electronic to be fully and effectively functional, it needs to have a power resistor. You will find that most of the electronics would use low power resistors due to their low wattage rates. For bigger appliances that have wattage ratings of one or higher, high power resistors are more appropriate for these kinds of appliances, such as heaters and amplifiers.
Power resistors like current sense resistor basically work by balancing the heat generated to avoid damaging the electronic and to keep it fully functional. The power resistors do this by dissipating power as a result of the voltage and current passing through the electronic, and this dissipated power would be converted to heat, which would, in turn, make the temperature of the resistor to rise. This temperature will keep rising until the heat that is generated can be balanced by the heat that is passing through the air, the circuit board as well as the surrounding environment.
However, when the power resistor is operated under temperatures that are higher than the recommended temperature for the specific resistor, damage can be caused to the resistor such as reduced working life of the resistor, changes in the resistance value or the resistor can even catch on fire, which can spread to the materials around it. Therefore, one should always operate within the rated temperature and power of the particular type of resistor. More so, it is advised to keep the temperatures of the resistor low as this will enable one to avoid damaging the resistor, help to increase the working life of the resistor, and can also enable the resistor to handle higher currents without getting damaged or degraded.
To help with the good care of the power resistors, manufacturers also often derate the power resistors, hence ensuring that the operating temperatures are kept low, thus avoiding damage to the resistor. Manufacturers also help to do this by keeping the high power resistors in flame resistant packages as this helps to reduce the risk of hazardous failure.
The operating conditions to use are usually specific to the type of power resistor that you are using, be it the wire wound resistor, the cement resistors, the current shunt resistors, metal film resistors, among others. Therefore, to take good care of the power resistor, one needs to adhere to the specific operating conditions of the particular type of resistor. Check out more from this wirewound Resistor company.