In this post we compare two of the most common resistor kinds for electricity resistor applications, Wirewound building and thick film technological know-how.
Regardless of the building The key design issues when designing any energy resistor are:
- The resistor worth
- The necessary electric power dealing with functionality
- Resistance stability with time
- Transform in resistance value with temperature
In almost any superior energy software temperature results along with the resistor ability handling ability are the most crucial issues. The supplies and approaches used to assemble the resistor includes a immediate effect on its long-lasting overall performance and security.
Resistor Design
The resistor style and building has a direct effect on its lasting security and performance. Whole resistance is decided from the resistivity from the resistor content, and the resistor track length, width and thickness. You can find obvious limits with what ever resistor material is selected. For thick movie resistors although it can be done to extend monitor duration and width significant boosts in thickness are impossible along with a minimal selection of material resistivity can be found. For wirewound increasing possibly the wire thickness or duration has A significant impact on the size from the resistor.
The long run security with the resistor substance as well as the effects of temperature may also be key things to consider. Temperature outcomes can degrade the resistor functionality or, in Severe cases, result in resistor failure. Inside the thick film resistors temperature results could be minimized by picking an suitable thickness of a suitable substrate materials. For Wirewound resistors the construction, core materials, the wire style and diameter, the all call for mindful thing to consider.
Comparing Resistor Systems
The true secret advantages of thick film power resistors above Wirewound are smaller sized dimensions, are offered at substantially decrease Price tag (which includes tooling cost), have lessen inductance and enhanced thermal management. Thick movie resistors are hence smaller, Possess electronic components a more rapidly frequency response and are far better suited to warmth sinking programs. Thick movie technology also delivers higher resistance values and better voltage rating than Wirewound resistors.
The most important advantage of thick film technology in superior electrical power apps would be the higher thermal conductivity of your ceramic (Alumina) substrate making it perfect for applications in which significant energy dissipation is needed in a small area. The substrate content implies it is an excellent match Along with the aluminium materials in heat sinks and is chemically inert and mechanically stable.
Summary
Even though Wirewound resistors do offer increased precision (improved tolerance), larger steadiness and reduce values it is frequently for the expense of much larger footprint and better inductance than an equal thick film machine. Any Wirewound resistor is basically a coil of wire (an inductor) and Even though preference of fabric can limit the impression in the high inductance it stays An important drawback. The coil construction also makes heat dissipation A significant challenge.