powerresistorsales-blog

[powerresistorsales-blog]

Fundamentals to Fathom about Wirewound Resistors

The number of electronic applications and instrumentations using power resistors is on the rise. There are also multiple types of power resistors and wirewound is the most integral more so where the application has low frequencies. Throughout this article, you will garner facts about wirewound resistors and how they are constructed and the advantages they bring to the table.

To begin with, you need to fathom what wirewound resistors are. Basically, these are types of passive components and these passive components are found in metal wires which are overly used to resist electric current from penetrating or accessing certain levels. In most cases, wire wound resistors are made with a resistance material and non-conductive materials. The resistance materials are the metal wires made from Nichrome and the non-conductive materials or the metal core are made from ceramic, fiberglass or plastic materials. Do check out current shunt resistor company solutions. 

When it comes to the construction of the wirewound resistors, the metal wire is normally wounded or zigzagged on the metal core. The reason why Nichrome and manganin materials are the most preferred is due to their stability and high resistance strength and at the same time, their idealness to high temperatures. For the wire wound resistor to work effectively on high temperatures, insulation is necessitated. Therefore, there is need for an insulating material like the vitreous enamel to be used. This insulating element will overly help block all kind of outside or external heat from penetrating to the wounded metal wires.

The wirewound resistors need to be manufactured with a lot of precision and its resistance depends overly on the resistivity of the metal wire used and the length of that metal wire. The resistivity of the metal wire helps define the resistance that the wirewound resistor will have. Where the resistivity is high, large amounts of electric current are restricted all at once. Therefore, where the resistivity of the wire is high, the power resistor will be able to block the electric current tremendously. The length of the metal wires matters great a deal and there is deal to always have a long metal wire. The longer the metal wire, the higher the resistance as free electrons will have to travel the long distance making it possible for these electrons to collide with atoms. You’ll want to be familiar with custom wirewound resistor options. 

The last but not the least, there is need for you to understand that there are two types of wirewound resistors. The first type is power wirewound resistor and this is ideal where the temperatures are high. The second type is precision wirewound resistor and its ideal where accuracy is fundamentally required and where the temperatures are low.

[powerresistorsales-blog]

Common Practical Applications of Power Resistors

Power resistors are come in handy for the safe conversion of electrical energy to heat energy. They work by dissipating power, hence protecting the devices involved.

Power resistors have varied applications and here are some that you might find most practical and useful in our world today:

Resistance Heaters

Resistance heaters are very common in places with temperate climates, ranging from 1 to 2kW and running on 115 or 230VAC. There are resistance heaters that are radiant while some are forced air. Although some manufactures claim they make the most efficient resistors, all resistors can actually delivery 100% efficiency in converting electrical energy to heat energy. Any efficiency takes places during the power generation process, and this has something to do with the Rankine cycle steam system efficiency. Do check out wirewound Resistor company info today. 

Ballast Resistors

Ballast resistors offers an option for load current balancing in a number of branches of semiconductor circuits. This is necessary since semiconductors have range of forward voltage drops on top of a negative temperature coefficient of voltage. This is the reason why sharing of current among parallel connected devices is very poor, with only one device likely to take all the current. This also happens with paralleled LEDs. The design is intended to minimize the voltage drop across the resistors so that the highest efficiency is maintained, while keeping it high enough for acceptable current sharing. Make sure to check power resistors company now. 

Snubber Resistors

Snubber resistors take in current transients produced by abrupt voltage changes. These are generally connected across semiconductors to help shield them from the damaging effects of voltage transients. To lower average power dissipation, a capacitor is connected with the resistor in series. A non-inductive resistor element is fundamental. Typical snubber resistances range from 50 to 200Ω. Power ratings are normally below 10W. A polarized snubber is a diode connected across the resistor in semiconductor applications.

Inrush Current Limiting Resistor

You might have observed a zap or crack as you connected power to a capacitor limited power supply. This is due to the high peak current with which limiting resistor is charged initially. This problem can be minimized through a low value of resistance connected in series with the circuit. This resistor has to safely absorb a high peak power or energy. Film type resistors are usually unreliable for such application and shoudl thus be avoided. Experts do recommend carbon, wirewound, or ceramic composition resistors instead.

Dummy Loads

Lastly, there have been several circuit experiments that involved simulated instead of actual loads, including the the 50Ω dummy load for a transmitter. With a dummy load, spurious signals from an antenna can be prevented. These resistors are usually carbon composition resistors paralleled between two plates, providing a non-inductive load at radio frequencies.

As mentioned, there are more practical applications of power resistors in our society today. There is much out there to be explored, but these are some of the most common applications that you may find interesting to start with.

[powerresistorsales-blog]

Information about Wirewound Resistors

The number of electronic applications, instruments and equipments using wirewound resistors is on the rise and there are very few people who understand what these wire wound resistors are. Therefore, this article embraces the responsibilities of enlightening you on what wirewound resistors are and why they are considered ideal for electronic applications like computers, telecommunication devices and even video and audio equipments.

First, there is need for you to understand what wirewound resistors are. A wirewound resistor is a type of reflexive component that uses metal wires to block electric current to creation levels. Basically, the resistor has a resistance material and a non-conductive material. The resistance material is the metal wire which is normally wounded on the metal core. The metal core is the non-conductive material. When it comes to the metal wire, manganin and Nichrome are the most preferred materials as they are able to operate tremendously even in high temperatures and they have high resistivity. Plastic, ceramic and fiberglass are the most ideal materials for metal core and they are the best non-conductive elements available. There is need for the metal wire to be insulated after being zigzagged on the metal core. Insulation plays an integral role and it ensures to keep outside heat from penetrating to the wirewound resistor. Where the external heat is blocked, the stability of the power resistor is enhanced hence performing its tasks tremendously even where there are extremely high temperatures. Do check out high power resistor info. 

Wirewound resistors company ensures to adhere to two ideologies or rules when manufacturing these resistors. One, they have to use a high resistivity wire and at the same time, ensure to have a lengthy metal wire; the higher the resistivity, the higher the resistance and at the same time, the longer the metal wires, the longer the distance that the free electrons available have to travel giving atoms a golden opportunity to collide and eliminate these electrons.

There are two types of wire wound resistors and each type has an integral role to play. First, there is the power wirewound resistor and this resistor will always work tremendously where the temperatures are high. The second type is the precision wirewound resistor and the precision resistor works best where accuracy is indispensable. At the same time, the precision wire wound resistor will always work or rather perform tremendously where the temperatures are low. You’ll want to know more about current sense resistor info. 

There is more to benefit where you settle for wirewound resistors. Basically, they are affordable and overly accurate. The stableness of these resistors is tremendous and it ensures that the electronic application is performing alluringly and as designated.