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Automotive Blower Resistor

Automotive Blower Resistor

Blower resistors are resistors which are used to control the fan speed of automotive blowers. The fan speed can be changed either by switching the blower resistor resistance mechanically, using a rotating lever, or electronically by the air conditioning system. The change in resistance then limits the current through the motor, which dictates the speed at which the blower fan works. Blower resistors, being a mechanical component, are prone to wear and are the most common point of failure in a cars heating system. This article...

Date:2019-07-16      [More+]
High Performance Resistors for Power Supplies

High Performance Resistors for Power Supplies

Microhm has been committed to supporting the high-voltage and precision needed by the power supply industry. We provide many market leaders with standard and custom products. Our surface mount resistors can withstand voltages up to 250V like LMK series and our leaded resistors are designed to operate up to 3kV, such as LSP series. There are a vast array of power supplies on the market, and the variety of resistor applications in those designs broaden the selection dramatically. Whatever the application, power supply designers...

Date:2019-07-15      [More+]
Precision and Power Wire Wound Resistors

Precision and Power Wire Wound Resistors

Wire wound resistors can roughly be classified in two types: power and precision. They can be modified for use in current and temperature sensors and potentiometers. These versatile resistors can be used in a wide range of applications. Wire wound resistors exist for very high power applications. The range varies from 0.5 watts till more than 1000 watts. Power wirewound resistors can be divided in types according to the coating type. Silicone resins are used for the lowest dissipation levels. They are compact resistors that c...

Date:2019-07-12      [More+]
Film Resistors' Technology

Film Resistors' Technology

Film Resistors mainly include thin film resistors, thick film resistors, metal film resistors and metal oxide film resistor. Thin and thick film resistors are the most common types in the market. They are characterized by a resistive layer on a ceramic base. Although their appearance might be very similar, their properties and manufacturing process are very different. The naming originates from the different layer thicknesses. Thin film has a thickness in the order of 0.1 micrometer or smaller, while thick film is around thou...

Date:2019-07-10      [More+]
Microhm's Current Sense Resistor

Microhm's Current Sense Resistor

Current sensing products, the majority are surface mount, are the favorites among resistive products. These resistors, often referred to as shunt resistors, are used to monitor the current in a circuit and translate the amount of current in that circuit into a voltage that can be easily measured and monitored. Such resistors have very low resistance vales, typically less than 10 milliohms and often lower. When designing power supplies and regulated battery circuits, the aim is to eliminate the risk of short circuits or over c...

Date:2019-07-10      [More+]
Braking Resistors Working Principle

Braking Resistors Working Principle

In general, resistors consume heat. By doing this, they can be used to stop or slow down a mechanical system. This type of resistor is called a dynamic braking resistor and the process is called dynamic braking. When kinetic energy is transformed back into electrical energy you can slow down or decelerate an electric motor. This energy is dissipated by using a power resistor. The brake resistors usually have a high power rating and relatively low ohmic values. A suitable solution is the Wirewound Resistor. Usually, they have ...

Date:2019-07-09      [More+]
Non-Inductive Resistors Applications and Features

Non-Inductive Resistors Applications and Features

Non-inductive resistors are used in home entertainment, appliances, high voltage, high-switching, welders, power supplies, power tools, current sensing and consumer applications. DC circuits dont have to worry about the inductance of a resistor since there isnt any fluctuation in the current to create the altering magnetic fields, while when it comes to AC circuit, we need to take it into account. The induction of a resistor is a very important item to keep in mind when building a circuit, especially if you are dealing with s...

Date:2019-07-05      [More+]
4 Terminal Kelvin Resistors

4 Terminal Kelvin Resistors

A Kelvin configuration resistor features four leads or terminations. These four terminal resistors enable current to be applied through two opposite leads and a sensing voltage to be measured across the other two leads. The Kelvin configuration effectively eliminates the resistance and temperature coefficient of the leads. The Kelvin connection can also simplify board design by incorporating all terminals for the sensing circuit into one part. A Kelvin connection is essential for accurate current sensing and simplified board ...

Date:2019-07-04      [More+]
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