Snubber Resistor Design For Motor Control Applications

The purpose of snubber circuits is the suppression of voltage spikes that otherwise may damage sensitive electronic components.

Thick Film Resistor In Radar Applications

RADAR systems may be complex but their operation relies on a range of relatively simple resistor components. Resistors are used in pulse forming, sensing, switching, current limiting and RF termination applications, among others.

In the late 1800’s Heinrick Hertz proved that radio waves travel in a straight line and are reflected by a metal object. In RADAR equipment a pulse of high frequency radiation is emitted, based on the time and direction of the returning pulse the distance and direction of a metallic object may be calculated.

High Power Resistor Design and Manufacture

When choosing a high power resistor for any demanding application Thick Film resistor technology offers high performance at a relatively low cost.  The technology delivers high packaging density, excellent heat dissipation and low inductance.

Thick Film Resistors Vs Thin Film – A Comparison

What are the advantages of thick film resistors over their thin film cousins? In this post, we consider the ideal resistor and discuss how both thin film and thick film resistors compare with that ideal.

The Ideal Resistor

The perfect resistor has zero capacitance and inductance. Its resistance value is precisely known and does not vary over its entire in service life regardless of any external environmental factors such as moisture or temperature.

Thick Film Resistor Design Considerations

When designing any electronic system there are compromises to be made in component selection. This extends to what may be perceived as the simplest components including resistors and capacitors. In this post, we consider typical thick film resistor design and application issues the system designer needs to consider.

The Perfect Resistor

Power Resistors In Current Sensing Applications

Power resistors are used in a variety of power electronic applications as load resistors, braking resistors and pulse management devices but one of the main applications is current sensing elements in power supplies and electric motor control.

When designing power supplies one of the key design challenges is minimising overcurrent and short circuit conditions that may damage sensitive electronic components used in the motor control circuitry. These overcurrent conditions can be caused by a number of factors including motor start-up conditions and high power switching.

Replacing An Obsolete Resistor

Electronic component obsolescence has been a major issue for high reliability equipment manufacturers (and increasingly standard equipment manufacturers) for many years. Although many manufacturers now have robust obsolescence management processes in place the rate of obsolescence is increasing and it can be difficult to keep pace.

How To Select The Best Resistor Technology For Specialist Applications

When choosing the best resistor technology for a specialist application it is important to go further than a simple review of datasheet parameters. The datasheets covering several different resistor constructions may appear to be similar but it is important to understand the advantages and disadvantages of each resistor manufacturing method.

How To Select A High Power Pulse Resistor

A surge or pulse condition may be defined as the application of a short term power level that exceeds the rated continuous power rating of the component. Due to their transient nature pulse events can be difficult to identify and quantify. Some design engineers, therefore, take a cautious approach and over design circuits and components to accommodate a pulse event.

High Power Heater Resistor Design

A high power heater resistor is often used in where the designer needs to apply a highly controlled level of heat to a small area such as in medical and laboratory fluid heating applications. They may also be used in more general applications such as condensation management, and anti-freezing in electronic equipment.