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The use of current sense resistors, such as Microhm Electronics shunt resistors, is part of a trend in motor control system design that benefits from adopting new digital isolation technologies. These technologies offer higher reliability levels to designers based on the introduction of the component level standard IEC 60747-17, which specifies the performance, test, and certification requirements for capacitive and magnetically coupled isolators. Digital control of a motor drive incorporates current sense resistors for sensi...
Date：2020-01-03 [More+]
In almost all new vehicles, an electronic engine control module teams with sensors and actuators to constitute the engine control system where film resistors play important roles. Piezoresistive transducers implanted in a silicon wafer with bulk micromachined diaphragms have become the dominant technology for producing automotive pressure sensors. Initially an absolute, bulk micromachined, piezoresistive pressure sensor element with a backside constraint for the formation of a vacuum reference cavity--a necessary element for ...
Date：2020-01-02 [More+]
Microhm Electronics expandeds its line of high-power wirewound resistors with the new LHR series of rugged metal-clad braking resistors that target industrial and commercial applications such as motor drives, power conversion systems, HVAC systems, and battery charging and monitoring applications. The LHR series, encased in aluminum and offer a power rating of 300 watts. These rugged resistors provide excellent heat transfer and reduce the need for heatsinking. They are also significantly less sensitive to heatsink requiremen...
Date：2019-12-31 [More+]
There are a vast array of power supplies on the market, and the variety of resistor applications, such as high voltage resistors, anti-surge resistor, non-inductive resistors, in those designs broaden the selection dramatically. Whatever the application, power supply designers must be aware of specific regulations on safety or the environment that apply to the area, as well as the actual electrical performance. The nomenclature of power supplies is often taken from whether the input is AC or DC, and what type of regulation is...
Date：2019-12-31 [More+]
LEDs are constant current devices with a predictable forward voltage drop based on the amount of current flowing through them. These current-voltage (I-V) curves are available in the datasheet for specific LEDs. If you want to drive a green LED with a forward voltage of 3V off a 5V power supply, you need something in that circuit to absorb the extra 2V. If you do not absorb that extra voltage, the LED junction will try to draw enough current to increase that voltage to 5V and burn itself up. The easiest way to absorb extra po...
Date：2019-12-30 [More+]
After an extended period of long lead times and robust demand, suppliers of passive components such as capacitors, resistors and inductors are now bearing the brunt of a weakening electronics market that is manifesting itself in slackening sales of electronics goods and prompting suppliers to lower quarterly forecasts. As electronic product design cycles typically involve the specifying and design-in of passive, interconnect, and electromechanical components later than semiconductors, suppliers of those parts typically feel a...
Date：2019-12-30 [More+]
The basics of electronics involve calculating the equivalent resistors in series or parallel. The designer learns the resistance of resistors in series is the sum of all the resistances, and when mounted in parallel, the inverse of the final resistor is equal to the sum of the inverse of the resistors. Micrhom Electronics provides broad range of resistors for engineers options. In the second step, designers learn that two resistors in series create a voltage divider. If one of these resistors is an NTC (Negative Temperature C...
Date：2019-12-30 [More+]
Resistors, no matter chip ones or through-hole ones, are a fundamental component in electrical circuits. Early scientists came to understand the concept of resistance shortly after they were conducting tests to determine the results of passing electricity through all kind of materials and subsequently discovered electrical current. While copper, gold, and aluminum were found to be great conductors with low resistance, air, mica, and ceramics were considered resistors because of their ability to greatly limit the flow of elect...
Date：2019-12-27 [More+]
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