Calculate Inrush Current in Three Steps

Equations to Calculate Inrush Current

Why do I need to Use Inrush Current Calculators to Select an Inrush Current Limiter? Inrush current is defined as the maximum instantaneous surge of current which is drawn by an electrical device at initial switch-on. Limiting the inrush current with the use of Inrush Current Limiters is crucial to the efficient operation of a given device and the selection process includes inrush current calculators. Switching power supplies, DC motors, … Continue Reading

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Thermistor – Temperature Detection Fire Alarm Example

NTC thermistors for temperature detection

Thermistors serve a crucial role in temperature detection. For example, thermistor temperature detection can be used in fire alarms to detect fires based on a sudden change in temperature. Unlike photoelectric detectors or ionization alarms, thermistors only require heat to activate. Thermistors are temperature-sensing elements made of semiconductor material that displays large changes in resistance in proportion to small changes in temperature. Photoelectric and Ionization Fire Alarms The photoelectric detector requires heavy smoke … Continue Reading

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Alternative Energy Applications for MS35 Inrush Current Limiters

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Application Overview Ametherm’s MS35 series inrush current limiting thermistors play a key role in alternative energy applications by avoiding current spikes in the power generated by wind turbines, solar panels, and other sources as it’s fed into batteries, inverters, and other energy storage components. The MS35 devices are also used to regulate the release of battery energy in electric vehicles and in pre-charge circuits for many different types of battery … Continue Reading

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Toroidal Transformer Inrush Current Issues Got You Down? We’ve Got the Answer

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What You Need to Know About Toroidal Transformer Inrush Current Toroidal Transformer Inrush Current can cause some serious damage if not appropriately managed. Inrush current can cause circuit breakers to trip and fuses to blow. Additionally, it can cause a complete failure of the transformer itself. And if that weren’t enough to give you a headache, excessive inrush current can also limit the total number of devices which can be … Continue Reading

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The Secret To Successful Thermistor Beta Calculations

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What Do Rt1, Rt2, t1, and t2 Have In Common? They are the main components of Thermistor Beta Calculations as it relates to temperature measurement, compensation, and control. And if you are an engineer in an industry such as automotive or HVAC where things like coolant and air intake temperatures are crucial to the safety and performance of a vehicle or unit, chances are you will deal with beta calculations … Continue Reading

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How to Limit DC Motor Inrush Current

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Choosing An Inrush Current Limiter To Preserve Your DC Motor So, what does an Inrush Current Limiter have to do with DC motor inrush? More than you may think. DC motor inrush is the maximum, instantaneous input current drawn by the DC motor when first turned on and it is important to know how to limit the inrush current to prevent possible damage to the motor. A DC motor converts electrical energy … Continue Reading

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NTC Thermistors Used In Tesla Hyperloop Pod

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Award-Winning Hyperloop Pod Uses NTC Thermistors A team of engineers use NTC thermistors in their design for a high-speed transportation pod.  The thermistors accurately sense temperatures and create a map of the application’s heat. Teslarati recently conducted an interview with members of the Badgerloop team, 3rd-place winners of SpaceX’s Hyperloop Pod design competition in January.  The Hyperloop is Tesla CEO Elon Musk’s “fifth mode” of transportation where passengers in a … Continue Reading

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Design Guidelines for a Power Factor Correction (PFC) Circuit Using a Capacitor and an NTC Thermistor

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Objective Ametherm inrush current limiters are used in many applications today that require suppression of surge current when power is first applied to the system. One of the popular applications of Ametherm inrush current limiters is in power factor correction circuits. This article provides a solution for finding the correct power factor correction (PFC) circuit for an inductive load. This solution is suitable for applications such as ballasts, LED drivers, … Continue Reading

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Enabling Higher Power Efficiency through Thermistor-based Temperature Compensation

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By Balaji Santhanam, Hubble Power Systems Mehdi Samii, Ametherm Inc. Originally Published in Power System Design  Magazine  As electronic systems continue to become more compact, temperature plays an increasingly important role in system reliability and power efficiency.  Many engineers are already familiar with how temperature can affect reliability; if a system becomes too hot, device operation can become unpredictable.  Using a simple temperature sensor like a thermistor, the host processor can monitor … Continue Reading

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Thermistors used to Measure Temperature in Lake Tahoe

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Recently, the SFGate released an article about how thermistors are used to measure temperature change in Lake Tahoe. The article states that over the past 40 years, global warming has caused the temperature of lakes to rise, affecting the natural habitat for fish species and algae blooms. Scientists at the Tahoe Environmental Research Center carefully monitor the lake’s temperature using thermistors carried by large ocean buoys. Signals from the buoys transmit data via satellite to scientists at NASA’s Jet Propulsion Laboratory in … Continue Reading

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