![]() ![]() If the standby power consumption of the converter is too high, it will cause excessive energy loss. Since the sensor does not operate for all days, it means they are mostly in standby mode. These devices require a power converter to provide power. This is very important for some IoT or smart home devices that operate primarily in standby mode, such as sensors or electric curtains, door lock systems, and so on. AC/DC converters have high efficiency, which means there is less energy loss during operation.Īn AC/DC power supply has low standby power consumption. High efficiency has always been one of the features pursued by various manufacturers when it comes to power converters. Therefore, AC/DC converters manufacturers need to keep up with this trend. The latest smart devices are designed as increasingly compact, lightweight, and simple to install. The points below should be taken into consideration when selecting a power supply for industrial automation, IoT, and smart appliances. During the process, an AC/DC power supply has more than one duty:ġ. Transforming AC from a mains supply into a steady DCĢ. Preventing any AC from interfering with a DC supply outputģ. Keeping output voltages at a constant level In short, AC/DC power supplies take power from AC power and convert it into a stable DC for use in electronic devices. The filter will maintain a steady and clean output voltage that matches the peak of the original AC input wave. The job of a filter is to remove AC ripples in the output voltage, leaving a smooth DC voltage. The worst result is the entire circuit will be destroyed. ![]() If waveform fluctuation passes into the power supply’s output, the load will be damaged. After that, waveform fluctuation still needs to be removed. When converting AC to DC, the voltage will be rectified by the use of diodes which transform the sinusoidal AC wave into positive peaks using a rectifier. The transformer changes the voltage to the amount needed by the device that is being supplied. Usually, transformers are used as the power supplies to change the voltage of the AC, saving it from AC to DC. Here below, we will introduce more detailed information about AC/DC converters.ĪC/DC power supplies are commonly deployed in situations where many devices need to be powered, or there is a need for more efficient power generation. For example, in a smart home, power devices implement efficient hardware for AC/DC conversion to mitigate energy losses and achieve significant cost savings. AC/DC converters are used in industrial process control systems, consumer devices, measurement equipment, semiconductor manufacturing equipment, medical devices, and defense applications. There are a lot of real-life applications that are based on this conversion. This power electronic technology processes and controls the flow of electrical energy to supply current and voltages in a form that is optimally suited for the end user's requirements. AC/DC Converters are also called “rectifiers” they convert the input AC voltage to variable DC voltage, then optimize it through a filter to obtain an unregulated DC voltage.ĪC/DC power supplies have become indispensable in life in recent years, due to the development of power electronics technology. ( 0 <= Efficiency <= 1.AC/DC converters are electrical circuits that transform alternating current (AC) input into direct current (DC) output. Watts_Out = Watts_in x Efficiency ( 0 <= Efficiency <= 1.0) Q: "you mean that for 90W or 75W DC out we will need 100W AC input?"ĭC_Watts = 75% AC_Watts so AC_Watts =. So Watts out DC = 75% to 90% of AC Watts in in most cases. More than 90% efficiency is possible with special care. If a switching power supply is used the overall efficiency is liable to be in the 75% to 90% range. If a bridge rectifier is used there are two diodes in the circuit and this can account for over 20% efficiency loss. As a silicon diode drops 0.6V or more, a single diode can account for (0.6V/(5+0.6)V) ~= 11% efficiency loss. Rectification efficiency depends on voltage and diodes used. Using a conventional iron transformer the AC mains to AV low voltage conversion probably is > 95% efficient. Power level and voltage also give an effect. The efficiency of conversion depends on the technology. Summary: Watts out DC = 75% to 90% of AC Watts in, in most cases.Īt 100% efficiency ADC Watts out = AC Watts in.Įnergy is 'conserved" and energy = Watts x time.Įg we often measure energy in conds = Watts x seconds operated = Joules.
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