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The difference between active and passive filters

Any electronic system has its own frequency bandwidth (limit to the highest frequency of the signal), and the frequency characteristics reflect the essential characteristics of the electronic system. The filter is an engineering application circuit designed according to circuit parameters’ influence on the circuit’s frequency bandwidth. Everyone knows that there are many filters, and the easiest way …

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Microgrid

Microgrid: The Key Concept

With the rapid development of the national economy, electricity demand has also increased rapidly, and the power grid structure has become increasingly complex. The traditional power grid structure of centralized power generation and long-distance transmission of large power grids is also facing more and more challenges. The cost is high, the operation is complex, and …

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new EV battery from China.

A new EV battery from China can travel 1,000 miles on a single charge.

A Chinese company showed off a record-breaking electric vehicle (EV) battery on Thursday. It has a volume utilization efficiency of 72 percent, an energy density of up to 255 watt-hour/kilogram (Wh/kg), the world’s highest integration level, and can go more than 1,000 kilometers on a single charge. The battery, called Qilin, after a legendary creature …

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Internet of Things

Brief Idea on Internet of Things (IoT): Technology, Applications, and Future Trends

The Internet of Things (IoT) refers to objects in the physical world equipped with an IP address allowing devices to communicate wirelessly to collect and exchange data. The Internet of Things has become an integral part of our lives as we can connect with the Internet even if we’re away from home or office. However, …

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thermal overload relays

Why is both RTD temperature and thermal overload protection needed?

Although both methods give protection against overload and thermal rise, both have their own pros and cons. Especially with the important objects, both methods are used because they complement each other. RTD basics We know metal has the property of varying resistivity with respect to temperature. This relationship is linear for some metals, over wide temperature …

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