Industries need to review the Power Quality in their electrical infrastructure

Steel,Cement and Renewable energy Industries are being urged to reconsider their supporting electrical infrastructure. We are advising companies to invest in the Emerich Power Quality products. Designed to eliminate pulse-width modulation (PWM) frequencies to protect the electrical infrastructure, the products also increases the efficiency of the drive by improving power quality and it gives plenty of Power Quality benefits 

Regenerative power systems, such as solar panels and wind turbines, require extra care to ensure that the quality of the regenerated power is sufficient enough to be safely passed onto the grid. Often, the power is affected by harmonic distortions, which are generated by the high-speed switching of the power semiconductors in the frequency inverter.

In many instances, the filters being used are not designed to manage the issues that occur during the regenerative stage and, as they don’t appear to be fulfilling their primary function, plant engineers often turn these filters off completely. 

High-performance filters, like the Emerich AHM can be used in regenerative electrical systems to harness the harmonic currents that occur from high electrical frequencies.

Working to remove harmonic distortion from the network, the Emerich AHM filter has been designed so that it features a choke, which blocks higher-frequency alternating current (AC), while allowing direct current (DC) to pass through.

“However, regenerative energy systems often experience issues like harmonic distortions in their main lines, which reduce the overall quality of the energy generated. In addition to this, unresolved power issues can reduce the lifespan of individual components in the electrical infrastructure, like the drives.

“To help renewable energy companies overcome this, we designed the Emerich AHM filter so that it features a choke, which blocks higher-frequency AC power without hindering the flow of DC. The product also features a natural cooling component so that the filter does not overheat while in operation. This increases the overall efficiency of the drive, which in turn reduces energy costs.”

Time for ambient energy harvesting from RF signals

wireless energy harvesting, maybe to help power smart sensors and IoT…

The aim of the project, Chaoyun tells us, is to help develop cutting-edge solutions for energy harvesting from ambient signals, whether mobile, TV or WiFi signals. And as a result he has produced a battery-free quartz clock with wireless sensing functions.

RF

Among all the options, he says, RF energy sources are becoming increasingly popular since they are ubiquitously available in most domestic environments regardless of the time, weather and environmental conditions.

“In this project, we have developed the broadband rectifying-antenna (rectenna) technology, which could capture, rectify and convert the RF power of signals over a wide spectrum into DC power. We have significantly overcome the problems on antenna and circuit integration, in particular, a number of novel impedance matching techniques have been developed for such broadband rectennas.”

“More importantly, we have also invented a cutting-edge technique to effectively integrate the antenna to the rectifying and power management circuit without the need of extra matching networks and circuit components, thus reducing the cost, power loss and manufacturing complexity of the product. This technology has been filed to a US patent (US Patent 9,966,656), and bought by a US company.”

The full details of this work have been published on the IEEE, see “Novel Quartz Clock with Integrated Wireless Energy Harvesting and Sensing Functions“, IEEE Transactions on Industrial Electronics (May 2018).