Technical Features

July 2022
Driving Wide Bandgap Devices

Click image to enlarge

­In power electronics, semiconductor transistors with a wide bandgap, such as silicon carbide or gallium nitride, are becoming increasingly popular. Higher switching speeds promise higher efficiency and higher power densities. Two reference designs from Würth Elektronik show how an isolated 6 W auxiliary power suppl
. . . Read More
Date:
10/01/2022
Electric Vehicle Component Testing using AZX Regenerative Grid Simulators

Click image to enlarge

Figure 1. Electric Vehicle Testing

­Besides costs, one of the major obstacles for most consumers preventing them from adopting electric vehicles over IEC vehicles is range anxiety. Although great strides have been made in efficient energy conversion and battery power density, a typical range of 200 to 300 miles for most EV’s is still less th
. . . Read More
Date:
07/05/2022

Next-Generation Battery Management System Architectures

Click image to enlarge

Next-Generation Battery Management System Architectures

­DC fast chargers take between 30 to 45 minutes to charge the battery to 80 percent. This fast charging process generates a significant amount of heat, because the internal resistance to the high current generates a temperature rise. For a typical 400 V EV battery, therefore, the charging rate is limited by se
. . . Read More
Date:
07/01/2022
More Bang for Your Boost

Click image to enlarge

Figure 1. Evaluation kit of the ADP1612

­The ADP1612 is a low-cost, high-efficiency boost converter that operates at 1.3MHz. It has a shutdown pin that reduces the quiescent current to less than 2 μA and operates with an input voltage down to 1.8 V making it ideal for battery-powered electronics. However, as the battery voltage drops, it
. . . Read More
Date:
07/01/2022
Why Lithium is Taking Over Stationary Energy Storage

Click image to enlarge

Figure 1: This chart contains the most common commercialized sub-chemistries of lithium-ion batteries. Different applications require different performance characteristics and can be better served by selecting the correct chemistry.

­Today, you don't have to look very far to find a device that is powered by a lithium-ion battery. Chances are, you've got one in your pocket, or sitting somewhere on your desk. You might be reading this article using a lithium-ion powered device! Lithium-ion batteries are the hidden power source behind billions of c
. . . Read More
Date:
07/01/2022
Application of Power MOSFET in Battery Management Charge-Discharge System

Click image to enlarge

Figure 1. Battery protection board circuit diagram

­Power MOSFETs are required to be connected in series between the inside of the lithium-ion battery pack and the output load. At the same time, the dedicated IC is used to control the on and off of MOSFET for managing the charge and discharge of the battery, as shown in Figure 1. In consumer electronic systems, su
. . . Read More
Date:
07/01/2022
Analog and Power Management Solutions for Asset Tracking

Click image to enlarge

Figure 1: The major functional blocks of a battery-powered wireless connected asset tracker – key analog functions are highlighted in the shaded areas (source ST)

­The internet of things has already transformed many business operations and consumer services, and the development of battery-powered wireless connected asset trackers continues the adoption of IoT technologies. An asset tracker contains circuit functions to determine its position and communicate the locatio
. . . Read More
Date:
07/01/2022
Power Supply Eliminates Electricity Metering Tampering

Click image to enlarge

Figure 1: With a properly designed transformer, this flyback power supply continues to operate in the presence of an external magnetic field

­Tampering with an electricity meter can be as simple as placing a strong magnet near the power supply transformer. The applied magnetic field can disrupt power conversion and hinder the meter’s ability to accurately monitor electricity usage. Using a magnet to disable an electricity meter is especially eff
. . . Read More
Date:
07/01/2022
The Value of a Modular Design for Protection Testing Schemes

Click image to enlarge

Figure 1. A modular platform can house different power sources and logical inputs and outputs to expand testing capabilities

­Power and utility companies are making unprecedented investments in substation automation and going further with implementations of the IEC 61580 standard in their substation network designs. There are certain drawbacks to modernization when it comes to protection testing. The vast majority of protective r
. . . Read More
Date:
07/01/2022
Making the Business Case for UPS

Click image to enlarge

Figure 1. A SolarEdge data center, which uses a UPS as a kind of insurance policy

­Uninterruptible power supply (UPS) systems are generally thought of as insurance policies for companies and institutions with critical power requirements such as hospitals, research facilities, laboratories, data centres, manufacturers, healthcare, government, academic, research, and transportation facilities, provi
. . . Read More
Date:
07/01/2022
The Dawn of a New Era with High-Power Wireless Charging

Click image to enlarge

Figure 1: Wireless power transmitter system with WLC1115

Overview of Inductive charging and Qi specification Wireless charging technologies range from inductive, magnetic resonant, and capacitive to RF radiation, laser, acoustic, and other emerging ones. The inductive coupling technology is the front runner [1], and hence its associated standard Qi is the most pre
. . . Read More
Date:
07/01/2022
Archives