IISc and Delta Electronics India develop fast charging solutions for EVs

Researchers at the Department of Electrical Engineering at the Indian Science Institute (IISC), Bengaluru and Delta Electronics India (EE) developed a new fast charging solution for electric vehicles (homes).

This new-digit H-Bridge (CHB)-based multi-port DC converter is directly connected to the medium voltage AC (MVAC) electric network. In addition, it eliminates the need for large and expensive line frequency transformers (LFTS), which is trusting by traditional charging stations.

According to IISC, “These stations (traditional) also have more than one transformation phase including acceleration of the current up or down or converting AC to DC.

New transformatives can help to address the increasing power demands of fast charge home stations, which are very important to scale India’s home infrastructure.

“Today’s high-power charging devices are complex with multiple conversion stages between grilled, energy storage and vehicle battery. Our invention simplifies this process and provides a 3-5% improvement in energy efficiency. Megawatt scale, energy saving, a significant decrease in cost and a smaller material leads to a smaller footprint.

Harisyam PV, the first writer and doctoral student at EE, said that such transducers would be useful for stations that need to be charged at the same time.

“A line frequency transformer -based solution to solid state transformers, while the solution is much smaller and more compact than existing solutions,” he said.

In addition to power transformation, a compact two -way charging center facilitates the technology that provides basic advantages. In addition to strengthening multiple vehicles, it provides local charging storage in batteries and can easily be connected to renewable energy sources such as solar panels.

It can serve as a support infrastructure during power outage

Local storage on the batteries allows charging when more than one vehicle at the same time is chargeable when there are sudden high -power demands on the distribution grill. The bidirectional converter can only transfer power from the grill to vehicles, but also transfer from the station to the network under critical conditions. This feature will allow the charging station to work with uninterrupted power supply. It can also support basic facilities such as hospitals during a power outage.

The team built a 1.2 kW laboratory -scale prototype and tested it and found that it was able to provide DC power to charge homes at a efficiency of higher than 95%. Now they are planning to scal the system to process higher loads.

IISC. Beyond home charging, this technology, directly in moderate voltages by providing high -efficiency power transformation, promising for applications in new generation data centers, wind energy systems and railway traction applications, he said.