Country for PR: Japan
Contributor: Kyodo News JBN
Wednesday, November 20 2019 - 18:00
Diamond Electric Develops Three-port Power Conversion Technology
OSAKA, Japan, Nov. 20, 2019 /Kyodo JBN-AsiaNet/ --

- Downsizing and Cost Reduction of Power Conversion Systems Seen Contributing 
to Penetration of EVs, Hybrid Inverters - 

Diamond Electric Mfg. Co., Ltd. announced on November 20 that it has developed 
a three-port power conversion technology with which a single power converter 
performs power conversion across three different voltage levels. This 
technology integrates multiple power conversion systems and contributes to 
downsizing and cost reduction, which are essential for environment-friendly 
equipment such as electric vehicle (EV) chargers, solar inverters and hybrid 
(PV+battery) inverters.


In environment-friendly equipment, multiple voltage levels may coexist within 
equipment for reasons such as the characters of devices used, the utilization 
of existing models, and safety. Conventionally, dedicated power converters for 
every voltage level were used, which resulted in the large size and cost of a 
final product or system.

In response, the three-port power conversion technology developed by Diamond 
Electric enables a single power converter to perform power conversion across 
three different voltage levels. The technology of integrating multiple power 
converters into one is expected to reduce the size and cost of a final product 
or system.

By adopting a Triple Active Bridge (TAB) topology, all three ports are capable 
of bidirectional power conversion. This feature makes the technology highly 
compatible with environment-friendly equipment such as a battery system that 
supports both charging and discharging operations and a utility interactive 
system that supports both the selling and buying of electricity.

Expected applications
- Onboard charger integrated with low-voltage DCDC converter for auxiliaries.
- Onboard charger integrated with isolated DCDC converter for AC power supply 
in the vehicle

Environment-friendly equipment:
- Hybrid inverters
- EV station with battery
- Uninterruptible power supply (UPS)
- Power router


About Diamond Electric Mfg. Co., Ltd.
As a core member of Diamond Electric Holdings (listed on the Tokyo Stock 
Exchange (6699)), the company is a leading manufacturer of ignition coils for 
automobiles, operating for more than 80 years. It also designs and manufactures 
a variety of DCDC converters, such as solar inverters, onboard chargers and 
onboard DC/DC converters.
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Source: Diamond Electric Mfg. Co., Ltd.