Hitachi and Hitachi Astemo Developed Thin-type Inverter Technology for EVs That is More Compact and Energy Efficient – QNT Press Release

New structure with simplified wiring improves production efficiency and reduces CO2 emissions

TOKYO, May 25, 2022 – (JCN Newswire) – Hitachi, Ltd (TSE: 6501) and Hitachi Astemo, Ltd. have developed basic technology for a thin-type inverter that achieves both energy conservation and miniaturization as a power converter (inverter) for electric vehicles (EVs). This technology simplifies power wiring by integrating power semiconductors(1) that control power supply with printed circuit boards. Compared to conventional products, the thin-type inverter reduces energy loss when power semiconductors are switched by 30% and is approximately 50%(2) smaller. The new design eliminates the need for welding of power semiconductors and power wiring, and the number of components and assembly processes required are also reduced. As a result, throughout the lifecycle of the inverter, including the production process, CO2 emissions are reduced.

Hitachi and Hitachi Astemo will accelerate efforts to commercialize the thin-type technology inverter, and Hitachi will contribute to the realization of a carbon-neutral society by applying this technology to a wide range of applications, including not only EVs but also EV fast-charging systems and power transmission systems.

The electrification of automobiles is rapidly advancing as the world aims towards a decarbonized society. Inverters are an essential component of EVs, converting DC power from the battery to AC power and controlling the rotation of the motor. Inverters are also important components for the effective use of energy, including fast-charging systems for EVs and power transmission systems for renewable energy. As the introduction of EVs and renewable energy increases in the future, inverters with conventional structures will require larger power semiconductors and peripheral components to control the power supply, which will increase energy loss and complicate the assembly process.

Hitachi and Hitachi Astemo have been providing inverters for …