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Mar 10th, 2012
Mitsubishi integrates SiC-based inverter with 70kW EV motor system
Mitsubishi Electric Corp developed a motor system whose output power is more than 70kW for electric vehicles (EVs) by integrating an inverter and a motor on the same axis.
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The volume of the new system is only half that of the company's motor system whose inverter and motor are separated, which was exhibited at the 42nd Tokyo Motor Show 2011. The integration enabled to shorten electric lines between the inverter and motor as well as to integrate pipes for water cooling that are required for each of the inverter and motor in the old system.

The mass of the new system is about 10% less than that of the old one. And the total efficiency of the new system is 3-5 points higher than that of the old system under the JC08 test mode.

"(To integrate the inverter and motor,) the most difficult challenge was to prevent heat generation," Mitsubishi Electric said.

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