Mishima Converter Dissipation (IMAGE) Kobe University Caption The Kobe University-developed direct current voltage boost converter has much reduced electromagnetic noise and a high energy efficiency of over 91 percent, which is unprecedented for a MHz drive with high voltage multiplier ratio. This ratio is also more than 1.5 times higher than existing designs. Credit MISHIMA Tomokazu Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.