Realization of High Power Density AC Servo Drive System Using GaN Power Device

The wide band gap (WBG) semiconductors such as Gallium Nitride (GaN) and Silicon Carbide (SiC) have characteristics of the low on-resistance and the high-speed switching for Si semiconductor. This paper proposes the Integrated Servomotor that integrates an AC motor with an amplifier miniaturized by adopting GaN power devices. Experimental results show the usefulness of GaN power devices in motor drive systems and the effect of the Integrated Servomotor on drive systems.