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Marco Palma, Director, Motor Drives Systems and Applications at Efficient Power Conversion (EPC), presents how gallium nitride (GaN) inverters are transforming motor control in humanoid robots. In this talk, he explains how fast-switching GaN devices with zero reverse recovery enable higher PWM frequencies, reduced dead times, and the elimination or reduction of electrolytic capacitors. The result is higher efficiency, higher torque per ampere, smaller form factors, and smoother joint operation. Palma details EPC’s reference designs for various humanoid joints - from arms and wrists to hips - covering integrated three-phase modules and high-current discrete solutions that scale from a few hundred watts to several kilowatts.
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