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There is a commonly held belief in the industry that GaN devices are wasted on inverters for electric motors. After all, if the performance of the system is restricted by the use of a 20KHz PWM, then there can be little benefit in using a material that gains the majority of its advantages from faster switching speeds. However, according to Marco Palma, Director of Motor Drives Systems and Applications at EPC, there are some ways that GaN can still prove effective in that role.
Power Systems Design
September, 2022
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GaN transistors and ICs allow increasing power density in motor drive applications by eliminating electrolytic capacitors in the input filter. The superior switching behavior of GaN helps to remove dead time and obtain un-matched sinusoidal voltage and current waveforms for smoother, silent operation.
Bodo’s Power Systems
April, 2021
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