Gallium Nitride semiconductor devices are a good alternative to Silicon semiconductors in motor inverters for variable frequency drives. Compared to traditional inverters based on IGBTs or MOSFETs the (PWM) frequency for efficient operation can be increased by a factor of 5 to 10, extending the PWM frequency range up to 500 kHz. This allows the use of motor filters with small component size. As a result, high motor efficiency, low torque ripple, high control bandwidth and nearly ideal sinusoidal output voltages are achieved. The idea is to design a sine wave filter consisting also from digital part. The filter will be optimized to achieve low power loss. A 3-phase GaN motor inverter operating at 100-200 kHz PWM frequency at 50 V DC-link voltage with sinusodal filter will be designed.
This idea will get a TAPAS dev kit.