| Abstract |
Increased productivity in industrial processes can be achieved by dynamic and accurate positioning ofservo drives. Therefore, improvement of servo drive dynamics using latest technologies in the keycomponents such as inverter, control system and position measuring device are investigated. UsingGallium Nitride (GaN) or Silicon Carbide (SiC) semiconductors for motor inverters enables energyefficient operation up to pulse width modulation (PWM) frequencies of 500 kHz. This allows motorfilters with small component sizes. As a result, high motor efficiency, low torque ripple, high controlbandwidth and almost ideal sinusoidal output voltages are achieved. Experiments on a 200 kHzGallium Nitride inverter with sine wave motor filter show a current control loop bandwidth of 3.2 kHzand almost ideal sinusoidal phase voltages. The achieved bandwidths of the speed and position controlloops are 318 Hz and 106 Hz, respectively. |
