Siemens Robicon Perfect Harmony Drives have reached a technical milestone with the introduction of an eight megaWatt Variable Frequency Drive (VFD) that operates with an output frequency of 500 Hz making it the world’s largest high speed VFD.
The Siemens Robicon Perfect Harmony power-cell based multilevel arrangement provides a unique topology that allows operation up to 500 Hz, regardless of the VFD power rating. Tests on the VFD control were set to operate the motor in encoderless vector control with 920 Hz IGBT switching frequency, resulting in an effective switching frequency of 9.2 kHz and a sample frequency of 9.2 kHz. This test drive demonstrated very high quality waveform to the motor with low harmonic distortion. This latest VFD will be used to drive permanent-magnetic motors, such as those found in natural gas processing and transportation applications that require high-speed compression.
The Siemens Robicon Perfect Harmony power-cell based multilevel arrangement provides a unique topology that allows operation up to 500 Hz, regardless of the VFD power rating. Tests on the VFD control were set to operate the motor in encoderless vector control with 920 Hz IGBT switching frequency, resulting in an effective switching frequency of 9.2 kHz and a sample frequency of 9.2 kHz. This test drive demonstrated very high quality waveform to the motor with low harmonic distortion. This latest VFD will be used to drive permanent-magnetic motors, such as those found in natural gas processing and transportation applications that require high-speed compression.
Company info
300 New Jersey Avenue, Suite 1000
Washington, DC
US, 20001
Website:
siemens.com/us/en/home.html
Phone number:
1-800-743-6367
