What applications are best served by having a regenerative drive?
Craig: Drives that cycle (start/stop) often and drives that used where loads cause the motor to generate (crane hoist, elevator, unwinder) are prime targets
Do newer drives have a longer life expectancy? what's the payback -how long untill ROI = upfront cost?
Craig: From the early 90"s the dependability of AC drives has increased and now they are at a very high level. Keeping your drives cool and not cycling power has always been two factors to increase the life expectancy of any drive or electronics equipment in general.
I believe you said that Servo-motors are more efficienct that induction motors. Barring cost, can Servo-motors be used as a replacement in most applications. (I understand that you need to change the driver as well).
Craig: There are some universities doing comparison studies on this to test both technologies on the same load. The servo motor is more efficient but the application will make a difference in what the exact payback will be.
Bart Bartolucci again. with the more energy efficient IGBT drives (VFDs), are the output voltages still as high as 2 to 3 times VBUS, as the older drives.
Craig: The reverse voltage has not changed much but typically with long motor cable lenghts there will still be standing waves.
I believe you said that Servo-motors are more efficienct that induction motors. Barring cost, can Servo-motors be used as a replacement in most applications. (I understand that you need to change the driver as well).
Craig: There are some universities doing comparison studies on this to test both technologies on the same load. The servo motor is more efficient but the application will make a difference in what the exact payback will be.
Do newer drives have a longer life expectancy? what's the payback -how long untill ROI = upfront cost?
Craig: From the early 90"s the dependability of AC drives has increased and now they are at a very high level. Keeping your drives cool and not cycling power has always been two factors to increase the life expectancy of any drive or electronics equipment in general.
Bart Bartolucci again. with the more energy efficient IGBT drives (VFDs), are the output voltages still as high as 2 to 3 times VBUS, as the older drives.
Craig: The reverse voltage has not changed much but typically with long motor cable lenghts there will still be standing waves.
Can you point me to some user groups where I can learn more about energy efficient motors?
Craig: We have a Siemens user group I can put you in touch with and also a forum on our Service & Support site. IEEE is also a good source of information
Do newer drives have a longer life expectancy? what's the payback -how long untill ROI = upfront cost?
Craig: From the early 90"s the dependability of AC drives has increased and now they are at a very high level. Keeping your drives cool and not cycling power has always been two factors to increase the life expectancy of any drive or electronics equipment in general.
Do newer drives have a longer life expectancy? what's the payback -how long untill ROI = upfront cost?
Craig: From the early 90"s the dependability of AC drives has increased and now they are at a very high level. Keeping your drives cool and not cycling power has always been two factors to increase the life expectancy of any drive or electronics equipment in general.
I believe you said that Servo-motors are more efficienct that induction motors. Barring cost, can Servo-motors be used as a replacement in most applications. (I understand that you need to change the driver as well).
Bart Bartolucci again. with the more energy efficient IGBT drives (VFDs), are the output voltages still as high as 2 to 3 times VBUS, as the older drives.
Craig: The reverse voltage has not changed much but typically with long motor cable lenghts there will still be standing waves.
Bart Bartolucci again. with the more energy efficient IGBT drives (VFDs), are the output voltages still as high as 2 to 3 times VBUS, as the older drives.
Craig: The reverse voltage has not changed much but typically with long motor cable lenghts there will still be standing waves.
Bart Bartolucci again. with the more energy efficient IGBT drives (VFDs), are the output voltages still as high as 2 to 3 times VBUS, as the older drives.
Bart Bartolucci again. with the more energy efficient IGBT drives VFDs), are the output voltages still as high as 2 to 3 times VBUS, as the older drives.
Bart Bartolucci of the Okonite Company. what improvements in the drives have been made to reduce common mode currents. our understanding is that a symmetrical power cable; ie 3 power conductors and 3 grounds under a common metallic sheath is best for this. has anything changed regarding this design concept.
MPORTANT NOTE: IF YOUR COMPANY BLOCKS LIVE STREAMING AUDIO -- as a number of companies do -- YOU WILL NOT BE ABLE TO HEAR THE BROADCAST LIVE when it begins at 2pm eastern, in a streaming audio player which appears at the top of this page at that time. You will have to come back and access it as an archive. The archive is posted later today. However, you may want to still stick around for the live chat with our guest; he will dive in at the 2;30 pm EDT mark.
MPORTANT NOTE: IF YOUR COMPANY BLOCKS LIVE STREAMING AUDIO -- as a number of companies do -- YOU WILL NOT BE ABLE TO HEAR THE BROADCAST LIVE when it begins at 2pm eastern, in a streaming audio player which appears at the top of this page at that time. You will have to come back and access it as an archive. The archive is posted later today. However, you may want to still stick around for the live chat with our guest; he will dive in at the 2;30 pm EDT mark.
MPORTANT NOTE: IF YOUR COMPANY BLOCKS LIVE STREAMING AUDIO -- as a number of companies do -- YOU WILL NOT BE ABLE TO HEAR THE BROADCAST LIVE when it begins at 2pm eastern, in a streaming audio player which appears at the top of this page at that time. You will have to come back and access it as an archive. The archive is posted later today. However, you may want to still stick around for the live chat with our guest; he will dive in at the 2;30 pm EDT mark.
MPORTANT NOTE: IF YOUR COMPANY BLOCKS LIVE STREAMING AUDIO -- as a number of companies do -- YOU WILL NOT BE ABLE TO HEAR THE BROADCAST LIVE when it begins at 2pm eastern, in a streaming audio player which appears at the top of this page at that time. You will have to come back and access it as an archive. The archive is posted later today. However, you may want to still stick around for the live chat with our guest; he will dive in at the 2;30 pm EDT mark.
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