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Thanks so much for a great Design News Radio 'cast and instant chat session, Craig.

Blogger

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 had a quick look online for a Siemens ROI calculator and didn't see one. Is there an excel version that we can get?

 

Craig: please try this link

 

https://www.industry.siemens.com/topics/global/en/energy-efficient-production/Pages/Default.aspx?HTTPS=REDIR

Hello and thanks for everyone who attended.

I will start answering now

What are the drive duty transformer requirements associated with these drives you are discussing?

 

Craig:  With an Active Front End drive the "K" factor of the transformer is less of an issue due to lower harmonics

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. 

Hello and thanks for everyone who attended.

I will start answering now

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.

Are high efficiency VFD's more likely to cause bearing failure,  -what, if any, measures have you taken to prevent this?

Craig: Common mode currents can be caused by acouple factors but there are no additional factors in efficient VFD's over standard

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.

What is a good VFD specification for 40 HP VFD requirements and up?

 

Craig:  Not clear what type of specification you are looking for.  There are IEEE specifications for topics like harmonics or motor efficiency

Are high efficiency VFD's more likely to cause bearing failure,  -what, if any, measures have you taken to prevent this?

Craig: Common mode currents can be caused by acouple factors but there are no additional factors in efficient VFD's over standard

Hello and thanks for everyone who attended.

I will start answering now

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.

What is a good VFD specification for 40 HP VFD requirements and up?

 

Craig:  Not clear what type of specification you are looking for.  There are IEEE specifications for topics like harmonics or motor efficiency

Hello and thanks for everyone who attended.

I will start answering now

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.

Can you point me to some user groups where I can learn more about energy efficient motors?

Iron

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).

Iron

Are high efficiency VFD's more likely to cause bearing failure,  -what, if any, measures have you taken to prevent this?

Craig: Common mode currents can be caused by acouple factors but there are no additional factors in efficient VFD's over standard

I had a quick look online for a Siemens ROI calculator and didn't see one. Is there an excel version that we can get?

 

Craig: please try this link

 

https://www.industry.siemens.com/topics/global/en/energy-efficient-production/Pages/Default.aspx?HTTPS=REDIR

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.

Do newer drives have a longer life expectancy?     what's the payback -how long untill ROI = upfront cost?

Iron

I had a quick look online for a Siemens ROI calculator and didn't see one. Is there an excel version that we can get?

 

Craig: please try this link

 

https://www.industry.siemens.com/topics/global/en/energy-efficient-production/Pages/Default.aspx?HTTPS=REDIR

What is a good VFD specification for 40 HP VFD requirements and up?

 

Craig:  Not clear what type of specification you are looking for.  There are IEEE specifications for topics like harmonics or motor efficiency

Hello and thanks for everyone who attended.

I will start answering now

What is a good VFD specification for 40 HP VFD requirements and up?

 

Craig:  Not clear what type of specification you are looking for.  There are IEEE specifications for topics like harmonics or motor efficiency

Are high efficiency VFD's more likely to cause bearing failure,  -what, if any, measures have you taken to prevent this?

Craig: Common mode currents can be caused by acouple factors but there are no additional factors in efficient VFD's over standard

I had a quick look online for a Siemens ROI calculator and didn't see one. Is there an excel version that we can get?

 

Craig: please try this link

 

https://www.industry.siemens.com/topics/global/en/energy-efficient-production/Pages/Default.aspx?HTTPS=REDIR

Hello and thanks for everyone who attended.

I will start answering now

I had a quick look online for a Siemens ROI calculator and didn't see one. Is there an excel version that we can get?

Iron

I had a quick look online for a Siemens ROI calculator and didn't see one. Is there an excel version that we can get?

 

Craig: please try this link

 

https://www.industry.siemens.com/topics/global/en/energy-efficient-production/Pages/Default.aspx?HTTPS=REDIR

Hello and thanks for everyone who attended.

I will start answering now

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.

Iron

Are high efficiency VFD's more likely to cause bearing failure,  -what, if any, measures have you taken to prevent this?

Craig: Common mode currents can be caused by acouple factors but there are no additional factors in efficient VFD's over standard

can you see the questions already posted?

Iron

Hello and thanks for everyone who attended.

I will start answering now

Hello and thanks for everyone who attended.

I will start answering now

Are high efficiency VFD's more likely to cause bearing failure,  -what, if any, measures have you taken to prevent this?

Iron

I had a quick look online for a Siemens ROI calculator and didn't see one. Is there an excel version that we can get?

 

Iron

What is a good VFD specification for 40 HP VFD requirements and up

Iron

Craig (Drives Coach) is now available to answer your questions here

Blogger

What is a good VFD specification for 40 HP VFD requirements and up

 

Iron

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.

Iron

Do newer drives have a longer life expectancy?     what's the payback -how long untill ROI = upfront cost?

Iron

What are the drive duty transformer requirements associated with these drives you are discussing?

 

Iron

Can Craig talk more specifically about regen drives?  What's the mechanism for capturing the data on savings, typically?  What are his customers using?  

Iron

What type of VFD maintenance is required?

 

Iron

What is the downside to going with the energy efficient motors and drives and new technologies? Is the technology more expensive?

Blogger

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.

Iron

type in your questions for Craig?

Blogger

What applications are best served by having a regenerative drive?

 

Blogger

D-Read: 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

Blogger

chp2 and arjun, if you were able to post, you're already logged in. The streaming audio player will pop up on this page at 2pm eastern

 

Blogger

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.

Blogger

Can Craig address this issue in terms of conventional shafted vs. servo motors?  

Iron

yes chat and audio will be archived

 

Blogger

I can't hear anything and no audio panel?

Iron

Will the live chat be archived as well?

Iron

yes there should be an audio panel. no visuals or PPTs

Blogger

Should I see an audio control panel?

Iron

Is there visual of the presentation?

 

Iron

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.

Blogger

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.

Blogger

chp2 and arjun, if you were able to post, you're already logged in. The streaming audio player will pop up on this page at 2pm eastern

 

Blogger

why can't I hear anything?

Iron

Has rhis session started?

 

Iron

Is this a 2-way audio connection?

Hello, this is Bismark Espinoza.

Iron

Hello, this is Doug Read 

Iron

Steve, the player will pop up in 4 min. no audio check available prior. just make sure your PC audio is on.

Blogger

Hello this is Craig Nelson

Is there a test sound you could generate for audio check?

Craig's all set and clearing his radio guy pipes now!  

 

Iron

Alex, afterwards, if you can let me know how many registrants we got, I'd appreciate it.   Thanks...Tim

Iron

chp2 and arjun, if you were able to post, you're already logged in. The streaming audio player will pop up on this page at 2pm eastern

 

Blogger

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.

Blogger

Same question. What is the process to attend ?

 

Iron

How can i enter this Webinar?

Iron


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