WEG CFW300 VFD Dynamic Braking from AutomationDirect
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- Опубликовано: 25 окт 2024
- www.automation... - (VID-DR-0088)
Learn what Dynamic Braking is and how to use it with the WEG CFW300 Variable Frequency Drive in this brief hands-on tutorial video using the Free WPS software. This is the best VFD, with a super low cost, but with high end features like Dynamic Braking, Fire Mode, PID, 65,000A SCCR, Zero Stack foot print, Multi-Speed, etc and is even cULus listed!
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**Prices were valid at the time the video was released and are subject to change.
Related AutomationDirect.com part numbers: CFW300A01P6S1NB20, CFW300A02P6S1NB20, CFW300A04P2S1NB20, CFW300A06P0S1NB20, CFW300A01P6S2NB20, CFW300A02P6S2NB20, CFW300A04P2S2NB20, CFW300A06P0S2NB20, CFW300A07P3S2NB20, CFW300A01P6T2NB20, CFW300A02P6T2NB20, CFW300A04P2T2NB20, CFW300A06P0T2NB20, CFW300A07P3T2NB20, CFW300B10P0B2DB20, CFW300B15P2T2DB20, CFW300-CRS232, CFW300-CRS485, CFW300-CUSB, CFW300-KHMIR, CFW100-CFW300-MMF, CFW300-IODR, CFW300-IOAR, CFW300-IOADR, CFW300-IOAENC, CFW300-KFA-S1-S2, CFW300-KFB-S2, CFW-WPS, CFW300-FAN-A, CFW300-FAN-B, CFW100A01P6S120G2, CFW100B02P6S120G2, CFW100A01P6S220G2, CFW100B02P6S220G2, CFW100C04P2S220G2
You're making one of the best videos on VFD working, with very clear explanation. Thank you.
Thanks! Please share with your friends and co-workers! FYI: There are a lot more just like it at www.automationdirect.com/videos.
This was the video I subscribed for. Thank you Thank you Thank you Thank you!!!!!!! I'm using the B frame 3HP model and the same brake for a CNC spindle; this helps a TON.
Thanks, we are glad that it helped you figure out your project. you can find even more WEG videos here: www.automationdirect.com/videos/home?t=link&cat1=113&cat2=129
thanks for sharing
You are welcome! Did you know we have over 1000 automation tutorial videos here? www.automationdirect.com/videos.
Great can you show me in video how to wiring the VFD 2,2 kw at :
+ fuse
+ safety relay
+ filter
+ braking resistor
+ contactor
+ e-stop
+ reset button
+ switch main power
Ho Papi,
Each of those subjects is covered in a separate video. You can find all of the WEG VFD videos here:
www.automationdirect.com/videos then click on the DRIVES category on the left column, then click on WEG.
They are also located at www.automationdirect.com/cookbook
I love these videos, thank you so much!
Does Automation direct still carry the external braking resistors for CFW300A04P2S1NB20, The smaller A frame?
Thanks for the feedback! Yes, AutomationDirect does sell braking resistors, BUT beware that the A Frame drives don't have Dynamic Braking built in (see 4:00 in the video). So if you need dynamic braking with the A Frame drives you will also need an external Dynamic Braking Unit (DBU). Automation Direct sells those too, of course ... www.automationdirect.com/adc/search/search?fctype=adc.falcon.search.SearchFormCtrl&cmd=Search&searchquery=dynamic+braking+unit&categoryId=0&TxnNumber=-1&searchqty=10
dose we need a breaking resistor when we switch off the motor and drive. braking resistors are used when we have to decelerate the motor right ???
Correct - Braking Resistor will help when you try to decelerate the motor faster than it would spin down by itself. The Braking resistor is needed to absorb the excess energy created by decelerating the motor. Whether you need a braking resistor depends on how fast your are trying to decelerate and the size of the load. The drive can handle some of it by itself.
If you decelerate and get an overvoltage fault, then yes, you probably need a braking resistor.
This is the best video i have been seen. So if i have vfd and i want to add DR but i want to calculte the resistor required for the drive, how to calculate that? If the deceleration time 5 sec and the drive power 11 kw, 400 volt?
Another question, the power supply is not some times stable, some times 380 some time 370, so the dc bus is not stable and the that changes overoltage threshold and maybe exceeding resistor power, is not right?
Resistor size:
----------------------
If you need to sink 11KW of power at 400V then you need to sink 11,000/400 = 27A of current. And we know I^2 x R = 11K -> so
R = 11K/I^2 = 15ohm 11KW resistor in a ideal world at 100% duty cycle.
You said your decel time was 5 sec, but didn't tell us the duty cycle. You will need that to derate the resistor size.
See 04:18 in the video for more on this.
Here is another video that discusses Dynamic Braking: ruclips.net/video/87EwaBzd7Dk/видео.html
Unstable Supply
------------------------
You are correct, so plan based on the worst case line voltage.
The over voltage videos covers this.
More Videos
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Did you know that we have over 1200 Automation Tutorial Videos? Check them out here:
www.automationDirect.com/videos (random search or by category menu on left)
wwwautomationdirect.com/cookbook (by subject - there is a whole chapter on VFDs)
@@automationdirect Thank you so much for helping.
I have the drive that i told you, 11kw and from the catalog i found the brake resustor required and that was 60 ohm but the installed on the drive about 65 ohm /1500 w, but that one burned so i wanted to buy new one but i found 70 ohm, my question is if i use a higher ohm resistor than the rated in catalog and higher power it will be good or bad to the drive? I mean if the catalog says 60 ohm and power resistor i use more than 1500 watts for example 3000 watts. And 80 or 70 ohm. Is it right?
If i use duty cycle 20 %. Do you mean duty cycle 20 % as example the the time resistor will be on and off? Means in 20 % the resistor will be on and off at 80 %?
@@wadib3eed7 Right, if you only use the resistor 20% of the time you can reduce the wattage accordingly. Note that the braking resistors in the manual assume a 10% braking duty cycle (you are only braking 10% of the time) which is very typical for these kinds of things.
@@automationdirect so, as the exampke 11kw drive neans 11kw resistor at 100% duty cycle but at 10% duty cylce it will be 1.1kw power of the resistor, right?
Hallo,
I have a cheap chinese Vfd with DB built in. Now i bought an Brake resistor, to stop my motor more quickly, but i cant activate the DB. I changed every parameter i found but nothing works… can you tell me wich parameters you changed to get the DB activated?
Hi Luk, The video shows you the parameter we used at time 2:41. It was parameter 153. But that is for this drive. Look for something similar in your drive.
Dynamic braking no need resistor brake, it put DC voltage into stato in order to make a braking Force
DC Braking is intended to hold things like fans still once the motor is stopped and should not be used to actually stop the motor.
Braking resistor is used to stop a motor with a lot of inertia quickly without overvoltage errors.
@@automationdirect If we need to stop motor with a lot of inertia immediately, can stopping with the Braking resistor do?
@@ttautomation7088 Yes, Braking Resistor will make a HUGE difference, as you can see in the examples in this video.
great
Glad ou liked it. We have a LOT more like it at:
www.automationdirect.com/videos ............ Random Search/Topic
www.automationdirect.com/Cookbook ...... Bu Subject