What is the Difference between VFD and Soft Starter?
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In this video, we will look at the internal workings of the devices, how to determine which device you might want, and look at some applications to better understand these differences.
Let’s first talk about the internal working of the two devices. A typical three-phase soft starter uses six Thyristors or Silicon Controlled Rectifiers, oriented in an anti-parallel configuration to start the electric motors smoothly.
A Thyristor is made up of 3 parts; a logic gate, a Cathode, and Anode. When an internal pulse is applied to the gate it allows current to flow from Anode to Cathode which then sends current out to our motor.
When the internal pulses do not apply to the gate, the SCRs are in the OFF state and therefore they restrict the current to the motor.
These internal pulses limit the applied voltage to the motor slowing down inrush current. The pulses are sent based on ramp time so the current will be slowly applied to the motor.
The motor, attached to the soft starter, will start up at a nice smooth current and top out at the preset maximum speed.
The motor will stay at that speed until we stop the motor where the soft starter will ramp down the motor in a very similar way as the ramp up.
VFD’s have three main components, a Rectifier, a Filter and an Inverter.
The Rectifier acts like Diodes, takes the incoming AC voltage and changes it to DC voltage.
Next, the Filter uses Capacitors to clean the DC voltage making it a smoother incoming power.
Finally, the “Inverter” uses transistors to convert the DC voltage and sends the motor a frequency in Hertz.
This frequency drives the motor to a specific RPM. We can set the ramp up and down times just like in a soft starter.
So how do we know which device is needed for our application? The decision on which device you choose comes down to how much control your application requires.
If your application requires a large inrush of current but does not require speed control, then a soft starter is the best option.
If speed control is required, then a VFD is a must.
Also, the price can be a determining factor in a lot of real-world applications. Since a soft starter has fewer control features, the price is lower than a VFD.
And finally, if the size of our device is a determining factor, soft starters are generally smaller than most of the VFDs.
Let’s look at some real-world applications to help us see the difference between a VFD and a Soft Starter.
The application we will look at is a cooling fan. In this scenario, a cooling fan will turn on when the plant air temperature hits a high-temperature set-point.
Once the set-point is reached the cooling fan will slow down to maintain the air temperature unless it drops below a low-temperature setpoint, where it will shut off.
However, if the temperature continues to rise and pass the high-temperature setpoint, the fan will need to move faster.
Which device would work best in this situation? That’s right! A VFD would be better than a soft starter because the speed of the fan will need to vary.
If our scenario was only turning the fan on or off based on temperature and not changing speed, then a soft starter would be a better option.
In closing, a VFD and a Soft Starter can do similar functions when it comes to ramp up or down a motor.
The main difference between the two is a VFD that can vary the speed of a motor while a soft starter only controls the starting and stopping of that motor.
When faced with an application, price and size are in the favor of a soft starter.
A VFD is the better choice if speed control is required. The good news is that if an existing application has a soft starter in place and speed control is later determined to be a requirement, a VFD can easily replace a soft starter. The opposite is true as well, a soft starter can replace a VFD.
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@juanzingarello4005 3 жыл бұрын
One important thing to note here. When adding a VFD, in many times the motor will need to be replaced as well. The motor needs to be Inverter Duty rated to operate with a VFD. If you use a non-inverter duty motor it won't cause immediate damage but it will in the long run lessen the life of the motor quicker due to the harmonics which can damage the motor windings. I see it all the time in HVAC applications where they replace Vortex dampers by adding a VFD to control fan speed to duct static pressure and motors burning out after only a year or two. Ideally, if you replace an HOA or Soft Starter with VFD, make sure the motor is Inverter Duty and if not, the motor should be replaced as well.
@realpars 3 жыл бұрын
Thanks for sharing your knowledge with us, Juan. We appreciate that!
@Dan-ger82 2 жыл бұрын
Yep I told guy that they needed inverter rated motor instead of general duty motor for evaporator fan motor that burnt out after about two years from being run on VFD. He didn't believe me because said the engineer wouldn't have designed it if it didn't work. Next motor only lasted about same amount of time. Some people think if you're not a licensed engineer you don't know anything. Oh well because I've seen lots of things engineers designed that could of used the advice of a technician that's worked in real world for awhile.
@brylozketrzyn Жыл бұрын
Before you actually destroy the winding, bearings will be destroyed due to bearing currents. It may however not occur in water pump applications
@moments8333 11 ай бұрын
Fact 💯,case harmonic filter's maybe prevent this issue?
@Niphiz 7 ай бұрын
How can you tell if a motor is inverter duty rated?😅 I had a water pump with a 1,5kw 3 phase motor and connected it to a vfd, it will be running at about 15hz constantly as it’s for aquarium use. The nameplate doesn’t reference anything specific 😢
@nikhilhegde7878 5 жыл бұрын
As an engineer who has worked on industrial drives for various applications , this is the only channel which explains these concepts very effectively. Keep sharing these knowledge and also would love if you could share the logic in which parameters are set in the control board.
@realpars 5 жыл бұрын
That's a great compliment, Nikhil! Thanks a lot!
@user-gm3rc2wo4s 4 жыл бұрын
Can you tell me in chinese what is that ? thank you very much.
@zenebehagos3537 4 жыл бұрын
that is a great deal of knowledge, hence thank so much for your sharing this
@JR-db3qi 3 жыл бұрын
Keep at it young man, you will never know it all (70 y/o still learning) look at syn RN motors on ABB website. Tessler was a clever bugger! Good luck friend 👌
@hamzatroy3595 2 жыл бұрын
Instablaster.
@vasanpk3404 2 жыл бұрын
As a Technician this is a valuable information for me, explained in very simple way, subscribed the channel.
@realpars 2 жыл бұрын
Awesome, thank you!
@micahbuchheit1283 2 жыл бұрын
I'm enrolled online for Automation, Robotics, and PLC and I have to say this is by far easier to understand. Thank you.
@realpars 2 жыл бұрын
Happy to hear that, Micah! Thanks for your support!
@deadspeedv 4 жыл бұрын
VFD's are also great for power savings if you have long piping systems with low head pressure required, thus saving on friction losses with higher fluid velocities. One of my primary jobs for awhile was analyzing pumping systems to determine the feasibility of retrofitting VFD's using power savings to build a business case. Saved millions at a water utility company for both water and waste water systems
@shearzy3152 3 жыл бұрын
No studies required if we are talking about replacing any contactor/soft start with a VFD. The flexibility of a VFD is unparalleled and absolutely required for any control over a system. It can certainly improve power requirements in the long term but be sure to include a line reactor before the VFD it this is going to be heavily deployed. Harmonics can hurt a plants power factor immensely. A soft start is on and off, I would rarely recommend, only if that is its sole purpose.
@jannarkhan9141 Жыл бұрын
offcorse
@deadspeedv Жыл бұрын
@@shearzy3152 Not necessarily. VFDs also have a much higher power loss. Also because I live in Australia they have a reduced lifespan due to high heat in summer when not airconditioned (though this was in 2012 so tech has probably improved on both fronts). Some waste water piping systems with short runs, high head don't have much energy saving through reducing fluid velocities. Sometimes a pump's performance curve is perfectly ideal for a particularly system with a soft starter so installing a VFD actually cost more in energy due to power losses. I did this work between 2008-2014 and I do data science now rather than electrical engineering so haven't actually seen VFDs for 8 years. Schneider was my prefered
@wecx2375 9 ай бұрын
@@deadspeedvthis right here. I am a Rotating Equipment Specialist for Oil/Gas. Mostly pumps. If the pump curve is ideal for the system then you can just run it, otherwise yeah VFD.
@Metroid1890 4 жыл бұрын
These videos are really amazing, I'm a mechatronics student and a hobbyist and always try to rescale the instruments seen on the industrial area to a more home-friendly or toys applications, by watching how the industry works I can also learn to adapt my prototypes in a robust and straight-foward way. Thanks!!
@realpars 4 жыл бұрын
Hi Jonathan, Thanks a lot for your kind compliment! We are always extremely happy to hear such positive feedback! If you ever have any questions, feel free to reach out to us. Happy learning!
@MyKarur 4 жыл бұрын
Excellent presentation. In addition, use of a VFD for a conveyor drive helps because we need max torque and low speed
@realpars 4 жыл бұрын
Thanks a lot for your support, Sid!
@sannmaung3673 4 жыл бұрын
Thanks for showing video and your explainations.
@awaiskazmi2262 4 жыл бұрын
The way realpars presents videos is really commendable.
@realpars 4 жыл бұрын
Thanks for your support, Awais!
@oznol1 4 жыл бұрын
Awesome video! I will just comment on one point to clarify. @1:03 - "A soft starter is generally used in applications where there is a large inrush of current that could damage a motor" The arrow appears to come from the electrical grid into the motor. It is the motor that creates this inrush (drawing on the grid) and as a result can have adverse affect on the electrical grid and other equipment (like a voltage drop dimming the lights). Soft starters are used to protect the integrity / strength of the grid voltage, avoiding dips during motor starting. Soft starters are horrible for motors if starting under any loaded conditions, this is because the torque generated by the motor when operated on a soft start is a squared function of the voltage drop. 50% drop in voltage to start the motor means 25% available rated torque! A 'no load' or 'reduced load' condition would be okay but needs to be reviewed. Both VFD and Soft Starts can be used to protect the grid strength, just a difference in how they do it. Thanks for the video!
@realpars 4 жыл бұрын
Thank you for your comments. It is the motor demand that causes the inrush of current when the motor starts, unless a VFD or soft starter is used to limit the inrush current. When designing a motor control system (starter type, motor type and size, motor protection, etc.), the entire installation environment must be analyzed. How much load on start? Load on stop? Torque requirements? Horsepower requirements? Is speed regulation required? Answering these questions and applying the correct devices will provide for long motor life.
@michaelslee4336 3 жыл бұрын
We use soft starters to start pumps slowly to protect PCV piping from breaking.
@DelbertQuentin 5 жыл бұрын
Back in the day, a soft start was used to reduce the current inrush to the motor for about a few seconds. They are still out there , especially for large direct drive compressors in the refrigeration and HVAC applications. Great video!, but I'm an old coot that rembers those days.
@realpars 5 жыл бұрын
Thanks for your comment, Dale! Great to hear your thoughts and knowledge on this topic!
@erickamarianaescobedobarro1742 4 жыл бұрын
I'm recent graduate from the control and automation engineering. However I need to learn more and more tasks and your videos are helping me lots of. Thanks for your collaboration. I'm from México City so, at the same time that I reforce my knowledges, I practice the English language.
@realpars 4 жыл бұрын
That is amazing to hear, Ericka! Thanks for sharing your positive feedback with us! You are doing a great job! Keep up the learning curve. Let us know if you ever have any questions along the way! Just to let you know, that we also have a free course on PLC Hardware bit.ly/2XnnUrF Happy learning!
@jsnyara Жыл бұрын
Keep in mind, depending on brand, some soft starters can only start a motor 2 times in an hour. Also, they reduce motor voltage on startup which causes them to draw VERY high amperage through the soft starter.
@ngtrki 11 ай бұрын
Your videos are totally helpful. I'm a last year student majoring in Control Engineering & Automation. Your channel helped me understand a alot about industrial devices, programing, communication protocols,... Moreover, your channel is one of the best channels for me to learn English. Huge thanks for this channel and the creative team! Hopefully, there will be more better videos in the future
@realpars 11 ай бұрын
Thank you so much! We truly appreciate your support!
@WXUZT 4 жыл бұрын
Thank You For such a nice Explanation ! Never imagined so much Technology involved in Startup. We take it for granted ! Just a flick of the switch I used to think. Changed my perspective.
@robbymashegorobby9310 5 жыл бұрын
we are getting skilled with the knowledge you giving us. thank you.
@realpars 5 жыл бұрын
Amazing compliment, Robby! Thank you!
@Kenneth-uu8xs Жыл бұрын
Did contactord ever amplifier
@assioshungwe4013 4 жыл бұрын
still an electrical trainee these are videos for my training keep it up
@realpars 4 жыл бұрын
Happy to hear that, Assios!
@Thoai47 2 жыл бұрын
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@yassershubber6193 3 жыл бұрын
BEST EXPLANATION FOR VFD AND SOFT STARTERS, HANDS DOWN, THANK YOU,
@realpars 3 жыл бұрын
Thanks for the feedback and suggesiton, Yasser!
@anuraagannu3493 4 жыл бұрын
Thanks for getting it with so much of clarity
@realpars 4 жыл бұрын
You are very welcome, Anuraag! Happy to hear that you enjoying our course videos!
@Bramon83 2 жыл бұрын
Great simple explanation. I use VFDs with a pressure sensor on vacuum systems at tunnel car washes. As more people use the hoses the system ramps up. Saves money for the owners and wear and tear on the producer and motor.
@realpars 2 жыл бұрын
Thanks for your support!
@mdjamalahmef8773 2 жыл бұрын
হাগগগ
@montagray3761 4 жыл бұрын
Great video! Clear , concise and at a good level.
@realpars 4 жыл бұрын
Thanks for your support, Montag!
@bilalmemon04 5 жыл бұрын
Thanks for all of your educative videos! Please make some videos on AC ratings of motors and what is meant by SIL rating of PLCs. Thanks again!
@realpars 5 жыл бұрын
Thanks for the topic suggestion, Bilal. I will definitely go ahead and forward this to our creator team. Happy learning!
@rkhrrrmdc3843 3 жыл бұрын
Simple and very clear explanation. Thank you 😊.
@realpars 3 жыл бұрын
Glad it was helpful!
@zuhairalsaffar7001 4 жыл бұрын
Sir you're excellent teacher thanks
@sasikumarvaranasisravankum8163 4 жыл бұрын
Simple & Easy way of Explanation. Thanks
@realpars 4 жыл бұрын
Great to hear that! Happy learning.
@sherifsaad5388 4 жыл бұрын
Thank you for this clear & simple explanation😍
@realpars 4 жыл бұрын
You are very welcome, Sherif! Happy to hear that you are enjoying our content!
@ahmedmetwally4911 5 жыл бұрын
Wow , wow , wow great effort , thank you very much realpars team for these high quality videos :) Ahmed from egypt
@realpars 5 жыл бұрын
You are very welcome, Ahmed!
@robertisoe9879 4 жыл бұрын
Very informative. Process Control engineer from Kenya. Keep up!
@realpars 4 жыл бұрын
Great! Thanks for your support, Robert!
@AmplifierWorld 4 жыл бұрын
I am from India and I really impressed with your explanation style very easy to understand
@realpars 4 жыл бұрын
Great to hear that, Shailendra! Thanks for your support. Happy learning, please let us know if you have any questions along the way!
@canaldamanutencao4446 3 жыл бұрын
Very cool. Very well explained, I would like to congratulate you for the initiative.
@realpars 3 жыл бұрын
Thank you very much!
@wiseowldisplays5306 3 жыл бұрын
VFD also have the added advantage of being able to converting single phase to 3 phase.
@santhoshrodrigues2791 3 жыл бұрын
Is it possible in Siemens vfd pm240 series. Please guide me
@ravisaroj28 3 жыл бұрын
yes it is possible, we are also converting single phase DC to three phase AC.
@rakesh78070 3 жыл бұрын
@@ravisaroj28 single phase DC ?
@danburns7288 3 жыл бұрын
only up to about 3HP
@danburns7288 3 жыл бұрын
after 3hp you will need three phase input power
@yehtutnaung7164 5 жыл бұрын
Nice video explains about soft starter and VFD. Thank you for your clear explanation
@realpars 5 жыл бұрын
Great to hear! You are very welcome.
@sahayarajthobias6137 4 жыл бұрын
Thanks giving is deserved to you in abundance sir.Because you prove "and motivate meeks and weaks into professionalsprofessionally that "Knowledge is to serve
@realpars 4 жыл бұрын
Great to hear that, Thobias! Thanks for sharing!
@mtrajarajan 3 жыл бұрын
Clearly explained the difference between VFD & SS and its usage.. Thanks
@realpars 3 жыл бұрын
You're more than welcome!
@jairoalcidesvillamarin8665 5 жыл бұрын
Good morning , desde Colombia gracias
@mohammedhafeezuddin5442 3 жыл бұрын
Simplest way of explaining the difference between VFD and Soft Starter. Subscribed your channel
@realpars 3 жыл бұрын
Thanks a million, Mohammed! Great to hear that.
@jayaselanjaya2615 Жыл бұрын
so clear explanation and easy to understand
@realpars Жыл бұрын
Glad it was helpful!
@IngDzib 4 жыл бұрын
Thank you so much, It´s your lessons are incredible
@realpars 4 жыл бұрын
You are very welcome, Wilberth!
@ibrahimal_menesy4l 4 жыл бұрын
thanks for this video, you just closed safely an argument between me and my manager on some simple application which i decided it'd need only a soft starter but he said it needs a VFD with MC 😁😁😁, i win only by your video, thank you.
@realpars 4 жыл бұрын
Thats amazing, Ibrahim! What a great compliment. Thanks for sharing that with us! Happy learning!
@galyien 4 жыл бұрын
Some just prefer VFD on everything. Meh... I see a lot of our pumps, conveyors, separators going to VFD's. Yep believe it or not we still have some Alpha Laval separators still on wye/delta starters :)
@ibrahimal_menesy4l 3 жыл бұрын
@@galyien I'm one of those who like to cut expenses, most of motor driven applications just need start/ stop ramps, overload protection, and that's existing by default in soft starters which are way cheaper than VFD's
@wonderingvideo7541 5 жыл бұрын
Great video thank you for sharing knowledge with us. Good continuation for next.
@realpars 5 жыл бұрын
You are very welcome, Abderrahmane! Happy learning!
@Garikina5 9 ай бұрын
Thank you for your efforts ☺️... I learnt about soft starters and INVERTER DUTY rated motor....
@realpars 8 ай бұрын
You're very welcome! Happy learning
@AhmedAtef-lj4rq 4 жыл бұрын
Excellent illustration, thank you
@realpars 4 жыл бұрын
Great to hear that! Thanks for sharing, Ahmed!
@dave19769 Жыл бұрын
Very clear explanation, thank u for sharing.
@realpars Жыл бұрын
Glad it was helpful! Happy learning, Dave
@MehediHasan-hj1io Жыл бұрын
This video is very effective and most useful for an engineer.. Thank you very much sir.
@realpars Жыл бұрын
Glad it was helpful!
@ayman9422 3 жыл бұрын
I follow your chanel from egypt 🇪🇬 👍🏻
@waseemlucky7331 5 жыл бұрын
Amazing job .... this is my first time to watch your any video and now i am one of your subscriber and wanted to learn more from you ..... Thank you so much for providing us such knowledgeable videos .... Love you man
@realpars 5 жыл бұрын
That's amazing, Waseem! We are happy to have you join the RealPars family! If you have any questions, feel free to reach out to us whenever needed! Happy learning!
@waseemlucky7331 5 жыл бұрын
@@realpars Thank you so much Sir for your kind and humble response and Sir i feel like home here if there is any question in my mind i would ask you with out any hesitation ....... Thank you so much once again ...... and also i will make sure that i give awareness to others about your channel ..... hope so i can helped others by your knowledged ...... Thank you Sir ..... Have a grest day and do stay safe .....
@realpars 5 жыл бұрын
Thank you very much for your support! You are the best! :)
@waseemlucky7331 5 жыл бұрын
@@realpars Sir you deserve this all ... whatever i said above .....
@glaucioferreira13 3 жыл бұрын
Great video! Clear and concise !!
@realpars 3 жыл бұрын
Glad it was helpful! Thanks for sharing, Glaucio
@bstar2033 4 жыл бұрын
Very informative and proper presentation. Thank you.
@realpars 4 жыл бұрын
Thanks a lot for your kind comment! Happy to hear that.
@bstar2033 4 жыл бұрын
RealPars I'm just asking, is there any video (s) on how automatic transfer switches works/operates?
@sushilgharat2264 Жыл бұрын
The way of explaining is awesome...🤟
@realpars Жыл бұрын
Thank you so much!
@user-tf6yu9wu8r Жыл бұрын
That's good explanation for understanding VFD and softstarter , especilly to beganner likeme. Thanks
@realpars Жыл бұрын
Glad it was helpful!
@InstrumentCalibration Жыл бұрын
Great Video for initiators in the field
@realpars Жыл бұрын
Glad it was helpful!
@lordjimdorato9801 5 жыл бұрын
Great video....easy to understand. Good job.
@realpars 5 жыл бұрын
Thanks for your support, Jim!
@lordjimdorato9801 5 жыл бұрын
I'm working for almost 24 years as an electrical maintenance supervisor in a manufacturing plant thats why I appreciate your video for teaching the young engineers how this stuff works.
@pranavdambalkar5365 9 ай бұрын
This channel is GOLD
@realpars 9 ай бұрын
Thank you very much!
@sandeepnchouhan6113 4 жыл бұрын
Really very informative and nice elaboration ….Thank you sir.
@realpars 4 жыл бұрын
You are very welcome, Sandeep! Great to hear that.
@WireWeHere 5 жыл бұрын
Your fan animation will be subject to induced vibrations at higher speeds due to blade geometry. Suggest a VFD and through the versatile settings limit maximum RPM to a value below the tested unstable zone or find a fan supply source with a design department consuming far less Red Bull.
@thatguyalex2835 Жыл бұрын
Haha... Yeah. The fan blades don't look too optimized, carbonated energy drink was a factor. :) In all seriousness, the animation was pretty well done. Helped me understand the difference between VFD and soft start.
@jesusduran44 Жыл бұрын
Thank you very much... Excellent explanation...
@realpars Жыл бұрын
Glad it was helpful!
@cordaxg6261 7 ай бұрын
Im now further in to my Automation education. These movies i have been watching for some weeks. Let me tell you ! Very formal and very easy to follow. English isnt my main language, but listening to the very calm and easy to hear voice, and looking at the pictures and examples REALLY makes this a whole lot easier to grasp and even learn than any of my teachers ^^. This is very good if you are just starting up with Automation. Kudos ! Greeting from Sweden :)
@realpars 7 ай бұрын
That's amazing to hear! Thank you so much for sharing such positive feedback. If you have any questions along the way, please do not hesitate to contact us at any time - we're happy to help!
@cordaxg6261 7 ай бұрын
@@realpars thank you for you response ! And thank you again :) i will make sure to remember that !
@djblackarrow 4 жыл бұрын
I like the IGBT's in the VFDs. When i found defective VFDs that are thrown away i like to remove these IGBTs and use them for my own projects.
@user-eg1zw3ky4s 2 жыл бұрын
Thank you very much . You are really helping me
@realpars 2 жыл бұрын
It's our pleasure! Happy learning
@technology23 2 жыл бұрын
Very good explanation thank you so much
@realpars 2 жыл бұрын
Glad it was helpful!
@dharshanahewawasam361 5 ай бұрын
Thank you very clear explanation.
@realpars 5 ай бұрын
Glad it was helpful! You're very welcome
@edgardsmithmarinotabraj2499 3 жыл бұрын
Excelente explicación. Muy claro
@realpars 3 жыл бұрын
Muchas gracias, Edgard!
@nareshdadi1441 4 жыл бұрын
Excellent presentation.. Thank you..
@realpars 4 жыл бұрын
Thanks for your support, Naresh!
@duanecarroll4375 2 жыл бұрын
A VFD handles fluctuating demands and a soft start handles continuous demands
@hanyramadan6212 4 жыл бұрын
Great video thank you for sharing knowledge with us
@realpars 4 жыл бұрын
You are very welcome, Hany! Happy learning!
@archanaarul4476 3 жыл бұрын
Crystal clear explanation.👏👏
@realpars 3 жыл бұрын
Glad it was helpful!
@danielbartolome8807 2 жыл бұрын
Great explanation thanks for this video
@realpars 2 жыл бұрын
Thanks for watching!
@ma9131 3 жыл бұрын
Softstarter will draw current between 300% to 500% at the startup, so whether the source supply can handle or no, that should also be considered. In this context VFD has the advantage
@shearzy3152 3 жыл бұрын
VFD always has the advantage, a properly sized VFD can handle the inrush and has speed, ramp up, ramp down control. Among hundreds of other parameters. Softstarts are only used when the load is running consistently with minimal occurrences of on/off state. From a controls perspective, VFDs are king, especially with EIP control nowadays.
@nolezosa8912 3 жыл бұрын
Very informative. Thank you for sharing.
@realpars 3 жыл бұрын
Glad to hear that, you're more than welcome!
@ndeye4599 3 жыл бұрын
Thank you very much for explanations
@realpars 3 жыл бұрын
Our pleasure!
@geoffhalstead1811 4 жыл бұрын
My lathe, two milling machines, shaper and drilling machine are controlled by VFDs, only the lathe having a dedicated unit, the other 4 machines sharing two VFDs with each having a three position 3-phase selector changeover switch to direct power to a single machine of choice, power switched off of course. What a pleasure being able to select the correct speed depending on circumstances and what type of metal used and rate of removal. The hassle of stepped pulleys and belt changing a thing of the past. The drilling machine and lathe are now an absolute pleasure to use as speed is now instantly controlled to suit depth of cut with metal being used.
@emmanuelsanusi1389 5 жыл бұрын
Thanks to RealPars !!!
@realpars 5 жыл бұрын
You are very welcome!
@adnozinabie3495 Жыл бұрын
Thanks brow I am obtain some hint about soft starter and VFD.keep it up.
@realpars Жыл бұрын
You are most welcome!
@mohamedabdulla6483 5 жыл бұрын
What a great video Can you please update a video for parameters of both VFD and Softstarter. What are all the most important parameter setup to be known?? How to setup speed reference and speed control ? Etc
@realpars 5 жыл бұрын
Thanks for the topic suggestion, Mohamed! I have forwarded this to our creator team. Thanks!
@hloniphanicavenmanganyi6255 5 жыл бұрын
1. FLC of your motor 2. Supply voltage eg. 400V
@stevenlee5755 5 жыл бұрын
Maybe you have interest in our products. topstock.aliexpress.com
@smiley235 4 жыл бұрын
Just get the manual of the Vfd and it will have all the info. Typically a vfd you set motor parameters (Volts, current, power, poles, rpm, min and max frequency). Then wire switches to connect a common terminal to digital inputs. Program digital inputs to do what you want with motor (fixed speed or use analog reference for speed such as 0-10v or 4-20mA signal from a controller or a potentiometer. Motor ramp speeds and curves. These are common uses, but there are 100s of more settings.
@kazialtaf1 3 жыл бұрын
Thanks for the information sharing. Please make and share some Information on starting of HV Motors. Soft starters and Triac working.
@realpars 3 жыл бұрын
Hi Altaf! Thanks for your comment and your suggestion. I will pass this on to our course developers! Thanks for sharing and happy learning!
@mnada72 3 жыл бұрын
Thanks. Great videos
@YASEENSULIMAN 4 жыл бұрын
Excellent 👌 thank you for explaining it
@realpars 4 жыл бұрын
Thanks for your support, Yassen!
@liviupopescu3903 4 жыл бұрын
very good video...but i would still use a soft starter and 2 mechanical sensor to stop and start the flow if the tank is full.
@chriscockrell9495 5 ай бұрын
Speed Control is the real driver for the VFD since they cost more with an internal rectifier, DC bus (fiilter), and inverter. While the Soft start is typically just a 6 thyristor package (a gate controlled diode) or basically just an inverter.
@chathurangasamarasinghe8560 3 жыл бұрын
Very useful presentation tnx realpars.
@realpars 3 жыл бұрын
Thanks for your comment!
@adithya5825 4 жыл бұрын
Really well explained 👌👍
@realpars 4 жыл бұрын
Thank you, Adithya!
@rockjack91 2 жыл бұрын
East to understand...thanks
@johntitor7671 4 жыл бұрын
Very useful video,thanks!
@realpars 4 жыл бұрын
Great to hear that, John! Thanks for sharing.
@vinodchauhan837 9 ай бұрын
Thanks a lot. Helped a ton..
@realpars 9 ай бұрын
Glad to hear that!
@marciliosouza1342 2 жыл бұрын
Excellent presentation!!!
@realpars 2 жыл бұрын
Thank you!
@rajkumarjupudi7622 2 жыл бұрын
Tq soooooooooo much good knowledge in this video please follow this type of topics
@realpars 2 жыл бұрын
You're very welcome!
@zaidthakor6054 8 ай бұрын
Amazing ❤ your content are great and smooth 👍
@realpars 8 ай бұрын
Thank you very much! We're happy to hear that
@Rajajaber1977 Жыл бұрын
Excellent boss very good explain
@realpars Жыл бұрын
Thank you!
@Narinwarangkron 5 жыл бұрын
Thanks for great video. 🙏🙏🙏
@realpars 5 жыл бұрын
You are very welcome!
@user-gm3rc2wo4s 4 жыл бұрын
Can you tell me in chinese what is that ? thank you very much.
@Kapinoychannel 3 жыл бұрын
Thank you for the knowledge.
@realpars 3 жыл бұрын
You're very welcome! Thanks for sharing!
@Kapinoychannel 3 жыл бұрын
@@realpars welcome sir. Pls support my channel thank you
@syufrijal 3 жыл бұрын
very cool..thanks for your information sir...so i know the difference between VFD and Soft Starter
@realpars 3 жыл бұрын
You are welcome! Glad to hear that.
@daowara85 2 жыл бұрын
Thanks you for your video. It mean a lot to me.
@realpars 2 жыл бұрын
You are very welcome!
@prasantanayak4324 3 жыл бұрын
Thank you sir for very nice explain
@realpars 2 жыл бұрын
Glad to hear that, Prasanta!
@jaimevillada9150 4 жыл бұрын
Explicación magistral. Si quieren más, que le piquen caña.
@realpars 4 жыл бұрын
Gracias!
@arnulfocordova820 2 жыл бұрын
Thanks so much Very usefull information Saludes desde Honduras
@realpars 2 жыл бұрын
Glad to hear that, Arnulfo! Thanks for sharing.
@pugalstech 3 жыл бұрын
Yr videos is very useful
@ahsanahmed652 4 жыл бұрын
As an electrical engineer this is so satisfying video ever seen. Love from Pakistan.
@realpars 4 жыл бұрын
Thanks a lot, Ahsan. Happy to hear that you are enjoying the course videos. In that case, you will probably enjoy our free course on PLC Hardware as well bit.ly/2XnnUrF Happy learning!
@ahsanahmed652 4 жыл бұрын
@@realpars Sure.
@sohailjanjua123 2 жыл бұрын
Hi, I like your lecture. Thanks
@realpars 2 жыл бұрын
You are welcome!
@Pertamax7-HD 3 жыл бұрын
great detail
@reanult457 4 жыл бұрын
this video is totally awesome, thx
@realpars 4 жыл бұрын
Amazing to hear, Anthony! Thanks for sharing your positive feedback!
@oktaytekin4560 3 жыл бұрын
It was been very usefull lesson.Thank you very much, your explane iş very good.(in İstanbul)
@realpars 3 жыл бұрын
You are welcome! Glad to hear that.
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