VFD Control Methods | Scalar Mode | Vector Mode

[@SurajsinhKarande]

2 din se scalar or vector me pareshan tha ... Ab jaki bat palle padi 😂🤗🙏🙏🙏 Thankyou very much Sir.

[@Nareshkumar-bw3od]

Thank you sir I want to more videos for power generation

[@rizwanzafar9809]

AMAZING EXPLANATION SIR. VERY INFORMATIVE. THANKS SIR.

[@gramanathapai8477]

Very nice Sir. Thank you

[@tharindumaduwantha1023]

very very valuable explanation sir, great work thank you very much sir

[@vishwasjadhav1087]

Very nice Sir..... Bahut hi aasan tarike se explain kiya...hai aapne... Aapke baki bhi video dekhunga... Thanks 👍

[@SanjayRajput-zy2op]

Very nicely clearly and brilliantly explained facing the same problem of starting torque

[@jayaramanneelatur9178]

Too good sir. ThankQ

[@acvsingh47]

VFD at a glance excellent 👌👌

[@sachinkalariya887]

Very informative,👍

[@jeeimran7329]

When we select vector cantrol moter slect must b good brand?

[@subrahmanyamjuttuka7347]

Well explained

[@siddhartha501]

very Informative

[@mukundshinde6987]

Sir suppose one motor I have high efficiency motor that name plate on 415 volt 50HZ frequency now as per your discussion you told maintain the v/f ratio..... suppose i want to run motor over speed line 2000 rpm by vfd now frequency required like near about approximately 66.67 hz ...now take our first condition maintain V/F ratio so voltage goes 553.361 volt....now here clearly visible voltage as per 8.3 ratio ....can motor insulation withstand upto 553.36 volt......this is not possible so some condition only used this V/F ratio constant method

[@dineshdiwani]

Name plate data suggested max limit to operate any motor at normal or full load. Though 10-20% safety margins are considered while designing a motor. I have run motor with VFD at 110% rpm of rated that works well and insulation withstands. Going beyond that may fail one of its designed data.

[@gurpreetsinghpreet2846]

Sir nice. Plz upload more videos

[@kumarsp8109]

Amazing ❤

[@pankajsanwal2010]

sir there is any relation of motor's ID run and id component of vector mode ? Please throw some light on this topic. thank you.

[@dineshdiwani]

Yes . Through ID run... It draws vector diagram of resultant torque

[@kanhayabanjara1325]

Very good sir thank you

[@dineshdiwani]

Thank you

[@pushpendrayadav7919]

Thanks for that video , sir please make video about VFD Communication with plc and pid controllers

[@dineshdiwani]

Sure. Noted

[@TahirKhan-jadoon]

Bhai koi si bhi ac vfd mein solar panel se DC voltage dekar chalaya ja sakta hai

[@dineshdiwani]

theoritically yes, but practically you need to bypass all the healthy interlocks of rectifier to make vfd ready signal ok

[@perwezaazam6355]

Sir i want to know which parameters available selection scaler & vector in danforce drive

[@dineshdiwani]

Check for VFD mode or control mode?

[@akashmanusmare7198]

Very nice Sir 👌

[@Tarasvat_team]

Thank you Sir, Sir can i use Encoder as Pulse Input to VFD and run Induction motor in 1:1 or 1:1.2 ration that what ever i want. If yes then please Suggest me VFD model

[@dineshdiwani]

Yes you can use pulse encoder with encoder interface card if VFD doesn't accept direct pulse input. You can google model or make which accept encoder pulse input as speed feedback.

[@Tarasvat_team]

@@dineshdiwaniThank you Sir, i have VFD which accept pulse and run when i give Pulse from Encoder. But, How can i get 1:1 ration .

[@dineshdiwani]

@@Tarasvat_team which make and model you have... Let me check

[@Tarasvat_team]

@@dineshdiwani ​ @dineshdiwani Sir, i have "TAILI MOTOR make G Series closed loop vfd". you will get manual online I also have " Delta make DVP 10PM plc " i am giving pulse from encoder to PLC, want to run STEPPER/ SERVO in 1:1 and 1:1.2 ratio. SIr,can you guide me?

[@intajarali828]

sir can we run a motor above its nameplate speed using vfd

[@dineshdiwani]

Yes.. you need to provide Max freq in VFD while entering motor data..

[@mr.laxmidharpatra2608]

Very nice sir🙏🙏

[@Viralmanish1993]

Hi sir... your best teaching videos and information....

[@mdmasoodalam1188]

Great sir

[@ankitkumarinstrumentationv5625]

Please make video with brief explanation

[@dineshdiwani]

On what topic?

[@shilusahdev6808]

Make video servo motor and encoder

[@pramodsahoo1375]

Sir, thanks for this video. Please please make a video detail about s120 vfd. It will helpful for me and also other. Heartly Thank you

[@dineshdiwani]

There are number of make and types of VFD available in market. Nobody works on all kinds so do I. But fundamentals remain the same for all. That's why I cover only fundamental part of VFD operation and troubleshooting.

[@sudhirkumar-hy5gr]

Nice sir

[@vatsalgokani261]

Can we run 2 pole 22 kW motor at 6300 rpm? If yes which motor? And how?

[@dineshdiwani]

A motor is recommend to run at 5% higher than rated rpm with vfd. If this motor rated rpm is 6000 rpm then no issue. As it's bearing and cooling system is designed for rated rpm.

[@baikunthalenka2776]

Dtc explain please

[@lalitpandey8023]

Nice one sir, please explain different type of torque based application and there programming criterion.

[@dineshdiwani]

Sure.. I will upload a video explaining VFDs 4 quadrant application. That would help you understand.

[@lalitpandey8023]

@@dineshdiwani Thank you sir 🙏

[@tulindasgupta6661]

Sir why id run is control in dtc mode not scalar mode

[@dineshdiwani]

Because in scalar mode is more for speed control at constant torque. So if don't the exact nature of load it will deliver output at varied Freq while maintaining a constant load. While in DTC mode your load is always of varying nature and to contact perfectly you need exact design of load connected and autotune test draws a mathematical model of load connected and controls current at even zero speed. That's the beauty of DTC mode.

[@SanjayRajput-zy2op]

Respected sir I am having a problem with a asynchronous motor of 11 kw vfd connected. The problem is motor drives a spindle with pully belt but in the starting the motor doesn't start on its own i have to rotate the spindle wheel connected to motor with belt then after it starts rotating now in vfd i did use the torque boost option also but no result.

[@SanjayRajput-zy2op]

Initially when command is given the current rises to more than itz rated and current keeps being stable at that point around 26A vfd also doesn't trip even after i did enter all motor parameters. So could u please share something on it plzz sir

[@dineshdiwani]

Ensure VFD in vector control mode and current boost setting is 300% if option available or what is maximum available. Even after it doesn't start its own then load demanding higher size motor. Because starting current supplied you mentioned 26 A is not sufficient to move the spindle and it won't trip the motor coz may be VFD is of higher size or motor data not supplied to VFD is not matching. Better perform hot auto tuning for VFD to know motor behaviour. Check and revert Last thing will be motor of higher you require i think

[@SanjayRajput-zy2op]

@@dineshdiwanii am very much obliged by ur response sir. Thank u so much. As per boosting torque is concern I have 30% max range and did upto 20%. But still standstill spindle but as u mentioned i did autotuning. While doing so there were two options like how to perform auto tuning first in static mode or second in running mode. I chosed first in static the spindle did started moving sir but now I have another problem.

[@SanjayRajput-zy2op]

@@dineshdiwani the other problem is the motor i have employed is in cnc machine purpose. I have provided analog input too from the fanuc controller

[@dineshdiwani]

@@SanjayRajput-zy2op you need to decouple motor from spindle for dynamic tuning, it's always good to go for dynamic tuning.

[@anaglokesh7511]

Dear sir , i understand the video I had a doubt that , how maximum torque is achieved in 0 Hz , what makes the drive to be torque constant and rpm variation , please explain with some calculation ...how torque remains constant in various rpm

[@anaglokesh7511]

Specially that Iq (responsible for torque ) and Id ( responsible for rotating )...here need some calculation with example

[@dineshdiwani]

Constant torque characteristics are basically shown by DC motor... That AC motor can't have when simply run on scalar mode. It is vector mode that made possible by rearranging Iq and I'm vector at 90 deg which ensure operation of AC motor as DC motor. It involves very complex calculations and done in real time in microprocessor unit of vfd. This process almost distort AC motor torque speed curve to give max torque at zero speed. My video is just a bit an explanation in this direction.

[@dineshdiwani]

For calcutions to be perfect, cold auto tuning is required where microprocessor draws motor's mathematical model and regulates current vectors in real time.

[@anaglokesh7511]

Sir , while stopping IM , we know three breaking methods and as I have a doubt in some applications we use DBR and in some we don't ? and breaking methods changes as per application in drives ?

[@dineshdiwani]

@@anaglokesh7511 when power loss is not criteria only braking is important and no speed control is required, in small applications, then DBR is supplied also rectifier in vfd is a kind of uncontrolled fixed one, hence cost comes down, with this arrangement you cannot feedback power to grid. So power is wasted on DBR. When drive is bigger and speed control is required then at the time of speed reduction, regeneration power is fed back to controlled rectifier available in VFD. It's cost is higher compare to uncontrolled one.

[@pankajsanwal2010]

👍, but this chapter demand little bit extra lenth to explain entire topic.

[@dineshdiwani]

Endless.. but people hardly stick to one video more than 10 mins.. may be in coming videos more wil be covered.

[@pankajsanwal2010]

@@dineshdiwani hardly 10 minutes ! starnge . this topic is not matter to entaintainment. There is a large number of people who know less about this subject and want to increase their knowledge. I hope you will create a video series that will be able to increase the understanding of the entire subject.

[@tulindasgupta6661]

Sir I want to leart from you is it possible

[@dineshdiwani]

Always... Whatsapp me on 9714181982 anything you want to ask. I will try to satisfy your queries whatever you have in a better way.

[@manmohangupta987]

Sir, please explain winder application on any drive separately

[@dineshdiwani]

Sure..Will explore

[@astrotak6399]

How to stop motor instantly by using VFD.

[@dineshdiwani]

By DC injection method by VFD but for high inertia load... For small inertia load DBR braking is enough to stop motor immediately.

[@publikjuli]

Why does he speaks in English for a sentence then switch back to something else?!