Why V/F Ratio is Maintained Constant in VFD | Variable Frequency Drive | Hindi
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- เผยแพร่เมื่อ 26 ส.ค. 2024
- Queries Solved:
1. Why V/F Ratio is Maintained Constant in VFD.
2. Variable frequency drive.
3. Torque in induction motor.
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Thank you.
very informative sir, I wanna add something v/f ratio is proportional to flux density if we not constant flux density hysteresis loss in motor core increases because in case of flux density not constant hysteresis loss inversely proportional to the frequency and proportional to the voltage, means if we run motor at normal voltage at low frequency that cause heating in the motor this is also can be a reason. if we constant v/f ratio hysteresis loss is proportional to the frequency.
That's the point
Thank you sir for most help
Sir. when I gave the interview I was afraid because I had full knowledge but I could not explain that knowledge fully
So how to remove Fear in interview. Please make a video related remove fear in interview.
Superb, Excellent and informative video with Knowledgeable Person..keep it up
Sir please make a video on input and output chokes of VFD drives. And what is the purpose of using them.
Siemens k VFD mai parameter kaise set kare.. Or fault ko clear kaise kare?? Or Reset kaise kare VFD ko or reset karne se kiya sab delete ho jayega program please detail mai ek video
Sir v/f waha use krte hai..jaha humara variable torque hota hai..
Or vector control waha use krte hai jaha hume constant tourque chaiye hota hai..
Isiliye hum v/f ke case main energy saving kr pate hai..
Vector main nhi..kyunki vector control frequency toh chnge hoti hai..par motor terminal par voltage torque ke according chnge hota hai..
If we have problem of low input voltage due to which the motors are burnt, can we use the VFD, which allows the frequence to drop, keeping v/f constant and enabling the motor to produce a constant torque ?
Sir drive में voltage बढ़ानेसे करंट बढ़ता हे...??
Sir vfd m hum motor rpm ko kam jyada karne k liye Frequency aur voltage dono vary karte hain
Lekin jab motor 1500 rpm p run karti h toh frequency 50 hz aur voltage 6.6 kv hota h
Fir 1800 rpm p run karte hain toh Frequency 60 hz hoti h lekin voltage 6.6 kv hi kyu rahta voltage kyu nhi badhta
Sir DTC mode par video banaiye n
Sir plz make a video on speed control of induction motor
Motor overloads at 10hz frequency at full load and no load both. What is the issue ? Is there any solution for that. I know it should not be less than 15hz for normal induction motor but i need it to go that low sometimes.
Hi Abhishek sir,I have one query why CT base relay taken ammeter feedback only from Y phase not from R & B -phase.Explain it with technical info .....
Sir VFD me input current high output current low kyon hota hai at 50hz par bhi .is par video banao
Input pe current low and output pe high hota hai
Very informative 👌
Very informative video sir thank you
Thank
Sir, I have connect one motor with vfd but the motor operated with dol starter on off push button. Is it possible? If possible then please send the connection drawing. Waiting for your reply.
Sir what is the formula for calculating the breaking capacity of breaker (vCB)
Sir make telegram channel for cement industry requirement related
Very helpful and to the point thank you sir
Totel how many motor control mode please explain?? For example vector control mode, sensor less control mode .
Sir vfd ki frequency change karne par moter ki efficiency par kya fark padta h
with vfd we can control torque as well as speed then why do we use gearbox?
Prv ke liye NO NC samjha dijiye sir
Very good video sir
Thanks for good knowledge boss
Very informative
Vector control k barre me bhi kuch bataiye sir
soft starter and auto transformer starter are same ?
RMU connection and install process ke upar video kariye sir
🙏🙏👍👍
Sir VFD ko relay ke threw forward and reverse and inching and programming bataye pls
VVFD where used please make one video VVFD and VFD different
Nice video 👍
Sir please VFD vector and scler mode video
Why we cannot use dimmer to change the voltages?
Very nice
Continue 👊
Sir please upload alternator protection video.
To Keep torque constant,and vary speed.
Vfd me F Kam karne se voltage Kam hota hai ya bathata hai
Thanks sir
Or sir current
Are there disadvantages of low voltage applying to motor through vfd due to maintaining v/f ratio constant?
The VFD have function IR compensate to boost voltage at low frequency
Sir please make a video on full wave rectifier when input ac voltage is 220 and output voltage 320v and what's it's solution
It's due to Vrms voltage of DC waveform
Sir ek doubt tha agar, vfd me input bhi ac hai or output bhi ac hai phir usse dc me convert hi kyu kar rhe hai iska ek proper reason dije or vfd me aisa kya laga rehta hai jo uske frequency ko vary kar raha hai
Freqency ko kam jayada karne ke liye hi ac to DC phir (rectifier) phir DC to ac (igbt invertor circiut) kiya jaata hai igbt ke switching se frequency kam jaada hota hai vfd single phase input three phase out pu or three phase input three phase output dono model mai aataa hai jaada rating ki motor ke liye three phase input vaala vff use kiya jaata hai single phase ho ya three phase vo input hone ke baad DC hi banta hai phir DC to ac banta hai varieble frequency ke saath
Freqency ko kam jayada karne ke liye hi ac to DC phir (rectifier) phir DC to ac (igbt invertor circiut) kiya jaata hai igbt ke switching se frequency kam jaada hota hai vfd single phase input three phase out pu or three phase input three phase output dono model mai aataa hai jaada rating ki motor ke liye three phase input vaala vff use kiya jaata hai single phase ho ya three phase vo input hone ke baad DC hi banta hai phir DC to ac banta hai varieble frequency ke saath
Pls specify with numerical example
Sir but VFD me ac to DC or DC to AC conversion q hota hai.... Or direct veriable transformer q nahi use karate speed control ke liye...
Bhai tfr se frequency change nahi hota isliye invertor circuit use karte hai
Sir types of electrical maintenance pe ek video banaa dijiye plz sir kaafi time se aapko request kar raha hu
Why v by. F ratio is constant
Sir can u explain whats happening if we increase frequency abov 50Hz in drive ??
The flux of motor reduce proportional, So the torque of motor also reduce
Sir in a soft starter v/f ratio is constant or not? Why
Softstarter only reduce voltage at starting , frequency always 50Hz
Sir how voltage to be varied to maintain constant V/F ratio.
Using Potentiometer
Vary PWM patterns