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.
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.
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..
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
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, 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 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
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.
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
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
Also with Constant Voltage with High frequency will saturate the Core because core area is fixed for the raising flux , because of higher frequency
Superb, Excellent and informative video with Knowledgeable Person..keep it up
Itne bade concept ko itne easily explain kar diya aapne sirji 🫡🫡🫡🫡🫡
Very informative 👌
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.
Very informative video sir thank you
Sir drive में voltage बढ़ानेसे करंट बढ़ता हे...??
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..
Sir plz make a video on speed control of induction motor
Very helpful and to the point thank you sir
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
Pls explain how to decide braking resistor value when regenerative voltage?
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 ?
Thanks for good knowledge boss
Sir please make a video on input and output chokes of VFD drives. And what is the purpose of using them.
Very informative
Sir one video for line choke use for VFD Drive please shot video sir kyo lagate hai...
Sir DTC mode par video banaiye n
Sir what is the formula for calculating the breaking capacity of breaker (vCB)
Totel how many motor control mode please explain?? For example vector control mode, sensor less control mode .
Very good video sir
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
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 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 vfd ki frequency change karne par moter ki efficiency par kya fark padta h
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.
Prv ke liye NO NC samjha dijiye sir
Nice video 👍
with vfd we can control torque as well as speed then why do we use gearbox?
soft starter and auto transformer starter are same ?
Continue 👊
Sir how voltage to be varied to maintain constant V/F ratio.
Using Potentiometer
Vary PWM patterns
Vector control k barre me bhi kuch bataiye sir
Sir VFD ko relay ke threw forward and reverse and inching and programming bataye pls
Sir make telegram channel for cement industry requirement related
Why we cannot use dimmer to change the voltages?
Sir please VFD vector and scler mode video
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
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
Very nice
Sir please upload alternator protection video.
RMU connection and install process ke upar video kariye sir
Vfd me F Kam karne se voltage Kam hota hai ya bathata hai
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 .....
VVFD where used please make one video VVFD and VFD different
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 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
Thanks sir
Thank
Sir in a soft starter v/f ratio is constant or not? Why
Softstarter only reduce voltage at starting , frequency always 50Hz
Pls specify with numerical example
To Keep torque constant,and vary speed.
🙏🙏👍👍
Why v by. F ratio is constant
Sir types of electrical maintenance pe ek video banaa dijiye plz sir kaafi time se aapko request kar raha hu
Or sir current
Don't just show your face & tell story .
Give atleast general block diagram & explain on that.