PUT - Programmable Unijunction Transistor (Basics, Structure, Symbol, Working & Characteristics)
ฝัง
- เผยแพร่เมื่อ 17 ต.ค. 2024
- PUT - Programmable Unijunction Transistor is explained with the following Outlines:
1. PUT - Programmable Unijunction Transistor
2. PUT Basics
3. PUT Structure
4. PUT Symbol
5. PUT Working
6. PUT Characteristics
7. PUT Applications
Chapter-wise detailed Syllabus of the Power Electronics Course is as follows:
Chapter-1 Power Semiconductor devices: • Power Semiconductor De...
Power Diode, Power BJT, SCR - Silicon Controlled Rectifier, Dynamic Characteristics of SCR, Gate Characteristics of SCR, SCR Triggering methods, Turn of OFF process of SCR, SCR Protection, Thermal Protection of SCR, Two Transistor Analogy of SCR, SCR Mounting, Resistor Triggering of SCR, RC Triggering of SCR, Methods to improve di/dt ratings of SCR, UJT - Uni Junction Transistor, UJT as Relaxation Oscillator, PUT - Programmable Unijunction Transistor, PUT as Relaxation Oscillator, TRIAC in Power electronics, Modes of TRIAC, DIAC in Power electronics, Comparison of SCR, DIAC and TRIAC, SCS - Silicon Controlled Switch, MCT - MOS Controlled Thyristor, Power MOSFET, Comparison of Power BJT and Power MOSFET, IGBT - Insulated Gate Bipolar Transistor, LASCR - Light Activated SCR, GTO - Gate Turn OFF Thyristor, Series Connection of SCR, Parallel Connection of SCR.
Chapter-2 Commutation of SCR: • Commutation in Power E...
Class A Commutation, Class B Commutation, Class C Commutation, Class D Commutation, Class E Commutation, Class F Commutation.
Chapter-3 Rectifier in Power Electronics: • Rectifier in Power Ele...
Basics of Converter, Rectifier and filter, Halfwave controlled rectifier, Single phase full wave controlled rectifier, Fullwave bridge controlled rectifier, Symmetrical Semiconverter, Asymmetrical Semiconverter, Three Phase Half wave rectifier, Three phase half wave controlled rectifier.
Chapter-4 Inverter in Power Electronics: • Inverter in Power Elec...
Series Inverter, Parallel Inverter, Single Phase Half Bridge Inverter, Signal Phase Full Bridge Inverter, Three Phase Inverter 120 Degree Mode, Three Phase Inverter 180 Degree Mode, PWM Inverter.
Chapter-5 Chopper in Power Electronics: • Chopper in Power Elect...
Control Strategies of Chopper, Step Up Chopper, Step Down Chopper, Class A Chopper, Class B Chopper, Class C Chopper, Class D Chopper, Class E Chopper, Jones Chopper, Morgan Chopper.
Chapter-6 Cycloconverter in Power Electronics: • Cycloconverter in Powe...
Cycloconverter, Basics of Cycloconverter, Step Up Bridge Cycloconverter, Step Down Bridge Cycloconverter, Step Down Cycloconverter, Step Up Cycloconverter, Three Phase to Single Phase Cycloconverter.
Chapter-7 Converter in Power Electronics: • Convertor in Power Ele...
Buck Converter, Boost Converter, Buck Boost Converter, Flyback Converter with discontinuous mode, Flyback Converter with continuous mode, Isolated Forward Converter.
Chapter-8 Application of Power Electronics: • Power Electronics Appl...
On Line UPS, Off Line UPS, SMPS, Comparison of SMPS with Linear Power Supply, Dielectric Heating, Induction Heating, Battery Charger.
Engineering Funda channel is all about Engineering and Technology. Here this video is a part of Power Electronics.
#PUT #Thyristor #PowerElectronics @EngineeringFunda
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Sir,In this way anode will be negative because it is directly connected to negative off VBB
sir, how its reverse bias junctionJ3 gets turning ON without application any external voltage as in case of SCR we apply at this junction gate current to make a channel by apply +ve gate voltage . by application of this +ve voltage, minority carrier in the respective area in this case lower P region electrons concentration increase and they provide path to flow of anode current. but in PUT how the current is flow without J3 biasing changed? pls clarify sir.
sir, as the name suggests put ( unijunction ) it has to be only 1 junction, but in structure you have shown as a 3 junction device. please justify my doubt sir.
I think it's because "One junction is being programmed or in other way you can say controlled". One junction is being controlled.
Hello,
I think the negative terminal of V_bb should be connected to ground and not to anode for V_G = V_bb(R3/R2 + R3).
Correct
Alot of thank you sir
How VG( gate voltge) will vary because R 3 resistance seems to be fix.
Bt sir u have explained that 'VG ' will vary by adjusting R3 Resistance . How ?
Sir,VBB negative should be grounded, not to be connected across R1
Can u please explain synchronised UJT triggering....
thaanks sir
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Thank you very much sir
Nyc videos sir ur awesome
Your welcome
How come time period is only depended on R2?
Hii Sir muze video me 7.30 wala equation nahi samza.why Vg=...........please tell me
Indian pets rohan joshi Vg is based on voltage divider rule
Engineering Funda thank you very much
@electronic funda . sir, as the name suggests put ( unijunction ) it has to be only 1 junction, but in structure you have shown as a 3 junction device. please justify my doubt sir.
yes
For this you have to understand working
Of ujt and after you know that working is similar but we can change intrinsic stand off ratio but in ujt we can't.
what u mean is that it is 3 TERMINAL DEVICE not 3 JUNCTION DEVICE...there is only one P-N Junction
PUT has three junction but why it is called programmable unjunction transistor..?
Please sir give information about turn on and turn off methods of PUT
By positive pulse PUT can be turned ON and by negative pulse PUT can be turned OFF
After that we need to see the ratings of PUT and one can use it in circuit
Negative terminal of vbb should be connected between R4 &R3
nyc explanation sir...every thing is fine but why the video is being paused every time plzzz avoid this
Till now I have not paused video single time. I think you should check out internat connection
+Engineering Funda no sir tge problem is that timing is going on and there is no sound for some time
your circuit at 7.00 seems to be wrong. Pls check it.
It's perfectly fine
Vgg = Vbb(r2/(r2+r3)) How Come ?
Voltage devider rule
Sir can you give us notes of PUT in pdf format
Sir,if I am wrong,reply please
Power BJT lecture nhi h vedio m
It is there in my power electronics playlist. I think it is there in 3rd video of playlist.
Battery connection is wrong,
English ke sat Hindi me batavo Sir
'minority' current