Publick presentation on unbalance response estimation and suppression with thrust magnetic bearings given at VNIT, Nagpur at NCCM 2024, October 4,5 2024

                                                      

Sulzer Frank Gas turbine controls notes

 Saw video on 10-Aug-2024

1. 1939  ABB Switzerland - 4MW gas turbine had 17.4% efficiency
2. Installed by Prof  Stodola
3. ran till 2002
4. acquired by Alstom in 2005
5. V94.2 Industrial grade gas turbine with silo type combustor
6. bearings: Siemens bearings of gas turbines are sealed
7. Alstom bearings are accessible during operation
8. Combustion can be diffusion flame or premixed flame.
9. diffusion : only outer perphery of yellow flame touches oxygen. inside CH4 is unburnt.
10. Premixed: CH4+O2 already thoroughly mixed, blue flame
11. VIGV =  to vary the air mass flow rate to control
12. EGT: not enter unstable combustion zone.
13. sero actuator valves pid are tuned to have one overshoot and no undershoots, used in the fuel supply lines.
14. TUning of pid controllers are done at 50% open position
15. in case control signal to the control valve is interrupted like cable cut, the spring loaded valve must close the line in 200 ms
16. double side block and bleed are required before opening fuel gas pipelines for repair
17. lvms: vibration diagonostics for insity balancing of turbines
18. temperature should drop when bleed valve closes
19. startup burner is diffusion burner
20. run up premixed burner
21. power producing turbines are of 3 manufacturers
1. ge= frame 9
2. siemens = v94.2
3. alstom =13e2
22. fame = fatty acid material esters in pipe lines that use vegetable oil attack seals of ball valves.

MIktex download and update error

 

Default download for miktex from ctan mirror:

https://mirror.niser.ac.in/ctan/systems/win32/miktex/setup/windows-x64/basic-miktex-24.1-x64.exe

The above mirror is not working most of the time.

So changed the mirror by manually changing the ctan mirror in the url to:

https://in.mirrors.cicku.me/ctan/systems/win32/miktex/setup/windows-x64/basic-miktex-24.1-x64.exe

When updating from miktex console, Got errror that update not possible due to ctan server not replying. Error message was time out error

code="28", url="https://in.mirrors.cicku.me/ctan/systems/win32/miktex/tm/packages/miktex-zzdb3-2.9.tar.lzma"

Changed the ctan mirror miktex uses from NISER server to CICKU

mpm --set-repository="https://in.mirrors.cicku.me/ctan/systems/win32/miktex/tm/packages/"

IISC open day contacts:

 IISC Bangalore open day on Saturday 24 February 2024. 
Photos and contact details from the visit:

Funding opportunities for start ups under stem cell fund:

Magnetic levitation stage for precision positioning in the nanometer scale: 

Diamagnetic levitation, PCB coils, graphite middle layer, magnet floats, use closed loop positioning

Constant in the differential equation itself is being changed 

(m,c,k in (ma+cv+kx=f)) with electromagnets to actuate the system instead of using 

force to actuate. Classic example: Vibrating inverted pendulumn on a speaker.

Electro static discharge testing facility at IISc embedded system development:

Voltage interference testing at IIsc for embedded system development:

Compliance testing for embedded system development:

Contact details for compliance testing in embedded system development at IISc

Hydraulic piston and cylinder arrangement with syringes:

Base excitation of multi storeyed building, earthquake simulation for studying the resonance frequency of buildings

Manufacturer of horizontal excitation table:

Switched reluctance motor (SRM) development by Prof G Narayanan

BH curve characterization for electromagnetic core materials

Plotting the BH curve of small transformer cores, showing the hysteresis region with xy plots

Power amplifier for BH curve characterization 

TMS 320 based embedded controller (DSP) with thrust bearing in the background

Schematic of AMB testing rig at IISc

Controller and power amplifier for AMB

Paper by Dr Kamisetty on power amplifiers for AMB (1)

Paper by Dr Kamisetty on power amplifiers for AMB (2)

SRM motor torque control

Close up of radial AMB

Homopolar type AMB for thrust bearing using pot core. I did this in 2017.

H bridge driver for homopolar bearing and core of the homopolar thrust bearing (grey coil , 3d printed)

Demonstration model of radial AMB setup

Dr Kamisetty and his friend at AMB lab. Dr Ashutosh not present for 

exhibition. Dr Shahjahan, who made this last year during PhD has settled in UK

Kamisetty (2)

Kamisetty (3)

Radial AMB and homopolar thrust AMB

Closeup of thrust AMB (1)

Closeup of thrust AMB (2)

Closeup of thrust AMB (3)

SRM motor design tool

Thank you.

Funding opportunities from Government for projects

1. TDB = Technology development board = http://tdb.gov.in/
   
2.  iDex = https://idex.gov.in/
   
3. HAL indegenisation items target list = https://hal-india.co.in/Common/Uploads/pdfs/indg/1.pdf
4. Defence India Startup Challenge = DISC = https://idex.gov.in/challenge-categories
   
5. Atal Innovation mission = AIM = https://aim.gov.in/
   
6. Jyothy institute of technology = AICJITF.org
7. Nidhi Prayas Grant = https://www.nidhi-prayas.org/#parentVerticalTab11
   
8. SASACT = Meitystartuphub.in
9. Drishti = https://msh.meity.gov.in/program/mshcorporate/drishti
   
10. SISFS = Startup India Seed Fund Scheme (SISFS) aims to provide financial assistance to startups for proof of concept, prototype development, product trials
11. TIDE 2.0 = Technology Incubation and Development of Entrepreneurs (TIDE 2.0) is a program supported by the Ministry of Electronics and Information Technology (MeitY)
12. Funding support = 30K/month for 1 year, www.sastratbi.in

 

1. LITE = Private company on engineering education suppport, pupilfirst.org
2. ForgeForward.in (Private industry)