About gkagrawal.com – G K Agrawal blog
The gkagrawal.com website is an electrical and electronics education blog by the author “G K Agrawal”, B.Tech. (HBTU Kanpur), an R&D expert from the industry Retd Sr DGM – BHEL, and patent inventor.
If you want to learn from a teacher with theoretical and practical experience in the industry, then this blog site by a qualified and experienced professional engineer is for you.
Electrical and electronics education blog by “G K Agrawal”
The “G K Agrawal” website is a blog for free technical education on electrical and electronics education. All the post articles on this blog site are written by me based on my quite long 37 years of industry experience in R&D in new product design in the electrical and electronics engineering field.
Hello! My name is “G K Agrawal” (Gopal Krisna Agrawal). I am B.Sc, B.Tech (HBTU Kanpur), retired Sr DGM – Design (BHEL). I am also the owner of this website. Further, I am also the author of all the content and articles on this blog site.
Read the brief profile of author “G K Agrawal” here.
Mission
Sharing with you, all the knowledge gained by me is my object and mission in life. That to totally free.
At present, I am making content for free educational purposes in text and video forms. This includes topics like electrical, electronics, projects, study tips, practicals, etc. These contents are made based on my industrial experience over the last 35 years working on many projects during my job.
I also own a YouTube channel and have made more than 380 educational videos on the YouTube channel.
Further, I value the eagerness of learning from many people. So, I teach them with full honesty, We respect the interest and time of the learners.
The object and purpose of this blog
Teaching and spreading knowledge is the object of this Technical blog by G K Agrawal. As the articles and posts in this blog are based on industrial experience, so you can get theoretical and practical knowledge both.
More about the expertise of the gkagrawal.com website
You will learn from the people who have expertise in the following technical fields from the industry.
- AC supply
- DC supply
- New product development
- HVDC
- SVC
- Electrical and electronic components
- Electrical noise
- Power factor
- Unbalanced power system
- Control system
- Project design
- Vendor development
- Technical content making
- Technical production document generation
- Educational content making
- Teaching
- Vendor development
- An industry expert from the engineering field by practice
Read a detailed bio of author G K Agrawal here
If you want to know more about me, then Read my detailed professional experience here.
You can also read all the answers in very large numbers given by me in the Quora blog Answers.
A few of the important technical blog posts are Neutral wire voltage, Power factor, Open circuit CT transformer, why 30 mA RCCB breaker, Motor type in train engine, AFCI AFDD breaker, and AC DC supply danger to humans.
Website: https://www.gkagrawal.com
About the author – G K Agrawal B.Sc and B.Tech (from HBTU Kanpur), Retd. Sr DGM Design (BHEL), the inventor of patents, has lifelong industry experience in the electrical and electronics design field of R&D. He worked for BHEL. He shares his experience and knowledge on blogs and YouTube. Read the profile here.
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Jai Hind Agarwal Sir. I am an ex serviceman Amarnath Chaurasia. Your interest in science is an asset to the society. You are the right person for inquiry regarding fundamental concepts.
1. I purchase a fan regulator ( Anchor Penta Panasonic), gave the AC supply with the diode D1 shown in the diagram to use triac a SCR cathode side and put a bulb as a load, working OK.
2. I put an extra circuit to give a negative bias of 25 milliama dc to the gate of triac and cathode and viceversa, as shown in the circuit, just to block the conduction. But bulb is glowing much more, instead of blocking the triac. Kindly explain
3. What type of additional circuit can I put to block the conduction of triac and what bias through the manual switch can be given during normal working half wave AC fan regulator.
Thank you.
Regards
Amarnath Chaurasia
Jai HInd
1 – Sory, that I saw your comment today only.
2 – To switch off triac, no extra circuit is required, you have to just remove gate signal. Do not give any gate current to switch off it.
3- Concept of triac and thyristor is little same for switching it, except the ditrection of the load current.
4 – I made a detailed video on the tyristor working ON OFF concept. YOu can see it on my youtube channel. Giving link for Hindi versiuon. English version is also available.
5 – Negative gate current is required to switch OFF GTO and not for Triac.
Regards
G K agrawal
Thyristor video link
https://www.youtube.com/watch?v=v_xAHOjVE1g
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