भारतीय रसायन के पिता आचार्य प्रफुल्ल चंद्र रे की जयंती पर व्याख्यान का आयोजन विज्ञान भारती उदयपुर इकाई एवं बीएन कॉलेज ऑफ फार्मेसी, बीएन विश्वविद्यालय के संयुक्त तत्वावधान में कार्यक्रम सम्पन्न उदयपुर, 2 अगस्त। भारतीय रसायन के पिता आचार्य प्रफुल्ल चंद्र रे की जयंती के अवसर पर विज्ञान भारती उदयपुर इकाई (चित्तौड़ प्रांत) एवं बीएन कॉलेज ऑफ फार्मेसी, बीएन विश्वविद्यालय के संयुक्त तत्वावधान में एक विशेष व्याख्यान का आयोजन किया गया। कार्यक्रम का उद्देश्य आचार्य पी.सी. रे के वैज्ञानिक योगदान एवं उनके देशभक्ति से ओतप्रोत जीवन पर प्रकाश डालना था। ज्ञातव्य है कि भारत की पहली फार्मा कंपनी आचार्य रे ने ही बंगाल केमिकल एंड फार्मास्यूटिकल्स लिमिटेड, कोलकाता में 1901 में प्रारंभ की थी। कार्यक्रम में विज्ञान भारती के उद्देश्य एवं गतिविधियों की जानकारी डॉ. अमित गुप्ता द्वारा दी गई। आचार्य पी.सी. रे के जीवन और कार्यों पर मुख्य व्याख्यान डॉ. लोकेश अग्रवाल द्वारा प्रस्तुत किया गया। उन्होंने बताया कि कैसे आचार्य रे ने विज्ञान को समाज की सेवा का माध्यम बनाया और रसायन विज्ञान में भारत को आत्मनिर्भर बनान...
Introduction of power electronics
- Power electronics belongs partly to power engineers and partly to electronics engineers. It means it is the combination of power engineering and electronics engineering.
- Power engineering is mainly concerned with generation, transmission, distribution and utilization of electric energy at high efficiency.
- The simple engineering is guided by distortion-less production, transmission and reception of data and signals of very low power level of the order of a few watts, or milliwatts without much consideration of the efficiency.
- Power electronics is also known as industrial electronics.
- The apparatus associated with power engineering is based mainly on electromagnetic principles, whereas in electronics engineering they are based on physical phenomenon in vacuum, gases/vapours and semiconductors.
- This subject concerns the application of electronic-principles into situations that are rated at power levels rather than signal levels.
- It may also be defined as a subject that deals with the apparatus and equipment working on the principle of electronics, but rated at power level, not at signal level.
Applications of Power electronics
Aerospace
- Space shuttle power supplies
- Satellite power supplies
- Aircraft power systems
Commercial
- Advertising
- Heating
- Air conditioning
- Central refrigeration
- Computer and office equipment
- Uninterruptible power supplies
- Elevators
- Light dimmers and flashers
Industrial
- Arc and industrial furnace
- Blowers and fans
- Pump and compressors
- Industrial lasers
- Transformers
- Tap chargers
- Rolling mills
- Textile mills
- Excavators
- Cement mills
- Welding
Residential
- Air-conditioning
- Cooking
- Lighting
- Space heating
- Refrigerators
- Electric-door openers
- Dryers
- Fans
- Personal computers
- Vacuum cleaners
- Washing and sewing machines
- Light dimmers
- Food mixers
- Electric blankets
- Food warmer trays
Telecommunication
- Battery chargers
- Power supplies (dc or UPS)
Transportation
- Battery chargers
- Electric locomotives
- Street cars
- Trolley buses
- Subways
- Automotive electronics
Utility system
- High voltage dc transmission (HVDC)
- Excitation systems
- Static circuit breakers
- Fans and boiler-feed pumps
- Supplementary energy systems (solar, wind)
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