महाराणा प्रताप ट्रेल सज्जनगढ़ उदयपुर में इको ट्रेल 30 नवम्बर को राजस्थान वन विभाग उदयपुर डिविजन तथा WWF-India उदयपुर डिविजन के सानिध्य में महाराणा प्रताप ट्रेल सज्जनगढ़ उदयपुर में इको ट्रेल की गई, जिसमें WWF-India के स्टेट काॅर्डिनेटर श्रीमान अरूण सोनी तथा वन विभाग कीे ओर से डाॅ. सतीश कुमार शर्मा, सेवानिवृत्त अधिकारी मौजूद थे। मुझे भी इस इको ट्रेल में जाने का सुअवसर प्राप्त हुआ, जो गोरीला व्यू पाॅइंट से बड़ी-लेक व्यू पाॅइंट तक की गई इसमें मुझे विज्ञान की एक नई शाखा के बारे में पता चला, जिसे टट्टी विज्ञान कहा जाता है। सुनने में आपको थोड़ा अजीब लगेगा, मुझे भी सुनकर हैरानी हुई, परन्तु वास्तव में एक ऐसा भी विज्ञान है, जिसके बारे में डाॅ. सतीश शर्मा ने बड़े ही विस्तार पूर्वक बताया कि किस प्रकार वनों में जानवरों की टट्टी देखकर यह पता लगाया जा सकता है कि यहां कौनसा जानवर आया था। जानवरों की टट्टी कितनी पुरानी है, वह गीली है या सूखी है। इसी के आधार पर उस विशेष जंगल में कौन-कौनसे जानवर विचरण करते हैं, उसके बारे में वन विज्ञान के कर्मचारी पता लगा लेते हैं। जानवरों की टट्टी का विश्लेषण करके यह पता लगा...
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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