TAILIEUCHUNG - Transformer Engineering - Design and Practice Episode 7

Tham khảo tài liệu 'transformer engineering - design and practice episode 7', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 5 Stray Losses in Structural Components The previous chapter covered the theory and fundamentals of eddy currents. It also covered in detail the estimation and reduction of stray losses in windings viz. eddy loss and circulating current loss. This chapter covers estimation of remaining stray losses which predominantly consist of stray losses in structural components. Various countermeasures required for the reduction of these stray losses and elimination of hot spots are discussed. The stray loss problem becomes increasingly important with growing transformer ratings. Ratings of generator transformers and interconnecting autotransformers are steadily increasing over last few decades. Stray losses of such large units can be appreciably high which can result in higher temperature rise affecting their life. This problem is particularly severe in the case of large autotransformers where actual impedance on equivalent two-winding rating is higher giving a very high value of stray leakage field. In the case of large generator transformers and furnace transformers stray loss due to high current carrying leads can become excessive causing hot spots. To become competitive in the global marketplace it is necessary to optimize material cost which usually leads to reduction in overall size of the transformer as a result of reduction in electrical and magnetic clearances. This has the effect of further increasing stray losses if effective shielding measures are not implemented. Size of a large power transformer is also limited by transportation constraints. Hence the magnitude of stray field incident on the structural parts increases much faster with growing rating of transformers. It is very important for a transformer designer to know and estimate accurately all the stray loss components because each kW of load loss may be capitalized by users from US 750 to US 2500. In large transformers a reduction of stray loss by even 3 to 5 kW can give a competitive advantage. 169 .

TỪ KHÓA LIÊN QUAN
TAILIEUCHUNG - Chia sẻ tài liệu không giới hạn
Địa chỉ : 444 Hoang Hoa Tham, Hanoi, Viet Nam
Website : tailieuchung.com
Email : tailieuchung20@gmail.com
Tailieuchung.com là thư viện tài liệu trực tuyến, nơi chia sẽ trao đổi hàng triệu tài liệu như luận văn đồ án, sách, giáo trình, đề thi.
Chúng tôi không chịu trách nhiệm liên quan đến các vấn đề bản quyền nội dung tài liệu được thành viên tự nguyện đăng tải lên, nếu phát hiện thấy tài liệu xấu hoặc tài liệu có bản quyền xin hãy email cho chúng tôi.
Đã phát hiện trình chặn quảng cáo AdBlock
Trang web này phụ thuộc vào doanh thu từ số lần hiển thị quảng cáo để tồn tại. Vui lòng tắt trình chặn quảng cáo của bạn hoặc tạm dừng tính năng chặn quảng cáo cho trang web này.