{ "item_title" : "VFD Challenges for Shipboard Electrical Power System Design", "item_author" : [" Mohammed M. Islam "], "item_description" : "This book investigates the problems presented by variable frequency drives (VFDs) as they are applied in shipboard power generation and distribution system design. VFDs with configurations such as six pulse drive, 12 pulse drive, 18 pulse drive, active front end, pulse width modulation and many others generate many different levels of harmonics. These harmonics are often much higher than the regulations allow. The author provides multiple techniques for surmounting these difficulties and providing ships with efficient energy that minimizes mechanical and electrical stress.", "item_img_path" : "https://covers3.booksamillion.com/covers/bam/1/11/946/338/1119463386_b.jpg", "price_data" : { "retail_price" : "64.95", "online_price" : "64.95", "our_price" : "64.95", "club_price" : "64.95", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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