翻訳と辞書 Words near each other ・ Dynamic programming ・ Dynamic programming language ・ Dynamic provisioning environment ・ Dynamic psychiatry ・ Dynamic publishing ・ Dynamic quartz recrystallization ・ Dynamic random-access memory ・ Dynamic range ・ Dynamic range (disambiguation) ・ Dynamic range compression ・ Dynamic recompilation ・ Dynamic recrystallization ・ Dynamic rectangle ・ Dynamic binding (chemistry) ・ Dynamic braking ・ Dynamic braking (locomotive) ・ Dynamic Business Modeling ・ Dynamic business process management ・ Dynamic capabilities ・ Dynamic carrier control ・ Dynamic Cascading Style Sheets ・ Dynamic Cassette International ・ Dynamic causal modelling ・ Dynamic China ・ Dynamic Chiropractic ・ Dynamic circuit network ・ Dynamic combinatorial chemistry ・ Dynamic combustion chamber ・ Dynamic compaction ・ Dynamic compilation Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Dynamic braking (locomotive) ： ウィキペディア英語版 Dynamic braking (locomotive) Dynamic braking is the use of the electric traction motors of a railroad vehicle as generators when slowing the locomotive. It is termed ''rheostatic'' if the generated electrical power is dissipated as heat in brake grid resistors, and ''regenerative'' if the power is returned to the supply line. Dynamic braking lowers the wear of friction-based braking components, and additionally regeneration can also lower energy consumption. Dynamic braking can also be used on railcars multiple units, light rail vehicles, trams and PCC streetcars. ==Principle of operation== During braking, the motor fields are connected across either the main traction generator (diesel-electric loco) or the supply (electric locomotive) and the motor armatures are connected across either the brake grids or supply line. The rolling locomotive wheels turn the motor armatures, and if the motor fields are now excited, the motors will act as generators. During dynamic braking, the traction motors, which are now acting as generators, are connected to the braking grids (large resistors), which put a large load on the electrical circuit. When a generator circuit is loaded down with resistance, it causes the generators to slow their rotation. By varying the amount of excitation in the traction motor fields and the amount of resistance imposed on the circuit by the resistor grids, the traction motors can be slowed down to a virtual stop (approximately 3-5 MPH). For permanent magnet motors, dynamic braking is easily achieved by shorting the motor terminals, thus bringing the motor to a fast abrupt stop. This method, however, dissipates all the energy as heat in the motor itself, and so cannot be used in anything other than low-power intermittent applications due to cooling limitations. It is not suitable for traction applications. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Dynamic braking (locomotive)」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.