捷運機電 - MRT Stray Current Corrosion Issues

Talked a little bit about the Stray Current Corrosion (雜散電流腐蝕) issues in the class this evening. See what we found and learned in addition from the Internet:

Stray current corrosion is a kind of electrolysis phenomena that usually occurs quietly in many places and threats the longevity and safety of metal constructions seriously.

TPC：結構物防蝕專論 - 雜散電流介紹, by 賀世中 - 

http://publish.tpc.gov.tw/Book/laborbook/no.30/a3011.pdf

• 捷運系統之雜散電流防制對策及監測結果探討 - by 顏坤鴻, 台北市政府捷運工程局第三處工程員

• Railway Stray Current Management - an engineering service provided by Intertek Group plc. (It has agents or representative offices in Taiwan, too.)

下課。

捷運機電 - Composition of the Train Disc Brake Pad

Prof. Lee questioned: What is the train's disc brake pad (disc brake lining) made of? Here are what we found on the Internet:

A train's straight air brake system diagram -
Attribution: Harpwolf at en.wikipedia.org

How does a modern train's disc brake look like? See the picture below:

Axle-mounted disc brakes on a train bogie -
Photo courtesy Eurail mag.

An example of disc brake lining compositions (semi-metallic types):

Selection of Best Formulation for Semi-Metallic Brake Friction Materials Development (experiments done for car brakes, pdf) - www.intechopen.com

As can see in the data, modern disc brake linings (a friction material) are made of composite material of partly ceramic, metallic, plastic, rubber and resin mixture. Meanwhile, the brake disc (or disc brake "rotor" in American English) is usually made of cast iron, cast steel, or carbon / ceramic composites according to the required braking performance (ref. Knorr-Bremse Brochure - Brake Discs and Pads for Railway Trains, a pdf document). The choice of the brake lining has to match the properties of the brake disc material in order to meet the maximum braking performance and longevity.

That's it.

下課。

捷運機電 CWR - Continuous Welded Rail

What is the one important feature of the High Speed Rail (Sinkansen) and KMRT's track engineering that makes the high speed train movement with comfort and silence comes possible? Let's see the track building technology for Sinkansen and KMRT systems.

Continuous Welded Rail (CWR / 長焊鋼軌) technology: (台北捷運公司的 簡簡報如下)

台灣高鐵之長焊鋼軌與溫度預力工法介紹及探討，by 蕭炎泉 / 副教授，黃志明 / 研究生，中華大學營建管理研究所。(quite detailed and conprehensive, worth a reading)

長焊鋼軌 - a ppt presentation file

JR 500v2 Streamlined Bullet Train in Himeji Stn.

下課。

捷運機電 - KMRT 電聯車 EMU

This evening Prof. Lee started to introduce the EMU (電聯車) of KMRT.

KMRT train briefly stops at the World Games Stn., southbound. Dr. Lee said, the train uses DC 750V power input, which is transformed and converted from TPC's AC 22.8kV utility power supply. Photo by Joe Lewis from Wikipedia.org

Prof. Lee encourages students to print his lecture handout on paper and bring it to the class every time. Here presents the EMU chapter online for quick look-up and download to print.

For handouts of the other chapters, please refer to the links shown in this post:

• 捷運機電 - Light Rail in Kaohsiung

下課。

捷運機電 - Light Rail in Kaohsiung

今晚上課李老師介紹的是『輕軌發展 / Light Rail Developments』之國外案例寫真，也談到了部份有關已經在營運中的二線『高雄捷運 / KMRT』的機電系統設計，並且 copy 了這學期『捷運機電』課程的講義電子檔給我們。整理如下：

上課時，老師播放了許多國外的輕軌運輸系統的寫真集給同學們看，在這裡我們也補充蒐集了親愛的高雄的『高捷環狀輕軌 / KMRT Light Rail Circular Line』的相關資料。高捷環狀輕軌的建置工程在今年一月 (January 2013) 由西班牙的 CAF 公司和台灣的長鴻營造公司所共組的團隊得標 (news)，並已經在今年六月 (June 2013) 動工興建，第一階段水岸路線預計在 June 2015 通車。

Simulation of the Landscape Bridge over Love River mouth described in KMRT's LRT RFP brief.

快來看看由得標廠商團隊 所製作的『高捷環狀輕軌』電腦動畫短片，想像一下不久的將來在我們高雄即將實現的嶄新 大眾運輸設施的美麗面貌... 影片中也有提到這個輕軌系統的機電技術規格資訊喔，跟老師講過的一樣：

這節課老師附帶提到的：

• KMRT 自動收費票證 (RFID tag) 被設定之『同站進出站時限』為 15 分鐘以內，『不同站進出站時限』為 120 分鐘以內。

老師所提供的上課講義電子檔連結如下：

• kuas_ee_2013_李國榮_捷運機電_CH1_簡介.doc (238kB)

• kuas_ee_2013_李國榮_捷運機電_CH2_電聯車.doc (15MB)

• kuas_ee_2013_李國榮_捷運機電_CH3_供電系統.doc (140kB)

• kuas_ee_2013_李國榮_捷運機電_CH4_號誌系統.doc (2.4MB)

• kuas_ee_2013_李國榮_捷運機電_CH5_通訊系統.doc (2.4MB)

• kuas_ee_2013_李國榮_捷運機電_CH6_自動收費.doc (483kB)

• kuas_ee_2013_李國榮_捷運機電_CH7_電扶梯.doc (115kB)

• kuas_ee_2013_李國榮_捷運機電_CH8_月台門.doc (229kB)

下課。

捷運機電 MRT Electromechanical - Lesson One

捷運機電 (MRT Electromechanical Systems) 這門課是由李國榮老師教授，今天第一次上課，介紹了上課的方式、內容大綱、評分標準，筆記如下。老師一再強調：輕鬆地來上課即可，這門課不會太難過，但是要請盡量每次都來上課，別太混。教科書，不用買。

KMRT train briefly stops at the World Games Stn., southbound. Dr. Lee said, the train uses DC 750V power input, which is transformed and converted from TPC's AC 22.8kV utility power supply.
Photo by Joe Lewis from Wikipedia.org

這個學期李老師準備要講授的進度如下：

• 電聯車系統
• 電力供應系統
• 號誌、信號系統
• 通信系統
• 自動收票系統
• 手扶梯、電梯系統
• 訓練系統
• 月台門系統
• 捷運機廠系統
• 水電、空調、環境控制系統

下課。

Related information:

• 李國榮 - 高雄應用科技大學 & 高苑科技大學，電機系，兼任助理教授。高雄工專電機科畢業學長。經歷：曾任高雄市政府捷運工程局九等正工程司，行政院農委會屏東農業生物技術園區籌備處簡任組長綜理園區開發工程、環保、交通等相關業務。- http://www.el.kyu.edu.tw/a2-1.asp?%C2%BE%B8%B9=T21005

• 捷運機廠之規劃設計 by 吳大川、黃國立、李國榮 - http://www.arch.net.tw/modern/month/277/277-1.htm

• Wikipedia.org: Rail transport - http://en.wikipedia.org/wiki/Rail_transport