Editing Dynamic braking (section)

==Blended braking==
[[File:New Connex EMU`.png|thumb|right|175px|A [[Connex South Eastern]] [[British Rail Class 466|Class 466]] [[Electric multiple unit|EMU]] at London [[Blackfriars station]] in 2006, which has been fitted with dynamic blended braking]]

Dynamic braking alone is not enough to stop a locomotive, because its braking effect rapidly diminishes below about {{convert|10|to|12|mph|0}}. Therefore, it is always used in conjunction with another form of braking, such as an [[air brake (rail)|air brake]]. The use of both braking systems at the same time is called '''blended braking'''. [[Li-ion]] batteries have also been used to store energy for use in bringing trains to a complete halt.<ref name=rgi>{{cite news|title=Wayside and on-board storage can capture more regenerated energy|url=http://www.railwaygazette.com/news/single-view/view//wayside-and-on-board-storage-can-capture-more-regenerated-energy.html|work=[[Railway Gazette International]]|date=2007-07-02|author=Professor Satoru Sone, Kogakuin University|archive-date=10 July 2018|archive-url=https://web.archive.org/web/20180710141424/http://www.railwaygazette.com:80/news/single-view/view/wayside-and-on-board-storage-can-capture-more-regenerated-energy.html|access-date=29 August 2021|url-status=live}}</ref>

Although blended braking combines both dynamic and air braking, the resulting braking force is designed to be the same as the air brakes on their own provide. This is achieved by maximizing the dynamic brake portion, and automatically regulating the air brake portion, because the main purpose of dynamic braking is to reduce the amount of air braking required. That conserves air and minimizes the risks of over-heated wheels. One locomotive manufacturer, [[Electro-Motive Diesel]] (EMD), estimates that dynamic braking provides between 50% and 70% of the braking force during blended braking.