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Monday, December 31, 2018

In Motion Charging: Part II

https://youtu.be/-OMdhZs5mok

In my previous blog about In Motion Charging, I gave a brief introduction to the subject.   I am a lazy researcher, but looking over some documents, I got a better view of the subject.   The basics are that a bunch of cities, worldwide, basically the transportation organizations, will no longer buy buses that run on carbon fuels in order to protect the environment.   The type of buses desired are battery powered, that may require recharging at some point in the day.   Thus we can see that battery powered buses are not perfect.   In fact, to get a battery to do a heavy job of transporting passengers has been under research for at least 100 years.  Some streetcars in Manhattan were light and battery powered.  I am not sure if those cars were recharged or that a new battery was slipped in.  Move forward 100 years and it seems now, that for smaller buses, on infrequent trips, the units work well but some time must be spent in recharging;  perhaps at night or at bus stops by raising a device to the re-charging pole.  But what happens for bus routes that are very busy, carry a lot of passengers and use air-conditioning and perhaps are articulated into two or three units?   It seems that for some routes, the buses cannot spend excessive time in recharging mode for economic and logistic reasons.  In the literature, IMC for trolley buses was discussed as a solution because while the bus is under the wired portion of the route, the battery can be re-charged.   It seems to me that the literature is talking about existing trolley bus systems where IMC can extend a route and cut down on recharge time.  It is not clear if the literature is talking about brand new trolley buses systems with route length extensions  that are wireless.   The question is:  Can battery buses handle summer loads with recharging down  time?   Is the trolleybus with IMC electronics considered an alternative for cities that currently do not have trolleybuses?  If these battery buses can handle crush loads with recharging time that is reasonable, the trolleybus will be in trouble.  If the only solution is IMC trolleybuses, can the world cities afford to build trolley bus systems from scratch?  How long would it take?  And as a aside, can a city with new trolleybus overhead use it  for trolley trucks (e-highway?).  I think that this would be a good investment for a city.  So far, I do not see a movement to build new trolleybus systems.

Just my opinion.
Tramway Null()

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