| JosephKIC | Дата: Пятница, 25.03.2016, 20:31 | Сообщение # 1 |
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Статус:  | If you are thinking about purchasing or building your own electric bike you will want to coach yourself a bit on different technical terms in order to make an educated decision when purchasing batteries for your bike.
One term that may appear is watt hours or Wh for short. A Watt Hours is an important measurement when determining just how much battery capacity you need to search a nominated distance. It represents the whole energy for sale in a given battery power. It is calculated by multiplying the amp hour or Ah of a battery pack by the total voltage from the pack. A 36-volt 20Ah pack along with a 72-volt 10Ah pack both contain 720 watt-hrs; therefore they should both be able to get you the same distance provided you ride at the same speed. With the 72v pack you'll be able to accelerate faster and also have a greater top speed compared to the 36v pack. If you take good thing about this (it is certainly hard to never make use of all that extra power) and ride in a quicker you will confront more wind resistance depleting more power. This will lead to your distance traveled ahead of the batteries used up being under that in the 36v pack traveling at a lower speed however you will reach your destination faster. With a Crystalyte 5304 hub motor in a very 24-inch rim and a motor controller set to 90 amps you may average around 35 to 45 watt-hrs per km (58-75 watt-hrs per mile). This is in a cruising speed of around 65KPH (40MPH) and no pedaling. How fast you accelerate and your top speed will influence your power consumption. It will also vary depending on how flat or hilly the terrain is and how much weight you are carrying. You can use under 25 watt-hrs per KM in the event you ride really slowly (using the same setup stated earlier) on flat terrain or use over 65 watt-hrs per KM riding full throttle up hills.
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