With electric bikes you will see specs with torque listed in metric units (newton-meters | N-m) or US units (foot-pounds | ft-lb). If the rider weighs 200 pounds and stands on the pedal, then the torque is 116 ft-lb as given by equation below: Crank arms are typically 175 mm or 7 inches long. The method used to calculate the range for an electric bike is similar to a car, which looks at how much. Torque = Force x Distance On a bicycle the rider pushes on the pedal to create Force, and the length of the crank arm is the Distance. Read our guide to increasing your eBike range. The general definition of torque is the force on an arm at a distance from the center of rotation. More torque is also very useful off road you can use it to climb over rough terrain or obstacles without the motor stalling and coming to a dead stop. This means a bike with higher torque is easier to get going from a stop, or start on an incline. Higher torque will create more acceleration and get you up steep hills easier. On an electric bicycle, torque is the ability to rotate the rear wheel.
DPC allows you to have both high acceleration and high efficiency, further extending your range. The MBB has the highest power to volume ratio of any drive system, and is combined with a patented Derivative Power Control (DPC) system. Optibike revolutionized motor drives with the introduction of its patented Motorized Bottom Bracket (MBB) system, extending electric bike range. The efficiency of the motor drive system is also integral to electric bike range, all other factors considered equal.Ī motor drive system transfers energy from the battery to the wheels propelling you forward. Our Optibike R15C has a 1500 watt-hour battery, which means it can give you roughly 1500 watts of assist for 1 hour!įor long range touring purposes, Optibike pioneered the use of Lithium-Ion batteries, with the some of the largest battery capacities available in an electric bike. This means the battery can put out roughly 370 watts for 1 hour. For example, a 37 volt battery with 10 amp-hours has an energy capacity of 370 watt-hours.
Battery CapacityĮnergy capacity of a battery is measured in watt-hours (Wh) and is a product of volts times amp-hours. If factors 1 to 5 are identical, then range is solely a function of the energy capacity of the battery and the efficiency of the motor drive system. The energy capacity of the battery (measured in Watt Hours or Wh)
However, the frequency of charging an e-bike battery rely on many factors, such as the type of battery, the level of usage, and the type of ride. The combined aerodynamic drag of the rider and bike Diane Guimond To maintain the health and longevity of an electric bike battery, it is generally recommended to charge it after every ride. Range is determined primarily by 6 factors When we speak of range we are collectively referring to how far an electric bicycle will travel before the battery runs out of energy. What is the True Range of an E-Bike? The actual range of an Electric Bike is not always what is advertised NEW | Argon 37lb E-Bike | Ready to Ship.NEW | R22 Everest Dual Battery Adventure E-Bike."Approximate range in miles for typical 175-lb rider, using Pedal Assist Level (PAS) 1, on dry, flat, and paved roads, with tires properly inflated and no headwinds. If you dispute the calculations please show your own calculations using the rider in the example: This will give you a more accurate range. Some of these are the desired grade of assistance from the electric motor, the distance profile and the weight of cyclist and bike. The range can't be calculated exactly, it depends on many different and uncertain factors. The numbers the bike dealer gives are generally under best lab conditions and not realistic. Calculate an estimation for the range of an e-bike. This is just a quick calculator to get an approximate range if you are looking at a bike to buy. Watt Hours of Battery / Energy Use = Approximate Miles in range.ĩ60 Wh / 20 Wh = 48 miles in range approximately.Īpproximate range in miles for typical 175-lb rider, using Pedal Assist Level (PAS) 1, on dry, flat, and paved roads, with tires properly inflated and no headwinds. The more you peddle the less the Wh the ebike has to produce to maintain that speed. So if your average speed will be 20 miles per hour you will be using approximately 20 Wh of energy.
On average, it's been estimated that the average ebike battery will yield one (1) mile of travel for every 20 Wh of energy. The higher the capacity, the longer the range or distance that can be travelled on a. The calculation is pretty simple to remember: eBike range is determined by the capacity of the battery (Watt-Hours). Therefore a 360 watt hour pack will get you about 18 miles. If you are nitty with your energy usage, each mile you travel will cost you about 20 watt hours. A 36-volt 10-Ah battery pack has 360 watt hours (36 X 10 360). Thought this might help as I see quite a few people asking about range of ebikes. To calculate the watt hours (WH) of a battery pack, simply multiply the voltage by the amp hours (Ah) of the pack.
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