Duke Eco-Marathon Team using an Electric Bike Technologies hub motor for the 2014 Shell Eco-marathon. The E-BikeKit motor provides optimal space saving because it does not require a chain (this makes it great for converting road bicycles to electric bicycles, which is what it is designed to do) but we hope to determine if it provides us with a better overall vehicle efficiency than our outboard motor.
Electric bikes are a green alternative to driving a vehicle. Studies carried out in several towns and cities show that the average car speed in rush hour traffic can dip as low as 18 to 20 mph. Electric bike speed can be as high as 15 mph. With an electric bike, you can reduce pollution, improve fitness, and still arrive at the same time as your car-bound colleagues.
Compared to the torque sensor system, the cadence sensor will just provide the assist based purely on the level assist you have selected and it will not increase or decrease the assist based on your actual pedal power. You could be pedaling very lightly or very hard and it will provide the same level of assist.
Rear Motor: 250W. High Quality With Competitive Piece Can Be Realized Here! Range per charge 25-35km with pedal assist. Battery: 36V8AH lithium battery. Range per charge: 25-35km with pedal assist. Max loading: 350lbs.
As a power electronics engineer I had intended designing and developing a torque assist bike so was surprised to find that a few manufacturers brought them out in Europe recently. I bought a Raleigh Vélo Cité with a 36V 10Ahr lithium battery. I would never use a throttle or cadence type unless I was infirm and I am sure that torque sensing pedelecs will become the norm as prices fall.
“Yamaha is a well-known and respected brand, but the market is already pretty saturated with manufacturers,” Flagg said. “This is a very competitive space. The opportunity for a manufacturer to have a huge impact has probably passed.”
Think I care if I push laws boundries? Nope, I will suffer the consequences if they catch me having fun. The law can’t keep up with the times, we can build bikes faster than they can ‘debate’. As soon as I found E-biking, I drive car 1/4 so Gassing every week to a month of what I used too. And I realized cars are not fun to work on, when you have a two wheeled beauty to tinker with.
Lower the voltage. Depending on the battery, the first block or two of riding might do the trick. If your battery drops voltage fast, you might be a lot slower than 20-MPH for 98% of your ride. I’d call that close enough if that is the case. Or maybe I can just charge my battery to a lower voltage. Maybe if I charge it to 40 volts instead of the normal 42V-44V, I won’t be quite so fast. That could work if my battery still gets me going 23-MPH for too long to fudge it.
Riding my Stromer on Minneapolis bike trails for the past month has been a blast. And, nobody has a clue what I’m riding. Of course, I’m careful to call “on your left” with every high speed pass. But, I’m dreading the possibility of “no motor-assist bicycles” signs going up once people do figure out what’s going on.
Controllers for brushless motors: E-bikes require high initial torque and therefore models that use brushless motors typically have Hall sensor commutation for speed and angle measurement. An electronic controller provides assistance as a function of the sensor inputs, the vehicle speed and the required force. The controllers generally allow input by means of potentiometer or Hall Effect twist grip (or thumb-operated lever throttle), closed-loop speed control for precise speed regulation, protection logic for over-voltage, over-current and thermal protection. Bikes with a pedal assist function typically have a disc on the crank shaft featuring a ring of magnets coupled with a Hall sensor giving rise to a series of pulses, the frequency of which is proportional to pedaling speed. The controller uses pulse width modulation to regulate the power to the motor. Sometimes support is provided for regenerative braking but infrequent braking and the low mass of bicycles limits recovered energy. An implementation is described in an application note for a 200 W, 24 V Brushless DC (BLDC) motor.
Around 90% of electric bikes are powered by standard lithium-ion batteries, but there have been further developments in the technology. These developments include lithium-ion polymer batteries, lithium manganese batteries, and lithium cobalt batteries.
If you’re completely new to ebikes, check out this short video overview and e-book guide that’s free on Amazon if you’ve got Prime. It’s full of pictures and examples to get you acclimated to the space. I’ve also done an in depth video interview about ebikes with my uncle since he has been riding one to work every day for over a year now.
The environmental effects involved in recharging the batteries can of course be reduced. The small size of the battery pack on an e-bike, relative to the larger pack used in an electric car, makes them very good candidates for charging via solar power or other renewable energy resources. Sanyo capitalized on this benefit when it set up “solar parking lots,” in which e-bike riders can charge their vehicles while parked under photovoltaic panels.
The Townie® Commute offers the comfort and control of the best-selling Townie with standard upgrades that will allow you to go the distance in comfort and style. If you’re thinking about getting around on two wheels more often, this is the bike for you.
Baby boomers are an obvious market for electric bicycles. “We’re seeing an aging population, and a growing number of people getting back into cycling,” says Bill Moore, an Internet publisher who recently launched ePEDALER, an electric-assist bicycle retailer. Urbanization will be another driver of electric bike sales, Moore said, as will the obesity crisis, rising health care costs, and the desires of employers to encourage their workers to become more active.
More powerful pedelecs which are not legally classed as bicycles are dubbed S-Pedelecs (short for Schnell-Pedelecs, i.e. Speedy-Pedelecs) in Germany. These have a motor more powerful than 250 watts and less limited, or unlimited, pedal-assist, i.e. the motor does not stop assisting the rider once 25 km/h has been reached. S-Pedelec class e-bikes are therefore usually classified as mopeds or motorcycles rather than as bicycles and therefore may (depending on the jurisdiction) need to be registered and insured, the rider may need some sort of driver’s license (either car or motorcycle) and motorcycle helmets may have to be worn.
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^ Jump up to: a b c Chi-Jen Yang (2010). “Launching strategy for electric vehicles: Lessons from China and Taiwan” (PDF). Technological Forecasting and Social Change (77): 831–834. Archived from the original (PDF) on 2010-03-31.
$Electric Bike-Power Bike Eco-Friendly Battery and charger are included Single Speed Electric Bike — Proudly assembled in U.S.A —AGM (Absorbed Glass Mat) Non-Spillable Sealed Lead Acid Batteries —20 MPH, 28 Miles per full charge —Three riding modes: Electric mode, Electric with pedal, Pedal only Specifications: Motor: 250W, 24V Brushless Battery: AGM SLA battery 24V / 12AH Controller: Speed sensor 24V Display: Battery capacity Max Speed: Up to 20 MPH (rider weight contingent) Gear Set: Single speed Brakes: F: V-Brake R:DRUM Tires: 24″ X 1.95 W with reflector Rims: 24″ Alloy double Wall Handlebar Stem:Aluminium handlebar and stem Front Fork: Rigid steel fork Seat: Wide leather, steel seat post Frame: Steel frame size – 24″ x 18″ Pedals: Plastic with reflectors Crank Set: Steel crank sets Net weight 75lbs.
The situation in New York State is not as bleak as you imply. New York State has yet to define what an electric bike is, so in the meantime the federal definition applies (an ebike goes less than 20mph, with less than 750 watts of power). The federal definition says that any bicycle within these specifications is not a “motor vehicle” or a “motorized vehicle” or a “motorized bicycle”; it is essentially a bicycle. Only state laws for bicycles apply. This makes sense: the intent of the federal law was to define a reasonable speed and power for ebikes that isn’t significantly different from human power. We’re talking about a vehicle that by definition is not capable of behaving significantly differently than a human-powered bicycle, so it should have the same benefits and restrictions as a human-powered bicycle. States like New York State that simply don’t define ebikes don’t have a basis for restricting them, except by referring to the federal law. It may be that this very clear idea needs to be tested in court, or it may be that Albany comes to its senses and passes a legal definition of ebikes similar to the Federal definition.
Ebikes that look like motorcycles (such as Vespa style scooters with pedals) WILL get you pulled over. If it looks like it needs registration and tags…a cop will assume you are riding it illegally without them:
Free to Roam the Road: According to California state law, any pedal-driven e-bike with a max speed of 20 mph can use any of the state’s bike lanes, bike paths, bike trails or off-street bikeways. (E-bikes are still pretty new, so in many areas, the CA law is the accepted standard in absence of local regulations.)
China’s experience, as the leading e-bike world market, has raised concerns about road traffic safety and several cities have considered banning them from bicycle lanes. As the number of e-bikes increased and more powerful motors are used, capable of reaching up to 30 miles per hour (48 km/h), the number of traffic accidents have risen significantly in China. E-bike are more likely than a car driver to be killed or injured in a collision, and because e-bikers use conventional bicycle lanes they mix with slower-moving bicycles and pedestrians, increasing the risk of traffic collisions.
They’re Kind of a Bargain: E-bikes are less expensive than you might think—in fact, you can buy one new for under $1,000. (They vary greatly in technology, design and price, however, so be sure to read reviews and try a few models out in person before you hand over your credit card; it’s important to know what you’re getting—and not getting—for your money.)
“It’s happening in every major city, and a lot of secondary cities around the country, and it’s causing people to think differently about getting around on two wheels,” says Pizzi. “If you don’t have safe infrastructure, people don’t feel as if biking is safe and secure.”
Disclaimer. This article is not written by a lawyer, and in no way constitutes legal advice. This article is intended only as a guide to how to look up information that will allow an individual to understand their local laws pertaining to operation of electric bikes. This story was submitted by non-lawyer Dogman, our electric bike commuting guru, and electricbike.com staff writer.
Today, China is the world’s leading producer of e-bikes. According to the data of the China Bicycle Association, a government-chartered industry group, in 2004 China’s manufacturers sold 7.5 million e-bikes nationwide, which was almost twice the year 2003 sales; domestic sales reached 10 million in 2005, and 16 to 18 million in 2006.
E-bikes are zero-emissions vehicles, as they emit no combustion by-products. However, the environmental effects of electricity generation and power distribution and of manufacturing and disposing of (limited life) high storage density batteries must be taken into account. Even with these issues considered, e-bikes are claimed to have a significantly lower environmental impact than conventional automobiles, and are generally seen as environmentally desirable in an urban environment.
For some, only the best will do. The next generation of e-bike battery packs is now here with a massive 52 Volts. This higher voltage pack adds more speed and more torque than you ever thought possible from the geared hub motor. The RipCurrent S is the first production fat bike to fully take advantage of the new 52V standard.
The time or distance an electric bike battery will run between chargings is impossible to judge with much accuracy. There are too many variables: terrain, speed, rider weight, bike load (shopping, kids, luggage), and more. However, we can make a few generalizations about an e-bike’s recharge time and overall working life. These generalizations should be used for comparison purposes only.
A lightweight, high speed, electric road bike with sturdy 12 mm thru-axle on the front wheel, Carbon fiber fork, and Alpha 200 Gold alloy frame to dampen vibration. Capable and comfortable on hard packed trails as a gravel grinder, sturdy Aluminum fenders and……
This past July 1st we moved our location to Croydon, PA and doubled our space. Additionally we’re looking to hire at least 2 additional employees! This is all to support our expanding conversion kit business and to support some new business we have planned starting in September (more to come on that soon). We would like to thank every single one of our customers, partners, associates and fans for your…