Archive for the ‘E-BikeKit Blog’ Category

E-bike v. the Volt on the quarter mile

Sunday, May 6th, 2012

E-bike v. the Volt on the quarter mile


(Odometer: 20,147)

TEMPE, Ariz.–In the red Chevy Volt–our innovation “magic carpet” around the country–we’ve drag raced a Prius. Here at Arizona State University’s main campus, we got a chance to take it up a notch.

Brian Jackson, an engineering student here, commutes around campus on an electric bike. The prices of these feats of engineering are coming down into the high hundreds of dollars, which makes them competitive with high-end traditional, people-powered bikes. (Yes, they may defeat the exercise purpose of a bike, but Jackson’s lean and fit, so he’s doing something right).

He offered us a chance to ride it around and we took him up on that:

About Brian

Editorial Director for EE Times’ EE Life engineering community. Baseball fan and road trip guy for the next several months. View all posts by Brian →

For Jeff Bernards, e-assist saved cycling

Friday, May 4th, 2012

For Jeff Bernards, e-assist saved cycling

Originally posted by Jonathan Maus (Publisher/Editor) at www.bikeportland.org on May 3rd, 2012 at 12:31 pm

Jeff Bernards new e-bike-7

Thanks to battery power, Jeff Bernards is cycling again.
(Photos © J. Maus/BikePortland)

Chronic foot pain threatened to make cycling unbearable for 56-year old southeast Portland resident Jeff Bernards. Now, after installing an electric-assist kit on his bike, he’s riding again. And loving it.

Bernards is a veteran of local bike events. Years ago he started the “Get Lit” program to give out free bike lights to those in need (the program has since been taken over by the Community Cycling Center). He also loves leading bike tours. He’s taken a group of Portlanders on a three week bike tour in Death Valley, California and he’s led numerous overnight bike trips to Oxbow Park. More recently, Bernards has worked tirelessly to get a ban on studded tires on the Oregon ballot.

This man never quits, and his feet have paid the price.

Jeff Bernards new e-bike-3

Then about six years ago, while leading a bike tour around Mt. Hood, Bernards suffered an overuse injury on his foot due to some awkward pedaling on a long climb. He was later diagnosed with plantar fasciitis. The pain subsided for years, he says, but when his studded tire ban effort ratcheted up, he found himself walking all over town gathering petition signatures.

Jeff Bernards new e-bike-6

“When we got the Studded Tire Initiative signature sheets I hit the streets hard, too hard,” Bernards shared.

All that walking re-ignited his plantar fasciitis. Walking has been painful for him since December and since then he’s been driving almost everywhere. “I basically haven’t bike for four months.”

Bernards had never ridden an e-bike until a recent trip to Paris, where he rented one on a whim from a bike shop to visit the sites. He loved being able to keep up with auto traffic. In what he calls “the most dangerous city” he’s ever biked in, the power of the e-bike made him feel, “a little less vulnerable.”

When he returned to Portland, Bernards did some research on e-assist kits and ended up at The eBike Store in north Portland. With the help of e-bike expert and owner of The eBike Store, Wake Gregg, Bernards ended up purchasing a 350 watt, geared front-hub motor kit from a company called eBikeKit.

Bernards decided to upgrade to a 48 volt, 20 amp hour battery to go with the motor and he had a custom battery case made. The battery was about $700; but it’s good for 3,000 charges and Gregg says it will get about 30 miles each charge. Bernards figures he spent about $1,200 total on the system.

Jeff Bernards new e-bike-2
Jeff Bernards new e-bike-1

He picked up the bike last week and, judging from his smile and his first impressions, it was worth every penny.

“I went to the hardware store last night and filled my panniers with stuff,” Bernards told me via email yesterday, “Then I hauled it home, without the car, which I would have taken before I had the new e-bike.”

With its powerful battery, the bike really has some pick up (I gave it a whirl myself through the streets of Old Town last week and it was quite a thrill). Bernards sees it as “an affordable electric car,” especially when he attaches his trailer for extra cargo capacity.

And for those purists who still look down on electric-assisted bikes; Bernards says, “Hey, we’re all getting older. Last year at this time, I just finished riding 700 miles from Death Valley to San Diego. Less than a year later, I could hardly walk.”

— Is that thing legal? I thought you might ask. Read our post from August 2010, E-bikes, the law and you for more on the legality of e-bikes.

The Basics of an Electric Bike Motor!

Monday, June 20th, 2011

Whether you are interested in purchasing an ebike or you’re looking into starting from scratch in order to create your very own customized electric bicycle, you will definitely need to know the basics of the electric bike motor.

There are two main types of electric bike motors, each with their own set of features and functions.

The hub motor:
• The motor is compact in size to fit into the wheel.
• Most hub motors provide great efficiency with relatively low noise.
• Many of the leading companies offer custom-made hub electric bike motors to fit the needs of the consumer.
• Initially, you have to set up the built-in programmer.
• The best models offer cruise control.
• The weight can range from 5-15kg, which is a lot.
• The power ranges from 250-1000 Watts depending on the hub motor regulations for the area.
• The price ranges from a $100 to as much as $500.
• It is extremely energy efficient with minimum loss of energy and the total cost of maintenance is surprisingly low.
• Generally, you have to modify the wheel to make room for the electric bike motor.

The brushless motor:
• The electric bike motor has electronic functioning.
• It is environmentally safe.
• The motor works with a DC current.
• Generally, a brushless motor has an integrated gearbox, which significantly increases the amount of motor torque.
• High speed cruising with this motor is a highly enjoyable experience.

If you intend on buying an e bike kit then it will come with one of these motors and probably a choice between wide ranges of power. E bike kits are easier to install for a first time user and a person with limited knowledge of machinery. However, if you want to construct an entire electric bike from scratch, then you should pay special attention to the electric bike motor specifications to select the kind that would fit your lifestyle.

Easy Maintenance Procedures for Your Electric Bicycle

Monday, June 20th, 2011

Keeping your electric bicycle well maintained and smoothly running is easier than you think. Some of these basic procedures are ones that you would use in a regular bike as well but practicing them regularly will add life to your electric bicycle and save you from a lot of trouble later on. Like any machine, simple maintenance procedures will help you get the most out of your electric bicycle and save you from extra expense in the future.

• Keep the motor clean to maintain its efficiency and prolong its life.
• When cleaning the bike avoid getting too much water into the motor. Like any motor, excessive contact with water can affect it.
• Even if you do clean the bike with water, be sure to wipe it dry to prevent rusting.
• Never leave your electric bike close to a heat source or under bright sunlight. It might damage the electric components.
• Keep your batteries charged and clean.
• Do not attempt to open up the motor, charger or other components. You might damage some of the delicate parts.
• Keep all of the mobile parts of the electric bicycle well oiled and lubricated.
• Check the brakes every few weeks to ensure that they are working properly.
• Check tires for damage and inflate them on a regular basis.
• If you are using your electric bicycle in a difficult terrain, you might need to replace some of the parts occasionally. Always buy quality components that will give you better performance and last you longer.
• If there is a problem with your electric bicycle, contact a repair shop instead of trying to fix it on your own. You might make matters worse.

If you follow these simple procedures, you’re going to get the most out of your bike and in the bargain, a vehicle that’s going to last you a lifetime.

Cars Vs Motorized bikes

Sunday, June 19th, 2011

The dispute between cars and motorized bikes is very authentic nowadays. People always say that having an electric bike is far better than having a car. Here are three reasons why you should choose the electric bike over a car.

First of all, motorized bikes have an electric engine fueled by a battery. The charging of this battery can be done in two ways:
• either by the friction created when you pedal – this means the battery gets charged while you ride your bike; this is an inexhaustible power source
• or by plugging the battery into a wall socket and allowing it to draw power from there; this is more time consuming, as you will need to allow the battery to recharge for at least 8 hours. Also, the battery will last for only a few miles. After that, you will be left to pedal on your own and your speed will significantly decrease.

Either way, fueling your bike is cheaper than fueling your car. Electricity costs significantly less than gas.

Secondly, motorized bikes have a brushless engine. This means that instead of the mechanical brushes usually found in a motor there are several chips and other electronic parts that ensure the functioning of the engine. Those electronic parts do not need to be checked out periodically. This means that a motorized bike doesn’t require service. That is not the case with the car. Most of the time, car parts need to be replaced.

In the third place, electronic bikes cause no pollution. Actually, they are 18 times less pollutant than an SUV, according to a recent study. If you care about the environment, this argument should convince you to replace your car with a motorized bike.

There are many more advantages to owning a motorized bike rather than having a car. So maybe it is time for you to swap your car with such a bicycle.

Electric Bicycle: An Economic Mode Of Traveling

Sunday, June 19th, 2011

Nature has got a lot of hidden treasures that can be explored and to reach the most remote nooks and corners a bike is very essential. Experiencing the joy of ride on high mountains will give you an adrenaline thrill. Moreover, the experience of riding bicycle can further be enhanced by using electric bicycles which will give you abundant energy.

Eco Friendly Battery:
With the rise in pollution due to emissions by vehicles and the high fuel consumption, it has become necessary to come up with a technology which is eco friendly and electric bicycle is one of the many examples of conserving energy. The primary source of these bicycles is the LiFePO4 batteries which leaves no stone unturned in providing maximum performance. This battery is rechargeable and makes use of LiFePO4 as cathode. Not only does this battery provide good electrochemical performance but it also offers excellent thermal stability. Moreover, it can be easily mounted onto the bicycle as it is very light in weight.

Easy Installation:
The DIY kit allows you to transform any ordinary bicycle into an electric bicycle in a short time. It is very easy to use and can be fitted inside your home too. The front and rear gears of the bicycle are connected using the kit which helps the bicycle in attaining speeds up to 50 mph. It is just perfect for riding through the hills. Also, with the battery being rechargeable, you can ride to a long distance on a single charge without any sort of interruption.

Using electric bicycle is one of the best ways of caring for the nature. Not only does it provide renewable source of energy, it also helps in keeping the environment free from harmful emissions. It is a perfect mode of transport for those who believe in restoring the balance of the nature.

Going green with Motorized Bike

Sunday, June 19th, 2011

There is no denying that motorized bikes are one of the best ways of traveling without polluting the environment; think “fresh air” and you’ll see why electric bikes are the saner choice. A motorized bike consists of an electrical system that can be easily implemented to the bicycle in virtually no time without any difficulties. The main components of the motorized bike are a motor which helps in rotating the output shaft, a battery which powers the motor and an indicator.

Early versions of Motorized Bikes:
Early design of motorized bike consisted of gear or chain technologies which drove with the help of a motor and which were permanently attached to the bike’s drive sprocket and its pedals. Although the motorized bike was powered by a secondary source, it did seem to have a major drawback. The drive system and motor were in contact all the time thus requiring the rider to pedal with the motor. However, the use of motor provided great power to the bicycle and with further modification, it became possible to come up with technologies that could be easily incorporated with the bike without requiring the rider to pedal all the time.

Factors to be considered before buying:
If you have decided to buy a motorized bike, there are many factors to be considered before buying one. First of all, you need to look out for the restrictions in your state. Since the laws for riding motorized bike vary from one state to another, it becomes mandatory to be aware of the state’s laws you are living in. Electric motors are not expensive and require lesser maintenance unlike other gas motorized vehicles. Moreover, you will reach your destination faster than traveling by ordinary bikes.

Where to Buy One?
If you live in a metropolitan city, you will have no trouble in finding a suitable motorized bike.
You will find many dealers of bikes and scooters who will be selling a wide range of motorized bikes. If at all you are unable to find a suitable bike, the internet will always be at your rescue. Not only will you find readymade bikes but you will also find DIY kits with which you can transform your ordinary bike into a motorized one.

Choosing a frame for electric motorcycle!

Thursday, June 16th, 2011

When building an electric motorcycle, people don’t care much about the frame they use to build the bike. Usually, they make use of any old bike lying around or buy a cheap electric motorcycle from a departmental store. This is alright if you want to build a low power electric bike but if you want a faster and powerful bike than the average ebikes you need to choose your frame for electric motorcycle carefully.

Choosing the Right Angle of the Frame:

The head angle of the frame affects the handling of the bike
• A steep head angle (close to 90 degrees) will cause the bike to become unstable while riding at high speed.

• Stability will be more when the head angle will be slacker (close to 0 degrees), however, it will lose stability when taking slow tight turns. A slacker head angle will lengthen the wheelbase of the motorcycle thus improving high speed handling.

• A downhill or freeride type motorcycle will have a head angle that range between 64 and 69 degrees depending on the usage of the electric motorcycle. You can check the head angle (opt for 66 to 68 degrees) of any frame for electric motorcycle in the frame geometry of the manufacturer’s website.

Going for the Best Option:

There are many online websites which provide good deals on used electric motorcycles and its parts thus saving you oodles of money that can be utilized for buying other things. You can opt to buy a full suspension frame for electric motorcycle which will provide you with a smoother ride and give you additional space for batteries. If you wish to have maximum range for your electric motorcycle, you can go for a hardtail frame that has no rear suspension thus giving you lot of room to mount multiple batteries.

Choosing a suspension fork for electric motorcycle

Thursday, June 16th, 2011

Suspension fork for electric motorcycle is an essential part of the motorcycle and when choosing one, you need to ensure that you buy the suspension fork of the recommended length in order to match with the frame of the bicycle. If you buy a complete ebike, the suspension fork that that comes along will already go well with the bike.

Choosing the right fork:

A suspension fork that is too tall will cause the frame to change the handling features of the bicycle and will add excess strain on the head tube exceeding its capability to handle stress. This can result in the cracking of the frame due to excess stress. It can also raise the bike’s stand over height thus making the bike too high for you to comfortably sit on. A short suspension fork will lower the front end of the bike which will drastically increase the head angle thus causing you difficulty in handling the bike.

Choosing the right size:

Some suspension forks come with an adjustable travel which helps you set the correct height for the frame, however, they are more expensive and are not essential for an electric bicycle. Just go for the suspension fork for electric motorcycle of the same height that the frame was designed for.

You can check the frame manufacturer’s site in order to see their recommendation for the fork size for the frame that you have. The suspension forks can have an air spring which can be adjusted with the help of shock pump to adjust the air pressure inside the suspension fork. A suspension fork with a coil spring may require the change of the internal coil spring to another one that will match the weight of the newly finished bike.

Choosing the fork according to Durability:

Suspension forks are available with varying diameter stanchions that range from 32mm up to 40mm. The bigger stanchions are recommended since they provide stiffness to the fork thus preventing the suspension fork from bending while applying the front brake.

The electric motorcycle becomes heavy after installation of the components and hence a very tough fork that is capable of handling a big 8-inch brake rotor is recommended. You can opt for a 20mm through axle, which is usually available with heavy duty forks. This type of suspension fork for electric motorcycle will provide additional stiffness thus providing extra durability to the ebike.

Electric bike motors: types and models

Friday, June 10th, 2011

If you are sick of gridlocks and being late to work every day or having to leave too early in the morning in order to arrive at your destination in time then you should definitely switch to a more reliable and efficient means of transportation: an electric bike.

When searching for the right electric bike, your first step should be to pay attention to the motor. Electric bike motors provide various amounts of power and have different designs. The most reliable electric bike motors are:

• The hub motor
• The brushless motor or the BLDC motor

The hub motor is a type of electric motor that is incorporated in the wheel. It is placed in a hub inside the wheel, operating it directly. This is more energy efficient than any other motor, because there is no power loss. Hub motors can also be found on cars and a few other vehicles.

The brushless motor, also known as the brushless DC or BLDC motor, is an electronically commuted motor powered by direct current only. All systems are electronic rather than mechanical; therefore you can consider this motor to be extremely environmental friendly. This non pollutant motor is ideal for an electronic bike, but that is not the only device it runs. Such a motor, at a much smaller scale, of course, can be found on computer hard drives and CD players. BLDC motors also power small cooling fans on computers.

Electric bike motors are the very heart of the system your ebike will run on, so be careful when choosing. Also, pay extra care to the amount of power the motor will provide. Basically, if you want to run with more than 12 mph, you will get a stronger motor. Sometimes, the amount of power a motor provides is regulated by law.