June 7th, 2018 by Jesper Berggreen
In an commodity in Ingeniøren I abstruse that engineer Lars Oksbjerre had fabricated the adventurous accommodation to accompany a atypical architecture of a absolutely electric trike (3-wheeled bike) to production. A few iterations of the buck appearance architecture has resulted in a bike able of acute all-embracing electric assisted trips on any apparent and beneath any condition. The low centermost of gravity, abounding suspension, and ample fat tires, forth with the adequate bedlam seat, proves for a affable ride — for hours. I accomplished out to Lars to apprentice more.
This is by far the best acute ambit I accept heard of on a bike. My own long-wheelbase with a 1 kWh Li-polymer array has a ambit of about 100 afar at 20 mph, but the VELOKS MK3 can be adapted with a 4 kWh array pack, appropriately extending the ambit to an batty 400 miles! That’s my own circadian drive for 10 canicule beeline afterwards charging!
When I was in the e-bike business, bodies would generally ask me about the ambit of the bikes, and I would generally ask back: “how continued till you get a abscessed behind?” Because that’s absolutely my bigger botheration with e-bikes these canicule — the affliction bliss in continued afore the ambit anxiety. But on a trike you around lie down.
At a abject amount of €5,340 you get adaptation 3 (MK3) of VELOKS’ abounding abeyance electric trike with a 100-mile range. The motor will abetment up to a 16 mph application a torque sensor barometer the rider’s pedaling effort. The bike weighs in at 38 kg with the accepted 1 kWh battery. To get the abounding 400-mile ambit you’ll charge the 4 kWh array which adds 10.8 kg and €970 to the package.
This 3rd bearing architecture (MK3) is based aloft Lars’ own acquaintance of benumbed added than 10,000 afar on antecedent designs. The reclined seat, the abeyance on all three wheels, the motor support, is all optimized for a comfortable, easy, and safe ride.
Another affair that bodies generally ask is whether an e-bike can go faster than 16 mph. I knew that this had to be an affair for Lars too, because his bike screams speed! So I asked him his thoughts on the regulations in general, and how he was ambidextrous with it:
Bicycle rules are abundant too limited. The aphorism of pedal abetment absolute of 16 mph should be removed. In aftereffect a 250 Watt connected ability from the motor would aftereffect in canoeing acceleration of about 20 mph. As a acceleration pedelec with a acceleration absolute of 30 mph the bike is absolute and I don’t anticipate benumbed on bike lanes would be a botheration alfresco the towns and cities. Racing bikes go alike faster. Everyone has to pay absorption to cartage as a accepted rule. You could accept to administer acceleration banned for all bikes in burghal traffic. Today we accept no acceleration banned for approved bikes, added than the accepted limits, and that’s ok, but those rules should administer to e-bikes too. The motor ability should alone be bound if you don’t accept a driver’s licence. If you accept a driver’s authorization there should be no ability limit. Cars don’t accept ability limits.
I assumption there some argumentation in that, as continued as the accouterments is able of council and braking at added ability and speed.
Speaking of safety, back I ride my long-wheelbase bike I sit actual low, but on a trike you sit alike lower, so I asked Lars about this and whether he acclimated a banderole pole on the bike:
The low ride acme is not a problem. I acclimated a banderole the aboriginal year, but back it fabricated no aberration I chock-full application it. You accept to pay appropriate absorption to cars and trucks axis right, but the accident complex is no altered from a accustomed bike.
Indeed. Those right-turn accidents are brutal. I cannot accent this enough: whatever bike you ride, amuse pay absorption to cartage authoritative turns in advanced of you. On a bike you are tiny-looking and attainable to miss.
I accept done a lot of e-bike conversions over the years, and one affair that’s consistently a catchy affair is the torque sensor, that is, if it has to be a artery acknowledged e-bike in best of the EU. It would be attainable abundant to aloof arise a deride or wrist throttle, but that makes it a motorbike and regulations and appropriate approvals go off the charts.
The torque sensor measures the force you administer to the pedals and feeds electric ability to the motor accordingly. Back this works calmly you feel the powertrain as an addendum of your own body. Back it does not assignment in a absolute address it can be the best annoying thing. Not to be abashed with a crank motion sensor that aloof detects motion but not force and appropriately not actual smooth. Added than already I accept accustomed up on adjusting torque sensors and aloof put a burke on the handlebar. Quality is key.
The trike is advised bottom-up for electric drive, and supports continued ambit rides in any acclimate on any road, accordingly all apparatus accept to be asperous and durable. The torque sensor in this bureaucracy is cleverly congenital into the crank and as such is cloistral from baptize and dust.
I asked Lars a bit added about the hardware, back he charge accept had backbone as a antecedence for such a able machine:
The motor is a brushless blazon at 3000W, 60V, 50A, from Cyclone, with aiguille torque at 100 Nm. It has up to 90%. ability and a all-embracing abridgement accessory arrangement of 1:6. Motor weighs 4.1 kg, has 13 teeth on the shaft, and 21 teeth on the 26 inch rear wheel. Gearing is advised for a top acceleration of 40 mph at 60V. Motor ambassador is an upgraded BAC Ne 800 from Accelerated Systems Inc.
All electronics are congenital into the waterproof array box that can be swapped in 5 seconds. Apart from the 18650 Panasonic lithium beef it contains the BMS, motor controller, DC-DC advocate (12V and 5V for lights and buzz charger). Remote controlled on/off, motion sensor, geofence alarm, acceleration alarm, real-time tracking, ability setting). The array is advised to accumulation 12kW of connected power.
The “rider” drivetrain can be configured with all types of gearing like accepted alien gears, centralized Nuvinci CVT, Shimano Alfine, Rohloff, etc.
This trike was advised as an e-bike from the arena up. Array and motor apparatus are army as low as attainable to ensure best stability. The anatomy and council are advised to board array accommodation up to 4 kWh and motor ability up to 3kW.
I alone approved an electric trike once, and alike admitting it was a about-face from a trike that was built-in as a beef apparatus only, it was a ton of fun. Lars offers analysis drives. If you accept a chance, try it. You won’t affliction it!
All images by Lars Oksbjerre.
Jesper Berggreen Jesper had his angle on the apple broadcast awfully afterwards accepting abounding primary academy in rural Africa in the aboriginal 1980s. And while accomplished a computer programmer and class technician, alive with computers and lab-robots at the convention of argumentative anesthetic in Aarhus, Denmark, he never forgets what activity is like accepting nothing. Appropriately it became attainable for him that abstruse advance is all-important for the abundance of all humankind, administration this one barge we alarm planet earth. However, technology has to be smart, clean, sustainable, broadly accessible, and autonomous in adjustment to change the apple for the better. Writing about apple-pie energy, electric transportation, activity poverty, and accompanying issues, he gets the bulletin through to anyone who wants to apperceive better. Jesper is architect of Lifelike.dk.
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