Showing posts with the label Electric Bike

Dawn of a new transportation age (how did this idea from 2017 pan out?)

- Oct. 5, 2017 " A Barclays’ analysis  concluded that oil demand could  be slashed by 3.5 million barrels per day worldwide in 2025. If electric vehicle penetration reaches 33 percent, oil demand could shrink by a whopping 9 million barrels per day by 2040, Barclays concluded.  Bloomberg’s New Energy Finance  puts the number at 8 million barrels by 2040, more than the “current combined production of Iran and Iraq,” they note." From PRN In business for over 100 years, the automotive industry is about to embark on a radical, convulsive transformation. The Washington Post ( ) recently pegged 2017 as the year electric vehicles (EVs) went from a promising fad to an industry-wide inevitability due to broader economic and cultural developments. Cont. Now in 2022 the oil demand is? And the adoption rate for EV cars and trucks is? And the Motorcycles(which would reduce both demand for oil and electricity) IS?The Green or Alternative Revolutions are failing as b

Sondors Metacycle: Delayed! (update)


The Verge Metacycle

"The TS is not just futuristic looks. Our 20.2 kWh battery pack is made in-house and offers 300 km of carefree riding, depending on riding style.  Using a DC charger via CCS, 15 minutes of charging will get you 100km of range, keeping you on the road for longer. Our onboard charger allows riders to fully charge in 4.5 hours. Our motorcycles are designed to be electric from the ground up. Weighing in at 247 kg, the combination of light weight materials and low centre of gravity make the TS a stable highway cruiser that can take on any country road that you throw at it." -Verge Motorcycle

Electric Motorcycle Range (1)

From Christian Vogler Engineer for concept design and performance for motorcycles "What is the maximum possible driving range of #electricmotorcycles in legislative drive cycles with a certain battery capacity? Here's the answer! And more importantly, do you agree?" I was going through the different speed profiles to test the electric range of an  #electricmotorcycle  in the EU and the USA. And what I found was quite surprising. The cycles show a nearly identical energy demand! With energy demand I mean the energy which is actually needed to propel the vehicle along the speed profile. I did not consider any drivetrain efficiencies and all braking power is considered to be recuperated. Here's the full list of assumptions: 1 - EU drive cycle is a WMTC (part 1, 2 and 3) which is continuously repeated according to EU Reg No 134/2014 2 - US drive cycle is according to SAE J2982 a continuously repeated city cycle and a constant speed test at 70 mph (113 km/h) 3 - As there

MV-QSX8000 (DPX)

MV-QSX8000 (DPX) is a modification of the MV-DPX from Wuxi Sachi Motors

15 mile loop

I've been taking measurements from various battery supplies and EV configurations for around 4 years. The goal is to get a sense of the battery performance on different platforms. It's been very informative. Each platform has its own characteristics for performance and of course uses different amounts of power over the same course of terrain. Some of the bikes reach efficiencies as low as 12 watts per mile, making a 12 AH (~420 watt/hours) battery have a theoretical range of 35 miles. Most interesting is the value of performance of a platform vs. its consumption. Course surface has a big effect on the outcome. So one can say that these applications differ greatly but are all viable for transportation when cost and performance are seriously considered.    chrg, dischrg, watts, time, miles, etc. One example of this is a 3.5 mile course with elevation change of ~900 feet can be completed by the EX1.AWFS(48volts) in 7:30 seconds with an ~speed of 27 miles/hour with a consumption un

Pedal Sensing and Torque Sensing, which is better and why...

A common usage in the bicycle manufacturing industry is that a cadence sensor determines if you are pedaling and direction (forward or backward) while a torque sensor in addition measures how hard you are pedaling. Both systems require the use of a computer to detect the pedaling and determine the signaling sent to the controller that in turn powers the motor. Often stated, toques sensing is better, is an opinion about the rider’s response to a type of  ride quality . The feel of torque sensing is a combination of responsiveness and subtle increase in power as you increase the force of pedaling. This produces a unique sensation of increased power and thus strength to the rider’s effort. Most common implementation of this on a  retrofit bike  is a bottom bracket loaded with a torque sensing crankset, available in square taper and ISIS as of this writing. Cadence and pedal detection can be done in a number of ways. On the Calfee   Electrofit  the sensing is done with a magnet ring attach

Grin Technology has a new 52 volt battery based on the new 21700 cell standard

Grin Technology has a 52 volt battery based on the 21700 cell standard. 52V (14s) 14.5 Ah downtube battery, with 40 Panasonic 21700A cells and a 40A continuous BMS, assembled in new 21700 downtube enclosure with On/Off switch and 3-pin ST charge plug. This battery can be charged up to 8A. Features include: Anderson Powerpole Connectors for Power Push Button for 4 LED Charge Indicator Installs to Waterbottle Eyelets on Downtube Mechanically Locking Key Switch ON/OFF Rocker Switch Mini ST 3-Pin Charging Port for High Charge Currents Comments on use: Using a 52 volt battery and using a 85% charge protocol has some notable advantages over using a 48 volt battery and charging it to 100%. The voltage for the 52 volt battery at 85% is 56.5volts. vs the 48 volt at 54.5 at 100% charge. As these battery discharge the voltage available drops. For a 48 volt battery that means hitting volta

Calfee Mountain Bike: Comments are open!

This is the new Calfee Design Cephal!

The barriers to marketing ebikes

The wind is not at our backs yet! The technology is inexpensive, adoption is a given.  But.....

Midrive vs Hub Motor Cont. from 2014

From 2020 EBR Forum -  Mid drives vs Hub drives ???