My Motocicletta: MV-QSX8000 (DPX) update
MV-QSX8000 (DPX) is a modification of the MV-DPX from Wuxi Sachi Motors
Posts
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 u...
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 w...