Generator & Chain Drive System (GCD)
Many electric bikes are really just electric scooters with pedals attached to exploit ebike standards as a loophole. Not the Electrom, it is designed to be pedalled. The Electrom uses a unique Generator & Chain Drive System (GCD). The GCD acts like an automatic transmission for a bike.
How it works:
The rider’s energy is split and goes via two separate drive chains to both an on-board generator as well as to the back hub motor with one very low gear. The rider can help the motor get the vehicle up to speed and to climb steep hills with direct pedal energy, but at speeds over 15 kilometers per hour, the chain drive is freewheeling and the rider’s energy is going solely into the generator.
Benefits of the GCD system:
No Gears – It allows the rider to pedal all the time at a constant effort without the need to shift gears to match the human energy to the speed the vehicle is traveling. This is especially advantageous in stop-and-go city situations.
High quality exercise – Because the rider’s efforts are independent from the speed of the vehicle, they can pedal all the time against a constant resistance, even when going down steep hills or slowing down. This makes for a superior quality of exercise. The Electrom pedalling station is mounted high enough off the ground that there is no possibility of pedal-strike on tight corners which adds to the time one can spend pedalling.
Choose your effort – Because the rider can pedal as little or as much as they want, they have the choice of working hard and sweating, or pedalling at a gentle pace with efforts similar to walking. This is a nice feature if one is on their way to work in an office situation.
Track power output – The human power generated by the GCD system is routed through a shunt and displayed in watts on the Grin Cycle Analyst V3 display.
Low maintenance – While the GCD may sound complex, the mechanisms that make it work are quite simple and time-tested. Because the drivetrain is under very little stain it does not stretch or wear out like a conventional bicycle drive-train and requires very little maintenance.