Serial Hybrid Drive in Bike S. Braune, K.-D. Kramer, Harz Universtity, Institut of automation and computer science GmbH (IAI) Wernigerode, Germany Research Project 1ST LIGHT ELECTRIC VEHICLE SUMMIT - BARCELONA, 20-21.9.2016 1
Chainless Bike Main idea Bicycle without mechanical coupling between pedal and rear (chainless) Advantages No mechanical gearshift Electronic gear shift is possible Basic requirements Performance at least as a conventional bicycle (with less effort) Pedelec auxiliary motor becomes the main drive Quality of riding pleasure of a conventional bicycle must be preserved Recuperation must be possible 1ST LIGHT ELECTRIC VEHICLE SUMMIT - BARCELONA, 20-21.9.2016 2
Almost all e-bikes on the market are designed as parallel hybrid drive Parallel Hybrid Drive Battery M Motor Chain Pedal Drive Wheel Quelle: ebike-base.de Quelle: speed-you-ebike.de Quelle: Kalkhoff 1ST LIGHT ELECTRIC VEHICLE SUMMIT - BARCELONA, 20-21.9.2016 3
Serial Hybrid Drive not required : chainring chain / transmission belt chain guard chain circuit gear lever torque sensor additional: generator / inverter auxiliary motor becomes the main drive maintenance-free Principle of the serial hybrid drive: G 3~ ~ = = ~ M 3~ Pedal Generator Inverter Inverter Motor Drive wheel Battery 1ST LIGHT ELECTRIC VEHICLE SUMMIT - BARCELONA, 20-21.9.2016 4
Serial Hybrid Drive not required : chainring chain / transmission belt chain guard chain circuit gear lever torque sensor additional: generator / inverter auxiliary motor becomes the main drive maintenance-free Why does this drive system has not been enforced? Principle of the serial hybrid drive: G 3~ ~ = = M ~ 3~ Pedal Generator Inverter Inverter Motor Drive wheel Ride feeling of a conventional bicycle must not be lost! Battery 1ST LIGHT ELECTRIC VEHICLE SUMMIT - BARCELONA, 20-21.9.2016 5
Chainless Bicycle 25 km/h First Evaluation Model Sponsored by 1ST LIGHT ELECTRIC VEHICLE SUMMIT - BARCELONA, 20-21.9.2016 6
Chainless Bicycle 25 km/h Second Evaluation Model X-PESA 1ST LIGHT ELECTRIC VEHICLE SUMMIT - BARCELONA, 20-21.9.2016 7
Operation Modes Stepped electronic gearshift assembly Manuel mode: 20 gears (with up-/down buttons at the handlebar) Steppless automatic electronic gearshift assembly Variable speed and torque adjustment (Cadenza is preadjustable by the driver) Choice of power assist Driver can use more or less of the applied pedaling power as driving performance (more pedaling power battery is charging, less pedaling power battery is discharging) Brake energy recovery (Recuperation) Home trainer function For all operation modes: Operation by a Smartphone via Bluetooth, up-/down buttons at the handlebar 1ST LIGHT ELECTRIC VEHICLE SUMMIT - BARCELONA, 20-21.9.2016 8
P m e c h [W] Technical Data Drive Power (Ride in the plane) 1200 X-PESA EE-SpeedBike 1000 800 Motor (Synchronous motor) Planetary Gear 90 Nm 250 W d=161 mm single-stage 120 Nm 1000 W d=182 mm single-stage Generator 150 Nm 180 Nm 600 (Synchronous generator) Planetary Gear 250 W d=150 mm single-stage 250 W d=99 mm two-stages 400 Battery Charge time 48 V, 430 Wh 1 h 40 min 48 V, 900 Wh 3 h* 200 0 0 5 10 15 20 25 30 35 40 45 50 v [km/h] Maximum speed (with battery support) Reach 25 km/h ca. 60 km 45 km/h ca. 80 km * Shortened with more powerful charger Green- Pedelec up to 25 km/h Red- SpeedBike up to 45 km/h 1ST LIGHT ELECTRIC VEHICLE SUMMIT - BARCELONA, 20-21.9.2016 9
Third Evaluation Model EE-SpeedBike 1ST LIGHT ELECTRIC VEHICLE SUMMIT - BARCELONA, 20-21.9.2016 10
Technical Data of the Motor SBM120 Brushless synchronous motor Nominal power 1000 W Peak power 2000 W Maximum torque 120 Nm Nominal torque 50 Nm Supply voltage 48 V Maximum current 80 A 3~ Maximum speed (with 28 wheel) 50 km/h* Maximum rotational speed 375 rpm Weight 4,9 kg Main dimensions 182x50 mm dxb Rated efficiency 91 % Internal single-stage planetary gear helical cut Temperature sensor External control unit 1ST LIGHT ELECTRIC VEHICLE SUMMIT - BARCELONA, 20-21.9.2016 * (software-limited to 45 km/h) 11
Technical Data of the Generator SBG180 Brushless synchronous generator Nominal power 250 W Peak power 1000 W Maximum torque 180 Nm Nominal torque 40 Nm Supply voltage 48 V Maximum current 70 A 3~ Maximum rotational speed 120 rpm Weight 2,9 kg Main dimensions 99x112 mm dxb Rated efficiency 91 % Internal two-stage planetary gear helical cut Temperature sensor External control unit 1ST LIGHT ELECTRIC VEHICLE SUMMIT - BARCELONA, 20-21.9.2016 12
Areas of Application anticipated sales 2018: about 200.000 drive systems in europe scalable over a wide range used in e.g.: - e-bikes - micro mobiles - cargo bikes - wheelchairs Quelle: Cyclopolitain, vcd.org Quelle: vrachtfiets, vcd.org Quelle: Doppelpunkt.at Quelle: MeinHollandRad.com 1ST LIGHT ELECTRIC VEHICLE SUMMIT - BARCELONA, 20-21.9.2016 13
Thank you for your attention! 1ST LIGHT ELECTRIC VEHICLE SUMMIT - BARCELONA, 20-21.9.2016