id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
app01-10435	Hermanová, Jolana	Gear ratio optimization of single and two-speed transmission for an electric motorcycle	2024	8	.pdf	application/pdf	5264	321	55	19 Jolana Heřmanová Acta Polytechnica CTU Proceedings sists of (from top) vehicle speed, electric motor speed, electric motor mechanical power (maximum of 42 kW in the maximum torque variant, 36 kW in case of limited torque variant), and gear ratio. The main visible features are these: • high available torque at low motor speed, goes roughly to zero speed with constant torque (the color is hidden for efficiency under 50%), • very low efficiency in high load and low speed (top left corner), under 50%, • area of constant motor power and decreasing torque, approximately (in this specific case) for motor speed above 4000RPM, • the area of best efficiency is located in higher speed and moderate loads, with maximum efficiency of up to 97%, The gear ratio has to be chosen with respect to a mo- tor speed range and vehicle required speed range, and on the other hand, with respect to demanded torque on wheels ensuring sufficient acceleration.	cache/app01-10435.pdf	txt/app01-10435.txt