US 11,926,392 B2
Electric bicycle speed control device and method
In Ha Paick, Seoul (KR); Seungkyung Lee, Gyeonggi-do (KR); Young Sin Kim, Seoul (KR); and Kyung Ho Hong, Seoul (KR)
Assigned to HL MANDO CORPORATION, Gyeonggi-Do (KR)
Appl. No. 17/298,557
Filed by HL MANDO CORPORATION, Gyeonggi-do (KR)
PCT Filed Jul. 29, 2020, PCT No. PCT/KR2020/009983
§ 371(c)(1), (2) Date May 29, 2021,
PCT Pub. No. WO2021/235595, PCT Pub. Date Nov. 25, 2021.
Claims priority of application No. 10-2020-0060161 (KR), filed on May 20, 2020.
Prior Publication US 2022/0185427 A1, Jun. 16, 2022
Int. Cl. B62M 6/50 (2010.01)
CPC B62M 6/50 (2013.01) 10 Claims
OG exemplary drawing
 
1. An electric bicycle speed control device comprising:
a speed sensor unit configured to measure a rotation speed of a wheel and a rotation speed of a generator driven by a pedal;
a current sensor unit configured to measure driving currents of a motor for driving the wheel and the generator;
a wheel speed control unit configured to generate a wheel torque command value using a wheel speed command value obtained by multiplying a rotation speed of the pedal measured by the speed sensor unit by a gear ratio and a wheel speed value measured by the speed sensor unit;
a wheel torque control unit configured to generate a motor driving control current for driving the motor using the wheel torque command value and a driving current value of the motor measured by the current sensor unit; and
a pedal torque control unit configured to generate a generator torque control current for controlling a torque of the generator using a value obtained by applying an assist level to the wheel torque command value and a generator driving current measurement value measured by the current sensor unit.