Mid-drive e-bike

A mid-drive electric bicycle gearing system comprising:

• a mid-drive electric motor;
• a chain rotatably connected to the mid-drive electric motor;
• a cassette comprising a cassette sprocket;
• a gearing system mounted in a rear wheel hub, the gearing system is rotatably connected to the chain via the cassette;
• and
• a mechanical brake connected to a component of the gearing system, said mechanical brake comprising a disc brake,
• wherein during driving mode the mid-drive electric motor and the chain rotate in a forward driving direction;
• and
• wherein during operation of the mechanical brake, the gearing system is configured to cause rotation of the chain in a backward direction opposite to the forward driving direction, which mechanically forces the mid-drive electric motor to rotate in the backward direction, to thereby regenerate electric energy;
• and
• a control system configured to control an amount of power supplied by the mid-drive electric motor during the driving mode, and to control an amount of negative braking torque applied by the mid-drive electric motor during the regenerative braking mode, said control system comprising a processor configured to:
• predefine a set point value;
• calculate a process value;
• and
• determine an amount of negative braking torque required for equality between the process value and the set point value.