Control device for human-powered vehicle and power transmission system

A control device for a human-powered vehicle including a crank axle, a first rotational body connected to the crank axle, a wheel, a second rotational body connected to the wheel, a transmission body engaged with the first rotational body and the second rotational body to transmit driving force between the first rotational body and the second rotational body, a derailleur configured to operate the transmission body to change a transmission ratio of a rotational speed of the wheel to a rotational speed of the crank axle, an electric actuator of the human-powered vehicle to operate the derailleur, and a motor configured to drive the transmission body, the control device comprising:

• an electronic controller configured to control the electric actuator and the motor, the electronic controller being further configured to control the electric actuator and drive the transmission body in a case where in a case where the derailleur has been actuated to change
• the transmission ratio and a predetermined condition related to pedaling is satisfied, and the electronic controller being configured to control the electric actuator so as not to change the transmission ratio with the derailleur until a second condition related to shifting is satisfied in a case where the electric actuator and the motor are controlled to increase or decrease the transmission ratio a predetermined number of times or more within a predetermined third time.