Cheap ebikes are already that - you can normally swap motors, batteries and motor controllers between brands.
Batteries are all 48v lithium, with protection circuits built in. Motors are all 3 phase brushless. Controllers just take DC input, and output to a 3 phase motor.
Most take pwm input for torque or a magnetic pedal sensor.
The resulting bike feels 'cheap' due to all the parts not working well together (for example, they always jerk a bit when pulling away because the motor has no position sensor)
Batteries are all 48v lithium, with protection circuits built in. Motors are all 3 phase brushless. Controllers just take DC input, and output to a 3 phase motor.
Most take pwm input for torque or a magnetic pedal sensor.
The resulting bike feels 'cheap' due to all the parts not working well together (for example, they always jerk a bit when pulling away because the motor has no position sensor)