Hello friend, you can’t change it. It should be because the generator is made based on the principle of electromagnetic induction. Your original motor’s rotor is made of multiple silicon steel sheets superimposed and cannot produce electromagnetic induction, while the generator’s rotor is a Permanent magnets, this type of generator is called a rotating pole generator. The principle of an electric motor is that an energized coil generates a strong magnetic field, and the rotor rotates under the action of torque. So your motor cannot be changed into a generator. You can buy one, it's not very expensive, if you need it. Thank you
Don’t do it. The power generation will never exceed 100W. What do you think this little power can do?
If you must use wind power, I recommend using a car’s permanent magnet motor, which is more convenient and more powerful.
All you have to do is go offline again, and the cost is much lower than that.