Unfortunately I would not suggest using an old electric drive motor for use of electrical generation, there are a number of components that a generator has from the factory that make the power generated even and safe for modern electrical appliances. Depending on your intent of use I would suggest buying a generator or even a small solar system that is already pre manufactured and engineered. From my own personal experience I found that the engineering, time and money I have poured into this project would have bought a nice used pull behind portable generator.