Magneto-generator is a perpetual motion machine.
Perpetual machine is an imaginary machine that can continuously move and do work without external input energy or only one heat source. Historically, people have been keen on developing various types of perpetual motion machines, including academic masters such as Leonardo da Vinci and Joule, and some swindlers who want to be famous and make money for perpetual motion machines. After the establishment of the thermodynamic system, people proved that the perpetual motion machine violated the basic principles of thermodynamics through strict logic. Since then, there have been few researchers on perpetual motion machines. However, from one side, we can also think that human enthusiasm for perpetual motion machine and various practices of manufacturing perpetual motion machine have promoted the establishment of thermal system and the progress of mechanical manufacturing technology.
1775, the French Academy of Sciences passed a resolution declaring that perpetual motion machines would never be accepted. At present, the United States Patent and Trademark Office prohibits the issuance of patent certificates for perpetual motion machines. The word perpetual motion machine is now more used as a rhetoric to describe those who are energetic and tireless.