For hundreds of years, there have been countless inventions about perpetual motion machines all over the world, but no one has ever really succeeded. In order to prevent people from wasting time and resources in this field, and also to prevent some people from using the so-called patented technology that cannot be realized in this field to defraud investment, the patent law clearly stipulates the scope of not accepting applications.
There are many invention schemes of perpetual motion machine, which are seemingly feasible, but often ignore many details but key issues. The inventor himself didn't realize or expect them at all, so it must be feasible to stick to his own scheme, and he has invested a lot of time, money, energy and enthusiasm in this respect, but it is doomed to be impossible under the existing theoretical system.
In order to make a breakthrough in this respect, I think we must first break through the constraints of the law of conservation of energy in theory, and then we can find the direction. But this is not a simple problem in basic research. If we really want to break through, it is a leap-forward problem of human understanding and social development, and it may not be possible to break through at all.