It is reported that the patent that won the gold medal in China Patent Invention Expo is (CN 1 146092 A), and the results of the patent search system are as follows:

The current legal status is:

It can be seen that this patent is not authorized at all, and there is no so-called "China Patent Invention Expo".

Li Hongtao applied for a patent under the pseudonym of Yang Hongjun. Taking Yang Hongjun as the search term, it is found that it has 1 authorized invention patents, 2 utility models and 2 unauthorized invention patents, and its only authorized invention patent has not paid the annual fee after 5 years. Imagine, if it is a very awesome patent, will it be given up because of a little annual fee?

At present, the popular motor on the market is permanent magnet brushless, not excitation brushless as claimed in the report. Technically speaking, the necessary components of rotating electric machine are stator and rotor. If permanent magnets are not used, both sides must be excited. If the stator and rotor are energized, they must be energized. In this case, rotor excitation must be carried out through slip rings. Once the slip ring is added, there is no difference between brush and brushless, which is a failure in principle.

Reading through these reports, it is not difficult to find that Kunming Detention Center has played a decisive role in Li Hongtao's invention and creation. If the director hadn't given him a proving ground for research and invention, everything would have been empty talk, mainly because the relevant leaders volunteered at the critical moment and asked experts for guidance, which made Li Hongtao achieve certain results. So Li Hongtao's invention is not particularly remarkable.