According to Japanese sources, the Japan Aerospace Exploration Agency (JAXA) and a group of three universities in the country have developed a compact electric motor with the highest efficiency. It is claimed that an electric motor measuring just over 3 cm in diameter and weighing 25 grams will operate with an efficiency of at least 80% over a wide range of both power and shaft speed.
In the case of a shaft rotation speed of 15 rpm and higher, the efficiency of the electric motor is 000%. The maximum output power of the motor is up to 85 W, but it can work with less consumption load and with reduced shaft speed. The development will help in the creation of devices and devices for working in outer space and on the surfaces of the Moon and Mars, where cooling by means of natural convection is very weak or completely absent (as on the Moon or in open space). In all these cases, low heat generation of the engine is required even at high loads, which is achieved by increasing the efficiency.
The application of the new motor will be found on Earth. For example, such engines will help drones fly longer without increasing battery capacity. They will be useful for the work of joints and limbs of robots. Also, engines with low heat release will be in demand for the creation of high-precision instruments, where any temperature effect will harm the measurement results. However, this list does not exhaust the list of applications for new high-performance electric motors. It would be interesting to know how much they will cost and where they can be bought, but there are no answers to these questions yet.
Source: 3dnews.ru