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It is understood that traditional motors (especially small and medium-sized motors) cannot directly adapt to the low-speed and large-torque requirements of the load, and the gear reducer becomes an essential component of most mechanical equipment. The existence of the reducer is likely to cause problems such as reduced system transmission efficiency, increased equipment volume, high demand for steel materials, high noise, and serious lubricant contamination. Based on this, domestic and foreign experts have explored the elimination of mechanical reducers in the low-speed and large-torque transmission system, using the power supply composed of microelectronics and power electronics to integrate the motor and mechanical load to form an electronic-electrical-mechanical integration. Gearless drive system.
Experts say that the key issue of this technology is how to eliminate the torque ripple problem of the motor at low frequencies after canceling the reducer. The research team led by Professor Zhang Bingyi from Shenyang University of Technology found that sinusoidalizing the internal potential waveform of the permanent magnet synchronous motor is the key to solving the problem, and on the basis of repeated tests, successfully developed a motor that meets the requirements.
It is reported that this achievement has broad development space and market application prospects, and can be applied to various fields such as CNC machine tools, petrochemical machinery, electric machinery, metallurgy mining machinery and other mechanical reducers to achieve low-speed and large torque transmission. The energy saving and consumption reduction of mechanical equipment, as well as the further improvement and upgrading of the design level and performance level of mechanical equipment are of great significance.
Recently, it was learned from the National Natural Science Foundation of China that Chinese scientists have successfully developed a low-speed, high-torque rare earth permanent magnet synchronous motor that integrates the motor and mechanical load. Its main performance indicators have reached the international advanced level.