In the quest to enhance the efficiency and reliability of permanent magnet synchronous motors (PMSMs), a groundbreaking method has emerged from the labs of Xi’an Polytechnic University. Led by ZHANG Lei, a researcher from the School of Electronics and Information, this innovative approach promises to revolutionize position sensorless control, a critical component in the energy sector.
PMSMs are the workhorses of modern industry, powering everything from electric vehicles to wind turbines. Their efficiency and precision make them indispensable, but controlling them without physical sensors has been a persistent challenge. Traditional methods often rely on band pass filters, which introduce phase delays and compromise performance. This is where ZHANG Lei’s research comes into play.
The new method leverages a second order-second order generalized integrator (SO-SOGI) to observe rotor position and speed information with unprecedented accuracy. “The SO-SOGI’s ability to extract fundamental frequencies without phase delay is a game-changer,” ZHANG Lei explains. “It allows us to output specific frequency signals reliably, improving both static and dynamic performance.”
The implications for the energy sector are profound. In wind turbines, for instance, precise control of PMSMs can lead to significant energy savings and reduced maintenance costs. Similarly, in electric vehicles, improved motor control can enhance range and performance, making electric mobility more attractive and sustainable.
The research, published in Xi’an Gongcheng Daxue xuebao, which translates to Journal of Xi’an University of Architecture and Technology, demonstrates a remarkable improvement in rotor position estimation accuracy by about 0.7 radians during static operation. Moreover, the speed estimation error during dynamic operation is reduced by approximately 62.5%. These advancements not only enhance the reliability of PMSM systems but also make them more adaptable to low-speed operations and better equipped to handle interference.
The commercial impact of this research could be substantial. Companies investing in renewable energy and electric mobility will find this technology particularly appealing. The improved efficiency and reliability of PMSMs can lead to cost savings and performance enhancements, making these technologies more competitive in the market.
As the energy sector continues to evolve, the need for innovative solutions to optimize motor performance becomes increasingly critical. ZHANG Lei’s work on SO-SOGI-based position sensorless control represents a significant step forward in this direction. By addressing the limitations of traditional methods, this research paves the way for more efficient, reliable, and cost-effective motor control systems. The future of PMSM technology looks brighter than ever, and the energy sector stands to benefit immensely from these advancements.
