Study on the possibility of converting the YBT-52-2 local fan motor into a direct-start permanent magnet synchronous motor

Abstract

In the underground coal mining industry, there are many electrical loads that use squirrel cage rotor synchronous electric motors as hybrid motors such as local fans, water pumps, conveyors, etc. These motors are usually imported from Russia, China, Poland ... and currently manufactured in the country. These motors are built to the Standard and have an efficiency within the IE1 range, i.e. an efficiency of about 70% or more. Therefore, the need to produce an alternative type of engine with higher efficiency becomes more and more urgent.

In the world, people have applied high inductance and permanent magnet density materials (NCVC) to make direct-start permanent-magnet synchronous motors (LSPMSM) from the grid to save electricity and high efficiency. high in the IE2 and IE3 efficiency ranges with power ranges from a few W to hundreds of kW. In the content of the article, the authors present comparative evaluation results between 2 motors LSPMSM and KDB 11kW local fan YBT-52-2 with the same design parameters, thereby giving an objective view to readers.