Research Of Low Speed And High Torque Permanent Magnetic Synchronous Machine For Crane Use

In fields like Port Crane, metallurgy and oil exploration, owing to its complexstructure, low overall efficiency, traditional asynchronous motor with multi-stage reducerdrive system, can’t meet the need of the current development. Develop low-speedhigh-torque PMSM which can be drived directly as the alternative products is urgentlyneeded.Firstly, This paper researched the application of Permanent Magnet SynchronousMotor in port crane fields, designed a Adjust Speed PMSM of130kW. While Its smallerand lighter, the PMSM can lift weights with higher efficiency. It also laid the foundationof the PMSM’s directly drive.This paper designed the PMSM with low-speed high-torque according to the needof port crane. Combined with RMxprt software, the paper analysed the influence of thelength of magnetization direction of permanent magnet on PMSM, and the design of themotor was optimized according to the result of the analysis.Combined with Ansoft Maxwell2D, this paper discussed the Finite ElementAnalysis of the PMSM, analysed the no-load magnetic field and rated operation of themotor, then adjusted the design in order to optimize the magnetic field distribution andoperational performance of the PMSM.This paper analysed the application of fractional slot in low-speed high-torquePMSM. By comparing the operational performance of the PMSM with fractional slotwith the original design, this paper analysed the influence of fractional slot windings onthe magnetic field distribution, induction anti-potential waveform and cogging torque ofthe motor. At last, this paper discussed the advantages and disadvantages of fractionalslot windings, which can provide a reference for fractional slot windings using in PMSMwith low-speed high-torque.