Design Of 22 KW Permanent Magnet Auxiliary Synchronous Reluctance Motor For Electric Vehicles

New energy electric vehicles will gradually replace traditional fuel vehicles and become the development direction of the automotive industry.The electric motor is a key component of electric vehicles.The research and development of electric motors for vehicles with simple structure,high efficiency,low cost,high reliability,and adaptability to harsh environments is an important link in the development of new energy electric vehicles.Traditional permanent magnet synchronous motors use rare-earth permanent magnet materials,which are costly and difficult to adjust for weak magnetic fields.The permanent magnet auxiliary synchronous reluctance motor has lower requirements on permanent magnet torque because it can generate larger reluctance torque.It can not only reduce the amount of rare earth permanent magnets,reduce costs,but also increase the field weakening speed range.Provide performance similar to permanent magnet synchronous motor.The main research content of this subject is the design and optimization of permanent magnet auxiliary synchronous reluctance motors for 22 kW electric vehicles.First,some main data of the permanent magnet auxiliary synchronous reluctance motor are calculated,and the motor winding form and the number of permanent magnet layers are selected by analyzing the relationship between the motor torque,the alternating and direct axis flux linkage and the inductance.Through the comparison and analysis of the torque components of the single-layer permanent magnet structure of the Nd Fe B permanent magnet synchronous motor and the permanent magnet synchronous reluctance motor using ferrite material and the relative motor performance,the advantages of the permanent magnet auxiliary synchronous reluctance motor are verified;Through the analysis of the air gap magnetic density and radial electromagnetic force when the motor is no-load and rated load,the vibration of the motor is studied,and the corresponding conclusions are drawn.The permanent magnet-assisted synchronous reluctance motor is currently in the theoretical research stage,and practical design methods are insufficient.Through research,we propose to optimize the distance between the transverse slot and the skew part of the rotor magnetic barrier.By parameterizing the magnetic barrier,the torque ripple is as low as possible while ensuring that the average torque is as large as possible,and the motor as a whole Performance is improved.It provides a solid theoretical basis for the practical application of permanent magnet auxiliary synchronous reluctance motors.