[关键词]
[摘要]
为了兼顾永磁电机低速、大转矩特性和恒功率区的运行范围,提出一种变磁阻可控磁通永磁游标(RVFCPMV)电机。以1台三相22/2对极RVFCPMV电机为例,介绍了RVFCPMV电机的拓扑结构。基于气隙磁通密度的调制,揭示了该电机具有低速、大转矩特性的实质,突破在电枢绕组中通入直轴去磁电流分量的传统弱磁方式,提出一种利用铁磁材料非线性导磁特性,通过调节励磁电流进而改变磁路磁阻方式实现永磁电机弱磁升速的方法。通过有限元方法对RVFCPMV电机进行了计算和分析,验证了该电机基速以下的低速、大转矩输出特性和基速以上的弱磁调速能力。
[Key word]
[Abstract]
In order to take both of the lowspeed and hightorque characteristics of permanent magnet machines and the operating range of constant power range into account, a fluxcontrollable permanent magnet vernier (RVFCPMV) machine was proposed. Taking a threephase RVFCPMV machine with 22/2pole as an example, the RVFCPMV machine topology was introduced firstly. The equivalent magnetic circuit method was used to reveal the characteristics of lowspeed and hightorque. Different with the traditional flux weakening method by injecting daxis demagnetization current component into armature windings, a new flux weakening control method was proposed, of which the key was to change the magnetic circuit reluctance based on the nonlinear performance of ferromagnetic materials by adjusting the excitation current. The electromagnetic performances of RVFCPMV machine were calculated and analyzed using finite element analysis, which verified the characteristics of lowspeed and hightorque output and the capacity of flux weakening control.
[中图分类号]
TM 302
[基金项目]
国家自然科学基金项目(51677081,51377073);江苏省高校优势学科项目;江苏大学高级人才启动基金项目(14JDG169);江苏大学“青年骨干教师培养工程”项目