绕组式永磁耦合调速电机设计与分析

Design and Analysis of Winding Type Permanent Magnet Coupling Speed Regulating Motor

变频器调速技术虽可实现调速,但结构复杂,易受到电磁干扰,影响设备运行的可靠性。此外,当电网电压波动时,变频器难以保证整个系统正常运行。因此,在发电厂等苛刻环境下的应用受到限制。针对以上问题,提出了一种新型绕组式永磁耦合调速电机,离合采用非机械接触结构,减少了机械损耗;可直接对电动转子进行串级调速,调速迅速,且具备抗电网低电压穿越的能力。通过建立绕组式永磁耦合调速电机有限元分析模型,开展了仿真分析研究,结果表明该电机具备调速功能且转矩稳定,在工业领域中具有广阔的应用前景。

The inverter speed regulation technology can realize speed regulation.However,the inverter has complex structure and is susceptible to electromagnetic interference,which influences the reliability of equipment running.In addition,when the grid voltage fluctuates,the inverter is hard to ensure the normal operation of the whole system.Therefore,its application in harsh environment such as power plant is limited.For this problem,a new winding type permanent magnet coupling speed regulating motor is proposed.The clutch of the motor adopts a non-mechanical contact structure to reduce the mechanical loss.Then,the rotor is directly adjusted by cascade speed regulation,which has the advantages of quick response and high reliability.The structure has the capability of resisting low voltage ride-through of power grid.Finite element model of the winding type permanent magnet coupling speed regulating motor is established and finite element analysis is carried out.The results show that the motor has good speed regulation ability and steady torque.It has a broad application prospect in industry.