同步永磁耦合器动力学特性仿真研究（英文）

Simulation research on dynamic characteristics of synchronous permanent magnet coupling

针对同步筒式永磁耦合器,通过仿真软件计算了其主动永磁转子与从动永磁转子之间的转角差与所传递转矩的关系曲线。在扭矩曲线工作点附近,采用线性化处理,定义了永磁耦合器的等效扭转刚度K。采用合理的假设与简化,建立了同步永磁耦合器在工作过程中的动力学微分方程,然后进行拉普拉斯变换获得系统传递函数。永磁耦合器在工作过程中会经常遇到冲击性负载或正弦波负载,分别采用单位脉冲信号与正弦波信号进行模拟,求解系统的时间响应曲线,验证同步永磁耦合器的抗冲击性与减振性。研究结果表明:永磁耦合器在工作过程中遇到冲击性负载时,转角差增量会随着系统固有频率不断衰减振荡直至消除;当遇到周期性正弦波负载时,转角差增量的瞬态响应会随着系统固有频率不断衰减振荡直至消除,转角差增量的稳态响应表现为伴随着激振源持续振荡,但相位角滞后于激振源,稳态响应频率与强迫振动的频率相同,稳态响应振幅与永磁耦合器扭转刚度有关,最终验证了同步永磁耦合器具有优良的抗冲击性与减振性。

For the synchronous drum type permanent magnet coupling,the torque curve between the active permanent magnet rotor and the driven permanent magnet rotor is calculated by simulation software.The equivalent torsional rigidity K of permanent magnet coupling is defined by linearization near the working points of the torque curve.Using reasonable assumption and simplification,the dynamic differential equation of synchronous permanent magnet coupling is established in the course of work,and the system transfer function is obtained by Laplace transform.When working,the permanent magnet coupling will often encounter the impact load or the sine wave load.The system is simulated under the unit pulse excitation and the harmonic excitation respectively in order to solve the time response curve.It is crucial to verify the shock resistance and vibration reduction behavior of synchronous permanent magnet coupling.Our study shows that when permanent magnet coupling encounters the impact load in the course of work,the angle difference incrementθ(t)will continue to oscillate and decay until elimination with the natural frequency of system.When permanent magnet coupling encounters the harmonic load,the transient state response of angle difference incrementθ(t)will continue to oscillate and decay until elimination with the natural frequency of the system.The steady state response shows that the angle difference incrementθ(t)persists with the excitation source.The frequency of steady state response is the same as the frequency of forced vibration,but the phase angle lag behind the excitation source.The amplitude of the steady state response is related to the torsional rigidity of permanent magnet coupling.Finally,it is proved that permanent magnet coupling has excellent properties of shock resistance and vibration reduction.