有限元法在电机温度场仿真中的运用

Emulation of Temperature Field of Trum

运行的超声电机会产生温升,过高的温升对超声电机的机械特性及使用寿命都有较大影响。本文首先通过实验证明压电陶瓷元件发热和摩擦层摩擦发热是超声电机温升的主要热源;然后,分别以压电陶瓷元件发热和摩擦层摩擦发热为热源,建立其相应的温度场热分布模型。并用有限元软件分别对压电陶瓷元件发热场和接触摩擦发热场进行仿真计算。计算结果表明,压电陶瓷片发热源部分,热量最大处为压电陶瓷片粘贴面的内圈;接触摩擦发热中。

During the running of TRUM,a lot of heat generates. It makes the temperature of TRUM rise quickly. Exorbitant temperature rise has great effect on mechanical characteristic and life of TRUM. It seems that the main heat reservoirs of TRUM are piezoelectric ceramic and friction. In order to study the real temperature distribution, the model of TRUM is simplified and the FEM software is used to emulate the heat generation of piezoelectric ceramic and contact friction and temperature field.