无刷力矩电机力矩波动系数实测值与设计值差异性

力矩波动系数是衡量无刷力矩电机品质的重要指标。在电机的研制和生产过程中,样机力矩波动系数实测值往往高于设计值。为此,通过样机试验与模拟仿真,从样机生产过程中绕组线圈、三相电流、定转子偏心等分析产生该差异性的原因,结果表明偏心是引起样机实测值大于设计值的主要原因,三相电流、绕组线圈影响次之。通过优化结构设计降低定转子偏心量,并考虑偏心引起的力矩波动对设计值进行修正,可提高力矩波动系数设计值与实测值的一致性。

Difference Between Measured and Designed Values of Torque Fluctuation Coefficient in Brushless Torque Motor

Torque fluctuation coefficient is an important index to measure the quality of brushless torque motor. In the process of development and production of motors, the measured value of the torque fluctuation coefficient of the prototype is higher than the designed value. Through the prototype test and simulation, the causes of the difference are analyzed from the aspects of winding coil, three-phase currents, and eccentricity of stator and rotor in the production process of the prototype. The results show that eccentricity is the main reason for the measured value to be higher than the designed value, while three-phase current and winding coil have less effects on the difference. By optimizing the structure design of the motor to reduce the eccentricity of stator and rotor and correcting the design value according to the torque fluctuation caused by the eccentricity, the consistency between the design value and the measured value can be improved.