摘  要：基于无刷直流电动机换相过程分析，推导出考虑绕组电磁时间常数的电流-转速特性和转矩-转速特性简洁表达式, 给出平均电流比和平均电磁转矩比的函数关系图，讨论了绕组电阻和电感值变化对电机特性的影响。提出了单回路等值电路和视在电阻，给出了转矩系数与反电势系数的计算公式。研究结果解决了现有特性计算没有计及绕组电感的明显不足，有助于提高无刷电机特性预测计算的准确程度。
关键词：无刷直流电动机；特性；参数；等值电路；转矩系数；反电势系数

Abstract: In this paper,performance characteristics and parameters of brushless DC motor were analyzed based on the commutation process.The expression of current characteristics and torque characteristics were given to consider winding electromagnetic time constant.The paper discussed the winding resistance and inductance values,that impact motor characteristics.Single-loop equivalent circuit was proposed.The calculation formulas of torque coefficient and back-EMF coefficient were given.
Key Words: Brushless DC motor；Characteristics；Parameters；Equivalent circuit；Torque coefficient；Back-EMF coefficient