12相同步电动机模型与调速控制策略

Model and speed regulation control strategy of12-phase synchronous motor

对12相同步电动机的数学模型进行了分析,结果表明,在合理假设的基础上,4套绕组输入电流、电压以及磁链的d鄄q轴分量是相等的,即4套绕组对总的电磁转矩的贡献是相同的。进一步推导得到了气隙磁链定向控制12相同步电动机调速系统的气隙磁链观测器。在此基础上,提出了12相同步电动机调速系统的控制策略:将总的转矩电流均分为4份,每份将是单Y绕组的给定转矩电流,再根据三相同步电动机气隙磁链定向控制方法,得到相应的脉冲触发顺序,使负载电流跟踪给定值变化,完成调速控制要求。该理论分析将为进一步的系统实现提供重要的依据。

A model of12-phase synchronous motor is analyzed,which indicates that,based on reasonable assumption,the d-q currents,voltages and flux of four set windings are equal.That is,the contributions these four set windings act to the totalelectromagnetic torque are equal.An air-gap-flux observer used for air-gap-flux-orient control of12-phase synchronous motor speed regulation system is obtained.Based on the analysis,a control strategy for12-phase synchronous motor speed regulation system is advanced.The total torque current is divided into four equal parts,which will be the setting torque current of each set winding.Using the air-gap-flux-orient control method of3-phase synchronous motor as reference,the corresponding pulses triggering sequence is got to make the load currents track the change of setting currents and to complete speed regulation control.The theoretic analysis will be the important basis of further system realization.