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对新研制的一种上升外特性送丝电机调速控制系统进行了理论分析和试验。理论分析结果表明:①该控制系统中,当电枢电流对控制系统输出电压的正反馈系数Ki与电枢电阻Rs相等时,送丝电机的转速不受负载力矩变化的影响,但此时系统极易不稳定及发生振荡。②为消除控制系统在Ki=Rs处及附近区域的不稳定或振荡,必须进行控制系统校正。本文给出了校正环节参数的选择原则。对使用该控制系统的送丝机进行的性能试验结果表明:与使用传统控制系统的送丝机相比,该送丝机的送丝性能优异。
The theoretical analysis and experiment of a newly developed speed control system for wire feed motor with external characteristics are carried out. The theoretical analysis shows that: (1) In the control system, when the positive feedback coefficient Ki of the armature current to the control system output voltage is equal to the armature resistance Rs, the rotating speed of the wire feeding motor is not affected by the change of load torque. However, Extremely unstable and oscillating. ② To eliminate the instability or oscillation of the control system at and near the area Ki = Rs, the control system must be calibrated. This paper gives the principle of selecting the parameters of the calibration. The results of the performance test on the wire feeder using this control system show that the wire feeder is excellent in wire feeding performance compared with the wire feeder using the conventional control system.