摘要
为了克服电焊机送丝速度波动对焊接质量的影响,传统的控制直流电机转速的方法是控制直流电机的电压和电流,该控制方法由于直流电机的特性变化,电路参数的影响会导致控制精度较差,不能适时控制其转速。在此采用锁相环技术方法锁定直流电机的速度,该方法是通过编码器测得电机的转速,并采用DSP实现全数字软件锁相环(DSPLL)控制直流电机的速度,通过可逆调速电路的脉冲宽度调节(PWM),从而精确控制电机的转速。试验表明,该方法能实时精确控制电机的速度,且其性能稳定可靠。
In order to overcome the quality in welding,the traditional way is to control vohage and current of motor,which has bad control precision caused by characteristic change and circuit parameter of de motor,so it is impossible reale-time control.This paper uses a method of Digital Software Phase-Locked Loop to control speed of DC motor.The controlling circuits of Digital Software Phase- Locked Loop（DSPLL）using digital signal process（DSP）is constructed,which is driven by the pulse-width modulation（PWM） controlled by DC motor.Finally,the experiments prove that the control method can not only realize the functions of the whole system,but also run more precisely and steadily.What＇s more, this method decreases greatly the harmonics and ripples of power supply systems.It makes the system to reale-timc control.
出处
《电焊机》
北大核心
2009年第8期64-67,共4页
Electric Welding Machine
