为了提高步进电机运行的平稳性,提出一种基于CPLD的双极性步进电机细分驱动器设计方案.在选择合理的电流波形的基础上,采用CPLD对斩波恒流均匀细分驱动技术方案.特别在细分波形上,根据步进电机电枢内电流的特性,采用对步进电机励磁绕组中电流的控制,合理选择步进电机相绕组细分电流波形,进行插值补偿,在功率驱动控制上采用快衰减和慢衰减相结合的混合控制方式,实现减小步进电机步距角以及复杂的时序逻辑功能.实验结果表明,基于CPLD双极性步进电机细分驱动器设计的驱动系统,细分精度高,具有更好的驱动性能,电机驱动器运行稳定.%In order to improve the smoothness of stepper motor,a bipolar stepping motor subdivision driver is designed based on CPLD.By selecting the rational current waveform,CPLD is used for chopper constant current subdivision driving technology.Especially in subdivision waveform,according to the characteristics of stepper motor armature current,by controlling current in stepper motor excitation windings,the phase winding subdivision current waveform of stepper motor is reasonably selected for interpolation compensation.Fast attenuation is combined with slow attenuation in the power drive control to reduce stepping angle of stepper motor from corner and achieve complex timing logic functions.Experimental results show that bipolar stepping motor subdivision driver with CPLD has high precision and the motor driver is stable.
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