一种高效的两相步进电机控制技术

An Efficient Control Technology of Two-phase Stepper Motor

针对航天产品的小型化长寿命特点,设计了一种高可靠的航天用两相步进电机控制电路;系统采用单片机ATMEL80C32作为主控芯片,利用集成度较高的PWM控制芯片SG3525和电机运动控制芯片LMD18200设计驱动控制电路,并与电流反馈网络构成了电机电流的闭环控制,具有恒流正弦细分和PWM控制的功能,试验表明该系统最高可输出256细分的正弦波电流,电路简单可靠,能够满足航天产品高可靠性长寿命及小型化的需求。

Direct at Miniaturization character and long--period requirements for the aerospace product, the high reliability control system of two--phase stepper motor for aerospace is proposed . ATMELSOC32 is used as control chip for the system, PWM modulation circuit SG3525 and H--bridge LMD18200 are used to design the circuit for the control and drive system of stepper motor. This control system also includes closed--loop control of motor-- current by current-- feedback net. The function of constant-- current divided and PWM control is provided for this system. Output of maximal 256 divided segments of the sinusoidal current is testified by experiments result. This system is simple and reliable, and able to meet the high reliability long--period and miniaturization character requirements for aerospace products.