采用DSP和IPM的电梯门机控制系统

基于DSP和IPM的电梯门机控制系统以TMS320LF2407和IPM为核心.2407输出PWM信号经光电耦合器接入IPM.5V控制信号隔离后转换成3.3V接2407.所测电流经滤波放大送2407进行AD转换.编码器检测速度、位移量,输出相差90°的方波信号,整形后送脉冲接口单元,经译码逻辑单元产生脉冲信号和转向信号.DSP和PC间为异步通信,采用相对于SVPWM的软件转换模式和调制方法获得电机的转速和转向信息,实现门机控制.

Control System for Door-Motor of Elevator Based on DSP and IPM

TMS320LF2407 and IPM was used in control system for door-motor of elevator based on DSP and IPM. The PWM signal from 2407 was transmitted to IPM through photocoupler. 5v control signal was transformed into 3.3v, and sent into 2407. The current measured that has been filtered and amplified was sent into 2407 to carry out AD transformation. The encoder measure the velocity and the displacement, generate square wave signals which difference between the phases is 90, then the signals modified were sent to impulse interface unit. The pulse signal and signal turned direction was generated through coding logic circuit. Asynchronous communication is adopted between DSP and PC. The speed and direction information of motor is obtained with software switching pattern of SVPWM and modulating to realize the control door-motor of elevator.