基于速度控制方式的电梯变频控制策略研究

针对传统的以时间为原则的电梯速度控制方式存在的低效率和低舒适性问题,采用了以相对距离为原则的速度控制方式对电梯速度进行变频控制。在电梯变频控制策略研究中,选用抛物线—直线形理想速度曲线为标准曲线,对不同距离所需采用的速度曲线进行了理论设计,以获得高效率和高舒适性的速度曲线;在硬件设计中,通过微机,并采用了串行通讯的方式和电梯主控制器以及电梯变频器进行通讯;在软件设计中,对抛物线理想速度曲线的速度值进行了分段分表保存,然后在运行中通过查表的方式实时获得准确速度值,并对电梯进行了速度控制。研究结果表明,和传统的以时间为原则的速度控制方式相比,采用这种以相对距离为原则的速度控制方式明显减少了电梯的爬行距离,提高了电梯的高效性和舒适性。

Research on strategy of elevator frequency control based on relative distance speed control

Aiming at the traditional time elevator speed control method is of low efficiency and low comfort, the relative distance speed control method was used to control the elevator speed. In the research of elevator control strategy, the parabolic-straight line speed curve shape was chosen as a standard curve, and the speed curves of different distances were designed. In the hardware design, microcomputer was adopted to set up communications between the host and the motor inverter through serial interface. In software design, the ideal of parabolic speed curve was sectioned to keep speed value, and then the real-time speed value of elevator was gotten through the look-up tables in the operation. The results indicate that, comparing the traditional time speed control way, the relative distance speed control way can significantly reduce the crawl distance, and improve the efficiency and comfort of the elevator.