TANG Chen yu, ZHAO Guo jun

（The Ministry of Education Key Lab of Mechanical Manufacture & Automation, Zhejiang University of Technology,

Hangzhou 310014, China）

Abstract: Aiming at the problem of poor comfort, low efficiency and complexity of inverter debugging in the conventional speed control of elevators, the studies of the speed control mode, the elevator speed curve and other aspects were focused on. The original remaining distance algorithm was improved, and the elevator variable frequency control system based on LPC1114 with ARM Cortex M0 core and the absolute remaining distance principle was put forward. By building the experimental platform, the elevator speed control system software was developed and the experiment of elevator speed curve was proceeded. The results indicate that the speed control mode based on the principle of absolute surplus can eliminate the low speed crawling section in the traditional control mode, effectively improve the comfort and rapidity of the elevator, and greatly simplify setting of parameters and debugging of frequency converter in analog output driving control mode.

Key words: speed control; absolute surplus distance; speed curve; analog output