The Research of Pulse Width Modulation in Agriculture Automatic

Abstract

In agricultural technological processes automation control increasingly is used the micromotors and micro drives. This leads to investigate the speed regulation characteristic of micromotors and expanding field of using in agricultural technological processes automation. The aim of the article is research the current modulation influence to direct current micromotor speed regulation characteristic and power losses. From experimental research was determinate optimal commutation period in pulse width converter – micromotor system, which is 0,6 ms. At this commutation period maximal limitary current is 45 mA, and speed regulation characteristic characteristic’s in continues current zone is linear and parallel to natural micromotor dynamoelectric characteristic. For these reasons, pulse width modulation system can be used in the agricultural process automation chain, where are required the speed control. Ill. 9, bibl. 8 (in English; summaries in English, Russian and Lithuanian).