Automatic control system with double frequency converters

Abstract

The invention discloses an automatic control system with double frequency converters and belongs to automatic control field. The automatic control system comprises a host motor, a host frequency converter, a control display table, a feeder frequency converter and a feeder motor. The control display table is connected with the host frequency converter and the feeder frequency converter through wires. The host frequency converter transmits analog quantity to the control display table and the feeder frequency converter by using a wire. The feeder frequency converter transmits the analog quantity to the control display table by using another wire. The host frequency converter controls the host motor. The feeder frequency converter controls the feeder motor. The automatic control system controls a host and a feeder to automatically operate so as to reduce phenomena of equipment overload or zero load, prolong a service life of the equipment, and decrease unnecessary production cost. The automatic control system has advantages of full-automatic operation, a high safety factor, high efficiency, easy operation, and low equipment and production cost.

Description

technical field [0001] The invention relates to an automatic control system with double frequency converters. Background technique [0002] Usually, on some large-scale equipment with main engine and feeder, such as extruder, injection molding machine, pulverizer, etc., the load of the main engine is completely controlled by the feeder. When the amount of feeder control is too large, The main engine will be overloaded. On the contrary, when the amount of feeding controlled by the feeder is too small, the main engine will be under-loaded, and even the main engine will run idly. In the above two situations, the former is likely to cause damage to the motor or mechanical parts, while the latter will cause the design load to fail to meet the output requirements. Therefore, in actual production work, manual control is generally used, and workers must While looking at the ammeter of the main engine, adjust the speed of the feeder to ensure the normal operation of the equipment....

AI Technical Summary

Problems solved by technology

In the above two situations, the former is likely to cause damage to the motor or mechanical parts, while the latter will cause the design load to fail to meet the output requirements. Therefore, in actual production work, manual control is generally used, and workers must While looking at the ammeter of the main engine, adjust the speed of the feeder to ensure the normal operation of the equipment. Basically, workers cannot leave the console. A little distraction will easily cause overload or no-load operation, which will damage and utilize the equipment. While the rate has a great impact, it also virtually increases unnecessary labor costs

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