Energy saving based on control of static and dynamic operating modes of asynchronous motors of feed grinding devices

Abstract

Relevance: frequency control is saving because it improves the efficiency of the induction motor by rectifying the speed of the induction motor and reduces power loss. It is shown how to start and control the equipment for grinding feed using a frequency converter, which is installed between the machine and the motor and controls the speed of the motor. Previously, front gearboxes were used to change the speed of the electric motor, which, in turn, led to various difficulties. If it is necessary to reduce or increase the number of revolutions of the electric motor due to the peculiarities of the production technology, the use of additional mechanisms in the electric drive, in turn, led to an increase in the power of the electric motor. With the help of frequency converters, the speed can be directly controlled by changing the frequency of the electric motor. One of the advantages of this method is that since current and torque are closely related, the frequency converter can reduce the starting current when starting the motor. When starting, the motor starts smoothly, which saves energy during startup.

Aim: justification of energy savings due to control of static and dynamic modes of asynchronous motor of feed grinding devices.

Methods: methods of frequency control, experimental and comparative analysis were used.

Results: frequency control has enabled a 17% saving in electricity consumption, adjustment of the speed of the asynchronous motor, smooth start and stop of the electric drive, and reduction of power waste of the asynchronous motor.