Frequency conversion speed control stable line feed control method of coke oven heavy load locomotive

Abstract

The present invention relates to a coke oven heavy-duty locomotive frequency conversion and speed regulation stable running control method. The control frequency converter of the main control system has two operation modes, the speed (feedback) closed-loop control is the main method, and the torque control is the auxiliary method, so that it can operate in the fault situation The heavy-duty locomotive under the coke oven can still run forward; in various states, the torque of the inverter controlled by the slave control system is determined according to the output torque of the inverter controlled by the master control system, so that the locomotive of the slave control system and the master The locomotives of the control system keep pace; and the invention refits the distance measuring encoder to the wheel shaft of the main control system to avoid the distance measurement error caused by the slipping of the driving wheel.

Description

technical field [0001] The invention relates to a control method for smooth running of four major locomotives (coke pushing car, coke holding car, coal feeding car and coke quenching car) in the coke oven technology, which belongs to the field of electric control of coke ovens. Background technique [0002] In the prior art, the control method for the balance of the running motors of the four coke oven vehicles basically adopts the closed-loop frequency conversion control method of speed feedback. Usually, the running motors are composed of two or three sets of the same system, and each system includes a frequency converter, a running Composed of motor and mechanical transmission gearbox, each frequency converter adopts an independent speed closed-loop system to establish a speed closed-loop control mode, the purpose of which is to make the controlled motor system characteristic hard, especially at low speed to output large torque and improve response Speed ​​and dynamic per...

AI Technical Summary

Problems solved by technology

[0003] Another difficulty in the automatic running of the four major coke oven locomotives with heavy-duty frequency conversion stable control is the large positioning error, because the loading capacity of the four major coke oven locomotives is very large, and the self-load of these locomotives is almost 200 tons. Large locomotives need to run at high speed, and when the moment of inertia is very large, they need to stop stably within a very short distance. Only when the error is controlled within 30 cm can automatic alignment be performed, so it is very difficult

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