Car dumper re-adjusting machine frequency converter capacity maximum utilization method

Abstract

The invention discloses a car dumper re-adjusting machine frequency converter capacity maximum utilization method. When the output train heavy wagon of the car dumper re-adjusting machine exceeds a specified number of sections, the electric control loop of a standby motor is used for controlling the standby motor to be put into or out to increase the energy of the frequency converter, the electriccontrol loop of the standby motor comprises a PLC, an air switch 1K, a frequency converter switch BK, a relay 1 ZJ, a contactor KM and a thermocouple FR, one end of the air switch 1K is connected with the live wire L, and the other end of the air switch 1K is serially connected with the frequency converter switch BK, the normally-opened end of the relay 1 ZJ, the contactor KM and the thermocoupleFR and then is connected with the null line and the start-stop button of the standby motor at the same time, one end of the PLC is connected with the live wire, and the other end of the PLC is connected with the relay 1 ZJ in series and then is connected with the null line and the signal control end of the car dumper re-adjusting machine, and a contactor KM normally-open switch is arranged in thePLC. According to the invention, the problem that in the prior art, when the capacity of the frequency converter is exceeded at present, and the tripping occurs in the operation is solved.

Description

technical field [0001] The invention relates to a method for maximizing the utilization of the capacity of a frequency converter, in particular to a method for maximizing the utilization of the capacity of a frequency converter of a dumper readjustment machine. Background technique [0002] Frequency converters are widely used due to their advantages of adjustable frequency and slow start. The power setting of the inverter when it leaves the factory generally has a certain margin. On the premise of ensuring safety, the capacity of the inverter can be expanded by giving full play to the margin of the inverter and adjusting the operating time of the inverter. In this way, It can not only give full play to the role of the frequency converter, but also save the cost of repurchasing the frequency converter. The readjustment design of our company's dumper is driven by 4 motors, and the output is 48 trains. Gear damage will affect the service life of the transmission gear, so a s...

AI Technical Summary

Problems solved by technology

The readjustment design of our company's dumper is driven by 4 motors, and the output is 48 trains. Gear damage will affect the service life of the transmission gear, so a spare motor is needed to increase the readjustment output. After the spare motor, the capacity of the frequency converter cannot meet the requirements. It will cost a lot to replace the frequency converter. In view of this situation, by changing How to set the frequency converter to improve the ability of the frequency converter

The rated power of the currently used motor is 63KW, the rated current is 125.8A, the total power of the four sets is 252KW, and the rated current is 503.2A. The rated power of the inverter is 315KW, and the rated current is 590A. 130A, after one motor is spared, the total power of the five motors is 315KW, and the rated current is 629A, which exceeds the capacity of the current inverter, and tripping occurs during operation

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