Digital DC speed control excavator control equipment developed successfully

Recently, WS1-4 (10) all-digital DC speed excavator control equipment was successfully developed in Hunan Ketong Electric Equipment Manufacturing Co., Ltd. The equipment is mature in technology, stable in performance, and overcomes many defects of similar products currently used on the market. .

According to reports, the construction of open pit mining, water conservancy and electric power facilities and other infrastructure projects, the use of electric excavator equipment, the current use of excavators in China, the electric drive and control system is basically a traditional F-D machine and the adoption The thyristor generator excitation speed control system of magnetic or electronic trigger has the disadvantages of large impact on the power grid, severe waveform distortion, high impact on the motor and mechanical components, high energy consumption, long response time, and “excavator characteristics” hardness. Poor, heavy equipment, loud noise, and large maintenance, seriously affecting equipment integrity and production efficiency.

The all-digital DC speed control device is based on the M drive module produced by British CT Company, and cooperates with the PLC program controller. The whole control system adopts software instead of hardware to reduce the hardware wiring and fault points, improve the anti-disturbance and control. The signal is processed by a 32-bit microprocessor, and the parameters are quickly accessed through the panel to achieve control, monitoring, and protection functions. The system has fault diagnosis capability, which can reliably and effectively protect the motor. When the system fails, it can be quickly eliminated according to the prompt function, ensure the continuity of production, reduce the maintenance time, improve the operation rate and mining efficiency, and increase the output.

Thanks to the elimination of high-voltage asynchronous machines and generator sets, noise and vibration are greatly reduced and the working environment is improved. The drive consists of a main board, a power amplifier board and power components. The main board and the power amplifier board can be used in a variety of bucket shovel, so that the spare parts ratio of the whole system is less than 3%, and energy consumption can be saved.

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