Diesel locomotive auxiliary engine control device

Abstract

The invention discloses a diesel locomotive auxiliary engine control device, which comprises a CPU, a power circuit, a crystal oscillator circuit, a differential filter circuit, a communication circuit, an overvoltage protection circuit and a drive circuit, wherein the power circuit provides power for the auxiliary engine control device; the crystal oscillator circuit is connected with the CPU and provides clock pulses for the CPU; the communication circuit is connected with the CPU, performs network communication with a control and display device on the locomotive through a serial port, and downloads a control program; the auxiliary engine outputs voltage feedback, the input DC voltage is converted into small-signal DC voltage through the differential filter circuit, and the feedback voltage is transmitted to an inner analog-digital converter of the CPU; the overvoltage protection circuit is connected with the CPU, and the auxiliary engine is made to output stable voltage by adjusting exciting current; and the drive circuit is connected with the CPU and drives the exciting current. The invention solves the technical problems of larger volume, installation space occupancy, larger deviation of parameters of analog devices, and susceptibility to multiple kinds of interference in the prior art.

Description

technical field [0001] The invention relates to a digital microcomputer control device, in particular to a device for controlling the output voltage of a DC auxiliary generator of a diesel locomotive. Background technique [0002] For a long time, the output voltage of DC auxiliary generators on diesel locomotives has been controlled by analog circuits, that is, circuits composed of operational amplifiers, resistors, capacitors and other discrete devices are used to control the output voltage of auxiliary generators. This analog control method has many defects: analog devices such as resistors, capacitors, and operational amplifiers will drift with temperature and time, and their parameters will drift, thereby reducing the performance of the controller. Moreover, the existing analog control circuit adopts devices with large volume and short life, such as relays, resulting in a large volume of the product and heavy maintenance workload. With the development of railway locomo...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a control device for auxiliary machines of diesel locomotives. The invention can well solve the problem that the control devices for auxiliary machines in the prior art have a large volume and occupy a lot of valuable installation space on diesel locomotives. The deviation of device parameters is large, which leads to poor product production consistency, and is easily affected by component temperature drift, aging, and electromagnetic interference, thereby reducing the technical problems of the controller's performance.

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