Alternating current control device of mining electric locomotive

Abstract

The utility model discloses an alternating current control device for a mining electric locomotive, which belongs to the technical field of mining electric locomotives and comprises an electric locomotive body and a device body mounted on the electric locomotive body, and the device body comprises an air compressor, an alternating current motor, an inverter and a charger which are sequentially connected. The air compressor is installed on the side, close to the front end of the motor vehicle body, of the motor vehicle body mechanical chamber, the charger is located in the center of the motor vehicle body mechanical chamber, the alternating current motor is installed on the side, close to the charger, of the air compressor, and the inverter is arranged over the alternating current motor and located on the same horizontal line with the charger. According to the utility model, the inverter, the charger and the air compressor are arranged in a matched manner, so that the problem of electric power waste caused by high power consumption of a direct-current motor in the prior art is solved, and the situation that the head of the air compressor driven by the direct-current motor is easy to damage is avoided.

Description

Technical Field

[0001] This utility model relates to the field of mining locomotive technology, specifically to an AC control device for mining locomotives. Background Technology

[0002] As the main auxiliary rail transport equipment in coal mines, electric locomotives are responsible for transporting personnel, equipment, and gangue. They play an extremely important role in coal production and are one of the main pieces of equipment in underground transportation hubs. The safe and efficient operation of electric locomotives is an essential condition for ensuring normal mine production.

[0003] Most existing electric locomotives are driven by DC motors. For example, patent application number 200920102705.9, entitled "Overhead-Wire Mining Electric Locomotive with Independent Control Power Supply Device," discloses a locomotive including an air compressor, a 24V DC generator fixed on the locomotive, and a lead-acid battery. The 24V DC generator is connected to the air compressor pulley via a belt, and the lead-acid battery is connected to the power output terminal of the 24V DC generator. In operation, the air compressor on the mining locomotive provides the initial power, which drives the 24V DC generator to generate electricity via the belt. The generated electrical energy is stored in the battery, and then the battery provides the power required for control signals. However, due to the problems of DC motors being too large, having slow operating speeds, being mismatched with the speed of the air compressor head, and having high power consumption, the failure rate and operating cost of this type of locomotive are relatively high. Utility Model Content

[0004] The purpose of this utility model is to provide an AC control device for mining locomotives to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an AC control device for a mining locomotive, comprising a device body installed in the machine room of the locomotive body. The device body includes an air compressor, an AC motor, an inverter, and a charger connected in sequence. The air compressor is installed on the side of the machine room near the front end of the locomotive body, and the charger is located at the center of the machine room. The AC motor is installed on the side of the air compressor near the charger, and the inverter is positioned above the AC motor. The charger is electrically connected to a pantograph installed on the top of the locomotive body for transmitting DC power to the power grid.

[0006] Preferably, the charger and the pantograph are connected by a wire, and the wire is wrapped with a phenolic foam plastic layer.

[0007] Preferably, the inverter and the charger are connected via a high-voltage line.

[0008] Preferably, the AC motor and the inverter are connected via a low-voltage line.

[0009] Preferably, both the high-voltage line and the low-voltage line are provided with a protective layer, which is made of fiber or nano-insulating material.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0011] This utility model discloses an AC control device for mining locomotives. Through the coordinated arrangement of an inverter, a charger, and an air compressor, it solves the problem of power waste caused by the high power consumption of DC motors in the past, avoids the easy damage to the air compressor head driven by DC motors, effectively extends service life, improves work efficiency, and reduces the company's operating and production costs. It has great application and promotion value. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] In the diagram: 1. Electric locomotive body; 2. Device body; 21. Air compressor; 22. AC motor; 23. Inverter; 24. Charger; 3. Pantograph. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] like Figure 1As shown, an AC control device for a mining locomotive is disclosed. The device body 2 is installed inside the machinery room of the locomotive body 1 and consists of an air compressor 21, an AC motor 22, an inverter 23, and a charger 24, which are connected sequentially. The air compressor 21 is installed in the machinery room of the locomotive body 1 near the front end of the locomotive body 1. The AC motor 22 is installed on the side of the air compressor 21 near the charger 24. The inverter 23 is located directly above the AC motor 22 and at the same horizontal level as the charger 24. The charger 24 is located in the center of the machinery room of the locomotive body 1. The four modules are arranged in a Z-shaped structure to improve space utilization. The AC motor 22 and the inverter 23 are connected via a low-voltage line, and the inverter 23 and the charger 24 are connected via a high-voltage line. By coordinating the inverter 23, charger 24, and air compressor 21, the problem of power waste caused by the high power consumption of DC motors in the past is solved. The problem of easy damage to the compressor head of air compressor 21 driven by DC motor is avoided, effectively extending service life, improving work efficiency, and thus reducing the company's operating and production costs.

[0016] The top of the electric locomotive body 1 is equipped with a pantograph 3 for contacting the power grid to transmit DC power. The charger 24 is connected to the pantograph 3 by a wire. The wire is wrapped with a phenolic foam plastic layer, which provides a certain degree of protection for the wire. Both the high-voltage line and the low-voltage line are equipped with a protective layer made of nano heat insulation material, which effectively extends the service life of the high-voltage line and the low-voltage line.

[0017] Working principle: First, the pantograph 3 on the locomotive body 1 is raised to contact the DC power grid. The DC power in the grid is converted into 48V low voltage by the charger 24 to power the locomotive. Then, the low voltage output by the charger 24 is converted into 380V three-phase AC power by the inverter 23 to power the AC motor 22 on the air compressor 21.

[0018] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A mine electric locomotive alternating current control device, comprising a device body (2) installed in a mechanical chamber of a locomotive body (1), characterized in that: The device body (2) comprises an air compressor (21), an AC motor (22), an inverter (23) and a charger (24) connected in sequence, the air compressor (21) is installed on the mechanical room of the motor car body (1) near the front end of the motor car body (1), the charger (24) is located at the center position of the mechanical room of the motor car body (1), the AC motor (22) is installed on the side of the air compressor (21) near the charger (24), the inverter (23) is arranged above the AC motor (22), and the charger (24) is electrically connected with the pantograph (3) arranged on the top of the motor car body (1) for contacting the power grid to transmit direct current.

2. The mine electric locomotive AC control device of claim 1, wherein: The charger (24) and the pantograph (3) are connected through wires, and the outside of the wires is wrapped with a phenolic foam plastic layer.

3. The mine electric locomotive AC control device of claim 1, wherein: The inverter (23) and the charger (24) are connected through high-voltage lines.

4. The mine electric locomotive AC control device as claimed in claim 3, characterized in that: The AC motor (22) and the inverter (23) are connected through low-voltage lines.

5. The mine electric locomotive AC control device of claim 4, wherein: The high-voltage lines and the low-voltage lines are each provided with a protective layer made of fiber or nano thermal insulation material.

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