Working condition locomotive speed regulating system

Abstract

The utility model discloses a working condition locomotive speed regulating system which comprises an intrinsic safety control box and at least one explosion-proof and intrinsic safety type inverter box. The intrinsically safe driver control box and the explosion-proof and intrinsically safe inverter box are connected in series or in parallel; the explosion-proof and intrinsic safety type inverter box comprises at least one explosion-proof and intrinsic safety frequency converter; the explosion-proof and intrinsically safe frequency converter is connected with at least one three-phase motor; the explosion-proof and intrinsically safe frequency converter is also connected in series with an external power supply; the utility model has the advantages that the number of required frequency converters and motors is reduced, and the connection between the frequency converters and the motors is simple and convenient.

Description

Technical Field

[0001] The utility model belongs to the field of locomotive speed regulation, in particular to a working condition locomotive speed regulation system. Background Art

[0002] With the continuous improvement of industrial automation, frequency converters have also been widely used.

[0003] When the inverter controls the motor speed, because the speed of the electric locomotive needs to be output smoothly, the inverter and motor combination needs to be adjusted according to actual needs, so as to achieve the purpose of energy saving and speed regulation; when the power demand is large, multiple motors may be required to be installed on an electric locomotive.

[0004] Normally, there are two options: 1. A single inverter controls a single motor; 2. A single inverter controls multiple motors. When a large number of motors are required, the following problems may occur: If option 1 is selected, the number of motors is equal to the number of inverters, which increases the cost and the required installation space; If option 2 is selected, although the number of inverters is reduced, each inverter requires an independent power supply, which increases the difficulty of wiring and easily leads to wiring confusion. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a working condition locomotive speed regulating system.

[0006] To achieve the above-mentioned purpose, according to the embodiment of the first aspect of the utility model, a working condition locomotive speed control system is provided, comprising an intrinsically safe control box and at least one explosion-proof and intrinsically safe inverter box;

[0007] The intrinsically safe control box and the explosion-proof and intrinsically safe inverter box are connected in series or in parallel;

[0008] The explosion-proof and intrinsically safe inverter box includes at least one explosion-proof and intrinsically safe frequency converter;

[0009] The explosion-proof and intrinsically safe frequency converter is connected to at least one three-phase motor;

[0010] The explosion-proof and intrinsically safe frequency converter is also connected in series with an external power supply.

[0011] Further: the intrinsically safe control box includes at least one intrinsically safe controller;

[0012] The intrinsically safe controller is connected in series or in parallel with an explosion-proof and intrinsically safe frequency converter.

[0013] Furthermore: the intrinsically safe controller is also connected to wireless synchronous communication, unmanned driving communication and display screen.

[0014] Furthermore: the explosion-proof and intrinsically safe frequency converter is electrically connected to the detection module.

[0015] Further: the explosion-proof and intrinsically safe frequency converter is connected to at least one three-phase motor in the following manner: the A phase of the three-phase motor is connected to the A phase motor interface of the explosion-proof and intrinsically safe frequency converter, the B phase of the three-phase motor is connected to the B phase motor interface of the explosion-proof and intrinsically safe frequency converter, and the C phase of the three-phase motor is connected to the C phase motor interface of the explosion-proof and intrinsically safe frequency converter.

[0016] Further: the explosion-proof and intrinsically safe inverter also includes a DC+ / DC- power port and an extended WDC+ / WDC- power port;

[0017] When multiple explosion-proof and intrinsically safe inverter boxes are selected, there are multiple explosion-proof and intrinsically safe inverters, and the multiple explosion-proof and intrinsically safe inverters share an external battery box, in which the DC+ / DC- power port of one explosion-proof and intrinsically safe inverter is directly connected to the external battery box, and the extended WDC+ / WDC- power port of this explosion-proof and intrinsically safe inverter is used to connect with the DC+ / DC- power port of any other explosion-proof and intrinsically safe inverter. According to this rule, the DC+ / DC- power port of any subsequent explosion-proof and intrinsically safe inverter is connected to the extended WDC+ / WDC- power port of the next explosion-proof and intrinsically safe inverter.

[0018] Compared with the prior art, the utility model has the beneficial effects of reducing the number of required frequency converters and motors and making the connection between them simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural principle diagram of the utility model's multi-driver-controlled multi-converter working condition locomotive speed control system. DETAILED DESCRIPTION

[0020] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] like Figure 1 As shown, a working condition locomotive speed control system includes an intrinsically safe control box and at least one explosion-proof and intrinsically safe inverter box; the explosion-proof and intrinsically safe inverter box includes at least one explosion-proof and intrinsically safe frequency converter; the intrinsically safe control box and the explosion-proof and intrinsically safe inverter box are connected in series or in parallel; the explosion-proof and intrinsically safe frequency converter is also connected to at least one three-phase motor; the explosion-proof and intrinsically safe frequency converter is also connected in series with an external power supply.

[0022] Specifically:

[0023] The intrinsically safe control box includes at least one intrinsically safe controller and a display screen; the intrinsically safe controller is provided with a plurality of CAN bus interfaces; the intrinsically safe control box is connected to the explosion-proof and intrinsically safe inverter in the explosion-proof and intrinsically safe inverter box by using the CAN communication bus through the CAN bus interface on the intrinsically safe controller. The intrinsically safe controller is also provided with three 485 communication interfaces; the intrinsically safe controller is respectively connected to the wireless synchronous communication, the unmanned driving communication and the display screen through the 485 communication interfaces.

[0024] The explosion-proof and intrinsically safe inverter box includes an explosion-proof and intrinsically safe frequency converter and an electrical detection module; the explosion-proof and intrinsically safe frequency converter is electrically connected to the detection module to detect the gas concentration in the explosion-proof and intrinsically safe inverter box. The way to connect a three-phase motor to an explosion-proof and intrinsically safe frequency converter is as follows: the A phase of the three-phase motor is connected to the A phase motor interface of the explosion-proof and intrinsically safe frequency converter, the B phase of the three-phase motor is connected to the B phase motor interface of the explosion-proof and intrinsically safe frequency converter, and the C phase of the three-phase motor is connected to the C phase motor interface of the explosion-proof and intrinsically safe frequency converter; the explosion-proof and intrinsically safe frequency converter also includes a DC+ / DC- power supply port and an extended WDC+ / WDC- power supply port; when multiple explosion-proof and intrinsically safe inverter boxes are selected, that is, there are multiple explosion-proof and intrinsically safe frequency converters, multiple explosion-proof The explosion-proof and intrinsically safe inverters share an external battery box, in which the DC+ / DC- power port of one explosion-proof and intrinsically safe inverter is directly connected to the external battery box, and the extended WDC+ / WDC- power port of this explosion-proof and intrinsically safe inverter is used to connect with the DC+ / DC- power port of any other explosion-proof and intrinsically safe inverter. According to this rule, the DC+ / DC- power port of any subsequent explosion-proof and intrinsically safe inverter is connected to the extended WDC+ / WDC- power port of the next explosion-proof and intrinsically safe inverter.

[0025] The principle of the utility model is:

[0026] During use, you only need to select the required number of explosion-proof intrinsically safe inverters according to the number of three-phase motors, that is, the number of explosion-proof and intrinsically safe inverter boxes;

[0027] The regulations for connecting three-phase motors to explosion-proof intrinsically safe inverters are as follows: the A phase of the three-phase motor is connected to the A phase motor interface of the explosion-proof and intrinsically safe inverter, the B phase of the three-phase motor is connected to the B phase motor interface of the explosion-proof and intrinsically safe inverter, and the C phase of the three-phase motor is connected to the C phase motor interface of the explosion-proof and intrinsically safe inverter;

[0028] If there are multiple explosion-proof intrinsically safe inverters, that is, multiple explosion-proof and intrinsically safe inverter boxes are selected, only one of the explosion-proof and intrinsically safe inverters needs to be connected to the power supply, which is an external battery. The DC+ / DC- power port of the next explosion-proof and intrinsically safe inverter is connected to the extended WDC+ / WDC- power port of this explosion-proof and intrinsically safe inverter. If more than two explosion-proof and intrinsically safe inverters are needed, the same applies.

[0029] At the same time, the explosion-proof and intrinsically safe inverter boxes are connected to the intrinsically safe control box through their own CAN buses.

[0030] The above embodiments are only used to illustrate the technical method of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical method of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the utility model.

Claims

1. A working condition locomotive speed control system, characterized in that: Includes an intrinsically safe control box and at least one explosion-proof and intrinsically safe inverter box; The intrinsically safe control box and the explosion-proof and intrinsically safe inverter box are connected in series or in parallel; The explosion-proof and intrinsically safe inverter box includes at least one explosion-proof and intrinsically safe frequency converter; The explosion-proof and intrinsically safe frequency converter is connected to at least one three-phase motor; The explosion-proof and intrinsically safe frequency converter is also connected in series with an external power supply.

2. The working condition locomotive speed control system according to claim 1 is characterized in that: The intrinsically safe control box includes at least one intrinsically safe controller; The intrinsically safe controller is connected in series or in parallel with an explosion-proof and intrinsically safe frequency converter.

3. The working condition locomotive speed control system according to claim 2 is characterized in that: The intrinsically safe controller is also connected to wireless synchronous communication, unmanned driving communication and display screen.

4. The working condition locomotive speed control system according to claim 1 is characterized in that: The explosion-proof and intrinsically safe frequency converter is electrically connected to the detection module.

5. The working condition locomotive speed control system according to claim 1 is characterized in that: The explosion-proof and intrinsically safe frequency converter is connected to at least one three-phase motor in the following manner: the A phase of the three-phase motor is connected to the A phase motor interface of the explosion-proof and intrinsically safe frequency converter, the B phase of the three-phase motor is connected to the B phase motor interface of the explosion-proof and intrinsically safe frequency converter, and the C phase of the three-phase motor is connected to the C phase motor interface of the explosion-proof and intrinsically safe frequency converter.

6. The working condition locomotive speed control system according to claim 1, characterized in that: The explosion-proof and intrinsically safe inverter also includes a DC+ / DC- power port and an extended WDC+ / WDC- power port; When multiple explosion-proof and intrinsically safe inverter boxes are selected, there are multiple explosion-proof and intrinsically safe inverters, and the multiple explosion-proof and intrinsically safe inverters share an external battery box, in which the DC+ / DC- power port of one explosion-proof and intrinsically safe inverter is directly connected to the external battery box, and the extended WDC+ / WDC- power port of this explosion-proof and intrinsically safe inverter is used to connect with the DC+ / DC- power port of any other explosion-proof and intrinsically safe inverter. According to this rule, the DC+ / DC- power port of any subsequent explosion-proof and intrinsically safe inverter is connected to the extended WDC+ / WDC- power port of the next explosion-proof and intrinsically safe inverter.

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