CN219067851U

CN219067851U - Operating lever and main contactor protection device based on same

Info

Publication number: CN219067851U
Application number: CN202222873114.XU
Authority: CN
Inventors: 王鹏; 高慧; 李德鹏
Original assignee: Jiangsu Aiqu New Energy Technology Co ltd
Current assignee: Jiangsu Aiqu New Energy Technology Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-05-23
Anticipated expiration: 2032-10-28

Abstract

The utility model belongs to the technical field of control systems of pure electric double-power subway tractors, and provides an operating lever and a main contactor protection device based on the operating lever, wherein the operating lever comprises: the double-position relay is connected with the BMS system and comprises a first output end and a second output end; the mechanical stop lever body is electrically connected with the two-position relay, and the mechanical stop lever body comprises a neutral gear contact and a plurality of operation gear contacts, wherein the neutral gear contact and the operation gear contacts are electrically connected with the first output end, and the neutral gear contact is electrically connected with the second output end. The operating lever comprises the double-position relay, when the BMS normally operates, the first output end of the double-position relay is communicated with all gear contacts, the mechanical stop lever body outputs signals according to actual gears, when the BMS fails, the BMS outputs high-level signals, the double-position relay is communicated with the neutral gear contacts, the mechanical stop lever body outputs neutral gear signals, and the problem of main connection adhesion under the condition of high current breaking and high voltage of the main contactor is avoided.

Description

Operating lever and main contactor protection device based on same

Technical Field

The utility model relates to the technical field of control systems of pure electric double-power subway tractors, in particular to an operating rod and a main contactor protection device based on the operating rod.

Background

At present, all parts of a subway tractor do not communicate with each other, any part does not work, other parts cannot sense, the reliability of a system is poor, particularly, a battery fault occurs in the operation process of the tractor, the BMS needs to break high voltage to ensure that the parts are not damaged or the safety problem does not occur, and under the condition that high current breaks high voltage, a main contactor frequently generates a main connection adhesion fault.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides an operating rod and a main contactor protection device based on the operating rod, so as to solve the problem that the main contactor is adhered under the condition of high current and high voltage breaking of the main contactor.

In a first aspect, the present utility model provides an operation lever, including:

the double-position relay is connected with the BMS system and comprises a first output end and a second output end;

the mechanical stop lever body is electrically connected with the two-position relay, the mechanical stop lever body comprises a neutral gear contact and a plurality of operation gear contacts, the neutral gear contact and the operation gear contacts are electrically connected with the first output end, and the neutral gear contact is electrically connected with the second output end.

According to the technical scheme, the operating lever comprises the double-position relay, when the BMS normally operates, the double-position relay is communicated with all gear contacts, the mechanical stop lever body outputs signals according to actual gears, when the BMS fails, the BMS outputs high-level signals, the double-position relay is communicated with the neutral gear contacts, and the mechanical stop lever body outputs neutral gear signals.

Optionally, the two-position relay further comprises a first input terminal and a second input terminal, the first input terminal is electrically connected with the BMS system, and the second input terminal is connected with a power supply.

Optionally, when the BMS system is in a normal operation state, the two-position relay is communicated with the first output terminal; when the BMS system fails, the BMS system outputs a high-level signal, and the double-position relay is communicated with the second output end.

In a second aspect, the present utility model further provides a protection device for a main contactor, based on the operation lever of any possible implementation manner of the first aspect, further including a power frequency converter, where the power frequency converter is electrically connected to the output end of the mechanical bar body, and the main contactor is connected to the power frequency converter.

Optionally, the power inverter is further connected to a BMS system, which supplies power to the power inverter.

By adopting the technical scheme, the application has the following technical effects:

the utility model provides an operating rod and a main contactor protection device based on the operating rod, wherein under the condition of BMS fault, a two-position relay of the operating rod realizes switching of output signals of the operating rod, a neutral gear signal is output, a power frequency converter stops working, the current of a battery power supply line is reduced, and the battery can close the main contactor under the calibration current to ensure the normal service life of the main contactor.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

Fig. 1 is a schematic block diagram of an operation lever and a main contact protection device based on the operation lever according to an embodiment of the present utility model.

Detailed Description

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is two or more unless specifically defined otherwise.

Example 1

FIG. 1 is a schematic view of a module of an operating lever according to an embodiment of the present utility model; as shown in fig. 1, the operation lever provided in this embodiment includes:

the double-position relay is connected with the BMS system and comprises a first output end and a second output end; the mechanical stop lever body is electrically connected with the two-position relay, and the mechanical stop lever body comprises a neutral gear contact and a plurality of operation gear contacts, wherein the neutral gear contact and the operation gear contacts are electrically connected with the first output end, and the neutral gear contact is electrically connected with the second output end. The operating gear contacts are shown as 5 in fig. 1, corresponding to five gears of an existing tractor, respectively.

The action bars that this embodiment provided, action bars include dual position relay, and when BMS normally operated, the first output intercommunication of dual position relay all keeps off the position contact, and mechanical pin body is according to actual fender position output signal, and BMS output high level signal when BMS trouble, dual position relay intercommunication neutral gear contact, mechanical pin body output neutral gear signal.

The operation lever outputs the following gear according to the driver's operation, see table 1:

TABLE 1

Where x represents a signal.

Optionally, the two-position relay further comprises a first input terminal and a second input terminal, the first input terminal is electrically connected with the BMS system, and the second input terminal is connected with the power supply. Meanwhile, the two-position relay further comprises a grounding end used for grounding.

The double-position relay is based on the existing element, and the working principle is as follows: the relay comprises two coils, each coil is connected in series with a contact, a normally open and a normally closed, when no electricity is applied, the armature is fixed at the initial position through the acting force of the permanent magnet, when the coil with the normally closed contact is powered on, the coil is electrified to enable the armature to act, the armature is fixed at the post-act position through the permanent magnet after the action, meanwhile, the armature acts to enable the positions of the series connection contacts of the two coils to be switched, the original normally closed contact is opened to enable the coil to be powered off, the original normally open contact is closed, and the corresponding coil is in the ready-to-get action. The control power source is mechanically held by the magnet, and therefore, the position thereof is held in a state before the control power source is removed after the control power source is removed. The normally closed contact of the double-position relay in the embodiment is a first output end and is connected with all contacts of the mechanical stop lever body, the normally open contact is a second output end and is connected with the neutral gear contact, when the BMS fails to output high level, the normally closed contact is disconnected, and therefore the operating lever outputs a neutral gear signal.

Optionally, when the BMS system is in a normal operation state, the dual-position relay is communicated with the first output end; when the BMS system fails, the BMS system outputs a high-level signal, and the two-position relay is communicated with the second output end. Based on the dual position relay, gear is determined by the output of the BMS system, and once the BMS fails, neutral gear can be directly output for disconnecting the main contactor.

Example 2

The utility model also provides a main contactor protection device, which is based on the operating rod of the embodiment 1, and further comprises a power frequency converter, wherein the power frequency converter is electrically connected with the output end of the mechanical stop lever body, and the main contactor is connected with the power frequency converter.

Optionally, the power inverter is further connected to a BMS system, which supplies power to the power inverter. The control to the vehicle driving system is realized to the power converter based on the output signal of action bars, mainly is the protection control to the main contactor in this embodiment, and when the action bars output is effective for the neutral gear, the converter stops work, and BMS low current disconnection main contactor's connection.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.

Claims

1. An operating lever, characterized by comprising:

2. The lever of claim 1, wherein the two position relay further comprises a first input and a second input, the first input being electrically connected to the BMS system, the second input being connected to a power supply.

3. The lever of claim 1, wherein the two-position relay communicates with the first output when the BMS system is in a normal operating state; when the BMS system fails, the BMS system outputs a high-level signal, and the double-position relay is communicated with the second output end.

4. A main contactor protection device, characterized in that, based on the operating lever of any one of claims 1-3, it further comprises a power inverter, said power inverter being electrically connected to the output of said mechanical stop lever body, and the main contactor being connected to said power inverter.

5. The primary contactor protection as claimed in claim 4, wherein the power inverter is further connected to a BMS system that powers the power inverter.