A motor testing device

Abstract

This utility model proposes a motor testing device. The device includes: a first frequency converter, a first transformer, a first switch cabinet, a second transformer, and a second switch cabinet; wherein the first transformer is a three-channel transformer; the motor test power supply is frequency-converted by the frequency converter, then transformed by the first transformer into power supplies of first, second, and third voltage levels, and then passes through the first and second switch cabinets according to power channels determined by received instructions. The power channels include a first power channel and a second power channel; wherein the first power channel outputs one of the first, second, and third voltage levels, and the second power channel outputs the third voltage level power supply, which is then transformed by the second transformer to obtain a fourth voltage level power supply. The technical solution in this utility model embodiment can enrich the voltage levels for motor testing, increase the testing range, and improve testing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of rail transit, and in particular to a motor testing device. Background Technology

[0002] When testing motors in rail transit systems, different motors require different voltages and frequencies of test power supplies. Summary of the Invention

[0003] To achieve the above objectives, this utility model proposes a motor testing device to enrich the voltage levels for motor testing, increase the testing range, and improve testing efficiency.

[0004] This utility model discloses a motor testing device comprising: a first frequency converter, a first transformer, a first switch cabinet, a second transformer, and a second switch cabinet; wherein the first transformer is a three-channel transformer; the motor test power supply is frequency-converted by the frequency converter, then transformed by the first transformer into power supplies of first, second, and third voltage levels, and then passes through the first and second switch cabinets according to power channels determined by received instructions. The power channels include a first power channel and a second power channel; wherein the first power channel outputs one of the first, second, and third voltage levels, and the second power channel outputs the third voltage level power supply transformed by the second transformer to obtain a fourth voltage level power supply. This device can enrich the voltage levels for motor testing, increase the testing range, and improve testing efficiency. Attached Figure Description

[0005] The accompanying drawings are intended only to illustrate and explain the present invention and do not limit the scope of the present invention.

[0006] in,

[0007] Figure 1 This is a structural diagram of a motor testing device according to an embodiment of the present invention.

[0008] The annotations in the attached figures are explained as follows:

[0009]

[0010] Detailed Implementation

[0011] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model are now described with reference to the accompanying drawings.

[0012] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein, and therefore the present invention is not limited to the specific embodiments disclosed below.

[0013] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "an," and / or "the" are not specifically singular and may include plural forms. Generally speaking, the terms "comprising" and "including" only indicate the inclusion of explicitly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements.

[0014] To provide a more effective motor testing device.

[0015] like Figure 1 As shown, a motor testing device includes:

[0016] The system comprises a first frequency converter 101, a first transformer 102, a first switch cabinet 103, a second transformer 104, and a second switch cabinet 105; wherein the first transformer 102 is a three-channel transformer.

[0017] The motor test power supply is frequency-converted by the frequency converter 101, and then transformed into power supplies of the first, second, and third voltage levels by the first transformer 102. The power supplies then pass through the first switch cabinet 103 and the second switch cabinet 105 according to the power supply channels determined by the received instructions. The power supply channels include a first power supply channel and a second power supply channel. The first power supply channel outputs one of the first, second, and third voltage levels of power supply, and the second power supply channel outputs the third voltage level power supply and then transforms it through the second transformer 104 to obtain the fourth voltage level power supply.

[0018] In one embodiment, the first switch cabinet 103 is used to switch the output channels of a three-phase circuit breaker, outputting three voltage levels of power and serving as a first grounding switch.

[0019] In one embodiment, the first switch cabinet 103 and the second switch cabinet 105 receive control commands from the PLC unit to adjust the switch closing state and switch the power channel.

[0020] In one embodiment, the second switch cabinet is provided with a second grounding switch, which operates synchronously with the first grounding switch.

[0021] In one embodiment, the first switch cabinet is provided with a power input switch for controlling whether the motor test power supply is connected to the device.

[0022] In one embodiment, the second switch cabinet is further provided with a second frequency converter switch, which, when closed, converts the power output from the first power channel or the second power channel into frequency by the second frequency converter 106 before outputting.

[0023] Specifically, the power supply switch of the frequency converter 101 can be CB1, the three-phase circuit breaker used to switch the power supply of three voltage levels can be CB2, CB3 and CB4, and the first grounding switch can be CB5; the switch in the second switch cabinet 105 corresponding to the first power channel can be C3, and the switch corresponding to the second power channel can be C2 and DC1, which are located at the input and output terminals of the second transformer 104 respectively; the second grounding switch can be DC2, and the second frequency converter switch can be DC3.

[0024] Specifically, the motor test power supply can be 400V 3AC. After passing through the first transformer, it can output 200V / 600V / 900V. The 900V power supply, after passing through the second transformer, can output 1500V. Therefore, before selecting a channel, the grounding switch CB5 and DC2 can be opened first. When a 3AC 200V output voltage is required, switches CB1, CB2, and C3 can be closed. When a 3AC 600V output voltage is required, switches CB1, CB3, and C3 can be closed. When a 3AC 900V output voltage is required, switches CB1, CB4, and C3 can be closed. When a 3AC 1500V output voltage is required, switches CB1, CB4, C2, and DC1 can be closed. When a second frequency converter is required, switch DC3 can be closed.

[0025] Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of this invention and are not intended to limit the scope of protection of this invention. Without departing from the principles of this invention, those skilled in the art can make adjustments as needed to adapt to specific applications.

[0026] It should be noted that in the description of this utility model, terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0028] The directional terms used in this article, such as "front," "front side," "front part," "rear," "rear side," and "rear part," are all based on the front-rear direction of the vehicle after the component is installed. The terms "longitudinal," "longitudinal direction," and "longitudinal section" mentioned in this article are based on the front-rear direction after the component is installed in the vehicle, while "transverse," "lateral," and "cross section" indicate the direction perpendicular to the longitudinal direction.

[0029] It should be understood that although this specification is described according to various embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0030] The above description is merely an illustrative embodiment of this utility model and is not intended to limit the scope of this utility model. Any equivalent changes, modifications, and combinations made by those skilled in the art without departing from the concept and principles of this utility model should fall within the protection scope of this utility model.

Claims

1. A motor testing device (100), characterized in that, The device includes: The system comprises a first frequency converter (101), a first transformer (102), a first switchgear (103), a second transformer (104), and a second switchgear (105); wherein the first transformer (102) is a three-channel transformer. After the motor test power supply is frequency-converted by the frequency converter (101), it is transformed into power supplies of the first, second and third voltage levels by the first transformer (102), and then passed through the first switch cabinet and the second switch cabinet (105) according to the power supply channel determined by the received instruction. The power supply channel includes the first power supply channel and the second power supply channel. The first power supply channel outputs one of the first, second and third voltage levels of power supply, and the second power supply channel outputs the third voltage level of power supply and obtains the fourth voltage level of power supply after being transformed by the second transformer (104).

2. The device according to claim 1, characterized in that, The first switch cabinet (103) is used to switch the output channels of the three-phase circuit breaker, outputting three voltage levels of power and serving as the first grounding switch.

3. The device according to claim 1, characterized in that, The first switch cabinet (103) and the second switch cabinet (105) receive control commands from the PLC unit to adjust the switch closing state and switch the power supply channel.

4. The device according to claim 1, characterized in that, The second switch cabinet is equipped with a second grounding switch, which operates synchronously with the first grounding switch.

5. The device according to claim 1, characterized in that, The first switch cabinet is equipped with a power input switch, which is used to control whether the motor test power is connected to the equipment.

6. The device according to claim 1, characterized in that, The second switch cabinet is also equipped with a second frequency converter switch. When closed, the power output from the first power channel or the second power channel is converted by the second frequency converter (106) and then output.

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