Loading resistance box suitable for various voltage classes

Abstract

The utility model provides a loading resistor box suitable for various voltage classes. The loading resistor box comprises a control cabinet and a resistor box, the resistor box comprises a plurality of resistor modules which are connected in parallel; the control cabinet comprises a main copper bar, relays and contactors, and the relays, the contactors and the resistor modules are the same in number; the main copper bar is connected with the input end of a main contact of the contactor, the relay is connected with a coil of the contactor, the output end of the main contact of the contactor is connected with the resistor module, and the relay, the contactor and the resistor module are in one-to-one correspondence; wherein under the condition that the direct-current generator is connected to the main copper bar, the relay is suitable for controlling closing of a main contact of the contactor by controlling electrification of a coil of the contactor corresponding to the relay, so that the direct-current generator is connected to the resistance module meeting the loading requirement.

Description

Technical Field

[0001] This utility model relates to the field of resistance box technology and the field of aircraft generator loading technology, and in particular to a loading resistance box suitable for multiple voltage levels. Background Technology

[0002] Aircraft generators come in different models, each with varying power and voltage ratings. Traditional loading resistor boxes are ill-suited for testing different aircraft generators under varying load conditions. In developing this invention, it was discovered that performing load tests on different aircraft generator models requires multiple loading resistor boxes that meet different voltage levels, which increases the cost of conducting load tests at various voltage levels. Utility Model Content

[0003] In view of this, the present invention provides a loading resistor box suitable for multiple voltage levels, comprising:

[0004] Control cabinets and resistor boxes;

[0005] The resistor box described above includes multiple resistor modules connected in parallel.

[0006] The control cabinet includes a main copper busbar, relays and contactors, wherein the number of relays and contactors is the same as the number of resistor modules.

[0007] The main copper busbar is connected to the input terminal of the main contact of the contactor, the relay is connected to the coil of the contactor, and the output terminal of the main contact of the contactor is connected to the resistor module. The relay, the contactor, and the resistor module are in one-to-one correspondence.

[0008] In the case where the DC generator is connected to the main copper busbar, the relay is adapted to control the closure of the main contacts of the contactor by controlling the energization of the coil of the contactor corresponding to the relay, so that the DC generator can be connected to a resistor module that meets the load requirements.

[0009] According to an embodiment of the present invention, the resistance value of the resistor module represents the resistance level corresponding to the resistor module; the relay, the contactor, and the resistor module constitute a range circuit, which is applicable to the DC generator for resistance loading by connecting to the resistance level corresponding to the range circuit.

[0010] According to an embodiment of the present invention, a fuse is also connected between the main copper busbar and the contactor to protect the branch circuit.

[0011] According to an embodiment of the present invention, a fan and a ventilation hole are provided at the bottom of the loading resistor box, and an exhaust fan is provided at the top of the loading resistor box; the fan, the ventilation hole and the exhaust fan are suitable for ventilation and heat dissipation of the resistor module.

[0012] According to an embodiment of this utility model, the above-mentioned loading resistor box is suitable for voltage levels of DC 0V~600V.

[0013] According to an embodiment of the present invention, the resistor module includes at least one resistor component, which is resistant to a DC voltage of 600V.

[0014] According to an embodiment of the present invention, the current range of the resistor module corresponds to the voltage level, and the current value flowing through the resistor module is used to indicate the current range of the resistor module.

[0015] According to an embodiment of this utility model, when the above-mentioned loading resistor box is connected to a DC generator of different voltage levels, the current level of the above-mentioned resistor module is different.

[0016] According to an embodiment of the present invention, when the above-mentioned loading resistor box is connected to a DC generator of different voltage levels, the above-mentioned loading resistor box is suitable for loading the DC generator with current within different ranges.

[0017] According to an embodiment of the present invention, the sum of the current values ​​of the current ranges corresponding to the current ranges of the resistor module that meet the above-mentioned loading requirements is equal to the current value corresponding to the loading requirements of the DC generator.

[0018] According to the present invention, a loading resistor box suitable for multiple voltage levels is provided. The resistor box includes multiple resistor modules, so that different resistor modules can be selected and connected to meet the loading requirements of DC generators of different voltage levels. Thus, the loading resistor box of the present invention can be compatible with loading tests of multiple voltage levels. Furthermore, since the resistor modules are reusable, compared with loading resistor boxes that are set up separately for loading tests of multiple voltage levels, the footprint of the loading resistor box is effectively reduced, and the cost of carrying out loading tests of multiple voltage levels is also reduced. Attached Figure Description

[0019] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the present invention with reference to the accompanying drawings, in which:

[0020] Figure 1 A schematic front view of the loaded resistor box according to the present invention is shown;

[0021] Figure 2A schematic front view of the loaded resistor box according to the present invention is shown without doors.

[0022] Figure 3 A doorless back view of the loaded resistor box according to the present invention is shown schematically;

[0023] Figure 4 The schematic diagram illustrates the connection diagrams of some relays and contactors, and contactors and resistor modules according to the present invention.

[0024] Figure 5 A schematic diagram of a grading circuit according to the present invention is shown. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0026] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. The terms “comprising,” “including,” etc., as used herein indicate the presence of the stated features, steps, operations, and / or components, but do not exclude the presence or addition of one or more other features, steps, operations, or components.

[0027] All terms used herein, including technical and scientific terms, have the meanings commonly understood by those skilled in the art, unless otherwise defined. It should be noted that the terms used herein are to be interpreted in a manner consistent with the context of this specification, and not in an idealized or overly rigid way.

[0028] When using expressions such as "at least one of A, B, and C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, and C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C. Similarly, when using expressions such as "at least one of A, B, or C," the meaning should generally be interpreted according to the understanding of someone skilled in the art. For example, "a system having at least one of A, B, or C" should include, but is not limited to, systems having A alone, having B alone, having C alone, having A and B, having A and C, having B and C, and / or having A, B, and C.

[0029] It should also be noted that the directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," and "right," are only for reference in the accompanying drawings and are not intended to limit the scope of protection of this utility model. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted where they may cause confusion in understanding this utility model.

[0030] The loading resistance box is difficult to apply to different aircraft generator loading tests, which increases the difficulty of conducting loading tests at multiple voltage levels and also increases the cost of loading tests at multiple voltage levels to some extent.

[0031] Therefore, this utility model proposes a loading resistor box suitable for multiple voltage levels. The loading resistor box includes: a control cabinet and a resistor box; the resistor box includes multiple resistor modules connected in parallel; the control cabinet includes a main copper busbar, relays and contactors, wherein the number of relays, contactors and resistor modules is the same; the main copper busbar is connected to the input terminal of the main contact of the contactor, the relay is connected to the coil of the contactor, and the output terminal of the main contact of the contactor is connected to the resistor module, wherein the relay, contactor and resistor module are in one-to-one correspondence.

[0032] In the case where the DC generator is connected to the main copper busbar, the relay is suitable for controlling the energization of the coil of the contactor corresponding to the relay to control the closing of the main contacts of the contactor, so that the DC generator can be connected to the resistor module that meets the load requirements.

[0033] According to an embodiment of this utility model, the DC generator includes generators of various voltage levels, and DC generators of different voltage levels have different load requirements. Therefore, based on the voltage level and load requirements of the DC generator, control commands can be determined. By sending the control commands to at least one corresponding relay, the at least one relay controls the energization of the coil of the contactor connected to each relay, thereby controlling the closing of the main contacts of the corresponding contactor, so that the DC generator can be connected to a resistor module that meets the load requirements.

[0034] Among them, the DC generator can be connected to the main copper busbar by bolts; the DC generator can be an aircraft generator.

[0035] According to an embodiment of this utility model, the resistor box includes multiple resistor modules, so that different resistor modules can be selected and connected to meet the loading requirements of DC generators of different voltage levels. Thus, the loading resistor box of this utility model can be compatible with loading tests of multiple voltage levels. Furthermore, since the resistor modules are reusable, compared with loading resistor boxes that are set up separately for loading tests of multiple voltage levels, the footprint of the loading resistor box is effectively reduced, and the cost of carrying out loading tests of multiple voltage levels is also reduced.

[0036] According to an embodiment of the present invention, a fan and ventilation holes are provided at the bottom of the loading resistor box, and an exhaust fan is provided at the top of the loading resistor box; the fan, ventilation holes and exhaust fan are suitable for ventilation and heat dissipation of the resistor module.

[0037] Figure 1 A schematic front view of the loaded resistor box according to the present invention is shown.

[0038] like Figure 1 As shown, the loading resistor box of this utility model may include a control cabinet 1 and multiple resistor boxes 2, wherein, Figure 1 The number of resistor boxes shown is for illustrative purposes only; the load resistor box includes one control cabinet and four resistor boxes.

[0039] According to an embodiment of the present invention, both the control cabinet 1 and the resistor box 2 of the load resistor box are provided with ventilation holes 4 at the bottom, and both the control cabinet 1 and the resistor box 2 are provided with exhaust fans 3 at the top.

[0040] Figure 2 A schematic front view of the loaded resistor box according to the present invention is shown without doors.

[0041] According to an embodiment of the present invention, Figure 1 The image shows a front view of the load resistor box. The load resistor box is enclosed, meaning that both control cabinet 1 and resistor box 2 have doors. Figure 2 The image shown is a gateless front view of the loaded resistor box. Figure 1 The front door of the load resistor box shown has been removed to reveal the... Figure 1 The front view of the resistance box shown corresponds to the internal view.

[0042] like Figure 2 As shown, a fan 5 is also provided at the bottom of the resistor box 2 of the load resistor box.

[0043] According to an embodiment of the present invention, since the loading resistor box includes multiple resistor modules, the resistor modules will generate heat during the loading test when the DC generator is connected to the resistor modules. Therefore, the loading resistor box is provided with an exhaust fan 3, a ventilation hole 4 and a fan 5 to facilitate ventilation of the loading resistor box, thereby helping the resistor modules to dissipate heat.

[0044] like Figure 2 As shown, the control cabinet 1 of the load resistor box of this utility model may include a main copper busbar 210, relays, and contactors 220. Multiple relays can be encapsulated in a module 240.

[0045] According to an embodiment of this utility model, the resistance value of the resistor module represents the resistance level corresponding to the resistor module; the relay, contactor, and resistor module constitute a range circuit, which is suitable for DC generators to perform resistance loading by connecting to the resistance level corresponding to the range circuit.

[0046] According to an embodiment of the present invention, the resistance values ​​of different resistor modules in the loading resistor box are also different. The resistance value of the resistor module can be used to represent the resistance level corresponding to the resistor module. For example, if the resistance value of a resistor module is 27Ω, then the resistance level corresponding to the resistor module can be represented as 27.

[0047] According to an embodiment of this utility model, in the load resistor box, a relay, a contactor, and a resistor module can form a graded circuit, that is, the relay and contactor control whether the DC generator can be connected to the corresponding resistor module.

[0048] According to an embodiment of this utility model, the graded circuit is applicable to selecting different resistor modules to connect to a DC generator, that is, by changing the resistor grade selected to connect to the DC generator, the resistance of the DC generator can be loaded.

[0049] According to an embodiment of this utility model, a fuse is also connected between the main copper busbar and the contactor to protect the branch circuit.

[0050] like Figure 2 As shown, in the control cabinet 1 of this utility model, a fuse 230 is also connected between the main copper busbar 210 and the contactor 220.

[0051] According to an embodiment of the present invention, a fuse 230 is provided between the main copper busbar 210 and the contactor 220, which can be used to protect the branch circuit and prevent damage to the device.

[0052] According to an embodiment of this utility model, the loading resistor box is suitable for DC voltage levels of 0V to 600V.

[0053] According to an embodiment of the present invention, the resistor module includes at least one resistor element, which is resistant to a DC voltage of 600V.

[0054] According to an embodiment of the present invention, a resistor module may include at least one resistor component to form a resistor module with the desired resistance value.

[0055] exist Figure 2 In the resistor box 2, multiple resistor components 250 may be included, and at least one resistor component 250 may constitute a resistor module.

[0056] According to an embodiment of the present invention, based on multiple resistor modules with different resistance values ​​in the loading resistor box, the loading resistor box can be applied to DC voltage levels of 0V to 600V. The resistor components in the loading resistor box need to withstand a DC voltage of 600V, and other components in the loading resistor box also need to withstand a DC voltage of 600V.

[0057] According to an embodiment of this utility model, the loading resistor box is applicable to DC 0V~600V. Thus, the loading resistor box of this utility model can be used to perform loading tests on voltage levels within the range of DC 0V~600V. At the same time, in order to avoid damage to the components during the loading test of voltage levels within the range of DC 0V~600V, the resistive components in the loading resistor box need to withstand a DC voltage of 600V.

[0058] Figure 3 A doorless back view of the loaded resistor box according to the present invention is shown schematically.

[0059] like Figure 3 The image shown is a doorless back view of the loaded resistor box, which is also... Figure 1 The rear door of the load resistor box shown has been removed to reveal the connection with... Figure 2 The rear internal view corresponding to the doorless front view of the loaded resistor box shown.

[0060] Figure 4 The diagram illustrates the connection between some relays and contactors, and between contactors and resistor modules according to the present invention.

[0061] like Figure 4 As shown, KA1~KA15 can represent a portion of relays, KM1~KM15 can represent a portion of contactor coils, and KM1'~KM15' can represent a portion of contactor main contacts.

[0062] According to embodiments of the present invention, such as Figure 4 As shown, the relay is connected to the coil of the contactor, and the main contacts of the contactor are connected to the resistor module.

[0063] Here, "connecting the main power generation circuit" refers to the DC generator being connected to the contactor via the main copper busbar; DC24V refers to the voltage supplied to the relay.

[0064] Figure 5 A schematic diagram of a grading circuit according to the present invention is shown.

[0065] like Figure 5 As shown, a grading circuit is formed by a relay KA1, a contactor, and a resistor module 1.

[0066] According to an embodiment of this utility model, a DC generator is connected to the main copper busbar, and a contactor is also connected to the main copper busbar. The main contacts of the contactor are connected to the resistor module, and a relay is connected to the coil of the contactor. The relay KA1 can control the closure of the main contacts KM1' of the contactor by controlling the coil KM1 of the contactor corresponding to the relay KA1, so that the DC generator can be connected to the resistor module 1.

[0067] The DC generator is connected to each of the graded circuits in the load resistor box, and the graded circuits are connected in parallel. The relays and contactors in the graded circuits enable the DC generator to connect to different resistor modules.

[0068] According to an embodiment of the present invention, the current range of the resistor module corresponds to the voltage level, and the current value flowing through the resistor module is used to indicate the current range of the resistor module.

[0069] According to an embodiment of this utility model, the current value flowing through the resistor module can be used to represent the current rating of the resistor module. For example, at a voltage level of 27V, a 27Ω resistor module has a current value of 1A flowing through it, so the current rating of the resistor module can be represented as 1.

[0070] According to embodiments of this utility model, when the load resistor box is connected to a DC generator of different voltage levels, the current level of the resistor module is different.

[0071] According to an embodiment of this utility model, when DC generators of different voltage levels are connected to a load resistor box, since the resistance value of the resistor module remains unchanged, but the voltage applied to both ends of the resistor module varies with the voltage level of the DC generator, the current rating of the resistor module is different at different voltage levels.

[0072] For example, for a 27Ω resistor module, the current setting is 1 when the voltage level is 27V, and 10 when the voltage level is 270V.

[0073] According to an embodiment of the present invention, the resistance settings of the loading resistor box, as well as the current settings and power at voltage levels of 27V, 270V and 540V, can be as shown in Table 1.

[0074] Table 1

[0075]

[0076] Since the use of resistor modules requires a certain power level, the current range not listed in Table 1 indicates that the power of the resistor module exceeds the limit at that voltage level and cannot be used under this voltage condition.

[0077] According to an embodiment of this utility model, when the loading resistor box is connected to a DC generator with different voltage levels, the loading resistor box is suitable for loading current onto the DC generator within different ranges.

[0078] According to an embodiment of this utility model, the resistance loading box is suitable for simultaneously applying resistance loading to a DC generator, that is, applying current loading to the DC generator. For example, the current setting of a 27Ω resistor module is 1, and the current setting of a 13.5Ω resistor module is 2. Therefore, when the DC generator is connected to the 27Ω and 13.5Ω resistor modules for resistance loading, current loading of 1 and 2 is also applied to the DC generator.

[0079] According to embodiments of this utility model, when the loading resistor box is connected to DC generators of different voltage levels, in order to meet the loading requirements of different DC generators, the loading resistor box is suitable for loading current onto DC generators within different ranges.

[0080] Based on Table 1 above, for a voltage level of 27V, the loading resistor box is suitable for loading a DC generator with a current range of 1~420A; for a voltage level of 270V, the loading resistor box is suitable for loading a DC generator with a current range of 1~928A; and for a voltage level of 540V, the loading resistor box is suitable for loading a DC generator with a current range of 1~905A.

[0081] According to an embodiment of this utility model, the resistor module in the loading resistor box has different current levels corresponding to different voltage levels. Therefore, when the loading resistor box is connected to a DC generator with different voltage levels, the loading resistor box is suitable for loading the DC generator with current within different ranges. Thus, through the loading resistor box, the DC generator can be subjected to current loading tests within different ranges.

[0082] According to an embodiment of this utility model, the sum of the current values ​​corresponding to the current range of the resistor module that meets the loading requirements is equal to the current value corresponding to the loading requirements of the DC generator.

[0083] According to an embodiment of this utility model, for a DC generator of a certain voltage level, based on the load requirement corresponding to the DC generator, a corresponding relay control command can be given so that the relay controls the energization of the coil of the contactor corresponding to the relay to control the closing of the main contacts of the contactor, so that the DC generator is connected to a resistor module that meets the load requirement, that is, the sum of the current values ​​represented by the current range of the resistor module that meets the load requirement is equal to the current value corresponding to the load requirement of the DC generator.

[0084] For example, for a DC generator with a voltage level of 27V, the load requirement of the DC generator is 150A. Therefore, a relay control command can be given to the resistor module with a current range of 75A. The relay controls the energization of the coil of the contactor corresponding to the relay to control the closing of the main contacts of the contactor, so that the DC generator can be connected to the corresponding resistor module.

[0085] According to an embodiment of this utility model, the sum of the current values ​​represented by the current ranges of the resistor modules that meet the loading requirements is equal to the current value corresponding to the loading requirements of the DC generator. Therefore, different resistor modules can be selected to connect to the DC generator according to the different loading requirements of the DC generator, so as to realize the current loading test of the DC generator.

[0086] Based on Table 1, current ranges 1, 2, 4, 8, 16, 32, and 64 are designated as the main ranges, while the remaining current ranges are designated as available ranges. The current range of each resistor module is an available range, meaning that the corresponding available range is selected based on the voltage level and load requirements of the DC generator, so that the DC generator can be connected to a resistor module that meets the load requirements.

[0087] Taking the three voltage levels commonly used in aircraft generators—DC27V, DC270V, and DC540V—as examples, under each voltage level loading condition, the main gear positions 1, 2, 4, 8, 16, 32, and 64 can be selected first, and then each available gear position can be selected to meet the resistance loading of DC27V, 420A; DC270V, 928A; and DC540V, 905A respectively, thus satisfying the loading test of most aircraft DC generators.

[0088] Compared with existing loading resistor boxes, the loading resistor box of this utility model can be compatible with DC loading tests of multiple voltage levels; since the resistor components adopt a modular combination method, it can meet the current loading within a certain range; all resistor modules can be reused, representing different current levels at different voltage levels; reusing resistor modules can effectively reduce the footprint of the loading resistor box; and reduce the investment cost for loading tests of multiple voltage levels.

[0089] Therefore, compared with existing loading resistor boxes, the loading resistor box of this utility model has significant advantages in terms of cost, versatility, and effectiveness. With a DC0V~600V universal loading resistor box, it can meet the loading test requirements of various aviation DC generators, and has better practicality and economy.

[0090] The embodiments of the present invention have been described above. However, these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination. The scope of the present invention is defined by the appended claims and their equivalents. Various substitutions and modifications can be made by those skilled in the art without departing from the scope of the present invention, and all such substitutions and modifications should fall within the scope of the present invention.

Claims

1. A loading resistor box suitable for multiple voltage levels, characterized in that, include: Control cabinets and resistor boxes; The resistor box includes multiple resistor modules connected in parallel; The control cabinet includes a main copper busbar, relays, and contactors, wherein the number of relays and contactors is the same as the number of resistor modules; The main copper busbar is connected to the input terminal of the main contact of the contactor, the relay is connected to the coil of the contactor, and the output terminal of the main contact of the contactor is connected to the resistor module. The relay, the contactor, and the resistor module are in one-to-one correspondence. In the case where the DC generator is connected to the main copper busbar, the relay is adapted to control the closure of the main contacts of the contactor by controlling the energization of the coil of the contactor corresponding to the relay, so that the DC generator can be connected to a resistor module that meets the loading requirements.

2. The loading resistor box according to claim 1, characterized in that, The resistance value of the resistor module represents the resistance level corresponding to the resistor module; the relay, the contactor, and the resistor module constitute a range circuit, which is suitable for the DC generator to perform resistance loading by connecting to the resistance level corresponding to the range circuit.

3. The loading resistor box according to claim 2, characterized in that, A fuse is also connected between the main copper busbar and the contactor to protect the branch circuit.

4. The loading resistor box according to claim 1, characterized in that, The bottom of the loading resistor box is equipped with a fan and ventilation holes, and the top of the loading resistor box is equipped with an exhaust fan; the fan, the ventilation holes and the exhaust fan are used for ventilation and heat dissipation of the resistor module.

5. The loading resistor box according to claim 1, characterized in that, The loading resistor box is suitable for DC voltage levels from 0V to 600V.

6. The loading resistor box according to claim 5, characterized in that, The resistor module includes at least one resistor component, which is resistant to a DC voltage of 600V.

7. The loading resistor box according to claim 5, characterized in that, The current range of the resistor module corresponds to the voltage level, and the current value flowing through the resistor module is used to indicate the current range of the resistor module.

8. The loading resistor box according to claim 7, characterized in that, When the loading resistor box is connected to DC generators of different voltage levels, the current rating of the resistor module will be different.

9. The loading resistor box according to claim 8, characterized in that, When the loading resistor box is connected to DC generators of different voltage levels, the loading resistor box is suitable for loading current onto the DC generator within different ranges.

10. The loading resistor box according to any one of claims 1 to 9, characterized in that, The sum of the current values ​​corresponding to the current settings of the resistor modules that meet the loading requirements is equal to the current value corresponding to the loading requirements of the DC generator.

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