Inductance device and double-pulse test equipment

Abstract

The utility model belongs to the technical field of double-pulse testing, and discloses an inductance device and double-pulse testing equipment. The inductance device comprises an inductor body, a conductive part and a driving assembly. The conductive member and at least a portion of the inductor body are arranged in series in an inductive loop. The driving assembly is arranged on the inductor body at intervals, and the conductive part is in transmission connection with the driving assembly and can be driven by the driving assembly to move in the length direction of the inductor body to adjust the contact position of the conductive part and the inductor body so as to adjust the range of the inductor body connected to an inductance loop. The inductance device is suitable for double-pulse testing of various to-be-tested devices with different voltages and currents, the testing cost can be reduced, and the testing efficiency can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of double pulse testing, in particular to an inductance device and double pulse testing equipment. Background Art

[0002] The voltage platform of motor drivers is constantly updated, and there are 400V voltage platform motor drivers, 800V voltage platform motor drivers, and 1200V voltage platform motor drivers. For motor drivers with different voltage platforms, the bus voltage and operating current of the power module are also different. Therefore, in the double pulse test of the motor driver, it is necessary to use a variety of inductors with different inductance values ​​to assist in completing the test for the motor drivers under test with different voltage platforms.

[0003] At present, in most motor drive double pulse tests, testers will make or purchase a special inductor that can only be used for this double pulse test based on the inductance value calculation results. When the bus voltage or operating current of the tested motor drive changes, a new inductor needs to be replaced.

[0004] The above method greatly increases the cost of the double pulse test of the motor driver and reduces the test efficiency.

[0005] Therefore, there is an urgent need for an inductor device and a double pulse test equipment to solve the above problems. Utility Model Content

[0006] According to one aspect of the utility model, an object is to provide an inductor device, which is suitable for double-pulse testing of various devices under test with different voltages and currents, and can reduce testing costs and improve testing efficiency.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] An inductive device comprising:

[0009] Inductor body;

[0010] A conductive member, wherein the conductive member and at least a portion of the inductor body are arranged in series in the inductor loop;

[0011] A driving component is arranged at intervals on the inductor body, and the conductive member is transmission-connected to the driving component. The conductive member can move along the length direction of the inductor body under the drive of the driving component, and adjust the contact position with the inductor body to adjust the range of the inductor body connected to the inductor loop.

[0012] As a preferred solution of the inductor device provided by the utility model, the inductor body includes a current guide chain and a spirally wound wire, the wire forms a plurality of coils along the length direction of the inductor body, the current guide chain is arranged along the length direction of the inductor body, the current guide chain includes a plurality of current guide parts corresponding to and electrically connected to the plurality of coils, and adjacent current guide parts are insulated;

[0013] The conductive member moves along the length direction of the inductor body and can contact any of the guide parts.

[0014] As a preferred solution of the inductor device provided by the utility model, the inductor device also includes a transmission component, which is connected to the drive component and includes a slide rail and a moving block. The slide rail is arranged on one side of the inductor body along the length direction, and the conductive member is arranged on the moving block. The moving block is slidably arranged on the slide rail, and the moving block can slide along the slide rail under the drive of the drive component.

[0015] As a preferred solution of the inductive device provided by the utility model, the inductive device also includes a transmission assembly, which includes a screw, a moving block and a limit member. The screw is connected to the driving assembly and can rotate around its own axis under the drive of the driving assembly. The moving block can be relatively rotatably threadedly connected to the outside of the screw and is connected to the limit member. The moving block moves along the length direction of the screw under the restriction of the limit member.

[0016] As a preferred solution of the inductive device provided by the utility model, the transmission assembly further comprises a bearing base, and an end of the screw rod away from the output end of the driving assembly is rotatably disposed in the bearing base.

[0017] As a preferred embodiment of the inductor device provided by the utility model, the inductor device also includes a first inductor terminal, a second inductor terminal and an elastic wire, the inductor body is electrically connected to the first inductor terminal, the conductive member is electrically connected to the second inductor terminal through the elastic wire, and the first inductor terminal is electrically connected to the second inductor terminal to form the inductor loop.

[0018] As a preferred solution of the inductor device provided by the utility model, the inductor device also includes a controller, which is communicatively connected to the drive component and can control the action of the drive component. The conductive member can move to the target contact position on the inductor body under the action of the controller.

[0019] As a preferred solution of the inductor device provided by the utility model, the inductor device also includes an inductor sensor, which is connected in series in the inductor loop and is communicatively connected to the controller, and the inductor sensor can collect the output inductance signal of the inductor body.

[0020] As a preferred solution of the inductor device provided by the utility model, the inductor device further comprises a device housing, and the inductor body, the conductive member and the driving assembly are all arranged in the device housing.

[0021] According to another aspect of the present invention, an object is to provide a double pulse testing device, wherein the double pulse testing device comprises an inductor device as described in any one of the above schemes.

[0022] Beneficial effects of the utility model:

[0023] The inductor device provided by the utility model includes an inductor body, a conductive part and a driving component. The conductive part and at least a part of the inductor body are arranged in series in an inductor loop. The driving component is arranged at intervals on the inductor body, and the conductive part is transmission-connected to the driving component. It can move along the length direction of the inductor body under the drive of the driving component, and adjust the contact position with the inductor body to adjust the range of the inductor body accessing the inductor loop. In other words, the inductor device can adjust the inductance value of the inductor loop by adjusting the relative position of the conductive part and the inductor body. In the double pulse test of a plurality of devices to be tested with different voltages and currents, there is no need to frequently replace the inductor device, so as to reduce the test cost and improve the test efficiency.

[0024] The double pulse test equipment provided by the utility model can adjust the inductance value by using the inductance device provided by the utility model, so as to be applicable to double pulse tests of various devices to be tested with different voltages and currents, thereby reducing the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of an inductor device provided in an embodiment of the utility model;

[0026] Figure 2 It is a partial schematic diagram of the double pulse testing equipment provided by the embodiment of the utility model.

[0027] In the figure:

[0028] 10. Host computer;

[0029] 100, inductor body; 110, current guide chain; 120, coil;

[0030] 200, conductive parts;

[0031] 300, drive assembly;

[0032] 400, transmission assembly; 410, screw; 420, moving block; 430, bearing base;

[0033] 510, first inductor terminal; 520, second inductor terminal; 530, elastic wire; 540, inductor collection copper bus;

[0034] 600, controller; 610, display screen;

[0035] 700, inductive sensor;

[0036] 800. Device housing. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0038] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] In the description of this embodiment, the terms "upper", "lower", "right", "left" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0041] Figure 1 The schematic diagram of the structure of the inductor device provided by the embodiment of the utility model is shown. Figure 2 A partial schematic diagram of a double pulse test device provided by an embodiment of the utility model is shown. Figure 1 and Figure 2 The present embodiment provides an inductor device and a double pulse test device. The double pulse test device includes the inductor device provided in the present embodiment. The inductor device can assist the double pulse test device in testing a device under test such as a motor driver.

[0042] Specifically, refer to Figure 1 The inductor device includes an inductor body 100, a conductive member 200, a driving assembly 300 and a transmission assembly 400. The conductive member 200 and at least a portion of the inductor body 100 are arranged in series in the inductor loop. The driving assembly 300 is arranged at intervals on the side of the inductor body 100, and the conductive member 200 is connected to the driving assembly 300 through the transmission assembly 400. Driven by the driving assembly 300, the conductive member 200 can move along the length direction of the inductor body 100 to adjust the contact position with the inductor body 100, so as to adjust the range of the part of the inductor body 100 connected to the inductor loop, thereby changing the inductance value of the entire inductor loop.

[0043] It should be noted that when the entire inductor body 100 is connected to the inductor loop, the inductance value of the inductor loop is greater than the commonly used maximum inductance value so as to be adaptable to a variety of double pulse test equipment. In this embodiment, the inductor body 100 can output an inductance value ranging from 0 to 100 μH.

[0044] More specifically, the inductor device further comprises a device housing 800. The inductor body 100, the conductive member 200, the driving assembly 300 and the transmission assembly 400 are all disposed in the device housing 800. The device housing 800 can protect the above components and extend the service life of the inductor device.

[0045] More specifically, the inductor device further includes a first inductor terminal 510, a second inductor terminal 520 and an elastic wire 530. The first inductor terminal 510 and the second inductor terminal 520 are respectively located outside the device housing 800. The inductor body 100 is electrically connected to the first inductor terminal 510, the conductive member 200 is electrically connected to the second inductor terminal 520 through the elastic wire 530, and the first inductor terminal 510 is electrically connected to the second inductor terminal 520 through the inductor collection copper bar 540 to form the inductor loop.

[0046] Continue to refer to Figure 1 The inductor body 100 includes a current guide chain 110 and a spirally wound wire, and the wire forms a plurality of coils 120 along the length direction of the inductor body 100. The first inductor terminal 510 is connected to the coil 120 at the uppermost end. The current guide chain 110 is arranged along the length direction of the inductor body 100, and the current guide chain 110 includes a plurality of current guide parts corresponding to and electrically connected to the plurality of coils 120. Adjacent current guide parts are insulated from each other. In this embodiment, an insulating gasket is arranged between adjacent current guide parts to avoid electrical connection between adjacent current guide parts. The conductive member 200 moves along the length direction of the inductor body 100 and can contact any current guide part. The portion between the coil 120 corresponding to the current guide part contacted by the conductive member 200 and the coil 120 connected to the first inductor terminal 510 is the portion of the inductor body 100 connected to the inductor loop.

[0047] It should be noted that in this embodiment, when the conductive member 200 contacts and moves with the current guide chain 110, the inductance value can be changed with an accuracy interval of 0.1 μH. In other embodiments, the accuracy interval of the inductance value change can also be other values, which is not limited in this embodiment.

[0048] Continue to refer to Figure 1 , the transmission assembly 400 includes a slide rail and a moving block 420. The slide rail is arranged on one side of the inductor body 100 along the length direction, and the slide rail is parallel to the length direction of the inductor body 100. The conductive member 200 is fixedly arranged on the side of the moving block 420 facing the guide chain 110. The moving block 420 is slidably arranged on the slide rail, and the moving block 420 can slide along the slide rail under the drive of the driving assembly 300. The driving assembly 300 can specifically be an electric-controlled hydraulic assembly, etc., and its output end is connected to the moving block 420, which can push the moving block 420 to move along the slide rail.

[0049] In another embodiment, the transmission assembly 400 includes a screw 410 and a moving block 420. The cross section of the screw 410 is circular and is coaxially connected to the rotation output end of the driving assembly 300. The moving block 420 is provided with an internal thread and is relatively rotatably connected to the outside of the screw 410. The screw 410 rotates around its own axis under the drive of the driving assembly 300. The transmission assembly 400 also includes a limiter, and the moving block 420 is slidably connected to the limiter. The moving block 420 can move along the length direction of the screw 410 under the restriction of the limiter and under the rotation of the screw 410. The driving assembly 300 can be a stepping motor or the like.

[0050] Specifically, the transmission assembly 400 further includes a bearing base 430, and one end of the screw rod 410 away from the output end of the driving assembly 300 is rotatably disposed in the bearing base 430. The bearing base 430 can ensure the stability of the rotation of the screw rod 410.

[0051] Continue to refer to Figure 1 The inductor device further includes a controller 600. The controller 600 is communicatively connected to the driving component 300, and can control the action of the driving component 300, and specifically controls the distance that the driving component 300 can drive the conductive member 200 to move, thereby enabling the conductive member 200 to move to the target contact position on the inductor body 100 under the action of the controller 600. The controller 600 can specifically be a single chip microcomputer, etc., and its structure and principle are not described in detail in this embodiment.

[0052] Specifically, the inductance device further includes an inductance sensor 700. The inductance sensor 700 is connected in series in the inductance loop, is specifically arranged on the inductance collection copper bar 540, and is communicatively connected to the controller 600. The inductance sensor 700 can collect the output inductance signal of the inductor body 100, and transmit the output inductance signal to the controller 600, and the controller 600 compares the results. If the inductance value of the inductance circuit does not reach the target inductance value when the conductive member 200 moves to the target contact position due to equipment aging and other problems, the controller 600 can control the driving component 300 again to drive the conductive member 200 to move a suitable distance so that the inductance value of the inductance circuit reaches the target inductance value.

[0053] Reference Figure 1 and Figure 2The double pulse test device also includes a host computer 10. The host computer 10 is communicatively connected to the controller 600 and is used to give the controller 600 an instruction to adjust the inductance value by inputting parameters, wherein the input parameters specifically include voltage value, current value and pulse time. The controller 600 calculates the required target inductance value according to the following formula (1) based on the above parameters such as voltage value, current value and pulse time, and then automatically controls the action of the driving component 300.

[0054] L = Ut / I (1);

[0055] Among them, L is the inductance value, U is the voltage value, I is the current value, and t is the pulse time.

[0056] Reference Figure 2 The controller 600 is communicatively connected to a display screen 610. The display screen 610 can display the current output inductance value, voltage value, current value and pulse time.

[0057] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. An inductive device, characterized in that include: An inductor body (100); A conductive member (200), wherein the conductive member (200) and at least a portion of the inductor body (100) are arranged in series in an inductor loop; A driving component (300) is arranged at intervals on the inductor body (100); the conductive member (200) is drivingly connected to the driving component (300) and can move along the length direction of the inductor body (100) under the drive of the driving component (300) to adjust the contact position with the inductor body (100) so as to adjust the range of the inductor body (100) connected to the inductor loop.

2. The inductive device according to claim 1, characterized in that The inductor body (100) comprises a current guiding chain (110) and a spirally wound conducting wire, wherein the conducting wire forms a plurality of coils (120) along the length direction of the inductor body (100), the current guiding chain (110) is arranged along the length direction of the inductor body (100), the current guiding chain (110) comprises a plurality of current guiding parts corresponding to each other and electrically connected to the plurality of coils (120), and adjacent current guiding parts are insulated from each other; The conductive member (200) moves along the length direction of the inductor body (100) and is capable of contacting any of the guide parts.

3. The inductive device according to claim 1, characterized in that: The inductor device further comprises a transmission component (400), the transmission component (400) being connected to the drive component (300) and comprising a slide rail and a moving block (420), the slide rail being arranged on one side of the inductor body (100) along the length direction, the conductive member (200) being arranged on the moving block (420), the moving block (420) being slidably arranged on the slide rail, and the moving block (420) being able to slide along the slide rail under the drive of the drive component (300).

4. The inductive device according to claim 1, characterized in that The inductive device further comprises a transmission assembly (400), wherein the transmission assembly (400) comprises a screw rod (410), a moving block (420) and a stopper; the screw rod (410) is connected to the driving assembly (300) and can rotate around its own axis under the drive of the driving assembly (300); the moving block (420) is relatively rotatably threadedly connected to the outside of the screw rod (410) and is connected to the stopper; the moving block (420) moves along the length direction of the screw rod (410) under the restriction of the stopper.

5. The inductive device according to claim 4, characterized in that: The transmission assembly (400) further comprises a bearing base (430), and an end of the screw rod (410) away from the output end of the drive assembly (300) is rotatably disposed in the bearing base (430).

6. The inductive device according to claim 1, characterized in that: The inductor device further comprises a first inductor terminal (510), a second inductor terminal (520) and an elastic wire (530); the inductor body (100) is electrically connected to the first inductor terminal (510); the conductive member (200) is electrically connected to the second inductor terminal (520) via the elastic wire (530); and the first inductor terminal (510) is electrically connected to the second inductor terminal (520) to form the inductor loop.

7. The inductive device according to claim 1, characterized in that: The inductor device further comprises a controller (600), wherein the controller (600) is communicatively connected to the driving component (300) and is capable of controlling the operation of the driving component (300), and the conductive member (200) is capable of moving to a target contact position on the inductor body (100) under the action of the controller (600).

8. The inductive device according to claim 7, characterized in that: The inductor device further comprises an inductor sensor (700), the inductor sensor (700) being connected in series in the inductor loop and being communicatively connected to the controller (600), and the inductor sensor (700) being capable of collecting an output inductance signal of the inductor body (100).

9. The inductive device according to any one of claims 1 to 8, characterized in that: The inductor device further comprises a device housing (800), and the inductor body (100), the conductive member (200) and the driving component (300) are all arranged in the device housing (800).

10. Double pulse test equipment, characterized in that, Comprising the inductive device according to any one of claims 1-9.

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