Switchable power supply module load capacity testing device

Abstract

The utility model discloses a switchable power supply module load capacity testing device which comprises an acrylic base, two acrylic supports are symmetrically installed on the top surface of the acrylic base, and a resistance wire is installed between the two acrylic supports. The device comprises an acrylic base and further comprises a rectangular base, a direct-current voltmeter, a direct-current ammeter, a wiring alligator clip and a ship-shaped switch, the rectangular base is fixed to the surface of the top of the acrylic base, a positive terminal and a negative terminal are installed on the top of the rectangular base, and the direct-current voltmeter, the direct-current ammeter and the ship-shaped switch are placed on the top of the acrylic base; the device is reliable in performance, safe and stable, the device does not contain an electrolytic capacitor, an electronic power switch tube, a cooling fan and other vulnerable devices with limited service life, the resistance wire is made of an anti-oxidation nickel alloy and is long in service life, the resistance wire is installed on the acrylic base in an overhead mode, the mica sleeve is used for heat insulation, a framework cannot be ignited, the resistance wire adopts a fan-free passive cooling mode, and work is stable; wiring is simple and adjustment is convenient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to power load capacity test technical field, concretely relates to a kind of switchable power module load capacity testing device. BACKGROUND

[0002] Power module needs to carry out the load test of output performance when factory, the instrument of prior art to power module performance test, there is the shortcoming such as big size, complex operation, use needs professional knowledge, instrument needs external power supply, expensive, and ordinary method of power performance test is using high-power resistance test, but because resistance resistance is fixed value, leading to the shortcoming that load current is not adjustable or current cannot be linearly regulated, for this utility model provides a kind of switchable power module load capacity testing device. UTILITY MODEL CONTENTS

[0003] The utility model is to provide a kind of switchable power module load capacity testing device to solve the problem raised in the above background.

[0004] To achieve the above object, the utility model provides the following technical scheme: a kind of switchable power module load capacity testing device, including acrylic base, the top surface of acrylic base is symmetrically equipped with two acrylic supports, and resistance wire is installed between the two acrylic supports;

[0005] It further includes rectangular seat, DC voltmeter, DC ammeter, wiring crocodile clamp and boat switch, the rectangular seat is fixed on the top surface of acrylic base, and the top of rectangular seat is provided with positive terminal post and negative terminal post, the DC voltmeter, DC ammeter and boat switch are placed on the top of acrylic base, the left end of resistance wire is connected with positive terminal post by connecting line, the boat switch is connected with positive terminal post by connecting line, and the boat switch is also connected with the right end of resistance wire by connecting line, the positive terminal of DC voltmeter is connected with positive terminal post by connecting line, the negative terminal of DC voltmeter is connected with negative terminal post by connecting line, the positive terminal of DC ammeter is connected with wiring crocodile clamp by connecting line, and wiring crocodile clamp is clamped on resistance wire, the negative terminal of DC ammeter is connected with negative terminal post by connecting line.

[0006] Preferably, the top surface of acrylic support is provided with fixing screw, and resistance wire is fixed with acrylic support by fixing screw.

[0007] Preferably, the top surface of acrylic base is provided with two installation seats corresponding to acrylic support, and the top of installation seat is provided with an integral column block, the bottom surface of acrylic support is provided with column groove corresponding to column block, and column block is inserted into column groove.

[0008] Preferably, the column block is provided with a through hole corresponding to the plug, both sides of the acrylic support are provided with a plug hole corresponding to the plug, the plug is inserted into the plug hole, the plug penetrates through the through hole, rubber inner seats are embedded on both sides of the through hole, the rubber inner seats are provided with positioning protrusions, the plug is provided with two positioning clamping grooves corresponding to the positioning protrusions, and the end of the positioning protrusion is extruded into the positioning clamping groove.

[0009] Preferably, the rubber inner seat and the positioning protrusion are integrated.

[0010] Preferably, the rubber inner seat is provided with a rectangular cavity.

[0011] Compared with the prior art, the utility model has the advantages that:

[0012] 1. reliable performance, safe and stable

[0013] The device does not contain limited life electrolytic capacitor, electronic power switch tube, heat dissipation fan and other vulnerable components, the resistance wire is nickel alloy resistant to oxidation, the service life is long, the resistance wire is installed on the acrylic base in a suspended manner, the mica sleeve is heat insulated, the resistance wire will not ignite the structural material, the resistance wire adopts a passive heat dissipation mode without a fan, and work is stable.

[0014] 2. simple wiring and convenient adjustment

[0015] There are only two wiring posts, the use is intuitive, the wiring is simple, and the alligator clip can be connected to different positions of the resistance wire to adjust the size of the load resistance value.

[0016] 3. display is intuitive, and cost is low

[0017] The pointer type voltage and current meter is used, the service life is long, reading is intuitive and simple, and the total cost of components is low. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a top view of the utility model;

[0019] Figure 2 It is a sectional view of the connection between the acrylic support and the mounting seat of the utility model;

[0020] Figure 3 It is a sectional view of the connection between the acrylic support and the mounting seat of the utility model; Figure 2 It is a local enlarged view of the A area of the utility model;

[0021] In the figure: 1, acrylic base; 11, mounting seat; 12, column block; 13, perforation; 14, rubber inner seat; 15, positioning protrusion; 16, rectangular cavity; 2, acrylic support; 21, fixed screw; 22, column groove; 23, jack; 24, plug; 25, positioning clamping groove; 3, resistance wire; 4, rectangular seat; 5, positive terminal post; 6, negative terminal post; 7, DC voltmeter; 8, DC ammeter; 9, alligator clip; 10, boat switch. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0023] Embodiment 1

[0024] Please refer to Figure 1 , the first embodiment of the utility model, the embodiment provides a kind of technical scheme: a kind of switchable power module load capacity test device, including acrylic base 1, the top surface of acrylic base 1 is symmetrically equipped with two acrylic supports 2, and resistance wire 3 is installed between the two acrylic supports 2, and the spring-shaped nickel-chromium resistance wire with rated voltage 220V and power 1500W is used as discharge load, and is suspended and erected between the two acrylic supports 2 by stretching to about 20cm, can guarantee heat dissipation during work, while ensuring safety;

[0025] It further includes rectangular seat 4, DC voltmeter 7, DC ammeter 8, alligator clip 9 and boat switch 10, rectangular seat 4 is fixed on the top surface of acrylic base 1, and the top of rectangular seat 4 is provided with positive terminal post 5 and negative terminal post 6, DC 30V voltmeter 7, DC 5A ammeter 8 and boat switch 10 are placed on the top of acrylic base 1, the left end of resistance wire 3 is connected with positive terminal post 5 through connecting wire, boat switch 10 is connected with positive terminal post 5 through connecting wire, and boat switch 10 is also connected with the right end of resistance wire 3 through connecting wire, the positive terminal port of DC voltmeter 7 is connected with positive terminal post 5 through connecting wire, the negative terminal port of DC voltmeter 7 is connected with negative terminal post 6 through connecting wire, the positive terminal port of DC ammeter 8 is connected with alligator clip 9 through connecting wire, and alligator clip 9 is clamped on resistance wire 3, and alligator clip 9 can be clamped on different positions of acrylic support 2 in later period, so that the size of load resistance value can be adjusted, and the negative terminal port of DC ammeter 8 is connected with negative terminal post 6 through connecting wire.

[0026] The top surface of the acrylic support 2 is provided with a fixing screw 21, and the resistance wire 3 is fixed with the acrylic support 2 through the fixing screw 21, and the fixed part of the resistance wire 3 is isolated from the fixing screw 21 by using a mica sleeve, so as to play a temperature insulation and insulation role.

[0027] In summary, when in use, the positive and negative electrodes of the power module to be tested are connected with the positive and negative electrode connecting posts 5 and 6 firmly, the connecting crocodile clip 9 is kept in a suspended state, the power supply of the power module is turned on, if the power module starts normally under no load, the no-load output voltage of the power module will be indicated on the direct current voltmeter 7 of the testing device;

[0028] After the voltage is normally indicated, the connecting crocodile clip 9 can be contacted on different positions of the resistance wire 3, and the values of the direct current voltmeter 7 and the direct current ammeter 8 are observed, compared with the rated parameters of the power module, the position is adjusted, the required current size is obtained, the connecting crocodile clip 9 is clamped, and the power module is kept running continuously, so that the stability of the power module can be tested; after the rated working condition position of the power module is obtained, the connecting crocodile clip 9 can also be used to test the overload protection and short circuit protection functions of the power module by being contacted with the area closer to the positive electrode than the rated working condition position, and in the process, the boat-shaped switch 10 can be closed to switch to a high-power working mode, because the resistance wire 3 is in a head-to-tail parallel state after the boat-shaped switch 10 is closed, the resistance is reduced, the current is increased, and the load capacity is increased, which is suitable for testing the power module with low voltage and large current output, and is more suitable for testing the high-power power module.

[0029] Embodiment 2

[0030] Please refer to Figures 1 to 3 For the second embodiment of the utility model, the embodiment is based on the previous embodiment, and the difference is that the acrylic support 2 can be conveniently disassembled through the structures of the mounting seat 11, the column block 12 and the plug block 24.

[0031] Specifically, the top surface of the acrylic base 1 is provided with two mounting seats 11 corresponding to the acrylic support 2, and the top of the mounting seat 11 is provided with an integrated column block 12; the bottom surface of the acrylic support 2 is provided with a column groove 22 corresponding to the column block 12; the column block 12 is inserted into the column groove 22; the surface of the column block 12 is provided with a through hole 13 corresponding to a plug block 24; the two side surfaces of the acrylic support 2 are provided with plug holes 23 corresponding to the plug block 24; the plug block 24 is inserted into the plug hole 23; and the plug block 24 penetrates through the through hole 13, so that the column block 12 and the acrylic support 2 can be inserted together.

[0032] The two inner walls of the through hole 13 are embedded with rubber inner seats 14, the surface of the rubber inner seat 14 is provided with a positioning protrusion 15, the surface of the plug 24 is symmetrically provided with two positioning clamping grooves 25 corresponding to the positioning protrusion 15, the end of the positioning protrusion 15 is extruded into the positioning clamping groove 25, the plug 24 can be limited, the stability of the connection between the column block 12 and the acrylic support 2 is ensured, when the acrylic support 2 is installed, the bottom end of the acrylic support 2 is inserted on the column block 12, the column block 12 enters the column groove 22, then the plug 24 is transversely inserted into the insertion hole 23, the plug 24 can pass through the column block 12 through the through hole 13, the end of the positioning protrusion 15 is extruded into the positioning clamping groove 25, the plug 24 is limited, and the connection between the acrylic support 2 and the column block 12 is quickly realized.

[0033] The rubber inner seat 14 and the positioning protrusion 15 are integrated structures, both are made of rubber material, and can be elastically deformed when extruded, and the rubber inner seat 14 is provided with a rectangular cavity 16, so that the positioning protrusion 15 has enough deformation space when extruded.

[0034] Although the embodiments of the utility model have been shown and described (see the above detailed description), it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A switchable power module load capability test device comprising an acrylic base (1) characterised in that: The top surface of the acrylic base (1) is symmetrically provided with two acrylic supports (2), and a resistance wire (3) is arranged between the two acrylic supports (2). The rectangular seat (4) is fixed on the top surface of the acrylic base (1), and the top of the rectangular seat (4) is provided with a positive terminal post (5) and a negative terminal post (6). The DC voltage meter (7), the DC current meter (8) and the boat-shaped switch (10) are placed on the top of the acrylic base (1). The left end of the resistance wire (3) is connected to the positive terminal post (5) through a connecting wire. The boat-shaped switch (10) is connected to the positive terminal post (5) through a connecting wire, and is also connected to the right end of the resistance wire (3) through a connecting wire. The positive terminal of the DC voltage meter (7) is connected to the positive terminal post (5) through a connecting wire. The negative terminal of the DC voltage meter (7) is connected to the negative terminal post (6) through a connecting wire. The positive terminal of the DC current meter (8) is connected to the connecting wire crocodile clip (9) through a connecting wire, and the connecting wire crocodile clip (9) is clamped on the resistance wire (3). The negative terminal of the DC current meter (8) is connected to the negative terminal post (6) through a connecting wire.

2. A switchable power module load capability test device according to claim 1, characterized in that: The top surface of the acrylic support (2) is provided with a fixing screw (21), and the resistance wire (3) is fixed to the acrylic support (2) through the fixing screw (21).

3. A switchable power module load capability test device according to claim 1, wherein: The top surface of the acrylic base (1) is provided with two mounting seats (11) corresponding to the acrylic supports (2), and the top of the mounting seat (11) is provided with an integral column block (12). The bottom surface of the acrylic support (2) is provided with a column groove (22) corresponding to the column block (12), and the column block (12) is inserted into the column groove (22).

4. A switchable power module load capability test device according to claim 3, wherein: The surface of the column block (12) is provided with a through hole (13) corresponding to the plug block (24). The two side surfaces of the acrylic support (2) are provided with plug holes (23) corresponding to the plug block (24). The plug block (24) is inserted into the plug hole (23), and the plug block (24) penetrates the through hole (13).

5. A switchable power module load capability test device according to claim 4, wherein: The two side inner walls of the through hole (13) are embedded with rubber inner seats (14). The surface of the rubber inner seat (14) is provided with a positioning protrusion (15). The surface of the plug block (24) is symmetrically provided with two positioning clamping grooves (25) corresponding to the positioning protrusion (15). The end of the positioning protrusion (15) is extruded into the positioning clamping groove (25).

6. A switchable power module load capability test device according to claim 5, wherein: The rubber inner seat (14) and the positioning protrusion (15) are of an integral structure.

7. A switchable power module load capability test device according to claim 5, wherein: The rubber inner seat (14) is provided with a rectangular cavity (16).

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