Device heating and fixing device suitable for dynamic testing equipment

Abstract

This utility model discloses a device heating and fixing device suitable for dynamic testing equipment, comprising a surrounding frame, a frame body, a heating element, a clamping assembly, and a pressing module. The surrounding frame is a frame structure surrounding a power board. The frame body is mounted on the surrounding frame. The heating element is mounted on the frame body via the clamping assembly. The pressing module is mounted on the frame body and is used to press the device located on the test stand against the heating element. This device heating and fixing device for dynamic testing equipment can fix the device under test (DUT) on the test stand onto the heating module, thereby achieving heating of the DUT.

Description

Technical Field

[0001] This utility model relates to the field of semiconductor dynamic electrical testing, and in particular to a device heating and fixing device suitable for dynamic testing equipment. Background Technology

[0002] In extreme temperature environments, the dynamic electrical parameters of power semiconductor devices (such as switching losses and reverse recovery time) will deviate significantly from their nominal values, directly affecting the stability and energy efficiency of power electronic systems.

[0003] Dynamic electrical parameter testing of power devices under high-temperature conditions can accurately reflect the performance of the devices under extreme operating conditions, and is particularly crucial for exploring the high-temperature operating potential of SiC devices and ensuring safety and reliability.

[0004] However, at present, it is not possible to effectively test the dynamic electrical parameters of discrete semiconductor devices under high-temperature conditions.

[0005] To reduce the lead length between devices and testing equipment, existing semiconductor dynamic electrical parameter testing equipment has a compact layout of test power boards. Dual-pulse testing requires two devices to be inserted into adjacent test sockets at the same time, which results in insufficient space to install heating devices on the device surface.

[0006] As a result, dynamic testing under high-temperature conditions has been difficult to carry out.

[0007] To solve the above problems, it is necessary to provide a device heating and fixing device suitable for dynamic testing equipment. Utility Model Content

[0008] The purpose of this invention is to provide a device heating and fixing device suitable for dynamic testing equipment that can fix the device under test (DUT) on the test stand onto the heating module, thereby achieving heating of the DUT.

[0009] To achieve the above objectives, the present invention provides a device heating and fixing device suitable for dynamic testing equipment, comprising an enclosing frame, a frame body, a heating element, a clamping assembly, and a pressing module. The enclosing frame is a frame structure surrounding the power board. The frame body is installed on the enclosing frame. The heating element is installed on the frame body via the clamping assembly. The pressing module is installed on the frame body and is used to press the device located on the test stand toward the heating element.

[0010] Preferably, a guide assembly is provided between the frame and the enclosing frame. The guide assembly includes a guide rail and a slider. The guide rail is disposed on the enclosing frame, and the slider is disposed on the frame. The frame is movably disposed on the enclosing frame by means of the slider sliding on the guide rail.

[0011] Specifically, the guide components are provided in two sets, and the two guide components are symmetrically arranged on both sides of the enclosing frame.

[0012] Preferably, the frame includes vertical plates and horizontal plates, with each side of the horizontal plate connected to the enclosing frame via a vertical plate, and the heating element connected to the horizontal plate via the clamp assembly.

[0013] Specifically, the horizontal plate includes a first horizontal plate and a second horizontal plate, which are symmetrically connected between the two vertical plates. The clamping assembly includes a clamping base plate, a first locking nut, a second locking nut, and a support screw. One side of the clamping base plate extends toward the support screw to form a connecting lug. The connecting lug has a locking hole corresponding to the support screw. The first horizontal plate has a left mounting hole corresponding to the support screw, and the second horizontal plate has a right mounting hole corresponding to the support screw. One end of the support screw is connected to the first locking nut, and the other end of the support screw passes through the right mounting hole, the locking hole, and the left mounting hole in sequence and is finally connected to the second locking nut to fix the clamping base plate between the first horizontal plate and the second horizontal plate. The other side of the clamping base plate extends outward to form a clamping lug for clamping the heating element.

[0014] Specifically, one end of the support screw is detachably connected to the first locking nut, and the other end of the support screw is detachably connected to the second locking nut.

[0015] Specifically, both the left mounting hole and the right mounting hole are elongated holes. The support screw is adjustablely positioned in the left mounting hole along the length direction of the left mounting hole, and the support screw is adjustablely positioned in the right mounting hole along the length direction of the right mounting hole, so as to adjust the position of the support screw.

[0016] Specifically, the clamping base plate has heat dissipation holes for heat dissipation.

[0017] Preferably, the clamping module includes a fixing block and a pressure rod. The fixing block is fixed to the frame, and the pressure rod has a threaded structure with the fixing block. The position of the pressure rod relative to the fixing block is adjusted by rotating the pressure rod, so that the pressure rod presses against the device.

[0018] Specifically, the frame body has a clearance hole corresponding to the pressure rod for the pressure rod to pass through.

[0019] Compared with the prior art, the device heating and fixing device of this utility model suitable for dynamic testing equipment combines a surrounding frame, a frame body, a heating element, a clamping assembly, and a pressing module. The surrounding frame is a frame structure that surrounds the power board, thereby achieving the purpose of enclosing the power board. The frame body is installed on the surrounding frame, and the heating element is installed on the frame body through the clamping assembly. It can be understood that the test seat is on the power board, and the device to be tested is installed on the test seat during testing. Then, the heating element is installed on the frame body through the clamping assembly, so that the heating element can be pressed against the device through the frame structure, thereby achieving the purpose of heating the device. The bottom surrounding frame can provide support for the frame body. The pressing module is installed on the frame body. The pressing module is used to press the device located on the test seat against the heating element. The pressing module not only achieves the purpose of further fixing the device, but also makes the device fit better against the device. The frame can form an extended frame structure for the heating element, allowing the heating element to be suspended close to the device without occupying too much lower space. This solves the problem of insufficient space in the test system preventing the addition of a heating module to the device, thus hindering high-temperature dynamic testing. This utility model's device heating and fixing device for dynamic testing equipment can fix the device under test (DUT) on the test stand to the heating block, thereby achieving heating of the DUT. Attached Figure Description

[0020] Figure 1 This is a three-dimensional structural diagram of the device heating and fixing device applicable to dynamic testing equipment according to this utility model.

[0021] Figure 2 This is a three-dimensional structural diagram of the device heating and fixing device applicable to dynamic testing equipment according to this utility model.

[0022] Figure 3 This is a top view of the device heating and fixing device applicable to dynamic testing equipment according to this utility model.

[0023] Figure 4 This is a schematic diagram of the internal structure of the device heating and fixing device applicable to dynamic testing equipment according to this utility model.

[0024] Figure 5 This is another internal structural diagram of the device heating and fixing device applicable to dynamic testing equipment according to this utility model.

[0025] Figure 6 yes Figure 5 A magnified view of a portion of point A in the middle. Detailed Implementation

[0026] To explain in detail the technical content, structural features, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0027] Please see Figures 1 to 6 The device heating and fixing device 100 applicable to dynamic testing equipment of this utility model includes a surrounding frame 1, a frame body 2, a heating body 3, a clamping assembly 4, and a pressing module 5. The surrounding frame 1 is a frame structure that surrounds the power plate 30, thereby achieving the purpose of wrapping the power plate 30. The size of the surrounding frame 1 is equivalent to that of the dynamic testing power plate 30, and it is fixed around the power plate 30. The surrounding frame 1 can wrap the power plate 30. The frame 2 is mounted on the enclosing frame 1, and the heating element 3 is mounted on the frame 2 via the clamping assembly 4. It can be understood that the test base 20 is on the power board 30, and the device 10 to be tested is mounted on the test base 20. Then, the heating element 3 is mounted on the frame 2 via the clamping assembly 4, allowing the heating element 3 to adhere tightly to the device 10 through the frame 2 structure, thereby achieving the purpose of heating the device 10. The enclosing frame 1 at the bottom provides support for the frame 2. The clamping module 5 is mounted on the frame 2 and is used to press the device 10 located on the test base 20 towards the heating element 3. The clamping module 5 not only further fixes the device 10 but also allows the device 10 to adhere better to the frame 2. The frame 2 forms an extended frame structure for the heating element 3, allowing the heating element 3 to be suspended close to the device 10 without occupying too much lower space. This solves the problem that the limited space in the testing system prevents the addition of a heating element 3 to the device 10, thus hindering high-temperature dynamic testing. The device heating and fixing device 100 of this utility model, suitable for dynamic testing equipment, can fix the device under test 10 on the test seat 20 onto the heating block, thereby realizing the heating of the device under test 10. More specifically, as follows:

[0028] Please see Figure 1 A guide assembly 6 is provided between the frame 2 and the enclosing frame 1. The guide assembly 6 includes a guide rail 61 and a slider 62. The guide rail 61 is located on the enclosing frame 1 and is arranged along the length of the enclosing frame 1. The slider 62 is located on the frame 2. By sliding the slider 62 on the guide rail 61, the frame 2 can be movably positioned on the enclosing frame 1, thereby adjusting the relative position between the frame 2 and the enclosing frame 1. This allows the position of the heating element 3 to be arbitrarily adjusted in the horizontal direction, which can accommodate different dynamic test power boards 30. Preferably, there are two sets of guide assemblies 6, which are symmetrically arranged on both sides of the enclosing frame 1. The symmetrical guidance on both sides makes the adjustment of the frame 2 more stable. In this embodiment, the frame 2 is a gantry structure, and the guide assemblies 6 on both sides can better adapt to the overall structure of the gantry.

[0029] Please see Figures 1 to 4The frame 2 includes vertical plates 21 and horizontal plates 22. The two ends of the horizontal plates 22 are nested in the upper half of the vertical plates 21 and further fixed by fasteners. There are two vertical plates 21. Each side of the horizontal plate 22 is connected to the enclosing frame 1 through a vertical plate 21. The heating element 3 is connected to the horizontal plate 22 through a clamp assembly 4. Specifically, the horizontal plate 22 includes a first horizontal plate 221 and a second horizontal plate 222, with a test space between them. The first horizontal plate 221 and the second horizontal plate 222 are symmetrically connected between the two vertical plates 21. The clamping assembly 4 includes a clamping base plate 41, a first locking nut 42, a second locking nut 43, and a support screw 44. One side of the clamping base plate 41 extends toward the support screw 44 to form a connecting ear 413. The connecting ear 413 has a locking hole 4131 corresponding to the support screw 44. In this embodiment, there are four connecting ears 413, each with a locking hole 4131. There are two support screws 44, with two connecting ears 413 corresponding to one support screw. The rods 44 and the support screws 44 are spaced apart along the height direction of the frame 2. The first horizontal plate 221 has a left mounting hole 2211 corresponding to the support screws 44, and the second horizontal plate 222 has a right mounting hole 2221 corresponding to the support screws 44. One end of the support screws 44 is connected to the first locking nut 42, and the other end of the support screws 44 passes through the right mounting hole 2221, the locking hole 4131, the left mounting hole 2211 in sequence, and finally connects to the second locking nut 43 to fix the clamping base plate 41 between the first horizontal plate 221 and the second horizontal plate 222. The other side of the clamping base plate 41 extends outward to form a clamping ear 411 for clamping the heating element 3. The clamping ear 411 can be an elastic clamping ear 411. The clamping base plate 41 can be a deformable clamp. When the first locking nuts 42 and the second locking nuts 43 on both sides are tightened, they contact the horizontal plate 22, pressing the horizontal plate 22 to produce a slight deformation, which in turn squeezes the clamping ears 411 of the clamping base plate 41 inward, thereby clamping the heating element 3 and fixing the heating element 3 on the supporting horizontal plate 22, thus fixing the position of the heating module. The heating element 3 uses a PTC heater. PTC heating is a heating technology based on positive temperature coefficient materials. Its core characteristic is that the resistance of the material increases significantly with increasing temperature. This characteristic allows the PTC heater to achieve self-regulation of temperature without the need for a complex temperature control system. The signal cable and power cable of the heating element 3 are led out from its tail and connected to an external temperature control system, which adjusts the heating temperature of the heating element 3.

[0030] Please see Figure 1 and Figure 6One end of the support screw 44 is detachably connected to the first locking nut 42, and the other end is detachably connected to the second locking nut 43, thereby facilitating the removal of the clamping base plate 41. Specifically, both the left mounting hole 2211 and the right mounting hole 2221 are elongated holes. The support screw 44 is adjustablely positioned in the left mounting hole 2211 along its length, and the support screw 44 is also adjustablely positioned in the right mounting hole 2221 along its length, so as to adjust the position of the support screw 44, thereby adjusting the position of the heating element 3, so that the heating element 3 is closer to the device 10. Preferably, there are two left mounting holes 2211 and two right mounting holes 2221, and the left mounting holes 2211 and the right mounting holes 2221 are spaced apart along the height direction of the frame 2.

[0031] Please see Figure 6 The clamping base plate 41 has heat dissipation holes 414 for heat dissipation. Multiple heat dissipation holes 414 are provided and are arranged at equal intervals, which helps the heating element 3 to cool down after it stops working.

[0032] Please see Figures 4 to 5 The clamping module 5 includes a fixing block 51 and a pressure rod 52. The fixing block 51 is fixed to the frame 2. The pressure rod 52 has a threaded structure with the fixing block 51. By rotating the pressure rod 52, the position of the pressure rod 52 relative to the fixing block 51 is adjusted, so that the pressure rod 52 presses against the device 10. Specifically, the frame 2 has a clearance hole 223 for the pressure rod 52 to pass through. The head of the pressure rod 52 is equipped with a cylindrical head made of high-temperature resistant material. The center of the heating element 3 is directly in front of the pressure rod 52. During operation, the tail of the pressure rod 52 is rotated using a tool. With the cooperation of the fixing block 51, the pressure rod 52 rotates forward. The cylindrical head contacts the center point of the device 10 under test, and continuous pressure is applied to press the device 10 under test onto the heating element 3, thereby achieving a tight fit between the device 10 and the heating element 3.

[0033] Please refer to the following: Figures 1 to 6 The working process of the device heating and fixing device 100 of this utility model, which is suitable for dynamic testing equipment, is as follows:

[0034] Installation: Place the enclosure frame 1 vertically onto the power plate 30 of the dynamic testing equipment, and install the guide assembly 6 and the vertical plate 21. First, install a horizontal plate 22 on the vertical plate 21, then fix the clamping module 5 on the first horizontal plate 22, and install another horizontal plate 22 on the vertical plate 21. One end of the support screw 44 is connected to the first locking nut 42, and the other end of the support screw 44 passes through the right mounting hole 2221, the locking hole 4131, the left mounting hole 2211 in sequence, and finally connects to the second locking nut 43, thereby fixing the heating element 3. Finally, use fasteners to completely fix the clamping module 5.

[0035] Adjustment: First, move the guide assembly 6 to move the heating element 3 on the horizontal plate 22 so that its position is aligned with the test base 20. It is understood that the power board 30 has two parallel test bases 20, both of which can hold the device 10. Lock the guide assembly 6 to prevent the frame 2 from moving. Then, move the heating element 3 back and forth so that it is positioned between the two test bases 20. Insert the device under test 10 and the auxiliary device 10 into test bases 1 and 2 from top to bottom. Finally, adjust the position of the heating element 3 so that it contacts the back substrate of the device under test 10. Tighten the second locking nut 43 to completely fix the heating element 3.

[0036] Pressing: Use a tool to rotate the tail of the pressure rod 52, so that the pressure rod 52 rotates forward and moves to contact the device under test 10. Continue to rotate the pressure rod 52 to press the device under test 10 into close contact with the heating element 3.

[0037] Start-up: Connect the power signal cable of the heating module to the power supply and temperature control system, set the temperature, turn on the system, the heating element heats up and transfers heat to the device under test 10, so that the junction temperature of device 10 reaches the specified temperature.

[0038] By combining the enclosing frame 1, the frame body 2, the heating element 3, the clamping assembly 4, and the pressing module 5, the enclosing frame 1 is a frame structure that surrounds the power board 30, thereby achieving the purpose of enclosing the power board 30. The frame body 2 is installed on the enclosing frame 1, and the heating element 3 is installed on the frame body 2 through the clamping assembly 4. It can be understood that the test seat 20 is on the power board 30, and the device 10 to be tested is installed on the test seat 20 during testing. Then, the heating element 3 is installed on the frame body 2 through the clamping assembly 4, so that the heating element 3 can be pressed against the device 10 through the frame body 2 structure, thereby achieving the purpose of heating the device 10. The bottom enclosing frame 1 can provide support for the frame body 2. The pressing module 5 is installed on the frame 2. The pressing module 5 is used to press the device 10 located on the test seat 20 against the heating element 3. The pressing of the pressing module 5 not only achieves the purpose of further fixing the device 10, but also allows the device 10 to be better pressed against the device 10. The frame 2 can form an extended frame structure for the heating element 3, allowing the heating element 3 to be suspended close to the device 10 without occupying too much lower space. This solves the problem that the limited space in the test system prevents the addition of a heating module to the device 10, thus hindering high-temperature dynamic testing. The device heating and fixing device 100 of this invention, suitable for dynamic testing equipment, can fix the device 10 under test (DUT) on the test base 20 onto the heating block, thereby achieving heating of the DUT 10.

[0039] The above-disclosed examples are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent changes made in accordance with the scope of the present utility model application shall still fall within the scope of the present utility model.

Claims

1. A device heating and fixing device suitable for dynamic testing equipment, characterized in that, The device includes an enclosure frame, a frame body, a heating element, a clamping assembly, and a pressing module. The enclosure frame is a frame structure that surrounds the power board. The frame body is mounted on the enclosure frame. The heating element is mounted on the frame body via the clamping assembly. The pressing module is mounted on the frame body and is used to press the device located on the test stand against the heating element.

2. The device heating fixture for use with dynamic test equipment of claim 1, wherein, A guide assembly is provided between the frame and the enclosing frame. The guide assembly includes a guide rail and a slider. The guide rail is located on the enclosing frame, and the slider is located on the frame. The frame is movably located on the enclosing frame by sliding the slider on the guide rail.

3. The device heating fixture for use with dynamic test equipment of claim 2, wherein, The guide components are provided in two sets, and the two guide components are symmetrically arranged on both sides of the enclosing frame.

4. The device heating fixture for use with dynamic test equipment of claim 1 wherein, The frame includes vertical plates and horizontal plates. Each side of the horizontal plate is connected to the enclosing frame via a vertical plate. The heating element is connected to the horizontal plate via the clamp assembly.

5. The device heating fixture for use with dynamic test equipment of claim 4, wherein, The horizontal plate includes a first horizontal plate and a second horizontal plate, which are symmetrically connected between the two vertical plates. The clamping assembly includes a clamping base plate, a first locking nut, a second locking nut, and a support screw. One side of the clamping base plate extends toward the support screw to form a connecting lug. The connecting lug has a locking hole corresponding to the support screw. The first horizontal plate has a left mounting hole corresponding to the support screw, and the second horizontal plate has a right mounting hole corresponding to the support screw. One end of the support screw is connected to the first locking nut, and the other end of the support screw passes through the right mounting hole, the locking hole, and the left mounting hole in sequence and is finally connected to the second locking nut to fix the clamping base plate between the first horizontal plate and the second horizontal plate. The other side of the clamping base plate extends outward to form a clamping lug for clamping the heating element.

6. The device heating fixture for use with dynamic test equipment of claim 5, wherein, One end of the support screw is detachably connected to the first locking nut, and the other end of the support screw is detachably connected to the second locking nut.

7. The device heating fixture for use with dynamic test equipment of claim 5, wherein, Both the left and right mounting holes are elongated holes. The support screw is adjustablely positioned in the left mounting hole along the length of the left mounting hole, and the support screw is adjustablely positioned in the right mounting hole along the length of the right mounting hole, so as to adjust the position of the support screw.

8. The device heating fixture for use with dynamic test equipment of claim 5, wherein, The clamping base plate has heat dissipation holes for heat dissipation.

9. The device heating fixture for use with dynamic test equipment of claim 1 wherein, The clamping module includes a fixing block and a pressure rod. The fixing block is fixed to the frame, and the pressure rod has a threaded structure with the fixing block. The position of the pressure rod relative to the fixing block is adjusted by rotating the pressure rod, so that the pressure rod presses against the device.

10. The device heating and fixing device suitable for dynamic testing equipment as described in claim 9, characterized in that, The frame has clearance holes corresponding to the pressure rod, allowing the pressure rod to pass through.

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