CN115047304A - Intelligent testing device and method for IGBT module - Google Patents

Abstract

The invention provides an intelligent testing device for an IGBT module, which comprises a controller, a probe module, a clamping module, a limiting module, a conveyor belt and a rotating shaft, wherein two ends of the conveyor belt are movably connected with the rotating shaft, the conveyor belt moves in a ring shape through the rotating shaft, the rotating shaft is movably connected with a support through a bearing, the clamping module, the probe module and the limiting module are sequentially arranged along the moving direction of the conveyor belt, the clamping module is fixedly connected with the support, the probe module is fixedly connected with the support, the limiting module is fixedly connected with the support, and the controller is fixedly connected with any position of the support. Controller electric connection probe module, centre gripping module and spacing module, spacing module fixes a position the IGBT module, and the centre gripping module is fixed the IGBT module, and the probe module tests, and simple structure can improve efficiency of software testing, directly takes off when avoiding artifical test that the IGBT module is easily wounded simultaneously. The invention also provides an intelligent testing method of the IGBT module, which is suitable for the intelligent testing device of the IGBT module.

Description

Intelligent testing device and method for IGBT module

Technical Field

The invention relates to the technical field of IGBT chip test platforms, in particular to an IGBT module intelligent test device and method.

Background

The IGBT combines the advantages of both the high input impedance of the MOSFET and the low turn-on voltage drop of the GTR. The method is very suitable for being applied to the fields of current transformation systems with direct-current voltage of 600V or more, such as alternating-current motors, frequency converters, switching power supplies, lighting circuits, traction transmission and the like.

In the IGBT module process flow, the IGBT module that is packaged needs to be tested in order to evaluate the electrical parameter characteristics of the module. Generally, the IGBT module internal interconnect circuitry is brought out through busbar terminals to provide ports for testing and connection to external circuitry. In daily production process, usually accomplish with the mode that artifical detected, detection efficiency is low, and the IGBT module of artifical direct taking is easy to be damaged during big voltage detection.

Disclosure of Invention

The invention provides an intelligent testing device and method for an IGBT module, aiming at overcoming the technical problem that the IGBT module is damaged by impact in the process of manual detection and large voltage detection at present.

The invention provides an intelligent testing device for an IGBT module, which comprises a controller, 2 probe modules, a clamping module, a limiting module, a conveyor belt and a rotating shaft, wherein 2 rotating shafts are arranged, 2 conveyor belts are arranged, two ends of the conveyor belts are movably connected with the rotating shaft, the conveyor belts move in a circular manner through the rotating shaft, the rotating shaft is movably connected with a bracket through a bearing, the clamping module, the probe modules and the limiting module are sequentially arranged along the moving direction of the conveyor belts, the clamping module is fixedly connected with the bracket, the clamping module is arranged on the outer side of the conveyor belts, the probe modules are fixedly connected with the bracket, the probe modules are arranged on the inner side of the conveyor belts and are lower than the horizontal plane of the conveyor belts, the limiting module is fixedly connected with the bracket, the IGBT module is placed on the conveyor belts, the controller with support optional position fixed connection, probe module, spacing module with the centre gripping module is electric connection respectively the controller, during the test, IGBT module with the conveyer belt synchronous motion, IGBT module with spacing module contact, centre gripping module centre gripping IGBT module, probe module and IGBT electric connection accomplish the test.

Preferably, spacing module sets up support one end is close to the rotation axis position, the probe module is close to spacing module sets up, the centre gripping module is equipped with 2, including first centre gripping group and second centre gripping group, first centre gripping group with the probe module corresponds the setting, second centre gripping group with first centre gripping group interval size is greater than the IGBT module size.

Preferably, the centre gripping module includes clamp splice, pressure sensor and second motor, the clamp splice is equipped with 2, the clamp splice corresponds the setting, the clamp splice passes through lead screw swing joint, arbitrary the clamp splice outside fixed connection the second motor, the second motor with lead screw fixed connection, the second motor with controller electric connection, arbitrary the inboard fixed connection pressure sensor of clamp splice, the second centre gripping module the clamp splice inboard is equipped with position sensor, pressure sensor with position sensor electric connection respectively.

Preferably, the probe module includes casing, first motor, test needle and push pedal, the casing is equipped with the cavity, the push pedal is arranged in the cavity, the push pedal shape with the cavity corresponds, cavity bottom fixed connection first motor, first motor with the push pedal passes through lead screw swing joint, the push pedal is kept away from first motor one side with test needle one end fixed connection, the casing top is equipped with the trompil, trompil quantity with the test needle one-to-one, the test needle other end passes the trompil, test needle quantity and position respectively with the test point one-to-one of the IGBT module that awaits measuring, first motor with controller electric connection.

Preferably, the limit module comprises a stop block, a pressure sensor and a third motor, one side of the stop block is movably connected with the support through a screw rod, the top of the stop block is fixedly connected with the third motor, a rotor of the third motor is movably connected with the screw rod in a meshing mode, the other side of the stop block is fixedly connected with the pressure sensor, and the pressure sensor and the third motor are electrically connected with the controller.

Preferably, a fourth motor is arranged on one side of any one of the rotating shafts, the fourth motor is meshed with the rotating shaft and movably connected with the rotating shaft, the fourth motor is fixedly connected with the support, and the fourth motor is electrically connected with the controller.

The invention also provides an intelligent testing method of the IGBT module, which is suitable for the intelligent testing device of the IGBT module and comprises the following steps:

s1: the controller sets working parameters and places the IGBT modules to be tested on the conveyor belt in order;

s2: the fourth motor works, the rotating shaft and the fourth motor work synchronously, and the rotating shaft drives the conveyor belt and the IGBT module to move;

s3: the second clamping group clamps the IGBT module through a signal fed back by the position sensor, and the second clamping module opens according to preset parameters of the controller to enable the IGBT to move towards the limiting module;

s4: the IGBT module is in contact with the pressure sensor fixedly connected with the limiting module, the IGBT module and the limiting module are kept relatively static, and the pressure sensor transmits a pressure signal to the controller;

s5: the first clamping group clamps the IGBT module, and the pressure sensor fixedly connected with the first clamping group sends the pressure extruded by the IGBT module to the control module;

s6: the control module controls the first motor to work, the first motor jacks up the push plate, and the test needle is in contact with the IGBT module test point to perform testing;

s7: after the IGBT module is tested, the first motor works to withdraw the push plate, the third motor works to lift the stop dog, and the 2 clamping modules are opened, so that the tested IGBT module flows into the next procedure;

s8: the first motor controls the limiting module to descend to a preset position according to preset parameters of the controller, and the test process is completed.

Compared with the prior art, the intelligent testing device for the IGBT module provided by the invention has the following advantages:

1. the utility model provides a IGBT module intelligent test device, through controller electric connection probe module, centre gripping module and spacing module, the IGBT module is fixed a position to spacing module, and the IGBT module is fixed to the centre gripping module, and the probe module is tested, and simple structure can improve efficiency of software testing, directly takes IGBT module when avoiding artifical test simultaneously and is easily wounded.

2. An IGBT module intelligent test method is characterized in that detection is carried out through a pressure sensor and a position sensor, intelligent test is achieved by a controller according to preset parameters and signals sent by the pressure sensor and the position sensor, and test efficiency is improved.

Drawings

Fig. 1 is a schematic diagram of an overall structure of an intelligent testing device for an IGBT module provided by the present invention;

fig. 2 is a schematic cross-sectional structure diagram of an intelligent testing device for an IGBT module provided by the present invention.

Description of reference numerals: 1. an IGBT module intelligent test device; 2. a clamping module; 21. a second clamping group; 22. a first clamping group; 23. a second motor; 24. a clamping block; 3. a probe module; 31. a first motor; 32. pushing the plate; 33. a test pin; 4. a limiting module; 41. a pressure sensor; 42. a stopper; 43. a third motor; 5. a rotating shaft; 51. a fourth motor; 6. a conveyor belt; 7. a controller; 8. an IGBT module; 9. and (4) a bracket.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Referring to fig. 1 to 2, the invention provides an intelligent testing device 1 for an IGBT module, which comprises a controller 7, a probe module 3, a clamping module 2, a limiting module 4, a conveyor belt 6 and a rotating shaft 5, wherein 2 rotating shafts 5 are provided, 2 conveyor belts 6 are provided, two ends of the conveyor belt 6 are movably connected with the rotating shaft 5, the conveyor belt 6 moves circularly through the rotating shaft 5, the rotating shaft 5 is movably connected with a bracket 9 through a bearing, the clamping module 2, the probe module 3 and the limiting module 4 are sequentially arranged along the moving direction of the conveyor belt 6, the clamping module 2 is fixedly connected with the bracket 9, the clamping module 2 is arranged at the outer side of the conveyor belt 6, the probe module 3 is fixedly connected with the bracket 9, the probe module 3 is arranged at the inner side of the conveyor belt 6 and lower than the horizontal plane of the conveyor belt 6, the limiting module 4 is fixedly connected with the bracket 9, the IGBT module 8 is arranged on the conveyor belt 6, the controller 7 is fixedly connected with any position of the bracket 9, the probe module 3, the limit module 4 and the clamping module 2 are respectively electrically connected with the controller 7.

It can be understood that, during the test, rotation axis 5 drives conveyer belt 6 and is the annular motion, and IGBT module 8 is placed on conveyer belt 6 to with 6 synchronous movement of conveyer belt, when IGBT module 8 removed to the spacing module 4 of contact, 2 centre gripping IGBT modules 8 of centre gripping module, probe module 3 tests with 8 electric connection of IGBT module.

It can be understood that spacing module 4 is used for carrying out the positioning action to IGBT module 8, ensures that IGBT module 8 position corresponds with probe module 3 position, through 2 centre gripping IGBT modules 8 of centre gripping module, increases the electric connection stability of the test of IGBT module 8.

Specifically, spacing module 4 sets up and is close to rotation axis 5 position in support 9 one end, and probe module 3 is close to spacing module 4 and sets up, and centre gripping module 2 is equipped with 2, including first centre gripping group 22 and second centre gripping group 21, and first centre gripping group 22 corresponds the setting with probe module 3, and second centre gripping group 21 and first centre gripping group 22 interval size are greater than the IGBT module size.

It can be understood that probe module 3 is close to spacing module 4 and sets up, and first centre gripping group 22 corresponds the setting with probe module 3, makes IGBT module 8 remove to the spacing module 4 of contact time, and centre gripping module 2 accomplishes centre gripping IGBT module 8 smoothly to make probe module 3 test smoothly. The second clamping group 21 and the first clamping group 22 are larger than the IGBT module size, the second clamping group 21 and the first clamping group 22 are prevented from clamping the same IGBT module 8, and therefore testing fluency is affected.

Specifically, the clamping module 2 includes clamp blocks 24, pressure sensors 41 and a second motor 23, the clamp blocks 24 are provided with 2, the clamp blocks 24 are correspondingly arranged, the clamp blocks 24 are movably connected through a screw rod, the second motor 23 is fixedly connected to the outer side of any clamp block 24, the second motor 23 is fixedly connected to the screw rod, the second motor 23 is electrically connected to the controller 7, the pressure sensors 41 are fixedly connected to the inner side of any clamp block 24, position sensors are provided on the inner side of the clamp block 24 of the second clamping group 21, and the pressure sensors 41 and the position sensors are respectively electrically connected to the controller 7.

It can be understood that the second motor 23 controls 2 clamping blocks 24 to clamp the IGBT module 8 through the lead screw, the pressure sensor 41 is disposed on the corresponding inner side of each of the 2 clamping blocks 24, and the controller 7 controls the force of the clamping blocks 24 to clamp the IGBT module 8 through the signal fed back by the pressure sensor 41. The controller 7 controls the second clamping group 21 to clamp the IGBT module 8 by using a position sensor provided inside the clamping block 24 of the second clamping group 21. The position sensor is used for detecting the position information of the IGBT module 8, so that the controller 7 controls the second clamping group 21 to smoothly clamp the IGBT module 8, and the position sensor may be disposed at the second clamping group 21 or at the front end of the second clamping group 21.

Specifically, probe module 3 includes the casing, first motor 31, test needle 33 and push pedal 32, the casing is equipped with the cavity, the cavity is arranged in to push pedal 32, push pedal 32 shape corresponds with the cavity, the first motor 31 of cavity bottom fixed connection, first motor 31 passes through lead screw swing joint with push pedal 32, first motor 31 one side and test needle 33 one end fixed connection are kept away from to push pedal 32, the casing top is equipped with the trompil, trompil quantity and test needle 33 one-to-one, the trompil is passed to the test needle 33 other end, test needle 33 quantity and position respectively with the test point one-to-one of the IGBT module 8 that awaits measuring, first motor 31 and 7 electric connection of controller.

It can be understood that controller 7 passes through first motor 31 control push pedal 32 and is ejecting with test needle 33, and test needle 33 passes trompil and IGBT module 8 electric connection test, and when avoiding long-term the use, test needle 33 receives mutual extruded power to warp in the contact test with IGBT module 8, causes test needle 33 and IGBT module 8 electric connection unstable.

Specifically, the limiting module 4 comprises a stopper 42, a pressure sensor 41 and a third motor 43, one side of the stopper 42 is movably connected with the bracket 9 through a screw rod, the top of the stopper 42 is fixedly connected with the third motor 43, a rotor of the third motor 43 is movably connected with a screw rod in a meshing manner, the other side of the stopper 42 is fixedly connected with the pressure sensor 41, and the pressure sensor 41 and the third motor 43 are electrically connected with the controller 7.

It can be understood that the third motor 43 controls the stopper 42 to complete the lifting movement through the lead screw, the stopper 42 stops the IGBT module 8 from moving continuously after being lowered, the IGBT module 8 is positioned after the position of the IGBT module 8 is completed, and the IGBT module 8 can flow into the next process through the bottom of the limit module 4 after the test is completed and the stopper 42 is raised. Pressure sensor 41 is used for detecting IGBT module 8 and conveyer belt 6 synchronous movement speed, avoids IGBT module 8 high-speed removal striking spacing module 4, causes spacing module 4 and IGBT module 8 damage. The pressure sensor 41 sends the detection information to the controller 7, and the controller 7 controls the moving speed of the conveyor belt 6 to realize the automatic speed adjustment of the conveyor belt 6.

Specifically, one side of any rotating shaft 5 is provided with a fourth motor 51, the fourth motor 51 is engaged and movably connected with the rotating shaft 5, the fourth motor 51 is fixedly connected with the bracket 9, and the fourth motor 51 is electrically connected with the controller 7.

It is understood that the controller 7 controls the rotation shaft 5 to operate through the fourth motor 51, the conveyor belt 6 is movably connected with the rotation shaft 5, and the conveyor belt 6 moves synchronously with the rotation shaft 5 when the rotation shaft 5 rotates.

Referring to fig. 1 to fig. 2, the present invention further provides an intelligent testing method for an IGBT module, which is suitable for the intelligent testing apparatus 1 for an IGBT module, and includes the following steps:

s1: the controller 7 sets working parameters and places the IGBT modules 8 to be tested on the conveyor belt 6 in order;

s2: the fourth motor 51 works, the rotating shaft 5 and the fourth motor 51 work synchronously, and the rotating shaft 5 drives the conveyor belt 6 and the IGBT module 8 to move;

s3: the second clamping group 21 clamps the IGBT module 8 through a signal fed back by the position sensor, and the second clamping module opens according to preset parameters of the controller 7 to enable the IGBT to move towards the limiting module 4;

s4: the IGBT module 8 is in contact with a pressure sensor 41 fixedly connected with the limit module 4, the IGBT module 8 and the limit module 4 are kept relatively static, and the pressure sensor 41 transmits a pressure signal to the controller 7;

s5: the first clamping group 22 clamps the IGBT module, and the pressure sensor 41 fixedly connected with the first clamping group 22 sends the pressure extruded by the IGBT module to the control module;

s6: the control module controls the first motor 31 to work, the first motor 31 jacks up the push plate 32, and the test needle 33 is in contact with the IGBT module 8 test point for testing;

s7: after the IGBT module 8 is tested, the first motor 31 works to withdraw the push plate 32, the third motor 43 works to lift the stop block 42, and the 2 clamping modules 2 are opened, so that the tested IGBT module 8 flows into the next procedure;

s8: the first motor 31 controls the limit module 4 to descend to a preset position according to preset parameters of the controller 7, and the test process is completed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit of the present invention are intended to be included within the scope of the present invention.

Claims (7)

1. The utility model provides an IGBT module intelligent test device which characterized in that: comprises a controller, a probe module, a clamping module, a limiting module, a conveyor belt and a rotating shaft, wherein 2 rotating shafts are arranged, 2 conveyor belts are arranged, two ends of the conveyor belt are movably connected with the rotating shaft, the conveyor belt moves through the rotating shaft in a circular manner, the rotating shaft is movably connected with a support through a bearing, the clamping module, the probe module and the limiting module are sequentially arranged along the moving direction of the conveyor belt, the clamping module is fixedly connected with the support, the clamping module is arranged on the outer side of the conveyor belt, the probe module is fixedly connected with the support, the probe module is arranged on the inner side of the conveyor belt and is lower than the horizontal plane of the conveyor belt, the limiting module is fixedly connected with the support, the conveyor belt is used for placing an IGBT module, and the controller is fixedly connected with any position of the support, the probe module, the limiting module and the clamping module are respectively and electrically connected with the controller, during testing, the IGBT module and the conveyor belt synchronously move, the IGBT module is in contact with the limiting module, the clamping module clamps the IGBT module, and the probe module is electrically connected with the IGBT module to complete testing.

2. The intelligent testing device for the IGBT module as claimed in claim 1, wherein: the limiting module is arranged at one end of the support and close to the position of the rotating shaft, the probe module is close to the limiting module, the number of the clamping modules is 2, the clamping modules comprise a first clamping group and a second clamping group, the first clamping group corresponds to the probe module, and the second clamping group is larger than the IGBT module in the interval size of the first clamping group.

3. The intelligent testing device for the IGBT module as claimed in claim 2, wherein: the centre gripping module includes clamp splice, pressure sensor and second motor, the clamp splice is equipped with 2, the clamp splice corresponds the setting, the clamp splice passes through lead screw swing joint, arbitrary the clamp splice outside fixed connection the second motor, the second motor with lead screw fixed connection, the second motor with controller electric connection, arbitrary the inboard fixed connection pressure sensor of clamp splice, the second centre gripping module the clamp splice inboard is equipped with position sensor, pressure sensor with position sensor difference electric connection the controller.

4. The intelligent testing device for the IGBT module as claimed in claim 1, wherein: the probe module comprises a shell, a first motor, a testing needle and a push plate, wherein the shell is provided with a cavity, the push plate is arranged in the cavity, the shape of the push plate corresponds to that of the cavity, the bottom of the cavity is fixedly connected with the first motor, the first motor is movably connected with the push plate through a lead screw, the push plate is far away from one side of the first motor and one end of the testing needle are fixedly connected, the top of the shell is provided with an opening, the number of the openings corresponds to that of the testing needle in a one-to-one mode, the other end of the testing needle penetrates through the opening, the number and the position of the testing needle correspond to testing points of an IGBT module to be tested in a one-to-one mode respectively, and the first motor is electrically connected with the controller.

5. The intelligent testing device for the IGBT module as claimed in claim 1, wherein: the limiting module comprises a stop block, a pressure sensor and a third motor, one side of the stop block is movably connected with the support through a screw rod, the top of the stop block is fixedly connected with the third motor, a rotor of the third motor is movably connected with the screw rod in a meshing mode, the other side of the stop block is fixedly connected with the pressure sensor, and the pressure sensor and the third motor are electrically connected with the controller.

6. The intelligent testing device for the IGBT module as claimed in claim 1, wherein: and a fourth motor is arranged on one side of any rotating shaft, the fourth motor is meshed with the rotating shaft and movably connected with the rotating shaft, the fourth motor is fixedly connected with the support, and the fourth motor is electrically connected with the controller.

7. An intelligent testing method for an IGBT module, which is suitable for the intelligent testing device for the IGBT module as claimed in any one of the above claims 1-6, and comprises the following steps:

s1: the controller sets working parameters and places the IGBT modules to be tested on the conveyor belt in order;

s2: the fourth motor works, the rotating shaft and the fourth motor work synchronously, and the rotating shaft drives the conveyor belt and the IGBT module to move;

s3: the second clamping group clamps the IGBT module through a signal fed back by the position sensor, and the second clamping module opens according to preset parameters of the controller to enable the IGBT to move towards the limiting module;

s4: the IGBT module is in contact with the pressure sensor fixedly connected with the limiting module, the IGBT module and the limiting module are kept relatively static, and the pressure sensor transmits a pressure signal to the controller;

s5: the first clamping group clamps the IGBT module, and the pressure sensor fixedly connected with the first clamping group sends the pressure extruded by the IGBT module to the control module;

s6: the control module controls the first motor to work, and the first motor jacks up the push plate to enable the test needle to be in contact with the IGBT module test point for testing;

s7: after the IGBT module is tested, the first motor works to withdraw the push plate, the third motor works to lift the stop dog, and the 2 clamping modules are opened, so that the tested IGBT module flows into the next procedure;

s8: the first motor controls the limiting module to descend to a preset position according to preset parameters of the controller, and the test process is completed.

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