Power Device Testing Equipment and System

Abstract

This utility model discloses a power device detection apparatus and system. The apparatus includes: a control module, an input detection module, an output detection module, a current detection module, and a drive module. The first end of the input detection module is connected to the input terminal of the power device, and the second end is connected to the control module. The first end of the output detection module is connected to the output terminal of the power device, and the second end is connected to the control module. The current detection module is connected in series between the output terminal of the power device and the load, and is also connected to the control module. The first end of the drive module is connected to the control terminal of the power device, and the second end is connected to the control module. The drive module drives the power device to turn on or off according to the control signal from the control module. The control module determines the state of the power device based on the input detection module, the output detection module, and the current detection module. The technical solution provided by this utility model can detect the internal resistance of a power device, thereby determining the performance and lifespan of the power device.

Description

Technical Field

[0001] This utility model relates to the field of electrical component testing technology, and in particular to a power device testing device and system. Background Technology

[0002] With the rapid advancement of technology, various industries are placing increasingly stringent demands on equipment performance and safety, leading to a gradual increase in energy conversion efficiency. The use of power devices is particularly prominent in this regard, resulting in a corresponding increase in their failure rate. To ensure the proper functioning of energy conversion systems, such as DC-DC, AC-DC, and motor drives, it is typically necessary to test the performance of these power devices. Without assessing their performance, it is impossible to provide early warnings or take appropriate action when system anomalies or damage occur, leading to reduced production efficiency and economic losses. Utility Model Content

[0003] This invention provides a power device detection apparatus and system that determines the performance and lifespan of a power device by detecting its internal resistance, thereby enabling the system's protection function and improving its safety performance.

[0004] According to one aspect of the present invention, a power device detection device is provided, comprising: a control module, an input detection module, an output detection module, a current detection module, and a drive module;

[0005] The input terminal of the power device is connected to the power supply, and the output terminal of the power device is connected to the load;

[0006] The first end of the input detection module is connected to the input end of the power device, and the second end of the input detection module is connected to the control module; the first end of the output detection module is connected to the output end of the power device, and the second end of the output detection module is connected to the control module; the current detection module is connected in series between the output end of the power device and the load, and is also connected to the control module.

[0007] The first end of the drive module is connected to the control end of the power device, and the second end of the drive module is connected to the control module; the drive module is used to drive the power device to turn on or off according to the control signal of the control module.

[0008] The control module is used to determine the state of the power device based on the input detection module, the output detection module, and the current detection module.

[0009] Optionally, the power device testing device further includes: a communication module;

[0010] One end of the communication module is connected to the control module, and the other end of the communication module receives a start signal. The control module controls the power device detection device to start detection according to the start signal.

[0011] Optionally, the input detection module and the output detection module include voltage sensors, and the current detection module includes a current sensor;

[0012] The input detection module is used to detect the input voltage of the power device, the output detection module is used to detect the output voltage of the power device, and the current detection module is used to detect the current flowing through the power device; the control module determines the detection internal resistance value of the power device based on the input voltage, the output voltage, and the current.

[0013] Optionally, the control module stores the calibrated internal resistance value of the power device, and the control module determines the state of the power device based on the difference between the detected internal resistance value and the calibrated internal resistance value.

[0014] Optionally, the power device detection device further includes: a first connection terminal and a second connection terminal;

[0015] The first connection terminal is connected in series between the power supply and the input terminal of the power device, and the second connection terminal is connected in series between the current detection module and the load.

[0016] Optionally, the power device detection device further includes: a protection module; one end of the protection module is connected to the control module, and the other end of the protection module is connected to the drive module.

[0017] According to another aspect of the present invention, a power device testing system is provided, comprising a power device testing apparatus as described in any of the first aspects and a host computer; the host computer is connected to the power device testing apparatus, and the host computer is used to control the power device testing apparatus to start testing.

[0018] Optionally, the host computer includes a display module for displaying the input voltage, the output voltage, the current, and the detected internal resistance value.

[0019] Optionally, the power device detection system further includes a third connection terminal, through which the host computer is connected to the power device detection device.

[0020] This utility model embodiment uses a control module to control a drive module to turn on the power device under test. Then, based on the information detected by the input detection module, output detection module, and current detection module, the status of the power device is detected, thereby determining the service life of the power device under test, improving the reliability, durability, and safety of the power device, and enhancing the protection capability and safety performance of the system using the power device.

[0021] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of this utility model, nor is it intended to limit the scope of this utility model. Other features of this utility model will become readily apparent from the following description. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of the structure of a power device detection device provided in an embodiment of this utility model;

[0024] Figure 2 A schematic diagram of the structure of another power device detection device provided in this embodiment of the utility model;

[0025] Figure 3 A schematic diagram of the structure of another power device detection device provided in this embodiment of the utility model;

[0026] Figure 4 A schematic diagram of a power device detection system provided in an embodiment of this utility model;

[0027] Figure 5 A schematic diagram of another power device detection system provided in this embodiment of the present invention;

[0028] Figure 6 The present invention provides a flowchart of a power device testing system. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] Figure 1 This is a schematic diagram of a power device detection device provided in an embodiment of the present invention. See also... Figure 1 The power device testing device includes: a control module 100, an input detection module 200, an output detection module 300, a current detection module 400, and a drive module 500; the input terminal of the power device 10 under test is connected to the power supply 20, and the output terminal of the power device 10 is connected to the load 30; the first terminal of the input detection module 200 is connected to the input terminal of the power device 10, and the second terminal of the input detection module 200 is connected to the control module 100; the first terminal of the output detection module 300 is connected to the output terminal of the power device 10, and the second terminal of the output detection module 300 is connected to the control module 100. The power device 10 is connected to the control module 100; the current detection module 400 is connected in series between the output terminal of the power device 10 and the load 30, and is also connected to the control module 100; the first terminal of the drive module 500 is connected to the control terminal of the power device 10, and the second terminal of the drive module 500 is connected to the control module 100; the drive module 500 is used to drive the power device 10 to turn on or off according to the control signal of the control module 100; the control module 100 is used to determine the state of the power device according to the input detection module 200, the output detection module 300 and the current detection module 400.

[0032] Specifically, the power device 10 under test can be a transistor, MOSFET, or other type of switching transistor, or other types of power devices in an energy conversion system. The energy conversion system can be a DC-DC, AC-DC, motor drive, or other similar system. During testing, the power device 10 can be connected to a power device testing device, and the control module 100 can perform status detection on the power device to determine whether it is damaged. The first terminal of the input detection module 200 is connected to the input terminal of the power device 10, and the second terminal is connected to the control module 100. The power supply 20 is connected to the input terminal of the power device 10 to supply power to the power device 10. The power supply 20 can be a battery-type DC power supply or a grid-type AC power supply. The input detection module 200 transmits the detected electrical signal input to the power device 10 to the control module 100. One end of the output detection module 300 is connected to the output terminal of the power device 10, and the other end is connected to the control module 100, thereby transmitting the detected electrical signal from the output terminal of the power device 10 to the control module 100. One end of the current detection module 400 is connected to the output terminal of the power device 10, and the other end is connected to the load 30. This allows it to detect the current signal in the circuit containing the power supply 20, power device 10, and load 30, and transmit the current signal to the control module 100 for judgment. The load 30 can be a solenoid valve or controller in the energy conversion system. The control module 100 can be a microprocessor. One end of the drive module 500 is connected to the control module 100, and the other end is connected to the control terminal of the power device 10. The control module 100 sends a control signal to the drive module 500, which in turn provides a drive signal to the power device 10, causing it to conduct for detection. The control signal can be a PWM control signal. When the power device 10 is on, the control module 100 can determine the state of the power device based on the information obtained from the input detection module 200, output detection module 300, and current detection module 400, and thus determine the lifespan of the power device under test.

[0033] This utility model embodiment uses a control module to control a drive module to turn on the power device under test. Then, based on the information detected by the input detection module, output detection module, and current detection module, the status of the power device is detected, thereby determining the service life of the power device under test, improving the reliability, durability, and safety of the power device, and enhancing the protection capability and safety performance of the system using the power device.

[0034] Optionally, Figure 2 This is a schematic diagram of another power device detection device provided as an embodiment of the present utility model. Based on the above embodiments, see... Figure 2The power device testing device also includes: a communication module 600; one end of the communication module 600 is connected to the control module, and the other end of the communication module 600 receives a start signal. The control module 100 controls the power device testing device to start testing according to the start signal.

[0035] Specifically, the power device testing device can also be connected to external devices via a communication module 600. During connection, one end of the communication module 600 is connected to the control module 100, and the other end is connected to the external device. The communication module 600 acts as a bridge between the control module 100 and the external device, responsible for receiving externally input start signals and transmitting them to the control module 100. Upon receiving a valid start signal, the communication module 600 converts the external command into an electrical signal recognizable by the control module 100 through logic conversion, thereby controlling the start of the entire testing process. The communication module 600 can also support data output functionality. It can transmit the testing information and results from the control module 100 to external devices for further analysis or recording.

[0036] Optionally, based on the above embodiments, see below. Figure 2 The input detection module 200 and the output detection module 300 include voltage sensors, and the current detection module includes a current sensor. The input detection module 200 is used to detect the input voltage of the power device 10, the output detection module 300 is used to detect the output voltage of the power device 10, and the current detection module 400 is used to detect the current flowing through the power device 10. The control module 100 determines the detection internal resistance value of the power device 10 based on the input voltage, output voltage, and current.

[0037] Specifically, the voltage sensor in the input detection module 200 can monitor the voltage level provided by the power supply 20 connected to the input terminal of the power device 10 in real time and determine whether the input voltage is within the normal operating range; the voltage sensor in the output detection module 300 can monitor the voltage provided by the output terminal of the power device 10 to the load 30 in real time and determine whether the output voltage is within the normal operating range. The current sensor in the current detection module 400 is connected in series between the output terminal of the power device 10 and the load 30 to ensure accurate capture of the current magnitude passing through the power device 10 under actual operating conditions. The control module 100 can use Ohm's law to calculate the internal resistance of the power device 10 based on the voltage and current data obtained from the input detection module 200, the output detection module 300, and the current detection module 400, and determine the resistance characteristics of the power device 10 based on the internal resistance.

[0038] Optionally, based on the above embodiments, see below. Figure 2 The control module 100 stores the calibrated internal resistance value of the power device 10, and the control module 100 determines the state of the power device 10 based on the difference between the detected internal resistance value and the calibrated internal resistance value.

[0039] Specifically, the power device testing device also includes a debugging interface 700. The debugging interface 700 is connected to the control module 100. The control module 100 can be programmed and debugged through the debugging interface 700, and the calibrated internal resistance value of the power device 10 under test can be input. The control module 100 can compare the detected internal resistance value with the calibrated internal resistance value on the datasheet. If the difference between the detected internal resistance value and the calibrated internal resistance value is within a preset range, the power device under test is determined to be good; if the difference exceeds the preset range, it is determined that the power device under test has increased internal losses and requires further inspection or replacement. It should be noted that the preset range can be the same or different for different types of power devices. The control module 100 can calculate the internal resistance value of the power device under test using the following formula:

[0040]

[0041] Wherein, U is the input voltage detected by the input detection module 200, U1 is the output voltage detected by the output detection module 300, I1 is the current detected by the current detection module 400, and R is the internal resistance of the power device under test.

[0042] Optionally, Figure 3 This is a schematic diagram of another power device detection device provided as an embodiment of the present utility model. Based on the above embodiments, see... Figure 3 The power device detection device further includes: a first connection terminal 40 and a second connection terminal 50; the first connection terminal 40 is connected in series between the power supply 20 and the input terminal of the power device 10, and the second connection terminal 50 is connected in series between the current detection module 400 and the load 30.

[0043] Specifically, the first connection terminal 40 and the second connection terminal 50 are physical interfaces provided on the power device testing device. Both the first connection terminal 40 and the second connection terminal 50 have relatively long connecting wires. The power supply 20 and the load 30 may be far from the power device 10 under test and the testing device. Therefore, during testing, the first connection terminal 40 can have two connecting wires led out: one connected to the power supply 20 and the other to the input terminal of the power device 10 under test; the second connection terminal 50 can have two connecting wires led out, one connected to the current detection module 400 and the other to the load 30; this facilitates the connection of the power device testing device to the power device 10 under test, as well as the power supply 20 and the load 30, improving wiring efficiency during testing.

[0044] Optionally, based on the above embodiments, see below. Figure 3The power device testing device also includes a protection module 800; one end of the protection module 800 is connected to the control module 100, and the other end of the protection module 800 is connected to the drive module 500.

[0045] Specifically, when the difference between the input voltage and the output voltage calculated by the control module 100 exceeds the safety threshold, the control module 100 can record and store the data, and the protection module 800 controls the drive module 500 to stop the drive of the power device under test 10, so as to prevent the power device under test 10 from being damaged by excessive voltage, and to protect the circuit of the power device detection device from damage.

[0046] This utility model embodiment also provides a power device testing system, including the power device testing device and host computer 60 provided in any embodiment of this utility model. Figure 4 This is a schematic diagram of a power device detection system provided in an embodiment of the present invention. Figure 4 As shown, the host computer 60 is connected to the power device detection device, and the host computer 60 is used to control the power device detection device to start detection.

[0047] Specifically, the host computer 60 can be an industrial control computer, a programmable logic controller (PLC), or other control system. The control module 100 in the power device testing device can use a CYT2B75 chip. The host computer 60 is connected to the CYT2B75 chip via a communication module 600. The testing personnel send a start signal through the host computer 60, and the communication module 600 receives the start signal input from the host computer 60 and converts the external command into an electrical signal recognizable by the control module 100 through logic conversion to control the start of the entire testing process.

[0048] Optionally, Figure 5 This is a schematic diagram of another power device detection system provided as an embodiment of the present invention. Figure 5 As shown, the host computer 60 includes a display module 61, which is used to display the input voltage, output voltage, current and detected internal resistance value.

[0049] Specifically, the display module 61 can be an LCD screen. The communication module 600 can support data transmission. The communication module 600 can transmit the detection information and results of the control module 100 to the host computer 60 for further analysis and recording. The display module 61 can intuitively display the input voltage, output voltage, current, and calculated internal resistance value of the power device 10 under test during the test on the display screen.

[0050] Optionally, based on the above embodiments, see below. Figure 5 The power device testing system includes a third connection terminal 62, through which the host computer 62 is connected to the power device testing device.

[0051] Specifically, the third connection terminal 62 can support multiple communication interfaces and communication protocols, thereby facilitating the connection of different types of host computers 60 with the communication module 600 of the power device detection device through the third connection terminal 62, thus expanding the application scope and application scenarios of the power device detection device.

[0052] Figure 6 This is a flowchart illustrating the detection process of a power device detection system provided in an embodiment of the present invention. Figure 6 As shown, during detection, the host computer 60 sends a start signal, at which point the system powers on and begins initialization detection of the control module 100. If the initialization time of the control module 100 is greater than the preset time T1, a fault is determined in the detection system, the host computer 60 records the fault information, and shuts down the detection system. If the initialization time of the control module 100 is less than or equal to the preset time T1, the system checks whether the power device detection device circuit and voltage are normal. If there is an abnormality in the power device detection device circuit and voltage, the system uploads and displays the status information of the power device detection device and shuts down the detection system. If the power device detection device circuit and voltage are normal, the system checks whether the drive module sends a drive signal to drive the power device. If the drive module does not send a drive signal to drive the power device, a fault is determined in the detection system, the host computer 60 records the fault information, and shuts down the detection system. If the drive module sends a drive signal to drive the power device, the system monitors the voltage and current data of the power device in real time and checks whether the voltage and current data exceed the normal range. If the voltage and current data exceed the normal range, a fault is determined in the detection system, the host computer 60 records the fault information, and shuts down the detection system. If the voltage and current data are within the normal range, the internal resistance value calculated by the control module 100 is compared with the calibrated internal resistance value in the datasheet to determine whether the power device is damaged or intact, and the voltage, current, internal resistance information and status of the power device are displayed on the host computer 60.

[0053] It should be understood that the various forms of the process shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this utility model can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this utility model can be achieved, and this is not limited herein.

[0054] The specific embodiments described above do not constitute a limitation on the scope of protection of this utility model. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A power device detecting apparatus characterized by comprising: include: Control module, input detection module, output detection module, current detection module, and drive module; The input terminal of the power device is connected to the power supply, and the output terminal of the power device is connected to the load; The first end of the input detection module is connected to the input end of the power device, and the second end of the input detection module is connected to the control module; the first end of the output detection module is connected to the output end of the power device, and the second end of the output detection module is connected to the control module; the current detection module is connected in series between the output end of the power device and the load, and is also connected to the control module. The first end of the drive module is connected to the control end of the power device, and the second end of the drive module is connected to the control module; the drive module is used to drive the power device to turn on or off according to the control signal of the control module. The control module is used to determine the state of the power device based on the input detection module, the output detection module, and the current detection module.

2. The power device testing device according to claim 1, characterized in that, Also includes: Communication module; One end of the communication module is connected to the control module, and the other end of the communication module receives a start signal. The control module controls the power device detection device to start detection according to the start signal.

3. The power device testing device according to claim 2, characterized in that, The input detection module and the output detection module include voltage sensors, and the current detection module includes a current sensor; The input detection module is used to detect the input voltage of the power device, the output detection module is used to detect the output voltage of the power device, and the current detection module is used to detect the current flowing through the power device. The control module determines the detection internal resistance value of the power device based on the input voltage, the output voltage, and the current.

4. The power device testing device according to claim 3, characterized in that, The control module stores the calibrated internal resistance value of the power device, and the control module determines the state of the power device based on the difference between the detected internal resistance value and the calibrated internal resistance value.

5. The power device testing device according to claim 1, characterized in that, Also includes: First connecting terminal and second connecting terminal; The first connection terminal is connected in series between the power supply and the input terminal of the power device, and the second connection terminal is connected in series between the current detection module and the load.

6. The power device testing device according to claim 1, characterized in that, Also includes: A protection module; one end of the protection module is connected to the control module, and the other end of the protection module is connected to the drive module.

7. A power device testing system, characterized in that, The device includes the power device detection apparatus and host computer as described in any one of claims 1-6; the host computer is connected to the power device detection apparatus and is used to control the power device detection apparatus to start detection.

8. The power device testing system according to claim 7, characterized in that, The host computer includes a display module for displaying the input voltage, the output voltage, the current, and the detected internal resistance value.

9. The power device testing system according to claim 7, characterized in that, It also includes a third connection terminal, through which the host computer is connected to the power device detection device.

Images