A contactor calibration device

Abstract

The present application provides a verification device for a contactor, the device includes a host computer, a voltage output module and a feedback module, wherein the host computer is respectively connected to the voltage output module and the feedback module, and the feedback module and the voltage output module are also respectively connected to the contactor; first, the host computer controls the voltage output module to transmit the set output voltage to the contactor so that the contactor produces an action, and then the action parameters of the contactor are fed back to the host computer through the feedback module, and finally the action characteristics of the contactor are verified and corrected by the host computer according to the feedback action parameters. In this way, the action characteristics of each contactor in the mass-produced contactor can be corrected within the set range to ensure that the action characteristics of the mass-produced contactors are consistent, thereby improving the verification efficiency of the contactor.

Description

Technical Field

[0001] The present application relates to the technical field of electronic circuits, and in particular to a contactor calibration device. Background Art

[0002] A contactor is an electrical control device used to control the opening and closing of a circuit. The contactor is based on the principle of electromagnetic attraction. When the power is turned on, the coil generates a magnetic field, which causes the action system to move due to attraction, thereby causing the contacts to close or open. In order to ensure the normal operation and safe use of the contactor, the contactor needs to be calibrated.

[0003] The existing electronic control contactor is generally verified by internal detection, such as using a single-chip microcomputer to sample and calculate the input voltage and current of the coil; or by controlling the power tube to perform pulse width modulation (PWM) on the coil current to make the contactor close, hold or release. These two methods are open-loop systems for the contactor system, which can only accurately control PWM to control the coil current size and indirectly activate the action system on the contactor. They are suitable for the verification scenario of contactors with good structural consistency.

[0004] However, when the contactor is mass-produced, factors such as the contactor's reset spring, slight deformation of the mechanism, and deviation of the circuit board components can easily cause deviations in the sampling voltage and current, resulting in deviations in the product's action characteristics such as pull-in, hold, or release. The traditional approach is to increase the pull-in current and hold current to ensure that the contactor's action characteristics meet the inspection requirements, but it cannot guarantee that every contactor works with the optimal action characteristics. Therefore, mass-produced contactors are prone to uneven action characteristics, which affects the contactor's verification efficiency. Summary of the invention

[0005] The purpose of the embodiments of the present application is to provide a contactor calibration device, which is used to solve the problem in the prior art that the calibration efficiency is affected by uneven action characteristics of mass-produced contactors.

[0006] In order to achieve the above-mentioned object, the present application provides a contactor calibration device, including a host computer, a voltage output module and a feedback module, the host computer is connected to the voltage output module and the feedback module respectively, and the voltage output module and the feedback module are connected to the contactor respectively;

[0007] The voltage output module is configured to transmit the output voltage set by the host computer to the contactor so as to cause the contactor to operate;

[0008] A feedback module is configured to feed back the action parameters of the contactor to the host computer;

[0009] The host computer is configured to change the action characteristics of the contactor by controlling the voltage of the voltage output module, and to verify and correct the action characteristics of the contactor according to the action parameters fed back by the feedback module.

[0010] In the embodiment of the present application, the voltage output module includes a programmable power supply and a communication module, the first end of the programmable power supply is connected to the host computer through the communication module; the second end of the programmable power supply is connected to the contactor;

[0011] The host computer sends the set output voltage to the programmable power supply through the communication module, so that the programmable power supply transmits the output voltage to the contactor.

[0012] In an embodiment of the present application, the action parameter includes an operating state parameter, the feedback module includes a DI input module, the DI input module is connected between the host computer and the contactor, and the DI input module is used to feed back the operating state parameter of the contactor to the host computer.

[0013] In the embodiment of the present application, the host computer is also configured as follows:

[0014] Adjust the output voltage of the voltage output module;

[0015] Receive the operating status parameters of the contactor fed back by the DI input module;

[0016] The operating state parameters of the contactor are verified based on the operating state parameters and the set operating state parameters.

[0017] In the embodiment of the present application, the operating state parameters include the pull-in state parameters and the release state parameters, and the host computer is further configured as follows:

[0018] The output voltage of the control voltage output module rises from the starting value to the pull-in threshold value;

[0019] Receive the operating status parameters of the contactor fed back by the DI input module;

[0020] When the operating state parameter is a pull-in state parameter, a pull-in parameter fault prompt message is generated;

[0021] When the operating state parameter is a release state parameter, the output voltage of the control voltage output module rises from the pull-in threshold value to the upper limit value;

[0022] Receive the operating status parameters of the contactor fed back by the DI input module;

[0023] When the operating state parameter is a release state parameter, a pull-in parameter fault prompt message is generated;

[0024] When the operating state parameter is the pull-in state parameter, the output voltage of the control voltage output module drops from the upper limit value to the release threshold value;

[0025] Receive the operating status parameters of the contactor fed back by the DI input module;

[0026] When the operation state parameter is a release state parameter, a release parameter fault prompt message is generated;

[0027] When the operating state parameter is the pull-in state parameter, the output voltage of the control voltage output module drops from the release threshold to the minimum release threshold;

[0028] Receive the operating status parameters of the contactor fed back by the DI input module;

[0029] When the operating state parameter is a pull-in state parameter, a release parameter fault prompt message is generated;

[0030] When the operating state parameter is a release state parameter, the output voltage of the control voltage output module rises from the minimum release threshold to a set multiple of the pull-in threshold;

[0031] Receive the operating status parameters of the contactor fed back by the DI input module;

[0032] When the operating state parameter is a release state parameter, a pull-in parameter fault prompt message is generated;

[0033] When the operating state parameter is the pull-in state parameter, the verification of the operating state parameter of the contactor is completed.

[0034] In an embodiment of the present application, the first end of the voltage output module is connected to the host computer, the second end of the voltage output module is connected to the contactor, the action parameter also includes the coil current value of the contactor, the feedback module also includes a current sensor, the first end of the current sensor is connected to the host computer, and the second end is respectively connected to the second end of the voltage output module and the contactor, and the current sensor is used to feed back the coil current value of the contactor to the host computer.

[0035] In the embodiment of the present application, the host computer is also configured as follows:

[0036] Adjust the output voltage of the voltage output module;

[0037] Obtain the coil current value corresponding to the current output voltage fed back by the current sensor;

[0038] Determine the contactor's operating power and operating speed at the current output voltage based on the coil current value;

[0039] Correct the contactor's operating power and operating speed to the set operating power and set operating speed respectively.

[0040] In the embodiment of the present application, the host computer is also configured as follows:

[0041] The output voltage of the control voltage output module rises from the pull-in threshold value to the upper limit value, and the pull-in threshold value to the upper limit value include multiple voltage values;

[0042] For each voltage value, receive the coil current value fed back by the current sensor, and record the contactor start time fed back by the DI input module and the contactor end time;

[0043] Determine the contactor's pull-in power and pull-in speed based on the coil current value, pull-in start time, and pull-in completion time;

[0044] Correct the contactor's pull-in power and pull-in speed to the set pull-in power and set pull-in speed respectively.

[0045] In the embodiment of the present application, the host computer is also configured as follows:

[0046] Controlling the output voltage of the voltage output module to drop from a release threshold to a minimum release threshold, wherein the voltage values ​​between the release threshold and the minimum release threshold include multiple voltage values;

[0047] For each voltage value, receive the coil current value fed back by the current sensor, and record the release start time of the contactor fed back by the DI input module and the release position time of the contactor;

[0048] Determine the release power and release speed of the contactor according to the coil current value, release start time and release end time;

[0049] Correct the release power and release speed of the contactor to the set release power and set release speed respectively.

[0050] In the embodiment of the present application, the voltage output module includes a programmable power supply and a communication module, the first end of the programmable power supply is connected to the host computer through the communication module; the second end of the programmable power supply is connected to the contactor;

[0051] The host computer sends the set output voltage to the program-controlled power supply through the communication module, so that the program-controlled power supply transmits the output voltage to the contactor;

[0052] The contactor includes a coil, an action system, a contact and a coil control board, wherein the first end of the coil control board is respectively connected to a program-controlled power supply, a current sensor and a communication module, the second end of the coil control board is connected to the coil, and the contact is connected to a DI input module;

[0053] The programmable power supply transmits the output voltage sent by the host computer to the coil control board. The coil control board controls the on and off of the coil according to the output voltage, so that the action system moves and the state of the contact changes between the attracted state and the released state.

[0054] In the embodiment of the present application, the host computer is also configured as follows:

[0055] The set action characteristics of the contactor are sent to the coil control board through the communication module, so that the coil control board burns the set action characteristics;

[0056] When receiving a burning fault feedback from the coil control board, a burning fault prompt message is generated.

[0057] In the embodiment of the present application, the host computer is also configured as follows:

[0058] Controlling the output voltage of the programmable power supply through the communication module, so as to transmit the output voltage to the coil control board through the programmable power supply;

[0059] The receiving coil control board calibrates the voltage based on the output voltage;

[0060] When the output voltage does not match the calibrated voltage, a voltage fault prompt message is generated.

[0061] The verification device of the contactor provided in the present application includes a host computer, a voltage output module and a feedback module, wherein the host computer is respectively connected to the voltage output module and the feedback module, and the voltage output module and the feedback module are also respectively connected to the contactor; first, the host computer controls the voltage output module to transmit the set output voltage to the contactor so that the contactor produces an action, and then the action parameters of the contactor are fed back to the host computer through the feedback module, and finally the action characteristics of the contactor are verified and corrected by the host computer according to the feedback action parameters. In this way, through the verification device of the above-mentioned contactor, the action characteristics of each contactor in the mass-produced contactor can be corrected within the set range respectively to ensure that the action characteristics of the mass-produced contactors are consistent, thereby improving the verification efficiency of the contactor.

[0062] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0064] Figure 1 This is a schematic structural diagram of a contactor calibration device according to an embodiment of the present application;

[0065] Figure 2 This is a structural schematic diagram of a contactor calibration device according to another embodiment of the present application;

[0066] Figure 3This is a schematic structural diagram of a contactor calibration device according to a specific embodiment of the present application;

[0067] Figure 4 This is a flow chart of a method for verifying operating state parameters of a contactor according to a specific embodiment of the present application;

[0068] Figure 5 A schematic flow chart of a method for correcting the pull-in power and pull-in speed of a contactor according to a specific embodiment of the present application;

[0069] Figure 6 The present invention is a flowchart of a method for correcting the release power and release speed of a contactor according to a specific embodiment of the present application.

[0070] Description of Reference Numerals

[0071] 100, host computer; 200, voltage output module; 300, feedback module; 400, contactor; 500, interaction module; 210, programmable power supply; 220, communication module; 310, DI input module; 320, current sensor; 410, coil; 420, action system; 430, contact; 440, coil control board. DETAILED DESCRIPTION

[0072] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.

[0073] In the description of the present application, it should be understood that the terms "first" and "second" are used only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined. In the present application, the word "exemplary" is used to mean "used as an example, illustration or description". Any embodiment described as "exemplary" in the present application is not necessarily interpreted as being more preferred or more advantageous than other embodiments. In order to enable any technician in the field to implement and use the present application, the following description is given. In the following description, details are listed for the purpose of explanation. It should be understood that a person of ordinary skill in the art can recognize that the present application can also be implemented without using these specific details. In other examples, well-known structures and processes will not be elaborated in detail to avoid unnecessary details that make the description of the present application obscure. Therefore, the present application is not intended to be limited to the embodiments shown, but is consistent with the widest range of principles and features disclosed in the present application.

[0074] When the contactor is mass-produced, the sampled voltage and current may be easily deviated due to the slight deformation of the contactor's reset spring and mechanism, the deviation of the circuit board components, etc., which may cause deviations in the action characteristics of the product such as the pull-in, hold or release, thereby affecting the calibration efficiency of the contactor. Therefore, the present application provides a calibration device for the contactor, which automatically adjusts the input voltage of the contactor to correct the deviation of the contactor's action characteristics caused by the deviation of the contactor's components, thereby improving the calibration efficiency of the contactor.

[0075] Figure 1 FIG. 4 is a schematic diagram of a structure of a calibration device for a contactor 400 according to an embodiment of the present application. Figure 1 As shown, in an embodiment of the present application, a calibration device for a contactor 400 is provided, which may include a host computer 100, a voltage output module 200 and a feedback module 300, wherein the host computer 100 is connected to the voltage output module 200 and the feedback module 300, respectively, and the voltage output module 200 and the feedback module 300 are connected to the contactor 400, respectively;

[0076] The voltage output module 200 is configured to transmit the output voltage set by the host computer 100 to the contactor 400 so as to cause the contactor 400 to operate;

[0077] The feedback module 300 is configured to feed back the action parameters of the contactor 400 to the host computer 100;

[0078] The host computer 100 is configured to change the action characteristic of the contactor 400 by controlling the voltage of the voltage output module, and to verify and correct the action characteristic of the contactor 400 according to the action parameter fed back by the feedback module 300 .

[0079] The host computer 100 refers to a computer or device used for communication and data exchange with a lower computer (such as a programmable logic controller (PLC), a single-chip microcomputer, etc.) in an automatic control system. The host computer 100 can not only display the data collected by the host computer in real time, but also set and adjust the working parameters of the lower computer, and realize the control and regulation of the system by sending control commands to the lower computer. At the same time, the host computer 100 can also store and analyze the collected data. When the control system is abnormal, it can issue an alarm in time and provide a fault diagnosis function. The host computer can include but is not limited to personal computers, industrial computers or servers, etc., which are equipped with a high-performance central processing unit (CPU), a large memory, storage space, and a variety of I / O interfaces.

[0080] In the embodiment of the present application, the host computer 100 is connected to the voltage output module 200 and the feedback module 300 respectively, and the voltage output module 200 and the feedback module 300 are also connected to the contactor 400 respectively. In this way, the host computer 100 can control the voltage output module 200 to control the contactor 400 to produce an action; at the same time, the host computer 100 can also receive the action parameters of the contactor 400 fed back by the feedback module 300, so as to verify and correct the action characteristics of the contactor 400.

[0081] Among them, the voltage output module 200 is a module for outputting voltage to the contactor 400 so that the contactor 400 generates a corresponding action according to the voltage. The first end of the voltage output module 200 is connected to the host computer 100, and the second end of the voltage output module 200 is connected to the contactor 400. The host computer 100 can obtain the set output voltage, and the set output voltage can be a set value pre-stored in the host computer 100, or a set value received through the input interface. The host computer 100 first sends the set output voltage to the voltage output module 200, and the voltage output module 200 then transmits the output voltage set by the host computer 100 to the contactor 400. In this way, the host computer 100 can change the input voltage received by the contactor 400 by adjusting the set output voltage.

[0082] The feedback module 300 is a module for feeding back the action parameters of the contactor 400. The action parameters refer to the parameters of the contactor generating action. In one example, the action parameters of the contactor may include operating state parameters, which are used to characterize the operating state of the contactor, such as the pull-in state and the release state. For example, 1 and 0 can be used to represent the parameters corresponding to the pull-in state and the parameters corresponding to the release state, respectively. In another example, the action parameters of the contactor may also include the coil current value of the contactor 400, and the pull-in power of the contactor can be calculated by the coil current value. After the host computer 400 controls the voltage output module 200 to output the set output voltage to the contactor 400, the contactor 400 will generate an action according to the output voltage of the voltage output module 200. At this time, the action parameters of the contactor 400 when generating an action are fed back to the host computer 100 through the feedback module 300, and the host computer 100 then verifies and corrects the action characteristics of the contactor 400 according to the action parameters fed back by the received feedback module 300. The action characteristics of the contactor 400 may include but are not limited to the pull-in action, the release action, the pull-in speed, the pull-in power, etc. In one example, the host computer 400 can pre-store the set action characteristics of the contactor 400. By comparing the action parameters fed back by the feedback module 300 with the set action characteristics, the contactor 400 is verified and corrected. The set action characteristics can be the optimal state of the action characteristics. Correcting each contactor 400 to the set action characteristics can make the action characteristics of each contactor 400 in mass production consistent, thereby improving the verification efficiency of the contactor 400. It should be noted that the set action characteristics can be updated according to the effect of the contactor 400 in actual use, so that the action characteristics of the contactor 400 are better.

[0083] In summary, the contactor verification device provided in the present application first controls the voltage output module 200 through the host computer 100 to transmit the set output voltage to the contactor 400, so that the contactor 100 generates an action, and then the action parameters of the contactor 400 are fed back to the host computer 100 through the feedback module 300, and finally the action characteristics of the contactor 400 are verified and corrected by the host computer 100 according to the feedback action parameters. In this way, through the verification device of the above-mentioned contactor 400, the action characteristics of each contactor 400 in the mass-produced contactor 400 can be corrected within the set range, which can ensure that the action characteristics of the mass-produced contactors 400 are consistent, thereby improving the verification efficiency of the contactor 400.

[0084] Figure 2 FIG. 4 is a schematic diagram of a structure of a calibration device for a contactor 400 according to another embodiment of the present application. Figure 2As shown, in the embodiment of the present application, the verification device of the contactor 400 may further include an interaction module 500 connected to the host computer 100 and configured to receive input interaction information and display fault prompt information sent by the host computer 100.

[0085] In the embodiment of the present application, the interactive module 500 can be used for human-computer interaction, and can receive interactive information input by the user in the interface of the interactive module 500, and can also display fault information sent by the host computer 100. In this way, the user can input interactive information through the interactive module 500, and flexibly set and modify the control parameters of the host computer 100 according to the needs; the verification process can also be monitored in real time through the interactive module 500, and the possible faults of the contactor 400 can be known in time according to the fault prompt information displayed by the interactive module 500, so as to carry out timely processing. In one example, the interactive module 500 can be a display screen set on the surface of the host computer 100, or a human-computer interaction device connected to the host computer 100 through an interface, or a human-computer interaction device communicating with the host computer 100 through a wireless connection. The interactive module 500 can improve the user experience, improve the verification efficiency, reduce errors and misoperations, and support diverse user needs.

[0086] In an embodiment of the present application, the voltage output module 200 can send the output voltage set by the host computer 100 to the contactor 400, so the voltage output module 200 may include an element for transmitting voltage, such as a program-controlled power supply. The feedback module 300 can feed back the action parameters of the contactor 400, such as the operating state parameters and coil current values ​​including the pull-in state parameters and the release state parameters. Therefore, the feedback module 300 may include an element that can feed back the action parameters of the contactor 400. For the operating state parameters, an element that can monitor the action parameters of the contactor 400 can be selected. For the collection of the coil current value of the contactor 400, a current sensor, a current transformer, a Hall sensor, etc. can be selected to collect the current value. Specifically, the element of current collection can be selected according to the application scenario.

[0087] The following description takes the programmable power supply as a component in the voltage output module 200, the DI input module (Digital Input Module) and the current sensor as components in the feedback module 300, and the interactive module 500 as a human-machine interface as an example.

[0088] Figure 3 FIG. 1 is a schematic diagram of a contactor calibration device according to a specific embodiment of the present application. Figure 3As shown, in an embodiment of the present application, the voltage output module 200 may include a programmable power supply 210 and a communication module 220, the first end of the programmable power supply 210 is connected to the host computer 100 through the communication module 220; the second end of the programmable power supply 210 is connected to the contactor 400; the host computer 100 sends the set output voltage to the programmable power supply 210 through the communication module 220, so that the programmable power supply 210 transmits the output voltage to the contactor 400.

[0089] In the embodiment of the present application, the programmable power supply 210 and the host computer 100 can be connected through the communication module 220. The programmable power supply 210 is a power supply with a digital control function, and can achieve precise control of the output power by setting parameters such as voltage, current and time. The programmable power supply 210 has the characteristics of good stability, high control accuracy, wide adjustment range and rich communication interfaces. Therefore, as a transmission element for the output voltage set by the host computer 100, it has a good transmission effect.

[0090] The communication module 220 is used to realize the data transmission and the sending and receiving of the control command between the host computer 100 and the program-controlled power supply 210. In one example, the communication module 210 may include but is not limited to a serial communication module, an Ethernet communication module and a Universal Serial Bus (USB) communication module. The type of the communication module 210 can be selected according to the interface type and the communication protocol between the host computer 100 and the program-controlled power supply 210. For example, if the connection between the host computer 100 and the program-controlled power supply 210 uses a serial port interface, a serial communication module such as RS232 or RS485 communication module can be selected. For another example, if the connection between the host computer 100 and the program-controlled power supply 210 uses an Ethernet interface, an Ethernet communication module can be selected. Similarly, if the connection between the host computer 100 and the program-controlled power supply 210 uses a USB interface, a USB communication module can be selected. The communication module 210 acts as a bridge between the host computer 100 and the programmable power supply 210, realizing data transmission and interaction of control commands, so that the host computer 100 can send the set output voltage to the programmable power supply 210 through the communication module 220, so that the programmable power supply 210 transmits the output voltage to the contactor 400.

[0091] In the embodiment of the present application, the action parameter may include an operation state parameter and a coil current value of the contactor 400 , and the feedback module 300 may include a DI input module 310 and a current sensor 320 .

[0092] The DI input module 310 is connected between the host computer 100 and the contactor 400 , and is used to feed back the operating state parameters of the contactor 400 to the host computer 100 .

[0093] The first end of the current sensor 320 is connected to the host computer 100 , and the second end is respectively connected to the second end of the programmable power supply 210 and the contactor 400 . The current sensor 320 is used to feed back the coil current value of the contactor 400 to the host computer 100 .

[0094] In the present application example, the DI input module 310 is a digital module that inputs digital signals to the host computer 100, and is used to monitor the state of the contactor 400 and convert it into a digital signal that can be processed by the host computer 100. The DI input module has the characteristics of high flexibility, high reliability, real-time, multi-channel input and easy integration. Therefore, the DI input module is selected to monitor the action parameters of the contactor 400. After the contactor 400 is actuated, the action parameters corresponding to the action of the contactor 400 are fed back to the host computer 100, which can make the feedback action parameters obtained by the host computer 100 more timely and accurate, thereby improving the verification efficiency of the verification device.

[0095] The current sensor 320 is a sensor for measuring the coil current value of the contactor 400, and outputs the current by converting the current into an electrical signal corresponding thereto. In the embodiment of the present application, the first end of the current sensor 320 is connected to the host computer 100, and the second end is connected to the contactor 400 and the program-controlled power supply 210. In addition to collecting the coil current value of the contactor 400, the current value between the program-controlled power supply 210 and the contactor 400 can also be collected to monitor the current value corresponding to the output voltage.

[0096] It should be noted that the feedback module 300 of the embodiment of the present application includes but is not limited to the above-mentioned elements, and the elements of the feedback module can be increased or decreased according to actual verification requirements to enable the host computer 100 to collect the action parameters of the contactor 400.

[0097] In an embodiment of the present application, the contactor 400 may include a coil 410, an action system 420, a contact 430 and a coil control board 440, the first end of the coil control board 440 is respectively connected to the programmable power supply 210, the current sensor 320 and the communication module 220, the second end of the coil control board 440 is connected to the coil 410, and the contact 430 is connected to the DI input module 310.

[0098] In the embodiment of the present application, the coil control board 440 is a circuit board for controlling the coil 410 of the contactor 400. The program-controlled power supply 210 transmits the output voltage sent by the host computer 100 to the coil control board 440, and the coil control board 440 receives the output voltage set by the host computer 100. The coil control board 440 then transmits the output voltage to the coil 410 of the contactor, thereby controlling the on and off of the coil 410. In this way, the action system 420 can be moved according to the on and off of the coil 440, so that the state of the contact 430 changes between the attracted state and the released state. The contact 430 includes a moving contact and a fixed contact, the fixed contact is fixed inside the contactor 400, and the moving contact can move with the operation of the coil 410. For example, the coil control board 440 controls the coil 410 to be turned on, and at this time, the coil 410 generates a magnetic field, so that the action system 420 is attracted and moves. The action system 420 brings the moving contact in the attraction contact 430 into contact with the fixed contact, so that the current can pass through the contactor 400 to close the circuit; on the contrary, the coil control board 440 controls the coil 410 to disconnect, the magnetic field disappears, the moving contact loses its attraction, and the action system 420 returns to the initial position, so that the moving contact rebounds to the initial position and separates from the fixed contact, so that the current cannot pass through the contactor 400 to disconnect the circuit. The contactor 400 may also include a reset spring to maintain a good contact state between the moving contact and the fixed contact, and quickly separate after disconnecting the circuit. However, due to the reset spring of the contactor 400, the mechanism is slightly deformed, the deviation of the circuit board components, etc., it is easy to cause the deviation of the sampling voltage and current, thereby causing the deviation of the action characteristics such as product attraction, retention or release, thereby affecting the verification efficiency of the contactor 400. Therefore, the embodiment of the present application can verify and correct the action characteristics of the contactor through the verification device of the above-mentioned contactor 400.

[0099] The following is a detailed description of how the verification device of the contactor 400 verifies and corrects the contactor 400.

[0100] In the embodiment of the present application, the verification device of the above-mentioned contactor 400 can verify and correct at least the following action characteristics of the contactor 400: the operating state parameters of the contactor 400, such as the pull-in state parameters and the release state parameters, etc.; the action power and action speed of the contactor 400, such as the pull-in power, the pull-in speed, the release power and the release speed, etc.

[0101] First, a process in which the verification device of the contactor 400 verifies and corrects the operating state parameters of the contactor 400 is taken as an example for description.

[0102] In the embodiment of the present application, the host computer 100 may also be configured as follows:

[0103] Regulating the output voltage of the programmable power supply 210;

[0104] Receive the operating state parameters of the contactor 400 fed back by the DI input module 310;

[0105] The operating state parameter of the contactor 400 is verified based on the operating state parameter and the set operating state parameter.

[0106] In the embodiment of the present application, the operating state parameter refers to the parameter of the state type corresponding to the action of the contactor 400. Setting the operating state parameter refers to the set value of the operating state parameter of the contactor 400 pre-stored by the host computer 100. The set value is a value that makes the contactor 400 have better action characteristics. The host computer 100 can change the voltage received by the contactor 400 by adjusting the output voltage of the program-controlled power supply 210, so that the contactor 400 produces an action corresponding to the output voltage. After detecting that the contactor 400 produces an action, the DI input module 310 can obtain the operating state parameter of the contactor 400 and feed the operating state parameter back to the host computer 100. In this way, after receiving the operating state parameter of the contactor 400 fed back by the DI input module 310, the host computer 100 can compare the operating state parameter with the set operating state parameter to verify the operating state parameter of the contactor 400. For example, when the verification result of the host computer 100 is that the operating state parameter does not match the set operating state parameter, it can be determined that the verification item currently corresponding to the contactor 400 is faulty, thereby reporting an error to correct the current verification item of the contactor 400; when the verification result of the host computer 100 is that the operating state parameter matches the set parameter, it can be determined that the verification item currently corresponding to the contactor 400 is qualified, and the next verification can be performed. The host computer 100 of the embodiment of the present application changes the output voltage of the programmable power supply 210 and verifies the operating state parameters of the contactor 400 according to the operating state parameters fed back by the DI input module 310, and can automatically calibrate the operating state characteristics of each contactor 400, and perform timely fault alarms, thereby improving the verification efficiency of the contactor 400.

[0107] In an embodiment of the present application, the operating state parameter may include an attraction state parameter and a release state parameter. The attraction state parameter is a parameter used to characterize the attraction state, and the release state parameter is a parameter used to characterize the release state. For example, the attraction state parameter of the contactor can be characterized by the number 1, and the release state parameter of the contactor can be characterized by the number 0. In this way, when the signal fed back by the DI input module 310 is 1, the host computer 100 can determine that the operating state of the contactor 400 at this time is the attraction state; when the signal fed back by the DI input module 310 is 0, the host computer 100 can determine that the operating state of the contactor 400 at this time is the release state.

[0108] The verification of the operating status parameters is described below with reference to a specific embodiment.

[0109] Figure 4 This is a flow chart of a method for verifying operating state parameters of a contactor according to a specific embodiment of the present application. Figure 4 As shown, in the embodiment of the present application, the host computer 100 can also be configured as a method for verifying operating status parameters. The method can include steps 401-416, which are described in detail below.

[0110] Step 401, controlling the output voltage of the programmable power supply 210 to rise from the initial value to the pull-in threshold;

[0111] Step 402, receiving the operating state parameters of the contactor 400 fed back by the DI input module 310;

[0112] Step 403, determining whether the operating state parameter is a pull-in state parameter, if so, generating a pull-in parameter fault prompt message, otherwise, proceeding to step 404;

[0113] Step 404, controlling the output voltage of the programmable power supply 210 to rise from the pull-in threshold value to the upper limit value;

[0114] Step 405, receiving the operating state parameters of the contactor 400 fed back by the DI input module 310;

[0115] Step 406, determining whether the operating state parameter is a release state parameter; if so, generating a pull-in parameter fault prompt message, otherwise, proceeding to step 407;

[0116] Step 407, controlling the output voltage of the programmable power supply 210 to drop from the upper limit value to the release threshold value;

[0117] Step 408, receiving the operating state parameters of the contactor 400 fed back by the DI input module 310;

[0118] Step 409, determining whether the operating state parameter is a release state parameter; if so, generating a release parameter fault prompt message, otherwise, proceeding to step 410;

[0119] Step 410, controlling the output voltage of the programmable power supply 210 to drop from the release threshold to the minimum release threshold;

[0120] Step 411, receiving the operating state parameters of the contactor 400 fed back by the DI input module 310;

[0121] Step 412, determining whether the operating state parameter is a pull-in state parameter; if so, generating a release parameter fault prompt message, otherwise, proceeding to step 413;

[0122] Step 413, controlling the output voltage of the programmable power supply 210 to rise from the minimum release threshold to a set multiple of the pull-in threshold;

[0123] Step 414, receiving the operating state parameters of the contactor 400 fed back by the DI input module 310;

[0124] Step 415, determining whether the operating state parameter is a release state parameter; if so, generating a pull-in parameter fault prompt message, otherwise, proceeding to step 416;

[0125] Step 416 , completing the verification of the operating state parameters of the contactor 400 .

[0126] In the embodiment of the present application, the verification of the operating state parameters of the contactor 400 may include the verification of the pull-in state parameters and the verification of the release state parameters. Wherein, the verification of the operating state parameters can be divided into the verification of the operating state corresponding to the setting multiple of the pull-in threshold value when the output voltage of the host computer 100 rises from the starting value to the pull-in threshold value, rises from the pull-in threshold value to the upper limit value, drops from the upper limit value to the release threshold value, drops from the release threshold value to the minimum release threshold value, and rises from the minimum release value to the pull-in threshold value. Wherein, the starting value refers to the output voltage sent to the program-controlled power supply 210 by the host computer 100 at the beginning of the verification, such as 0V. The pull-in threshold value refers to the minimum output voltage required by the coil 410 of the contactor 400, so that the contact 430 of the contactor 400 is closed. When the output voltage exceeds the pull-in threshold value, the coil 410 of the contactor 400 will generate enough magnetic field strength to make the moving contact in the contact 430 and the fixed contact pull-in. The upper limit value refers to the maximum output voltage that the coil 410 of the contactor 400 can withstand. When the output voltage exceeds the upper limit, the coil 410 of the contactor 400 will generate too high a magnetic field force, which may cause problems such as contactor failure and contact burnout. Therefore, when the output voltage reaches the upper limit, the output voltage needs to be reduced. The release threshold refers to the minimum voltage required for the contact 430 to switch from the attracted state to the released state after the coil 410 of the contactor 400 disconnects the output voltage. When the output voltage is lower than the release threshold, the magnetic field force of the coil 410 of the contactor 400 is weakened, so that the contact 430 is separated from the attracted state. The minimum release value represents the release performance of the contactor 400, which determines whether the contactor 400 can reliably switch from the attracted state to the released state. If the output voltage is less than the minimum release value, the contactor 400 may not be released normally, causing the circuit to be in a closed state for a long time. Therefore, when the output voltage reaches the minimum release value, the output voltage needs to be increased. In other words, the output voltage needs to change between the minimum release value and the upper limit value to ensure the safe and stable operation of the contactor 400.

[0127] In an embodiment of the present application, the host computer 100 pre-stores the set operating state parameters that the contactor 400 should correspond to in the above five stages. For each stage, if the operating state parameters of the contactor 400 fed back by the DI input module 310 do not match the set operating state parameters, it can be determined that the verification item of the current contactor 400 is faulty, so the host computer 100 can generate a fault prompt information. Among them, the fault prompt information can include a pull-in parameter fault prompt information and a release parameter fault prompt information, and the pull-in parameter fault prompt information is used to indicate a fault in the pull-in state verification, and the release parameter fault prompt information is used to indicate a fault in the release state verification. In an embodiment of the present application, the output voltage is the three stages of rising from the starting value to the pull-in threshold, rising from the pull-in threshold to the upper limit value, and from the minimum release value to the set multiple of the pull-in threshold for the pull-in state verification, and the two stages of falling from the upper limit value to the release threshold and falling from the release threshold to the minimum release threshold for the release state verification. On the contrary, if the operating state parameter of the contactor 400 fed back by the DI input module 310 matches the set operating state parameter, the host computer 100 can control the output voltage of the programmable power supply 210 to change to the output voltage of the next verification stage.

[0128] The following takes the example that the pull-in state parameter is the number 1, the release state parameter is the number 0, and the response speed of a step of 1V can be 1ms to illustrate the verification process of each stage.

[0129] Specifically, in the stage where the output voltage of the host computer 100 rises from the starting value to the pull-in threshold value, at this time, the output voltage has not yet reached the minimum output voltage required by the coil 410 of the contactor 400, and the contact 430 of the contactor 400 is in a released state, so the DI input module 310 should feedback the number 0, indicating that the contactor 400 is in a released state. If the current operating state parameter is 1, it means that the pull-in state fails, so the host computer can generate a pull-in parameter fault prompt information. If the current operating parameter is 0, it means that the verification of the current project is qualified, and the verification of the next stage can be entered.

[0130] In the stage where the output voltage of the host computer 100 rises from the pull-in threshold to the upper limit value, at this time, the output voltage has reached the minimum output voltage required by the coil 410 of the contactor 400, and the contact 430 of the contactor 400 changes from the release state to the pull-in state, therefore, the DI input module 310 should feedback the number 1, indicating that the contactor 400 is in the pull-in state. If the current operating state parameter is 0, it means that the pull-in state fails, therefore, the host computer can generate a pull-in parameter fault prompt information. If the current operating parameter is 1, it means that the verification of the current project is qualified, and the verification of the next stage can be entered.

[0131] In the verification stage when the output voltage of the host computer 100 drops from the upper limit value to the release threshold value, the host computer 100 begins to enter the verification stage of the release state, but the output voltage has not yet reached the minimum voltage required for the contact 430 to switch from the energized state to the released state, so the DI input module should feedback the number 1, indicating that the contactor 400 is still in the energized state. If the current operating state parameter is 0, it means that the release state fails, so the host computer can generate a release parameter failure prompt message. If the current operating parameter is 1, it means that the verification of the current project is qualified and the verification of the next stage can be entered.

[0132] In the verification stage when the output voltage of the host computer 100 drops from the release threshold to the minimum release threshold, the output voltage has reached the minimum voltage required for the contact 430 to switch from the attracted state to the released state. Therefore, the DI input module should feedback the number 0, indicating that the state of the contactor 400 is switched to the released state. If the current operating state parameter is 1, it means that the release state fails, so the host computer can generate a release parameter failure prompt message. If the current operating parameter is 0, it means that the verification of the current project is qualified and the verification of the next stage can be entered.

[0133] In the verification stage when the output voltage of the host computer 100 rises from the minimum release value to the set multiple of the pull-in threshold, the host computer 100 re-enters the verification stage of the pull-in state, that is, the verification of the pull-in state. After exceeding the pull-in threshold, the contactor 400 should re-enter the pull-in state. Therefore, the DI input module should feedback the number 1, indicating that the contactor re-enters the pull-in state. If the current operating state parameter is 0, it means that the pull-in state fails, so the host computer can generate a pull-in parameter fault prompt information. If the current operating parameter is 1, it means that the verification of the current project is qualified, and the verification of the operating state parameter is completed.

[0134] The embodiment of the present application verifies the operating status of the above five stages, and compares the operating status parameters of the contactor 400 that should correspond to each stage with the set operating status parameters, so that it can be known in time whether there is a fault in the pull-in parameter or the release parameter of the contactor 400. In addition, the above process can be pre-specified in the host computer 100. The verification program and the storage setting of the operating state parameters can be realized automatically, thereby improving the efficiency of the operating state verification of the contactor 400.

[0135] The verification device of the contactor 400 of the embodiment of the present application can also verify and correct the action power and action speed. The following describes the process of the verification device of the contactor 400 verifying and correcting the action power of the contactor 400 as an example.

[0136] In the embodiment of the present application, the host computer 100 may also be configured as follows:

[0137] Regulating the output voltage of the programmable power supply 210;

[0138] Obtain the coil current value corresponding to the current output voltage fed back by the current sensor 320;

[0139] Determine the operating power and operating speed of the contactor 400 at the current output voltage according to the coil current value;

[0140] The operating power and the operating speed of the contactor 400 are corrected to the set operating power and the set operating speed, respectively.

[0141] In an embodiment of the present application, the coil current value of the contactor 400 can be used to correct the action power and action speed of the contactor. The action power of the contactor 400 refers to the energy consumed by the contactor 400 to perform an action per unit time, which may include pull-in power and release power. The pull-in power refers to the energy consumed by the contactor 400 during the pull-in process, and the release power refers to the energy consumed by the contactor 400 during the release process. The action power can be obtained according to the current output voltage, action current (i.e., coil current value) and action time. The action speed can be obtained according to the action stroke and action time. Among them, the output voltage and action formation are known, the action current can be obtained according to the value fed back by the current sensor 320, and the action time can be calculated according to the time when the action occurs and the time when the action ends. For example, when the contactor 400 takes a certain action, the host computer 100 can obtain voltage feedback, for example, by obtaining the current status information through the DI input module, and then the host computer 100 can record the start time when the action occurs and the time in place when the action ends, and calculate the action time based on the start time and the time in place.

[0142] The set action power and the set action speed refer to the set values ​​of the action consolidation rate and action speed of the contactor 400 pre-stored by the host computer 100. The set value is a value that makes the contactor 400 have better action characteristics. The host computer 100 can change the voltage received by the contactor 400 by adjusting the output voltage of the programmable power supply 210, so that the contactor 400 produces an action corresponding to the output voltage. The current sensor 320 feeds back the coil current value generated by the current output voltage corresponding action to the host computer 100, and the host computer 100 can determine the action power and action speed under the current output voltage based on the coil current. In this way, after receiving the action power and action speed of the contactor 400 fed back by the current sensor 320, the host computer 100 can compare the action power and action speed with the set action power and action speed respectively based on the action power and action speed to verify and correct the action power and action speed of the contactor 400. For example, when the verification result of the host computer 100 is that the action power does not match the set action power, it is determined that the action power of the contactor 400 at the current output voltage is unqualified, and the host computer 100 can correct the action power to the set action power; for another example, when the verification result of the host computer 100 is that the action speed does not match the set action speed, it is determined that the action speed of the contactor 400 at the current output voltage is unqualified, and the host computer 100 can also correct the action speed to the set action speed.

[0143] In one example, the correction of the action power and action speed can be achieved by changing the duty cycle of the coil control board 440 in the contactor 400 by the host computer 100, thereby changing the coil current value of the contactor 400. The duty cycle refers to the ratio of the high level time of the signal to the cycle time, usually expressed as a percentage. When the duty cycle increases, the output voltage received by the contactor 400 will increase, and conversely, when the duty cycle decreases, the output voltage received by the contactor 400 will decrease. Since the communication module 220 is also connected to the coil control board 440, the host computer 100 can control the coil control board 440 through the communication module 220, thereby adjusting the duty cycle of the coil control board 440. The above-mentioned automatic correction of the action power and action speed of the contactor under each voltage by the host computer 100 based on the set power and set speed is more efficient and accurate compared to the traditional method of manually adjusting the duty cycle, and saves manpower, thereby improving the verification efficiency of the contactor 400.

[0144] The following will first take the correction method of the pull-in power and pull-in speed as an example to illustrate.

[0145] Figure 5 The figure is a flow chart of a method for correcting the pull-in power and pull-in speed of a contactor according to a specific embodiment of the present application. Figure 5As shown, in the embodiment of the present application, the host computer 100 can also be configured as a method for correcting the pull-in power and pull-in speed of the contactor. The method may include steps 501-504, which are described in detail below.

[0146] Step 501, controlling the output voltage of the programmable power supply 210 to rise from a pull-in threshold value to an upper limit value, wherein the pull-in threshold value to the upper limit value include multiple voltage values;

[0147] Step 502: for each voltage value, receive the coil current value fed back by the current sensor 320, and record the start time of the contactor 400 being fed back by the DI input module 310 and the end time of the contactor 400 being fully engaged;

[0148] Step 503, determining the contactor's pull-in power and pull-in speed according to the coil current value, the pull-in start time, and the pull-in completion time;

[0149] Step 504: Correct the pull-in power and pull-in speed of the contactor 400 to the set pull-in power and the set pull-in speed respectively.

[0150] Specifically, the host computer 100 sends the set output voltage to the control program-controlled power supply 210 through the communication module 220, and the output voltage needs to rise from the suction threshold to the upper limit value, so that the state of the contactor 400 changes from the state of starting suction to the state of suction in place. Assuming that the response speed of stepping 1V is 1ms, the output voltage is disconnected for 1s per step, and then connected for 1s according to the voltage at this time, so as to obtain the verification results under multiple voltage values. For each voltage value, the host computer 100 can obtain the coil current value fed back by the current sensor 320, and obtain the suction start time of the contactor 400 starting to suck and the suction in place time of the contactor 400 completing the suction action based on the voltage feedback, and then calculate the suction power and suction speed of the contactor 400 under each voltage. Next, the upper computer 100 compares the calculated pull-in power and pull-in speed with the set pull-in power and the set pull-in speed. If the pull-in power and the pull-in speed do not match the set pull-in power and the pull-in speed, it means that the pull-in power and the pull-in speed at the current output voltage are unqualified. Therefore, the pull-in power and the pull-in speed at the current output voltage need to be corrected.

[0151] In one example, the host computer 100 can set the duty cycle size to the microcontroller unit (MCU) of the coil control board 440 through the communication module 220 to change the size of the coil current value, thereby changing the contactor pull-in power and pull-in speed. In order to stabilize the pull-in power, the duty cycle of the coil control board 440 can be corrected for each 1V voltage. For example, when the pull-in speed at the current voltage is faster than the set pull-in speed, the pull-in speed can be slowed down by reducing the duty cycle of the coil control board 440; when the pull-in speed at the current voltage is slower than the set pull-in speed, the pull-in speed can be accelerated by increasing the duty cycle of the coil control board 440.

[0152] The embodiment of the present application automatically corrects the pull-in power and the pull-in speed of the contactor at each voltage based on the set pull-in power and the set pull-in speed, which can improve the consistency of the pull-in characteristics of each contactor 400 in the mass-produced contactors. Moreover, compared with the traditional method that requires manual adjustment of the pull-in characteristics, it is more efficient and accurate, and saves manpower, thereby improving the verification efficiency of the pull-in characteristics of the contactor 400.

[0153] The following is an example of how to correct the release power and release speed.

[0154] Figure 6 FIG. 1 is a flow chart of a method for correcting the release power and release speed of a contactor according to a specific embodiment of the present application. Figure 6 As shown, in the embodiment of the present application, the host computer 100 can also be configured as a method for correcting the release power and release speed of the contactor. The method may include steps 601-604, which are described in detail below.

[0155] Step 601, controlling the output voltage of the programmable power supply 210 to drop from a release threshold to a minimum release threshold, where the release threshold to the minimum release threshold include multiple voltage values;

[0156] Step 602: for each voltage value, receive the coil current value fed back by the current sensor 320, and record the release start time of the contactor 400 fed back by the DI input module 310 and the release end time of the contactor;

[0157] Step 603, determining the release power and release speed of the contactor 400 according to the coil current value, the release start time and the release completion time;

[0158] Step 604: Correct the release power and release speed of the contactor 400 to the set release power and the set release speed respectively.

[0159] Specifically, the host computer 100 sends the set output voltage to the control program-controlled power supply 210 through the communication module 220, and the output voltage needs to drop from the release threshold to the minimum release value, so that the state of the contactor 400 changes from the state of starting to release to the state of releasing in place. Assuming that the response speed of the step 1V is 40ms, the verification results under multiple voltage values ​​can be obtained. For each voltage value, the host computer 100 can obtain the coil current value fed back by the current sensor 320, and based on the voltage feedback, obtain the release start time when the contactor 400 starts to release and the release in place time when the contactor 400 completes the release action, and then calculate the release power and release speed of the contactor 400 under each voltage. Next, the host computer 100 compares the calculated release power and release speed with the set release power and release speed. When the release power and release speed do not match the set release power and release speed, it is explained that the release power and release speed under the current output voltage are unqualified, and therefore, the release power and release speed under the current output voltage need to be corrected.

[0160] In one example, the host computer 100 can set the duty cycle to the microcontroller unit (MCU) of the coil control board 440 through the communication module 220 to change the coil current value, thereby changing the release power and release speed of the contactor. In order to stabilize the release power, the duty cycle of the coil control board 440 can be corrected for each 1V voltage. For example, if the release speed at the current voltage is faster than the set release speed, the release speed can be slowed down by reducing the duty cycle of the coil control board 440; if the release speed at the current voltage is slower than the set release speed, the release speed can be accelerated by increasing the duty cycle of the coil control board 440.

[0161] The embodiment of the present application automatically corrects the release power and release speed of the contactor at each voltage based on the set release power and the set release speed, which can improve the consistency of the release characteristics of each contactor 400 in the mass-produced contactors. Moreover, compared with the traditional method that requires manual adjustment of the release characteristics, it is more efficient and accurate, and saves manpower, thereby improving the verification efficiency of the release characteristics of the contactor 400.

[0162] Finally, the host computer 100 can read the current between the coil control board 440 and the programmable power supply 210 collected by the current sensor 320, thereby determining the holding power at each voltage value, and feeding it back to the host computer 100 for storage. Thus, the holding power can also be corrected.

[0163] In the embodiment of the present application, the host computer 100 can exchange data with the coil control board 440 through the communication module 220, so the host computer 100 can also verify the characteristics of the coil control board 440. For example, the host computer 100 can also verify the burning characteristics of the coil control board 440 and the bias characteristics of the coil control board 440.

[0164] In the embodiment of the present application, the host computer 100 may also be configured as follows:

[0165] The set action characteristics of the contactor 400 are sent to the coil control board 440 through the communication module 220, so that the coil control board 440 burns the set action characteristics;

[0166] When receiving the burning failure feedback from the coil control board 440, a burning failure prompt message is generated.

[0167] Specifically, the host computer 100 can download the program corresponding to the action characteristics of the contactor 400 such as the closing, holding, and disconnection (i.e., the set action characteristics) to the MCU of the coil control board 440 through the communication module 220, and the coil control board 440 burns the above program. If a burning failure occurs, the coil control board 440 will feedback the burning failure to the host computer 100, and the host computer 100 can generate a burning failure prompt message and perform a burning failure prompt through the interactive module 500. By verifying the burning characteristics, it can be ensured that the coil control board 440 of each contactor 400 can completely receive the set action characteristics, thereby reducing the situation of false detection.

[0168] In the embodiment of the present application, the host computer 100 may also be configured as follows:

[0169] Controlling the output voltage of the programmable power supply 210 through the communication module 220 so as to transmit the output voltage to the coil control board 440 through the programmable power supply 210;

[0170] The receiving coil control board 440 calibrates the calibrated voltage based on the output voltage;

[0171] When the output voltage does not match the calibrated voltage, a voltage fault prompt message is generated.

[0172] Specifically, the host computer 100 can send the set output voltage to the program-controlled power supply 210 through the communication module 220, and the program-controlled power supply transmits the output voltage to the coil control board 440, and then the coil control board 440 calibrates the output voltage to obtain the corresponding calibration voltage. Since the voltage supplied to the coil 410 by the coil control board 440 may have a bias. Therefore, the bias can be changed by comparing the calibration voltage with the output voltage. The host computer 100 determines whether the current output voltage is accurate by comparing the calibration voltage with the output voltage. If the output voltage does not match the calibration voltage, for example, the difference between the output voltage and the calibration voltage is greater than the preset difference, the host computer 100 can generate a voltage fault prompt information, and then perform a voltage fault prompt through the interactive module 500. By checking the bias characteristics, it can be ensured that the voltage output to the coil 410 by the coil control board 440 of each contactor 400 is closer to the output voltage, and the bias is smaller, thereby improving the accuracy of the voltage output of the coil control board 440.

[0173] The verification device of the contactor 400 provided in the embodiment of the present application can not only verify and correct the operating state, working power and working speed of each contactor 400 in the mass-produced contactors 400, but also verify the burning characteristics and bias characteristics of the coil control board 440 in the contactor 400. Thus, it can be ensured that the action characteristics of the mass-produced contactors are consistent and the contactors have higher precision, thereby improving the verification efficiency of the contactors.

[0174] It should be noted that Figure 3 The structural diagram of the contactor verification device shown is only an example of an embodiment of the present application. In addition to the above-mentioned programmable power supply 210, the voltage output module 200 may also select other components that can transmit the output voltage set by the host computer 100 to the contactor 400 to cause the contactor 400 to operate; the DI input module 310 and the current sensor 320 in the feedback module 300 may also be replaced by other components that can feed back the action parameters of the contactor 400 to the host computer 100. Accordingly, in Figures 4 to 6 In the method, the method in which the host computer 100 controls the programmable power supply 210 is only an example of the method in which the host computer 100 controls the voltage output module 200. Similarly, the method in which the host computer 100 receives the action parameters fed back by the DI input module 310 and the current sensor 320 is only an example of the method in which the host computer 100 receives the action parameters fed back by the feedback module 300.

[0175] It should also be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, commodity or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, commodity or device. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the process, method, commodity or device including the elements.

[0176] The above are only embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included within the scope of the claims of the present application.

Claims

1. A contactor calibration device, It is characterized in that It includes a host computer, a voltage output module and a feedback module, wherein the first end of the voltage output module is connected to the host computer, the second end of the voltage output module is connected to the contactor, the feedback module includes a DI input module and a current sensor, the DI input module is connected between the host computer and the contactor, the first end of the current sensor is connected to the host computer, and the second end is respectively connected to the second end of the voltage output module and the contactor, the DI input module is used to feed back the operating state parameter of the contactor to the host computer, and the current sensor is used to feed back the coil current value of the contactor to the host computer; The voltage output module is configured to transmit the output voltage set by the host computer to the contactor so as to cause the contactor to operate; The feedback module is configured to feed back the action parameters of the contactor to the host computer, wherein the action parameters include an operation state parameter and a coil current value of the contactor; The host computer is configured to change the action characteristics of the contactor by controlling the voltage of the voltage output module, and to verify and correct the action characteristics of the contactor according to the action parameters fed back by the feedback module; Wherein, verifying and correcting the action characteristics of the contactor according to the action parameters fed back by the feedback module includes: Control the output voltage of the voltage output module to rise from a pull-in threshold value to an upper limit value, wherein the pull-in threshold value to the upper limit value include multiple voltage values; for each voltage value, receive the coil current value fed back by the current sensor, and record the pull-in start time of the contactor starting to pull in and the pull-in position time of the contactor fed back by the DI input module; determine the pull-in power and pull-in speed of the contactor according to the coil current value, the pull-in start time and the pull-in position time; and correct the pull-in power and pull-in speed of the contactor to the set pull-in power and the set pull-in speed respectively; The output voltage of the voltage output module is controlled to drop from a release threshold to a minimum release threshold, wherein the release threshold to the minimum release threshold include multiple voltage values; for each voltage value, the coil current value fed back by the current sensor is received, and the release start time of the contactor and the release end time fed back by the DI input module are recorded; the release power and release speed of the contactor are determined according to the coil current value, the release start time and the release end time; the release power and release speed of the contactor are respectively corrected to the set release power and the set release speed.

2. The verification device according to claim 1, It is characterized in that The voltage output module includes a programmable power supply and a communication module, wherein a first end of the programmable power supply is connected to the host computer via the communication module; a second end of the programmable power supply is connected to the contactor; The host computer sends the set output voltage to the programmable power supply through the communication module, so that the programmable power supply transmits the output voltage to the contactor.

3. The verification device according to claim 1, It is characterized in that The operating state parameters include pull-in state parameters and release state parameters, and the host computer is further configured as follows: Controlling the output voltage of the voltage output module to rise from a starting value to a pull-in threshold value; Receiving the operating state parameters of the contactor fed back by the DI input module; When the operating state parameter is a pull-in state parameter, generating pull-in parameter fault prompt information; When the operating state parameter is a release state parameter, controlling the output voltage of the voltage output module to rise from the pull-in threshold value to an upper limit value; Receiving the operating state parameters of the contactor fed back by the DI input module; When the operating state parameter is a release state parameter, generating a pull-in parameter fault prompt information; When the operating state parameter is a pull-in state parameter, controlling the output voltage of the voltage output module to drop from the upper limit value to a release threshold value; Receiving the operating state parameters of the contactor fed back by the DI input module; In the case where the operation state parameter is a release state parameter, generating release parameter fault prompt information; When the operating state parameter is a pull-in state parameter, controlling the output voltage of the voltage output module to drop from the release threshold to a minimum release threshold; Receiving the operating state parameters of the contactor fed back by the DI input module; When the operating state parameter is an attraction state parameter, generating a release parameter fault prompt information; When the operating state parameter is a release state parameter, controlling the output voltage of the voltage output module to rise from the minimum release threshold to a set multiple of the pull-in threshold; Receiving the operating state parameters of the contactor fed back by the DI input module; When the operating state parameter is a release state parameter, generating a pull-in parameter fault prompt information; When the operating state parameter is a pull-in state parameter, the operating state parameter of the contactor is verified.

4. The verification device according to claim 1, It is characterized in that The voltage output module includes a programmable power supply and a communication module, wherein a first end of the programmable power supply is connected to the host computer via the communication module; a second end of the programmable power supply is connected to the contactor; The host computer sends the set output voltage to the program-controlled power supply through the communication module, so that the program-controlled power supply transmits the output voltage to the contactor; The contactor comprises a coil, an action system, a contact and a coil control board, wherein the first end of the coil control board is respectively connected to the program-controlled power supply, the current sensor and the communication module, the second end of the coil control board is connected to the coil, and the contact is connected to the DI input module; The programmable power supply transmits the output voltage sent by the host computer to the coil control board, and the coil control board controls the on and off of the coil according to the output voltage, so that the action system moves and the state of the contact changes between the attracted state and the released state.

5. The verification device according to claim 4, It is characterized in that The host computer is also configured as follows: Sending the set action characteristics of the contactor to the coil control board through the communication module, so that the coil control board burns the set action characteristics; When receiving a burning fault feedback from the coil control board, a burning fault prompt message is generated.

6. The verification device according to claim 4, It is characterized in that The host computer is also configured as follows: Controlling the output voltage of the programmable power supply through the communication module, so as to transmit the output voltage to the coil control board through the programmable power supply; receiving a calibrated voltage of the coil control board after calibration based on the output voltage; When the output voltage does not match the calibrated voltage, a voltage fault prompt message is generated.

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