Motor test system

Abstract

The utility model provides a motor test system which comprises a power supply device, two test devices, a transmission shaft system support, a data acquisition module and a centralized control device. The power supply device comprises a power distribution cabinet, a battery simulator connected with the power distribution cabinet, and two high-voltage transfer boxes connected with the power output end of the battery simulator. The two testing devices are used for being connected with two tested objects respectively. Any testing device comprises an inverter and a power analyzer, the input end of the inverter is connected with the output end of the high-voltage transfer box, and the output end of the inverter is used for being connected with a tested object; the power analyzer is respectively connected with the inverter and the measured object and is used for measuring power parameters of the inverter and the measured object; the transmission shaft system support is used for enabling two tested objects to be in transmission connection through a transmission shaft. The data acquisition module is used for acquiring temperature signals, pressure signals and vibration signals of the two inverters and the two measured objects; and the centralized control device is respectively connected with the two inverters, the power analyzer and the data acquisition module.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy motor testing, and in particular to a motor testing system. Background Art

[0002] During the development of the electric drive system of new energy vehicles, a large number of performance, reliability and functional development tests are required to ensure the development quality. In the process of testing the electric drive system of automobiles, it is particularly important to improve the test efficiency and accuracy of the motor. However, in the existing motor test system, a dynamometer is usually used to drag the motor under test to complete various test verification and assessment. As a result, in the cycle endurance test, only one test task can be completed each time, which wastes test resources, resulting in high test costs and low test efficiency. Utility Model Content

[0003] In view of this, an object of the present invention is to provide a motor testing system to reduce the motor testing cost and improve the motor testing efficiency.

[0004] In order to achieve the above purpose, the technical solution adopted by the embodiment of the utility model is as follows:

[0005] The embodiment of the utility model provides a motor testing system, including a power supply device, two testing devices, a transmission shaft system bracket, a data acquisition module and a centralized control device;

[0006] The power supply device includes a power distribution cabinet for accessing the power grid, a battery simulator connected to the power output end of the power distribution cabinet, and two high-voltage transfer boxes respectively connected to the power output ends of the battery simulator;

[0007] The two test devices are used to connect to two objects under test respectively; any test device includes an inverter and a power analyzer, the input end of the inverter is connected to the output end of one of the high-voltage transfer boxes, and the output end is used to connect to an object under test; the power analyzer is connected to the inverter and the object under test respectively, and is used to measure the power parameters of the inverter and the object under test;

[0008] The transmission shaft system bracket is used to connect the two measured objects through the transmission shaft;

[0009] The data acquisition module is used to collect temperature signals, pressure signals and vibration signals of the two inverters and the two measured objects;

[0010] The centralized control device is connected to the two inverters, the power analyzer and the data acquisition module respectively.

[0011] The embodiment of the utility model adopts the motor test system of the above-mentioned architecture. On the one hand, by utilizing the power supply device including the power distribution cabinet, the battery simulator and the high-voltage adapter box as the power supply of the motor test system, various power supply requirements of the motor test system can be met; on the other hand, by configuring the two test devices, access to the two test objects can be achieved for testing. In this way, when it is necessary to test the parameters of a certain motor, the two test objects can be used as motors of the same specification and tested simultaneously. In this way, when the torque control test is performed on one of the motors, the other motor can rotate at any time through the action of the transmission shaft system bracket, and the speed of the other motor can be detected at this time. Therefore, in one test process, two identical motors can be towed against each other, and the speed and torque of the motor can be obtained during the towing process. For cyclic endurance tests, the number of tests can be reduced, thereby saving test resources and test costs, and the test efficiency is also improved; on the other hand, the control of the test and the collection of the test data are coordinated by the centralized control device, which is conducive to ensuring the synchronization and accuracy of the test data.

[0012] Optionally, a capacitor is connected in parallel to the power output end of any high-voltage transfer box.

[0013] Therefore, by connecting a capacitor in parallel to the power output end of any high-voltage transfer box, the voltage stabilizing effect of the capacitor can be used to solve the voltage oscillation problem that is easily generated under severe working conditions, thereby avoiding the inverter error caused by voltage oscillation, the object under test running out of control, and errors in test data.

[0014] Optionally, the signal output end of any high-voltage transfer box is connected to the signal input end of the battery simulator through a voltage regulator, and any high-voltage transfer box has a built-in voltage sensor.

[0015] Therefore, by configuring a voltage regulator between the high-voltage transfer box and the battery simulator, and configuring a voltage sensor in the high-voltage transfer box, the output voltage of the high-voltage transfer box can be detected by the voltage sensor and transmitted to the high-voltage transfer box. When the high-voltage transfer box determines that the voltage output by itself is lower than the voltage corresponding to the voltage output instruction sent by the battery simulator, the output voltage of the battery simulator is increased by the voltage regulator to achieve voltage compensation, so that the output voltage of the high-voltage transfer box is equal to the voltage corresponding to the above voltage instruction, thereby solving the problem of voltage drop caused by the excessive length of the high-voltage power harness, resulting in voltage error, thereby affecting the test efficiency of the object under test.

[0016] Optionally, the voltage regulator is a programmable logic controller.

[0017] Therefore, by using a programmable logic controller as a voltage regulator, the control logic can be simplified, which is beneficial to improving the voltage compensation efficiency.

[0018] Optionally, the power input terminal of any high-voltage transfer box is connected to the power output terminal of the battery simulator through a rotatable bridge harness.

[0019] Therefore, by using a rotatable bridge harness as the power harness between the high-voltage transfer box and the battery simulator, it is possible to avoid laying the power harness on the ground and increasing the environmental risk factor. The high-voltage transfer box can also be made movable at will, and the position of the high-voltage transfer box can be replaced according to different objects under test to make the high-voltage transfer box as close to the inverter as possible, thereby avoiding the voltage drop caused by the excessive length of the power harness and the increased internal resistance between the high-voltage transfer box and the inverter.

[0020] Optionally, any test device further includes a cooling system; the cooling system forms a cooling circulation loop with the inverter and the object under test.

[0021] Therefore, by further configuring a cooling system for cooling the inverter and the object under test, the testing requirements for the object under test in various temperature environments can be met, and the influence of a continuous high temperature environment on the test efficiency and test accuracy can be avoided.

[0022] Optionally, the cooling system is a dual-water-circuit cooling system, and the valve of the cooling system is a solenoid valve.

[0023] Therefore, by adopting a cooling system with dual water circuits and solenoid valve regulation, a rapid transition between high and low temperatures of the object being measured can be achieved.

[0024] Optionally, the data acquisition module is also used to collect the coolant flow of the cooling system.

[0025] Therefore, the coolant flow of the cooling system is also collected through the data acquisition module, which is conducive to the centralized control device to control the cooling system accordingly according to the coolant flow, so as to better meet the test requirements.

[0026] Optionally, the transmission shaft system bracket is configured with a speed sensor and a torque sensor respectively connected to the centralized control device.

[0027] Therefore, by configuring a speed sensor and a torque sensor in the transmission shaft system bracket, it is convenient to collect the torque and speed of the object under test.

[0028] Optionally, the centralized control device is connected to the two inverters via a Can communication module.

[0029] Therefore, by using the Can communication module to realize the communication between the centralized control device and the inverter, it is beneficial to improve the communication stability and meet more communication needs.

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of the structural framework of a motor testing system provided by an embodiment of the utility model is shown;

[0033] Figure 2 A schematic diagram of the structural framework of another motor testing system provided by an embodiment of the utility model is shown.

[0034] Icons: 100-power supply device, 110-power distribution cabinet, 120-battery simulator, 130, 140-high voltage transfer box, 210, 220-test device, 300-transmission shaft bracket, 400-data acquisition module, 500-integrated control device, 600-Can communication module. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the utility model provided in the accompanying drawings is not intended to limit the scope of the utility model claimed for protection, but merely represents selected embodiments of the utility model. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the description of the present utility model, it should be noted that if terms such as orientation are mentioned, for example, "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc., the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the corresponding drawings, or the orientation or position relationship in which the utility model product is usually placed when in use. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" may simply mean that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0040] In the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", "connection", etc. should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an electrical connection; it can be directly connected, or connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0041] In order to solve the technical problem in the related technology that, since the motor testing system usually uses a dynamometer to drag the motor under test to complete various test verification and assessment, in the cycle-type endurance experiment, only one test task can be completed each time, which wastes test resources, causes high test costs, and low test efficiency, the embodiment of the utility model provides a motor testing system. On the one hand, by utilizing a power supply device including a distribution cabinet, a battery simulator and a high-voltage adapter box as the power supply of the motor testing system, various power supply requirements of the motor testing system can be met; on the other hand, by configuring two test devices to achieve access to two tested objects for testing, when it is necessary to test the parameters of a certain motor, The two objects under test use motors of the same specification and are tested simultaneously. In this way, when a torque control test is performed on one of the motors, the other motor will rotate at any time through the action of the transmission shaft system bracket. At this time, the speed of the other motor can be detected. Therefore, in one test, two identical motors can be towed against each other, and the speed and torque of the motors can be obtained during the towing process. For cyclic endurance tests, the number of tests can be reduced, thereby saving test resources and testing costs, and the test efficiency is also improved. On the other hand, the control of the test and the collection of test data are coordinated by a centralized control device, which is conducive to ensuring the synchronization and accuracy of the test data.

[0042] For details, please refer to Figure 1 , Figure 1 It is a schematic diagram of the structural framework of a motor testing system provided by an embodiment of the utility model; the motor testing system includes a power supply device 100, two testing devices (210 and 220), a transmission shaft system bracket 300, a data acquisition module 400 and a centralized control device 500.

[0043] The power supply device 100 includes a power distribution cabinet 110 for accessing a power grid, a battery simulator 120 connected to a power output terminal of the power distribution cabinet 110, and two high-voltage transfer boxes (130 and 140) respectively connected to the power output terminals of the battery simulator 120.

[0044] The two test devices (210 and 220) are used to connect to two objects under test respectively; any test device includes an inverter and a power analyzer, the input end of the inverter is connected to the output end of one of the high-voltage transfer boxes, and the output end is used to connect to an object under test; the power analyzer is connected to the inverter and the object under test respectively, and is used to measure the power parameters of the inverter and the object under test.

[0045] The transmission shaft system bracket 300 is used to connect the two measured objects through the transmission shaft.

[0046] The data acquisition module 400 is used to collect temperature signals, pressure signals and vibration signals of the two inverters of the two test devices (210 and 220) and the two tested objects.

[0047] The centralized control device 500 is respectively connected to the two inverters, the power analyzer and the data acquisition module 400. In some examples, the centralized control device 500 can be a host computer.

[0048] The working principle of the motor testing system in the above embodiment is as follows:

[0049] Before testing the object to be tested, the power distribution cabinet 110 is first connected to the public power grid, and the two objects to be tested are placed in the test space through the transmission shaft system bracket 300, and then the relevant signal ends of the two objects to be tested are respectively connected to the corresponding inverter and power analyzer, and then the entire motor test system is turned on. After the motor test system is turned on, the battery simulator 120 takes power through the power distribution cabinet 110, and supplies power to the two inverters through two high-voltage transfer boxes (130 and 140). In addition, the centralized control device 500 communicates with the two inverters respectively to control the two objects to be tested through the two inverters, for example, one of the objects to be tested is controlled by an inverter for torque control, and the other object to be tested is controlled by another inverter for speed control. During the test process of the two objects to be tested, each power analyzer will measure the power parameters of the inverter and the object to be tested that are connected to each other, wherein the measurement method and power parameters can refer to the relevant technology, which will not be described in detail here, and the measured power parameters are transmitted to the centralized control device 500. During the test, the data acquisition module 400 also collects temperature signals, pressure signals and vibration signals of the two inverters and the two tested objects, and sends the collected signals to the centralized control device 500 . After receiving the data transmitted by the data acquisition module 400 and the power analyzer, the centralized control device 500 will organize, analyze and record the data to ensure the safety of the test and ensure that the test conditions are reasonable, and record relevant test data; wherein, the centralized control device 500 can compare each signal with the corresponding threshold value according to the signal fed back by the data acquisition module 400, and when the value corresponding to the signal is greater than the set threshold value, an alarm is issued. For example, for temperature, pressure and vibration, the corresponding temperature threshold, pressure threshold, vibration amplitude threshold and vibration frequency threshold can be set respectively. If the current temperature exceeds the temperature threshold, an alarm is issued and / or the cooling system is used for cooling and / or the test is stopped; if the current pressure exceeds the pressure threshold, an alarm is issued and / or the test is stopped; if the current vibration frequency exceeds the vibration frequency threshold or the current vibration amplitude exceeds the vibration amplitude threshold, an alarm is issued and / or the test is stopped and / or the operation of reducing the vibration frequency and / or vibration amplitude is performed, thereby ensuring the safety of the test.

[0050] It should be understood that the process of data organization, analysis and recording by the centralized control device 500 mentioned in the present invention does not belong to the content required to be protected by the present invention, and this part of the technical solution is the existing technology, and its technical principle can be referred to the relevant technology, which will not be explained in detail here.

[0051] In addition, to improve the communication stability between the centralized control device 500 and the inverter and meet more communication requirements, please refer to Figure 2 , Figure 2 It is a schematic diagram of the structural framework of another motor testing system provided by an embodiment of the utility model. The centralized control device 500 can be connected to the two inverters through a Can communication module 600.

[0052] In the above, the two objects under test can be two motors of the same specifications. In this way, when a torque control test is performed on one of the motors, the other motor will rotate at any time through the action of the transmission shaft system bracket 300. At this time, the rotation speed of the other motor can be detected. Therefore, in one test process, two identical motors can be towed against each other, and the rotation speed and torque of the motor can be obtained during the towing process. For cyclic endurance tests, the number of tests can be reduced, thereby saving test resources and test costs, and the test efficiency is also improved.

[0053] In other embodiments, one of the two tested objects may be a motor, and the other may be a dynamometer. Thus, more performances of the motor may be tested by the dynamometer, such as the maximum torque and maximum speed of the motor.

[0054] In the above, in order to facilitate the acquisition of torque and speed of the measured object, in some embodiments, the transmission shaft system bracket 300 can be configured with a speed sensor and a torque sensor respectively connected to the centralized control device 500. The speed sensor and the torque sensor can be connected to the centralized control device 500 in a wireless or wired manner.

[0055] In some embodiments, in order to further solve the voltage oscillation problem that is easy to occur in severe working conditions, thereby avoiding the inverter error caused by voltage oscillation, the object under test running out of control and the error in the test data, please continue to refer to Figure 2 , the power output end of any high-voltage transfer box is connected in parallel with a capacitor, so the voltage stabilization effect of the capacitor can be used to reduce voltage fluctuations.

[0056] In some embodiments, in order to further solve the problem that the voltage drop is caused by the long high-voltage power harness, resulting in voltage error, thereby affecting the test efficiency of the object under test, please continue to refer to Figure 2, the signal output end of any high-voltage transfer box is connected to the signal input end of the battery simulator 120 through a voltage regulator, and any high-voltage transfer box has a built-in voltage sensor. Therefore, by configuring a voltage regulator between the high-voltage transfer box and the battery simulator 120, and configuring a voltage sensor in the high-voltage transfer box, the output voltage of the high-voltage transfer box is detected by the voltage sensor and transmitted to the high-voltage transfer box, so that when the high-voltage transfer box determines that the voltage output by itself is less than the voltage corresponding to the voltage output instruction sent by the battery simulator 120, the voltage regulator is used to increase the output voltage of the battery simulator 120 to achieve voltage compensation, so that the output voltage of the high-voltage transfer box is equal to the voltage corresponding to the above voltage instruction, thereby solving the problem of voltage drop caused by the excessive length of the high-voltage power harness, resulting in voltage errors, and thus affecting the test efficiency of the object under test. Among them, the specific voltage compensation scheme can be referred to the relevant technology, which will not be explained in detail here.

[0057] Based on the previous embodiment, in some embodiments, in order to simplify the control logic and improve the voltage compensation efficiency, the voltage regulator is a programmable logic controller.

[0058] In some embodiments, to improve the safety of the high-voltage transfer box, any high-voltage transfer box may also be equipped with a built-in current sensor, and / or an emergency stop button may be provided on the outside of the box of any high-voltage transfer box. When the current detected by the current sensor exceeds the set current threshold, it is considered that there may be a risk of circuit damage, and the high-voltage transfer box may cut off the power supply.

[0059] In some embodiments, in order to avoid the power harness being laid flat on the ground and increasing the environmental risk factor, the power input end of any high-voltage transfer box is connected to the power output end of the battery simulator 120 through a rotatable bridge harness. Therefore, by using a rotatable bridge harness as the power harness between the high-voltage transfer box and the battery simulator 120, it is possible to avoid the power harness being laid flat on the ground and increasing the environmental risk factor, and the high-voltage transfer box can also be made movable at will, and the position of the high-voltage transfer box can be changed according to different objects to be tested, so that the high-voltage transfer box is as close to the inverter as possible, thereby avoiding the voltage drop caused by the excessive length of the power harness between the high-voltage transfer box and the inverter and the increased internal resistance.

[0060] In some embodiments, in order to meet the test requirements of the object under test in various temperature environments and avoid the impact of continuous high temperature environment on test efficiency and test accuracy, please continue to refer to Figure 2 Any test device also includes a cooling system; the cooling system forms a cooling circulation loop with the inverter and the object under test.

[0061] Among them, the cooling system can communicate wirelessly or wired with the integrated control device, so that the integrated control device can adjust the flow of the cooling system according to the test requirements, and then adjust the working environment temperature of the inverter and the object under test. Based on this, in some embodiments, the data acquisition module 400 can also be used to collect the coolant flow of the cooling system. Therefore, the coolant flow of the cooling system is also collected through the data acquisition module 400, which is conducive to the centralized control device 500 to control the cooling system accordingly according to the coolant flow, so as to better meet the test requirements.

[0062] In some embodiments, in order to improve the efficiency of the cooling circulation system in regulating the working environment temperature of the object under test and the inverter, the cooling system may be a dual-water cooling system, and the valve of the cooling system may be a solenoid valve.

[0063] It is worth noting that the technical features or technical solutions in any of the above embodiments of the present invention can be combined or combined with each other as long as there is no contradiction in the combination or combination.

[0064] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A motor testing system, characterized in that: It includes a power supply device, two test devices, a transmission shaft support, a data acquisition module and a centralized control device; The power supply device includes a power distribution cabinet for accessing the power grid, a battery simulator connected to the power output end of the power distribution cabinet, and two high-voltage transfer boxes respectively connected to the power output ends of the battery simulator; The two test devices are used to connect to two objects under test respectively; any test device includes an inverter and a power analyzer, the input end of the inverter is connected to the output end of one of the high-voltage transfer boxes, and the output end is used to connect to an object under test; the power analyzer is connected to the inverter and the object under test respectively, and is used to measure the power parameters of the inverter and the object under test; The transmission shaft system bracket is used to connect the two measured objects through the transmission shaft; The data acquisition module is used to collect temperature signals, pressure signals and vibration signals of the two inverters and the two measured objects; The centralized control device is connected to the two inverters, the power analyzer and the data acquisition module respectively.

2. The motor testing system according to claim 1, characterized in that: A capacitor is connected in parallel to the power output end of any high-voltage transfer box.

3. The motor testing system according to claim 1, characterized in that: The signal output end of any high-voltage transfer box is connected to the signal input end of the battery simulator through a voltage regulator, and any high-voltage transfer box is equipped with a built-in voltage sensor.

4. The motor testing system according to claim 3, characterized in that: The voltage regulator is a programmable logic controller.

5. The motor testing system according to any one of claims 1 to 4, characterized in that: The power input end of any high-voltage transfer box is connected to the power output end of the battery simulator through a rotatable bridge harness.

6. The motor testing system according to claim 1, characterized in that: Any test device further comprises a cooling system; the cooling system forms a cooling circulation loop with the inverter and the object under test.

7. The motor testing system according to claim 6, characterized in that: The cooling system is a dual-water cooling system, and the valve of the cooling system is a solenoid valve.

8. The motor testing system according to claim 6 or 7, characterized in that: The data acquisition module is also used to collect the coolant flow of the cooling system.

9. The motor testing system according to claim 1, characterized in that: The transmission shaft system bracket is configured with a rotation speed sensor and a torque sensor respectively connected to the centralized control device.

10. The motor testing system according to claim 1, characterized in that: The centralized control device is connected to the two inverters via a Can communication module.

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