Electric drive device test system and control method

Abstract

This application relates to an electric drive device testing system and its control method. The electric drive device testing system includes an electric drive device, a testing device, and a power supply device. The output shaft of the testing device is connected to the output shaft of the electric drive device. The power supply device is connected to the electric drive device. A controller is electrically connected to the electric drive device, the testing device, and the power supply device. The controller is used to control the testing device to cut off power when the electric drive device and / or the testing device malfunction during electric drive device testing. This application is used to test the operating performance of an electric drive device.

Description

Technical Field

[0001] This invention relates to the field of vehicle equipment testing technology, specifically to an electric drive device testing system and its control method. Background Technology

[0002] The electric drive system is an important component of a vehicle. During the development of the electric drive system, it is necessary to test the system using testing equipment to determine its reliability. However, if the testing equipment or the electric drive system fails during the testing process and cannot be shut down in time, it will cause damage to the testing equipment and the electric drive system.

[0003] The prior art CN115328073A discloses an electric drive system detection and protection system, an electric drive system detection and protection method, and a processor. It uses a vibration sensor to detect the vibration of the tested object and sends the measured data to a controller. When the vibration of the tested object is abnormal, it controls the first and second relays to disconnect and stop the test of the tested object. The above solution can only continue to detect faults in the electric drive system through a vibration sensor. The detection method is singular and cannot effectively protect the electric drive system according to different fault types. Summary of the Invention

[0004] This application provides a testing system and control method for electric drive devices to solve the problem of ineffective protection for electric drive systems. The technical solution adopted by this invention is as follows:

[0005] According to a first aspect of this application, an electric drive device testing system is provided, comprising an electric drive device, a testing device, and a power supply device. The output shaft of the testing device is connected to the output shaft of the electric drive device. The power supply device is connected to the electric drive device. A controller is electrically connected to the electric drive device, the testing device, and the power supply device, and the controller is used to control the testing device to cut off power when the electric drive device and / or the testing device malfunction during an electric drive testing test.

[0006] With the above settings, when the detection device and the electric drive device malfunction, the electric drive device testing system will not pose a threat to the personnel. Since the power supply is normal, the electric drive device will not be affected by the power supply and will not continuously apply torque to its output shaft. Therefore, by disconnecting the power to the detection device, the output shafts of both the detection device and the electric drive device will naturally stop. Compared to directly controlling the electric drive device and the detection device to stop abruptly (i.e., controlling the output shafts of both the electric drive device and the detection device to stop immediately), this avoids impact on the internal structure of the electric drive device and the detection device, thus protecting them from damage.

[0007] In one possible implementation, the electric drive device testing system further includes a first sensor, a timer, and an emergency stop device. The first sensor detects the rotational speed of the output shaft of the electric drive device. The timer detects the duration of rotation of the output shaft of the testing device after power failure. The emergency stop device limits the rotation of both the output shaft of the electric drive device and the output shaft of the testing device. A controller is electrically connected to the first sensor, the emergency stop device, and the timer; the controller controls the emergency stop device to limit the rotation of both the output shaft of the electric drive device and the output shaft of the testing device after power failure, when the output shaft of the testing device has rotated for a certain period of time, and the rotational speed of the output shaft of the electric drive device is greater than zero.

[0008] With the above settings, after the control and detection device is powered off and its output shaft rotates for a certain period of time, if the output shaft speed of the electric drive device is greater than zero, it indicates that the output shafts of both the detection and electric drive devices cannot stop naturally. This means there is a fault in either the detection or electric drive devices that prevents their output shafts from stopping. Therefore, it is necessary to control the electric drive and detection devices to stop immediately to prevent continuous rotation and thus protect the electric drive device testing system. In this way, by detecting the output shaft speed of the electric drive device, damage to the electric drive device testing system caused by continuous rotation of the detection and drive devices can be further prevented, thus further protecting the electric drive device testing system.

[0009] In one possible implementation, the electric drive device testing system further includes an access control system electrically connected to the controller. The access control system includes a cabin and a door. The cabin forms a test space. The door is connected to the cabin and is used to open or close the test space. The controller is also used to control an emergency stop device to restrict the rotation of the output shaft of the electric drive device and the output shaft of the testing device when the door is open during an electric drive testing test.

[0010] With the above setup, when the door opens to test the space, it indicates that staff may enter the test space, and the detection device or electric drive device may pose a threat to the safety of the staff inside the test space.

[0011] In this way, when the door opens to test the space, the controller will control the emergency stop device to limit the rotation of the output shaft of the electric drive device and the output shaft of the detection device, that is, to control the electric drive device and the detection device to stop suddenly, and control the power supply device to cut off the power to avoid injury to the staff and ensure the safety of the staff inside. In this way, the staff can be protected by judging the status information of the door, and the safe operation of the electric drive device testing system can be guaranteed.

[0012] In one possible implementation, the electric drive device testing system further includes a second sensor for detecting the rotational speed of the output shaft of the testing device. A controller is electrically connected to the second sensor and is used to control the power-off of the testing device when the rotational speed of the output shaft of the testing device is not equal to the rotational speed of the output shaft of the electric drive device. Through this configuration, the controller can control the power-off of the testing device, thereby causing the output shafts of both the testing device and the electric drive device to stop naturally, protecting both the electric drive device and the testing device. This allows for the determination of whether a fault has occurred in the electric drive device or the testing device by detecting the rotational speeds of the output shafts of the testing device and the electric drive device. The controller then controls the electric drive device testing system to make corresponding adjustments, ensuring the safe operation of the electric drive device testing system.

[0013] In one possible implementation, the electric drive testing system further includes a stall device and a third sensor. The stall device restricts the rotation of the output shaft of the electric drive. The third sensor detects the operating status information of the stall device. Both the stall device and the third sensor are electrically connected to a controller. The controller is also used to control the electric drive testing system to perform electric drive testing when the power supply is fault-free and the stall device is not restricting the rotation of the output shaft of the electric drive.

[0014] With the above settings, before conducting the electric drive test, the controller will also obtain the working status information of the stall device through the third sensor, thereby avoiding the stall device restricting the rotation of the output shaft of the electric drive device and affecting the electric drive test. This ensures the normal operation of the electric drive device test system and avoids damage to the stall device and the electric drive device when the test device drives the output shaft of the electric drive device to rotate.

[0015] In one possible implementation, the controller is also used to control the electric drive device test system to perform a stall test when the stall device restricts the rotation of the output shaft of the electric drive device and a stall test is required.

[0016] With the above settings, the controller can ensure that the electric drive device test system can switch normally between the two test modes of electric drive testing and stall testing, avoiding the impact on the normal operation of the electric drive device test system or damage to the electric drive device test system due to the erroneous working state of the stall device, thereby ensuring that the electric drive device test system can perform electric drive testing or stall testing normally, and ensuring the normal operation of the electric drive device test system.

[0017] In one possible implementation, the third sensor includes a distance sensor; the stall device includes a pin, and the output shaft of the electric drive unit has a slot; the distance sensor is used to detect the distance at which the pin is inserted into the slot. When the pin is inserted into the slot, the stall device restricts the rotation of the output shaft of the electric drive unit.

[0018] With the above settings, the distance sensor can detect the distance the pin extends into the slot to determine whether the stall device can limit the rotation of the output shaft of the electric drive device, thus facilitating the controller to obtain the working status information of the stall device through the third sensor.

[0019] In one possible implementation, the controller is also used to control the emergency stop device to restrict the rotation of the output shaft of the electric drive device and the output shaft of the detection device when the electric drive device and / or the detection device malfunction and the door opens the test space during an electric drive device test system.

[0020] With the above settings, the controller will prioritize adjustments to the electric drive device and detection device when the door opens to test the space, thereby prioritizing the safety of the staff and preventing the detection device and drive device from rotating continuously, thus protecting the electric drive device testing system and further improving the safety of the electric drive device testing system.

[0021] According to a second aspect of this application, a control method is provided, applied to the above-mentioned electric drive device testing system, the control method comprising:

[0022] When performing electric drive testing in the electric drive device testing system, if a fault signal is received, the type of fault signal is determined.

[0023] If the fault signal indicates a fault in the electric drive unit and / or the detection unit, then the detection unit will be powered off.

[0024] With the above settings, the electric drive device testing system can make corresponding adjustments based on different types of fault signals. Compared to directly controlling the electric drive device and the detection device to stop abruptly when a fault occurs, this can avoid damage to the internal structure of the electric drive device and the detection device, thus further protecting the electric drive device and the detection device.

[0025] In one possible implementation, after the control detection device is turned off, the control method further includes:

[0026] The rotational speed of the output shaft of the electric drive device is obtained after a preset time, and it is determined whether the rotational speed of the output shaft of the electric drive device is equal to zero.

[0027] If the output shaft of the electric drive unit rotates at a speed greater than zero, then the rotation of the output shaft of the electric drive unit and the output shaft of the detection device is restricted.

[0028] By setting up the above-mentioned system and detecting the rotational speed of the output shaft of the electric drive unit, damage to the electric drive unit testing system caused by the continuous rotation of the detection device and the drive device can be further avoided, thereby further protecting the electric drive unit testing system.

[0029] Therefore, the above-mentioned technical features of this application have the following beneficial effects:

[0030] (1) By setting up an electric drive device testing system, this application can disconnect the power to the testing device when the testing device and the electric drive device malfunction, so that the output shaft of the testing device and the output shaft of the electric drive device will stop naturally. Compared with directly controlling the electric drive device and the testing device to stop abruptly (i.e. controlling the output shaft of the electric drive device and the output shaft of the testing device to stop immediately), it can avoid the internal structure of the electric drive device and the testing device from being impacted, thus avoiding damage to the internal structure of the electric drive device and the testing device and protecting the electric drive device and the testing device.

[0031] (2) By detecting the rotational speed of the output shaft of the electric drive device, this application can further prevent the continuous rotation of the detection device and the drive device from causing damage to the electric drive device test system, thereby further protecting the electric drive device test system.

[0032] (3) By setting up an access control system, this application can determine whether there is a personnel protection fault by judging the status information of the door, thus ensuring the safe operation of the electric drive device test system.

[0033] (4) This application obtains fault signals of the electric drive device and the detection device by detecting the rotational speed of the output shaft of the detection device and the rotational speed of the output shaft of the electric drive device, and then controls the electric drive device test system to make corresponding adjustments through the controller to ensure the safe operation of the electric drive device test system.

[0034] (5) By setting the controller, this application can ensure the normal operation of the electric drive device test system and avoid damage to the stall device and electric drive device when the detection device drives the output shaft of the electric drive device to rotate.

[0035] (6) By setting the controller, this application can ensure that the electric drive device test system can switch normally between the two test modes of electric drive test and stall test, so as to avoid the electric drive device test system being affected or damaged due to the incorrect working state of the stall device, thereby ensuring the normal operation of the electric drive device test system.

[0036] (7) By setting up the controller, this application can prioritize the safety of the staff, thereby further improving the safety of the electric drive device testing system.

[0037] (8) By setting up a third sensor and a stall device, this application can determine whether the stall device can limit the rotation of the output shaft of the electric drive device by detecting the distance of the pin extending into the slot through the distance sensor, thereby facilitating the controller to obtain the working status information of the stall device through the third sensor. Attached Figure Description

[0038] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application, and do not constitute an undue limitation of this application.

[0039] Figure 1 This is a schematic diagram of the connection relationships of the electric drive device testing system;

[0040] Figure 2 This is one of the flowcharts for the control method of the electric drive device test system;

[0041] Figure 3 This is the second flowchart of the control method for the electric drive device test system;

[0042] Figure 4 This is the third flowchart of the control method for the electric drive device test system;

[0043] Figure 5 This is the fourth flowchart of the control method for the electric drive device test system;

[0044] Figure 6 This is the fifth flowchart of the control method for the electric drive device test system;

[0045] Figure 7 This is the sixth flowchart of the control method for the electric drive device test system;

[0046] Figure 8 This is the seventh flowchart of the control method for the electric drive device test system.

[0047] Among them, 10. Electric drive unit testing system; 2. Electric drive unit; 3. Detection device; 4. Power supply unit; 5. Control console; 6. Access control system; 61. Cabin; 62. Door; 63. Monitoring device; 7. Data acquisition device; 8. Cooling device; 9. Stall device. Detailed Implementation

[0048] To enable those skilled in the art to better understand the technical solutions of this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings.

[0049] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0050] The electric drive system is an important component of a vehicle. During the development of the electric drive system, it is necessary to test the system using testing equipment to determine its reliability. However, if the testing equipment or the electric drive system fails during the testing process and cannot be shut down in time, it will cause damage to the testing equipment and the electric drive system.

[0051] Based on this, this application provides an electric drive device testing system 10, such as... Figure 1 As shown, the electric drive device testing system 10 includes an electric drive device 2, a detection device 3, and a power supply device 4. The output shaft of the detection device 3 is connected to the output shaft of the electric drive device 2. The power supply device 4 is electrically connected to the electric drive device 2. The electric drive device testing system 10 is capable of performing electric drive testing experiments.

[0052] With the above settings, when it is necessary to test the working performance of the electric drive device 2, an electric drive test can be performed through the electric drive device test system 10. Specifically, the test device 3 can be started, causing the output shaft of the test device 3 to rotate, thereby driving the output shaft of the electric drive device 2 to rotate. During the rotation of the electric drive device 2, electrical energy is supplied to the electric drive device 2 through the power supply device 4, causing the electric drive device 2 to output a torque in the opposite direction to the rotation of the output shaft of the electric drive device 2. Then, the rotational speed of the output shaft of the test device 3 is measured to determine whether the working performance of the electric drive device 2 is qualified.

[0053] For example, the detection device 3 can drive the output shaft of the detection device 3 and the output shaft of the electric drive device 2 to rotate at a speed of 100 revolutions per minute. The torque output by the electric drive device 2 can theoretically reduce the speed of the output shaft of the detection device 3 and the output shaft of the electric drive device 2 to 90 revolutions per minute. If the actual speed of the output shaft of the detection device 3 is 90 revolutions per minute, it means that the working performance of the output shaft of the detection device 3 is qualified. If the actual speed of the output shaft of the detection device 3 is greater than 90 revolutions per minute, such as 94 revolutions per minute or 96 revolutions per minute, it means that the working performance of the electric drive device 2 is unqualified.

[0054] It should be noted that after the electric drive device 2 outputs torque, there may be a certain error between the actual speed of the output shaft of the detection device 3 and the theoretical speed of the detection device 3. Therefore, within the allowable range of error, although the actual speed of the output shaft of the detection device 3 is greater than the theoretical speed of the detection device 3, the working performance of the electric drive device 2 can still be considered qualified.

[0055] Specifically, the testing device 3 includes a dynamometer.

[0056] In some examples, the electric drive unit 2 has two output shafts, and the corresponding dynamometers are also set to two.

[0057] Based on this, in some embodiments, the electric drive device test system 10 further includes a controller, which is electrically connected to the electric drive device 2, the detection device 3 and the power supply device 4. The controller is used to control the detection device 3 to cut off power when the electric drive device test system 10 is conducting an electric drive test and the electric drive device 2 and / or the detection device 3 malfunctions.

[0058] With the above settings, when the detection device 3 and the electric drive device 2 malfunction, the electric drive device testing system 10 will not pose a threat to the personnel. Since the power supply device 4 is normal, the electric drive device 2 will not be affected by the power supply device 4 and will not continuously apply torque to its output shaft. Therefore, by disconnecting the power to the detection device 3, the output shafts of both the detection device 3 and the electric drive device 2 can be allowed to stop naturally. Compared to directly controlling the electric drive device 2 and the detection device 3 to stop abruptly (i.e., controlling the output shafts of both the electric drive device 2 and the detection device 3 to stop immediately), this avoids impacting the internal structures of the electric drive device 2 and the detection device 3, thus preventing damage to their internal structures and protecting them.

[0059] In some examples, such as Figure 1 As shown, the electric drive device test system 10 also includes a control console 5, with the controller located on the control console 5.

[0060] In some examples, when the power supply 4 fails, the electric drive unit 2 may be affected by the power supply 4 and continuously output torque to the output shaft of the electric drive unit 2, causing the electric drive unit 2 and the detection device 3 to fail to stop normally.

[0061] When the power supply device 4 fails, the controller will control the detection device 3 and the electric drive device 2 to stop suddenly, so as to prevent the detection device 3 and the drive device from continuing to rotate, thereby protecting the staff and the electric drive device test system 10 in a timely manner and preventing injury to the staff or damage to the electric drive device test system 10.

[0062] Based on this, in some embodiments, the electric drive device test system 10 further includes a first sensor for detecting the rotational speed of the output shaft of the electric drive device 2.

[0063] The electric drive device testing system 10 also includes a timer and an emergency stop device. The timer is used to detect the duration of rotation of the output shaft of the testing device 3 after power failure. The emergency stop device is used to limit the rotation of the output shaft of the electric drive device 2 and the output shaft of the testing device 3 (i.e., to control the electric drive device 2 and the testing device 3 to stop immediately).

[0064] The controller is electrically connected to the first sensor, the emergency stop device, and the timer. The controller is used to control the emergency stop device to limit the rotation of the output shaft of the electric drive device 2 and the output shaft of the detection device 3 within a preset time after the detection device 3 is powered off, while the speed of the output shaft of the electric drive device 2 is still greater than zero.

[0065] For example, the preset duration can be 4S, 5S, 6S, etc., and can be adjusted according to the rotational speed of the output shaft of the electric drive device 2 when the detection device 3 is powered off.

[0066] For example, the emergency stop device can be a friction plate, which rubs against the output shaft of the electric drive device 2 and the output shaft of the detection device 3 to quickly stop the rotation of the output shaft of the electric drive device 2 and the output shaft of the detection device 3.

[0067] For example, the emergency stop device can be an electromagnetic clutch, which generates a magnetic field through a coil in the electromagnetic clutch, and uses magnetic force to force the output shaft of the electric drive device 2 and the output shaft of the detection device 3 to stop rotating quickly.

[0068] With the above settings, after the power is cut off to the detection device 3 and the output shaft of the detection device 3 rotates for a certain period of time, if the speed of the output shaft of the electric drive device 2 is greater than zero, it indicates that the output shafts of the detection device 3 and the electric drive device 2 cannot stop naturally. That is, there is a fault in the detection device 3 and the electric drive device 2 that causes the output shafts of the detection device 3 and the electric drive device 2 to be unable to stop. Therefore, it is necessary to control the electric drive device 2 and the detection device 3 to stop urgently to prevent the detection device 3 and the drive device from continuing to rotate, thereby protecting the electric drive device test system 10.

[0069] In this way, by detecting the rotational speed of the output shaft of the electric drive device 2, damage to the electric drive device test system 10 caused by the continuous rotation of the detection device 3 and the drive device can be further avoided, thereby further protecting the electric drive device test system 10.

[0070] It should be noted that after the control detection device 3 is de-energized and the output shaft of the detection device 3 has been rotating for a certain period of time, if the speed of the output shaft of the electric drive device 2 is zero at this time, it means that the output shafts of the detection device 3 and the electric drive device 2 have naturally stopped rotating, and the power supply device 4 can be de-energized to inspect the electric drive device test system 10.

[0071] In some embodiments, such as Figure 1 As shown, the electric drive device testing system 10 also includes an access control system 6, which is electrically connected to the controller. The access control system 6 includes a cabin 61 and a door 62. The cabin 61 forms a testing space. The door 62 is connected to the cabin 61 and is used to open or close the testing space.

[0072] The controller is also used to control the emergency stop device to restrict the rotation of the output shaft of the electric drive device 2 and the output shaft of the detection device 3 when the electric drive device test system 10 is conducting an electric drive test and the door 62 opens the test space.

[0073] It is understandable that the electric drive device 2, the detection device 3, and the power supply device 4 are all located within the test space.

[0074] It is understandable that the number of gates 62 can be one or more. During the operation of the electric drive device test system 10, when any one of the multiple gates 62 opens the test space, the controller will control the emergency stop device to restrict the rotation of the output shaft of the electric drive device 2 and the output shaft of the detection device 3.

[0075] With the above settings, when the door 62 opens the test space, it indicates that personnel may enter the test space, and the detection device 3 or electric drive device 2 may pose a threat to the safety of the personnel in the test space.

[0076] In this way, when the door 62 opens the test space, the controller will control the emergency stop device to limit the rotation of the output shaft of the electric drive device 2 and the output shaft of the detection device 3, that is, control the electric drive device 2 and the detection device 3 to stop suddenly, and control the power supply device 4 to cut off the power to avoid injury to the staff and ensure the safety of the staff inside. In this way, the staff can be protected by judging the status information of the door 62, and the safe operation of the electric drive device test system 10 can be guaranteed.

[0077] In some examples, such as Figure 1 As shown, the control console 5 is located outside the cabin 61.

[0078] Based on the above, in some examples, such as Figure 1 As shown, the access control system 6 also includes a monitoring device 63, which is located in the test space and is used to monitor whether there are staff members in the test space.

[0079] The monitoring device 63 is electrically connected to the controller, which is used to control the emergency stop device to limit the rotation of the output shaft of the electric drive device 2 and the output shaft of the detection device 3 when there are personnel in the test space.

[0080] With the above settings, when there are staff members in the test space, the controller will control the electric drive device 2 and the detection device 3 to stop suddenly, and control the power supply device 4 to cut off the power, thereby ensuring the safety of the staff members in the test space.

[0081] By setting up the access control system 6, the safety of staff can be ensured, and staff can be prevented from entering the test space or staying in the test space and being injured by the running electric drive device test system 10.

[0082] In some embodiments, the electric drive device testing system 10 further includes a second sensor for detecting the rotational speed of the output shaft of the detection device 3.

[0083] The controller is electrically connected to the second sensor and is used to control the power off of the detection device 3 when the rotational speed of the output shaft of the detection device 3 is not equal to the rotational speed of the output shaft of the electric drive device 2.

[0084] With the above settings, since the output shaft of the testing device 3 is connected to the output shaft of the electric drive device 2 when the electric drive device testing system 10 is conducting an electric drive test, when the speed of the output shaft of the testing device 3 is not equal to the speed of the output shaft of the electric drive device 2, it indicates that there is a fault in the connection between the output shaft of the testing device 3 and the output shaft of the electric drive device 2, and the testing device 3 and the electric drive device 2 need to be repaired.

[0085] In this way, the controller will cut off the power to the detection device 3, thereby causing the output shafts of the detection device 3 and the electric drive device 2 to stop naturally, thus protecting the electric drive device 2 and the detection device 3. In this way, by detecting the rotational speed of the output shafts of the detection device 3 and the electric drive device 2, it is possible to determine whether the electric drive device 2 and the detection device 3 have malfunctioned. Then, the controller will control the electric drive device testing system 10 to make corresponding adjustments to ensure the safe operation of the electric drive device testing system 10.

[0086] In some examples, the detection device 3 can be judged to be faulty by judging the difference between the actual speed or torque of the output shaft of the detection device 3 and the target speed or torque of the output shaft of the detection device 3. If the difference between the actual speed or torque of the output shaft of the detection device 3 and the target speed or torque of the output shaft of the detection device 3 is too large or too small, it indicates that the detection device 3 is faulty.

[0087] In some examples, the electric drive unit 2 can feed back the rotational speed of the output shaft of the electric drive unit 2 to the controller. The difference between the actual rotational speed of the output shaft of the electric drive unit 2 and the rotational speed fed back to the controller by the electric drive unit 2 can be used to determine whether the electric drive unit 2 has malfunctioned. If the difference between the actual rotational speed of the output shaft of the electric drive unit 2 and the rotational speed fed back to the controller by the electric drive unit 2 is too large or too small, it indicates that the electric drive unit 2 has malfunctioned.

[0088] In some examples, such as Figure 1 As shown, the electric drive unit testing system 10 also includes a data acquisition device 7, which is electrically connected to the electric drive unit 2 and to the controller. The data acquisition device 7 is used to acquire information from the electric drive unit 2 and determine whether the electric drive unit 2 has malfunctioned. When the electric drive unit 2 malfunctions, it sends a fault signal to the controller so that the controller can receive the fault signal.

[0089] Specifically, the CAN signal, vibration amplitude, and temperature of the electric drive unit 2 can be collected to determine whether the electric drive unit 2 has malfunctioned, and a fault signal can be sent to the controller when the electric drive unit 2 malfunctions.

[0090] In some examples, such as Figure 1 As shown, the electric drive device test system 10 also includes a cooling device 8, which is connected to the electric drive device 2 and electrically connected to the controller. The cooling device 8 is used to drive the coolant to circulate between the cooling device 8 and the electric drive device 2 to absorb the heat in the electric drive device 2 and cool the electric drive, thereby ensuring the normal function of the electric drive device 2.

[0091] When the electric drive device test system 10 is conducting an electric drive test, the temperature of the coolant at multiple locations on the cooling device 8 and the electric drive device 2 can be detected, such as the inlet and outlet of the electric drive device 2, and the inlet and outlet of the cooling device 8. If the difference between the actual temperature of the coolant and the target temperature is too large or too small, it indicates that the cooling device 8 has malfunctioned. The cooling device 8 will send a fault signal to the controller, and the controller will also control the detection device 3 to cut off the power.

[0092] Based on this, in some examples, the controller is also used to control the emergency stop device to restrict the rotation of the output shaft of the electric drive device 2 and the output shaft of the detection device 3 when the electric drive device test system 10 is conducting an electric drive test, and the door 62 opens the test space.

[0093] With the above settings, if the electric drive device 2 and / or the detection device 3 malfunction during the process of the controller controlling the electric drive device 2 and the detection device 3 to stop suddenly when the door 62 first opens the test space, the controller will continue to control the electric drive device 2 and the detection device 3 to stop suddenly and control the power supply device 4 to cut off the power.

[0094] If the test space is opened by the door 62 while the controller is controlling the power off of the detection device 3 due to a malfunction of the electric drive device 2 and / or the detection device 3, the controller will then control the electric drive device 2 and the detection device 3 to stop urgently.

[0095] In this way, when the door 62 opens the test space, the controller will prioritize the adjustment of the electric drive device 2, the detection device 3, etc., thereby prioritizing the safety of the staff and preventing the detection device 3 and the drive device from rotating continuously, thus protecting the electric drive device test system 10 and further improving the safety of the electric drive device test system 10.

[0096] Building upon the above, in some examples, the controller is also used to control the electric drive device test system to perform electric drive testing when the power supply device 4 is not faulty. It is understood that when the electric drive device test system 10 is not running, the controller will not receive fault signals from the detection device 3, the electric drive device 2, or the power supply device 4.

[0097] With the above settings, before the electric drive device testing system 10 performs the electric drive test, the status information of the door 62 can be detected to determine whether the door 62 has opened the test space. If the door 62 has opened the test space, it means that performing the electric drive test at this time will pose a threat to the safety of the staff. Therefore, the controller will control the electric drive device testing system 10 to shut down, thereby avoiding the electric drive device testing system 10 from starting and causing harm to the staff.

[0098] When the door 62 closes the test space, it means that the electric drive test can be carried out normally. The controller will then control the detection device 3, drive device and power supply device 4 to start, so as to carry out the electric drive test.

[0099] In this way, the safety of the staff can be better protected by determining whether the door 62 is open to test the electric drive before the test is conducted. This improves the safety of the staff and enhances the safety of the electric drive device test system 10.

[0100] In some embodiments, such as Figure 1 As shown, the electric drive device test system 10 also includes a stall device 9, which can restrict the rotation of the output shaft of the electric drive device 2.

[0101] When the stall device 9 restricts the rotation of the output shaft of the electric drive device 2, the electric drive device test system 10 can perform a stall detection test.

[0102] Specifically, when the stall device 9 restricts the rotation of the output shaft of the electric drive device 2, the electric drive device 2 cannot drive the output shaft of the electric drive device 2 to rotate. At this time, the power supply device 4 can supply power to the electric drive device 2, so that the electric drive device 2 outputs torque to the output shaft of the electric drive device 2. By comparing the detected actual torque output by the electric drive device 2 with the target torque output by the electric drive device 2, it is determined whether the difference between the actual torque output by the electric drive device 2 and the target torque output by the electric drive device 2 is too large or too small. If the difference between the actual torque output by the electric drive device 2 and the target torque output by the electric drive device 2 is within the normal range, it indicates that the working performance of the electric drive device 2 is qualified. If the difference between the actual torque output by the electric drive device 2 and the target torque output by the electric drive device 2 is too large or too small, it indicates that the working performance of the electric drive device 2 is unqualified.

[0103] In some implementations, the electric drive unit test system 10 also includes a third sensor for detecting the operating status information of the stall device 9. Both the stall device 9 and the third sensor are electrically connected to the controller.

[0104] The controller is also used to control the electric drive device test system 10 to perform electric drive test when the power supply device 2 is not faulty and the stall device 9 does not restrict the rotation of the output shaft of the electric drive device 2.

[0105] With the above settings, before conducting the electric drive test, the controller will also obtain the working status information of the stall device 9 through the third sensor, thereby preventing the stall device 9 from restricting the rotation of the output shaft of the electric drive device 2 and affecting the electric drive test. This ensures the normal operation of the electric drive device test system 10 and prevents damage to the stall device 9 and the electric drive device 2 when the test device 3 drives the output shaft of the electric drive device 2 to rotate.

[0106] In some embodiments, the third sensor includes a distance sensor. The stall device 9 includes a pin, and the output shaft of the electric drive device 2 has a slot. The distance sensor is used to detect the distance at which the pin is inserted into the slot. When the pin is inserted into the slot, the stall device 9 restricts the rotation of the output shaft of the electric drive device 2.

[0107] In this way, the distance sensor can detect the distance the pin extends into the slot to determine whether the stall device 9 can limit the rotation of the output shaft of the electric drive device 2, thus making it convenient for the controller to obtain the working status information of the stall device 9 through the third sensor.

[0108] In some examples, the electric drive unit 2 has two output shafts, and the corresponding stall device 9 also has two shafts.

[0109] Based on this, in some embodiments, the controller is also used to control the electric drive device testing system 10 to perform a stall test when the stall device 9 restricts the rotation of the output shaft of the electric drive device 2 and a stall test is required. With the above settings, when the stall device 9 restricts the rotation of the output shaft of the electric drive device 2, it can be determined whether the stall device 9 is in the required position based on whether a stall test is required. If a stall test is required, the stall device 9 has already restricted the rotation of the output shaft of the electric drive device 2, and the stall test can be performed normally. If a stall test is not required, it indicates that the stall device 9 will affect the normal operation of the electric drive device testing system 10, therefore the electric drive device testing system 10 needs to be shut down.

[0110] In this way, the controller can ensure that the electric drive device test system 10 can switch normally between the two test modes of electric drive test and stall test, and avoid the electric drive device test system 10 from being affected or damaged due to the erroneous working state of the stall device 9. This ensures that the electric drive device test system 10 can carry out electric drive test or stall test normally, and ensures the normal operation of the electric drive device test system 10.

[0111] This application also provides a control method for the above-mentioned electric drive device test system 10, such as... Figure 2 As shown, the control methods include:

[0112] S01: If a fault signal is received during an electric drive test in the electric drive device test system 10, then execute S02: Determine the type of fault signal.

[0113] If the fault signal is a fault in power supply device 4, then execute S03: restrict the rotation of the output shaft of electric drive device 2 and the output shaft of detection device 3.

[0114] If the fault signal indicates a fault in the electric drive unit 2 and / or the detection unit 3, then execute S04: Control the detection unit 3 to disconnect from power.

[0115] With the above settings, the electric drive device test system 10 can make corresponding adjustments according to different types of fault signals. Compared with directly controlling the electric drive device 2 and the detection device 3 to stop abruptly when a fault occurs, this can avoid damage to the internal structure of the electric drive device 2 and the detection device 3, thereby further protecting the electric drive device 2 and the detection device 3.

[0116] In some embodiments, such as Figure 3 As shown, the control method also includes:

[0117] S05: Obtain the rotational speed of the output shaft of the electric drive device 2 after a preset time, and execute S06: Determine whether the rotational speed of the output shaft of the electric drive device 2 is equal to zero.

[0118] If the output shaft speed of electric drive device 2 is zero, then execute S07: Control power supply device 4 to cut off power.

[0119] If the rotational speed of the output shaft of the electric drive device 2 is greater than zero, then execute S08: restrict the rotation of the output shaft of the electric drive device 2 and the output shaft of the detection device 3.

[0120] In this way, by detecting the rotational speed of the output shaft of the electric drive device 2, damage to the electric drive device test system 10 caused by the continuous rotation of the detection device 3 and the drive device can be further avoided, thereby further protecting the electric drive device test system 10.

[0121] Based on this, in some examples, such as Figure 4 As shown, the control method also includes:

[0122] S09: If the electric drive device test system 10 does not perform an electric drive test, determine whether to perform an electric drive test.

[0123] If an electric drive test is to be performed, execute S10: determine whether the door 62 has opened the test space.

[0124] If the door 62 opens the test space, then execute S11: Control the electric drive device test system 10 to close.

[0125] If the test space is not opened by the door 62, then execute S12: control the electric drive device test system 10 to perform an electric drive test.

[0126] In this way, the safety of the staff can be better protected by determining whether the door 62 is open to test the electric drive before the test is conducted. This improves the safety of the staff and enhances the safety of the electric drive device test system 10.

[0127] In some examples, such as Figure 4 As shown, if no electric drive test is performed, then execute S11: Control the electric drive device test system 10 to shut down.

[0128] Based on the above, in some examples, such as Figure 5 As shown, if the door 62 does not open the test space, the control of the electric drive device test system 10 to perform an electric drive test includes:

[0129] If no fault signal of the first type of fault is received, then execute S13: determine whether the stall device 9 restricts the rotation of the output shaft of the electric drive device 2.

[0130] If the stall device 9 does not restrict the rotation of the output shaft of the electric drive device 2, then execute S12: control the electric drive device test system 10 to perform an electric drive test.

[0131] With the above settings, before conducting the electric drive test experiment, the controller will also obtain the working status information of the stall device 9, thereby preventing the stall device 9 from restricting the rotation of the output shaft of the electric drive device 2 and affecting the electric drive test experiment. This ensures the normal operation of the electric drive device test system 10 and prevents damage to the stall device 9 and the electric drive device 2 when the test device 3 drives the output shaft of the electric drive device 2 to rotate.

[0132] In some examples, such as Figure 5 As shown, if the stall device 9 restricts the rotation of the output shaft of the electric drive device 2, then S11 is executed: the electric drive device test system 10 is shut down.

[0133] In some examples, such as Figure 6 As shown, the control method also includes:

[0134] If the stall device 9 restricts the rotation of the output shaft of the electric drive device 2, then execute S14: determine whether a stall test is required.

[0135] If a stall test is required, execute S15: Control the electric drive device test system 10 to perform a stall test.

[0136] If a stall test is not required, execute S11: Control the electric drive device test system 10 to shut down.

[0137] With the above settings, the controller can ensure that the electric drive device test system 10 can switch normally between the two test modes of electric drive test and stall test, and avoid the electric drive device test system 10 from being affected or damaged due to the erroneous working state of the stall device 9, thereby ensuring the normal operation of the electric drive device test system 10.

[0138] In some examples, such as Figure 6 As shown, if the electric drive test is not performed, then execute S14: determine whether a stall test is required.

[0139] In other examples, it can be determined first whether a stall test is needed, and then whether the stall device 9 is functioning normally, such as... Figure 7 As shown, the control methods include:

[0140] S09: When the electric drive device test system 10 is not running, determine whether to perform an electric drive test.

[0141] If an electric drive test is to be performed, execute S10: determine whether the door 62 has opened the test space.

[0142] If the door 62 opens the test space, then execute S11: Control the electric drive device test system 10 to close.

[0143] If the test space is not opened by the door 62, then execute S13: determine whether the stall device 9 restricts the rotation of the output shaft of the electric drive device 2.

[0144] If the stall device 9 does not restrict the rotation of the output shaft of the electric drive device 2, then execute S12: control the electric drive device test system 10 to perform an electric drive test.

[0145] If the electric drive test is not performed, then execute S14: determine whether to perform a stall test.

[0146] If a stall test is performed, then execute S13: determine whether the stall device 9 restricts the rotation of the output shaft of the electric drive device 2.

[0147] If the stall device 9 restricts the rotation of the output shaft of the electric drive device 2, then S15 is executed: control the electric drive device test system 10 to perform a stall detection test.

[0148] If a stall test is not performed, execute S11: Control the electric drive device test system 10 to shut down.

[0149] In this way, the controller can also ensure that the electric drive device test system 10 can switch normally between the two test modes of electric drive test and stall test, thus ensuring the normal operation of the electric drive device test system 10.

[0150] In some examples, such as Figure 8 As shown, the control method of the electric drive device test system 10 includes:

[0151] S09: When the electric drive device test system 10 is not running, determine whether to perform an electric drive test.

[0152] If an electric drive test is to be performed, execute S10: determine whether the door 62 has opened the test space.

[0153] If the door 62 opens the test space, then execute S11: Control the electric drive device test system 10 to close.

[0154] If the test space is not opened by the door 62, then execute S13: determine whether the stall device 9 restricts the rotation of the output shaft of the electric drive device 2.

[0155] If the stall device 9 does not restrict the rotation of the output shaft of the electric drive device 2, then execute S12: control the electric drive device test system 10 to perform an electric drive test.

[0156] S01: If a fault signal is received during an electric drive test in the electric drive device test system 10, then S02: Determine the type of fault signal.

[0157] If the fault signal is a fault in power supply device 4, then execute S03: restrict the rotation of the output shaft of electric drive device 2 and the output shaft of detection device 3.

[0158] If the fault signal indicates a fault in the electric drive unit 2 and / or the detection unit 3, then execute S04: Control the detection unit 3 to disconnect from power.

[0159] Execute S05: Obtain the rotational speed of the output shaft of the electric drive device 2 after a preset time. Execute S06: Determine whether the rotational speed of the output shaft of the electric drive device 2 is equal to zero.

[0160] If the output shaft speed of electric drive device 2 is zero, then execute S07: Control power supply device 4 to cut off power.

[0161] If the rotational speed of the output shaft of the electric drive device 2 is greater than zero, then execute S08: restrict the rotation of the output shaft of the electric drive device 2 and the output shaft of the detection device 3.

[0162] If the stall device 9 restricts the rotation of the output shaft of the electric drive device 2, then execute S14: determine whether a stall test is required.

[0163] If a stall test is required, execute S15: Control the electric drive device test system 10 to perform a stall test.

[0164] If a stall test is not required, execute S11: Control the electric drive device test system 10 to shut down.

[0165] If the electric drive test is not performed, then execute S14: determine whether a stall test is required.

[0166] With the above settings, the controller can ensure that the electric drive device test system 10 can switch normally between the two test modes of electric drive detection test and stall test. In the process of electric drive detection test, if the electric drive device test system 10 fails, it can control the electric drive device test system 10 to make corresponding adjustments according to the fault type, so as to protect the detection device 3, electric drive device 2 and power supply device 4 in the electric drive device test system 10.

[0167] This application also provides an electronic device, including a processor, a memory, and a bus. The processor and the memory can be connected via the bus.

[0168] A processor is the control center of a communication device. It can be a single processor or a collective term for multiple processing elements. For example, a processor can be a general-purpose central processing unit (CPU) or other general-purpose processors. A general-purpose processor can be a microprocessor or any conventional processor.

[0169] As one embodiment, the processor may include one or more CPUs.

[0170] The memory may be read-only memory (ROM) or other types of static storage devices that can store static information and instructions, random access memory (RAM) or other types of dynamic storage devices that can store information and instructions, electrically erasable programmable read-only memory (EEPROM), disk storage media or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, but is not limited thereto.

[0171] As one possible implementation, the memory can exist independently of the processor. The memory can be connected to the processor via a bus and used to store instructions or program code. When the processor calls and executes the instructions or program code stored in the memory, it can implement the sensor determination method provided in the embodiments of this application.

[0172] In another possible implementation, the memory can also be integrated with the processor.

[0173] Specifically, the bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. This bus can be divided into address bus, data bus, control bus, etc.

[0174] In some examples, electronic devices may also include communication interfaces.

[0175] Specifically, the communication interface is used to connect with other devices via a communication network. This communication network can be Ethernet, a wireless access network, a wireless local area network (WLAN), etc. The communication interface may include a receiving unit for receiving data and a transmitting unit for sending data.

[0176] In one design, the communication interface in the electronic device provided in this application embodiment can also be integrated into the processor.

[0177] In another hardware structure of the electronic device provided in this application embodiment, the electronic device may include a processor and a communication interface. The processor is coupled to the communication interface.

[0178] The functions of the processor can be found in the processor description above. In addition, the processor also has storage functions, which can be found in the memory function description above.

[0179] The communication interface is used to provide data to the processor. This communication interface can be an internal interface of the communication device or an external interface of the communication device.

[0180] This application also provides a computer-readable storage medium storing instructions. When a computer executes these instructions, the computer performs each step of the compressor control method flow shown in the above method embodiments.

[0181] This application also provides a computer program product containing instructions that, when executed on a computer, cause the computer to perform the compressor control method described in the above method embodiments.

[0182] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An electric drive device testing system characterized by comprising: The electric drive device test system comprises: an electric drive device (2); a detection device (3), an output shaft of the detection device (3) being connected with an output shaft of the electric drive device (2); a power supply device (4), the power supply device (4) being electrically connected with the electric drive device (2); a controller, the controller being electrically connected with the electric drive device (2), the detection device (3) and the power supply device (4), the controller being used for controlling the detection device (3) to be powered off when the electric drive device test system is performing an electric drive detection test and the electric drive device (2) and / or the detection device (3) is in failure; a first sensor, the first sensor being used for detecting a rotating speed of the output shaft of the electric drive device (2); a timer, the timer being used for detecting a time length of the output shaft of the detection device (3) rotating after the detection device (3) is powered off; an emergency stop device, the emergency stop device being used for limiting the output shaft of the electric drive device (2) and the output shaft of the detection device (3) from rotating; the controller being electrically connected with the first sensor, the emergency stop device and the timer, the controller being used for controlling the emergency stop device to limit the output shaft of the electric drive device (2) and the output shaft of the detection device (3) from rotating when the time length of the output shaft of the detection device (3) rotating after the detection device (3) is powered off reaches a preset time length and the rotating speed of the output shaft of the electric drive device (2) is still greater than zero.

2. The electrical drive device test system of claim 1, wherein, Further comprising: an access control system (6), the access control system (6) being electrically connected with the controller, the access control system (6) comprising: a cabin body (61), the cabin body (61) being formed with a test space; a door body (62), the door body (62) being connected with the cabin body (61) and being used for opening or closing the test space; the controller being further used for controlling the emergency stop device to limit the output shaft of the electric drive device (2) and the output shaft of the detection device (3) from rotating when the electric drive device test system is performing an electric drive detection test and the door body (62) opens the test space.

3. The electrical drive device test system of claim 1, wherein, Further comprising a second sensor, the second sensor being used for detecting a rotating speed of the output shaft of the detection device (3); the controller being electrically connected with the second sensor and being used for controlling the detection device (3) to be powered off when the rotating speed of the output shaft of the detection device (3) is not equal to the rotating speed of the output shaft of the electric drive device (2).

4. The electrical drive device test system according to any one of claims 1-3, characterized in that, The electric drive device test system further comprises: a locked-rotating device (9), the locked-rotating device (9) being capable of limiting the output shaft of the electric drive device (2) from rotating; a third sensor, the third sensor being used for detecting working state information of the locked-rotating device (9); the locked-rotating device (9) and the third sensor being electrically connected with the controller; the controller being further used for controlling the electric drive device test system to perform an electric drive detection test when the power supply device (4) is not in failure and the locked-rotating device (9) does not limit the output shaft of the electric drive device (2) from rotating.

5. The electrical drive device test system of claim 4, wherein, The controller is further configured to control the electric drive testing system to perform the stall test when the stall device (9) limits the rotation of the output shaft of the electric drive device (2) and a stall test is required.

6. The electrical drive device test system of claim 4, wherein, The stall device (9) comprises a plug, and the output shaft of the electric drive device (2) is provided with a slot; the third sensor comprises a distance sensor; the distance sensor is configured to detect the distance between the plug and the slot; when the plug is inserted into the slot, the stall device (9) limits the rotation of the output shaft of the electric drive device (2).

7. The electrical drive device test system of claim 2, wherein, The controller is further configured to control the emergency stop device to limit the rotation of the output shaft of the electric drive device (2) and the output shaft of the detection device (3) when the electric drive testing system performs the electric drive test, the electric drive device (2) and / or the detection device (3) fails, and the door body (62) opens the test space.

8. A control method characterized by, The control method is applied to the electric drive testing system according to any one of claims 1-7, and the control method comprises: When the electric drive testing system performs the electric drive test, if a fault signal is received, the type of the fault signal is determined; If the fault signal is a fault of the electric drive device (2) and / or the detection device (3), the detection device (3) is controlled to be powered off.

9. The control method according to claim 8, characterized by, After the detection device (3) is controlled to be powered off, the control method further comprises: The rotation speed of the output shaft of the electric drive device (2) is obtained after a preset time period, and it is determined whether the rotation speed of the output shaft of the electric drive device (2) is equal to zero; If the rotation speed of the output shaft of the electric drive device (2) is greater than zero, the rotation of the output shaft of the electric drive device (2) and the output shaft of the detection device (3) is limited.

Images