An automated test device for the startup of a fan motor

Abstract

The present invention provides an automated test device for starting a fan motor. The device includes an input power supply, a controller under test, a reverse controller, an automatic switching device, and a motor. The input power supply supplies power to the controller under test, the reverse controller, and the automatic switching device. Both the controller under test and the reverse controller are connected to the automatic switching device through three-phase lines, and the automatic switching device is connected to the motor through three-phase lines. The output line sequence of the reverse controller is opposite to that of the controller under test, and it controls the motor to reverse. The controller under test is the object to be tested and starts after the fan blades of the motor reverse. Through the technical solution of the present invention, the defects of the prior art that the process is repeated and cumbersome are overcome, the automatic switching between the motor and the output ends of the two controllers is realized, the motor automatically switches its rotation direction, so as to achieve the start-up test of the motor in the headwind state, and the reliability of the control program can be verified in the research and development stage of the fan controller.

Description

Technical Field

[0001] The present invention relates to the field of fan motors, and more particularly to an automated test device for starting a fan motor. Technical Background

[0002] In the current field of fan motor technology, high-power fan motors installed outdoors, such as air conditioner outdoor units and exhaust fans, usually adopt sensorless vector control. When powered on, after calculating the fan current detected by the control chip, the position of the fan rotor can be determined before normal startup and operation.

[0003] Air conditioner outdoor units and exhaust fans installed outdoors are often affected by external winds. Even when the motor is in a stopped state, the fan blades will still rotate. If power is applied to start the motor while the fan blades are rotating, it will increase the interference factors in rotor position calculation and may lead to startup failure.

[0004] To avoid fan startup failure, during the research and development of fan controllers, it is necessary to test the startup reliability of the fan when the fan blades are rotating, including starting when the fan blades rotate with the wind and starting when the fan blades rotate against the wind (the normal operation direction of the fan is with the wind, and the opposite is against the wind).

[0005] In the existing test technologies, for the with-the-wind test, it only needs to power on and start again when the fan blades are in an inertial state after power-off; for the against-the-wind test, external force is needed to reverse the fan blades. If the fan blades are too large, it is difficult for external force to reverse them, and it is even more difficult to achieve automatic testing. Moreover, to obtain reverse rotation of the fan blades, without power, the fan blades are manually toggled to obtain the reverse rotation effect, and then to obtain the forward rotation effect, power is applied. The circuit diagram in this case is as Figure 4 shown. However, it can only be done by 1. manually toggling to reverse the fan blades; 2. supplying power to the motor to rotate the fan blades forward; 3. powering off the motor to prepare for manual toggling; and so on in a repeated and cumbersome process. Therefore, a technical solution that can provide automatic forward and reverse rotation is needed.

[0006] A method is now proposed that can make the fan motor rotate automatically against the wind and then perform a startup test, which can verify whether startup failure will occur when the fan starts in the reverse rotation state. Summary of the Invention

[0007] The technical solution disclosed by the present invention provides an automated test method for the startup of a fan motor, which solves the problem that the process required for the test reverse of the startup of the fan motor in the prior art is repetitive and cumbersome, and is not convenient for engineering tests. The present invention also discloses an automated test device for the startup of a fan motor, which is characterized in that: the automated test device changes the output line sequence connected to the motor of the controller under test or the reverse controller through an automatic switching device, and uses the fact that the output line sequence of the reverse controller is opposite to the output line sequence of the controller under test to control the reverse rotation of the motor, thereby starting the controller under test and verifying the startup of the motor in the reverse state.

[0008] According to a first aspect of the present invention, there is provided an automated test device for the startup of a fan motor, wherein:

[0009] The automated test device includes an input power supply, a controller under test, a reverse controller, an automatic switching device, and a motor;

[0010] The input power supply supplies power to the controller under test, the reverse controller, and the automatic switching device;

[0011] The controller under test is connected to the automatic switching device through a first set of three-phase lines;

[0012] The reverse controller is connected to the automatic switching device through a second set of three-phase lines;

[0013] The input end of the automatic switching device is connected to the output ends of the first set of three-phase lines and the second set of three-phase lines, and the output end of the automatic switching device is connected to the fan motor through a third set of three-phase lines;

[0014] The output line sequence of the first set of three-phase lines is opposite to the output line sequence of the second set of three-phase lines;

[0015] The automatic switching device is used to automatically switch the connection between the controller under test, the reverse controller, and the fan motor;

[0016] The controller under test is the test object and starts after the fan motor rotates in reverse.

[0017] Optionally, the automatic switching device is a six-channel relay with a timing function, three channels are normally closed groups, and three channels are normally open groups. The relay is controlled to switch between the normally open group and the normally closed group to realize the switching connection between the third set of three-phase lines at the motor end and the first set of three-phase lines of the controller under test and the second set of three-phase lines of the reverse controller, thereby realizing the forward rotation or reverse rotation of the fan motor.

[0018] According to a second aspect of the present invention, there is provided a test method for an automated test device for implementing the startup of a fan motor according to any one of the first aspect, which is characterized in that it includes:

[0019] Control the forward and reverse rotation of the fan motor through an automated testing device;

[0020] Test the controller under test based on the forward and reverse rotation of the fan motor.

[0021] Optionally, the controlling the forward and reverse rotation of the fan motor through an automated testing device includes:

[0022] Control the power supply to the automatic switching device, so that the reverse controller is connected to the fan motor and the controller under test is disconnected from the fan motor, so that the fan motor rotates in the reverse direction;

[0023] After the fan motor rotates in the reverse direction for a first preset time, switch the switch state of the automatic switching device, connect the controller under test, and disconnect the reverse controller at the same time.

[0024] Optionally, the testing the controller under test based on the forward and reverse rotation of the fan motor includes:

[0025] Start the fan motor for testing in the headwind state, control the automatic switching device to switch the switch state, disconnect the controller under test, and connect the reverse controller at the same time.

[0026] Optionally, it includes:

[0027] After the relay is powered on, the switch state is switched within a preset switching time threshold, the normally closed group of the automatic switching device is closed, and the normally open group is disconnected, then the third set of three-phase lines at the fan motor end is connected to the first set of three-phase lines of the controller under test, and the fan motor rotates forward;

[0028] The normally closed group of the automatic switching device is disconnected, and the normally open group is closed, then the third set of three-phase lines at the fan motor end is connected to the second set of three-phase lines of the reverse controller, and the fan motor rotates in the reverse direction.

[0029] Optionally, an automated testing device for starting a fan motor according to the first aspect includes one or more processors and a non-transitory computer-readable storage medium storing program instructions. When the one or more processors execute the program instructions, the one or more processors are used to implement the method according to any one of the second aspects.

[0030] According to a third aspect of the present invention, there is provided a non-transitory computer-readable storage medium having program instructions stored thereon. When the program instructions are executed by one or more processors, the one or more processors are used to implement the method according to any one of the second aspects.

[0031] Through the automated testing device, method and non-temporary computer-readable storage medium for starting a fan motor provided by the present invention, automatic switching between the motor and the output terminals of the controller under test and the reversing controller is realized, so that the motor automatically switches direction to achieve a starting test of the motor under headwind conditions, and the reliability of the control program can be verified during the development stage of the fan controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and other objects, features and advantages of the present invention will become more apparent by describing in detail its exemplary embodiments with reference to the accompanying drawings. The accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0033] Figure 1 It is a circuit structure diagram of an embodiment of an automatic test device for starting a fan motor according to the present invention;

[0034] Figure 2 It is a structural diagram of a controller driving a motor in an embodiment of an automated test device for starting a fan motor according to the present invention;

[0035] Figure 3 It is a flow chart of an embodiment of a test method of an automated test device for starting a fan motor according to the present invention;

[0036] Figure 4 It is a circuit structure diagram used in the prior art for testing the start-up of a fan motor. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] The terms used in the embodiments of the present invention are only for the purpose of describing specific embodiments, and are not intended to limit the present invention. The singular forms "a", "said" and "the" used in the embodiments of the present invention and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings, and "multiple" generally includes at least two, but does not exclude the inclusion of at least one.

[0039] It should be understood that the term "and / or" used herein is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally represents an "or" relationship between the preceding and following associated objects.

[0040] It should also be noted that the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, such that a commodity or system comprising a series of elements not only includes those elements but also includes other elements not explicitly listed, or further includes elements inherent to such commodity or system. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the commodity or system comprising the said element.

[0041] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, detailed descriptions of related known functions or configurations are omitted to avoid unnecessarily obscuring the technical points of the present invention. Additionally, throughout the description, the same reference numerals always refer to the same circuits, modules or units, and for the sake of brevity, repeated descriptions of the same circuits, modules or units are omitted.

[0042] Furthermore, it should be understood that one or more of the following methods or aspects thereof can be executed by at least one control system, control unit or controller. The terms "control unit", "controller", "control module" or "master control module" can refer to a hardware device including a memory and a processor, and the term "air conditioner" can refer to a refrigeration device similar thereto. The memory or computer-readable storage medium is configured to store program instructions, and the processor is specifically configured to execute the program instructions to execute one or more processes to be further described below. Moreover, it should be understood that, as will be appreciated by those of ordinary skill in the art, the appearance color of the present invention is merely for illustration and does not constitute a patent limitation, and the following methods and approaches can be executed by including a processor in combination with one or more other components.

[0043] Example 1

[0044] According to one or more embodiments of the present invention, embodiments of the present invention provide an automated test device for starting a fan motor, as Figure 1 shown, and the functions of this automated test device are described as follows:

[0045] This automated test device includes an input power supply, a controller under test, a reverse controller, an automatic switching device, and a motor;

[0046] The input power supply supplies power to the controller under test, the reverse controller, and the automatic switching device;

[0047] The tested controller is connected to the automatic switching device through the first set of three-phase lines;

[0048] The reverse controller is connected to the automatic switching device through the second set of three-phase lines;

[0049] The input end of the automatic switching device is connected to the output ends of the first set of three-phase lines and the second set of three-phase lines, and the output end of the automatic switching device is connected to the fan motor through the third set of three-phase lines;

[0050] The output line sequence of the first set of three-phase lines is opposite to the output line sequence of the second set of three-phase lines;

[0051] The automatic switching device is used to automatically switch the connection between the tested controller, the reverse controller and the fan motor;

[0052] The tested controller is the test object and starts after the fan motor reverses.

[0053] The automatic switching device is a six-channel relay with a timing function. Three channels are normally closed groups, and three channels are normally open groups. After the relay is powered on, the switch state is immediately switched, and it is responsible for switching the connection between the third set of three-phase lines at the motor end and the first set of three-phase lines of the tested controller or the second set of three-phase lines of the reverse controller respectively, so that the fan motor has two states of forward rotation and reverse rotation. The three-phase electricity output by the tested controller is respectively connected to the automatic switching device as U, V, and W, and the three-phase electricity output by the reverse controller is respectively connected to the automatic switching device as W, V, and U. Since the output line sequences of the tested controller and the reverse controller are opposite, when the two are respectively connected to the motor, the rotation direction of the fan motor will also be opposite, that is, when the reverse controller is connected, the wind blade rotates in reverse. Preferably, the automatic switching device is a six-channel relay with a timing function. The K1, K2, and K3 channels are normally closed groups, and the K4, K5, and K6 channels are normally open groups. After the relay is powered on, the switch state is immediately switched, and it is responsible for switching the connection between the third set of three-phase lines at the motor end and the first set or second set of three-phase lines of the two controllers respectively, so that the fan motor has two states of forward rotation and reverse rotation. As Figure 2 The normal connection method between the controller and the fan motor shown is that the principle it uses is simply that the controller outputs three-phase current of UVW to drive the motor to rotate. If the UVW line sequence is changed to WVU, the rotation direction of the fan motor will reverse.

[0054] Example 2

[0055] According to one or more embodiments of the present invention, embodiments of the present invention provide a test method for an automatic test device for starting a fan motor. As Figure 3 shown, this test method includes the following two steps S1 and S2:

[0056] S1, control the forward and reverse rotation of the fan motor through an automated test device.

[0057] S2, test the controller under test based on the forward and reverse rotation of the fan motor.

[0058] Among them,

[0059] Step S1, control the forward and reverse rotation of the fan motor through an automated test device.

[0060] The automated test device described in Embodiment 1 includes an input power supply, a controller under test, a reverse rotation controller, an automatic switching device, and a motor. The automatic switching device is a relay that controls whether the third set of three-phase lines at the motor end is connected to the second set of three-phase lines output by the controller under test or the second set of three-phase lines output by the reverse rotation controller.

[0061] The control power supply supplies power to the automatic switching device, enabling the reverse rotation controller to be connected to the fan motor and disconnecting the controller under test from the fan motor, so that the fan motor rotates in the reverse direction. That is, by default, the normally closed group of switches in the relay is closed and the normally open group of switches is open. Only the controller under test is connected to the fan motor to complete the forward rotation. Since the relay can accept the current of the two sets of three-phase lines output by the controller under test and the reverse rotation controller as inputs, after the relay is powered on, the states of the normally open and normally closed groups of switches are switched within a preset switching time threshold. Preferably, the preset switching time threshold is 1 second. When the normally closed group of the automatic switching device is closed and the normally open group is open, the third set of three-phase lines at the motor end is connected to the first set of three-phase lines of the controller under test, and the fan motor rotates forward; when the normally closed group of the automatic switching device is open and the normally open group is closed, the third set of three-phase lines at the motor end is connected to the second set of three-phase lines of the reverse rotation controller, and the fan motor rotates in the reverse direction.

[0062] Thus, the reversal of the input line sequence of the current input to the fan motor is completed. That is, when the relay is powered on, the normally open group of switches is closed and the normally closed group of switches is opened, and the fan motor is connected to the reverse rotation controller. At this time, the motor starts to rotate in the reverse direction.

[0063] When the fan motor rotates in the reverse direction and the automatic switching device runs for the first preset time, the switch state is switched to conduct the controller under test and disconnect the reverse rotation controller at the same time. Preferably, the first preset time is 10 seconds. That is, the fan motor is connected to the reverse rotation controller through the switch group of the relay, and the relay starts timing. When the timing exceeds 10 seconds, the normally open group of switches is disconnected to disconnect the reverse rotation controller; the normally closed group of switches is closed to conduct the controller under test, that is, the controller under test is connected to the fan motor, thereby controlling the fan motor to start rotating forward.

[0064] Step S2, test the controller under test based on the forward and reverse rotation of the fan motor.

[0065] Start the fan motor for the test in the headwind state, control the automatic switching device to switch the switch state, disconnect the controller under test, and at the same time conduct the reverse controller. After the relay is powered on, the switch state is switched within the preset switching time threshold. The normally closed group of the automatic switching device closes, and the normally open group disconnects. Then, the third group of three-phase lines at the fan motor end is connected to the first group of three-phase lines of the controller under test, and the fan motor rotates forward. Preferably, the preset switching time threshold is 1 second. When the time exceeds the preset switching time threshold, the normally closed group of the automatic switching device disconnects, and the normally open group closes. The third group of three-phase lines at the fan motor end is connected to the second group of three-phase lines of the reverse controller, and the fan motor rotates reversely. That is, when the motor rotates reversely, start the test of the motor in the headwind state, and the relay starts timing. When the timing exceeds 1 second, switch the normally open group and the normally closed group of the relay switch to the open and closed states respectively, disconnect the normally closed group to disconnect the controller under test, and connect the normally open group to conduct the reverse controller to make the motor rotate reversely. Repeat this process to obtain the forward rotation state and the reverse rotation state of the motor, and test the controller under test in the two states respectively.

[0066] Example 3

[0067] According to one or more embodiments of the present invention, an embodiment of the present invention provides a non-transitory computer-readable storage medium, on which program instructions for a test method of an automatic test device for starting a fan motor are stored. When the program instructions are executed by one or more processors, the one or more processors are used to implement the automatic test method according to any one of Embodiment 2.

[0068] Through the automatic test device, method and non-transitory computer-readable storage medium for starting a fan motor provided by the embodiments of the present invention, automatic switching between the motor and the output ends of the controller under test and the reverse controller is realized, and the motor automatically switches its rotation direction to achieve the start test of the motor in the headwind state, which can verify the reliability of the control program at the R & D stage of the fan controller.

[0069] In summary, it is easy for those skilled in the art to understand that, on the premise of no conflict, the above advantageous ways can be freely combined and superimposed. The above description is only for the embodiments of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the scope of the claims of the present invention.

Claims

1. An automated test device for the startup of a fan motor, characterized in that: The automated test device includes an input power supply, a controller under test, a reverse controller, an automatic switching device, and a fan motor; The input power supply supplies power to the controller under test, the reverse controller, and the automatic switching device; The controller under test is connected to the automatic switching device through a first set of three-phase lines; The reverse controller is connected to the automatic switching device through a second set of three-phase lines; The input end of the automatic switching device is connected to the output ends of the first set of three-phase lines and the second set of three-phase lines, and the output end of the automatic switching device is connected to the fan motor through a third set of three-phase lines; The output line sequence of the first set of three-phase lines is opposite to the output line sequence of the second set of three-phase lines; The automatic switching device is used to automatically switch the connection between the controller under test, the reverse controller, and the fan motor; The controller under test is the test object and is started after the fan motor rotates in reverse.

2. The automated test device for the startup of a fan motor according to claim 1, characterized in that, The automatic switching device is a six-channel relay with a timing function. Three channels are normally closed groups, and three channels are normally open groups. The relay is controlled to switch the normally open group and the normally closed group to achieve the switching connection between the third set of three-phase lines at the fan motor end and the first set of three-phase lines of the controller under test and the second set of three-phase lines of the reverse controller, thereby realizing the forward rotation or reverse rotation of the fan motor.

3. A test method for implementing the automated test device for the startup of the fan motor according to claim 2, characterized in that, It includes: Controlling the forward rotation and reverse rotation of the fan motor through the automated test device; Testing the controller under test based on the forward rotation and reverse rotation of the fan motor.

4. The method according to claim 3, characterized in that, The controlling the forward rotation and reverse rotation of the fan motor through the automated test device includes: Controlling the power supply to supply power to the automatic switching device, making the reverse controller conduct with the fan motor and the controller under test disconnect from the fan motor, so that the fan motor rotates in reverse; After the fan motor rotates in reverse for a first preset time, switch the switch state of the automatic switching device, conduct the controller under test, and disconnect the reverse controller at the same time.

5. The method according to claim 3, characterized in that, The testing the controller under test based on the forward rotation and reverse rotation of the fan motor includes: Starting the fan motor for testing in the headwind state, controlling the automatic switching device to switch the switch state, disconnecting the controller under test, and conducting the reverse controller at the same time.

6. The method according to claim 4 or 5, comprising: After the relay is powered on, the switch state is switched within a preset switching time threshold. When the normally closed group of the automatic switching device is closed and the normally open group is disconnected, the third set of three-phase lines at the fan motor end is connected to the first set of three-phase lines of the controller under test, and the fan motor rotates forward; When the normally closed group of the automatic switching device is disconnected and the normally open group is closed, the third set of three-phase lines at the fan motor end is connected to the second set of three-phase lines of the reverse controller, and the fan motor rotates in reverse.

7. A non-transitory computer-readable storage medium, on which program instructions are stored, and when the program instructions are executed by one or more processors, the one or more processors are used to implement the method according to any one of claims 3-6.

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