Motor control method and device, electronic equipment and storage medium
By acquiring and storing the motor overcurrent signal and operating switch status, resetting the overcurrent latch circuit and generating fault information, the problem of the inability to diagnose and locate the motor overcurrent fault in the prior art is solved, and the accurate identification and prevention of faults is achieved , improves the stability of the power system.
Patent Information
- Application Number
- CN202411386126.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-30
- Publication Date
- 2024-12-31
AI Technical Summary
The prior art cannot achieve accurate diagnosis and positioning of motor overcurrent faults, resulting in the inability to effectively prevent winding burning and insulation damage, affecting the stability of the power system.
By obtaining the output level of the overcurrent latch circuit, storing the overcurrent signal and the operating switch status of the power module, resetting the overcurrent latch circuit, and generating fault information during the low-level output for three consecutive cycles, realizing the fault Diagnosis and positioning.
Accurately realize fault diagnosis and positioning, prevent serious consequences caused by motor overcurrent, and improve the stability of the power system.
Smart Images
Figure CN119232033A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of motor control, and in particular to a motor control method, device, electronic equipment and storage medium. Background Art
[0002] Motor overcurrent refers to the current exceeding the rated current during the operation of the motor. This current state exceeding the rated value will not only cause the internal temperature of the motor to rise, but may also cause serious consequences such as winding burnout and insulation damage. In addition, overcurrent may also cause an impact on the power system and affect the stability of the entire power system.
[0003] The existing technology generally uses intermittent switching to achieve overcurrent protection. By sampling the three-phase current, when the sampled current exceeds the specified threshold, the overcurrent protection circuit outputs an overcurrent indication signal, and then automatically blocks the wave and stops running, making it impossible to diagnose and locate the fault. Summary of the invention
[0004] In order to solve the above problems, a motor control method, device, electronic device and storage medium are provided.
[0005] In a first aspect, an embodiment of the present invention provides a motor control method, comprising: Obtain the output level of the overcurrent latch circuit; When an overcurrent signal from an overcurrent detection circuit is received, an overcurrent latch circuit is used to store the overcurrent signal and the operating switch state of the power module; After all switches of the power modules are disconnected, the operating switch state of the power modules is restored according to the operating switch state, and the overcurrent latch circuit is reset; If the output level of the overcurrent latch circuit is low for three consecutive cycles, all switches of the power module are disconnected, and fault information is generated and reported.
[0006] In a second aspect, an embodiment of the present invention provides a motor control device, comprising: An information acquisition module, used for acquiring the output level of the overcurrent latch circuit; A latch module, configured to store the overcurrent signal and the operating switch state of the power module by using the overcurrent latch circuit when receiving the overcurrent signal from the overcurrent detection circuit; A reset module, used to restore the operating switch state of the power module and reset the overcurrent latch circuit according to the operating switch state after all switches of the power module are disconnected; The diagnostic module is used to generate and report fault information after all switches of the power module are disconnected if the output level of the overcurrent latch circuit is low for three consecutive cycles.
[0007] The beneficial effects of the above technical solution provided by the present invention include at least: By acquiring the output level of the overcurrent latch circuit; when receiving the overcurrent signal of the overcurrent detection circuit, using the overcurrent latch circuit to store the overcurrent signal and the operating switch state of the power module; after all the switches of the power module are disconnected, the operating switch state of the power module is restored according to the operating switch state, and the overcurrent latch circuit is reset; if the output level of the overcurrent latch circuit is a low level for three consecutive cycles, after all the switches of the power module are disconnected, fault information is generated and reported, so that accurate fault diagnosis and location elimination can be achieved.
[0008] Other features and advantages of the present invention will be described in the following description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.
[0009] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 is a flow chart of a method in an embodiment of the present invention; Figure 2 Schematic diagram of the principle of an overcurrent detection circuit in an embodiment of the present invention; Figure 3 The figure is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION
[0011] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.
[0012] In order to solve the problems existing in the prior art, embodiments of the present invention provide a motor control method, device, electronic device and storage medium.
[0013] The embodiment of the present invention provides a motor control method, the process of which is as follows: Figure 1 As shown, the following steps are included: Step S1: Obtain the output level of the overcurrent latch circuit Step S2: When an overcurrent signal from the overcurrent detection circuit is received, the overcurrent latch circuit is used to store the overcurrent signal and the operating switch state of the power module.
[0014] Step S3: After all switches of the power modules are turned off, the operating switch state of the power modules is restored according to the operating switch state, and the overcurrent latch circuit is reset.
[0015] Step S4: If the output level of the overcurrent latch circuit is low for three consecutive cycles, all switches of the power module are turned off, and fault information is generated and reported. In the above method of this embodiment, the output level of the overcurrent latch circuit is obtained; when the overcurrent signal of the overcurrent detection circuit is received, the overcurrent latch circuit is used to store the overcurrent signal and the operating switch state of the power module; after all the switches of the power module are disconnected, the operating switch state of the power module is restored according to the operating switch state, and the overcurrent latch circuit is reset; if the output level of the overcurrent latch circuit is a low level for three consecutive cycles, after all the switches of the power module are disconnected, fault information is generated and reported, so that fault diagnosis and location elimination can be accurately achieved.
[0016] The above method of this embodiment further includes the following steps: After the operating switch state of the power module is restored, if the output level of the overcurrent latch circuit is a high level, it is determined that the overcurrent fault type corresponding to the overcurrent signal is an instantaneous overcurrent fault.
[0017] In the above method of this embodiment, Figure 2 As shown, the overcurrent detection circuit includes a current sampling sensor, a current sampling circuit, a voltage amplification module and a voltage comparator connected in sequence; The current sampling sensor is used to detect the three-phase current when the motor is running; The current sampling circuit is used to receive the three-phase current sent by the current sampling sensor, filter the three-phase current and send the sampling signal to the motor controller and the voltage comparator; The voltage comparator is used to determine whether the three-phase current is overcurrent based on the reference voltage output by the motor controller and the three-phase current, and generate an overcurrent signal.
[0018] In the above method of this embodiment, if the output level of the overcurrent latch circuit is low for three consecutive cycles, after all switches of the power module are disconnected, fault information is generated and reported, including the following steps: The number of low levels output by the overcurrent latch circuit in three consecutive cycles is accumulated. If the output level of the overcurrent latch circuit is low in three consecutive cycles, all switches of the power module are disconnected, and fault information is generated and reported.
[0019] Those skilled in the art can change the above sequence without departing from the protection scope of the present disclosure.
[0020] Another embodiment of the present invention provides a motor control device, comprising: An information acquisition module, used for acquiring the output level of the overcurrent latch circuit; A latch module, configured to store the overcurrent signal and the operating switch state of the power module by using the overcurrent latch circuit when receiving the overcurrent signal from the overcurrent detection circuit; A reset module, used to restore the operating switch state of the power module and reset the overcurrent latch circuit according to the operating switch state after all switches of the power module are disconnected; The diagnostic module is used to generate and report fault information after all switches of the power module are disconnected if the output level of the overcurrent latch circuit is low for three consecutive cycles.
[0021] Regarding the system in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.
[0022] In this embodiment, it also includes: The analysis module is used to determine that the overcurrent fault type corresponding to the overcurrent signal is an instantaneous overcurrent fault if the output level of the overcurrent latch circuit is a high level after the operating switch state of the power module is restored.
[0023] The diagnostic module is specifically used for: The number of low levels output by the overcurrent latch circuit in three consecutive cycles is accumulated. If the output level of the overcurrent latch circuit is low in three consecutive cycles, all switches of the power module are disconnected, and fault information is generated and reported.
[0024] Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, whose structure is as follows: Figure 3 As shown, it includes: a memory, a processor, and a computer program stored in the memory and running on the processor, and the processor implements the above-mentioned motor method when executing the computer program.
[0025] Based on the same inventive concept, an embodiment of the present invention further provides a computer storage medium, in which computer executable instructions are stored. When the computer executable instructions are executed by a processor, the aforementioned motor control method is implemented.
[0026] Any modifications, supplements and equivalent substitutions made within the scope of the principles of the present invention shall still fall within the patent scope of the present invention.
Claims
1. A motor control method, characterized in that: The following steps are involved: Obtain the output level of the overcurrent latch circuit; When an overcurrent signal from an overcurrent detection circuit is received, an overcurrent latch circuit is used to store the overcurrent signal and the operating switch state of the power module; After all switches of the power modules are disconnected, the operating switch state of the power modules is restored according to the operating switch state, and the overcurrent latch circuit is reset; If the output level of the overcurrent latch circuit is low for three consecutive cycles, all switches of the power module are disconnected, and fault information is generated and reported.
2. The method according to claim 1, characterized in that The following steps are also included: After the operating switch state of the power module is restored, if the output level of the overcurrent latch circuit is a high level, it is determined that the overcurrent fault type corresponding to the overcurrent signal is an instantaneous overcurrent fault.
3. The method according to claim 2, characterized in that The overcurrent detection circuit comprises a current sampling sensor, a current sampling circuit, a voltage amplification module and a voltage comparator which are connected in sequence; The current sampling sensor is used to detect the three-phase current when the motor is running; The current sampling circuit is used to receive the three-phase current sent by the current sampling sensor, filter the three-phase current and send the sampling signal to the motor controller and the voltage comparator; The voltage comparator is used to determine whether the three-phase current is overcurrent based on the reference voltage output by the motor controller and the three-phase current, and generate an overcurrent signal.
4. The method according to claim 3, characterized in that If the output level of the overcurrent latch circuit is low in three consecutive cycles, all switches of the power module are disconnected, and fault information is generated and reported, including the following steps: The number of low levels output by the overcurrent latch circuit in three consecutive cycles is accumulated. If the output level of the overcurrent latch circuit is low in three consecutive cycles, all switches of the power module are disconnected, and fault information is generated and reported.
5. A motor control device, characterized in that: include: An information acquisition module, used for acquiring the output level of the overcurrent latch circuit; A latch module, configured to store the overcurrent signal and the operating switch state of the power module by using the overcurrent latch circuit when receiving the overcurrent signal from the overcurrent detection circuit; A reset module, used to restore the operating switch state of the power module and reset the overcurrent latch circuit according to the operating switch state after all switches of the power module are disconnected; The diagnostic module is used to generate and report fault information after all switches of the power module are disconnected if the output level of the overcurrent latch circuit is low for three consecutive cycles.
6. The device according to claim 5, characterized in that Also includes: The analysis module is used to determine that the overcurrent fault type corresponding to the overcurrent signal is an instantaneous overcurrent fault if the output level of the overcurrent latch circuit is a high level after the operating switch state of the power module is restored.
7. The device according to claim 5, characterized in that The diagnostic module is specifically used for: The number of low levels output by the overcurrent latch circuit in three consecutive cycles is accumulated. If the output level of the overcurrent latch circuit is low in three consecutive cycles, all switches of the power module are disconnected, and fault information is generated and reported.
8. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and running on the processor, wherein the processor implements the motor control method according to any one of claims 1 to 4 when executing the computer program.
9. A computer storage medium, characterized in that The computer storage medium stores computer executable instructions, and the computer executable instructions, when executed, implement the motor control method described in any one of claims 1 to 4.