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CN-117780611-B - Compressor, diagnostic method and device thereof, readable storage medium and vehicle

CN117780611BCN 117780611 BCN117780611 BCN 117780611BCN-117780611-B

Abstract

The invention provides a compressor, a diagnosis method, a diagnosis device, a readable storage medium and a vehicle thereof, wherein the diagnosis method comprises the steps of obtaining an input variable of a compressor controller; the method comprises the steps of processing input variables to obtain target parameter values, wherein the target parameter values comprise at least one of a first target parameter value obtained by processing the input variables in a steady state time domain, a second target parameter value obtained by processing the input variables in a transient state time domain and a third target parameter value obtained by processing the input variables in a steady state frequency domain, and determining a diagnosis result of a compressor according to a comparison result of the target parameter values and corresponding parameter thresholds.

Inventors

  • YE BINYING
  • YANG KAICHENG
  • SONG WANJIE

Assignees

  • 安庆威灵汽车部件有限公司
  • 安徽威灵汽车部件有限公司
  • 广东威灵汽车部件有限公司

Dates

Publication Date
20260508
Application Date
20220922

Claims (15)

  1. 1. A method of diagnosing a compressor, wherein the compressor is associated with a compressor controller, the method comprising: acquiring an input variable of the compressor controller; processing the input variable to obtain a target parameter value, wherein the target parameter value comprises at least one of a first target parameter value obtained by processing the input variable in a steady state time domain, a second target parameter value obtained by processing the input variable in a transient state time domain and a third target parameter value obtained by processing the input variable in a steady state frequency domain; determining a diagnosis result of the compressor according to a comparison result of the target parameter value and a corresponding parameter threshold value; In the case that the target parameter value includes a first target parameter value, the determining a diagnosis result of the compressor according to a comparison result of the target parameter value and a corresponding parameter threshold value specifically includes: the compressor is abnormal in the case that the first target parameter value is greater than a first parameter threshold or the first target parameter value is less than a second parameter threshold; Wherein the first parameter threshold is greater than the second parameter threshold, the first target parameter value comprising a flux linkage magnitude or a magnitude of a counter potential; in the case that the target parameter value includes a second target parameter value, the determining a diagnosis result of the compressor according to a comparison result of the target parameter value and a corresponding parameter threshold value specifically includes: In the first duration, if the accumulated times of the second target parameter value being greater than the corresponding parameter threshold value is greater than the preset times, the compressor is abnormal; wherein the second target parameter value comprises a current difference value or a rotation speed difference value; in the case that the target parameter value includes a third target parameter value, the determining a diagnosis result of the compressor according to a comparison result of the target parameter value and a corresponding parameter threshold value specifically includes: In the case that the phase difference is greater than a third parameter threshold or the phase difference is less than a fourth parameter threshold, the compressor is abnormal; the third parameter threshold is greater than the fourth parameter threshold, the phase difference is obtained by performing the following processing on a given rotation speed value and an actual rotation speed value of the compressor, and the third target parameter value is the phase difference: Determining a fluctuation component of the rotational speed according to the given rotational speed value and the actual rotational speed value; A phase difference of the current on the q-axis of the compressor and the ripple component is determined at two-phase rotation coordinates.
  2. 2. The method of diagnosing a compressor according to claim 1, wherein, in the case where the first target parameter value includes a flux linkage magnitude, the input variable includes a flux linkage at which a rotational speed of the compressor is in a stationary phase in a two-phase stationary coordinate system.
  3. 3. The method for diagnosing a compressor as recited in claim 1, wherein, in the case where the first target parameter value includes a magnitude of a back electromotive force, the input variable includes a back electromotive force at which a rotational speed of the compressor is in a steady phase at two-phase rotational coordinates.
  4. 4. A method of diagnosing a compressor as recited in claim 2 or 3, further comprising: In the case of abnormality of the compressor, an abnormality cause including decay of magnetic properties of the permanent magnet is output.
  5. 5. The method of diagnosing a compressor according to claim 1, wherein in a case where the second target parameter value includes the current difference value, the current difference value is an output value of a dq current controller when a given current value and an actual current value of the compressor are input to the dq current controller.
  6. 6. The method of diagnosing a compressor according to claim 1, wherein in the case where the second target parameter value includes the rotational speed difference value, the rotational speed difference value is an output value of a rotational speed controller when a given rotational speed value and an actual rotational speed value of the compressor are input to the rotational speed controller.
  7. 7. The method for diagnosing a compressor according to claim 5 or 6, further comprising: in the case of an abnormality of the compressor, an abnormality cause including the existence decay of a mechanism part of the compressor is output.
  8. 8. A method for diagnosing a compressor as recited in claim 1, wherein, In the case that the target parameter value includes a third target parameter value, the determining a diagnosis result of the compressor according to a comparison result of the target parameter value and a corresponding parameter threshold value specifically includes: in the event that the normalized fluctuation component is greater than a corresponding parameter threshold, the compressor is abnormal; Wherein the normalized fluctuation component is obtained by performing the following processing on a given rotational speed value and an actual rotational speed value of the compressor: Determining a fluctuation component of the rotational speed according to the given rotational speed value and the actual rotational speed value; determining a component of the fluctuating component of the rotational speed at a mechanical rotational speed; And carrying out normalization processing on the ratio of the component of the fluctuation component of the rotating speed on the mechanical rotating speed to the current amplitude of the compressor to obtain the normalized fluctuation component.
  9. 9. The method for diagnosing a compressor according to claim 1 or 8, further comprising: In the case of an abnormality of the compressor, an abnormality cause including the presence of non-uniformity damage to a mechanism component of the compressor is output.
  10. 10. A diagnostic device for a compressor, for implementing a diagnostic method of a compressor according to any one of claims 1 to 9, said compressor being associated with a compressor controller, said diagnostic device comprising: An acquisition unit for acquiring an input variable of the compressor controller; the processing unit is used for processing the input variable to obtain a target parameter value, wherein the target parameter value comprises at least one of a first target parameter value obtained by processing the input variable in a steady-state time domain, a second target parameter value obtained by processing the input variable in a transient time domain and a third target parameter value obtained by processing the input variable in a steady-state frequency domain; and the diagnosis unit is used for determining the diagnosis result of the compressor according to the comparison result of the target parameter value and the corresponding parameter threshold value.
  11. 11. A diagnostic device for a compressor, comprising: a controller and a memory, wherein the memory has stored therein a program or instructions which, when executed in the memory, implement the steps of the diagnostic method as claimed in any one of claims 1 to 9.
  12. 12. A readable storage medium, characterized in that it has stored thereon a program or instructions which, when executed by a processor, implement the steps of the diagnostic method according to any of claims 1 to 9.
  13. 13. A kind of compressor, in which the compressor is composed of a casing, characterized by comprising the following steps: a diagnostic device for a compressor according to claim 10 or 11, and/or The readable storage medium of claim 12.
  14. 14. A vehicle, characterized by comprising: The compressor of claim 13.
  15. 15. The vehicle of claim 14, characterized in that the vehicle further comprises: And an output device connected to the compressor, the output device outputting a cause of the abnormality based on the presence of the abnormality in the compressor.

Description

Compressor, diagnostic method and device thereof, readable storage medium and vehicle Technical Field The present invention relates to the field of control technology, and in particular, to a compressor, a diagnostic method and apparatus thereof, a readable storage medium, and a vehicle. Background The compressor is a product of combination of a mechanical part, a motor and an electric control. During operation, faults such as abrasion of a compressor pump body, tooth breakage, oil shortage, abrasion of a bearing, insulation failure of a motor, damage of an electric control device, deterioration of heat conducting performance and the like can occur. In the related technical scheme, the diagnosis of the compressor is divided into two main types, namely, by installing vibration, acceleration and noise sensors, by carrying out spectrum analysis on signals of the sensors and comparing the signals with standard spectrum, and the other type is divided into two main types, namely, by carrying out spectrum analysis on collected current signals. In the above technical solutions, spectrum analysis needs to be performed on the acquired data, and the spectrum analysis needs a large amount of computation and has a high requirement on hardware. Disclosure of Invention The present invention aims to solve at least one of the technical problems existing in the prior art or related art. To this end, a first aspect of the present invention is to provide a diagnostic method of a compressor. A second aspect of the present invention is to provide a diagnostic device of a compressor. A third aspect of the present invention is to provide a diagnostic device of another compressor. A fourth aspect of the present invention is to provide a readable storage medium. A fifth aspect of the present invention is to provide a compressor. A sixth aspect of the invention is to provide a vehicle. In view of this, according to a first aspect of the present invention, there is provided a diagnostic method for a compressor, the compressor being associated with a compressor controller, the diagnostic method comprising obtaining an input variable of the compressor controller, processing the input variable to obtain a target parameter value, the target parameter value comprising at least one of a first target parameter value obtained by processing the input variable in a steady state time domain, a second target parameter value obtained by processing the input variable in a transient state time domain, a third target parameter value obtained by processing the input variable in a steady state frequency domain, and determining a diagnostic result of the compressor based on a comparison of the target parameter value and a corresponding parameter threshold. The technical proposal of the application provides a diagnosis method of a compressor, by operating the diagnosis method, the fault detection of the compressor can be realized, in the diagnosis method, the input variables input to the compressor controller are analyzed, processed and judged to realize the fault diagnosis of the compressor, and in the process, the frequency spectrum analysis is not needed, so that the calculation amount needed by the diagnosis is smaller, and the requirement of the fault diagnosis of the compressor on hardware is further reduced. In addition, the diagnosis method of the compressor provided by the application has the following additional technical characteristics. In the technical scheme, when the target parameter value comprises a first target parameter value, the diagnosis result of the compressor is determined according to the comparison result of the target parameter value and the corresponding parameter threshold value, and the method specifically comprises the step of abnormal compressor when the first target parameter value is larger than the first parameter threshold value or smaller than the second parameter threshold value, wherein the first parameter threshold value is larger than the second parameter threshold value, and the first target parameter value comprises the flux linkage amplitude or the counter potential amplitude. In one embodiment, where the first target parameter value comprises a flux linkage magnitude, the input variable comprises a flux linkage at which the rotational speed of the compressor is in a steady phase in a two-phase stationary coordinate system. In the technical scheme, if the compressor does not have a fault in a rotating speed steady state, the flux linkage amplitude of the compressor is positioned between the first parameter threshold and the second parameter threshold, namely, is stabilized between the first parameter threshold and the second parameter threshold, and under the condition that the compressor has a fault, the flux linkage amplitude of the compressor is slowly increased or slowly reduced, based on the fact, the flux linkage amplitude in the rotating speed steady state can be compared with the corresponding first pa