CN-122001267-A - Control method of compressor and electrical equipment

CN122001267ACN 122001267 ACN122001267 ACN 122001267ACN-122001267-A

Abstract

The application provides a control method of a compressor and electrical equipment, and belongs to the technical field of compressor control. According to the method, a first compensation current required by suppressing rotation speed fluctuation is calculated by using a torque compensation algorithm, a second compensation current required by suppressing current fluctuation is calculated by using a torque harmonic suppression algorithm, and then corresponding filtering processing is carried out on the first compensation current and the second compensation current according to the real-time rotation speed of the compressor, so that a real compensation current curve is obtained to control the operation of the compressor, seamless smooth switching between the torque compensation algorithm and the torque harmonic suppression algorithm can be realized, and the reliability during switching is improved.

Inventors

XIE CHENCHEN
ZHAO FEI
WANG ZHIWEI
ZHAO DAN
ZHANG TIANFU
ZHANG XU

Assignees

海信家电集团股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241031

Claims (10)

1. A control method of a compressor, comprising: collecting real-time rotating speed of the compressor, and calculating a first compensation current required for restraining rotating speed fluctuation according to the real-time rotating speed and the rotating speed fluctuation; collecting real-time current of the operation of the compressor, and calculating a second compensation current required for suppressing current fluctuation according to the real-time current and the current harmonic fluctuation; According to the real-time rotating speed of the compressor, performing first filtering treatment on the first compensation current, performing second filtering treatment on the second compensation current, and adding and processing the filtering treatment results to obtain a compensation current curve, wherein the compensation current curve is a curve of the change of the compensation current along with time; the compensation current profile is injected into a motor loop to control the compressor operation.
2. The method of claim 1, wherein said performing a first filtering process on said first compensation current and a second filtering process on said second compensation current according to a real-time rotational speed of said compressor, and adding and processing the results of the filtering processes to obtain a compensation current curve, comprises: when the real-time rotating speed of the compressor is smaller than the set rotating speed, performing first filtering treatment on the first compensation current by using a first low-pass filter to obtain a first filtering result, wherein a first proportion value of the first low-pass filter is gradually increased from 0 to 1; performing second filtering processing on the second compensation current by using a second low-pass filter to obtain a second filtering result, wherein a second proportion value of the second low-pass filter is gradually reduced from 1 to 0; and adding and processing the first filtering result and the second filtering result to obtain a compensation current curve.
3. The method of claim 2, wherein said performing a first filtering process on said first compensation current and a second filtering process on said second compensation current according to a real-time rotational speed of said compressor, and adding and processing the results of the filtering processes to obtain a compensation current curve, comprises: When the real-time rotating speed of the compressor is smaller than the set rotating speed, multiplying the first compensating current by the first proportion value of the first low-pass filter, multiplying the second compensating current by the second proportion value of the second low-pass filter, and adding and processing the multiplied results to obtain a compensating current curve, wherein the first proportion value of the first low-pass filter is gradually increased from 0 to 1, and the second proportion value of the second low-pass filter is gradually decreased from 1 to 0.
4. The method according to claim 1 or 2, wherein said performing a first filtering process on said first compensation current and a second filtering process on said second compensation current according to a real-time rotational speed of said compressor, and adding and processing the results of the filtering processes to obtain a compensation current curve, comprises: When the real-time rotating speed of the compressor is larger than or equal to the set rotating speed, performing first filtering treatment on the first compensation current by using a first low-pass filter to obtain a first filtering result, wherein a first proportion value of the first low-pass filter is gradually reduced from 1 to 0; Performing second filtering processing on the second compensation current by using a second low-pass filter to obtain a second filtering result, wherein a second proportion value of the second low-pass filter is gradually increased from 0 to 1; and adding and processing the first filtering result and the second filtering result to obtain a compensation current curve.
5. The method of claim 4, wherein said performing a first filtering process on said first compensation current and a second filtering process on said second compensation current according to a real-time rotational speed of said compressor and adding the results of the filtering processes to obtain a compensation current curve comprises: When the real-time rotating speed of the compressor is larger than or equal to the set rotating speed, multiplying the first compensating current by the first proportion value of the first low-pass filter, multiplying the second compensating current by the second proportion value of the second low-pass filter, and adding and processing the multiplied results to obtain a compensating current curve, wherein the first proportion value of the first low-pass filter gradually decreases from 1 to 0, and the second proportion value of the second low-pass filter gradually increases from 0 to 1.
6. The method of claim 1, wherein the first compensation current comprises a first q-axis compensation current and a first d-axis compensation current, and wherein the second compensation current comprises a second q-axis compensation current and a second d-axis compensation current, and wherein the compensation current profile comprises a q-axis compensation current profile and a d-axis compensation current profile, respectively.
7. The method of claim 6, wherein performing a first filtering process on the first compensation current and performing a second filtering process on the second compensation current according to a real-time rotation speed of the compressor, and adding and processing the results of the filtering processes to obtain a compensation current curve, comprising: When the real-time rotating speed of the compressor is smaller than the set rotating speed, multiplying a first proportional value of a first low-pass filter by the first q-axis compensation current to obtain a first q-axis filtering result, and multiplying the first proportional value of the first low-pass filter by the first d-axis compensation current to obtain a first d-axis filtering result, wherein the first proportional value of the first low-pass filter gradually increases from 0 to 1; Multiplying the second q-axis compensation current by a second proportional value of a second low-pass filter to obtain a second q-axis filtering result, and multiplying the second q-axis compensation current by the second proportional value of the second low-pass filter to obtain a second d-axis filtering result, wherein the second proportional value of the second low-pass filter gradually decreases from 1 to 0; Adding and processing the first q-axis filtering result and the second q-axis filtering result to obtain a q-axis compensation current curve, and adding and processing the first d-axis filtering result and the second d-axis filtering result to obtain a d-axis compensation current curve; When the real-time rotating speed of the compressor is larger than or equal to the set rotating speed, multiplying the first q-axis compensation current by a first proportion value of the first low-pass filter to obtain a first q-axis filtering result, and multiplying the first d-axis compensation current by the first proportion value of the first low-pass filter to obtain a first d-axis filtering result, wherein the first proportion value of the first low-pass filter gradually decreases from 1 to 0; Multiplying the second q-axis compensation current by a second proportion value of the second low-pass filter to obtain a second q-axis filtering result, and multiplying the second proportion value of the second low-pass filter by the second d-axis compensation current to obtain a second d-axis filtering result, wherein the second proportion value of the second low-pass filter gradually increases from 0 to 1; And adding and processing the first q-axis filtering result and the second q-axis filtering result to obtain a q-axis compensation current curve, and adding and processing the first d-axis filtering result and the second d-axis filtering result to obtain a d-axis compensation current curve.
8. The method of claim 6, wherein calculating a first compensation current required to suppress rotational speed fluctuations based on the real-time rotational speed and rotational speed fluctuations comprises: and calculating a first q-axis compensation current and a first d-axis compensation current required for restraining the rotation speed fluctuation by utilizing a torque compensation algorithm according to the real-time rotation speed and the rotation speed fluctuation.
9. The method of claim 6, wherein calculating a second compensation current required to suppress current fluctuations from the real-time current and current harmonic fluctuation amounts comprises: and calculating a second q-axis compensation current and a second d-axis compensation current required for suppressing current fluctuation by using a torque harmonic suppression algorithm according to the real-time current and the current harmonic fluctuation quantity.
10. An electrical device, comprising: A compressor; a controller electrically connected to the controller for performing the method of any one of claims 1-9.

Description

Control method of compressor and electrical equipment Technical Field The application relates to the technical field of compressor control, in particular to a control method of a compressor and electrical equipment. Background Most of the compressors commonly used in the field of household appliances are of piston type or rotor type structures, and when the compressors perform compression and relaxation of mechanical cycles, due to eccentric mechanical structures of the internal structures, fluctuation of rotational speed and torque of the mechanical cycles can be generated during operation, and the regular fluctuation can cause adverse effects on the aspects of compressor vibration, noise, compressor loss and the like. In the existing compressor driving control, adverse effects caused by rotation speed fluctuation are restrained by starting a torque compensation algorithm in a low-frequency stage of the operation of the compressor. In the middle-high frequency stage of the operation of the compressor, the operation loss of the compressor is reduced through a torque harmonic suppression algorithm. However, the two algorithms have mutually exclusive effects, namely, the torque compensation algorithm increases torque fluctuation through compensating current to reduce the amplitude of rotation speed fluctuation, and the torque harmonic suppression algorithm reduces torque fluctuation through compensating current to cause the increase of rotation speed fluctuation. Therefore, the two control algorithms cannot be simultaneously in an on state, and the existing compressor control strategy is used for controlling the on and off of the two algorithms by simply utilizing the real-time rotating speed of the compressor, namely, when the rotating speed of the compressor is lower than a preset value, the torque compensation algorithm is started, the torque harmonic suppression algorithm is closed, and when the rotating speed of the compressor is higher than the preset value, the torque compensation algorithm is closed, and the torque harmonic suppression algorithm is started. Furthermore, in order to improve the reliability of the switching stage, the switching of the two algorithms is generally controlled by increasing the domain area, that is, when the rotation speed of the compressor is lower than a preset value, the torque compensation algorithm is controlled to be turned on, when the rotation speed of the compressor is higher than a preset value, the torque compensation algorithm is controlled to be turned off, when the rotation speed of the compressor is lower than a preset value, the torque harmonic suppression algorithm is controlled to be turned off, and when the rotation speed of the compressor is higher than a preset value, the torque harmonic suppression algorithm is controlled to be turned off, and generally, the preset value is smaller than the preset value, and a certain difference space is reserved. However, the domain area of the switching mode needs artificial try, whether the switching process is smooth or not is tested to judge the switching effect, besides the need of multiple try, the mode can cause the result of overlarge driving current fluctuation in the switching stage in a scene of relatively rapid change of the rotation speed of the compressor, and the reliability is not high. Disclosure of Invention The embodiment of the application mainly aims to provide a control method of a compressor and electrical equipment, aiming at respectively carrying out corresponding filtering treatment on a first compensation current and a second compensation current according to the real-time rotating speed of the compressor to obtain a real compensation current curve to control the operation of the compressor, realizing seamless smooth switching between a torque compensation algorithm and a torque harmonic suppression algorithm and improving the reliability during switching. To achieve the above object, an embodiment of the present application provides a method for controlling a compressor, including: collecting real-time rotating speed of the compressor, and calculating a first compensation current required for restraining rotating speed fluctuation according to the real-time rotating speed and the rotating speed fluctuation; collecting real-time current of the operation of the compressor, and calculating a second compensation current required for suppressing current fluctuation according to the real-time current and the current harmonic fluctuation; According to the real-time rotating speed of the compressor, performing first filtering treatment on the first compensation current, performing second filtering treatment on the second compensation current, and adding and processing the filtering treatment results to obtain a compensation current curve, wherein the compensation current curve is a curve of the change of the compensation current along with time; the compensation current profile is injected into a m