CN117662444A - Automatic identification system for refrigerator compressor - Google Patents
Automatic identification system for refrigerator compressor Download PDFInfo
- Publication number
- CN117662444A CN117662444A CN202311694245.4A CN202311694245A CN117662444A CN 117662444 A CN117662444 A CN 117662444A CN 202311694245 A CN202311694245 A CN 202311694245A CN 117662444 A CN117662444 A CN 117662444A
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- Prior art keywords
- current
- compressor
- phase
- circuit
- collecting
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- 238000004891 communication Methods 0.000 claims abstract description 6
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
The invention discloses an automatic identification system of a refrigerator compressor, which comprises a main control circuit, an inverter driving circuit, an MCU circuit and a current acquisition circuit, wherein the inverter circuit converts a high-voltage direct-current power supply into a three-phase alternating-current power supply to supply power to a variable-frequency compressor, and the current acquisition circuit acquires current and voltage signals of the inverter circuit and is in communication connection with the MCU; the MCU presets two or more compressor variable frequency control programs, and recognizes the compressors installed on the refrigerator through the following steps, thereby executing built-in, different compressor driving programs. The invention can automatically identify the motor parameters of the compressor, thereby selecting proper parameters for driving the compressor, realizing the compatibility of different compressors, reducing the material classification, improving the universality and reducing the production error rate.
Description
Technical Field
The invention relates to the technical field of refrigerators, in particular to an automatic identification system for a refrigerator compressor.
Background
At present, when different compressors are used in the whole machine refrigerator in the industry, driving software corresponding to different parameters is required to be used for driving, namely, the refrigerator cannot identify the used compressors, and a plurality of proper driving programs for the different compressors are not preset in the system, so that different variable frequency control boards are matched with the refrigerators of different models, the generalization cannot be realized, and therefore, the applicant needs to research an automatic identification system which can be compatible with the different compressors.
Disclosure of Invention
The invention aims to provide an automatic identification system for a refrigerator compressor, which can automatically identify motor parameters of the compressor, so that proper parameters are selected for driving the compressor, and different compressors are compatible, so that the defects of the prior art are overcome.
The automatic identification system for the refrigerator compressor comprises a main control circuit, an inverter driving circuit, an MCU circuit and a current acquisition circuit, wherein the inverter circuit converts a high-voltage direct-current power supply into a three-phase alternating-current power supply to supply power to the variable-frequency compressor, and the current acquisition circuit acquires current and voltage signals of the inverter circuit and is in communication connection with the MCU; the MCU presets two or more compressor variable frequency control programs, and identifies the compressors installed on the refrigerator by the following steps, thereby executing built-in, different compressor driving programs:
s1) opening a U-phase upper bridge and a V-phase lower bridge of an inverter circuit, keeping the W-phase upper bridge and the W-phase lower bridge to be turned off, collecting V-phase current, and waiting for the V-phase current to reach a set current I 0 1/2 of the number of (3),
s2) collecting current and voltage, recording as Iuv and Uuv, and obtaining a phase resistance of rs= Uuv/Iuv; collecting current and voltage again at interval t, and calculating an inductance value Ld=I, wherein, the I represents multiplication and the I represents division;
s3) opening the U-phase lower bridge and the V-phase upper bridge of the inverter circuit, keeping the W-phase upper and lower bridges switched off, collecting the U-phase current, and waiting for the U-phase current to reach the set current I 0 1/2 of the number of (3),
s4) collecting current and voltage to the U-phase resistor, collecting the current and the voltage again at intervals t, and calculating an inductance value Lq=I t/U;
s5) operating the compressor according to a preset motor parameter back electromotive force coefficient Ke1, obtaining a stable frequency F after the operation is stable, and calculating the output voltage Va of the compressor according to the F;
s6) calculating a back electromotive force coefficient Ke;
s7) selecting a corresponding variable frequency compressor drive control program according to the parameter Rs, ld, lq, ke.
The beneficial effects of the invention are as follows: the invention can automatically identify the motor parameters of the compressor, thereby selecting proper parameters for driving the compressor, realizing the compatibility of different compressors, reducing the material classification, improving the universality and reducing the production error rate.
Drawings
FIG. 1 is a flow chart of an automatic compressor identification system of the present invention.
Fig. 2 is a schematic diagram of an inverter driving circuit of the automatic identification system for a compressor according to the present invention.
Fig. 3 is a schematic diagram of an inverter circuit of the automatic identification system for a compressor according to the present invention.
Fig. 4 is a schematic diagram of a current acquisition circuit of the automatic identification system of the compressor of the present invention.
Fig. 5 is a schematic circuit diagram of an MCU of the automatic identification system of a compressor according to the present invention.
Fig. 6 is a schematic diagram of a power supply circuit of the automatic identification system of the compressor of the present invention.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In the description of the present invention, it should be understood that the terms "center," "lateral," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "coupled" are to be construed broadly, as well as fixedly coupled, for example, unless explicitly stated or limited otherwise. Or can be detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. It will be understood by those of ordinary skill in the art that the terms described above are in the specific sense of the present invention.
The invention discloses an automatic identification system of a refrigerator compressor, which comprises a main control circuit, an inverter driving circuit, an MCU circuit and a current acquisition circuit. The inverter circuit outputs +310v direct current power supply to be UVW alternating current power supply for driving the start and stop of the variable frequency compressor. The current acquisition circuit acquires current and voltage signals of the inverter circuit and is in communication connection with the MCU, see the singlechip interface 29-32 of the MCU circuit in FIG. 3, and the singlechip interface 29-32 is used for acquiring electric signals of IW-, IW+, IV-, IV+.
Referring to fig. 1, the mcu presets two or more compressor variable frequency control programs and recognizes compressors installed on the refrigerator by the following steps, thereby executing built-in, different compressor driving programs:
s1) opening a U-phase upper bridge and a V-phase lower bridge of an inverter circuit, keeping the W-phase upper bridge and the W-phase lower bridge to be turned off, collecting V-phase current, and waiting for the V-phase current to reach a set current I 0 1/2 of the number of (3),
s2) collecting current and voltage, recording as Iuv and Uuv, and obtaining a phase resistance of rs= Uuv/Iuv; collecting current and voltage again at interval t, and calculating an inductance value Ld=I, wherein, the I represents multiplication and the I represents division;
s3) opening the U-phase lower bridge and the V-phase upper bridge of the inverter circuit, keeping the W-phase upper and lower bridges switched off, collecting the U-phase current, and waiting for the U-phase current to reach the set current I 0 1/2 of the number of (3),
s4) collecting current and voltage to the U-phase resistor, collecting the current and the voltage again at intervals t, and calculating an inductance value Lq=I t/U;
s5) operating the compressor according to a preset motor parameter back electromotive force coefficient Ke1, obtaining a stable frequency F after the operation is stable, and calculating the output voltage Va of the compressor according to the F;
s6) calculating a back electromotive force coefficient Ke;
s7) selecting a corresponding variable frequency compressor drive control program according to the parameter Rs, ld, lq, ke.
Referring to fig. 2-6, the automatic identification system for the refrigerator compressor of the invention is characterized in that an inverter driving circuit and an inverter circuit are respectively connected at ports marked as UA, UB, VA, VB, WA, WB so as to drive the inverter circuit, the inverter circuit respectively outputs U, V, W three-phase voltages in three phases, a current acquisition circuit acquires three-phase currents of the inverter circuit by adopting a resistance circuit, and electric signals of iv+, iv-, iw+ and Iw-are output through 29, 30, 31 and 32 ports of an MCU so as to complete communication.
All the components involved in the present invention may be universal standard components or components known to those skilled in the art, and the structure, principle and control manner thereof are known to those skilled in the art through technical manuals or through routine experimental methods.
The above description is only a preferred embodiment of the present invention, and the technical scope of the present invention is not limited in any way, so that other automatic recognition systems for refrigerator compressors obtained by adopting the same or similar technical features as those of the above embodiment of the present invention are all within the protection scope of the present invention.
Claims (1)
1. An automatic identification system for a refrigerator compressor is characterized in that: the inverter comprises a main control circuit, an inverter driving circuit, an MCU circuit and a current acquisition circuit, wherein the inverter circuit converts a high-voltage direct-current power supply into a three-phase alternating-current power supply to supply power to a variable-frequency compressor, and the current acquisition circuit acquires current and voltage signals of the inverter circuit and is in communication connection with the MCU; the MCU presets two or more compressor variable frequency control programs, and identifies the compressors installed on the refrigerator by the following steps, thereby executing built-in, different compressor driving programs:
s1) opening a U-phase upper bridge and a V-phase lower bridge of an inverter circuit, keeping the W-phase upper bridge and the W-phase lower bridge to be turned off, collecting V-phase current, and waiting for the V-phase current to reach a set current I 0 1/2 of the number of (3),
s2) collecting current and voltage, recording as Iuv and Uuv, and obtaining a phase resistance of rs= Uuv/Iuv; collecting current and voltage again at interval t, and calculating an inductance value Ld=I, wherein, the I represents multiplication and the I represents division;
s3) opening the U-phase lower bridge and the V-phase upper bridge of the inverter circuit, keeping the W-phase upper and lower bridges switched off, collecting the U-phase current, and waiting for the U-phase current to reach the set current I 0 1/2 of the number of (3),
s4) collecting current and voltage to the U-phase resistor, collecting the current and the voltage again at intervals t, and calculating an inductance value Lq=I t/U;
s5) operating the compressor according to a preset motor parameter back electromotive force coefficient Ke1, obtaining a stable frequency F after the operation is stable, and calculating the output voltage Va of the compressor according to the F;
s6) calculating a back electromotive force coefficient Ke;
s7) selecting a corresponding variable frequency compressor drive control program according to the parameter Rs, ld, lq, ke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311694245.4A CN117662444A (en) | 2023-12-11 | 2023-12-11 | Automatic identification system for refrigerator compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311694245.4A CN117662444A (en) | 2023-12-11 | 2023-12-11 | Automatic identification system for refrigerator compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117662444A true CN117662444A (en) | 2024-03-08 |
Family
ID=90069568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311694245.4A Pending CN117662444A (en) | 2023-12-11 | 2023-12-11 | Automatic identification system for refrigerator compressor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117662444A (en) |
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2023
- 2023-12-11 CN CN202311694245.4A patent/CN117662444A/en active Pending
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