KR20100003580A - Motor controller of air conditioner - Google Patents
Motor controller of air conditioner Download PDFInfo
- Publication number
- KR20100003580A KR20100003580A KR1020080063551A KR20080063551A KR20100003580A KR 20100003580 A KR20100003580 A KR 20100003580A KR 1020080063551 A KR1020080063551 A KR 1020080063551A KR 20080063551 A KR20080063551 A KR 20080063551A KR 20100003580 A KR20100003580 A KR 20100003580A
- Authority
- KR
- South Korea
- Prior art keywords
- inverter
- converter
- power
- command value
- switching
- Prior art date
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Classifications
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
- F25B49/025—Motor control arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
- H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
- H02P27/06—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using dc to ac converters or inverters
-
- 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
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Inverter Devices (AREA)
- Air Conditioning Control Device (AREA)
Abstract
Description
The present invention relates to an electric motor control apparatus of an air conditioner, and more particularly, to an electric motor control apparatus of an air conditioner capable of ensuring the safety of circuit elements in the control apparatus.
An air conditioner is a device that is disposed in a room, a living room, an office, or a business store to adjust a temperature, humidity, cleanliness, and airflow of an air to maintain a comfortable indoor environment.
Air conditioners are generally divided into one-piece and separate types. The integrated type and the separate type are functionally the same, but the integrated type integrates the functions of cooling and heat dissipation to install a hole in the wall of the house or hang the device on the window, and the separate type installs an indoor unit that performs cooling / heating on the indoor side and outdoor. On the side, an outdoor unit that performs heat dissipation and compression functions was installed, and two separate devices were connected by refrigerant pipes.
In the air conditioner, an electric motor is used for a compressor, a fan, and the like, and an electric motor control device for driving the air conditioner is used. The motor controller of the air conditioner receives a commercial AC power and converts it into a DC voltage, converts the DC voltage into a commercial AC power with a predetermined frequency, and supplies the motor to the motor to control a motor such as a compressor or a fan.
On the other hand, the motor control apparatus of the air conditioner drives the motor using a high voltage and a high current, thereby increasing the possibility of damage to most circuit elements in the motor control apparatus, various methods have been proposed to protect this.
An object of the present invention is to provide an electric motor control apparatus for an air conditioner that can ensure the safety of circuit elements in the control apparatus.
The motor control apparatus of the air conditioner according to the embodiment of the present invention for solving the above-mentioned problems and other problems, the first inverter for converting the input DC power to AC power by switching operation to drive the motor; And a second inverter connected in parallel to the first inverter and converting the DC power into AC power by a switching operation to drive the motor.
The motor control apparatus of the air conditioner according to the embodiment of the present invention for solving the above-mentioned problems and other problems, the first converter for converting the commercial AC power input to the DC power by a switching operation, and the first converter And a second converter connected in parallel to the commercial AC power and converting the commercial AC power into DC power by a switching operation.
As described above, the motor control apparatus of the air conditioner according to the embodiment of the present invention can reduce the current flowing through each inverter by connecting the first inverter and the second inverter in parallel, so that the stability of the inverter element is, of course, Therefore, it is possible to ensure the safety of the entire circuit elements in the control device. Furthermore, a relatively inexpensive inverter can be used, thereby reducing manufacturing costs.
In addition, when converting to a DC power source using a three-phase AC power supply, by connecting the first converter and the second converter in parallel, the current flowing through each converter can be reduced, so that not only the stability of the converter element but also the control device It is possible to ensure the safety of the entire circuit elements. In addition, manufacturing cost is reduced.
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
1 is a schematic diagram of an air conditioner according to the present invention.
Referring to the drawings, the air conditioner 40 is largely divided into an indoor unit (I) and an outdoor unit (O).
The outdoor unit O includes a
The indoor unit (I) is disposed in the room to perform the cooling / heating function of the indoor side heat exchanger (5), and the indoor fan (9a) and the room arranged on one side of the indoor side heat exchanger (5) to promote heat dissipation of the refrigerant. And an
At least one indoor side heat exchanger (5) may be installed. The
In addition, the air conditioner 40 may be configured as a cooler for cooling the room, or may be configured as a heat pump for cooling or heating the room.
On the other hand, the electric motor in the motor control apparatus of the air conditioner according to an embodiment of the present invention may be each electric motor (2b, 5b, 9b) to operate the outdoor fan, compressor or indoor fan shown in the figure.
2 is a circuit diagram illustrating a motor control apparatus of an air conditioner according to an embodiment of the present invention.
Referring to the drawings, the
The reactor L is disposed between the commercial AC power supply and the
The
The
The smoothing capacitor C is connected to the output terminal of the
The
The
In the
The switching elements in the
As such, by using the
Three-phase
The three-phase
On the other hand, the
The output current detecting means E detects the output current of the output terminal of the
The output current detecting means E may be a shunt resistor having one end connected to three lower arm switching elements of the
Meanwhile, when the
In the drawing, the
FIG. 3 is an internal block diagram of the microcomputer of FIG. 2.
Referring to the drawings, the
The estimating
The
The voltage
The switching control
4 is a circuit diagram illustrating a motor control apparatus of an air conditioner according to an embodiment of the present invention.
Referring to the drawings, the
The electric
The
The
In the drawings, a commercial AC power source is shown as a three-phase AC power source, but may be a single-phase AC power source.
The
The switching elements in the
As such, by using the
The
The input current detecting means A detects an input current i i input from a commercial AC power supply. To this end, a current sensor, a CT (current trnasformer), a shunt resistor, or the like may be used as the input current detecting means A. FIG. The detected input current i i is input to the
The dc end voltage detection means D detects the dc end voltage Vdc which is both ends of the smoothing capacitor C. To this end, the dc end voltage detection means (D) includes a resistor or the like. The detected dc terminal voltage Vdc is input to the
On the other hand, it is also possible to further include an output current detecting means for detecting (i o), the output current for the generation of the inverter switching control signal (Sic) of the
In the drawing, the
FIG. 5 is an internal block diagram of the microcomputer of FIG. 4.
Referring to the drawings, the
The
The voltage
The switching control
Although the embodiments of the present invention have been described above with reference to the accompanying drawings, the technical configuration of the present invention described above may be modified in other specific forms by those skilled in the art to which the present invention pertains without changing its technical spirit or essential features. It will be appreciated that it may be practiced. Therefore, the embodiments described above are to be understood as illustrative and not restrictive in all aspects. In addition, the scope of the present invention is shown by the claims below, rather than the above detailed description. Also, it is to be construed that all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention.
1 is a schematic diagram of an air conditioner according to the present invention.
2 is a circuit diagram illustrating a motor control apparatus of an air conditioner according to an embodiment of the present invention.
FIG. 3 is an internal block diagram of the microcomputer of FIG. 2.
4 is a circuit diagram illustrating a motor control apparatus of an air conditioner according to an embodiment of the present invention.
FIG. 5 is an internal block diagram of the microcomputer of FIG. 4.
<Explanation of symbols on main parts of the drawings>
210: converter 220: first inverter
225:
410: first converter 415: second converter
420: inverter
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020080063551A KR20100003580A (en) | 2008-07-01 | 2008-07-01 | Motor controller of air conditioner |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020080063551A KR20100003580A (en) | 2008-07-01 | 2008-07-01 | Motor controller of air conditioner |
Publications (1)
Publication Number | Publication Date |
---|---|
KR20100003580A true KR20100003580A (en) | 2010-01-11 |
Family
ID=41813347
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020080063551A KR20100003580A (en) | 2008-07-01 | 2008-07-01 | Motor controller of air conditioner |
Country Status (1)
Country | Link |
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KR (1) | KR20100003580A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101331954B1 (en) * | 2011-12-12 | 2013-11-22 | 엘지전자 주식회사 | Air conditioner and controlling apparatus of the same |
CN104052274A (en) * | 2013-03-13 | 2014-09-17 | Lg电子株式会社 | Power converter and air conditioner having the same |
CN105783202A (en) * | 2016-04-28 | 2016-07-20 | 武汉阿帕科技有限公司 | Electric power energy-saving management system, method and device |
KR20180079821A (en) * | 2017-01-02 | 2018-07-11 | 엘지전자 주식회사 | Chiller |
-
2008
- 2008-07-01 KR KR1020080063551A patent/KR20100003580A/en not_active Application Discontinuation
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101331954B1 (en) * | 2011-12-12 | 2013-11-22 | 엘지전자 주식회사 | Air conditioner and controlling apparatus of the same |
CN104052274A (en) * | 2013-03-13 | 2014-09-17 | Lg电子株式会社 | Power converter and air conditioner having the same |
EP2779406A3 (en) * | 2013-03-13 | 2015-08-26 | LG Electronics, Inc. | Power converter and air conditioner having the same |
US9742336B2 (en) | 2013-03-13 | 2017-08-22 | Lg Electronics Inc. | Air conditioner with variable power converter |
CN104052274B (en) * | 2013-03-13 | 2017-11-28 | Lg电子株式会社 | Power-converting device and the air conditioner for possessing the power-converting device |
CN105783202A (en) * | 2016-04-28 | 2016-07-20 | 武汉阿帕科技有限公司 | Electric power energy-saving management system, method and device |
KR20180079821A (en) * | 2017-01-02 | 2018-07-11 | 엘지전자 주식회사 | Chiller |
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