KR20130027264A - Control method of a electric compressor - Google Patents

Control method of a electric compressor Download PDF

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Publication number
KR20130027264A
KR20130027264A KR1020110090746A KR20110090746A KR20130027264A KR 20130027264 A KR20130027264 A KR 20130027264A KR 1020110090746 A KR1020110090746 A KR 1020110090746A KR 20110090746 A KR20110090746 A KR 20110090746A KR 20130027264 A KR20130027264 A KR 20130027264A
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KR
South Korea
Prior art keywords
temperature
temperature sensor
electric compressor
sensor
motor
Prior art date
Application number
KR1020110090746A
Other languages
Korean (ko)
Inventor
이영훈
박성준
김태완
조성국
김스라
정경훈
Original Assignee
한라공조주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 한라공조주식회사 filed Critical 한라공조주식회사
Priority to KR1020110090746A priority Critical patent/KR20130027264A/en
Publication of KR20130027264A publication Critical patent/KR20130027264A/en

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/02—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents
    • F04C18/0207—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form
    • F04C18/0215—Rotary-piston pumps specially adapted for elastic fluids of arcuate-engagement type, i.e. with circular translatory movement of co-operating members, each member having the same number of teeth or tooth-equivalents both members having co-operating elements in spiral form where only one member is moving
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
    • F04C28/28—Safety arrangements; Monitoring
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/08—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors
    • H02H7/085—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load
    • H02H7/0852—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for dynamo-electric motors against excessive load directly responsive to abnormal temperature by using a temperature sensor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2210/00—Fluid
    • F04C2210/26—Refrigerants with particular properties, e.g. HFC-134a
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2240/00—Components
    • F04C2240/40—Electric motor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S415/00—Rotary kinetic fluid motors or pumps
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S417/00—Pumps

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Inverter Devices (AREA)

Abstract

PURPOSE: A method for controlling an electric compressor is provided to simultaneously measure the temperature of a power switching element for controlling the actuation of the compressor, and the temperature of a printed circuit board, thereby preventing the damage of circuit elements installed in an inverter. CONSTITUTION: A method for controlling an electric compressor comprises: a step(S200) of detecting the temperature of a first temperature sensor(27) and a second temperature sensor; a step(S300) of monitoring whether or not the temperature of the first temperature sensor is higher than a predetermined limit temperature; a step(S500) of monitoring whether or not the temperature of the second temperature sensor is higher than a predetermined limit temperature; and a step(S600) of controlling whether the electric compressor is actuated by the detected temperatures from the first temperature sensor and the second temperature sensor. [Reference numerals] (AA) Start; (BB,DD) Yes; (CC,EE) No; (FF) End; (S100) Air-conditioner ON; (S200) Detecting IGBT temperature, detecting PCB temperature; (S300) PCB temperature > PCB temperature limit; (S400) Stopping the operation of an electric compressor; (S500) IGBT temperature > IGBT temperature limit; (S600) Driving the electric compressor

Description

Control method of electric compressor {Control method of a electric compressor}

The present invention relates to a control method of a motor-driven compressor, and more particularly, to a control method of a motor-driven compressor for preventing damage to various circuit elements responsible for driving the motor by high temperature.

Generally, a configuration related to an electric compressor used as an automotive air conditioner is illustrated in FIG. 1.

As shown in the figure, the rear housing 50 in which the front housing 10 through which the refrigerant is sucked from the outside, the intermediate housing 30 through which the refrigerant is compressed, and the discharge chamber 51 through which the compressed refrigerant is discharged are formed. It is configured to include).

First, the motor chamber 11 is formed inside the front housing 10. The motor chamber 11 is a portion where the motor 60, which is a driving source of the electric compressor 1, is installed. A suction port (not shown) is formed at one side of the front housing 10. The refrigerant introduced into the suction port passes through the motor chamber 11 and moves to the compression chamber S for compressing the refrigerant.

The motor 60 is composed of a stator 61 and a rotor 71. The stator 61 has a cylindrical shape with its center penetrated, and is made by stacking a plurality of core pieces. A coil is wound around the stator 61. The stator 61 is fixed to the inner surface of the front housing 10.

The rotor 70 is installed inside the stator 61. The rotor 70 has a substantially cylindrical shape and is formed by stacking a plurality of core pieces. When a current flows through the coil of the stator 61, a magnetic field is generated, and the rotor 70 rotates.

The inverter assembly 20 is assembled at the lower end of the front housing 10. An inverter chamber 24 is formed in the inverter assembly 20. The inverter chamber 24 is a space in which an inverter 22 for controlling rotation of the motor 60 is installed.

The inverter 22 includes a printed circuit board 25 on which various circuit components are mounted, an Insulated Gate Bipolar Transistor (IGBT) 26, which is a switching element mounted on the printed circuit board 25, and various circuit devices. do. The printed circuit board 25 is coupled to the support body and assembled to the inverter assembly 20. The inverter 22 is electrically connected to the motor 60 to control the rotation speed of the motor 60. By controlling the rotational speed of the motor 60 by the inverter 22, the amount of compression of the refrigerant is controlled and the interior of the vehicle is kept constant at a desired temperature.

Next, the compression mechanism 40 is installed inside the intermediate housing 30. The compression mechanism 40 is to suck and compress the refrigerant entering the inside of the intermediate housing 30, and receives the power from the motor 60 to compress the refrigerant.

The front housing 50 is coupled to the front of the intermediate housing 30, that is, the position facing the discharge port 44 of the fixed scroll 41. The front housing 50 is formed with a discharge chamber 51 through which the refrigerant is discharged from the discharge port 44. In addition, a discharge port (not shown) is formed in the front housing 50. The discharge port is a portion formed to connect the discharge chamber 51 and the outside. Refrigerant is delivered to other components of the air conditioner through the discharge port.

In the motor-driven compressor having such a configuration, when the inverter 22 is driven in a state where the outside air temperature is high, there is a possibility that various elements constituting the inverter may be damaged. Therefore, a control logic is provided to prevent various elements from being damaged by temperature by attaching a temperature sensor near the switching element IGBT, which generates a lot of heat, among the various elements, using the temperature sensed by the temperature sensor.

The control logic will be described in detail as follows. Referring to FIG. 2, in the related art, a temperature of a switching element IGBT, which is a device that generates the most heat among various components of the inverter, is detected (S10), and whether the detected temperature of the switching element IGBT is greater than or equal to a limit temperature. Detect (S20). If the temperature of the switching element IGBT is detected to be higher than the limit temperature, the driving of the motor compressor is stopped. If the temperature of the switching element IGBT is detected to be lower than the limit temperature, the motor continues to be driven.

However, according to the control method of the conventional electric compressor as described above, the switching element (IGBT) is determined by detecting only the temperature near the switching element (IGBT) among the various elements of the inverter to determine whether to drive the motor. Even if the temperature does not exceed the limit temperature, other circuit elements may exceed the limit temperature. When this situation occurs, other circuit elements constituting the inverter are damaged by heat, and thus, the inverter is broken and thus the motor cannot be driven.

The present invention is to solve the problems described above, and to provide a control method for preventing various circuit elements mounted on the inverter from being damaged by heat.

According to a feature of the present invention for achieving the above object, in a control method of an electric compressor driven by a motor, the first temperature sensor for sensing the temperature of one side of the inverter for controlling the drive of the motor, and And a second temperature sensor for sensing a temperature at a position away from the first temperature sensor, the temperature sensing of the first temperature sensor and the second temperature sensor; and the first temperature sensor Monitoring whether the temperature is higher than a preset limit temperature, monitoring whether the temperature of the second temperature sensor is higher than a preset limit temperature, and from the first temperature sensor and the second temperature sensor Technically, the method includes controlling whether the electric compressor is driven using the sensed temperature.

At this time, when the temperature detected by the first temperature sensor is above the limit temperature, it is preferable to stop the driving of the electric compressor.

When the temperature sensed by the first temperature sensor is below the limit temperature and the temperature sensed by the second temperature sensor is above the limit temperature, it is preferable to stop the driving of the electric compressor.

In addition, the first temperature sensor is a sensor for sensing the temperature of the IGBT, the second temperature sensor is preferably a sensor for sensing the temperature of the PCB.

According to the present invention as described above, by measuring the temperature of the power switching element for controlling the operation of the motor compressor and the temperature of the printed circuit board at the same time to stop the drive of the motor compressor if any one temperature is detected to be above the limit temperature. This has the effect of preventing damage to the circuit elements provided in the inverter.

1 is a cross-sectional view showing the configuration of a general electric compressor,
2 is a flow chart showing a control method of the electric compressor according to the prior art,
3 is a plan view showing a state of the PCB showing a state in which the temperature sensor according to the present invention is installed,
Figure 4 is a flow chart showing a control method of the electric compressor according to the present invention.

Hereinafter, with reference to the accompanying drawings a specific embodiment of the control method of the electric compressor according to the present invention as described above will be described in detail. In the embodiment of the present invention, the configuration of the motor-driven compressor is substantially the same as that of the general motor-driven compressor described in the background art of the present invention.

However, the present invention is provided with a temperature sensor in two places on the printed circuit board mounted with an inverter. Referring to FIG. 3, the first temperature sensor 27 is used to detect the temperature of the switching element IGBT that generates the most heat in the inverter and is mounted near the printed circuit board on which the switching element IGBT is mounted. . That is, the temperature measured by the first temperature sensor 27 corresponds to the temperature of the switching element IGBT.

In addition, the second temperature sensor 29 is installed at a point away from the switching element IGBT. Here, the temperature measured by the second temperature sensor 29 may be referred to as a PCB temperature. By using the temperature sensed by the second temperature sensor 29 is implemented a control method for preventing other circuit elements mounted on the printed circuit board from being damaged by high temperature.

The installation distance between the first temperature sensor 27 and the second temperature sensor 29 is preferably installed at a distance such that other circuit elements are not affected by the switching element IGBT. According to the embodiment of the present invention, the second temperature sensor 29 is installed at least 6 mm away from the first temperature sensor 27.

Hereinafter, the control method of the electric compressor according to the present invention will be described in detail. 4 is a flowchart illustrating a method of controlling a motor-driven compressor according to a specific embodiment of the present invention.

Referring to the drawings, the control method of the electric compressor according to a specific embodiment of the present invention, first starts from the 100 step (S100) for turning on the air conditioning apparatus to start the drive of the electric compressor.

When the driving of the electric compressor is started in step 100, the first temperature sensor 27 detects the temperature of the IGBT and the second temperature sensor 29 detects the temperature of the PCB, respectively (S200). Unlike the related art, in the present invention, two temperature sensing sensors are mounted on a printed circuit board on which an inverter is mounted, as well as the temperature of the switching element IGBT which generates the most heat, as well as the temperature of other circuit elements a certain distance away from the switching element. Will be measured.

Among the temperatures detected in step 200, first, it is detected whether the PCB temperature detected by the second temperature sensor 29 is higher than the limit temperature (S300). If it is confirmed that the temperature sensed by the second temperature sensor 29 is higher than the limit temperature, the driving of the electric compressor is stopped (S400) to prevent damage to the circuit device. If it is determined that the temperature sensed by the second temperature sensor 29 is below the limit temperature, the process proceeds to the next step.

Next, when it is determined in step 300 that the PCB temperature detected by the second temperature sensor 29 is below the limit temperature, the first temperature sensor 27 detects whether the detected IGBT temperature is higher than the limit temperature. (S500). If it is confirmed that the IGBT temperature detected by the first temperature sensor 27 is higher than the limit temperature, it is possible to prevent damage to the circuit element by stopping the driving of the electric compressor (S400). And if it is confirmed that the temperature detected by the first temperature sensor 27 is less than the limit temperature it will continue to drive the electric compressor.

According to the control method of the motor-driven compressor according to the present invention as described above, by detecting the temperature of the two places on the printed circuit board on which the inverter is mounted, by stopping the driving of the motor-compressor if any one temperature is higher than the limit temperature In addition, the switching element IGBT having a high heat generation amount in the inverter can be protected from high temperature, and other circuit elements of the inverter can be prevented from being damaged by the high temperature.

The scope of the present invention is not limited to the embodiments described above, but may be defined by the scope of the claims, and those skilled in the art may make various modifications and alterations within the scope of the claims It is self-evident.

1: compressor 10: front housing
11: motor room 12: rotating shaft
20: inverter assembly 22: inverter
24: inverter room 30: middle housing
35: eccentric bush 40: compression mechanism
50: rear housing 60: motor
61: stator 70: rotor

Claims (4)

In the control method of the electric compressor driven by a motor,
A first temperature sensor 27 for sensing the temperature of one side of the inverter for controlling the drive of the motor, and the second temperature sensor 29 for detecting the temperature of a position away from the first temperature sensor 27 a predetermined distance Including,
Sensing the temperatures of the first temperature sensor 27 and the second temperature sensor 29;
Monitoring whether the temperature of the first temperature sensor 27 is higher than a preset limit temperature;
Monitoring whether the temperature of the second temperature sensor 29 is higher than a preset limit temperature; And
And controlling whether the electric compressor is driven by using the temperature detected by the first temperature sensor (27) and the second temperature sensor (29). The method of claim 1,
The control method of the electric compressor to stop the driving of the electric compressor when the temperature sensed by the first temperature sensor (27) is above the limit temperature. The method of claim 1,
The control method of the electric compressor to stop the operation of the electric compressor when the temperature detected by the first temperature sensor 27 is less than the limit temperature, and the temperature detected by the second temperature sensor 29 is above the limit temperature. The method of claim 1,
The first temperature sensor (27) is a sensor for sensing the temperature of the IGBT, the second temperature sensor (29) is a control method of the electric compressor, characterized in that the sensor for detecting the temperature of the PCB.
KR1020110090746A 2011-09-07 2011-09-07 Control method of a electric compressor KR20130027264A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110090746A KR20130027264A (en) 2011-09-07 2011-09-07 Control method of a electric compressor

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Application Number Priority Date Filing Date Title
KR1020110090746A KR20130027264A (en) 2011-09-07 2011-09-07 Control method of a electric compressor

Publications (1)

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KR20130027264A true KR20130027264A (en) 2013-03-15

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KR1020110090746A KR20130027264A (en) 2011-09-07 2011-09-07 Control method of a electric compressor

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9790944B2 (en) 2013-12-05 2017-10-17 Kabushiki Kaisha Toyota Jidoshokki Motor-driven compressor with switching element
US9938976B2 (en) 2013-12-05 2018-04-10 Kabushiki Kaisha Toyota Jidoshokki Motor-driven compressor with switching element
US9964111B2 (en) 2013-12-05 2018-05-08 Kabushiki Kaisha Toyota Jidoshokki Motor-driven compressor with switching element

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9790944B2 (en) 2013-12-05 2017-10-17 Kabushiki Kaisha Toyota Jidoshokki Motor-driven compressor with switching element
US9938976B2 (en) 2013-12-05 2018-04-10 Kabushiki Kaisha Toyota Jidoshokki Motor-driven compressor with switching element
US9964111B2 (en) 2013-12-05 2018-05-08 Kabushiki Kaisha Toyota Jidoshokki Motor-driven compressor with switching element

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