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WO1999005779A1 - Procede et dispositif de commande de l'entrainement d'un conditionneur d'air - Google Patents

Procede et dispositif de commande de l'entrainement d'un conditionneur d'air Download PDF

Info

Publication number
WO1999005779A1
WO1999005779A1 PCT/JP1998/003258 JP9803258W WO9905779A1 WO 1999005779 A1 WO1999005779 A1 WO 1999005779A1 JP 9803258 W JP9803258 W JP 9803258W WO 9905779 A1 WO9905779 A1 WO 9905779A1
Authority
WO
WIPO (PCT)
Prior art keywords
drive
switching element
air conditioner
brushless motor
compressor
Prior art date
Application number
PCT/JP1998/003258
Other languages
English (en)
Japanese (ja)
Inventor
Yoriyuki Takekawa
Nobukazu Takagi
Yuji Kawasaki
Original Assignee
Zexel Corporation
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 Zexel Corporation filed Critical Zexel Corporation
Publication of WO1999005779A1 publication Critical patent/WO1999005779A1/fr

Links

Classifications

    • 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
    • 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
    • F04B2203/00—Motor parameters
    • F04B2203/02—Motor parameters of rotating electric motors
    • F04B2203/0201—Current

Definitions

  • the present invention relates to a drive control method and apparatus for an air conditioner including a compressor driven by a DC brushless motor.
  • a rotation speed reduction command signal is output in the evening, and the rotation speed of the compressor is gradually reduced to reduce the compression speed.
  • a configuration is disclosed in which the compressor is stopped at a timing when the difference between the inlet pressure and the outlet pressure of the compressor becomes equal to or less than a predetermined value.
  • An object of the present invention is to provide an air conditioner drive control method and apparatus that can solve the above-described problems in an air conditioner including a compressor driven by a DC brushless motor.
  • Another object of the present invention is to prevent reverse rotation when the operation of the compressor is stopped without causing the above-described problems in the prior art, without providing a reverse rotation prevention mechanism in the compressor.
  • An object of the present invention is to provide a drive control method and apparatus for an air conditioner having a compressor driven by a DC brushless motor. Disclosure of the invention
  • a DC brushless motor including a magnet rotor and a set of drive windings; a compressor having a compression mechanism driven by the DC brushless motor; A first switching element group and a second switching element group for commutating a drive current from a DC power supply to the drive winding; and each of the first and second switching element groups is rotated.
  • the quenching device simultaneously conductive facedown state, thereby method as the least short-circuit state of one drive winding of the set of drive winding is provided.
  • the switching elements of the first and second switching element groups are turned on and off in accordance with the position of the rotor, and the drive current flowing through one set of drive windings is controlled.
  • the switching generates a rotating magnetic field.
  • the magnet rotor rotates, and the compression mechanism is rotationally driven by the DC brushless motor.
  • the on / off control is stopped and the first switching Control is performed so that a plurality of switching elements of the element group or a plurality of switching elements of the second switching element group are simultaneously turned on.
  • at least one drive winding is short-circuited, and a braking force can be applied to the rotation of the magnet rotor.
  • the configuration may be such that shoving is performed and intermittently turned on to limit the current flowing through the drive coil due to a short circuit.
  • Another feature of the present invention is a drive control device for an air conditioner including a compressor having a compression mechanism driven by a DC brushless motor including a magnet rotor and a set of drive windings.
  • a second switching element group connected between the first and second switching elements, a position detection circuit for detecting a rotational position of the magnet rotor, and a detection result of the position detection circuit.
  • each switching element of the first and second switching element groups in order to commutate the drive current supplied from the DC power supply to the drive winding so that a rotational force is applied to the rotor in response to the current;
  • Commutation control signal for off control A position feedback drive signal generating means for generating; and a stop control means for simultaneously controlling one of the plurality of switching elements of the first and second switching element groups to a conduction state.
  • the output of the commutation control signal from the position feedback drive signal generating means is stopped in response to a stop command signal, and the plurality of switching elements are simultaneously controlled to be conductive by the stop control means. It is in.
  • the switching elements of the first switching element group and the second switching element group are turned on and off by the commutation control signal, and the drive current flowing through one set of drive windings is controlled.
  • the switching generates a rotating magnetic field, which rotates the magnet rotor, and drives the compression mechanism to rotate.
  • the stop command signal is given, the output of the commutation control signal is stopped, the on / off control for each switching element is stopped, and the first or second switching is performed by the stop control means.
  • a plurality of switching elements of the element group are simultaneously controlled to be conductive. As a result, at least one drive winding is short-circuited, and a braking force can be applied to the rotation of the magnet rotor.
  • the rotation of the magnet rotor is suppressed by the short-circuiting of the drive windings, and the rotation of the DC brushless motor is reduced.
  • the compressor can be effectively prevented from rotating in the reverse direction, and the compressor can be prevented from being damaged. If the input / output pressure difference at the time of the compressor rotation stop command is large, the compressor will overcome the above-mentioned braking force acting on the DC brushless motor and rotate slightly in the reverse direction. This has the effect of reducing the input / output pressure difference of the machine and facilitating restarting.
  • ADVANTAGE OF THE INVENTION According to this invention, it can prevent reverse rotation of a compressor at very low cost, and can suppress generation
  • FIG. 1 is a system diagram showing one embodiment of an air conditioner according to the present invention.
  • FIG. 2 is a schematic vertical sectional view showing a compression mechanism of the scroll-type electric compressor shown in FIG.
  • FIG. 3 is a schematic longitudinal sectional view taken along the line BB shown in FIG.
  • FIG. 4 is a circuit diagram showing a circuit configuration of the DC brushless motor shown in FIG. 1 and its drive control device.
  • FIG. 5 is a detailed circuit diagram of the position detection circuit shown in FIG.
  • FIG. 6 is a waveform diagram of each signal for explaining the commutation control of the drive current in the drive control device shown in FIG.
  • FIG. 7 is a flowchart showing a control program for realizing a function equivalent to the function of the control unit shown in FIG. 4 by using a micro-combination system.
  • FIG. 1 is a system diagram showing a schematic configuration of an embodiment of an air conditioner using a drive control device according to the present invention.
  • the air conditioner 100 is provided with a scroll-type electric compressor 1, a four-way switching valve 2, an outdoor heat exchanger 3, a throttle mechanism 4, an indoor heat exchanger 5, etc.
  • a known heat pump cycle is configured, and the refrigerant circulates during a cooling operation as indicated by a solid line arrow, and circulates during a heating operation as indicated by a broken line arrow.
  • the compressor 1 includes a scroll-type compression mechanism 10 and a DC brushless motor 30 built in a closed container 1C.
  • the DC brushless motor 30 is driven and controlled by the drive control device 40 to which DC power is supplied from the DC power source B.
  • a schematic configuration of the scroll-type compression mechanism 10 is shown in FIGS. 2 and 3.
  • Numeral 1 1 denotes a fixed scroll, which is composed of an end plate 1 ia, a spiral wrap 11 b erected on the inner surface thereof, and a peripheral wall 11 c surrounding the wrap.
  • Reference numeral 12 denotes an orbiting scroll, which is provided on an end plate 12a and an inner surface thereof, and includes a spiral wrap 12b having substantially the same shape as the spiral wrap 11b.
  • the fixed scroll 11 and the orbiting scroll 12 are decentered by a predetermined distance, and their phases are shifted by 180 ° to engage each other.
  • One compression chamber 13 is formed.
  • a drive bush 15 is rotatably fitted into a cylindrical boss 14 protruding from the center of the outer surface of the end plate 12 a of the orbiting scroll 12 via a bearing 16.
  • An eccentric pin 19 that projects eccentrically from the end surface of the rotary shaft 18 by a predetermined distance from the end face of the rotary shaft 18 is fitted into a slide hole 17 formed in the drive bush 15. When the rotating shaft 18 rotates, this rotational force is transmitted from the eccentric pin 19 through the slide hole 17 to the drive bush 15, and further, through the bearing 16 and the boss 14. It is transmitted to 1 and 2.
  • the orbiting scroll 12 orbits in a circular orbit around the axis of the rotating shaft 18 with a predetermined radius around the axis of the rotating shaft 18 in a state where the orbiting scroll 12 is prevented from rotating by a rotation preventing mechanism (not shown).
  • the gas wraps around the outer ends of the spiral wraps 1 lb and 1 2b and the opposite wrap.
  • each compression chamber 13 It is taken into the compression chamber 13 from the gap between the back side of 12b and 11b, and the compression chamber 13 moves toward the center of the spiral while reducing its volume. Accordingly, the gas in each compression chamber 13 is gradually compressed, and when each compression chamber 13 communicates with the central discharge chamber 21, it merges and is discharged from the discharge port 22.
  • a valve chamber 26 is formed in the middle of the discharge port 22, and a free check valve 23 is disposed in the valve chamber 26.
  • the check valve 23 abuts on the second valve seat 24 on the downstream side to open the discharge port 22, and the downstream of the discharge port 22.
  • the gas pressure is applied from the side, it comes into contact with the first valve seat 25 on the upstream side and closes the discharge port 22.
  • the DC brushless motor 30 includes a three-phase Y-connected A-phase drive winding 31, a B-phase drive winding 32, and a C-phase drive winding 33. And a set of drive windings and a magnet rotor 3 4. Since the DC brushless motor 30 itself has a known configuration, a detailed description of its structure is omitted.
  • the drive control device 40 for controlling the drive of the DC brushless motor 30 includes a commutator circuit 41 for commutating the drive current from the DC power source B to the drive windings 31 to 33. ing.
  • the commutator circuit 41 connects each terminal of the drive windings 31 to 33 with direct current.
  • a switching transistor 42 to 44 that constitutes a first switching element group connected to the positive terminal of the power source B, and a second terminal that connects each terminal of the drive windings 31 to 33 to the negative terminal of the DC power source B It has a known circuit configuration in which the switching transistors 45 to 47 and the diodes D1 to D6 constituting the above switching element group are connected as shown.
  • Position feedback drive signal generator 5 1 is outputted from the position detecting circuit 6 0 to be described later, a set of sensorless signal ZA indicating the occasional position of the magnet rotor 3 4, Z B, in response to Z c, One set of switches for turning on and off the switching transistors 42 to 47 in order to generate the rotating magnetic field required to rotate the magnet rotor 34 by one set of drive coils 31 to 33.
  • the bases of the switching transistors 42 to 47 are connected to the commutation control signals A u and A u from the position feedback drive signal generator 51 of the control unit 50 via the corresponding OR gates 52 to 57. Bu, Cu, A, B L , C L are provided.
  • the switching transistors 42 to 47 are turned on / off in accordance with the commutation control signals A u to CL, respectively, whereby commutation of the drive current from the DC power supply B to the drive windings 31 to 33 is performed.
  • the magnet rotor 34 is rotationally driven by the rotating magnetic field generated thereby.
  • the position detection circuit 60 determines the rotational position of the magnet rotor 34 from the back induced voltage induced in each of the drive windings 31 to 33 by the rotation of the magnet rotor 34, and determines the result.
  • sensorless signal Z a shown, Z B, and outputs the Zc, sensorless signal Z a, Z B, Zc is fed to the position feedback drive signal generator 5 first control Yuni' bets 5 0.
  • FIG. 5 shows a detailed circuit diagram of the position detection circuit 60.
  • the first differential amplifier circuit 61 is the terminal voltage V B TogaIri force between the terminal voltage V A of the drive winding 3 1 drive winding 3 2 first voltage difference signal is these voltage differences VBA is output.
  • Reference numeral 64 denotes a first comparator which receives the first voltage difference signal V BA and the second voltage difference signal V CB and supplies a sensorless signal Z A to the position feedback drive signal generator 51.
  • Reference numeral 65 denotes a second comparator which inputs the second voltage difference signal V CB and the third voltage difference signal V AC and supplies a sensorless signal Z B to the position feedback drive signal generator 51.
  • 6 6 is a third comparator receives a third voltage difference signal V AC and the first voltage difference signal V BA, giving a sensorless signal Z C to the position feedback drive signal generating unit 5 1.
  • FIG. 6 shows the waveforms of the commutation control signals Au to CL output in response to the sensorless signals ZA to Zc.
  • the control unit 50 responds to the stop command signal SC output from the stop command signal generator 80, and outputs a signal from the plurality of predetermined ones of the switching transistors 42 to 44.
  • Switching transistor or switching transistor 45 A stop control signal generator 5 that outputs a set of stop control signals SS for simultaneously turning on a plurality of switching transistors out of 5 to 47. Has eight.
  • a set of stop control signals SS output from the stop control signal generator 58 is applied to the bases of the corresponding switching transistors 42 to 47 via the OR gates 52 to 57.
  • the stop command signal SC is also input to the position feedback drive signal generator 51, and the position feedback drive signal generator 51 responds to the input of the stop command signal SC to generate commutation control signals A U to C. It is configured to stop the output of L.
  • the stop control signal generator 58 responds to the stop command signal SC and outputs a set of control signals for turning on the switching transistors 42, 43, and 44 simultaneously. It is configured to output as signal SS.
  • the terminals of the A-phase winding 31, the B-phase winding 32, and the C-phase winding 33 are short-circuited, thereby providing a braking force to the rotation of the magnet rotor 34. It has become. In this case, since all of the switching transistors 45 to 47 are off, No current flows from the source B to the DC brushless motor 30 via the commutator circuit 41.
  • the set of stop control signals SS described above is an example, and the present invention is not limited to this configuration.
  • Two of the group of switching transistors 42 to 44 for example, switching transistors Only 42, 4 and 3 may be turned on.
  • a configuration may be adopted in which two or more of the other group of switching transistors 45 to 47 are simultaneously turned on. In this case, three of them may be turned on at the same time, or any two of them may be turned on at the same time.
  • the selected switching transistors are completely turned on, and the switching transistors are turned on intermittently by cycling to limit the current flowing through the drive winding to a predetermined level or less. Thus, an excessive current may be prevented from flowing through the drive winding.
  • the output is stopped commutation control signal A u -C L from the position feedback driving signal generating unit 5 1 in response to an input of the stop command signal SC, alternatively 1
  • a set of stop control signals SS is output from the stop control signal generator 58, and the rotating drive windings 31, 32, and 33 of the DC brushless motor 30 are short-circuited.
  • a magnetic field that suppresses the rotation of the magnet rotor 34 is generated by the current flowing through the drive windings 31, 32, and 33. Rotation can be prevented without the addition of special circuit elements.
  • the control unit 50 may be configured using a microcomputer having a known hardware configuration.
  • FIG. 7 is a flowchart showing a control program of a microcomputer system configured to perform a function equivalent to the function of the control unit 50 shown in FIG.
  • the compressor 1 is operated at a rotation speed according to the air-conditioning load. This operation is performed by providing a sensor-less signal ZA from the position detecting circuit 6 0, Z B, in response to Z c in Community involvement Te Ichita circuit 4 1 a commutation control signals A u ⁇ C L You.
  • step 72 it is determined whether or not the stop command signal SC has been input. If the stop command signal SC has not been input, the flow returns to step 71 to continue the operation of the compressor 1.
  • Step 7 2 enters YES next scan Tetsupu 7 3, wherein one set of the control stop stops the output of the commutation control signals A u -C L A signal SS is output, and a predetermined switching transistor is turned on. Thereby, a braking force against the rotation of the magnet rotor 34 can be given.
  • step 74 it is determined whether a predetermined set time has elapsed after execution of step 73. This set time is set to a time necessary for the input / output pressure difference of the compressor 1 to become substantially zero after the stop command signal SC is input.
  • step 74 If it is determined in step 74 that the set time has not elapsed, the determination result in step 74 becomes NO, and the flow waits for the set time to elapse. When the set time has elapsed, the determination result of step 74 is YES, and the process proceeds to step 75. In step 75, the switching transistors 42 to 47 are all turned off, and the operation stop of the compressor 1 is completed.
  • the air conditioner drive control method and apparatus according to the present invention are useful for preventing reverse rotation of an air conditioner equipped with a compressor driven by a DC brushless motor when the operation is stopped. .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Motors That Do Not Use Commutators (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

L'invention concerne un procédé de commande de l'entraînement d'un conditionneur d'air (100) doté d'un compresseur (1) présentant un mécanisme de compression (10) entraîné par un moteur sans balais à courant continu (30), ce procédé consistant à commander simultanément plusieurs éléments de commutation spécifiques d'un premier groupe (42-44) d'éléments commutateurs, ainsi que plusieurs éléments de commutation spécifiques d'un second groupe (45-47) d'éléments commutateurs d'un circuit commutateur (41), lequel fournit des courants d'entraînement aux enroulements d'entraînement (31-33) du moteur sans balais (30) en réponse à un signal de commande d'arrêt (Sc), afin d'atteindre des états excités au moyen d'un signal de commande d'arrêt (SS) provenant d'une section de production (58) de signaux de commande d'arrêt. Il en résulte que les enroulements (31-33) sont court-circuités et qu'il est possible d'empêcher la rotation inverse du compresseur (1) provoquée par la différence entre la pression d'entrée et la pression de sortie du compresseur (1), sans avoir à doter le compresseur d'un quelconque mécanisme empêchant toute rotation inverse de celui-ci.
PCT/JP1998/003258 1997-07-24 1998-07-22 Procede et dispositif de commande de l'entrainement d'un conditionneur d'air WO1999005779A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP9212718A JPH1146494A (ja) 1997-07-24 1997-07-24 空気調和機
JP9/212718 1997-07-24

Publications (1)

Publication Number Publication Date
WO1999005779A1 true WO1999005779A1 (fr) 1999-02-04

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PCT/JP1998/003258 WO1999005779A1 (fr) 1997-07-24 1998-07-22 Procede et dispositif de commande de l'entrainement d'un conditionneur d'air

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JP (1) JPH1146494A (fr)
WO (1) WO1999005779A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013025753A2 (fr) 2011-08-17 2013-02-21 Trane International Inc. Freinage par rotation inverse pour un moteur pm
WO2017190917A1 (fr) * 2016-05-02 2017-11-09 Robert Bosch Gmbh Procédé de commande d'un circuit de pompe à chaleur incluant un moteur électrique d'un groupe compresseur, et circuit de pompe à chaleur
EP3429047A4 (fr) * 2016-03-09 2019-10-30 GD Midea Air-Conditioning Equipment Co., Ltd. Climatiseur, procédé de commande d'arrêt et dispositif pour compresseur associé

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100529937B1 (ko) * 2004-01-08 2005-11-22 엘지전자 주식회사 리니어 압축기 및 그 동작방법
GB2547366B (en) 2013-03-11 2017-11-08 Trane Int Inc Controls and operation of variable frequency drives
JP2015081745A (ja) * 2013-10-24 2015-04-27 カルソニックカンセイ株式会社 電動コンプレッサ
JP2023056894A (ja) * 2021-10-08 2023-04-20 パナソニックＩｐマネジメント株式会社 回収装置に接続可能な掃除機

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0731188A (ja) * 1993-07-14 1995-01-31 Ibiden Co Ltd 歯科用研磨装置用のブラシレスモータの回転制御装置
JPH07184394A (ja) * 1993-12-24 1995-07-21 Mitsuba Electric Mfg Co Ltd ブラシレスモータの制御回路
JPH09163791A (ja) * 1995-12-07 1997-06-20 Sanden Corp 電動式圧縮機の駆動方法及び駆動装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0731188A (ja) * 1993-07-14 1995-01-31 Ibiden Co Ltd 歯科用研磨装置用のブラシレスモータの回転制御装置
JPH07184394A (ja) * 1993-12-24 1995-07-21 Mitsuba Electric Mfg Co Ltd ブラシレスモータの制御回路
JPH09163791A (ja) * 1995-12-07 1997-06-20 Sanden Corp 電動式圧縮機の駆動方法及び駆動装置

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013025753A2 (fr) 2011-08-17 2013-02-21 Trane International Inc. Freinage par rotation inverse pour un moteur pm
EP2745395A4 (fr) * 2011-08-17 2016-03-09 Trane Int Inc Freinage par rotation inverse pour un moteur pm
US9525369B2 (en) 2011-08-17 2016-12-20 Trane International Inc. Reverse rotation braking for a PM motor
EP3429047A4 (fr) * 2016-03-09 2019-10-30 GD Midea Air-Conditioning Equipment Co., Ltd. Climatiseur, procédé de commande d'arrêt et dispositif pour compresseur associé
WO2017190917A1 (fr) * 2016-05-02 2017-11-09 Robert Bosch Gmbh Procédé de commande d'un circuit de pompe à chaleur incluant un moteur électrique d'un groupe compresseur, et circuit de pompe à chaleur

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