WO2004031658A1 - Air conditioner - Google Patents

Air conditioner Download PDF

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Publication number
WO2004031658A1
WO2004031658A1 PCT/JP2003/012349 JP0312349W WO2004031658A1 WO 2004031658 A1 WO2004031658 A1 WO 2004031658A1 JP 0312349 W JP0312349 W JP 0312349W WO 2004031658 A1 WO2004031658 A1 WO 2004031658A1
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WO
WIPO (PCT)
Prior art keywords
voltage
power supply
air conditioner
motor drive
drive unit
Prior art date
Application number
PCT/JP2003/012349
Other languages
French (fr)
Japanese (ja)
Inventor
Gento Kobayashi
Hirofumi Noma
Eiji Goto
Akinori Nakamoto
Original Assignee
Matsushita Electric Industrial Co., Ltd.
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 Matsushita Electric Industrial Co., Ltd. filed Critical Matsushita Electric Industrial Co., Ltd.
Publication of WO2004031658A1 publication Critical patent/WO2004031658A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H1/3204—Cooling devices using compression
    • B60H1/3205—Control means therefor
    • B60H1/3208—Vehicle drive related control of the compressor drive means, e.g. for fuel saving purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H2001/3236—Cooling devices information from a variable is obtained
    • B60H2001/3266—Cooling devices information from a variable is obtained related to the operation of the vehicle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/32—Cooling devices
    • B60H2001/3269—Cooling devices output of a control signal
    • B60H2001/327—Cooling devices output of a control signal related to a compressing unit
    • B60H2001/3272—Cooling devices output of a control signal related to a compressing unit to control the revolving speed of a compressor

Definitions

  • the present invention relates to a controller for an outdoor fan motor of an air conditioner.
  • the air conditioner includes a motor drive unit 102 provided with an upper arm switching element 102 a and a lower arm switching element 102 b connected in a three-phase bridge, and a motor 101.
  • Control section 105 with built-in minimum duty ratio detection circuit 105 a and upper arm switching element 102 a s lower arm switching element 1 according to the control signal of control section 105
  • the motor control unit 102c that turns on and off 0b in phase order, the DC converter 111 that converts full-wave rectified commercial power 110 to DC, and the DC converter 111 DC power supply 104 connected to the input side of motor drive section 102 after being converted, smoothing capacitor 104 a used for DC power supply 104, outdoor fan 108, motor drive Outdoor fan connected to the output side of unit 102, motor 108 for driving, and compressor 1 1 4 It is composed of
  • the three-phase brushless motor 101 is a type of DC motor that has three-phase windings of U, V, and W phases and is driven and controlled by a motor drive unit 102 composed of an electronic circuit. Used for required applications.
  • the outdoor fan 108 is accelerated in the forward rotation direction by strong forward wind, so that the rotation speed of the motor 101 is increased, In order to keep this speed constant, the on-duty of the control signal is reduced. Furthermore, even when the on-duty ratio is reduced to the minimum, the minimum duty ratio is detected by the minimum duty ratio detection circuit 105a when the motor 101 exceeds the normal control rotation speed.
  • the upper arm switching element 102a and the lower arm switching element 102b are turned off to suppress the induced voltage generated in the winding 101a. Also, when the rotation speed of the motor 101 falls below a set value lower than the maximum control rotation speed, the motor control returns to the rotation speed control, so that the voltage of the DC power supply unit 104 The breakdown of the upper and lower film switching elements 102a and 102b can be prevented beforehand (for example, see Japanese Patent Application Laid-Open No. 09-36585). However, the air conditioner considers that the rotation speed of the motor 101 will increase due to the normal wind only when the minimum duty ratio detection circuit 105a detects that the on-duty ratio is the minimum. It was obtained.
  • the DC voltage detection unit detects that the DC voltage is higher than or equal to a predetermined voltage, at least one of the upper arm and the lower arm of the motor drive unit is turned off. Air conditioning is provided.
  • FIG. 1 is a configuration diagram of an air conditioner according to Embodiments 1 and 2 of the present invention.
  • FIG. 2 is a configuration diagram of an air conditioner according to Embodiment 3 of the present invention.
  • FIG. 3 is a configuration diagram of an air conditioner according to Embodiment 4 of the present invention.
  • FIG. 4 is a characteristic diagram showing the relationship between the wind speed and the DC voltage in the present invention.
  • FIG. 5 is a characteristic diagram showing the relationship between wind speed and load in the present invention.
  • FIG. 6 is a configuration diagram of an air conditioner in a conventional air conditioner. BEST MODE FOR CARRYING OUT THE INVENTION
  • embodiments of the present invention will be described with reference to the drawings.
  • Embodiment 1 of the present invention will be described with reference to FIGS. 1, 4, and 5.
  • FIG. 1 is a diagrammatic representation of Embodiment 1 of the present invention.
  • the air conditioner includes a motor drive unit 2 having a three-phase bridge-connected upper arm switching element 2a and a lower arm switching element 2b, a control unit 5, and a control unit 5.
  • a motor control unit 2c that turns on and off the upper arm switching element 2a and the lower arm switching element 2b in sequence according to control signals, and a DC converter 1 that rectifies full-wave commercial power 10 and converts it to DC.
  • the horizontal axis represents the wind speed of the forward wind
  • the vertical axis represents the DC voltage that can be generated by the forward wind when the load connected to the DC power supply 4 is approximately 0 W.
  • the relationship is indicated by a straight line 40a.
  • the maximum wind speed in the market is about 30 m / s, and when the wind speed is 30 mZ s, the DC voltage becomes 130 V.
  • the withstand voltage of the smoothing capacitor 4a is 330 V, and when the wind speed is 17 m / s or more, the smoothing capacitor 4a 2003/012349
  • FIG. 5 is a characteristic diagram showing the relationship between the forward wind speed and the load when the DC voltage of the DC power supply 4 becomes 330 V.
  • the horizontal axis represents the forward wind speed, and the vertical axis represents the load.
  • the wind speed is not more than 330 V, which is the withstand voltage of the parts, at the wind speed of 30 m / s.
  • the DC voltage of the DC power supply 4 is equal to or lower than 330 V, and is equal to or higher than 330 V in the lower right region 50e.
  • the load during operation of the compressor 14 is much larger than 10 W.
  • the power consumption due to the load of the DC power supply 4 is approximately 10 W or less because the compressor 14 is stopped.
  • the arm switching element 2 a even if the induced voltage generated in the winding la does not exceed the voltage of the DC power supply 4 Since the lower arm switching element 2b is switched, a path for the regenerative current to charge the smoothing capacitor 4a is formed, and the DC voltage increases.
  • the control unit 5 detects that the DC voltage is equal to or more than 325 V by the DC voltage detection unit 3, the upper arm switching element 2a and the lower arm switching element 2b are all turned off. This stops the boost chopper operation and prevents the DC voltage from rising. J
  • the overvoltage protection is not activated, so that the overvoltage protection is prevented from malfunctioning due to load fluctuations or voltage fluctuations of the commercial power supply.
  • the configuration of the air conditioner according to Embodiment 2 is as shown in FIGS. 1, 4, and 5 as in Embodiment 1.
  • the power consumption due to the load of the DC power supply 4 is reduced because the compressor 14 is stopped.
  • the wind speed is less than W and the wind speed exceeds the wind speed in the direction of accelerating motor 1 and the rotation speed increases, even if the induced voltage generated in winding 1a does not exceed the voltage of DC power supply 4, Since the upper arm switching element 2a and the lower arm switching element 2b are switched, a regenerative current forms a path for charging the smoothing capacitor 4a, and the DC voltage is not increasing.
  • control unit 5 detects that the DC voltage is equal to or more than 3 25 V by the DC voltage detection unit 3, all of the upper arm switching element 2a and the lower arm switching element 2b are turned on. Then, brake operation prevents the DC voltage from rising.
  • the overvoltage protection is not operated, so that the overvoltage protection is prevented from malfunctioning due to a load fluctuation or a voltage fluctuation of the commercial power supply.
  • the configuration of the air conditioner according to Embodiment 3 is as shown in FIGS. 2, 4, and 5. 4 and 5 are the same as in the first embodiment.
  • FIG. 2 shows the configuration of the first and second embodiments, and is controlled on / off by the control unit 5 and connected to the DC voltage supply line 6 of the motor 1 to control the supply of the DC voltage of the motor 1
  • the power consumption due to the load of DC power supply 4 is 10 W or less because compressor 14 is stopped.
  • the upper arm switching element 2 can be used even if the induced voltage generated in the winding 1a does not exceed the DC power supply 4. a, Since the lower arm switching element 2b is switched, a path for the regenerative current to charge the smoothing capacitor 4a is formed, and the DC voltage increases.
  • the overvoltage protection is not operated, so that the overvoltage protection is prevented from malfunctioning due to a load fluctuation or a voltage fluctuation of the commercial power supply.
  • FIG. 3 The configuration of the air conditioner according to Embodiment 4 is as shown in FIGS. 3, 4, and 5.
  • FIG. 1 The configuration of the air conditioner according to Embodiment 4 is as shown in FIGS. 3, 4, and 5.
  • the air conditioner has the configuration of Embodiments 1 and 2
  • the control unit 5 controls the on / off of the DC voltage, and is connected between the positive and negative electrodes of the DC voltage supply line 6 of the motor 1, and includes a resistor 7 a and a switch 7 connected in series.
  • the power consumption due to the load of the DC power supply 4 is approximately 10% because the compressor 14 is stopped. If the wind speed is less than W and the wind speed exceeds the wind speed in the direction of accelerating motor 1 and the rotation speed increases, even if the induced voltage generated in winding 1a does not exceed the voltage of DC power supply 4, Since the upper arm switching element 2a and the lower arm switching element 2b are switched, a path for the regenerative current to charge the smoothing capacitor 4a is formed, and the DC voltage increases.
  • the switch 7 is turned on to form a discharge circuit having a load of 10 W or more. As a result, the DC voltage is prevented from rising by discharging more than the charging of the smoothing capacitor 4a due to normal wind.
  • the overvoltage protection is not operated, so that the overvoltage protection is prevented from malfunctioning due to a load fluctuation or a voltage fluctuation of the commercial power supply.
  • the motor drive unit in which three switching elements are provided on the upper arm and the lower arm connected to the three-phase bridge, respectively, and the switching elements are controlled to turn on and off sequentially.
  • a DC power supply connected to the input side of the motor drive unit; a brushless motor for driving an outdoor fan connected to the output side of the motor drive unit;
  • an air conditioner composed of a compressor and a DC voltage detection unit that detects a voltage of a DC power supply, when the DC voltage detection unit detects that the compressor is stopped and the DC voltage is equal to or higher than a predetermined voltage, The upper and lower arms of the drive unit are all turned off.
  • the present invention provides a method in which when the compressor is stopped and the DC voltage detection unit detects that the DC voltage is equal to or higher than a predetermined voltage, only the upper arm is turned on or the lower arm is turned on. Or to do.
  • the present invention includes a DC power switch that is controlled between ON and OFF by a control unit, is connected between the motor driving unit and the DC power supply, and controls the supply of DC power to the motor driving unit, and the compressor is stopped.
  • a DC power switch that is controlled between ON and OFF by a control unit, is connected between the motor driving unit and the DC power supply, and controls the supply of DC power to the motor driving unit, and the compressor is stopped.
  • the present invention includes a load switching switch that is on / off controlled by a control unit and is connected between a positive electrode and a negative electrode of a DC power supply, and a load resistor that is connected in series with the load switching switch, and the compressor is stopped.
  • the load switching switch When the DC voltage detection unit detects that the DC voltage is equal to or higher than a predetermined voltage, the load switching switch is turned on, and a load resistor is connected between the positive electrode and the negative electrode of the DC power supply.
  • the present invention relates to a control device for an outdoor fan motor of an air conditioner, and can prevent application of overvoltage to circuit components.

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

Abstract

An air conditioner having a DC voltage sensing unit turns all of the upper and lower arms into the off-state when the DC voltage is at a certain value or higher due to the regenerative current caused by a tailwind and operation of the compressor is stopped, thereby preventing application of overvoltage to the components of the circuit.

Description

明 細 書  Specification
空気調和機 技術分野  Air Conditioner Technical Field
本発明は、空気調和機の室外フ ァ ンモータの制御装置に関する。 背景技術  The present invention relates to a controller for an outdoor fan motor of an air conditioner. Background art
従来の技術について、 図 6を用いて説明する。  The conventional technology will be described with reference to FIG.
図 6において、 空気調和機は、 3相ブリ ッジ接続された上アーム スィ ツチング素子 1 0 2 aおよび下アームスイ ッチング素子 1 0 2 bを設けたモータ駆動部 1 0 2 と、 モータ 1 0 1 の速度制御を 行い、 最小デューティ比検出回路 1 0 5 a を内蔵する制御部 1 0 5 と、 制御部 1 0 5 の制御信号によ り 上アームスイ ッチング素子 1 0 2 a s 下アームスイッチング素子 1 0 2 bを相順にオン、 ォ フ制御するモータ制御部 1 0 2 c と、 商用電源 1 1 0を全波整流 し直流に変換する直流変換器 1 1 1 と、 直流変換器 1 1 1 によ り 変換されモータ駆動部 1 0 2 の入力側に接続される直流電源 1 0 4 と、 直流電源 1 0 4に用いられる平滑コンデンサ 1 0 4 a と、 室外フア ン 1 0 8 と、 モータ駆動部 1 0 2 の出力側に接続される 室外ファ ン 1 0 8駆動用のモータ 1 0 1 と、 圧縮機 1 1 4 とによ り構成される。 In FIG. 6, the air conditioner includes a motor drive unit 102 provided with an upper arm switching element 102 a and a lower arm switching element 102 b connected in a three-phase bridge, and a motor 101. Control section 105 with built-in minimum duty ratio detection circuit 105 a and upper arm switching element 102 a s lower arm switching element 1 according to the control signal of control section 105 The motor control unit 102c that turns on and off 0b in phase order, the DC converter 111 that converts full-wave rectified commercial power 110 to DC, and the DC converter 111 DC power supply 104 connected to the input side of motor drive section 102 after being converted, smoothing capacitor 104 a used for DC power supply 104, outdoor fan 108, motor drive Outdoor fan connected to the output side of unit 102, motor 108 for driving, and compressor 1 1 4 It is composed of
3相ブラシレスモータ 1 0 1 は、 U , V， W相の 3相卷線を有 し、 電子回路からなるモータ駆動部 1 0 2によって駆動制御され る直流モータの一種であり、 特に可変速が要求される用途に用い られる。 この 3相ブラシレスモ一夕 1 0 1 を駆動する空気調和機におい て、 室外フアン 1 0 8が強い順風によって正回転方向に加速され ることで、 モー夕 1 0 1 の回転数が増大され、 この回転数を一定 にするため、 制御信号のオンデューティ を絞っていく。 さらに、 オンデューティ比を最小に絞った状態においても、 モータ 1 0 1 が通常の制御回転数を超えたとぎ、 最小デューティ比検出回路 1 0 5 aで、 最小デュ一ティ比が検出されている間、 上アームスィ ツチング素子 1 0 2 aと、 下ァ一ムスイッチング素子 1 0 2 bを オフ状態にすることで、 巻き線 1 0 1 aに発生する誘起電圧を抑 えようとする。 また、 モータ 1 0 1 の回転数が最大の制御回転数 よりも低く設定された値以下に降下すると、 回転数制御に復帰す るので、 強い順風に伴う直流電源部 1 0 4の電圧上昇及び上下ァ 一ムスイッチング素子 1 0 2 a及び 1 0 2 bの破壊を未然に防ぐ ことができる （例えば特開平 0 9 — 2 3 6 8 5号公報参照。）。 しかし、 空気調和機は、 最小デューティ比検出回路 1 0 5 aに おいてオンデューティ比が最小であると検知されている場合のみ モータ 1 0 1 の回転数が順風により増加することを前提として考 えられたものである。 The three-phase brushless motor 101 is a type of DC motor that has three-phase windings of U, V, and W phases and is driven and controlled by a motor drive unit 102 composed of an electronic circuit. Used for required applications. In the air conditioner that drives the three-phase brushless motor 101, the outdoor fan 108 is accelerated in the forward rotation direction by strong forward wind, so that the rotation speed of the motor 101 is increased, In order to keep this speed constant, the on-duty of the control signal is reduced. Furthermore, even when the on-duty ratio is reduced to the minimum, the minimum duty ratio is detected by the minimum duty ratio detection circuit 105a when the motor 101 exceeds the normal control rotation speed. During this time, the upper arm switching element 102a and the lower arm switching element 102b are turned off to suppress the induced voltage generated in the winding 101a. Also, when the rotation speed of the motor 101 falls below a set value lower than the maximum control rotation speed, the motor control returns to the rotation speed control, so that the voltage of the DC power supply unit 104 The breakdown of the upper and lower film switching elements 102a and 102b can be prevented beforehand (for example, see Japanese Patent Application Laid-Open No. 09-36585). However, the air conditioner considers that the rotation speed of the motor 101 will increase due to the normal wind only when the minimum duty ratio detection circuit 105a detects that the on-duty ratio is the minimum. It was obtained.
しかし、 圧縮機 1 1 4が停止し、 モータ 1 0 1が運転されてい る動作モードにおいて、 順風によってモータ 1 0 1 の回転数が増 加した場合、 オンデューティ比が最小でなく、 巻き線 1 0 1 aに 発生する誘起電圧が直流電源 1 0 4の電圧を超えない場合でも、 上アームスイッチング素子 1 0 2 a , 下アームスイッチング素子 1 0 2 bをスイ ッチングしているがために回生電流が平滑コンデ ンサ 1 0 4 aを充電する経路が形成される。 その結果、 昇圧チヨ ッパー動作となり直流電圧が増加し、 回路の構成部品へ耐圧を上 回る過電圧が印加される可能性があった。 発明の開示 However, in the operation mode in which the compressor 114 is stopped and the motor 101 is operating, if the rotation speed of the motor 101 increases due to the forward wind, the on-duty ratio is not the minimum and the winding 1 0 Even when the induced voltage generated at 1a does not exceed the voltage of DC power supply 104, the regenerative current is generated because the upper arm switching element 102a and lower arm switching element 102b are switched. A path for charging the smoothing capacitor 104a is formed. As a result, The DC voltage increased due to the hopper operation, and an overvoltage exceeding the withstand voltage could be applied to the circuit components. Disclosure of the invention
3相ブリッジ接続された上アームおよび下アームにそれぞれ 3 つのスイッチング素子を設けたモータ駆動部と、 スイッチング素 子を相順にオンオフ制御する制御部と、 モータ駆動部の入力側に 接続される直流電源と、 モータ駆動部の出力側に接続される室外 ファン駆動用のブラシレスモータと、 ブラシレスモータにて駆動 される圧縮機と、 直流電源の電圧を検知する直流電圧検知部とを 有し，圧縮機が停止しかつ直流電圧が所定の電圧以上であると直 流電圧検知部が検知したとき、 モータ駆動部の上アームと下ァ一 ムとのうち少なく とも一つをオフ状態にさせることを特徴とする 空気調和が提供される。 図面の簡単な説明  A motor drive unit with three switching elements on each of the upper and lower arms connected in a three-phase bridge, a control unit that controls the switching elements on and off in order, and a DC power supply connected to the input side of the motor drive unit A brushless motor for driving an outdoor fan connected to the output side of the motor drive unit, a compressor driven by the brushless motor, and a DC voltage detection unit for detecting a voltage of a DC power supply. When the DC voltage detection unit detects that the DC voltage is higher than or equal to a predetermined voltage, at least one of the upper arm and the lower arm of the motor drive unit is turned off. Air conditioning is provided. BRIEF DESCRIPTION OF THE FIGURES
図 1は、本発明の実施の形態 1， 2 における空気調和機の構成図 である。  FIG. 1 is a configuration diagram of an air conditioner according to Embodiments 1 and 2 of the present invention.
図 2は、 本発明の実施の形態 3における空気調和機の構成図で ある。  FIG. 2 is a configuration diagram of an air conditioner according to Embodiment 3 of the present invention.
図 3は、 本発明の実施の形態 4における空気調和機の構成図で ある。  FIG. 3 is a configuration diagram of an air conditioner according to Embodiment 4 of the present invention.
図 4は、 本発明における風速と直流電圧の関係を示す特性図で ある。  FIG. 4 is a characteristic diagram showing the relationship between the wind speed and the DC voltage in the present invention.
図 5は、本発明における風速と負荷の関係を示す特性図である。 図 6は、従来の空気調和機における空気調和機の構成図である。 発明を実施するための最良の形態 以下に、 本発明の実施の形態について、 図面を参照しながら説 明する。 FIG. 5 is a characteristic diagram showing the relationship between wind speed and load in the present invention. FIG. 6 is a configuration diagram of an air conditioner in a conventional air conditioner. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(実施の形態 1 )  (Embodiment 1)
図 1、 図 4、 図 5 を用いて本発明の実施の形態 1 について説明 する。  Embodiment 1 of the present invention will be described with reference to FIGS. 1, 4, and 5. FIG.
図 1 において、 空気調和機は、 3相ブリ ッジ接続された上ァー ムスイッチング素子 2 aおよび下アームスイッチング素子 2 bを 設けたモータ駆動部 2 と、 制御部 5 と、 制御部 5 の制御信号によ り上アームスイッチング素子 2 a、 下アームスイ ッチング素子 2 bを相順にオン、 オフ制御するモータ制御部 2 c と、 商用電源 1 0 を全波整流し直流に変換する直流変換器 1 1 と、 直流変換器 1 1 により変換されモータ駆動部 2の入力側に接続される直流電源 4 と、 直流電源 4に用いられる耐圧 3 3 0 Vの平滑コンデンサ 4 a と、 室外ファン 8 と、 モー夕駆動部 2 の出力側に接続される室 外ファン 8駆動用のモ一夕 1 と、 圧縮機 1 4と、 直流電源 4の電 圧を検出する直流電圧検出部 3 とにより構成される。  In FIG. 1, the air conditioner includes a motor drive unit 2 having a three-phase bridge-connected upper arm switching element 2a and a lower arm switching element 2b, a control unit 5, and a control unit 5. A motor control unit 2c that turns on and off the upper arm switching element 2a and the lower arm switching element 2b in sequence according to control signals, and a DC converter 1 that rectifies full-wave commercial power 10 and converts it to DC. 1, a DC power supply 4 converted by the DC converter 1 1 and connected to the input side of the motor drive unit 2, a smoothing capacitor 4a having a withstand voltage of 3 V used for the DC power supply 4, and an outdoor fan 8, It is composed of a motor 1 for driving an outdoor fan 8 connected to the output side of the motor drive unit 2, a compressor 14 and a DC voltage detection unit 3 for detecting the voltage of the DC power supply 4. .
図 4は、 横軸は順風の風速、 縦軸は直流電源 4に接続される負 荷が略 0 Wのとき順風によって発生し得る直流電圧であり、 その 関係を直線 4 0 aで示す。  In FIG. 4, the horizontal axis represents the wind speed of the forward wind, and the vertical axis represents the DC voltage that can be generated by the forward wind when the load connected to the DC power supply 4 is approximately 0 W. The relationship is indicated by a straight line 40a.
市場における最大風速は、 3 0 m / s 程度であり、 風速 3 0 m Z s 時に直流電圧は 1 3 0 0 Vとなる。 平滑コンデンサ 4 aの耐 圧は 3 3 0 Vであり、 風速 1 7 m / s 以上で平滑コンデンサ 4 a 2003/012349 The maximum wind speed in the market is about 30 m / s, and when the wind speed is 30 mZ s, the DC voltage becomes 130 V. The withstand voltage of the smoothing capacitor 4a is 330 V, and when the wind speed is 17 m / s or more, the smoothing capacitor 4a 2003/012349
5 の耐圧を超える。  Exceeds 5 withstand pressure.
図 5は、 直流電源 4の直流電圧が 3 3 0 Vとなるときの順風の 風速と、 負荷との関係を示す特性図であり、 横軸は順風の風速、 縦軸は負荷である。  FIG. 5 is a characteristic diagram showing the relationship between the forward wind speed and the load when the DC voltage of the DC power supply 4 becomes 330 V. The horizontal axis represents the forward wind speed, and the vertical axis represents the load.
風速 3 0 m/s にて負荷が 1 0 Wのときに、 直流電源 4の直流 電圧が 3 3 0 Vとなる。  When the wind speed is 30 m / s and the load is 10 W, the DC voltage of the DC power supply 4 becomes 330 V.
つまり、 1 0 Wより大きい負荷の場合には、 風速 3 0 m/s に. て、 部品の耐圧である 3 3 0 Vを超えることはない。  In other words, when the load is larger than 10 W, the wind speed is not more than 330 V, which is the withstand voltage of the parts, at the wind speed of 30 m / s.
直線 5 0 aよりも左上側の領域 5 0 dでは、 直流電源 4の直流 電圧は 3 3 0 V以下で、 右下側の領域 5 0 eで 3 3 0 V以上とな る。  In the region 50d on the upper left side of the straight line 50a, the DC voltage of the DC power supply 4 is equal to or lower than 330 V, and is equal to or higher than 330 V in the lower right region 50e.
なお、 圧縮機 1 4の運転時における負荷は 1 0 Wよりもはるか に大きい。  The load during operation of the compressor 14 is much larger than 10 W.
図 1 のように構成された空気調和機のモータ 1が運転されてい る動作モードにおいて、 直流電源 4の負荷による消費電力が、 圧 縮機 1 4が停止しているため略 1 0 W以下であり、 ある風速以上 の順風が発生し、 モータ 1 の回転数が増加した場合、 巻線 l aに 発生する誘起電圧が直流電源 4の電圧を超えない場合でも、 上ァ —ムスイッチング素子 2 a , 下アームスイッチング素子 2 bをス イ ッチングしているがために回生電流が平滑コンデンサ 4 aを充 電する経路を形成し、 直流電圧が増加する。  In the operation mode in which the motor 1 of the air conditioner configured as shown in Fig. 1 is operating, the power consumption due to the load of the DC power supply 4 is approximately 10 W or less because the compressor 14 is stopped. Yes, if a forward wind at a certain wind speed or more is generated and the number of revolutions of the motor 1 increases, the arm switching element 2 a, even if the induced voltage generated in the winding la does not exceed the voltage of the DC power supply 4 Since the lower arm switching element 2b is switched, a path for the regenerative current to charge the smoothing capacitor 4a is formed, and the DC voltage increases.
このとき、 制御部 5が直流電圧検出部 3で直流電圧が 3 2 5 V 以上であると検出した場合、 上アームスイ ッチング素子 2 a、 お よび、 下アームスイ ッチング素子 2 bを全てオフ状態にすること で、 昇圧チョ ッパー動作を停止し、 直流電圧の上昇を防止する。 J At this time, if the control unit 5 detects that the DC voltage is equal to or more than 325 V by the DC voltage detection unit 3, the upper arm switching element 2a and the lower arm switching element 2b are all turned off. This stops the boost chopper operation and prevents the DC voltage from rising. J
6 なお、 圧縮機 1 4が運転中の場合には、 過電圧保護を動作させ ないため、 負荷変動や商用電源の電圧変動等により過電圧保護が 誤動作することを防止している。  6 When the compressor 14 is in operation, the overvoltage protection is not activated, so that the overvoltage protection is prevented from malfunctioning due to load fluctuations or voltage fluctuations of the commercial power supply.
(実施の形態 2 )  (Embodiment 2)
実施の形態 2における空気調和機の構成は、 実施の形態 1 と同 様に図 1、 図 4、 図 5 の通りである。  The configuration of the air conditioner according to Embodiment 2 is as shown in FIGS. 1, 4, and 5 as in Embodiment 1.
実施の形態 1のように構成された空気調和機のモ一タ 1が運転 されている動作モードにおいて、 直流電源 4の負荷による消費電 力が、 圧縮機 1 4が停止しているため 1 0 W以下であり、 モー夕 1 を加速する方向にある風速以上の順風が発生し回転数が増加し た場合、 巻線 1 aに発生する誘起電圧が直流電源 4の電圧を超え ない場合でも、 上アームスイッチング素子 2 a， 下ァ一ムスイツ チング素子 2 bをスィ ツチングしているがために、 回生電流が平 滑コンデンサ 4 aを充電する経路を形成し、 直流電圧が増加して い <。  In the operation mode in which the motor 1 of the air conditioner configured as in Embodiment 1 is operating, the power consumption due to the load of the DC power supply 4 is reduced because the compressor 14 is stopped. When the wind speed is less than W and the wind speed exceeds the wind speed in the direction of accelerating motor 1 and the rotation speed increases, even if the induced voltage generated in winding 1a does not exceed the voltage of DC power supply 4, Since the upper arm switching element 2a and the lower arm switching element 2b are switched, a regenerative current forms a path for charging the smoothing capacitor 4a, and the DC voltage is not increasing.
このとき、 制御部 5が直流電圧検出部 3で直流電圧を 3 2 5 V 以上であると検出した場合、 上アームスイッチング素子 2 a、 お よび、 下アームスイッチング素子 2 bのいずれかを全てオンし、 ブレーキ動作させることで、 直流電圧の上昇を防止する。  At this time, if the control unit 5 detects that the DC voltage is equal to or more than 3 25 V by the DC voltage detection unit 3, all of the upper arm switching element 2a and the lower arm switching element 2b are turned on. Then, brake operation prevents the DC voltage from rising.
なお、 圧縮機 1 4が運転中の場合には、 過電圧保護を動作させ ないため、 負荷変動や商用電源の電圧変動等により過電圧保護が 誤動作することを防止している。  In addition, when the compressor 14 is operating, the overvoltage protection is not operated, so that the overvoltage protection is prevented from malfunctioning due to a load fluctuation or a voltage fluctuation of the commercial power supply.
(実施の形態 3 )  (Embodiment 3)
実施の形態 3 における空気調和機の構成は、 図 2、 図 4、 図 5 の通りである。 また、 図 4、 図 5は実施の形態 1 と同様である。 The configuration of the air conditioner according to Embodiment 3 is as shown in FIGS. 2, 4, and 5. 4 and 5 are the same as in the first embodiment.
図 2は、 実施の形態 1 , 2 における構成に加え、 制御部 5 によつ てオンオフ制御され、 モー夕 1 の直流電圧供給ライン 6 に接続さ れ、 モータ 1 の直流電圧の供給をコントロールするスィッチ 6 a とで構成される空気調和機の構成図である。  FIG. 2 shows the configuration of the first and second embodiments, and is controlled on / off by the control unit 5 and connected to the DC voltage supply line 6 of the motor 1 to control the supply of the DC voltage of the motor 1 It is a block diagram of the air conditioner comprised with switch 6a.
図 2のように構成される空気調和器において、 モー夕 1が運転 されている動作モードにおいて、 直流電源 4の負荷による消費電 力が、 圧縮機 1 4が停止しているため 1 0 W以下であり、 モータ 1 を加速する方向にある風速以上の順風が発生し回転数が増加し た場合、 巻き線 1 aに発生する誘起電圧が直流電源 4の超えない 場合でも、 上アームスイ ッチング素子 2 a， 下アームスィ ッチン グ素子 2 bをスイッチングしているがために、 回生電流が平滑コ ンデンサ 4 aを充電する経路を形成し、直流電圧が増加していく。  In the air conditioner configured as shown in Fig. 2, in the operation mode where motor 1 is operating, the power consumption due to the load of DC power supply 4 is 10 W or less because compressor 14 is stopped. When the wind speed exceeds the wind speed in the direction of accelerating the motor 1 and the number of rotations increases, the upper arm switching element 2 can be used even if the induced voltage generated in the winding 1a does not exceed the DC power supply 4. a, Since the lower arm switching element 2b is switched, a path for the regenerative current to charge the smoothing capacitor 4a is formed, and the DC voltage increases.
このとき、 制御部 5が直流電圧検出部 3で直流電圧を 3 2 5 V 以上であると検出した場合、スィッチ 6 aを遮断することにより、 平滑コンデンサ 4 aを充電する経路をなく し、 直流電圧の上昇を 防止する。  At this time, when the control unit 5 detects that the DC voltage is equal to or higher than 3 25 V by the DC voltage detection unit 3, the switch 6 a is shut off, thereby eliminating a path for charging the smoothing capacitor 4 a, and Prevent voltage rise.
なお、 圧縮機 1 4が運転中の場合には、 過電圧保護を動作させ ないため、 負荷変動や商用電源の電圧変動等により過電圧保護が 誤動作することを防止している。  In addition, when the compressor 14 is operating, the overvoltage protection is not operated, so that the overvoltage protection is prevented from malfunctioning due to a load fluctuation or a voltage fluctuation of the commercial power supply.
(実施の形態 4 )  (Embodiment 4)
実施の形態 4における空気調和機の構成は、 図 3 、 図 4、 図 5 の通りである。  The configuration of the air conditioner according to Embodiment 4 is as shown in FIGS. 3, 4, and 5. FIG.
また、 図 4、 図 5は実施の形態 1 と同様である。  4 and 5 are the same as in the first embodiment.
図 3 において、 空気調和機は、 実施の形態 1 , 2の構成に加え、 制御部 5 によってオンオフ制御され、 モータ 1の直流電圧供給ラ イン 6の正極と負極間に接続され、 抵抗 7 aと直列に接続された スィッチ 7 とで構成される。 In FIG. 3, the air conditioner has the configuration of Embodiments 1 and 2, The control unit 5 controls the on / off of the DC voltage, and is connected between the positive and negative electrodes of the DC voltage supply line 6 of the motor 1, and includes a resistor 7 a and a switch 7 connected in series.
図 3のように構成される空気調和器において、 モ一夕 1が運転 されている動作モードにおいて、 直流電源 4の負荷による消費電 力が、 圧縮機 1 4が停止しているため略 1 0 W以下であり、 モー 夕 1 を加速する方向にある風速以上の順風が発生し回転数が増加 した場合、 巻線 1 aに発生する誘起電圧が直流電源 4の電圧を超 えない場合でも、 上アームスイ ッチング素子 2 a , 下アームスィ ツチング素子 2 bをスイッチングしているがために、 回生電流が 平滑コンデンサ 4 aを充電する経路を形成し、 直流電圧が増加し ていく。  In the air conditioner configured as shown in Fig. 3, in the operation mode where the motor 1 is operating, the power consumption due to the load of the DC power supply 4 is approximately 10% because the compressor 14 is stopped. If the wind speed is less than W and the wind speed exceeds the wind speed in the direction of accelerating motor 1 and the rotation speed increases, even if the induced voltage generated in winding 1a does not exceed the voltage of DC power supply 4, Since the upper arm switching element 2a and the lower arm switching element 2b are switched, a path for the regenerative current to charge the smoothing capacitor 4a is formed, and the DC voltage increases.
このとき、 制御部 5が直流電圧検出部 3で直流電圧を 3 2 5 V 以上であると検出した場合のみ、 スィッチ 7をオンし、 1 0 W以 上の負荷を持つ放電回路を形成することにより、 順風による平滑 コンデンサ 4 aへの充電以上の放電を行う ことで、 直流電圧の上 昇を防止する。  At this time, only when the control unit 5 detects that the DC voltage is equal to or more than 325 V by the DC voltage detection unit 3, the switch 7 is turned on to form a discharge circuit having a load of 10 W or more. As a result, the DC voltage is prevented from rising by discharging more than the charging of the smoothing capacitor 4a due to normal wind.
なお、 圧縮機 1 4が運転中の場合には、 過電圧保護を動作させ ないため、 負荷変動や商用電源の電圧変動等により過電圧保護が 誤動作することを防止している。  In addition, when the compressor 14 is operating, the overvoltage protection is not operated, so that the overvoltage protection is prevented from malfunctioning due to a load fluctuation or a voltage fluctuation of the commercial power supply.
以上のように本発明は、 3相ブリ ッジ接続された上アームおよ び下ァームにそれぞれ 3つのスイ ッチング素子を設けたモー夕駆 動部と、 スィ ツチング素子を相順にオン、 オフ制御する制御部と、 モータ駆動部の入力側に接続される直流電源と、 モータ駆動部の 出力側に接続される室外ファン駆動用のブラシレスモータと、 圧 縮機と、 直流電源の電圧を検知する直流電圧検知部とにより構成 される空気調和機において、 圧縮機が停止しかつ直流電圧が所定 の電圧以上であると直流電圧検知部が検知したとき、 モ一夕駆動 部の上下アームを全てオフ状態にさせるものである。 As described above, according to the present invention, the motor drive unit in which three switching elements are provided on the upper arm and the lower arm connected to the three-phase bridge, respectively, and the switching elements are controlled to turn on and off sequentially. A DC power supply connected to the input side of the motor drive unit; a brushless motor for driving an outdoor fan connected to the output side of the motor drive unit; In an air conditioner composed of a compressor and a DC voltage detection unit that detects a voltage of a DC power supply, when the DC voltage detection unit detects that the compressor is stopped and the DC voltage is equal to or higher than a predetermined voltage, The upper and lower arms of the drive unit are all turned off.
また、 本発明は、 圧縮機が停止しかつ直流電圧が所定の電圧以 上であると直流電圧検知部が検知したとき、 上アームのみ全てォ ン状態もしく は下アームのみ全てオン状態のいずれかを行う もの である。  In addition, the present invention provides a method in which when the compressor is stopped and the DC voltage detection unit detects that the DC voltage is equal to or higher than a predetermined voltage, only the upper arm is turned on or the lower arm is turned on. Or to do.
また、 本発明は、 制御部によってオンオフ制御され、 モータ駆 動部と直流電源との間に接続され、 モータ駆動部の直流電源の供 給をコントロールする直流電源スィッチを有し、 圧縮機が停止し かつ直流電圧が所定の電圧以上であると直流電圧検知部が検知し たとき、 直流電源スィッチをオフし、 モ一夕駆動部の電源を遮断 するものである。  Further, the present invention includes a DC power switch that is controlled between ON and OFF by a control unit, is connected between the motor driving unit and the DC power supply, and controls the supply of DC power to the motor driving unit, and the compressor is stopped. When the DC voltage detection unit detects that the DC voltage is equal to or higher than a predetermined voltage, the DC power switch is turned off and the power supply of the motor drive unit is cut off.
また、 本発明は、 制御部によってオンオフ制御され、 直流電源 の正極と負極間に接続される負荷切替えスィッチと、 負荷切替え スィッチと直列に接続される負荷抵抗とを具備し、 圧縮機が停止 しかつ直流電圧が所定の電圧以上であると直流電圧検知部が検知 したとき、 負荷切り替えスィッチをオンし、 直流電源の正極と負 極間に負荷抵抗を接続するものである。  Further, the present invention includes a load switching switch that is on / off controlled by a control unit and is connected between a positive electrode and a negative electrode of a DC power supply, and a load resistor that is connected in series with the load switching switch, and the compressor is stopped. When the DC voltage detection unit detects that the DC voltage is equal to or higher than a predetermined voltage, the load switching switch is turned on, and a load resistor is connected between the positive electrode and the negative electrode of the DC power supply.
この構成をなすことで、直流電圧の上昇を防止することができ、 構成部品への過電圧の印加による破壊を防止することができる。  With this configuration, an increase in the DC voltage can be prevented, and destruction due to application of an overvoltage to the components can be prevented.
なお、 圧縮機が運転中の場合には、 過電圧保護を動作させない ため、 負荷変動や商用電源の電圧変動等により過電圧保護が誤動 作することを防止している。 産業上の利用可能性 When the compressor is running, the overvoltage protection is not activated, preventing the overvoltage protection from malfunctioning due to load fluctuations or fluctuations in the voltage of the commercial power supply. Industrial applicability
本発明は、 空気調和機の室外ファンモー夕の制御装置に関する もので、 回路の構成部品への過電圧の印加を防止できる。  The present invention relates to a control device for an outdoor fan motor of an air conditioner, and can prevent application of overvoltage to circuit components.

Claims

請求の範囲 The scope of the claims
1 . 3相プリ ッジ接続された上アームおよび下アームにそれぞ れ 3つのスイ ッチング素子を設けたモ一夕駆動部と、  1. A motor drive unit provided with three switching elements on each of the upper and lower arms connected to a three-phase bridge,
前記スイッチング素子を相順にオンオフ制御する制御部と、 前記モータ駆動部の入力側に接続される直流電源と、 A control unit that performs on-off control of the switching elements in order, a DC power supply connected to an input side of the motor drive unit,
前記モー夕駆動部の出力側に接続される室外ファン駆動用のブラ シレスモ一夕と、 A brushless motor for driving an outdoor fan connected to the output side of the motor drive unit,
ブラシレスモー夕にて駆動される圧縮機と、 A compressor driven by a brushless motor,
前記直流電源の電圧を検知する直流電圧検知部とを有し， 前記圧縮機が停止しかつ前記直流電圧が所定の電圧以上であると 前記直流電圧検知部が検知したとき、 前記モータ駆動部の前記上 アームと前記下アームとのうち少なく とも一つをオフ状態にさせ ることを特徴とする空気調和機。 A DC voltage detector for detecting a voltage of the DC power supply, wherein the compressor is stopped and the DC voltage detector detects that the DC voltage is equal to or higher than a predetermined voltage; An air conditioner, wherein at least one of the upper arm and the lower arm is turned off.
2 . 前記制御部によってオンオフ制御され、 前記モータ駆動部 と前記直流電源との間に接続され、 前記モータ駆動部の前記直流 電源の供給をコントロールする直流電源スィッチを更に有し、 前記圧縮機が停止しかつ直流電圧が所定の電圧以上であると前記 直流電圧検知部が検知したとき、前記直流電源スィツチをオフし、 前記モータ駆動部の電源を遮断することを特徴とする請求項 1 に 記載の空気調和機。 ， 2. The compressor further includes a DC power switch that is on / off controlled by the control unit, is connected between the motor drive unit and the DC power supply, and controls supply of the DC power to the motor drive unit. 2. The motor drive unit according to claim 1, wherein when the DC voltage detection unit detects that the DC voltage is stopped and the DC voltage is equal to or higher than a predetermined voltage, the DC power switch is turned off and the power supply of the motor drive unit is cut off. Air conditioner. ,
3 . 前記制御部によってオンオフ制御され、 前記直流電源の正 極と負極間に接続される負荷切替えスィッチと、 前記負荷切替え スィッチと直列に放電回路とを更に有し、 3. It further includes a load switching switch that is on / off controlled by the control unit and connected between a positive electrode and a negative electrode of the DC power supply, and a discharge circuit in series with the load switching switch.
前記圧縮機が停止しかつ直流電圧が所定の電圧以上であると前記 直流電圧検知部が検知したとき、 前記負荷切り替えスィッチをォ ンし、 前記直流電源の正極と負極間に前記放電回路を接続するこ とを特徴とする請求項 1 に記載の空気調和機。 When the DC voltage detection unit detects that the compressor is stopped and the DC voltage is equal to or higher than a predetermined voltage, the load switching switch is turned off. The air conditioner according to claim 1, wherein the discharge circuit is connected between a positive electrode and a negative electrode of the DC power supply.
4 . 前記放電回路が負荷抵抗であることを特徴とする請求項 3 に 記載の空気調和機。 4. The air conditioner according to claim 3, wherein the discharge circuit is a load resistance.
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Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101517880B (en) * 2006-09-22 2011-12-07 松下电器产业株式会社 Air conditioning apparatus
JP2011176898A (en) 2008-06-19 2011-09-08 Panasonic Corp Motor control apparatus
KR101490185B1 (en) * 2008-12-17 2015-02-11 엘지전자 주식회사 Apparatus and method for initially driving a sensorless bldc motor
JP5382147B2 (en) * 2010-02-10 2014-01-08 パナソニック株式会社 Brushless motor driving device, brushless motor and air conditioner
JP2012249397A (en) * 2011-05-27 2012-12-13 Hitachi Appliances Inc Motor control device and air conditioner using the same
JP6394030B2 (en) * 2014-03-31 2018-09-26 アイシン・エィ・ダブリュ株式会社 Inverter control device
CN106165277B (en) * 2014-03-31 2018-10-23 爱信艾达株式会社 Control device for inverter
CN105871270B (en) * 2016-05-06 2018-07-27 浙江东方机电有限公司 A kind of method and device differentiating permanent magnet synchronous motor three-phase windings phase sequence
CN109792162B (en) * 2016-10-18 2023-05-16 株式会社富士 Non-contact power supply device
CN106953562B (en) * 2017-03-16 2019-03-19 珠海格力电器股份有限公司 direct current motor and control method
CN108332390B (en) * 2017-12-19 2020-02-04 青岛海尔空调器有限总公司 Air conditioner control method and air conditioner
JP7030850B2 (en) * 2018-01-11 2022-03-07 三菱電機株式会社 Air conditioner

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06253585A (en) * 1993-02-25 1994-09-09 Nippondenso Co Ltd Abnormality detector for brushless motor
JPH0923685A (en) * 1995-07-04 1997-01-21 Toshiba Corp Air conditioner
JPH10117490A (en) * 1996-10-14 1998-05-06 Daikin Ind Ltd Brushless motor
JPH11299280A (en) * 1998-04-07 1999-10-29 Takaoka Electric Mfg Co Ltd Motor controller

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06253585A (en) * 1993-02-25 1994-09-09 Nippondenso Co Ltd Abnormality detector for brushless motor
JPH0923685A (en) * 1995-07-04 1997-01-21 Toshiba Corp Air conditioner
JPH10117490A (en) * 1996-10-14 1998-05-06 Daikin Ind Ltd Brushless motor
JPH11299280A (en) * 1998-04-07 1999-10-29 Takaoka Electric Mfg Co Ltd Motor controller

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CN1492198A (en) 2004-04-28

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