WO2011151906A1 - Appareil inverseur - Google Patents

Appareil inverseur Download PDF

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Publication number
WO2011151906A1
WO2011151906A1 PCT/JP2010/059391 JP2010059391W WO2011151906A1 WO 2011151906 A1 WO2011151906 A1 WO 2011151906A1 JP 2010059391 W JP2010059391 W JP 2010059391W WO 2011151906 A1 WO2011151906 A1 WO 2011151906A1
Authority
WO
WIPO (PCT)
Prior art keywords
inrush current
film capacitor
current suppression
temperature
converter unit
Prior art date
Application number
PCT/JP2010/059391
Other languages
English (en)
Japanese (ja)
Inventor
勇樹 河内
昌則 加藤
Original Assignee
三菱電機株式会社
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 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2010/059391 priority Critical patent/WO2011151906A1/fr
Priority to TW099126442A priority patent/TWI426688B/zh
Publication of WO2011151906A1 publication Critical patent/WO2011151906A1/fr

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    • 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
    • H02H7/10—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 converters; for rectifiers
    • H02H7/12—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 converters; for rectifiers for static converters or rectifiers
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
    • H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature

Definitions

  • the present invention relates to an inverter device, and more particularly to an inverter device using a film capacitor as a smoothing capacitor.
  • a smoothing capacitor that smoothes a ripple component that appears in a DC bus current is connected between the DC buses.
  • a large-capacity electrolytic capacitor is used as the smoothing capacitor, harmonic components in the DC bus current increase. Therefore, an inverter device using a small-capacity film capacitor as a smoothing capacitor is known for the purpose of suppressing the harmonic component.
  • the film capacitor when a film capacitor is used as the smoothing capacitor connected between the DC buses of the inverter device, the film capacitor has a characteristic that the internal resistance increases with the progress of deterioration due to overvoltage or aging. Heating burnout damage occurs due to increasing internal resistance. Therefore, an inverter device using a film capacitor as a smoothing capacitor requires a circuit that protects the film capacitor from heat burnout damage due to deterioration.
  • Patent Document 1 proposes a method in which the temperature of a film capacitor is detected by a thermistor to determine deterioration and the output operation of the inverter device is stopped.
  • simply stopping the output operation of the inverter device does not protect the film capacitor because the converter output current always flows through the film capacitor.
  • Patent Document 2 proposes a method in which the temperature of a film capacitor is detected by a thermistor to determine deterioration, and the inverter device is disconnected from the AC power supply.
  • the method of providing an open / close switch on the power input side of the inverter device requires a separate control circuit, resulting in an increase in cost.
  • an overvoltage protection circuit for detecting an overvoltage of the DC bus is provided, and a switch is provided in parallel with the film capacitor.
  • the switch is closed to connect the Short circuit protects film capacitor.
  • an inrush current suppression resistor is overloaded (burned out) by a flowing inrush current to interrupt the converter and the film capacitor.
  • the present invention has been made in view of the above, and an object of the present invention is to provide an inverter device including a protection circuit that can reliably avoid heat burnout damage due to deterioration of a film capacitor used in a smoothing capacitor with an inexpensive configuration.
  • the present invention is a converter unit that converts an AC power source into a DC power source, and an inrush current suppression circuit in which an inrush current suppression relay and an inrush current suppression resistor are connected in parallel.
  • An inrush current suppression circuit having one end connected to the positive output end of the converter unit, a positive bus connected to the other end of the inrush current suppression circuit, and a negative bus connected to the negative output end of the converter unit
  • an inverter device comprising a film capacitor that is a smoothing capacitor connected in between, a temperature detection means for detecting the temperature of the film capacitor, and a detection temperature and a determination temperature output by the temperature detection means are compared, While the detected temperature is lower than the judgment temperature, the inrush current suppression relay is turned on. When the detected temperature exceeds the judgment temperature, the inrush current suppression relay is turned off. And a controlling means for controlling.
  • the temperature that has increased due to the deterioration of the film capacitor is determined as the determination temperature. Becomes higher, the current path is switched to a path via the inrush current suppression resistor. As a result, the inrush current suppression resistor is disconnected by Joule heat, the output current of the converter unit is blocked from flowing into the film capacitor, and the film capacitor is protected from heat burnout damage due to deterioration.
  • FIG. 1 is a block diagram showing a configuration of an inverter device according to an embodiment of the present invention.
  • FIG. 2 is a diagram for explaining the positional relationship between a film capacitor, which is a smoothing capacitor, and a thermistor.
  • FIG. 3 is a diagram illustrating the converter output current path when the inrush current suppression relay is on.
  • FIG. 4 is a diagram illustrating the converter output current path when the inrush current suppression relay is off.
  • FIG. 1 is a block diagram showing a configuration of an inverter device according to an embodiment of the present invention.
  • an inverter device 1 includes a thermistor in a general inverter device including a converter unit 11, an inrush current suppression circuit 12, a smoothing capacitor 13 formed of a film capacitor, a main circuit unit 14, and a control unit 15. 16 is added, and the function of protecting the smoothing capacitor (film capacitor) 13 is added to the control unit 15.
  • the smoothing capacitor 13 is referred to as a film capacitor 13.
  • the converter unit 11 is configured by a diode bridge, and converts the three-phase AC power source 2 into DC power.
  • the positive output terminal of the converter unit 11 is connected to one end of the inrush current suppression circuit 12, and the negative output terminal of the converter unit 11 is directly connected to the negative input terminal of the main circuit unit 14.
  • the inrush current suppression circuit 12 includes an inrush current suppression resistor 12a and an inrush current suppression relay 12b connected in parallel.
  • the inrush current suppression relay 12 b is on / off controlled by the control unit 15.
  • the other end of the inrush current suppression circuit 12 is connected to the positive input terminal of the main circuit unit 14.
  • the film capacitor 13 has one end connected to the positive bus connecting the other end of the inrush current suppression circuit 12 and the positive input end of the main circuit unit 14, and the other end connected to the negative output end of the converter unit 11 and the main circuit unit 14.
  • the output power of the converter unit 11 is smoothed by being connected to the negative electrode bus that connects the negative input terminal.
  • the main circuit unit 14 includes a switching circuit having a switching element in which flywheel diodes are connected in antiparallel, and switches the charging voltage (DC power supply) of the film capacitor 13 with a PWM drive signal supplied from the control unit 15 to induce the circuit. Conversion to AC power for driving the electric motor 3 is performed.
  • the thermistor 16 which is an example of the temperature detecting means is disposed in the vicinity of the film capacitor 13, and the temperature information of the film capacitor 13 detected by the thermistor 16 is input to the control unit 15.
  • the control unit 15 is added with a function of control means for performing on / off control of the inrush current suppression relay 12b based on the temperature detected by the thermistor 16. That is, the control unit 15 performs on / off control of the inrush current suppression relay 12b based on another parameter such as the magnitude of the inrush current in the general configuration described above.
  • FIG. 2 is a diagram for explaining the positional relationship between a film capacitor, which is a smoothing capacitor, and a thermistor.
  • the thermistor 16 is disposed in the vicinity of the film capacitor 13. Specifically, the thermistor 16 is bonded to the film capacitor 13 by a bonding material 17 as shown in FIG. As a result, the thermistor 16 can accurately detect the outer peripheral surface temperature of the film capacitor 13.
  • FIG. 3 is a diagram illustrating the converter output current path when the inrush current suppression relay is on.
  • FIG. 4 is a diagram illustrating the converter output current path when the inrush current suppression relay is off.
  • the control unit 15 turns off the inrush current suppression relay 12b.
  • the output current of the converter unit 11 flows through a path 21 extending from the positive output terminal of the converter unit 11 to the inrush current suppression resistor 12a ⁇ the film capacitor 13 ⁇ the negative output terminal of the converter unit 11, as shown in FIG. .
  • the input current when the three-phase AC power supply 2 is turned on is suppressed by the inrush current suppressing resistor 12a.
  • the controller 15 immediately turns on the inrush current suppression relay 12b when the inrush current becomes a predetermined value or less. And the control part 15 compares the temperature information of the film capacitor
  • the film capacitor 13 is performing a desired smoothing operation.
  • the film capacitor 13 is changed according to the number of times the three-phase AC power supply 2 is turned on and off and the length of the operation time of the inverter device 1. Deterioration that becomes a problem progresses and internal resistance increases. As the internal resistance increases, the temperature of the film capacitor 13 increases, so that the detection temperature of the thermistor 16 increases.
  • the control unit 15 When the detected temperature from the thermistor 16 exceeds the determination temperature, the control unit 15 immediately turns off the inrush current suppression relay 12b. As a result, the output current of the converter unit 11 flows through a path 21 extending from the positive output terminal of the converter unit 11 to the inrush current suppression resistor 12a ⁇ the film capacitor 13 ⁇ the negative output terminal of the converter unit 11, as shown in FIG. .
  • the control unit 15 continues to turn off the inrush current suppression relay 12b, the output current of the converter unit 11 continues to flow through the inrush current suppression resistor 12a.
  • the inrush current suppression resistor 12a is melted (overloaded disconnection) by Joule heat, and the output current of the converter unit 11 is blocked from flowing into the film capacitor 13.
  • the main circuit 14 is disconnected from the converter unit 11 and stops the output operation to the induction motor 3.
  • an inverter device can be obtained by simply adding a thermistor for detecting the temperature of the film capacitor to the protection circuit capable of avoiding heat burnout damage due to deterioration of the film capacitor used in the smoothing capacitor.
  • the control unit and the inrush current suppression circuit that are installed from the beginning can be easily realized with an inexpensive configuration.
  • the inrush current suppression resistor can be selected to have a small resistance value that is easy to cause overload disconnection.
  • the inverter device according to the present invention is useful as an inverter device that can reliably avoid heat burnout damage due to deterioration of a film capacitor used for a smoothing capacitor with an inexpensive configuration.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

L'invention concerne un appareil inverseur conçu de telle manière que lorsque l'inverseur fonctionne, un trajet de courant par lequel le courant de sortie d'une unité de conversion (11) s'écoule dans un condensateur à film (13) est formé de manière à traverser un relais (12b) restreignant le courant d'appel. Si la détérioration du condensateur à film (13) progresse et si sa température dépasse une température d'évaluation, le trajet de courant est commuté sur un trajet traversant une résistance (12a) restreignant le courant d'appel. En conséquence, la résistance (12a) restreignant le courant d'appel se rompra sous l'effet de la chaleur de Joule et le courant de sortie de l'unité d'inversion (11) sera coupé et ne s'écoulera pas dans le condensateur à film (13). Le condensateur à film (13) est ainsi protégé contre un endommagement par brûlage lié à la génération de chaleur causée par sa détérioration.
PCT/JP2010/059391 2010-06-02 2010-06-02 Appareil inverseur WO2011151906A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2010/059391 WO2011151906A1 (fr) 2010-06-02 2010-06-02 Appareil inverseur
TW099126442A TWI426688B (zh) 2010-06-02 2010-08-09 反向器

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2010/059391 WO2011151906A1 (fr) 2010-06-02 2010-06-02 Appareil inverseur

Publications (1)

Publication Number Publication Date
WO2011151906A1 true WO2011151906A1 (fr) 2011-12-08

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ID=45066303

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2010/059391 WO2011151906A1 (fr) 2010-06-02 2010-06-02 Appareil inverseur

Country Status (2)

Country Link
TW (1) TWI426688B (fr)
WO (1) WO2011151906A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102789307A (zh) * 2012-06-29 2012-11-21 浪潮电子信息产业股份有限公司 一种抑制大功率风扇瞬间冲击电流的节能设计方法及装置
CN105827103A (zh) * 2015-01-05 2016-08-03 华为技术有限公司 一种预防冲击电流的电路和供电电源
CN107565803A (zh) * 2017-09-20 2018-01-09 中国电子科技集团公司第四十三研究所 超大容量输入储能电容的浪涌电流抑制电路及抑制方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008061476A (ja) * 2006-09-04 2008-03-13 Nissan Motor Co Ltd 電力変換装置
JP2008104276A (ja) * 2006-10-18 2008-05-01 Toshiba Schneider Inverter Corp インバータ装置
JP2010093887A (ja) * 2008-10-06 2010-04-22 Toa Corp 電源装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI309493B (en) * 2006-04-28 2009-05-01 Hon Hai Prec Ind Co Ltd Inrush current limiting circuit and power supply device using the same

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008061476A (ja) * 2006-09-04 2008-03-13 Nissan Motor Co Ltd 電力変換装置
JP2008104276A (ja) * 2006-10-18 2008-05-01 Toshiba Schneider Inverter Corp インバータ装置
JP2010093887A (ja) * 2008-10-06 2010-04-22 Toa Corp 電源装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102789307A (zh) * 2012-06-29 2012-11-21 浪潮电子信息产业股份有限公司 一种抑制大功率风扇瞬间冲击电流的节能设计方法及装置
CN105827103A (zh) * 2015-01-05 2016-08-03 华为技术有限公司 一种预防冲击电流的电路和供电电源
CN105827103B (zh) * 2015-01-05 2018-11-30 华为技术有限公司 一种预防冲击电流的电路和供电电源
CN107565803A (zh) * 2017-09-20 2018-01-09 中国电子科技集团公司第四十三研究所 超大容量输入储能电容的浪涌电流抑制电路及抑制方法

Also Published As

Publication number Publication date
TWI426688B (zh) 2014-02-11
TW201145777A (en) 2011-12-16

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