WO2017085820A1 - Dispositif de conversion de puissance - Google Patents

Dispositif de conversion de puissance Download PDF

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Publication number
WO2017085820A1
WO2017085820A1 PCT/JP2015/082480 JP2015082480W WO2017085820A1 WO 2017085820 A1 WO2017085820 A1 WO 2017085820A1 JP 2015082480 W JP2015082480 W JP 2015082480W WO 2017085820 A1 WO2017085820 A1 WO 2017085820A1
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WO
WIPO (PCT)
Prior art keywords
induced voltage
voltage information
power converter
unit
store
Prior art date
Application number
PCT/JP2015/082480
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English (en)
Japanese (ja)
Inventor
祐介 荒尾
雄作 小沼
Original Assignee
株式会社日立産機システム
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 株式会社日立産機システム filed Critical 株式会社日立産機システム
Priority to JP2017551451A priority Critical patent/JP6535756B2/ja
Priority to PCT/JP2015/082480 priority patent/WO2017085820A1/fr
Publication of WO2017085820A1 publication Critical patent/WO2017085820A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors

Definitions

  • the present invention relates to a power conversion device.
  • Patent Document 1 JP-A-2003-164188. This publication states that “a permanent magnet synchronous motor, an inverter that operates the motor, a current detector that detects a current flowing through the motor, and a rotor position of the motor that is detected by the current detector.
  • An electric motor drive device having an inverter control means for driving without a position sensor without performing a position sensor has a function of identifying a motor constant of a permanent magnet motor by the inverter control means, and the electric motor based on the motor constant identified by the inverter control means
  • the motor output calculation means for calculating the output of the motor, and the adjustment means for adjusting the output from the inverter according to the calculation result of the output calculation means is provided, so that the motor is sensorlessly driven with high efficiency.
  • Patent Document 1 describes a permanent magnet motor device that operates a motor in a highly efficient operating state while detecting a motor constant that changes every moment when the motor operates, and a driving method of the permanent magnet motor. . Further, Patent Document 1 describes that when obtaining a counter electromotive voltage constant of a synchronous motor that needs to be rotated for tuning, it is forcibly rotated by voltage control, but a specific method is not shown. In the mechanism of Patent Document 1, when the rotation speed is not fed back by an encoder or the like, it is impossible to determine whether or not information has been successfully acquired in a state where current is detected halfway due to step-out.
  • the induced voltage information is a control constant used for driving vector control, and is generally performed while automatically correcting in real time during operation.
  • the reference value of the induced voltage information is greatly different, acceleration may become unstable and the characteristics may not be obtained.
  • the induced voltage information of the synchronous motor is not acquired, the initial operation is performed in a state that is not an optimum value, and thus there may be no characteristic from the start.
  • a correct motor constant is required, but there is a problem that manual adjustment is required many times when accuracy of automatic adjustment is insufficient.
  • the present application includes a plurality of means for solving the above problems.
  • An AC converter that outputs desired AC power
  • a controller that calculates induced voltage information based on a current value output from the AC converter, and stability information of the induced voltage information calculated by the controller
  • a determination unit that determines whether or not to store the induced voltage information.
  • a power conversion device capable of tuning an electric motor with high accuracy is provided.
  • FIG. 10 is a flowchart illustrating a tuning procedure performed by a determination unit 112 according to the first, second, and third embodiments. It is a mode which showed the signal data and induced voltage information which the judgment part in Example 1 performs. 10 is an example of an operation panel according to the second embodiment. It is an example of the connection of the power converter device in Example 3 and an external system.
  • an induced voltage constant is determined to be a stable state and stored when an induced voltage constant caused by rotation of a synchronous motor is unknown among AC motors.
  • FIG. 1 is an example of a configuration diagram of the power conversion device and the synchronous motor 105 of the present embodiment.
  • the three-phase AC power supply 101 the DC converter 102, the smoothing capacitor 103, the AC converter 104, the synchronous motor 105, the current detector 106, the control unit 111, the determination unit 112, the storage unit 113, and the current detection unit 114.
  • a display / operation unit 115 the three-phase AC power supply 101, the DC converter 102, the smoothing capacitor 103, the AC converter 104, the synchronous motor 105, the current detector 106, the control unit 111, the determination unit 112, the storage unit 113, and the current detection unit 114.
  • a display / operation unit 115 the three-phase AC power supply 101, the DC converter 102, the smoothing capacitor 103, the AC converter 104, the synchronous motor 105, the current detector 106, the control unit 111, the determination unit 112, the storage unit 113, and the current detection unit 114.
  • a display / operation unit 115 the three-phase AC power supply 101, the DC converter 102, the smoothing capacitor 103, the AC
  • the three-phase AC power source 101 is, for example, a three-phase AC voltage supplied from an electric power company or an AC voltage supplied from a generator, and outputs it to the DC converter 102.
  • the direct current conversion unit 102 is composed of, for example, a direct current conversion circuit composed of a diode or a direct current conversion circuit using an IGBT and a flywheel diode, converts the alternating voltage input from the three-phase alternating current power supply 101 into a direct current voltage, Output to the smoothing capacitor 103.
  • FIG. 1 shows a direct current conversion unit formed of a diode.
  • the smoothing capacitor 103 smoothes the DC voltage input from the DC converter 102 and outputs the DC voltage to the AC converter 104.
  • the smoothing capacitor 103 may be input with a DC voltage directly from the generator without passing through the DC converter 102.
  • the AC conversion unit 104 is configured by an AC conversion circuit using, for example, an IGBT and a flywheel diode, receives the DC voltage of the smoothing capacitor 103 and the output command of the voltage conversion unit 109 as input, converts the DC voltage into an AC voltage, Output to the synchronous motor 105.
  • the current detector 106 is composed of, for example, a Hall CT or a shunt resistor, and is arranged at the output unit of the power conversion device to detect a current flowing through the synchronous motor 105 and outputs it to the current detection unit 114 as a current detection value.
  • the current detector 106 may be disposed anywhere as long as it is disposed at a position where the three-phase output current can be estimated or directly detected.
  • FIG. 1 shows an example in which the current flowing through the AC motor 105 is detected.
  • the control unit 111 gives a PWM output command to the AC conversion unit 104 in accordance with the vector-calculated output command. Further, the control unit 111 performs a frequency / voltage calculation to be output using the current value acquired from the current detection unit 114. Further, the control unit 111 outputs the induced voltage information corrected in the frequency / voltage calculation to the determination unit 112.
  • the determination unit 112 determines storage of data from the induced voltage information output from the control unit 111 and the data stability determination information, and outputs the induced voltage information and the storage command to the storage unit 113.
  • the storage unit 113 is composed of, for example, an EEPROM or a data flash ROM, receives the induced voltage information and the storage command output from the determination unit 112, and stores the induced voltage information when there is a storage command.
  • the current detection unit 114 outputs the current information input from the current detector 106 to the control unit 111, for example.
  • the display / operation unit 115 shows a user interface that is an operation panel or an input / output terminal, for example, and outputs information operated by the user or a signal obtained from an external device to the determination unit 112, for example.
  • the display / operation unit determines a determination time, a stability range, a tuning state setting, and the like that are set in advance for the user to acquire the induced voltage information
  • the display / operation unit 115 is determined.
  • the information is output to the storage unit 113.
  • FIG. 2 is a flowchart illustrating a tuning procedure performed by the determination unit 112 according to the first embodiment.
  • the determination unit 112 monitors, for example, an ON / OFF terminal input command input to the display / operation unit 115 or monitors a tuning state set in the storage unit 113 through the display / operation unit 115 in advance. If there is, the motor information acquisition process is started (S201). For example, the determination unit 112 can prevent the data from being rewritten due to an erroneous trigger when the processing is continued when the tuning state is not set, and is different from the timing intended by the user. It is possible to prevent the data from being rewritten depending on the state.
  • the determination unit 112 acquires induced voltage information calculated by the control unit 111 through vector control (S202).
  • the induced voltage information calculated by the control unit 111 by vector control is the correct induced voltage information calculated from the set induced voltage information calculated from the current flowing in the motor and the motor constants such as the resistance and inductance of the synchronous motor. Indicates the result of the calculation to be corrected.
  • the determination unit 112 acquires trigger information issued by the control unit 111 (S203), determines whether there is a trigger (S204), and if there is a trigger, in order to store the information, the storage unit 113 stores the information. Command to memorize the induced voltage information. If there is no trigger, the motor control is performed as usual without storing (S206).
  • FIG. 3 shows how the control unit 111 determines whether or not the induced voltage information is stable as data.
  • the control unit 111 reads and monitors the data stability determination range set in advance before the tuning operation, for example, ⁇ 0.01 V / (rad / s), and the data stability determination time, for example, 1 second, from the storage unit 113.
  • the data stability determination range set in advance before the tuning operation, for example, ⁇ 0.01 V / (rad / s)
  • the data stability determination time for example, 1 second
  • the present embodiment is a modification of the first embodiment, and the configuration of the second embodiment has the same function as the configuration denoted by the same reference numeral shown in FIG. Description is omitted.
  • the second embodiment is different from the first embodiment in FIG.
  • the display / operation unit 115 issues a trigger based on a signal input to the display / operation unit 115 by the user and stores the data.
  • a motor whose induced voltage information is unknown is driven, it is very difficult to control the rotation of the motor unless the induced voltage information is correct.
  • tuning automatically if the current flows in a state similar to the normal state even if it is abnormal due to a step-out of the motor, the user determines that it is correct and the tuning is completed. Even if it is recognized as abnormal, tuning ends as normal.
  • the determination unit 112 determines storage of data from the induced voltage information output from the control unit 111 and the signal input from the display / operation unit 115, and sends the induced voltage information and the storage command to the storage unit 113. Output.
  • the display / operation unit 115 shows a user interface that is an operation panel or an input / output terminal, for example, and outputs information operated by the user or a signal obtained from an external device to the determination unit 112, for example.
  • the display / operation unit 115 outputs the determined information to the storage unit 113 by using a signal generated from the outside as a user presses a key on the operation panel 400 or the like.
  • FIG. 4 shows an example of the operation panel of the display / operation unit 115 where the user can check the internal information.
  • the operation panel 400 includes a display unit 401, a data determination unit 402, and a data operation unit 403.
  • the display unit 401 can display internal data through the display / operation unit 115. For example, by displaying the determination signal shown in FIG. 3, it is possible to notify the outside that the data is stable.
  • the data determination unit 402 when the data determination unit 402 is pressed when data is displayed on the display unit 401, the data determination unit 402 outputs a data storage command to the storage unit 113.
  • the data operation unit 403 is operated when changing the data displayed on the display unit 401, for example, by changing the parameter value to enable the function.
  • the present embodiment is a modification of the first embodiment, and the configuration of the third embodiment has the same function as the configuration denoted by the same reference numeral shown in FIG. Description is omitted.
  • the trigger generation conditions are different from those in the first embodiment in FIG.
  • an external system issues a trigger and stores data.
  • tuning automatically if the current flows in a state similar to the normal state even if it is abnormal due to a motor step-out, etc., the system will Even if it does not shift to normal operation, tuning ends as normal.
  • the determination unit 112 determines data storage from the induced voltage information output from the control unit 111 and the signal input from the display / operation unit 115, and sends the induced voltage information and the storage command to the storage unit 113. Output.
  • the display / operation unit 115 shows a user interface that is an operation panel or an input / output terminal, for example, and outputs information operated by the user or a signal obtained from an external device to the determination unit 112, for example.
  • FIG. 5 shows a connection configuration with the external device of this embodiment.
  • the system (503) connected to the shaft of the synchronous motor (502) feeds back the status of normal operation to the power converter (501).
  • the information fed back here is, for example, recognition information that the stirring is normally performed if the system (503) is a stirrer, and recognition information that the water pressure data of the pump is changing normally if the system is a pump.
  • the information indicates that the synchronous motor is operating normally as a system without step-out.
  • the display / operation unit 115 outputs the determined information to the storage unit 113.
  • this invention is not limited to an above-described Example, Various modifications are included.
  • the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described.
  • a part of the configuration of one embodiment can be replaced with the configuration of another embodiment, and the configuration of another embodiment can be added to the configuration of one embodiment.
  • each of the above-described configurations, functions, processing units, processing means, and the like may be realized by hardware by designing a part or all of them with, for example, an integrated circuit.
  • Each of the above-described configurations, functions, and the like may be realized by software by interpreting and executing a program that realizes each function by the processor.
  • Information such as programs, tables, and files for realizing each function can be stored in a recording device such as a memory, a hard disk, an SSD (Solid State Drive), or a recording medium such as an IC card, an SD card, or a DVD.
  • control lines and information lines indicate what is considered necessary for the explanation, and not all the control lines and information lines on the product are necessarily shown. Actually, it may be considered that almost all the components are connected to each other.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Control Of Electric Motors In General (AREA)
  • Inverter Devices (AREA)

Abstract

La présente invention aborde le problème selon lequel, même après l'accomplissement d'un réglage, il n'est pas possible de déterminer si le réglage a été accompli ou non dans un état dans lequel un système fonctionne normalement et si le réglage doit être effectué de nouveau si un fonctionnement devient instable après l'installation d'un moteur dans le système. Ce dispositif de conversion de puissance est équipé de : une unité de conversion CA qui délivre une puissance CA souhaitée ; une unité de commande qui calcule des informations de tension induite sur la base de la valeur du courant délivré par l'unité de conversion CA ; et une unité de détermination qui détermine, sur la base d'informations de stabilité des informations de tension induite calculées par l'unité de commande s'il faut stocker ou non les informations de tension induite.
PCT/JP2015/082480 2015-11-19 2015-11-19 Dispositif de conversion de puissance WO2017085820A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2017551451A JP6535756B2 (ja) 2015-11-19 2015-11-19 電力変換装置
PCT/JP2015/082480 WO2017085820A1 (fr) 2015-11-19 2015-11-19 Dispositif de conversion de puissance

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2015/082480 WO2017085820A1 (fr) 2015-11-19 2015-11-19 Dispositif de conversion de puissance

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WO2017085820A1 true WO2017085820A1 (fr) 2017-05-26

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005039889A (ja) * 2003-07-15 2005-02-10 Hitachi Ltd 電動機の制御方法
JP2009247207A (ja) * 2009-06-15 2009-10-22 Hitachi Industrial Equipment Systems Co Ltd 電力変換装置
US20140042940A1 (en) * 2011-03-25 2014-02-13 Technelec Ltd Method and Apparatus for Control of Electrical Machines
WO2015097733A1 (fr) * 2013-12-24 2015-07-02 株式会社日立産機システム Dispositif de conversion de courant
JP2015164846A (ja) * 2015-04-27 2015-09-17 株式会社ジェイテクト 車両用操舵装置

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005039889A (ja) * 2003-07-15 2005-02-10 Hitachi Ltd 電動機の制御方法
JP2009247207A (ja) * 2009-06-15 2009-10-22 Hitachi Industrial Equipment Systems Co Ltd 電力変換装置
US20140042940A1 (en) * 2011-03-25 2014-02-13 Technelec Ltd Method and Apparatus for Control of Electrical Machines
WO2015097733A1 (fr) * 2013-12-24 2015-07-02 株式会社日立産機システム Dispositif de conversion de courant
JP2015164846A (ja) * 2015-04-27 2015-09-17 株式会社ジェイテクト 車両用操舵装置

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JP6535756B2 (ja) 2019-06-26
JPWO2017085820A1 (ja) 2018-07-12

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