WO2003098792A1 - Procede de commande d'un moteur a induction - Google Patents

Procede de commande d'un moteur a induction Download PDF

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Publication number
WO2003098792A1
WO2003098792A1 PCT/JP2003/005988 JP0305988W WO03098792A1 WO 2003098792 A1 WO2003098792 A1 WO 2003098792A1 JP 0305988 W JP0305988 W JP 0305988W WO 03098792 A1 WO03098792 A1 WO 03098792A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
induction motor
frequency
inverter
output
Prior art date
Application number
PCT/JP2003/005988
Other languages
English (en)
Japanese (ja)
Inventor
Yasuhisa Takamoto
Ichiro Ishida
Original Assignee
Fuji Electric Holdings 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 Fuji Electric Holdings Co., Ltd. filed Critical Fuji Electric Holdings Co., Ltd.
Priority to JP2004506173A priority Critical patent/JPWO2003098792A1/ja
Priority to AU2003235295A priority patent/AU2003235295A1/en
Publication of WO2003098792A1 publication Critical patent/WO2003098792A1/fr

Links

Classifications

    • 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
    • H02P27/00—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage
    • H02P27/04—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage
    • H02P27/048—Arrangements or methods for the control of AC motors characterised by the kind of supply voltage using variable-frequency supply voltage, e.g. inverter or converter supply voltage using AC supply for only the rotor circuit or only the stator circuit
    • 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
    • H02P29/40—Regulating or controlling the amount of current drawn or delivered by the motor for controlling the mechanical load

Definitions

  • the present invention relates to a control method for an induction motor that drives an industrial machine that requires an extremely large driving torque at startup, such as a textile machine, and more particularly to a startup control method.
  • VVVF variable voltage variable frequency
  • 1 is an AC commercial power supply
  • 2 is a VVVF inverter composed of an inverter main circuit 21 and an inverter control circuit 22
  • 3 is a switching switch circuit composed of magnetic contactors MC I and MC 2
  • 4 is an induction motor
  • 5 is a load such as a textile machine driven by the induction motor 4
  • 6 is an AC reactor
  • 7 is a sequence control circuit.
  • the VVVF inverter 2 can output an AC voltage having a phase synchronized with the voltage phase of the commercial power supply 1 by the control operation of the inverter control circuit 2 2 .
  • the operation of the induction motor 4 by the operation circuit shown in FIG. 3 is described below. Will be described.
  • both the magnetic contactors MC 1 and MC 2 are open.
  • the switching switch 3 is switched to the switching circuit 3 from the sequence control circuit 7 to the MC 1 as a switching signal. Is issued, and when the magnetic contactor MC 1 closes, the quotient
  • the induction motor 4 supplied with electric power from the power supply 1 starts up together with the load 5, and the rotation is completed when the rotation speed of the induction motor 4 reaches the rotation speed corresponding to the frequency of the commercial power supply 1.
  • the VVV F impeller 2 is also activated by the input command to the electromagnetic contactor MC 1, and its output is changed from the minimum allowable voltage and minimum allowable frequency AC voltage to the rated voltage and rated frequency of the commercial power supply 1. It is rapidly increased until the frequency becomes the AC voltage.
  • the inverter control circuit 22 monitors the voltage phase of any one phase of the commercial power supply 1 and the voltage phase of the phase corresponding to the commercial power supply 1 of the output voltage of the VVV. When several cycles are matched, a synchronization completion signal is sent to the sequence control circuit 7.
  • the sequence control circuit 7 uses the synchronization completion signal as a switching signal to open the circuit to the electromagnetic contactor MC 1 as a switching signal.
  • the command is then delayed by a slight dead time, for example, about 10 ms to 2 Oms, from the opening command to the electromagnetic contactor MC 1 to issue a closing command to the electromagnetic contactor MC 2, whereby the electromagnetic contactor MC 1 Is opened, and the electromagnetic contactor MC 2 is closed a little later than this, and the power supply to the induction motor 4 is switched from the commercial power supply 1 to the output of the VVV F inverter 2.
  • the inrush current from the VVVF inverter 2 to the induction motor 4 is suppressed by the AC reactor 6 installed on the path from the VVVF inverter 2 to the induction motor 4.
  • the VVV F inverter 2 the AC voltage of the commercial power supply 1 is converted to a DC voltage by a diode rectifier and a smoothing capacitor, and this DC voltage is converted to an AC voltage.
  • An inverter main circuit 21 in which an anti-parallel circuit of a transistor to be converted and a diode is connected in advance, and the voltage of the AC output voltage of the inverter main circuit 21 by turning on and off the transistor by, for example, PWM control.
  • this VVV F inverter 2 is more complicated than that of a general-purpose VVV F inverter, which has only a voltage and frequency control function for controlling the voltage and frequency of the AC output voltage. It is to become. Further, a switching switch circuit 3, an AC reactor 6, a sequence control circuit 7, and the like are required, and the entire circuit configuration shown in FIG. 3 becomes complicated.
  • the rush current from the VVV F inverter 2 to the induction motor 4 is suppressed by the AC reactor 6, but the rotation speed of the induction motor 4 fluctuates due to the AC reactor during switching, and this fluctuation is preferable for the load 5. May not be. Furthermore, since the induction motor 4 that drives a load that requires a very large driving torque at the time of startup, such as a textile machine, is started by the commercial power supply 1, the operation duty of the VVV inverter 2 is reduced.
  • the rotation speed of the induction motor 4 after the start-up is completed depends on the frequency of the commercial power supply 1, and as a result, if the output frequency required by the induction motor 4 is different from the frequency of the commercial power supply 1, the VVV F The power supply by the inverter 2 is started, and finally, an operation to obtain an AC voltage having a frequency required by the induction motor 4 is required, and it takes time until the load 5 enters the operating state.
  • An object of the present invention is to provide an induction motor control method that solves the various problems described above. Disclosure of the invention
  • the method of controlling an induction motor according to the present invention in the method of controlling an induction motor using a variable voltage variable frequency converter, first, the voltage and frequency of the AC output voltage of the induction motor whose primary winding is delta-connected are allowed. Power is supplied to the induction motor from the impeller having the minimum value and the motor is started, and then the output current of the impeller supplying power to the started induction motor is limited to a predetermined upper limit value or less.
  • the output voltage and output frequency of the impeller are gradually increased at a predetermined rate until the output frequency reaches a predetermined frequency set value to accelerate the induction motor, and the output frequency of the inverter is set to the frequency set value. After that, while maintaining the output frequency of the impeller to supply power to the induction motor at the set frequency, the output voltage of the inverter is maintained. Only the voltage is gradually reduced to a predetermined voltage set value at a predetermined reduction rate, and thereafter, the inverter supplies an AC voltage based on the voltage set value and the frequency set value to the induction motor. I do.
  • the present invention relates to an induction motor having a delta-connected primary winding and an AC motor supplied from a variable voltage variable frequency (VVVF) inverter, compared to an induction motor having a primary winding connected in a star connection. Focusing on the fact that the drive torque output by the induction motor can be increased (specifically, about three times), the output current limiting function provided by this VVV F-interter can be used to start up an emergency operation such as textile machinery.
  • VVVF variable voltage variable frequency
  • FIG. 1 is a configuration diagram of an operation circuit showing an embodiment of the present invention.
  • FIG. 2 is a waveform diagram illustrating the operation of the operation circuit of FIG.
  • FIG. 3 is a configuration diagram showing an operation circuit of a conventional induction motor. BEST MODE FOR CARRYING OUT THE INVENTION
  • FIG. 1 is a configuration diagram of an operation circuit illustrating an embodiment of an operation method of an induction motor according to the present invention. Components having the same functions as those of the conventional configuration shown in FIG. 3 are denoted by the same reference numerals.
  • the AC voltage of the commercial power supply 1 is converted to a DC voltage by a diode rectifier and a smoothing capacitor, and a transistor for converting this DC voltage to an AC voltage is provided.
  • An inverter main circuit 81 formed by bridge-connecting an anti-parallel circuit with a diode, a current detector 81a such as a shunt resistor for detecting an output current of the impeller main circuit 81, and the transistor
  • a voltage and frequency control function for outputting an AC voltage of a desired voltage and frequency from the inverter main circuit 81 by turning on and off by PWM control, and a detection value of the current detector 81a are predetermined.
  • the output of the inverter main A VVV inverter 8 comprising an inverter control circuit 82 having a current limiting function for reducing the voltage, an induction motor 9 having a delta connection primary winding, a magnetic contactor 10, and a magnetic contactor 10. It consists of the injection circuit 11 and 1.
  • FIG. 1 The operation of the operation circuit embodying the present invention shown in FIG. 1 will be described below with reference to a waveform diagram shown in FIG.
  • the magnetic contactor 10 is open.
  • Start the VVV F inverter 8 on condition that the voltage of the commercial power supply 1 is established.
  • the started inverter 8 is controlled by the inverter control circuit 82 so that the VVVF inverter 8 outputs an AC voltage of a predetermined voltage and frequency (for example, an allowable minimum voltage and an allowable minimum frequency).
  • the induction motor 9 is started by closing the electromagnetic contactor 10 by a closing command from the closing circuit 11 to start driving the load 5 at a low speed.
  • the VVV F inverter 8 applies the allowable minimum voltage. From the AC voltage of the allowable minimum frequency, the voltage is gradually and almost linearly as shown in FIG. , Start to output the AC voltage with the increased frequency.
  • the inverter control circuit 82 monitors the output current of the impeller main circuit 81 via the current detector 81a during the period in which the voltage and frequency are gradually increased. Is larger than the predetermined upper limit, the control operation of the inverter control circuit 82 suppresses an increase in the amplitude of the output voltage of the inverter main circuit 81 so that the output current becomes equal to or lower than the upper limit. Meanwhile, the VVVF inverter 8 continues to output the AC voltage whose voltage and frequency are gradually increased, as shown in FIG. 2, so that the induction motor 9 continues to accelerate.
  • the increased output frequency of the VVV inverter 8 has reached the previously set frequency setting.
  • the acceleration operation of the induction motor .9 has been completed.
  • the load 5 such as a textile machine requires a very large drive torque at the time of start-up and acceleration.However, since a small drive torque is sufficient when the acceleration is completed, the output torque of the induction motor 9 also decreases upon completion of the acceleration. As shown in FIG. 2, the output current of the VVVF inverter 8 has also been reduced from the state of the upper limit. '
  • Timing inverter control circuit 82 confirms, or to previously obtain the time up to the point 0-1 2 in advance by actual ⁇ may be timing reaches the point 2 by an unshown timer. In other words, it is only necessary to be after this timing.
  • the VVV F By reducing only the amplitude of the output voltage of the impeller 8 to the voltage set value (for example, l Z "3 times the output voltage at ti, or the output voltage that provides the torque required by the load 5) , the output current when the output voltage at the ti time, the output current when the output voltage at t 2 time, since the efficiency and power factor of the induction motor 9 is improved, may be less.
  • the output voltage after the time point t 3 the drive torque is about 3 times, about 1 Bruno 3 times the output voltage at the time Can be ,
  • the induction motor 9 of t 3 after the time is adapted to the energy-saving one operating condition.
  • the continuous rated value of the induction motor 9 with the delta connection of the primary winding may be set from the value after the time t3 described above, and when the induction motor 9 is started and accelerated.
  • the driving torque and output voltage of the output voltage (VZF) ratio need only be able to be output as a short-time rated value.
  • the control method of the present invention since power is supplied to the induction motor via the inverter from the start of the induction motor, the output frequency of the inverter can be directly shifted to a frequency corresponding to a desired speed after the start. Therefore, there is an advantage that the transition time from the start of the induction motor to the desired operation speed can be shortened.
  • the primary winding is a delta-connected induction motor, and the primary winding is a star, by supplying power only from a general-purpose variable voltage variable frequency (VVVF) inverter.
  • VVVF variable voltage variable frequency
  • Starting and accelerating can be performed with a smaller primary current compared to the connected induction motor.
  • the induction motor can be operated with a small driving torque in a textile machine or the like.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Ac Motors In General (AREA)
  • Motor And Converter Starters (AREA)

Abstract

On achemine un courant alternatif de la plus faible tension et fréquence vers un moteur à induction (9) ayant des enroulements primaires delta-connectés provenant d'un onduleur (8) à tension variable et à fréquence variable (VVVF) afin de démarrer le moteur à induction (9). La réduction du courant de sortie de l'onduleur en dessous d'une valeur limite de courant prédéterminée entraîne l'augmentation progressive de la tension de sortie et de la fréquence de sortie. Lorsque la fréquence de sortie atteint une valeur prédéfinie de fréquence prédéterminée et lorsque l'accélération du moteur à induction (9) est terminée, seule la tension de sortie de l'onduleur (VVVF) (8) diminue progressivement pour atteindre une valeur prédéfinie de tension prédéterminée. On peut commander de manière plus convenable le moteur à induction servant à conduire une charge, notamment une machine de fibre nécessitant un couple moteur très élevé au démarrage et pendant l'accélération en acheminant en continu une tension de courant alternatif vers le moteur à induction (9) provenant de l'onduleur (VVVF) (8) et correspondant à la valeur prédéfinie de fréquence et à la valeur prédéfinie de tension.
PCT/JP2003/005988 2002-05-17 2003-05-14 Procede de commande d'un moteur a induction WO2003098792A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2004506173A JPWO2003098792A1 (ja) 2002-05-17 2003-05-14 誘導電動機の制御方法
AU2003235295A AU2003235295A1 (en) 2002-05-17 2003-05-14 Induction motor control method

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002-143025 2002-05-17
JP2002143025 2002-05-17

Publications (1)

Publication Number Publication Date
WO2003098792A1 true WO2003098792A1 (fr) 2003-11-27

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PCT/JP2003/005988 WO2003098792A1 (fr) 2002-05-17 2003-05-14 Procede de commande d'un moteur a induction

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JP (1) JPWO2003098792A1 (fr)
AU (1) AU2003235295A1 (fr)
TW (1) TWI277286B (fr)
WO (1) WO2003098792A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101860286A (zh) * 2010-07-06 2010-10-13 中国北车股份有限公司大连电力牵引研发中心 电机启动阶段提供给定频率的方法
US20110304199A1 (en) * 2010-06-09 2011-12-15 Rozman Gregory I Hybrid electric power architecture for a vehicle
CN103116131A (zh) * 2013-01-18 2013-05-22 广东电网公司佛山供电局 一种10kV大功率电机直接启动对配电网运行电压冲击的测评方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07163188A (ja) * 1993-11-30 1995-06-23 Meidensha Corp 誘導電動機のトルクブースト制御装置
JPH11252986A (ja) * 1998-02-27 1999-09-17 Sanyo Denki Co Ltd 多重巻き電動機の制御装置
JP2001078493A (ja) * 1999-07-07 2001-03-23 Ko Gijutsu Kenkyusho:Kk インバータ装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07163188A (ja) * 1993-11-30 1995-06-23 Meidensha Corp 誘導電動機のトルクブースト制御装置
JPH11252986A (ja) * 1998-02-27 1999-09-17 Sanyo Denki Co Ltd 多重巻き電動機の制御装置
JP2001078493A (ja) * 1999-07-07 2001-03-23 Ko Gijutsu Kenkyusho:Kk インバータ装置

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110304199A1 (en) * 2010-06-09 2011-12-15 Rozman Gregory I Hybrid electric power architecture for a vehicle
US8536729B2 (en) * 2010-06-09 2013-09-17 Hamilton Sundstrand Corporation Hybrid electric power architecture for a vehicle
CN101860286A (zh) * 2010-07-06 2010-10-13 中国北车股份有限公司大连电力牵引研发中心 电机启动阶段提供给定频率的方法
CN103116131A (zh) * 2013-01-18 2013-05-22 广东电网公司佛山供电局 一种10kV大功率电机直接启动对配电网运行电压冲击的测评方法

Also Published As

Publication number Publication date
AU2003235295A1 (en) 2003-12-02
TW200308139A (en) 2003-12-16
TWI277286B (en) 2007-03-21
JPWO2003098792A1 (ja) 2005-10-20

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