JPH08251963A - Dc brake method for inverter - Google Patents

Dc brake method for inverter

Info

Publication number
JPH08251963A
JPH08251963A JP5615995A JP5615995A JPH08251963A JP H08251963 A JPH08251963 A JP H08251963A JP 5615995 A JP5615995 A JP 5615995A JP 5615995 A JP5615995 A JP 5615995A JP H08251963 A JPH08251963 A JP H08251963A
Authority
JP
Japan
Prior art keywords
voltage
induction motor
current
inverter
inverter device
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
JP5615995A
Other languages
Japanese (ja)
Inventor
Tomoaki Izumimoto
智昭 泉本
Chukichi Mukai
忠吉 向井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Electric Works Co Ltd
Original Assignee
Matsushita Electric Works 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 Works Ltd filed Critical Matsushita Electric Works Ltd
Priority to JP5615995A priority Critical patent/JPH08251963A/en
Publication of JPH08251963A publication Critical patent/JPH08251963A/en
Withdrawn legal-status Critical Current

Links

Abstract

PURPOSE: To obtain an DC brake method for inverter in which DC brake can be applied to an induction motor without causing any tripping. CONSTITUTION: Upon receiving a stop command signal for an induction motor M, a control section 2 sustains the voltage command value at 0V for a predetermined time after receiving the stop command signal. In other words, operation of an inverter section 1 is stopped under that state and no voltage is applied to the induction motor M which thereby enters into free run state. After that state is sustained for a predetermined time, the control section 2 generates a voltage command for increasing the voltage up to a set level at a constant rate and controls the inverter section 1 with a frequency command for bringing the output frequency to 0 Hz. Consequently, a DC voltage increasing at a constant rate from 0V is applied to the induction motor M which is thereby braked to be stopped.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、誘導電動機を制御する
ためのインバータ装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inverter device for controlling an induction motor.

【0002】[0002]

【従来の技術】誘導電動機を制御するためのインバータ
装置において誘導電動機を停止させる際に誘導電動機の
固定子を電気的に固定する方法としては直流を誘導電動
機に印加する方法がある。
2. Description of the Related Art As a method of electrically fixing a stator of an induction motor when stopping the induction motor in an inverter device for controlling the induction motor, there is a method of applying direct current to the induction motor.

【0003】[0003]

【発明が解決しようとする課題】上記直流電圧の印加に
よる制動を用いると、減速時間を短くすることができる
が、停止指令信号の入力と同時に高速回転動作中の誘導
電動機に直流電圧を印加すると、インバータ装置がトリ
ップしてしまうという問題があった。請求項1の発明
は、上述の問題点に鑑みて為されたもので、その目的と
するところはトリップすることなく誘導電動機に直流制
動をかけることができるインバータ装置の直流制動方法
を提供するにある。
When the braking by applying the DC voltage is used, the deceleration time can be shortened. However, if the DC voltage is applied to the induction motor during high speed rotation at the same time when the stop command signal is input, There was a problem that the inverter device trips. The invention of claim 1 is made in view of the above problems, and its object is to provide a direct-current braking method for an inverter device capable of direct-current braking the induction motor without tripping. is there.

【0004】請求項2の発明の目的とするところは、特
に高速回転中の誘導電動機をトリップすることなく短時
間で減速停止させることができるインバータ装置の直流
制動方法を提供するにある。
It is an object of the invention of claim 2 to provide a DC braking method for an inverter device which can decelerate and stop the induction motor particularly during high speed rotation without tripping.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するため
に請求項1の発明では、直流をスイッチングして交流に
変換し、その交流を誘導電動機に駆動電源として供給す
るインバータ装置において、誘導電動機を停止させる停
止指令信号の入力タイミングから誘導電動機に電圧印加
を行わないウエイト時間を経た後、誘導電動機に直流電
圧を印加するとともにその印加する直流電圧を0Vから
一定の比率で設定値まで上昇させることを特徴とする。
In order to achieve the above object, according to the invention of claim 1, in an inverter device for switching a direct current to convert it into an alternating current and supplying the alternating current to an induction motor as a driving power source, an induction motor. After a wait time in which no voltage is applied to the induction motor from the input timing of the stop command signal for stopping the induction motor, a DC voltage is applied to the induction motor and the applied DC voltage is increased from 0V to a set value at a constant rate. It is characterized by

【0006】請求項2の発明では、請求項1の発明にお
いて、誘導電動機に直流電圧を上昇させながら印加して
いる期間中に出力電流値が予め設定した検出レベルを越
えると直流電圧の上昇を停止させ、その後出力電流値が
検出レベルまで低下すると直流電圧の上昇を再開させる
ことを特徴とする。
According to a second aspect of the present invention, in the first aspect of the invention, when the output current value exceeds a preset detection level during the period in which the DC voltage is being applied to the induction motor while being increased, the DC voltage is increased. It is characterized in that it is stopped and then the rise of the DC voltage is restarted when the output current value drops to the detection level.

【0007】[0007]

【作用】請求項1の発明によれば、停止指令信号の入力
タイミングから電圧を印加しないウェイト時間を設定し
ているため、回転動作中から直流電圧を印加して制動を
かける間にフリーラン状態にすることができ、その上印
加する電圧を設定値まで一定比率で上昇させるので、イ
ンバータ装置をトリップさせることなくスムースに誘導
電動機を減速停止させることができる。
According to the first aspect of the invention, since the wait time during which the voltage is not applied is set from the input timing of the stop command signal, the free running state is applied during the braking by applying the DC voltage during the rotation operation. In addition, since the applied voltage is increased to a set value at a constant rate, the induction motor can be smoothly decelerated and stopped without tripping the inverter device.

【0008】特に請求項2の発明によれば、誘導電動機
に直流電圧を上昇させながら印加している期間中に出力
電流値が予め設定した検出レベルを越えると直流電圧の
上昇を停止させ、その後出力電流値が検出レベルまで低
下すると直流電圧の上昇を再開させるので、高速回転し
ている誘導電動機であっても、インバータ装置をトリッ
プさせることなく短時間で減速停止させることができる
のである。
According to the second aspect of the present invention, when the output current value exceeds a preset detection level during the period when the DC voltage is being applied to the induction motor while the DC voltage is being increased, the increase of the DC voltage is stopped, and then the DC voltage is stopped. When the output current value drops to the detection level, the rise of the DC voltage is restarted, so that even an induction motor rotating at a high speed can be decelerated and stopped in a short time without tripping the inverter device.

【0009】[0009]

【実施例】以下、本発明の実施例を図面を参照して説明
する。図1は本発明方法を用いるインバータ装置の一実
施例の全体構成を示しており、本実施例のインバータ装
置は交流電源ACを全波整流器DBで整流した後、平滑
コンデンサC1 で平滑し、その平滑して得られた直流電
圧をインバータ部1で交流電圧に変換し、その変換した
電圧を誘導電動機Mに印加するようになっている。
Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an overall configuration of an embodiment of an inverter device using the method of the present invention. In the inverter device of the present embodiment, an AC power source AC is rectified by a full-wave rectifier DB and then smoothed by a smoothing capacitor C 1 . The smoothed DC voltage is converted into an AC voltage by the inverter unit 1, and the converted voltage is applied to the induction motor M.

【0010】制御部2は外部からの周波数指令や操作指
令に基づいてインバータ部1の出力周波数及び出力電圧
を可変制御するためのもので、インバータ部1のスイッ
チング素子をPWM信号によりオンオフするようになっ
ており、出力周波数を0Hzつまり直流から所定周波数
まで可変できるようになっている。またインバータ部1
と平滑コンデンサC1 との間に挿入している電流検出部
3でインバータ部1の出力電流を検出して、出力制御に
用いている。
The control unit 2 is for variably controlling the output frequency and output voltage of the inverter unit 1 on the basis of a frequency command or an operation command from the outside, so that the switching element of the inverter unit 1 is turned on / off by a PWM signal. The output frequency can be varied from 0 Hz, that is, DC to a predetermined frequency. Inverter unit 1
The output current of the inverter unit 1 is detected by the current detection unit 3 inserted between the smoothing capacitor C 1 and the smoothing capacitor C 1 and used for output control.

【0011】電源部4は制御部2に直流電圧を供給する
ためのものである。次の本発明方法を上記インバータ装
置を用いて説明する。今制御部2が周波数指令に基づい
てインバータ部1のスイッチング素子Q1 …を制御して
所定の周波数の交流電圧をインバータ部1より出力させ
誘導電動機Mを図2(a)に示すように回転させている
際に、操作指令として停止指令信号が図2(b)に示す
ように入力すると、制御部2は電圧指令値をまず上記停
止指令信号が入力したタイミングから一定時間0Vとす
る。つまりこの状態ではインバータ部1の動作が停止し
て誘導電動機Mは電圧が印加されずフリーラン状態とな
る。
The power supply unit 4 is for supplying a DC voltage to the control unit 2. The following method of the present invention will be described using the above inverter device. Rotating the induction motor M switching elements to Q 1 inverter unit 1 ... control to an AC voltage of a predetermined frequency is outputted from the inverter unit 1 as shown in FIG. 2 (a) based on the control unit 2 is frequency reference now When the stop command signal is input as the operation command as shown in FIG. 2B during the operation, the control unit 2 first sets the voltage command value to 0V for a certain time from the timing when the stop command signal is input. That is, in this state, the operation of the inverter unit 1 is stopped and the induction motor M is in a free-run state with no voltage applied.

【0012】この状態を一定時間T継続させた後、つま
り直流制動をかける前にウェイト時間を設定し、このウ
ェイト時間を経たのち、図2(c)に示すように設定値
まで一定比率で電圧を上昇させる電圧指令値を発生し且
つ出力周波数を0Hzとする周波数指令により、インバ
ータ部1を制御する。従って誘導電動機Mには0Vから
一定比率で上昇する直流電圧が印加されて直流制動がか
かり、減速停止することになる。
After this state is continued for a certain period of time T, that is, before the DC braking is applied, a wait time is set, and after this wait time has elapsed, the voltage is set to a set value at a constant rate as shown in FIG. 2 (c). The inverter unit 1 is controlled by a frequency command that generates a voltage command value for increasing the output frequency and sets the output frequency to 0 Hz. Therefore, the induction motor M is applied with a DC voltage that rises from 0 V at a constant rate, is subjected to DC braking, and is decelerated and stopped.

【0013】ここで誘導電動機Mが高速回転中であった
場合、印加される直流電圧が上昇するにつれて電流検出
部3の検出電流が図2(d)に示すように上昇して所定
の検出レベルLに達する。このまま電圧上昇を継続させ
ると、インバータ装置がトリップするが、制御部2は電
圧上昇を検出レベルLを越えた時点で停止させてその時
点の電圧を維持して誘導電動機Mに印加する。このため
一旦上昇した電流が検出レベルLまで下降することにな
る。この時点で制御部2は一定比率で再び電圧指令値を
上昇させ印加電圧を上昇させる。このようにして検出電
流が検出レベルLを越えると電圧上昇を停止させ、検出
電流が検出レベルLまで下降すると電圧上昇を再開させ
るようにして最終的に誘導電動機Mに印加する直流電圧
を設定値まで上昇させ以後その設定値の電圧の印加を維
持する。
Here, when the induction motor M is rotating at a high speed, the detected current of the current detector 3 increases as shown in FIG. 2 (d) as the applied DC voltage rises, and a predetermined detection level is reached. Reach L. If the voltage increase is continued as it is, the inverter device trips, but the control unit 2 stops the voltage increase at the time when the detection level L is exceeded and maintains the voltage at that time and applies it to the induction motor M. For this reason, the current once increased falls to the detection level L. At this point, the controller 2 again increases the voltage command value and the applied voltage at a constant rate. In this way, when the detected current exceeds the detection level L, the voltage rise is stopped, and when the detected current drops to the detection level L, the voltage rise is restarted, and the DC voltage finally applied to the induction motor M is set to the set value. The voltage of the set value is maintained thereafter.

【0014】このように電圧指令値の上昇を検出電流に
応じて制御することにより、高速回転中であった誘導電
動機Mでもインバータ装置をトリップさせることなく短
時間で減速停止させることができるのである。
By controlling the rise of the voltage command value in accordance with the detected current in this way, the induction motor M, which was rotating at high speed, can be decelerated and stopped in a short time without tripping the inverter device. .

【0015】[0015]

【発明の効果】請求項1の発明は、停止指令信号の入力
タイミングから電圧を印加しないウェイト時間を設定し
ているため、回転動作中から直流電圧を印加して制動を
かける間にフリーラン状態にすることができ、その上印
加する電圧を設定値まで一定比率で上昇させるので、イ
ンバータ装置をトリップさせることなくスムースに誘導
電動機を減速停止させることができるという効果があ
る。
According to the first aspect of the present invention, since the wait time in which the voltage is not applied is set from the input timing of the stop command signal, the free running state is applied during the braking by applying the DC voltage during the rotation operation. In addition, since the voltage to be applied is raised to the set value at a constant rate, the induction motor can be smoothly decelerated and stopped without tripping the inverter device.

【0016】特に請求項2の発明は、誘導電動機に直流
電圧を上昇させながら印加している期間中に出力電流値
が予め設定した検出レベルを越えると直流電圧の上昇を
停止させ、その後出力電流値が検出レベルまで低下する
と直流電圧の上昇を再開させるので、高速回転している
誘導電動機に制動をかけて停止させる場合にも、インバ
ータ装置をトリップさせることなく短時間で減速停止さ
せることができるという効果がある。
In particular, the invention of claim 2 stops the rise of the DC voltage when the output current value exceeds a preset detection level during the period of applying the DC voltage to the induction motor while raising the DC voltage, and then the output current is increased. When the value drops to the detection level, the rise of the DC voltage is resumed, so even when the induction motor that is rotating at high speed is braked and stopped, the inverter device can be decelerated and stopped in a short time without tripping. There is an effect.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例の全体構成図である。FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

【図2】同上の動作説明用タイムチャートである。FIG. 2 is a time chart for explaining the above operation.

【符号の説明】[Explanation of symbols]

1 インバータ部 2 制御部 3 電流検出部 4 電源部 M 誘導電動機 1 Inverter part 2 Control part 3 Current detection part 4 Power supply part M Induction motor

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】直流をスイッチングして交流に変換し、そ
の交流を誘導電動機に駆動電源として供給するインバー
タ装置において、誘導電動機を停止させる停止指令信号
の入力タイミングから誘導電動機に電圧印加を行わない
ウエイト時間を経た後、誘導電動機に直流電圧を印加す
るとともにその印加する直流電圧を0Vから一定の比率
で設定値まで上昇させることを特徴とするインバータ装
置の直流制動方法。
1. In an inverter device for switching direct current to convert it to alternating current and supplying the alternating current to an induction motor as a drive power source, no voltage is applied to the induction motor from the input timing of a stop command signal for stopping the induction motor. A direct-current braking method for an inverter device, which comprises applying a direct-current voltage to an induction motor and increasing the applied direct-current voltage from 0 V to a set value at a constant rate after a wait time has passed.
【請求項2】誘導電動機に直流電圧を上昇させながら印
加している期間中に出力電流値が予め設定した検出レベ
ルを越えると直流電圧の上昇を停止させ、その後出力電
流値が検出レベルまで低下すると直流電圧の上昇を再開
させることを特徴とする請求項1記載のインバータ装置
の直流制動方法。
2. When the output current value exceeds a preset detection level during the period when the DC voltage is being applied to the induction motor while the DC voltage is being increased, the rise of the DC voltage is stopped, and then the output current value is lowered to the detection level. Then, the DC braking method for the inverter device according to claim 1, wherein the rise of the DC voltage is restarted.
JP5615995A 1995-03-15 1995-03-15 Dc brake method for inverter Withdrawn JPH08251963A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5615995A JPH08251963A (en) 1995-03-15 1995-03-15 Dc brake method for inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5615995A JPH08251963A (en) 1995-03-15 1995-03-15 Dc brake method for inverter

Publications (1)

Publication Number Publication Date
JPH08251963A true JPH08251963A (en) 1996-09-27

Family

ID=13019322

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5615995A Withdrawn JPH08251963A (en) 1995-03-15 1995-03-15 Dc brake method for inverter

Country Status (1)

Country Link
JP (1) JPH08251963A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004329604A (en) * 2003-05-08 2004-11-25 Toshiba Corp Controller for washing machine
JP2012239335A (en) * 2011-05-13 2012-12-06 Hitachi Appliances Inc Motor control device and air conditioner
CN103427726A (en) * 2012-05-15 2013-12-04 三菱电机株式会社 Control device for acceleration and deceleration
CN103580552A (en) * 2012-07-31 2014-02-12 台达电子工业股份有限公司 Motor reducing method and motor driving device using the reducing method
CN110888357A (en) * 2019-11-22 2020-03-17 珠海格力智能装备有限公司 Robot control method and device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004329604A (en) * 2003-05-08 2004-11-25 Toshiba Corp Controller for washing machine
JP2012239335A (en) * 2011-05-13 2012-12-06 Hitachi Appliances Inc Motor control device and air conditioner
CN103427726A (en) * 2012-05-15 2013-12-04 三菱电机株式会社 Control device for acceleration and deceleration
CN103580552A (en) * 2012-07-31 2014-02-12 台达电子工业股份有限公司 Motor reducing method and motor driving device using the reducing method
CN103580552B (en) * 2012-07-31 2016-05-25 台达电子工业股份有限公司 Motor retarding method and apply the motor drive of this retarding method
CN110888357A (en) * 2019-11-22 2020-03-17 珠海格力智能装备有限公司 Robot control method and device

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Legal Events

Date Code Title Description
A300 Withdrawal of application because of no request for examination

Free format text: JAPANESE INTERMEDIATE CODE: A300

Effective date: 20020604