JPS58127593A - Picking up method for motor - Google Patents
Picking up method for motorInfo
- Publication number
- JPS58127593A JPS58127593A JP57006547A JP654782A JPS58127593A JP S58127593 A JPS58127593 A JP S58127593A JP 57006547 A JP57006547 A JP 57006547A JP 654782 A JP654782 A JP 654782A JP S58127593 A JPS58127593 A JP S58127593A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- motor
- inverter
- frequency
- control
- 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.)
- Pending
Links
Classifications
-
- 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
- H02H7/08—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 dynamo-electric motors
- H02H7/09—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 dynamo-electric motors against over-voltage; against reduction of voltage; against phase interruption
Landscapes
- Control Of Ac Motors In General (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、マイクロコンビエータとアナログ回路を組合
せた自動電圧制御（ムｖＲ）Ｉｇ回路を持つインバータ
による交流電動機の制御装置におい−Ｃ１瞬時停電時の
モータ拾い上げ方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for picking up a motor during a -C1 instantaneous power outage in an AC motor control system using an inverter having an automatic voltage control (MUVR) Ig circuit that combines a micro combinator and an analog circuit.
交流電動機を電圧形インバータで運転する場合。When operating an AC motor with a voltage type inverter.
ムＶＲ回路が持つ積分要素によシ一時停電の復電時にイ
ンバータ出力電圧が過渡的にはね上がる間−がある。こ
の問題を解消する制御方法として、ＡＶＲ回路の自動電
圧制御可能な時間内での瞬時停電にその復電時の電動機
電圧（周波数１を一致させてインバータ制御を開始させ
るモータの拾い上げ方法が提案されている。Due to the integral element of the system VR circuit, there is a period during which the inverter output voltage rises transiently when the power is restored after a temporary power outage. As a control method to solve this problem, a motor pick-up method has been proposed that matches the motor voltage (frequency 1) at the time of power restoration and starts inverter control in the event of a momentary power outage within the time period in which automatic voltage control of the AVR circuit is possible. ing.
本発明は瞬時停電がインバータの自動！圧制御不可能に
なる時間（例えば１秒）以上になるときに電動機回転か
らモータ拾い上げを可能にし、−ｌＬ’ｌ Ｎ Ｋによ
る装置停止を少なくしたモータ拾い上げｈ法を提供しよ
うとするもので、以下実施例を用いて詳細に説明する。This invention automatically handles momentary power outages using an inverter! The present invention attempts to provide a motor picking-up method that enables the motor to be picked up from the motor rotation when the time when pressure control becomes impossible (for example, 1 second) or longer, and reduces the need for stopping the device due to -lL'lNK. This will be explained in detail below using examples.
第１図は本発明方法の一実施例を示し、同図において、
インバータ本体は配電用しゃ断−１，主スィッチ２を遡
して３相交流電力が供給されるコンバータ３と、この直
流出力を平滑用コンデンサ４．７ユーズ５を通して入力
側に持つインノ（−タロとを具え、インバータ６の電圧
−周波数比一定の夕清出力を負荷しゃ断器１を通して負
荷としての交Ｉ＋＃電＃ＪＪ機（同期電動機又は誘導電
動様）８に供給する。コンバータ３の交流側電圧（受電
電圧）はトランス９で検出され、インノ（−夕６の出力
電圧及び電圧位相がトランスにで検出され、インＩ（−
タロの直流側電圧が直流検出器１で検出され、これら検
出信号は検出回路ＵにおいてＩｋｆＭ伯号への変換やデ
ィジタル信号への変換さらにはタイミング信、号として
取出される。FIG. 1 shows an embodiment of the method of the present invention, in which:
The main body of the inverter consists of a converter 3 to which 3-phase AC power is supplied by going back through the power distribution cutoff 1 and the main switch 2, and the Inno (-Taro) which has this DC output on the input side through smoothing capacitors 4, 7 and 5. , and supplies the output of the inverter 6 with a constant voltage-frequency ratio to the AC I + # JJ machine (synchronous motor or induction motor type) 8 as a load through the load breaker 1.The AC side voltage of the converter 3 (receiving voltage) is detected by the transformer 9, the output voltage and voltage phase of the input (-) are detected by the transformer, and the output voltage and voltage phase of the input (-)
The DC side voltage of the taro is detected by a DC detector 1, and these detection signals are converted into an IkfM signal, a digital signal, and taken out as a timing signal in a detection circuit U.
検出回路Ｕを通した各検出信号はマイクロコンビュータ
ロの入出力ボート１４を通してパスライン正に取出され
、このパスライン正によりＣＰＵ １６ 。Each detection signal passed through the detection circuit U is taken out to the pass line positive through the input/output board 14 of the microcomputer, and the CPU 16 is connected to the pass line positive by this pass line positive.
１’ｔＯＭ １？ 、 ＲＡＭ １Ｂ 、ディジタル−
アナログ変換Ｆ６１９ 。1'tOM 1? , RAM 1B, digital
Analog conversion F619.
電動機の慣性回転状態を判定するためのグログラマブル
カクンタタイマ頷、切換回路２１．ハルス幅変ｐ （Ｐ
ＷＭ ）制御回路ｎ間の結合がなされる。また、検出回
路四の検出信号出力のうち、インバータ出力電圧検出信
号ｖｌ＠ｔ ｉｊ出力設定信号■８との突合せ信号に
され、この偏差はリセット回路付き比例・積分回路にな
る電圧制御増幅器おで壇幅され、インバータ出力電圧制
御信号が取出される。Programmable switching circuit 21 for determining the inertial rotation state of the electric motor. Hals width change p (P
WM) Coupling between control circuits n is made. In addition, among the detection signal outputs of the detection circuit 4, the inverter output voltage detection signal vl@tij output setting signal 8 is used as a comparison signal, and this deviation is output to the voltage control amplifier output, which becomes a proportional/integral circuit with a reset circuit. The inverter output voltage control signal is extracted.
出力設定信号ｖ、Ｖｉマイクロコンピュータ肋での周波
数−電圧比一定のための演算結果としてディジタル−ア
ナログ変換器■のアナログ出力で与えられる。インバー
タの出力周波数及び運転、停止指＋ ｉｉｓ ｉバ不ル
ムから入出力ボート１４を通してマイクロコンピュータ
Ｕに取込まれ、出力周波数指令データはＲＡＭ １８に
格納されてＦｔＯＭ １７のプログラムに従ってＣＰＵ
１６での周波数−電圧の演算がなさね、ティシタルー
アナログ変換器１９から電圧信号ｖ８が取出される。一
方、周波数指令データはＰＷＭ制叙１１１路ｎに与えら
れ、搬送波の変調信号周波数が設定される。この変−信
号の電圧は電圧制動増幅′６２３の出力を対応するディ
ジタル信号に変換するアナログ−ディジタル変換器２の
出力又はＲＡＭ１８から与えられるディジタル信号が切
換回路２１で切換えられる。この切換回路ｎの切換え制
５１１１１−： ＣＰＵ１６での瞬時停電制御において
なされ、変換器５の出力をＲＡＭ １８ Ｋ一時記憶す
るための切換制卸もされる。Output setting signals v and Vi are given as analog outputs of the digital-to-analog converter (2) as calculation results for keeping the frequency-voltage ratio constant at the microcomputer. The output frequency of the inverter and the operation/stop finger + iis i are taken in from the ibarium to the microcomputer U through the input/output board 14, and the output frequency command data is stored in the RAM 18 and sent to the CPU according to the program of the FtOM 17.
A voltage signal v8 is taken out from the digital analog converter 19 without performing the frequency-voltage calculation in step 16. On the other hand, the frequency command data is given to the PWM control 111 path n, and the modulation signal frequency of the carrier wave is set. The voltage of this conversion signal is switched by the switching circuit 21 between the output of the analog-to-digital converter 2 which converts the output of the voltage damping amplifier '623 into a corresponding digital signal, or the digital signal provided from the RAM 18. Switching control 51111- of this switching circuit n: This is done in momentary power outage control by the CPU 16, and switching control for temporarily storing the output of the converter 5 in the RAM 18K is also carried out.
瞬時停電制御には切換回路４の制御のほかに。In addition to controlling switching circuit 4, instantaneous power outage control is performed.
タイマ加の時限設定と動作制御、電圧制御増幅器器のリ
セット制御、クツシ曹ン回路Ｘのリセット制御等がなさ
れる。このためにＯＰＵ １６は瞬時停電発生の有無を
受電電圧検出信号から同期的にチェツタする。クツクヨ
ン回路露はリセット接点２６ Ａの開路でクツクコン設
定電圧Ｖａに比例した傾斜を持って積分動作し、その出
力電圧はリミッタ回路１を通して電圧制御増幅器幼のり
さツタ値ｖを制り
御する。The time limit setting and operation control of the timer, the reset control of the voltage control amplifier, the reset control of the cushion circuit X, etc. are performed. For this purpose, the OPU 16 synchronously checks whether an instantaneous power outage has occurred based on the power reception voltage detection signal. When the reset contact 26A is opened, the coupling circuit performs an integral operation with a slope proportional to the coupling set voltage Va, and its output voltage controls the voltage control amplifier voltage value v through the limiter circuit 1.
このような構成において、インバータ運転指令が入ると
、電圧制御増幅器餡のリセット接点※ム及びクッション
回路Ｘのリセット接点Ｘムが開路され、クッション回路
Ｘの出力電圧によシミ圧制（財）増幅器４の出力電圧が
りミッタ値ｖシに制限されて徐々に上昇してＰＷＭ制御
回路ｎの電圧係数が所定出力電圧になるよう始動電圧制
御をする・この始動制御後は操作パネル＃に設定される
周波数データがＲＡＭ １８から読されてＰＷＭ制御回
路ｎの周゛波ｅ信号として与えられ、これに対応する電
圧制御信号がディジタル−アナ四グ変換器１９を通して
電圧制御増幅器ｎに与えられ、検出回路１２に取出すイ
ンバータ出力電圧のフィードバック制御がなされる。In such a configuration, when an inverter operation command is input, the reset contact of the voltage control amplifier and the reset contact of the cushion circuit X are opened, and the output voltage of the cushion circuit The starting voltage is controlled so that the output voltage of the PWM control circuit n gradually increases while being limited by the limiter value v, and the voltage coefficient of the PWM control circuit n becomes the predetermined output voltage. After this starting control, the frequency set on the operation panel # Data is read from the RAM 18 and provided as a frequency e signal to the PWM control circuit n, and a corresponding voltage control signal is provided to the voltage control amplifier n through the digital-to-analog converter 19, and the detection circuit 12 Feedback control of the inverter output voltage taken out is performed.
こうした通常運転中に、瞬時停電が発生するとき、ＣＰ
Ｕ１６を制御中枢部としてトランス９．Ｗ及び直流検出
器υの検出信号に基づいて以下に示す制御を施す。When a momentary power outage occurs during normal operation, the CP
Transformer 9 with U16 as the control center. The following control is performed based on the detection signal of W and the DC detector υ.
瞬時停電が発生して受電電圧が低下し始め（第２図の時
刻ｔｌ ） 、受電電圧が定格の９０チ以下に低下した
ことをトランスｇの検出信号からＣＰＵ １６が判定す
ると（時刻ｔ、 ） 、ＯＰＵ １＠は停電時間計測の
ためにタイマ（９）の計時動作を開始させる。時刻１、
以後には受電電圧低下によりインバータ６の直流入力電
圧も低下し始め、電圧制御増幅器おの出力はインバータ
出力を一定に保持しようとして上昇し、可制御回路ｎの
電圧係数を高める。しかし、停電が長くなると電圧係数
の増大で補正しきれなくな抄、電圧制御増幅器ｎの出力
は飽和して人ＶＲ制御が不可能になる。このＡＶＲｆ）
ｒｌＪ御不可能な状態は直流検出器１１の検出信号から
ＣＰＵ １６が１α諸て／
電圧の定格７０嗟以下鷲判定し、この判定になった時（
時刻１．）にｃｐｔｒ ｉｓけインバータ６のゲートし
ゃ断をＰ１ＦＭ制御回路ｎの制御で施すと共に電圧制紬
増幅器囚、タックＦン回路Ｘの両接点コム。When a momentary power outage occurs and the receiving voltage begins to drop (time tl in Figure 2), the CPU 16 determines from the detection signal of the transformer g that the receiving voltage has fallen below the rated value of 90 cm (time t, ). , OPU 1@ starts the timer (9) to measure the power outage time. Time 1,
Thereafter, the DC input voltage of the inverter 6 begins to decrease due to the drop in the receiving voltage, and the output of the voltage control amplifier increases in an attempt to keep the inverter output constant, increasing the voltage coefficient of the controllable circuit n. However, if the power outage lasts for a long time, the voltage coefficient increases and the correction cannot be completed, and the output of the voltage control amplifier n becomes saturated, making human VR control impossible. This AVRf)
The CPU 16 determines from the detection signal of the DC detector 11 that the rlJ cannot be controlled if the voltage is below the rated voltage of 70 mm, and when this determination is made (
Time 1. ), the gate of the inverter 6 is cut off under the control of the P1FM control circuit n, and both contacts of the voltage control amplifier and the tack circuit X are connected.
ｒＡを閉路して電圧係数を零にする。Close rA to make the voltage coefficient zero.
この状態でタイ−ｒ２０の時限（例えば２秒）内に受電
電圧が７０１に復電した場合（時刻ｔａ）、ｏｐず１６
は電動機が回転状１１１にあると判断してモータの拾い
上げ蛸、理に入る。但し、タイマ時限に達するも受電電
圧の復電がない場合にはモータ拾い上げ不可能としてイ
ンバータ運転停止処理に入る。In this state, if the receiving voltage is restored to 701 within the time limit (for example, 2 seconds) of tie-r20 (time ta), op 16
determines that the electric motor is in rotational position 111, picks up the motor, and goes to work. However, if the received voltage is not restored even after the timer expires, it is assumed that the motor cannot be picked up and the inverter operation is stopped.
時刻ｔ４で受電電圧が７０％に復電する場合、 ａｐｔ
ｙ１６けインバータの直流電圧も５０％以上に回復した
ことを条件に復電確認用タイマによるカウントを開始さ
せる。このタイマはタイマ毅による計時又は他のカウン
タタイマによるが、何れにしてもＯＰＵ １１１ Ｋよ
ｊｌ） ＲＡＭ １８のタイマデータをカウンタにプリ
セットしてクロックの計数でタイムアツプ信号を得ると
いうハード処理による直流電圧の確立に要する時間を確
保する。When the received voltage returns to 70% at time t4, apt
On the condition that the DC voltage of the y16 inverter has also recovered to 50% or more, the power recovery confirmation timer will start counting. This timer uses a timer or another counter timer, but in any case, the timer data in the OPU 111K RAM 18 is preset in the counter and a time-up signal is obtained by counting the clock. Secure the time required to establish the
復電確認用タイマがタイムアツプする時刻（第３図のｔ
ｓ）にはインバータ出力電圧信号（電１１機１の誘起電
圧信号）をゼロクロスコンバレータテ矩形波に変換した
検出回路Ｕの検出信号（Ｕ−Ｖ同期信号）ＫよるＣＰＵ
１６への割込み処理に入る。The time when the power recovery confirmation timer times out (t in Figure 3)
s) is a CPU using the detection signal (U-V synchronization signal) of the detection circuit U that converts the inverter output voltage signal (induced voltage signal of the electric machine 1) into a zero-cross converter rectangular wave.
16 starts interrupt processing.
Ｖ−Ｖ同期信号の立上りタイミング（時刻１＋）でＣＰ
Ｕ １６は割込みを受け、同時ＫＵ−４同期信号の立上
りでタイマ加による計数開始を許容し一１１ＩＪｍ８の
回転速度をタイマ加の計数値として得るという周波数演
算制御を施す。また、時刻ｔ６でのａｐＵｌ６への割込
みから１サイクル後の次の割込みタイミング（時刻ｔｖ
）までの間に電動機８の誘起電圧の検出信号を検出回路
ＵからバスＵを通して０ＰＵ１６のレジスタに読込み、
この検出データからＰＷＭ制（財）回路ｎに与える電圧
係数を算出する。CP at the rising timing of the V-V synchronization signal (time 1+)
U16 receives the interrupt and performs frequency calculation control to allow the timer addition to start counting at the rise of the simultaneous KU-4 synchronization signal and obtain a rotation speed of 111 IJm8 as the timer addition count. Also, the next interrupt timing (time tv
), the detection signal of the induced voltage of the motor 8 is read from the detection circuit U through the bus U to the register of 0PU16,
From this detection data, a voltage coefficient to be applied to the PWM system circuit n is calculated.
時刻１？のＵ−Ｖ同期信号の立上りでＯＦｏ １１１
Ｋ割込みをかけると共にタイマＩの計数を停止させ、該
タイマ２０には電動機の速度（周波数）に対Ｅした計数
値を得る。この時刻１．でのＯＰＵ １６への割込みＫ
は、０ＰＵ１６はタイマ□□□の計数値から周波数演算
をなし、次回の割込み（時刻ｔａ）にて電動機誘起電圧
と同期したインバータ出力電圧を得るための位相合せ処
理を行なう。時刻１．の割込みにおいて、ＣＰＵ１６１
’ｔそれまでに演算ずみの電圧係数２周波数１位相合せ
データにて同期引き入れ運転に入のリセットを解除し、
電圧制御信号にクツ７ヨン回路２の出力に規制された電
・正係数を得る。この電圧係数と同期投入時Ｋ ＰＷＭ
制御回路ｎにセットした電圧係数が一致した時刻ｔ、に
て、Ｃ！ＰＵ １６ ｉＪ、切換回路２１をそれまでの
誘起電圧から演算し設定されていた電圧係数から変換器
だの出力をＰ’ＷＭ％Ｉｌｌ！１１回路ｎに与える切換
えを施してムＶＲ制御に戻し、以後には停電によセ低下
していた出力電圧、鴫波数設定値を共に停電前の値にム
ＶＲ制御状態で徐々に戻す（時刻ｔ１・）。Time 1? OFo 111 at the rising edge of the UV synchronization signal
A K interrupt is applied and the counting of timer I is stopped, and the timer 20 obtains a count value E corresponding to the speed (frequency) of the motor. This time 1. Interrupt K to OPU 16 at
The 0PU16 calculates the frequency from the count value of the timer □□□, and performs phase matching processing to obtain an inverter output voltage synchronized with the motor induced voltage at the next interrupt (time ta). Time 1. In the interrupt, the CPU 161
't Release the reset of the synchronous pull-in operation using the voltage coefficient 2 frequency 1 phase matching data that has been calculated,
A regulated positive coefficient is obtained from the output of the shoe circuit 2 in the voltage control signal. This voltage coefficient and K PWM at synchronization
At time t, when the voltage coefficients set in control circuit n match, C! PU 16 iJ, the switching circuit 21 is calculated from the induced voltage up to that point, and the output of the converter is P'WM%Ill from the voltage coefficient that has been set. 11 circuit n to return to MuVR control, and after that, both the output voltage and the wave number setting value, which had decreased due to the power outage, are gradually returned to the values before the power outage under MuVR control (time t1・).
従って、本発明によれば、ムｖｉ ｆ１１Ｉ御不可能に
なる瞬時停電時にはインバータ運転を停止し、複電時の
受電電圧及びインバータ直流電圧がインバータ再始動運
転可能な電圧まで復電したときＦＣ［動機がその慣性で
回転状態にあれば、電動様誘起電圧からその周波数１位
相合せをしたモータ拾い上げ処理を施し、最終的にはム
ＹＲ制御に戻して正規の運転状態に戻すため、ムＶＰ制
御不可能の瞬時停電にモータ拾い上げ不可能として装置
停止をして珈電後に再始動するという従来装置に比して
、電動機が持つ慣性による運転継続を可能として生産ラ
インの停止を少なくするし、復電再始動の立上りを早め
ることができる。また、モータ拾い上げ処理では電動機
誘起電圧を波形処理した同期信号により割込みをかけ、
この信号により電動機回転状ｎに同期したインバータ出
力電圧９周波数を演算するため、モータ拾い上げのため
の演算が害鳥になる。Therefore, according to the present invention, the inverter operation is stopped in the event of a momentary power outage that makes it impossible to control the FC [FC[ If the motor is in a rotating state due to its inertia, the motor is picked up by matching its frequency by one phase from the electric-like induced voltage, and finally it is returned to MuYR control to return to the normal operating state, so MuVP control is applied. Compared to conventional equipment, which stops the equipment because the motor cannot be picked up in the event of a momentary power outage, and then restarts the equipment after the power is turned off, the inertia of the motor allows for continued operation, which reduces production line stoppages and improves recovery. It is possible to accelerate the start-up of electric power restart. In addition, during motor pickup processing, an interrupt is generated using a synchronization signal obtained by waveform processing the motor induced voltage.
Since the inverter output voltage 9 frequency synchronized with the motor rotational pattern n is calculated based on this signal, the calculation for picking up the motor becomes a nuisance.
第１図は本発明方法の一実施ガを示す構成図、第２図及
び第３図は第１図における瞬時停−処理方法を示すタイ
ムチャートである。
５・・・インバータ、１１・・・電圧検出器、１２・検
出回路、謔・・・マイクロコンピュータ、加・・・タイ
マ、２１・・・切換回路、ｎ・・・ＰＷＭ ｆｌＩＩＪ
Ｉ［１回路、ｎ・・・電圧制御増幅器、Ｎ・・・操作
パネル、Ｘ・・・クツ７ヨン回路、！・・・リミッタ回
路。FIG. 1 is a block diagram showing one implementation of the method of the present invention, and FIGS. 2 and 3 are time charts showing the instantaneous stop processing method in FIG. 1. 5: Inverter, 11: Voltage detector, 12: Detection circuit, Microcomputer, Addition: Timer, 21: Switching circuit, n: PWM flIIJ
I[1 circuit, n...Voltage control amplifier, N...Operation panel, X...7 circuit,! ...Limiter circuit.
Claims (1)
圧制佃回路を持つインバータにより交流電動機に周波数
と電圧比一定の交流電力を供給する制泡１装置において
、自動電圧制齢不可能になる瞬結停電時に上記マイクロ
コンピュータはインバータのゲートしゃ断で運転停止し
、上記交漬電動持が回転状態にある時間内にインバータ
の再始動運転可能な電圧まで復電すると１＃に該交流電
動機の銹起電圧から位相１周波数及び周波数に合せた電
圧によるインバータの同期引入れ運転を行なうことを特
徴とするモータ拾い上げ方法。In foam control 1 equipment that supplies AC power with a constant frequency and voltage ratio to an AC motor using an inverter with an automatic voltage control circuit that combines a microcomputer and an analog circuit, the above will occur during an instantaneous power outage when automatic voltage control becomes impossible. The microcomputer stops operation when the gate of the inverter is cut off, and when the power is restored to a voltage that allows the inverter to restart operation within the time that the alternating current motor is in the rotating state, the microcomputer changes phase 1 from the rust electromotive voltage of the AC motor to 1#. A method for picking up a motor, characterized by performing synchronous pull-in operation of an inverter using a frequency and a voltage matched to the frequency.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57006547A JPS58127593A (en) | 1982-01-19 | 1982-01-19 | Picking up method for motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57006547A JPS58127593A (en) | 1982-01-19 | 1982-01-19 | Picking up method for motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58127593A true JPS58127593A (en) | 1983-07-29 |
Family
ID=11641352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57006547A Pending JPS58127593A (en) | 1982-01-19 | 1982-01-19 | Picking up method for motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58127593A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013027310A (en) * | 2011-07-20 | 2013-02-04 | Ls Industrial Systems Co Ltd | Apparatus for controlling high-voltage inverter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50143020A (en) * | 1974-05-07 | 1975-11-18 |
-
1982
- 1982-01-19 JP JP57006547A patent/JPS58127593A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50143020A (en) * | 1974-05-07 | 1975-11-18 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013027310A (en) * | 2011-07-20 | 2013-02-04 | Ls Industrial Systems Co Ltd | Apparatus for controlling high-voltage inverter |
| US9093892B2 (en) | 2011-07-20 | 2015-07-28 | Lsis Co., Ltd. | Apparatus and method for controlling medium voltage inverter |
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