JP2008092686A - Dynamic brake device - Google Patents

Dynamic brake device Download PDF

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JP2008092686A
JP2008092686A JP2006271382A JP2006271382A JP2008092686A JP 2008092686 A JP2008092686 A JP 2008092686A JP 2006271382 A JP2006271382 A JP 2006271382A JP 2006271382 A JP2006271382 A JP 2006271382A JP 2008092686 A JP2008092686 A JP 2008092686A
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dynamic brake
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JP4882648B2 (en
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Takeshi Kondo
近藤　　猛
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Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To enable the sure load balance operation of each dynamic brake unit to be performed, and to enable malfunction by noise and the like to be prevented in a dynamic brake device in which the individual control of each unit is performed. <P>SOLUTION: In control devices 8A, 8B installed for each brake unit, ON level detectors 12A, 12B turn on switches 5A, 5B when the detected values of DC voltage detection circuits 11A, 11B exceed an ON level preset value. This ON level present value is gradually increased from this point by ON time counters 13A, 13B and ON level regulators 14A, 14B to turn off the switches when DC voltage detection values drop to the ON level preset value or lower. Thereby, the load balance operation is performed by alternately changing the electric power absorption action of both units. In both control devices, the time for gradually increasing the ON level preset value is set to one divided by the number of brake units. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、電動機の回生電力を抵抗器で吸収するダイナミックブレーキ装置に係り、特に複数のブレーキユニットの並列運転制御に関する。   The present invention relates to a dynamic brake device that absorbs regenerative power of an electric motor with a resistor, and more particularly to parallel operation control of a plurality of brake units.

交流電動機を電圧形インバータで駆動する装置において、電動機からの回生電力を吸収する方式として、ダイナミックブレーキ（ＤＢＲ）方式がある。このダイナミックブレーキ装置は、設備の小型化や電力吸収容量の増大を図るため、複数台（複数ユニット）を並列に設備し、その並列運転を行う方式が多く採用される。   In a device that drives an AC motor with a voltage source inverter, there is a dynamic brake (DBR) method as a method for absorbing regenerative power from the motor. In order to reduce the size of the equipment and increase the power absorption capacity of this dynamic brake device, a method of installing a plurality of units (a plurality of units) in parallel and performing the parallel operation is often employed.

図３は２台のダイナミックブレーキ装置付きインバータ装置の回路構成を示す。インバータ装置の主回路は、交流電力を整流器１と平滑コンデンサ２によって直流電力に変換し、これを直流電源として電圧形インバータ３によって電圧・周波数を制御した交流電力を得、負荷としての電動機（ＩＭ）を駆動する。   FIG. 3 shows the circuit configuration of two inverter devices with dynamic brake devices. The main circuit of the inverter device converts alternating current power into direct current power by the rectifier 1 and the smoothing capacitor 2, obtains alternating current power whose voltage and frequency are controlled by the voltage source inverter 3 using this as a direct current power source, and an electric motor (IM) as a load Drive).

ダイナミックブレーキ装置の主回路は、２台の抵抗器４Ａ、４Ｂにそれぞれ半導体スイッチ５Ａ、５Ｂを直列接続した構成とし、これらをインバータ装置の直流回路に並列接続する。ダイナミックブレーキ装置の制御回路は、インバータ装置の直流電圧が設定電圧Ｖを超えたか否かを検出する直流電圧検出部６と、この検出信号でスイッチ５Ａ、５Ｂをオン／オフ制御するゲート制御部７を設け、電動機の回生運転等によって直流電圧が設定電圧Ｖを超えたときにスイッチ５Ａ、５Ｂをオン制御し、抵抗器４Ａ、４Ｂによって回生電力を熱として吸収すると共にインバータ装置の過電圧トリップを防止する。   The main circuit of the dynamic brake device has a configuration in which semiconductor switches 5A and 5B are connected in series to two resistors 4A and 4B, respectively, and these are connected in parallel to the DC circuit of the inverter device. The control circuit of the dynamic brake device includes a DC voltage detection unit 6 that detects whether or not the DC voltage of the inverter device exceeds the set voltage V, and a gate control unit 7 that controls on / off of the switches 5A and 5B with this detection signal. When the DC voltage exceeds the set voltage V due to regenerative operation of the motor, etc., the switches 5A and 5B are turned on, the regenerative power is absorbed as heat by the resistors 4A and 4B, and the overvoltage trip of the inverter device is prevented. To do.

このようなダイナミックブレーキ装置の制御方式として、直流電圧検出部７における設定電圧Ｖは高い値に設定すると回生電力の吸収が遅れ、低い値に設定すると無駄な電力消費を起こしてしまうため、通常時は高く設定しておき、電動機の停止や減速指令の検出で所定時間だけ下げる方式がある（例えば、特許文献１参照）。   As a control method for such a dynamic brake device, if the set voltage V in the DC voltage detection unit 7 is set to a high value, absorption of regenerative power is delayed, and if it is set to a low value, wasteful power consumption occurs. Is set high and is lowered for a predetermined time when the motor is stopped or a deceleration command is detected (for example, see Patent Document 1).

また、抵抗器４Ａ、４Ｂの保護方式として、抵抗器の温度をセンサで検出または吸収電力から推定し、抵抗器の過熱を防止するものがある（例えば、特許文献２参照）。
特開平０５−０１５１８０号公報 特開２００３−３３３８７３号公報 Further, as a protection method for the resistors 4A and 4B, there is one that prevents the resistor from overheating by detecting the temperature of the resistor with a sensor or estimating the absorbed power (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 05-015180 JP 2003-333873 A

ダイナミックブレーキ装置において、直流電圧検出部６の設定電圧Ｖを可変とする特許文献１の制御方式を適用することでインバータ装置の過電圧トリップを防止できる。また、特許文献２の保護方式を適用して抵抗器の過熱保護ができる。   In the dynamic brake device, an overvoltage trip of the inverter device can be prevented by applying the control method of Patent Document 1 in which the set voltage V of the DC voltage detector 6 is variable. Further, the protection method of Patent Document 2 can be applied to protect the resistor from overheating.

複数ユニット構成にしたダイナミックブレーキ装置に、上記の制御方式および保護方式を適用する場合、ユニット別に直流電圧検出部６とゲート制御部７を設けると、ユニット間の直流電圧検出の誤差や半導体スイッチの制御タイミングのずれにより、各抵抗器での通電期間にアンバランスが生じ、通電期間の長い抵抗器を過熱、焼損させるおそれがある。   When the above control method and protection method are applied to a dynamic brake device having a multi-unit configuration, if the DC voltage detection unit 6 and the gate control unit 7 are provided for each unit, the DC voltage detection error between the units and the semiconductor switch Due to a shift in the control timing, an imbalance occurs in the energization period of each resistor, and the resistor having a long energization period may be overheated or burned.

この対策として、直流電圧検出部６とゲート制御部７の単一構成によって直流電圧検出および両半導体スイッチのゲート制御を並行的に行う構成とする場合、ゲート制御部７と半導体スイッチ５Ａ、５Ｂ間を接続する信号ケーブルが長くなり、インバータ装置の主回路電流などから誘導されるノイズ等によって半導体スイッチ５Ａ、５Ｂを誤ってＯＮ動作させるおそれがある。この場合、抵抗器の過熱や無駄な電力消費を起こしたり、インバータ装置の運転停止を起こしてしまう。   As a countermeasure, when the DC voltage detection unit 6 and the gate control unit 7 are configured to perform DC voltage detection and gate control of both semiconductor switches in parallel, a configuration between the gate control unit 7 and the semiconductor switches 5A and 5B is adopted. As a result, the length of the signal cable for connecting the semiconductor switches 5A and 5B may cause the semiconductor switches 5A and 5B to be erroneously turned on due to noise or the like induced from the main circuit current of the inverter device. In this case, the resistor is overheated or wasteful power is consumed, or the inverter device is stopped.

本発明の目的は、ユニット別に直流電圧検出とゲート制御を行うダイナミックブレーキ装置において、各ユニットの確実な負荷バランス運転ができ、しかもノイズ等による誤動作を防止できるダイナミックブレーキ装置を提供することにある。   SUMMARY OF THE INVENTION An object of the present invention is to provide a dynamic brake device that can perform reliable load balance operation of each unit and prevent malfunction due to noise or the like in a dynamic brake device that performs DC voltage detection and gate control for each unit.

本発明は、前記の課題を解決するため、あるユニットが電力吸収動作を開始したときにそのＯＮレベル設定値を漸次増大させることで他のユニットのＯＮレベル設定値よりも高くし、これによりＯＮレベル設定値が低い他のユニットが電力吸収動作を開始してそのＯＮレベル設定値を漸次増大させるという、各ユニットによる電力吸収動作の順次切り替えで負荷バランス運転するようにしたもので、以下の構成を特徴とする。   In order to solve the above-mentioned problem, the present invention gradually increases the ON level setting value of a unit when a unit starts power absorption operation, thereby making it higher than the ON level setting value of other units. The load balance operation is performed by sequentially switching the power absorption operation by each unit, in which other units with low level setting values start power absorption operation and gradually increase their ON level setting values. It is characterized by.

（１）直流回路に並列接続され、抵抗器とスイッチの直列接続構成にした複数のブレーキユニットの並列運転制御によって電動機の回生電力を吸収し、前記直流回路の直流電圧検出と前記スイッチのオン制御を各ブレーキユニット別に行うダイナミックブレーキ装置であって、
前記各ブレーキユニット別に設けた各制御部は、前記直流電圧検出値がＯＮレベル設定値を越えたときに前記スイッチをオン制御すると共に該ＯＮレベル設定値を漸次増大させ、該直流電圧検出値が該ＯＮレベル設定値以下になったときに前記スイッチをオフ制御する制御回路を備えたことを特徴とする。 (1) The regenerative power of the motor is absorbed by the parallel operation control of a plurality of brake units connected in parallel to the DC circuit, and the resistor and the switch are connected in series, so that the DC voltage of the DC circuit is detected and the switch is turned on. Is a dynamic brake device that performs each brake unit separately,
Each control unit provided for each brake unit controls to turn on the switch when the DC voltage detection value exceeds the ON level setting value and gradually increases the ON level setting value. A control circuit for turning off the switch when the ON level set value or less is provided is provided.

（２）前記各制御部は、前記ＯＮレベル設定値を漸次増大させる時間は、ブレーキユニット台数分の１とすることを特徴とする。   (2) Each of the control units is characterized in that the time for gradually increasing the ON level set value is set to 1 / the number of brake units.

以上のとおり、本発明によれば、ユニット別に直流電圧検出とゲート制御を行うダイナミックブレーキ装置において、あるユニットが電力吸収動作を開始したときにそのＯＮレベル設定値を漸次増大させることで他のユニットのＯＮレベル設定値よりも高くし、これによりＯＮレベル設定値が低い他のユニットが電力吸収動作を開始してそのＯＮレベル設定値を漸次増大させるという、各ユニットによる電力吸収動作の順次切り替え制御を行うため、各ユニットの確実な負荷バランス運転ができ、しかもノイズ等による誤動作を防止できる効果がある。   As described above, according to the present invention, in a dynamic brake device that performs DC voltage detection and gate control for each unit, when a unit starts power absorption operation, the ON level set value is gradually increased to increase the other unit. Sequential switching control of the power absorption operation by each unit, in which another unit with a lower ON level setting value starts a power absorption operation and gradually increases the ON level setting value. Therefore, there is an effect that each unit can be reliably load-balanced and can prevent malfunction due to noise or the like.

図１は、本発明の実施形態を示すダイナミックブレーキ装置の構成図であり、図３と異なる部分は、ダイナミックブレーキ装置の制御回路にある。   FIG. 1 is a configuration diagram of a dynamic brake device showing an embodiment of the present invention, and a different part from FIG. 3 is a control circuit of the dynamic brake device.

この制御回路は、２台のユニット別にした制御部８Ａ、８Ｂを設け、半導体スイッチ５Ａ、５Ｂを個別に制御する。制御部８Ａおよび８Ｂは、直流電圧検出回路１１Ａ、１１Ｂと、ＯＮレベル検出器１２Ａ、１２Ｂと、ＯＮ時間カウンタ１３Ａ、１３Ｂと、ＯＮレベル調整器１４Ａ、１４Ｂと、ゲート出力回路１５Ａ、１５Ｂで構成する。   This control circuit is provided with two control units 8A and 8B for each unit, and individually controls the semiconductor switches 5A and 5B. The control units 8A and 8B include DC voltage detection circuits 11A and 11B, ON level detectors 12A and 12B, ON time counters 13A and 13B, ON level adjusters 14A and 14B, and gate output circuits 15A and 15B. To do.

直流電圧検出回路１１Ａ、１１Ｂはインバータ装置の直流電圧を検出する。ＯＮレベル検出器１２Ａ、１２Ｂは、直流電圧の検出値がＯＮレベル設定値を超えているか否かに応じたＯＮ／ＯＦＦゲート信号を発生する。ＯＮ時間カウンタ１３Ａ、１３Ｂは、ＯＮレベル検出器１２Ａ、１２ＢがＯＮゲート信号を発生した時点で初期リセットした後に時間カウントを行う。   The DC voltage detection circuits 11A and 11B detect the DC voltage of the inverter device. The ON level detectors 12A and 12B generate ON / OFF gate signals according to whether or not the detected value of the DC voltage exceeds the ON level set value. The ON time counters 13A and 13B perform time counting after an initial reset when the ON level detectors 12A and 12B generate an ON gate signal.

ＯＮレベル調整器１４Ａ、１４Ｂは、ＯＮレベル検出器１２Ａ、１２ＢのＯＮレベル設定値を調整するものであり、ＯＮ時間カウンタ１３Ａ、１３Ｂが時間カウントを開始した時点では予め設定した下限電圧とし、この電圧から所定の関数特性（例えば、時間に対して一定の傾斜で増大する一次関数）を有して上限電圧まで漸次増大させる。また、ＯＮレベル調整器１４Ａ、１４Ｂは、ＯＮ時間カウンタ１３Ａ、１３Ｂが時間カウントを停止したときは、この時間カウントの２倍の時間だけＯＮレベル設定値を漸次増大させ、他方のユニットのＯＮレベル設定値よりも高い値を確保すると共にＯＮレベル検出動作の安定化を図る。   The ON level adjusters 14A and 14B are for adjusting the ON level setting values of the ON level detectors 12A and 12B. When the ON time counters 13A and 13B start counting time, the lower limit voltage is set in advance. The voltage is gradually increased to the upper limit voltage with a predetermined function characteristic (for example, a linear function increasing at a constant slope with respect to time). Further, when the ON time counters 13A and 13B stop the time count, the ON level adjusters 14A and 14B gradually increase the ON level set value by a time twice as long as this time count, and the ON level of the other unit. A value higher than the set value is secured and the ON level detection operation is stabilized.

ゲート出力回路１５Ａ、１５Ｂは、ＯＮレベル検出器１２Ａ、１２Ｂに得るオン・オフ検出信号に応じて、半導体スイッチ５Ａ、５Ｂをそれぞれオン・オフ制御する。   The gate output circuits 15A and 15B perform on / off control of the semiconductor switches 5A and 5B, respectively, according to the on / off detection signals obtained from the ON level detectors 12A and 12B.

以上の構成になるダイナミックブレーキ装置の制御動作を説明する。まず、インバータ装置の運転中において、負荷側からの回生電力により直流電圧が上昇した場合も含めて、この直流電圧を直流電圧検出回路１１Ａ、１１Ｂが検出する。この検出電圧がＯＮレベル検出器１２Ａ、１２Ｂに設定される基準値（初期ＯＮレベル設定値）以上になった場合、ゲート出力回路１５Ａ、１５Ｂから半導体スイッチ５Ａ、５Ｂにオンゲート信号を出力し、抵抗器４Ａ、４Ｂによる回生電力の吸収を開始する。   The control operation of the dynamic brake device having the above configuration will be described. First, during operation of the inverter device, the DC voltage detection circuits 11A and 11B detect this DC voltage, including the case where the DC voltage rises due to regenerative power from the load side. When this detection voltage becomes equal to or higher than a reference value (initial ON level setting value) set in the ON level detectors 12A and 12B, an on-gate signal is output from the gate output circuits 15A and 15B to the semiconductor switches 5A and 5B, and the resistance Absorption of regenerative power by the devices 4A and 4B is started.

この制御において、ＯＮレベル検出器１２Ａ、１２Ｂがオンゲート信号を発生した時点から、ＯＮ時間カウンタ１３Ａ、１３Ｂが時間カウントを開始し、ＯＮレベル調整器１４Ａ、１４ＢがＯＮレベル検出器１２Ａ、１２ＢのＯＮレベル設定値を時間と共に増大させ、ＯＮレベル設定値が直流電圧検出値以上になったときに、ＯＮレベル検出器１２Ａ、１２Ｂがオフゲート信号を発生し、ゲート出力回路１５Ａ、１５Ｂが半導体スイッチ５Ａ、５Ｂをオフ制御し、抵抗器４Ａ、４Ｂによる回生電力吸収を停止する。   In this control, the ON time counters 13A and 13B start counting time from the time when the ON level detectors 12A and 12B generate the ON gate signal, and the ON level adjusters 14A and 14B turn ON the ON level detectors 12A and 12B. When the level set value is increased with time, and the ON level set value becomes equal to or greater than the DC voltage detection value, the ON level detectors 12A and 12B generate an off gate signal, and the gate output circuits 15A and 15B receive the semiconductor switch 5A. 5B is turned off, and regenerative power absorption by the resistors 4A and 4B is stopped.

したがって、直流電圧がＯＮレベル設定値を超えたときの制御動作は、図２に示すように、両ユニットが交互に半導体スイッチ５Ａ、５Ｂのオン・オフ制御を繰り返し、回生電力が大きい場合には両ユニットがオン制御を連続させて直流電圧の上昇を抑制する。   Therefore, the control operation when the DC voltage exceeds the ON level set value is as shown in FIG. 2, when both units alternately repeat the on / off control of the semiconductor switches 5A and 5B, and the regenerative power is large. Both units keep on-control to suppress the DC voltage rise.

図２は、直流電圧上昇を制御部８Ａが先に検出して抵抗器４Ａによる電力吸収を開始した場合を示し、制御部８Ｂでは抵抗器４Ａによる電力吸収の停止で直流電圧が上昇し始めると抵抗器４Ｂにより電力吸収を開始する。この抵抗器４Ｂによる電力吸収の停止では抵抗器４Ａによる電力吸収を開始するという交互の電力吸収と停止が繰り返される。   FIG. 2 shows a case where the control unit 8A first detects an increase in DC voltage and starts power absorption by the resistor 4A. When the control unit 8B stops the power absorption by the resistor 4A, the DC voltage starts to increase. Power absorption is started by the resistor 4B. In the stop of power absorption by the resistor 4B, alternating power absorption and stop of starting power absorption by the resistor 4A are repeated.

したがって、ＯＮレベル検出器１２Ａ、１２Ｂでは、そのＯＮレベル設定値にずれがある場合においても、直流電圧上昇を先に検出したＯＮレベル検出器では電力吸収動作を開始すると共にそのＯＮレベル設定値が増大するＯＮレベル調整がなされ、他方のＯＮレベル検出器により直流電圧上昇を検出して電力吸収制御ができ、両ユニットの負荷をバランスさせた運転制御を得ることができる。また、直流電圧検出回路１１Ａ、１１Ｂの検出信号にノイズ等が重畳している場合にも、両ユニットが交互に動作して負荷をバランスさせた運転制御を得ることができる。また、ＯＮレベルの初期値（基準値）を高く設定した場合にも両ユニットの協働で回生電力を速やかに吸収でき、ノイズ等によって各ユニットが誤動作するのを防止して無駄な電力消費も無くすことができる。   Therefore, in the ON level detectors 12A and 12B, even when the ON level set value has a deviation, the ON level detector that detects the DC voltage rise first starts the power absorption operation and the ON level set value is Increased ON level adjustment is performed, and the other ON level detector can detect a DC voltage rise to perform power absorption control, thereby obtaining operation control in which the loads of both units are balanced. Further, even when noise or the like is superimposed on the detection signals of the DC voltage detection circuits 11A and 11B, it is possible to obtain operation control in which both units operate alternately to balance the load. Also, even when the ON level initial value (reference value) is set high, regenerative power can be quickly absorbed by the cooperation of both units, preventing malfunction of each unit due to noise, etc., and wasteful power consumption. It can be lost.

なお、実施形態では、２台のダイナミックブレーキユニット構成とする場合を示すが、３台以上のユニット構成に適用して同等の作用効果を得ることができる。この場合、例えば３台のユニット構成では、それぞれのユニットによる電力吸収時間と停止時間の比は３倍にし、ＯＮレベル設定値を漸次増大させる時間をブレーキユニット台数分の１とすることで、各ユニットによる電力吸収動作を順次切り替えた負荷バランス動作を得ることができる。   In addition, although the case where it is set as the structure of two dynamic brake units is shown in embodiment, it can apply to the unit structure of three or more units, and can obtain an equivalent effect. In this case, for example, in the configuration of three units, the ratio of the power absorption time and the stop time by each unit is tripled, and the time for gradually increasing the ON level setting value is 1 / number of brake units, It is possible to obtain a load balance operation in which the power absorption operation by the unit is sequentially switched.

また、実施形態ではインバータ装置の直流回路にダイナミックブレーキ装置を設けた場合を示すが、インバータ装置とは分離した別置き構成や交流電動機の専用のダイナミックブレーキ装置に適用することができる。   Moreover, although the case where a dynamic brake device is provided in the DC circuit of the inverter device is shown in the embodiment, the present invention can be applied to a separate configuration separated from the inverter device or a dedicated dynamic brake device for an AC motor.

本発明の実施形態を示すダイナミックブレーキ装置の構成図。The block diagram of the dynamic brake device which shows embodiment of this invention. 実施形態における制御波形図。The control waveform figure in embodiment. ２台のダイナミックブレーキ装置付きインバータ装置の回路構成図。The circuit block diagram of two inverter apparatuses with a dynamic brake apparatus.

符号の説明Explanation of symbols

４Ａ、４Ｂ 抵抗器
５Ａ、５Ｂ 半導体スイッチ
８Ａ、８Ｂ 制御部
１１Ａ、１１Ｂ 直流電圧検出器
１２Ａ、１２Ｂ ＯＮレベル検出器
１３Ａ、１３Ｂ ＯＮ時間カウンタ
１４Ａ、１４Ｂ ＯＮレベル調整器
１５Ａ、１５Ｂ ゲート出力回路 4A, 4B Resistor 5A, 5B Semiconductor switch 8A, 8B Controller 11A, 11B DC voltage detector 12A, 12B ON level detector 13A, 13B ON time counter 14A, 14B ON level adjuster 15A, 15B Gate output circuit

Claims (2)

直流回路に並列接続され、抵抗器とスイッチの直列接続構成にした複数のブレーキユニットの並列運転制御によって電動機の回生電力を吸収し、前記直流回路の直流電圧検出と前記スイッチのオン制御を各ブレーキユニット別に行うダイナミックブレーキ装置であって、
前記各ブレーキユニット別に設けた各制御部は、前記直流電圧検出値がＯＮレベル設定値を越えたときに前記スイッチをオン制御すると共に該ＯＮレベル設定値を漸次増大させ、該直流電圧検出値が該ＯＮレベル設定値以下になったときに前記スイッチをオフ制御する制御回路を備えたことを特徴とするダイナミックブレーキ装置。 The regenerative power of the motor is absorbed by the parallel operation control of a plurality of brake units connected in parallel to the DC circuit, and the resistor and the switch are connected in series, and the DC voltage detection of the DC circuit and the ON control of the switch are controlled by each brake A dynamic brake device for each unit,
Each control unit provided for each brake unit controls to turn on the switch when the DC voltage detection value exceeds the ON level setting value and gradually increases the ON level setting value. A dynamic brake device comprising a control circuit for controlling the switch to be turned off when the ON level is lower than a set value. 前記各制御部は、前記ＯＮレベル設定値を漸次増大させる時間は、ブレーキユニット台数分の１とすることを特徴とする請求項１に記載のダイナミックブレーキ装置。   2. The dynamic brake device according to claim 1, wherein each of the control units sets the time for gradually increasing the ON level setting value to 1 / the number of brake units.
JP2006271382A 2006-10-03 2006-10-03 Dynamic brake device Active JP4882648B2 (en)

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
CN103684190A (en) * 2012-09-10 2014-03-26 发那科株式会社 Motor control apparatus including at least two resistance discharge units
US20220149758A1 (en) * 2019-02-07 2022-05-12 Sew-Eurodrive Gmbh & Co. Kg Drive system with inverter and electric motor, and method for operating a drive system

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JPS59127584A (en) * 1983-01-11 1984-07-23 Hitachi Ltd Regenerative brake unit
JPS633666A (en) * 1986-06-23 1988-01-08 Mitsubishi Electric Corp Brake device of ac motor
JPH0391088A (en) * 1989-09-04 1991-04-16 Canon Inc Image processor
JPH11308881A (en) * 1998-04-24 1999-11-05 Toyo Electric Mfg Co Ltd Over-voltage control apparatus

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Publication number Priority date Publication date Assignee Title
JPS59127584A (en) * 1983-01-11 1984-07-23 Hitachi Ltd Regenerative brake unit
JPS633666A (en) * 1986-06-23 1988-01-08 Mitsubishi Electric Corp Brake device of ac motor
JPH0391088A (en) * 1989-09-04 1991-04-16 Canon Inc Image processor
JPH11308881A (en) * 1998-04-24 1999-11-05 Toyo Electric Mfg Co Ltd Over-voltage control apparatus

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103684190A (en) * 2012-09-10 2014-03-26 发那科株式会社 Motor control apparatus including at least two resistance discharge units
CN105141193A (en) * 2012-09-10 2015-12-09 发那科株式会社 Motor control apparatus including at least two resistance discharge units
US20220149758A1 (en) * 2019-02-07 2022-05-12 Sew-Eurodrive Gmbh & Co. Kg Drive system with inverter and electric motor, and method for operating a drive system

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