JPH02223396A - Power device for driving three-phase induction motor - Google Patents
Power device for driving three-phase induction motorInfo
- Publication number
- JPH02223396A JPH02223396A JP4218589A JP4218589A JPH02223396A JP H02223396 A JPH02223396 A JP H02223396A JP 4218589 A JP4218589 A JP 4218589A JP 4218589 A JP4218589 A JP 4218589A JP H02223396 A JPH02223396 A JP H02223396A
- Authority
- JP
- Japan
- Prior art keywords
- induction motor
- phase induction
- circuit
- braking
- power supply
- 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
- 230000006698 induction Effects 0.000 title claims abstract description 75
- 230000001172 regenerating effect Effects 0.000 claims abstract description 20
- 230000003247 decreasing effect Effects 0.000 claims abstract description 5
- 230000007423 decrease Effects 0.000 abstract description 9
- 238000010586 diagram Methods 0.000 description 7
- 239000003990 capacitor Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000010248 power generation Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
Landscapes
- Stopping Of Electric Motors (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は三相誘導電動機駆動用電源装置に関し、特にタ
ーボ分子ポンプ駆動用三相誘導電動機の減速停止に好適
な電源装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply device for driving a three-phase induction motor, and more particularly to a power supply device suitable for decelerating and stopping a three-phase induction motor for driving a turbomolecular pump.
従来、三相誘導電動機駆動用電源装置には第６図に示す
ような構成のＰＡＭ（パルス振幅変調）方式と、第７図
に示すような構成のＰＷＭ（パルス幅変調）方式がある
。Conventionally, power supplies for driving three-phase induction motors include a PAM (Pulse Amplitude Modulation) system having a configuration as shown in FIG. 6, and a PWM (Pulse Width Modulation) system having a configuration as shown in FIG.
ＰＡＭ方式は第６図に示すように、整流回路５１、チョ
ッパ回路５２、インバータ回路５３、チョッパ駆動回路
５４、電圧監視回路５５、回生電力放電回路５６、位相
発生器５７、インバータ制御・警報回路５８及び発振器
５９等を具備し、整流回路５１の出力をチョッパ回路５
２を通して所定の電圧に制御し、インバータ回路５３に
供給し、該インバータ回路５３において位相発生器５７
からの信号によりスイッチング素子Ｑ、−Ｑ、を０°Ｎ
−０ＦＦ制御し、所定電圧及び周波数の交流に変換し、
三相誘導電動機６０に供給′し、該三相誘導電動機６０
を駆動している。As shown in FIG. 6, the PAM system includes a rectifier circuit 51, a chopper circuit 52, an inverter circuit 53, a chopper drive circuit 54, a voltage monitoring circuit 55, a regenerative power discharge circuit 56, a phase generator 57, and an inverter control/alarm circuit 58. and an oscillator 59, etc., and the output of the rectifier circuit 51 is connected to the chopper circuit 5.
2 to a predetermined voltage and supply it to an inverter circuit 53, and a phase generator 57 in the inverter circuit 53.
The switching elements Q, -Q, are set to 0°N by the signal from
-0FF control, converting to alternating current with a predetermined voltage and frequency,
supply to a three-phase induction motor 60;
is driving.
ＰＷＭ方式は第７図に示すように構成される、同図にお
いて、第６図と同一符号を付した部分は同−又は相当部
分を示す、６１はパルス幅変調／位相発生器である。整
流回路５１の出力はインバータ回路５３に供給し、該イ
ンバータ回路５３においてパルス幅変調／位相発生器６
１からの信号によりスイッチング素子Ｑ、−Ｑ、をＯＮ
・ＯＦＦ制御し、所定電圧及び周波数の交流に変換し、
三相誘導電動機６０に供給し、該三相誘導電動機６０を
駆動している。The PWM system is constructed as shown in FIG. 7. In the same figure, parts given the same reference numerals as in FIG. 6 indicate the same or equivalent parts, and 61 is a pulse width modulation/phase generator. The output of the rectifier circuit 51 is supplied to an inverter circuit 53 in which a pulse width modulation/phase generator 6
Switching elements Q, -Q, are turned on by the signal from 1.
・Control OFF and convert to AC with a predetermined voltage and frequency,
It is supplied to a three-phase induction motor 60 and drives the three-phase induction motor 60.
上記構成の三相誘導電動機駆動用電源装置において、三
相誘導電動機６０を減速する場合、第８図（ａ）に示す
ように時刻ｔ、で減速指令Ｂが出力されると、インバー
タ回路５３の出力周波数ｆ、出力電圧Ｖは第８図（ｂ）
、（ｃ）に示すように定格値より徐々に減少する。これ
により三相誘導電動機６０のロータの回転数は第８ＶＩ
Ａ（ｅ）に示すように、時刻ｔ、から徐々に減少してい
く、この減少は慣性の大小により図示するように変化す
る。三相誘導電動機６０の減速に従い電動機の発電作用
により、発電された交流はダイオードＤ ｔ ”’ Ｄ
ａを通りコンデンサＣ１に蓄電される。In the three-phase induction motor drive power supply device having the above configuration, when decelerating the three-phase induction motor 60, when the deceleration command B is output at time t as shown in FIG. 8(a), the inverter circuit 53 The output frequency f and output voltage V are shown in Figure 8(b)
, as shown in (c), gradually decreases from the rated value. As a result, the rotational speed of the rotor of the three-phase induction motor 60 is set to 8th VI.
As shown in A(e), it gradually decreases from time t, and this decrease changes as shown in the figure, depending on the magnitude of inertia. As the three-phase induction motor 60 decelerates, the generated alternating current flows through the diode D t "' D due to the power generation action of the motor.
a and is stored in the capacitor C1.
このコンデンサＣ３の電圧を電圧を親回路５５で監視し
、所定値を越すとスイッチング素子Ｑ、をＯＮし、抵抗
器Ｒにより消費させる。このように三相誘導電動機６０
の発電電力を吸収することにより三相誘導電動機６０に
制動がかかり減速する。この種の電源装置においてはそ
の周波数範囲は０．０２ｆ’−ｆ’（但し、ｆは最高周
波数）となるため周波数が下限周波数になる点、即ち時
刻ｔ、においてインバータの出力は零となり回生制動が
かからなくなり、三相誘導電動機６０のロータはフリー
ラン状態となる。The voltage of this capacitor C3 is monitored by the parent circuit 55, and when it exceeds a predetermined value, the switching element Q is turned on and the voltage is consumed by the resistor R. In this way, the three-phase induction motor 60
By absorbing the generated power, the three-phase induction motor 60 is braked and decelerated. In this type of power supply device, the frequency range is 0.02f'-f' (where f is the highest frequency), so at the point where the frequency reaches the lower limit frequency, that is, at time t, the inverter output becomes zero and regenerative braking occurs. is no longer applied, and the rotor of the three-phase induction motor 60 enters a free running state.
しかしながら、上記構成の三相誘導電動機駆動用電源装
置において、ロータのフリーラン状態から停止までの間
に長い時間を必要とするという問題があった。特に三相
誘導電動機をターボ分子ポンプの駆動用に用いる場合、
高真空状態ではロータが停止するまでに長い時間を必要
とする。However, in the power supply device for driving a three-phase induction motor having the above configuration, there is a problem in that a long time is required between the rotor's free running state and its stop. Especially when using a three-phase induction motor to drive a turbomolecular pump,
In high vacuum conditions, it takes a long time for the rotor to stop.
本発明は上述の点に鑑みてなされたもので、上記問題点
を除去し、上記三相誘導電動機駆動用電源装置の構成部
分の一部を利用し、低中速回転から完全停止まで制動を
かけ減速が可能となるように構成した三相誘導電動機駆
動用電源装置を提供することにある。The present invention has been made in view of the above points, and eliminates the above problems and utilizes a part of the component of the power supply device for driving the three-phase induction motor to achieve braking from low to medium speed rotation to complete stop. It is an object of the present invention to provide a power supply device for driving a three-phase induction motor that is configured to enable overlapping deceleration.
上記課題を解決するため本発明は、インバータ回路及び
回生制動回路を具備１、該インバータ回路からの三相交
流を三相誘導電動機に供給する三相誘導電動機駆動用電
源装置において、インバータ回路に三相誘導電動機を停
止する際、回生制動回路により制動をかけ該回生制動回
路の制動作用が停止或いは小きくなった後フリーラン状
態から完全停止まで直流制動をかける直流切り替え回路
を設けると共に、該直流制動時に過大電流が流れること
を防止する電流制限回路を設けたことを特徴とする。In order to solve the above problems, the present invention provides a three-phase induction motor driving power supply device that is equipped with an inverter circuit and a regenerative braking circuit, and supplies three-phase AC from the inverter circuit to a three-phase induction motor. When stopping the phase induction motor, a regenerative braking circuit applies braking, and after the braking action of the regenerative braking circuit has stopped or decreased, a DC switching circuit is provided that applies DC braking from a coasting state to a complete stop. It is characterized by the provision of a current limiting circuit that prevents excessive current from flowing during braking.
また、直流制動の直流電源をＰＡＭ方式の場合はチョッ
パ回路により構成し、そしてＰＷＭ方式の場合はインバ
ータ回路とパルス幅変調回路とにより構成すると共に、
三相誘導電動機への交流の供紗と直流の供給の切り替え
を前記インバータを構成するスイッチグ素子のＯＮ・Ｏ
ＦＦにより行なうことを特徴とする。In addition, the DC power supply for DC braking is configured by a chopper circuit in the case of the PAM system, and an inverter circuit and a pulse width modulation circuit in the case of the PWM system, and
Switching between supplying alternating current and direct current to the three-phase induction motor is performed by turning on and off the switching elements that constitute the inverter.
It is characterized by being carried out by FF.
三相誘導電動機駆動用電源装置を上記の如く構成するこ
とにより、回生制動回路の制動作用が停止或いは小さく
なった後フリーラン状態から完全停止まで直流制動をか
けるので、フリーラン状態から完全停止までが極めて短
時間となる。By configuring the power supply device for driving a three-phase induction motor as described above, DC braking is applied from a coasting state to a complete stop after the braking action of the regenerative braking circuit has stopped or decreased. is extremely short.
以下、本発明の一実施例を図面に基づいて説明する。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図は本発明に係るＰＡＭ方式を用いた三相誘導電動
機駆動用電源装置の構成を示す図である。図示するよう
に、電源装置は整流回路１１、チョッパ回路１２、イン
バータ回路１３、チョッパ駆動回路１４、電圧監視回路
１５、回生電力放電回路１６、位相発生器１７、電圧切
替回路１８、発振器１９、インバータ制御・警報回路２
０及び直流切替回路２１を具備する。FIG. 1 is a diagram showing the configuration of a power supply device for driving a three-phase induction motor using the PAM method according to the present invention. As shown in the figure, the power supply device includes a rectifier circuit 11, a chopper circuit 12, an inverter circuit 13, a chopper drive circuit 14, a voltage monitoring circuit 15, a regenerative power discharge circuit 16, a phase generator 17, a voltage switching circuit 18, an oscillator 19, and an inverter. Control/alarm circuit 2
0 and a DC switching circuit 21.
整流回路１１の出力をチョッパ回路１２を通して所定の
電圧に制御し、インバータ回路１３に供給し、該インバ
ータ回路１３において位相発生器１７からの信号により
スイッチング素子Ｑ 、 −Ｑ。The output of the rectifier circuit 11 is controlled to a predetermined voltage through a chopper circuit 12, and is supplied to an inverter circuit 13. In the inverter circuit 13, a signal from a phase generator 17 is used to control switching elements Q1, -Q.
をＯＮ・ＯＦＦ制御し、所定電圧及び周波数の交流に変
換し、三相誘導電動機２２に供給し、該三相誘導電動機
２２を駆動している。なお、Ｃ０゜Ｃ１は平滑コンデン
サ、Ｌは平滑コイル、Ｒは抵抗器、Ｑ、はスイッチング
素子である。is controlled ON/OFF, converted into alternating current of a predetermined voltage and frequency, and supplied to the three-phase induction motor 22 to drive the three-phase induction motor 22. Note that C0°C1 is a smoothing capacitor, L is a smoothing coil, R is a resistor, and Q is a switching element.
上記構成の三相誘導電動機駆動用電源装置において、三
相誘導電動機２２の回転数を制御するためにインバータ
回路１３の出力周波数と出力電圧を変化させて昇速運転
や減速運転を行なう、そして減速運転時において、電源
装置の出力周波数を下げると三相誘導電動機２２の発電
作用により、端子ｃ −ｅ及びダイオードＤ、〜Ｄ、を
経てコンデンサＣ２に流れ込み、端子ａ−ｂ間の電圧が
上昇するため電圧監視回路１５がこれを検出し回生電力
放電回路１６とスイッチング素子Ｑ、を動作させ抵抗器
Ｒにより消費させ、三相誘導電動機２２に発電制動をか
ける点は上記第６図の電源装置と同じである。In the power supply device for driving a three-phase induction motor having the above configuration, in order to control the rotation speed of the three-phase induction motor 22, the output frequency and output voltage of the inverter circuit 13 are changed to perform speed-up operation, deceleration operation, and deceleration operation. During operation, when the output frequency of the power supply device is lowered, the electric power generated by the three-phase induction motor 22 flows into the capacitor C2 via terminals c-e and diodes D, ~D, and the voltage between terminals a and b increases. Therefore, the voltage monitoring circuit 15 detects this, operates the regenerative power discharging circuit 16 and the switching element Q, causes the power to be consumed by the resistor R, and applies dynamic braking to the three-phase induction motor 22, which is different from the power supply device shown in FIG. It's the same.
このように、三相誘導電動機２２の発電電力を吸収する
ことでロータに制動力が働き減速するが低速、中速回転
になると発電電力が低下し、ロータ制動力も低下するの
で特にすべりが大きい場合は先にインバータの出力が零
になりフリーランとなってしまう。そこでインバータ制
御・警報回路２０は、直流切替回路２１に直流切り替え
指令を出力し、直流切替回路２１はスイッチング素子Ｑ
１〜Ｑ、の内いずれか、例えばスイッチング素子Ｑ１、
Ｑ４を導通させこれを保持することにより、三相誘導電
動機２２のＵ、Ｖ間に直流電流を流し、そのフィル部を
電磁制動部として作動させる。この直流電磁制動力は中
速、低速域で増大する特徴を有しているからロータに強
い制動力が作用する。また、この直流制動時に三相誘導
電動機２２に過大電流が流れ込むのを防止するため、イ
ンバータ制御・警報回路２０は直流切替回路２１に直流
切り替え指令を出力すると同時に電圧切替回路１８にも
この指令を出力し、電圧切替回路１８はチョッパ駆動回
路１４に電圧切り替え指令を出力し、チョッパ回路１２
の出力電圧を三相誘導電動機２２に過大電流が流れ込ま
ない範囲の所定電圧に制御する。In this way, by absorbing the power generated by the three-phase induction motor 22, a braking force is applied to the rotor to decelerate it, but when the rotor rotates at low or medium speeds, the generated power decreases and the rotor braking force also decreases, causing particularly large slippage. In this case, the inverter's output becomes zero first, resulting in free running. Therefore, the inverter control/alarm circuit 20 outputs a DC switching command to the DC switching circuit 21, and the DC switching circuit 21 uses the switching element Q.
1 to Q, for example, the switching element Q1,
By making Q4 conductive and maintaining it, a direct current is passed between U and V of the three-phase induction motor 22, and the fill portion thereof is operated as an electromagnetic braking portion. This DC electromagnetic braking force has the characteristic of increasing in the medium and low speed ranges, so a strong braking force acts on the rotor. Additionally, in order to prevent excessive current from flowing into the three-phase induction motor 22 during this DC braking, the inverter control/alarm circuit 20 outputs a DC switching command to the DC switching circuit 21 and at the same time also outputs this command to the voltage switching circuit 18. The voltage switching circuit 18 outputs a voltage switching command to the chopper drive circuit 14, and the voltage switching circuit 18 outputs a voltage switching command to the chopper drive circuit 14.
The output voltage of the three-phase induction motor 22 is controlled to a predetermined voltage within a range in which excessive current does not flow into the three-phase induction motor 22.
第２図は上記構成の三相誘導電動機駆動用電源装置の減
速動作を説明するタイミングチャートである。三相誘導
電動機２２を減速する場合、第２図（ａ）に示すように
時刻ｔ、で減速指令Ｓが出力されると、インバータ回路
１３の出力周波数ｒ、出力電圧Ｖは第２図（ｂ）、（Ｃ
）に示すよように定格値より徐々に減少する。三相誘導
電動機２２の減速に従い電動機の発電作用により、発電
された交流はダイオードＤ Ｉ”’ Ｄ ｓを通りコン
デンサＣ１に流れ込む。このコンデンサＣ１の電圧を電
圧監視回路１５で監視し、所定値を越すと回生電力放電
回路１６から第２図（ｄ）に示すように回生制動指令が
出力される。この回生制動指令によりスイッチング素子
ＱｙがＯＮとなる。これより三相誘導電動機２２の発電
電力が抵抗器Ｒにより消費され三相誘導電動機２２に回
生制動がかかりロータの回転数が第２図（ｆ’）に示す
ように減速する。ロータの速度が所定以下に減速きれ回
生制動による制動作用が停止又は制動力がノドさくなり
、ロータがフリーラン状態になる時点ｔ、で直流切替回
路２１かも位相発生器１７に直流切り替え信号、即ち、
第２図（ｅ）に示す直流制動指令が出力され、インバー
タ回路１３を構成するスイッチング素子Ｑ１〜Ｑ、の内
いずれか、例えばスイッチング素子Ｑ、、Ｑ、を導通さ
せこれを保持することにより三相誘導電動機２２に直流
電流を流し直流制動をかける。これにより三相誘導電動
機２２のロータは第２図（ｆ’）に示すように時刻ｔ、
から急激に減速許せ、短時間の間に停止する。FIG. 2 is a timing chart illustrating the deceleration operation of the three-phase induction motor drive power supply device configured as described above. When decelerating the three-phase induction motor 22, when the deceleration command S is output at time t as shown in FIG. 2(a), the output frequency r and output voltage V of the inverter circuit 13 will be ), (C
), it gradually decreases from the rated value. As the three-phase induction motor 22 decelerates, the generated alternating current flows into the capacitor C1 through the diode DI'''Ds. When the regenerative braking command is exceeded, the regenerative braking command is output from the regenerative power discharge circuit 16 as shown in FIG. The power is consumed by the resistor R, and regenerative braking is applied to the three-phase induction motor 22, reducing the rotational speed of the rotor as shown in FIG. At time t when the stop or braking force becomes low and the rotor is in a free running state, the DC switching circuit 21 also sends a DC switching signal to the phase generator 17, that is,
The direct current braking command shown in FIG. DC current is applied to the phase induction motor 22 to apply DC braking. As a result, the rotor of the three-phase induction motor 22 moves at time t, as shown in FIG. 2(f').
The vehicle suddenly decelerates and comes to a stop within a short period of time.
上記実施例によれば、三相誘導電動機２２が減速し、電
動機の発電作用による回生制動が作用しなくなり、ロー
タがフリーラン状態に′なったら、直流制動を既存のチ
ョッパ回路１２及びインバータ回路１３により実現する
ので、中速、低速の制動を他の制動手段を設けることな
く達成できる。According to the above embodiment, when the three-phase induction motor 22 decelerates, regenerative braking due to the power generation action of the motor ceases to act, and the rotor enters a free running state, DC braking is applied to the existing chopper circuit 12 and inverter circuit 13. Therefore, braking at medium and low speeds can be achieved without providing any other braking means.
第３図は本発明に係るＰＷＭ方式を用いた三相誘導電動
機駆動用電源装置の構成を示す図である。同図において
、第１図と同一符号を付した部分は同−又は相当部分を
示す。２３はパルス幅変調／位相発生器である。FIG. 3 is a diagram showing the configuration of a power supply device for driving a three-phase induction motor using the PWM method according to the present invention. In the same figure, parts given the same reference numerals as those in FIG. 1 indicate the same or equivalent parts. 23 is a pulse width modulation/phase generator.
上記構成の三相誘導電動機駆動用電源装置において、三
相誘導電動機２２の回転数を制御するためにインバータ
回路１３の出力周波数と出力電圧を変化させて昇速運転
や減速運転を行なう。そして減速運転時において、電源
装置の出力周波数を下げると三相誘導電動機２２の発電
作用により、端子ｃ −ｅ及びダイオードＤ Ｉ” Ｄ
ｓを経てコンデンサＣ２に流れ込み、端子ａ−ｂ間の
電圧が上昇するため電圧監視回路１５がこれを検出し回
生電力放電回路１６とスイッチング素子Ｑ、を動作させ
抵抗器Ｒにより消費許せ、三相誘導電動機２２に回生制
動をかける点は上記第１図の電源装置と同じである。In the power supply device for driving a three-phase induction motor having the above configuration, in order to control the rotational speed of the three-phase induction motor 22, the output frequency and output voltage of the inverter circuit 13 are changed to perform speed-up operation or deceleration operation. During deceleration operation, when the output frequency of the power supply device is lowered, the power generation action of the three-phase induction motor 22 causes the terminal c-e and diode D
s flows into the capacitor C2, and the voltage between terminals a and b rises, so the voltage monitoring circuit 15 detects this and operates the regenerative power discharge circuit 16 and the switching element Q, allowing consumption by the resistor R, and the three-phase The point that regenerative braking is applied to the induction motor 22 is the same as the power supply device shown in FIG. 1 above.
ロータに制動力が働き減速し、ロータが低速、中速回転
になると発ｗ、を力が低下し、ロータ制動力も低下する
ので特にすべりが大きい場合は先にインバータの出力が
零になり、フリーランとなってしまう。そこでインバー
タ制御・警報回路２０は、直流切替回路２１に直流切り
替え指令を出力し、直流切替回路２１はパルス幅変調／
位相発生器を介してスイッチング素子Ｑ、−Ｑ、の内い
ずれか、例えばＱ、、Ｑ、のみを所定の出力電圧が出力
するよう同時にＯＮ−ＯＦＦさせ、三相誘導電動機２２
のＵ、Ｖ間に直流電流を流し、そのコイル部を電磁制動
部として作動させる。また、この時三相誘導電動機２２
に過大電流が流れ込むのを防止するため、パルス幅変調
／位相発生器２３によりスイッチング素子の導通時間を
パルス幅で制御し、三相誘導電動機２２に供給する直流
電流が過大を流とならないように抑制する。Braking force is applied to the rotor and it decelerates, and when the rotor rotates at low or medium speeds, the output force decreases and the rotor braking force also decreases, so especially if the slip is large, the inverter output will first drop to zero. It becomes a free run. Therefore, the inverter control/alarm circuit 20 outputs a DC switching command to the DC switching circuit 21, and the DC switching circuit 21 outputs a pulse width modulation/
Through a phase generator, one of the switching elements Q, -Q, for example, only Q, , Q, is simultaneously turned on and off so that a predetermined output voltage is output, and the three-phase induction motor 22
A direct current is passed between U and V of the coil to operate the coil as an electromagnetic brake. Also, at this time, the three-phase induction motor 22
In order to prevent excessive current from flowing into the three-phase induction motor 22, the pulse width modulation/phase generator 23 controls the conduction time of the switching element using the pulse width, so that the DC current supplied to the three-phase induction motor 22 does not flow excessively. suppress.
なお、第１図及び第３図の例では、ＡＣ４ＡＣ変換用電
源装置を例に説明したが、こ′れに限定されるものでは
なく、第４図及び第５図に示すようにＤＣ４ＡＣ変換用
電源装置としてもよいことは当然である。In addition, in the example of FIG. 1 and FIG. 3, explanation was given using an AC4AC conversion power supply device as an example, but the explanation is not limited to this, and as shown in FIGS. 4 and 5, a DC4AC conversion power supply device is used. Of course, it can also be used as a power supply device.
以上、説明したように本発明によれば、従来−般的な三
相誘導電動機駆動用電源装置では他の機械的制動装置や
電磁制動装置を用いないとロータをフリーラン状態から
短時間で完全停止させることが不可能であったものを、
これらの機械的制動装置、電磁制動装置及び直流電磁制
動用電源を用いることなく、三相誘導電動機駆動用電源
装置のみで実現きせることができる等優れた効果が得ら
れる。As explained above, according to the present invention, in the conventional three-phase induction motor drive power supply device, the rotor can be completely moved from a free running state in a short time without using other mechanical braking devices or electromagnetic braking devices. something that was impossible to stop,
Excellent effects can be obtained, such as being able to be achieved only with a three-phase induction motor drive power supply device, without using these mechanical braking devices, electromagnetic braking devices, and DC electromagnetic braking power supplies.
また、本発明は三相誘導電動機のロータ部分の質量が大
きい、例えばはずみ車等が連結されている場合やロータ
軸の摩擦が非常に小さい場合に利用すると極めて効果的
となるという優れた効果もある。Additionally, the present invention has the excellent effect of being extremely effective when used in cases where the rotor portion of a three-phase induction motor has a large mass, such as when a flywheel is connected, or when the friction of the rotor shaft is very small. .
第１図は本発明に係るＰＡＭ方式を用いた三相誘導電動
機駆動用電源装置の構成を示す図、第２図は上記構成の
三相誘導電動機駆動用電源装置の減速動作を説明するタ
イミングチャート、第３図は本発明に係るＰＷＭ方式を
用いた三相誘導電動機駆動用電源装置の構成を示す図、
第４図及び第５図はそれぞれ本発明に係る他の三相誘導
電動機駆動用電源装置の構成を示す図、第６図は従来の
ＰＡＭ方式を用いた三相誘導電動機駆動用電源装置の構
成を示す図、第７図は従来のＰＷＭ方式を用いた三相誘
導電動機駆動用電源装置の構成を示す図、第８図は、従
来の三相誘導電動機駆動用Ｔ源装置の減速動作を説明す
るタイミングチャートである。
図中、１１・・・・整流回路、１２・・・・チョッパ回
路、１３・・・・インバータ回路、１４・・・・チョッ
パ駆動回路、１５・・・・電圧監視回路、１６・・・・
回生電力放電回路、１７・・・・位相発生器、１８・・
・・電圧切替回路、１９・・・・発振器、２０・・・・
インバータ制御・警報回路、２１・・・・直流切替回路
、２２・・・・三相誘導電動機、２３・・・・パルス幅
変調／位相発生器。FIG. 1 is a diagram showing the configuration of a power supply device for driving a three-phase induction motor using the PAM method according to the present invention, and FIG. 2 is a timing chart illustrating the deceleration operation of the power supply device for driving a three-phase induction motor having the above configuration. , FIG. 3 is a diagram showing the configuration of a power supply device for driving a three-phase induction motor using a PWM method according to the present invention,
4 and 5 are diagrams showing the configuration of other three-phase induction motor drive power supply devices according to the present invention, respectively, and FIG. 6 is the configuration of a three-phase induction motor drive power supply device using the conventional PAM system. 7 is a diagram showing the configuration of a power supply device for driving a three-phase induction motor using a conventional PWM method. FIG. 8 is a diagram illustrating the deceleration operation of a conventional T-source device for driving a three-phase induction motor. This is a timing chart. In the figure, 11... rectifier circuit, 12... chopper circuit, 13... inverter circuit, 14... chopper drive circuit, 15... voltage monitoring circuit, 16...
Regenerative power discharge circuit, 17...phase generator, 18...
... Voltage switching circuit, 19... Oscillator, 20...
Inverter control/alarm circuit, 21... DC switching circuit, 22... Three-phase induction motor, 23... Pulse width modulation/phase generator.
Claims (3)
ンバータ回路からの三相交流を三相誘導電動機に供給す
る三相誘導電動機駆動用電源装置において、前記インバ
ータ回路に前記三相誘導電動機を停止する際前記回生制
動回路により制動をかけ該回生制動回路の制動作用が停
止或いは小さくなった後フリーラン状態から完全停止ま
で直流制動をかける直流切り替え回路を設けると共に、
該直流制動時に過大電流が流れることを防止する電流制
限回路を設けたことを特徴とする三相誘導電動機駆動用
電源装置。(1) In a three-phase induction motor drive power supply device that includes an inverter circuit and a regenerative braking circuit and supplies three-phase AC from the inverter circuit to a three-phase induction motor, the three-phase induction motor is stopped by the inverter circuit. At the same time, a DC switching circuit is provided which applies braking by the regenerative braking circuit and applies DC braking from a coasting state to a complete stop after the braking action of the regenerative braking circuit has stopped or decreased;
A power supply device for driving a three-phase induction motor, characterized in that a current limiting circuit is provided to prevent excessive current from flowing during the DC braking.
成すると共に、前記三相誘導電動機への交流の供給と直
流の供給の切り替えを前記インバータを構成するスイッ
チング素子のＯＮ・ＯＦＦにより行なうことを特徴とす
る請求項（１）記載の三相誘導電動機駆動用電源装置。(2) The DC power supply for the DC braking is configured by a chopper circuit, and switching between supplying AC and DC to the three-phase induction motor is performed by turning ON/OFF a switching element constituting the inverter. A power supply device for driving a three-phase induction motor according to claim (1).
パルス幅変調回路とにより構成すると共に、前記三相誘
導電動機への交流の供給と直流の供給の切り替えを前記
インバータを構成するスイッチング素子のＯＮ・ＯＦＦ
により行なうことを特徴とする請求項（１）記載の三相
誘導電動機駆動用電源装置。(3) The DC power supply for the DC braking is configured by the inverter circuit and the pulse width modulation circuit, and switching between supplying AC and DC to the three-phase induction motor is performed by turning on a switching element constituting the inverter.・OFF
A power supply device for driving a three-phase induction motor according to claim 1, characterized in that the power supply device is operated by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4218589A JPH02223396A (en) | 1989-02-21 | 1989-02-21 | Power device for driving three-phase induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4218589A JPH02223396A (en) | 1989-02-21 | 1989-02-21 | Power device for driving three-phase induction motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02223396A true JPH02223396A (en) | 1990-09-05 |
Family
ID=12628947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4218589A Pending JPH02223396A (en) | 1989-02-21 | 1989-02-21 | Power device for driving three-phase induction motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02223396A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016098563A1 (en) * | 2014-12-18 | 2016-06-23 | 日立工機株式会社 | Electric power tool |
| JP2018014802A (en) * | 2016-07-19 | 2018-01-25 | ミネベアミツミ株式会社 | Motor control circuit, motor drive controller and control method of motor drive controller |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58179188A (en) * | 1982-04-13 | 1983-10-20 | Shinko Electric Co Ltd | Braking method for induction motor |
-
1989
- 1989-02-21 JP JP4218589A patent/JPH02223396A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58179188A (en) * | 1982-04-13 | 1983-10-20 | Shinko Electric Co Ltd | Braking method for induction motor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016098563A1 (en) * | 2014-12-18 | 2016-06-23 | 日立工機株式会社 | Electric power tool |
| JPWO2016098563A1 (en) * | 2014-12-18 | 2017-09-28 | 日立工機株式会社 | Electric tool |
| US10525579B2 (en) | 2014-12-18 | 2020-01-07 | Koki Holdings Co., Ltd. | Electric tool |
| JP2018014802A (en) * | 2016-07-19 | 2018-01-25 | ミネベアミツミ株式会社 | Motor control circuit, motor drive controller and control method of motor drive controller |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101445023B1 (en) | Power conversion device | |
| US6429612B1 (en) | Fast stopping method for induction motors operating from variable frequency drives | |
| CN109672370B (en) | Motor drive system having electricity storage device | |
| JP5080161B2 (en) | Inverter device | |
| JPS58215976A (en) | Power transistor protecting device for inverter | |
| JPH02223396A (en) | Power device for driving three-phase induction motor | |
| JP2980469B2 (en) | Inverter device | |
| JP3567440B2 (en) | Inverter-driven AC motor braking method | |
| JPH02215996A (en) | Turbo-molecular pump driving power unit | |
| JPH02114829A (en) | Control circuit for flywheel power storage unit | |
| JPS61203893A (en) | Modulating method for pwm inverter | |
| JPH01318568A (en) | Generator driver | |
| US5566219A (en) | X-ray apparatus comprising of a circuit arrangement for accelerating and decelerating the rotary anobe of a rotary-anode x-ray tube | |
| JP3576310B2 (en) | AC electric vehicle control device | |
| JPH08251963A (en) | Dc brake method for inverter | |
| KR100344985B1 (en) | Braking method of washing machine | |
| JPS58179188A (en) | Braking method for induction motor | |
| JPS6395891A (en) | Controlling device for inverter | |
| JPH0740795B2 (en) | Inverter device | |
| JPH03265494A (en) | Control circuit for inverter unit | |
| KR940007433B1 (en) | Arrangement for starting induction motor | |
| JPH04178195A (en) | Pwm controller for single-phase motor | |
| JP2000156991A (en) | Device for varying speed of motor | |
| Swamy et al. | A novel stopping method for induction motors operating from variable frequency drives | |
| JPH104697A (en) | Inverter converter for power supply to electric motor of hauling vehicle |