JPS60152282A - Secondary resistance controller of wound-rotor type induction motor - Google Patents
Secondary resistance controller of wound-rotor type induction motorInfo
- Publication number
- JPS60152282A JPS60152282A JP59008851A JP885184A JPS60152282A JP S60152282 A JPS60152282 A JP S60152282A JP 59008851 A JP59008851 A JP 59008851A JP 885184 A JP885184 A JP 885184A JP S60152282 A JPS60152282 A JP S60152282A
- Authority
- JP
- Japan
- Prior art keywords
- resistor
- motor
- resistance
- switch
- short
- 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.)
- Granted
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
- H02P25/00—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details
- H02P25/16—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the circuit arrangement or by the kind of wiring
- H02P25/24—Variable impedance in stator or rotor circuit
- H02P25/26—Variable impedance in stator or rotor circuit with arrangements for controlling secondary impedance
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
この発明は、運転モードが切換わるときの巻線形誘導電
動機の２次抵抗制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a secondary resistance control device for a wound induction motor when operating modes are switched.
第１図は巻線形誘導電動機の制御の従来例を示す制御回
路図である。この第１図において、３相交流電源（Ｒ，
Ｓ、Ｔ相）からの交流電力は遮断器１と変流器２を経て
逆並列接続されている５組のスイッチング手段としての
サイリスタ３に与えられるのであるが、この５組のサイ
リスタ３のうちの３組を動作させて巻線形誘導電動機４
の１次巻線に交流電圧を印加する。すなわち電源のＲ＠
電電圧この電動機４の端子Ｕに印加され、Ｓ相−圧が端
子Ｖに、Ｔ相電圧が端子Ｗに印カ目されるように３組の
サイリスタ３を導通させれは、当該電動機４は一定方向
（以下ではこれを止転と称する）に回転する。また電源
のＲ相電圧が端子Ｗに、Ｓ相電圧は前と同じく端子■に
、Ｔ相電圧は端子Ｕｉこ印加されるように３組のサイリ
スタ３を導通させると、この電動機４に印加される交流
電圧の相回転方向が逆転するので、この電動機４を上述
とは逆の方向に回転させることができる。FIG. 1 is a control circuit diagram showing a conventional example of controlling a wound induction motor. In this Figure 1, three-phase AC power supply (R,
The AC power from the S and T phases is given to five sets of thyristors 3 as switching means, which are connected in antiparallel through a circuit breaker 1 and a current transformer 2. Among these five sets of thyristors 3, By operating three sets of the wound induction motor 4
An alternating current voltage is applied to the primary winding of the In other words, R@ of the power supply
If an electric voltage is applied to the terminal U of the motor 4 and the three sets of thyristors 3 are made conductive so that the S-phase voltage is applied to the terminal V and the T-phase voltage is applied to the terminal W, the motor 4 becomes Rotates in a fixed direction (hereinafter referred to as static rotation). In addition, when three sets of thyristors 3 are made conductive so that the R-phase voltage of the power supply is applied to the terminal W, the S-phase voltage is applied to the terminal ■ as before, and the T-phase voltage is applied to the terminal Ui, the voltage is applied to the motor 4. Since the direction of phase rotation of the AC voltage is reversed, the electric motor 4 can be rotated in the opposite direction to that described above.
巻線形誘導電動機の２次巻線には２次抵抗器が接続され
ているが、この第１図に示す従来例ではこの２次抵抗器
は抵抗６と７と８との３つの部分に区分されておシ、そ
れぞれの区分を短絡するための抵抗短絡スイッチが設け
られている。すなわち抵抗短絡スイッチ２３が動作すれ
ば抵抗６が短絡されるので、電動機４の２次巻線に接続
されるのは７と８なる抵抗だけとなる。同様に抵抗短絡
スイッチ２６が動作すれば６と７なる抵抗が短絡される
ことになり、さらに抵抗短絡スイッチ２９が動作すれば
全２次抵抗が短絡されることになる。A secondary resistor is connected to the secondary winding of a wound induction motor, but in the conventional example shown in FIG. 1, this secondary resistor is divided into three parts, resistors 6, 7, and 8. A resistive shorting switch is provided for shorting each section. That is, when the resistor shorting switch 23 operates, the resistor 6 is short-circuited, so that only resistors 7 and 8 are connected to the secondary winding of the motor 4. Similarly, if the resistance shorting switch 26 operates, the resistors 6 and 7 will be shorted, and if the resistance shorting switch 29 operates, all the secondary resistances will be shorted.
このように当該巻線形部導電動機４の２次巻線に接続さ
れている抵抗６，７．８を段階的に短絡すると、この電
動機４の速度を段階的に変化させることができる。By short-circuiting the resistors 6, 7.8 connected to the secondary winding of the winding conductive motor 4 in stages in this manner, the speed of the motor 4 can be changed in stages.
巻線形誘導電動機４の回転子には速度発信機５が結合さ
れていて、この速度発信機５からは当該電動機４の速度
実際値信号が得られる。一方速度設定器１１からは１２
なる加減速調節器を経て速度目標値信号が得られるので
、この速度目標値信号と前述の速度実際値信号とをＰＩ
調１！Ｉ′ｌ器でなる速度調節器１３に入力させ、この
速度１節器１３から内入力信号の偏差を零にする電流目
標値信号をとり出す。変流器２から出力され、整流器１
４を介して得られる電流実際値信号と、前述の電流目標
値（ｉｎ号とを同じ＜ＰＩ調節器でなる電流ル９節器１
５に入力させ、この内入力信号の偏差を零にする制御信
号が点弧角調整器１６と１７とに発せられるのであるが
、この両点弧角調整器１６と１７はそのどちらか一方の
みが動作するようになっている。A speed transmitter 5 is connected to the rotor of the wound induction motor 4, from which the actual speed signal of the motor 4 is obtained. On the other hand, from the speed setting device 11, 12
Since the speed target value signal is obtained through the acceleration/deceleration regulator, this speed target value signal and the aforementioned speed actual value signal are
Key 1! A current target value signal is inputted to a speed regulator 13 consisting of an I'l regulator, and a current target value signal that makes the deviation of the internal input signal zero is taken out from this speed regulator 13. Output from current transformer 2, rectifier 1
The current actual value signal obtained through 4 and the aforementioned current target value (in) are set to
5, and a control signal that makes the deviation of the input signal zero is sent to firing angle regulators 16 and 17, but both firing angle regulators 16 and 17 only control one of them. is now working.
すなわち点弧角調整器１６は電動機４を正転させるため
のものであって、正転用の３組のサイリスタ３を位相制
御し、点弧角調整器１７は逆転用の３組のサイリスタ３
を位相制御するので、電動機４の１次巻線端子Ｕ、Ｖ、
’Ｗに印加される電圧の大きさと相回転方向を自由に調
節することができる。That is, the firing angle adjuster 16 is used to rotate the electric motor 4 in the normal direction, and controls the phase of three sets of thyristors 3 for forward rotation, and the firing angle regulator 17 is used to control the phase of three sets of thyristors 3 for reverse rotation.
Since the phase of the motor 4 is controlled, the primary winding terminals U, V,
'The magnitude of the voltage applied to W and the direction of phase rotation can be freely adjusted.
加減速調節器］２を介して得られる速度設定器１１から
の速度目標値信号はコンパレータ２１゜２４．２７に与
えられ、との速度目標値信号がそれぞれのコンパレータ
の動作設定値に到達すると、抵抗短終阻止手段としての
短絡阻止リレー３０が励磁されていることを条件にし、
て抵抗短絡指令リレー２２，２５．２８を励磁するので
前述の抵抗短絡スイッチ２３，２６．２９が動作する。The speed target value signal from the speed setter 11 obtained via the acceleration/deceleration regulator] 2 is given to the comparator 21.24.27, and when the speed target value signal reaches the operation setting value of each comparator, Provided that the short circuit prevention relay 30 as the resistance short termination prevention means is energized,
Since the resistance shorting command relays 22, 25.28 are excited, the resistance shorting switches 23, 26.29 described above operate.
すなわちこの電動機４を始動したとき、速度゛目標値信
号は低レベルにあるのでコンパレータ２１，２４゜２７
はいずれも不動作であるため、電動機４０２次巻線には
全抵抗６，７．８が接続されることになり、大きな始動
トルクを発生して電ｉｍ４の始動と加速を容易にし７て
いるが、この電動機４の速度はこの２次抵抗器の抵抗値
と負荷トルクとで定寸る速度以上にはならない。しかし
、速度目標値信号がこの速度以上の値になると、コンパ
レータ２１が動作り、て抵抗短絡指令リレー２２が励磁
され、抵抗短絡スイッチ２３が動作すれは６が短終され
るので、電ｖｂ桜４の２次巻線に接続される抵抗の値が
減少するので、この抵抗値と負荷トルクとで定まる速度
まで電動機速度は上昇する。同様にしてコンパレータ２
４が動作すれば電動機４の２次巻線に接続されるのは抵
抗８のみとなシ、更にコンパレータ２７が動作すれは全
抵抗６，７．８が短絡されるので、この電動機４は同期
速度に近い最高速度に達する。That is, when this electric motor 4 is started, the speed/target value signal is at a low level, so the comparators 21, 24, 27
Since both are inactive, a total resistance 6,7.8 is connected to the secondary winding of the motor 40, which generates a large starting torque and facilitates the starting and acceleration of the electric motor 40. However, the speed of this motor 4 does not exceed the speed determined by the resistance value of this secondary resistor and the load torque. However, when the speed target value signal reaches a value higher than this speed, the comparator 21 is activated, the resistance shorting command relay 22 is energized, and the resistance shorting switch 23 is activated, causing 6 to be short-terminated. Since the value of the resistance connected to the secondary winding 4 decreases, the motor speed increases to a speed determined by this resistance value and the load torque. Similarly, comparator 2
4 operates, only the resistor 8 is connected to the secondary winding of the motor 4. Furthermore, when the comparator 27 operates, all resistors 6, 7.8 are short-circuited, so the motor 4 is synchronous. Reach maximum speed close to speed.
この様に２次巻線に接続されている抵抗６，７゜８を段
階的に短絡すると電動機４の速度も段階的に変化をする
が、この２次抵抗変化とＡｉ］述せるサイリスタの位相
制御とを組合わせることにより、当該電動機４の速度を
連続的に変化させることができる。In this way, if the resistors 6, 7゜8 connected to the secondary winding are short-circuited in stages, the speed of the motor 4 will also change in stages, but this secondary resistance change and the phase of the thyristor described by Ai] By combining this with control, the speed of the electric motor 4 can be changed continuously.
１８なる運転指令演算器は速度設定器１１と速度発信機
５との信号を受けて電動機４の運転・停止と回転方向を
指令する機能を有する。すなわち速度設定器１１から得
られる回転方向信号はこの運転指令演算器１８を経由し
１９なる切換指令演算器からの信号によｐ点弧角調整器
１６と１７のいずれか一方を動作させて当該電動機４を
正転あるいは逆転方向に運転させる。さらに運転開始と
同時に加減速調節器１２と速度調節器１３に動作指令を
送り、また電動１機４が完全に停止すれば同じく加減速
調節器１２と速度調節器］３をゼロホールドさせる。The operation command calculator 18 has a function of receiving signals from the speed setting device 11 and the speed transmitter 5 and instructing the motor 4 to operate/stop and the direction of rotation. In other words, the rotational direction signal obtained from the speed setting device 11 passes through the operation command calculator 18, and operates one of the P firing angle adjusters 16 and 17 according to the signal from the switching command calculator 19. The electric motor 4 is operated in the forward or reverse direction. Furthermore, an operation command is sent to the acceleration/deceleration regulator 12 and the speed regulator 13 at the same time as the start of operation, and when the electric motor 4 completely stops, the acceleration/deceleration regulator 12 and the speed regulator 3 are also held at zero.
運転中の巻線形誘導電動機４が駆動運転中であるか制御
運転中であるかは、速度調節器１３からトルク極性信号
としてとり出される。このトルク極性信号は運転モード
検出手段としての切換指令演算器１９に入力されるので
あるが、この切換指令演算器１９は前述の運転方向を指
令する機能の他にこの運転モードの切換えを指令する機
能を有する。一定周波数で運転される訪導電動機の制動
方法としては逆相制動がもつとも一般的である。Whether the wound induction motor 4 in operation is in drive operation or control operation is taken out from the speed regulator 13 as a torque polarity signal. This torque polarity signal is input to a switching command calculator 19 as a driving mode detection means, and this switching command calculator 19 not only has the function of commanding the driving direction described above, but also commands switching of this driving mode. Has a function. Reverse phase braking is a common method for braking motors operated at a constant frequency.
それ放電動機４が正転方向に駆動運転中であるとすると
点弧角調整器１６が動作中であり、点弧角Ｔｈｋ器１７
は不動作である。ここでトルク極性信号が切換わったこ
とをこの切換指令演算器１９が弁別すると、電動機４が
正転方向に運転中であっても動作中の点弧角調整器１６
を停止し、て１７を動作させることによシミ動機４は逆
相制動状態になり、急速にその速度は低下する。If the discharge motor 4 is driving in the forward rotation direction, the firing angle regulator 16 is in operation, and the firing angle Thk regulator 17 is in operation.
is inactive. When the switching command calculator 19 determines that the torque polarity signal has been switched, the firing angle regulator 16 is activated even if the electric motor 4 is running in the forward rotation direction.
By stopping the motor 17 and operating the motor 17, the stain motor 4 enters a reverse phase braking state, and its speed rapidly decreases.
上述の点弧角調整器１６．１７の動作を切換えて電動機
４に印加される電圧の相回転方向の切換えはサイリスタ
３に流れる電流が零のときに切換え々いと電源短絡にな
るのであるが、切換指令演算器１９はこの電流を制御し
監視する機能を合わせて有する。すなわちトルク極性信
号が反転して運転モード切換えの指令がこの切換指令演
算器１９に与えられると、この切換指令演算器１９から
電流調節器１５にパルスシフト指令が与えられ、このパ
ルスシフト指令により動作中の点弧角調整器１６は正転
方向に電圧を印加Ｌ７ている３組のサイリスタ３の点弧
角αをαｍａｘにシフトさせる。これによシミ動機４に
流れる一流が零になったことを検出してこの切換指令演
算器１９は点弧角調整器１７を動作させるので、この電
動機４は電源短絡を生ずることなく逆相制動運転に入る
のである。Switching the phase rotation direction of the voltage applied to the motor 4 by switching the operation of the above-mentioned firing angle regulators 16 and 17 will result in a short circuit of the power supply if the switching occurs when the current flowing through the thyristor 3 is zero. The switching command calculator 19 also has the function of controlling and monitoring this current. That is, when the torque polarity signal is reversed and a command to switch the operation mode is given to the switching command calculator 19, a pulse shift command is given from the switching command calculator 19 to the current regulator 15, and the pulse shift command causes the operation to take place. The firing angle regulator 16 inside shifts the firing angle α of the three sets of thyristors 3 to which a voltage is applied L7 in the normal rotation direction to αmax. As a result, the switching command calculator 19 detects that the current flowing to the stain motor 4 has become zero and operates the firing angle adjuster 17, so that the electric motor 4 performs reverse phase braking without causing a power short circuit. It's time to start driving.
ところでｉ；１ｉ４７Ｉ機４が逆相制動運転になるとき
に、２次巻線に接続されている抵抗６．７．８がすべて
短絡されているとこの電動機４のインピーダンスが小さ
いので非常に大きな電流がこの電動機４に流れるから、
サイリスタ３を損傷したυ、過電流リレーが動作して電
動機４の運転が中断されるなどの不都合を発生するおそ
れがある。よって逆相制動運転に入るときは電動機４の
２次巻線には抵抗６．７．８が全部接続されているよう
にする。抵抗短絡阻止手段としての短絡阻止リレー３０
がこの役割シをはたすリレーであって、電動機４が駆動
運転中であれば切換指令演算器１９からの出力によシこ
の短絡阻止リレー３０は励磁されるので抵抗短絡指令リ
レー２２，２５．２８と抵抗短絡スイッチ２３，２６．
２９はそれぞれコンパレータ２１，２４．２７からの指
令で抵抗６，７．８を適宜短絡することができる。しか
し電動機４が制動運転モードに入ると切換指令演算器１
９の指令によシこの短絡阻止リレー３０は無励磁となる
ため、コンパレータ２１，２４．２７の指令がどのよう
なものであっても抵抗短絡スイッチ２３゜２６．２９は
動作せず、よって電動機４の２次巻線には全抵抗６．７
．８が接続されることになる。By the way, i;1i47I When the machine 4 enters anti-phase braking operation, if all the resistors 6, 7, and 8 connected to the secondary winding are short-circuited, the impedance of this motor 4 is small, so a very large current will flow. flows to this electric motor 4, so
If the thyristor 3 is damaged, the overcurrent relay may operate, and the operation of the motor 4 may be interrupted. Therefore, when entering the reverse phase braking operation, the resistors 6, 7, and 8 are all connected to the secondary winding of the motor 4. Short circuit prevention relay 30 as resistance short circuit prevention means
is a relay that fulfills this role, and when the motor 4 is in driving operation, the short circuit prevention relay 30 is energized by the output from the switching command calculator 19, so that the short circuit command relay 22, 25, 28 is energized. and resistor shorting switches 23, 26.
29 can appropriately short-circuit the resistors 6 and 7.8 in response to commands from the comparators 21 and 24.27, respectively. However, when the electric motor 4 enters the braking operation mode, the switching command calculator 1
According to the command 9, this short-circuit prevention relay 30 is de-energized, so no matter what the commands of the comparators 21, 24, 27 are, the resistor short-circuit switches 23, 26, 29 do not operate, and therefore the electric motor The total resistance of the secondary winding of 4 is 6.7
．． 8 will be connected.
しかしながらこのような制御装置を有する巻線用
形部導電動機４がその週期速度に近い最高速度て運転中
に切換指令演算器］９へ運転モード切換指令が繰返して
入力される場合がある。たとえば天井クレーンが荷物を
吊って抵抗６．７．８が短絡された状態すなわち全速で
走行中あるいは横行中に急激に停止させようとする場合
、運転モードは当然駆動運転から制動退転に切換わるの
で、短絡阻止リレー３０は無励磁となって当該電動様４
の２次巻線には全抵抗６．７．８が挿入され、１次巻線
には相回転が逆方向の電圧が印加されて逆相制動運転に
入シ、その速度を急激に減少させようとするのであるが
、そのとき吊荷が振動するととの吊荷に引張られて制動
運転中であるにも拘らず速度調節器１３からのトルク極
性信号か反転して、切換指令演算器１９は栴ひ駆動運転
を指令する信号を出力する。そのため相回転方向は再ひ
正転方向に切換わるとともに短絡阻止リレー３０も励磁
されるのであるが、そのときのｋ ｈ 機４の速度かコ
ンパレータ２７で設定している値よりも犬であると、抵
抗短絡指令リレー２８と抵抗短絡スイッチ２９が動作す
るため、２次抵抗器６．７．８は一挙に全部短絡される
ことになシ、電動機４には大きな電流が突入する。しか
し吊荷が振動して上記とは逆の方向に振れると再び制動
運転モードとなる。However, while the winding shaped part conductive motor 4 having such a control device is operating at a maximum speed close to its weekly speed, an operation mode switching command may be repeatedly input to the switching command calculator 9. For example, when an overhead crane is lifting a load and attempts to stop suddenly while the resistor 6.7.8 is short-circuited, that is, while traveling at full speed or traversing, the operation mode will naturally switch from driving operation to braking retraction. , the short-circuit prevention relay 30 is de-energized and the electric motor 4
A total resistance 6.7.8 is inserted into the secondary winding of the motor, and a voltage whose phase rotation is in the opposite direction is applied to the primary winding to enter reverse phase braking operation and rapidly reduce the speed. However, when the suspended load vibrates, the torque polarity signal from the speed regulator 13 is reversed and the switching command calculator 19 outputs a signal instructing the sluice drive operation. Therefore, the phase rotation direction is switched again to the forward rotation direction and the short-circuit prevention relay 30 is also energized. Since the resistor shorting command relay 28 and the resistor shorting switch 29 operate, the secondary resistors 6.7.8 are not all shorted at once, and a large current rushes into the motor 4. However, if the suspended load vibrates and swings in the opposite direction to the above, the braking operation mode returns.
このように駆動運転と制動運転とが交互に指令されると
、その都度抵抗６．７．８は一挙に短絡と開放とを繰返
すので電動機４に流れる電流が大幅に駆動し、過電流な
ど種柚の不具合を生ずる。When driving operation and braking operation are alternately commanded in this way, the resistor 6.7.8 is repeatedly short-circuited and opened at once each time, so the current flowing to the motor 4 is significantly driven, causing various problems such as overcurrent. Causes problems with Yuzu.
この発明は高速で運転中の巻線影線与電動機が駆動運転
モードと制動運転モードヶ交互に繰返し。In this invention, the winding shadow motor which is operating at high speed alternates between driving operation mode and braking operation mode.
ても、当該電動機に流入する電流の変動を抑制できる巻
線形銹２＃、電８ｉＪＪ機の２次抵抗制御装置を提供す
ることを目的とする。It is an object of the present invention to provide a secondary resistance control device for a winding type 2#, electric 8iJJ machine, which can suppress fluctuations in the current flowing into the electric motor.
この発明は、巻勝形誘導電動機が高速で運転中に制動運
転モードから駆動運転モードに切換って２次抵抗器の短
絡を阻止する抵抗短絡阻止手段の阻止動作が解除された
ときに、２次抵抗器の抵抗値は大きな値であシ、それか
ら順次抵抗が短絡されてその抵抗値が減少して行くよう
な順序制御手段を設けることによシ、２次巻線に接続さ
れている抵抗の値が一挙に零になるのを妨けることによ
り、当該電動機に流入する電流が大幅に変動することが
ないようにしようとするものである。In this invention, when the winding type induction motor switches from the braking operation mode to the driving operation mode while operating at high speed and the blocking operation of the resistance short-circuit preventing means for preventing short-circuiting of the secondary resistor is released, the second The resistance value of the secondary resistor is a large value, and by providing a sequential control means such that the resistance value is decreased by short-circuiting the resistors one after another, the resistance value connected to the secondary winding is By preventing the value of from becoming zero all at once, it is intended to prevent the current flowing into the motor from fluctuating significantly.
第２図は本発明の実施例を示す制御回路であって、この
第２図によｐ以下に本発明の詳細な説明する。FIG. 2 shows a control circuit showing an embodiment of the present invention, and the present invention will be explained in detail below with reference to FIG.
第２図において前述の第１図に示す従来例と異なるとこ
ろは、順序制御手段としての抵抗短終スイッチ２３の補
助接点２３Ａが抵抗短絡指令リレー２５の接点に直列に
挿入され、また抵抗短絡スイッチ２６の補助接点２６Ａ
が同じく順序制御手段として抵抗短絡指令リレー２８の
接点に直列に押入されていることであって、上記以外の
ものすなわち遮断器１、変流器２、逆並列接続されてい
る５組のサイリスタ３、巻線形鰐４電動機４とこれに結
合されている速度発信機５、抵抗６と７と８とで構成さ
れている２次抵抗器、速度設定器１１、加減速調節器１
２、速度調節器１３、整流器１４、電流調節器１５、点
弧角調整器１６と１７、運転指令演算器１８、切換指令
演算器１９、コンパレータ２１と２４と２７、抵抗短絡
指令リレー２２と２５と２８、抵抗短絡スイッチ２３と
２６と２２９、短絡阻止リレー３０のそれぞれに付され
ている符号・名称・機能はすべて第１図に示すものと同
じであるから、その説明は省略する。The difference in FIG. 2 from the conventional example shown in FIG. 26 auxiliary contacts 26A
are also inserted in series to the contacts of the resistance short circuit command relay 28 as sequence control means, and other components other than the above, namely, the circuit breaker 1, the current transformer 2, and the five sets of thyristors 3 connected in antiparallel are connected in series. , a wound wire crocodile 4 electric motor 4, a speed transmitter 5 coupled thereto, a secondary resistor composed of resistors 6, 7, and 8, a speed setting device 11, and an acceleration/deceleration regulator 1.
2. Speed regulator 13, rectifier 14, current regulator 15, firing angle regulators 16 and 17, operation command calculator 18, switching command calculator 19, comparators 21, 24 and 27, resistance short circuit command relays 22 and 25 and 28, resistor short circuit switches 23, 26, and 229, and short circuit prevention relay 30, the symbols, names, and functions given to them are all the same as those shown in FIG. 1, so their explanations will be omitted.
順序制御手段として抵抗短絡スイッチ２３と２６の補助
接点２３Ａと２６Ａが第２図に示すように抵抗短絡指令
リレー２５と２８の接点に直列に接続されていると、尚
該電動機４の運転モ・−ドが制動運転から駆動運転に切
換って短絡阻止リレー３０が励磁されても、２次巻線に
接続されている抵抗６゜７．８が一挙に短終されること
はない０すなわち全抵抗６．７．８を短終する抵抗短絡
スイッチ２９を励磁する回路には常時開なる補助接点２
６Ａが挿入されていて、抵抗短絡スイッチ２６が励磁さ
れなければこのスイッチ２９は動作しない。しかしこの
抵抗短絡スイッチ２６はまた抵抗短絡スイッチ２３が動
作しなけれは励磁されないように、常時開々るスイッチ
２３の補助接点２３Ａか抵抗短絡スイッチ２６の励磁回
路に挿入されている。If the auxiliary contacts 23A and 26A of the resistance shorting switches 23 and 26 are connected in series to the contacts of the resistance shorting command relays 25 and 28 as shown in FIG. - Even if the short-circuit prevention relay 30 is energized when the motor is switched from braking operation to driving operation, the resistance 6°7.8 connected to the secondary winding is not short-circuited at once. A normally open auxiliary contact 2 is provided in the circuit that excites the resistor shorting switch 29 that short-terminates the resistor 6.7.8.
6A is inserted, and unless the resistance shorting switch 26 is energized, this switch 29 will not operate. However, this resistance shorting switch 26 is also inserted into the normally open auxiliary contact 23A of the switch 23 or the excitation circuit of the resistance shorting switch 26 so that it is not energized unless the resistance shorting switch 23 is operated.
結局この電動機４が駆動運転モードに切換ると、そのと
きの電動機４の速度には無関係に大きな抵抗値の２次抵
抗が２次巻線に接続され、まず抵抗短絡スイッチ２３が
動作して抵抗６を短絡する。Eventually, when this electric motor 4 switches to the driving operation mode, a secondary resistor with a large resistance value is connected to the secondary winding regardless of the speed of the electric motor 4 at that time, and the resistor shorting switch 23 is activated to resist the resistance. 6 is shorted.
このとき補助接点２３Ａが閉となるので抵抗短終スイッ
チ２６は動作可能な状態となり、抵抗短終指令リレー２
５が動作すると抵抗７を短終して、電動機４の２次巻線
には抵抗８のみが接続されることになる。ひきつづき補
助接点２６Ａが閉状態となって抵抗短終スイッチ２９が
動作し、２次抵抗器は全部短絡される。抵抗短絡スイッ
チ２３，２６゜２９は一般に動作指令が入力されてから
その接点が閉になるまでに約２０ミリ秒の時間を必要と
するので、当該電動機４の運転モードが制動運転で・ら
駆動運転に切換った瞬間から、２次抵抗器″Ｓ；芒絡さ
れるまでにはこの２０ミリ秒に抵抗短絡スイッチの数を
乗じた時間が経過することになるので、この間にサイリ
スタ３を位相制御して過電流になるのを防ぐことができ
る。At this time, the auxiliary contact 23A is closed, so the resistance short termination switch 26 becomes operable, and the resistance short termination command relay 2
5 operates, the resistor 7 is short-circuited, and only the resistor 8 is connected to the secondary winding of the motor 4. Subsequently, the auxiliary contact 26A is closed, the resistance short termination switch 29 is operated, and all the secondary resistors are short-circuited. Since the resistance shorting switches 23, 26 and 29 generally require about 20 milliseconds from when an operation command is input until their contacts close, it is important to note that the operating mode of the motor 4 is braking or driving. From the moment the operation is switched on until the secondary resistor "S" is connected, a time equal to 20 milliseconds multiplied by the number of resistor shorting switches will elapse, so during this time the thyristor 3 should be phased out. It can be controlled to prevent overcurrent.
制動運転から駆動運転に切換わるときに、全抵抗短絡ま
での時間遅れは上述した程度の時間があれば十分である
が、さらに大きな時間遅れを８做とするときは、順序制
御回路にリレーを挿入してこのリレーの動作時間遅れを
加算させる方法や、限時リレーを使用し、て大幅に遅れ
時間を増大させることもできる。When switching from braking operation to driving operation, the above-mentioned time delay until all resistances are shorted is sufficient, but if you want an even larger time delay of 8 degrees, it is necessary to add a relay to the sequential control circuit. It is also possible to significantly increase the delay time by inserting a relay and adding the operation time delay of this relay, or by using a time-limited relay.
この発明によれば、巻線形部導電ｌＩＩ機が高速運転中
にその運転モードが制動運転から駆動運転に切換わって
、２次抵抗器の短絡を阻止する抵抗短絡阻止手段の阻止
動作が解除されても、２次抵抗ムは大きな抵抗値から順
次帰結されてその抵抗値が減少するように回路を構成し
２ているので、２次抵抗器が一挙に短絡されることによ
る大きな電流変動を効果的に抑制することができるし、
このような効果を発揮させるために遺訓する部品は零で
あるから、コスト上昇もプつたく無い。According to this invention, the operation mode of the winding portion conductive III machine is switched from braking operation to driving operation during high-speed operation, and the blocking operation of the resistance short-circuit preventing means for preventing short-circuiting of the secondary resistor is released. However, since the circuit is configured so that the secondary resistors are successively reduced in resistance value starting with the largest resistance value, large current fluctuations caused by short-circuiting of the secondary resistors at once can be effectively suppressed. can be suppressed,
There are zero parts required to achieve this effect, so the cost increase is not too bad.
第１図は巻線影線導篭動後の制御の従来例を示す制御回
路図であシ、第２図は本発明の実施例を示す制御回路図
である。
１・・・・・・遮断器、２・・・・・・変流器、３・・
・・・・スイッチング手段としてのサイリスタ、４・・
・・・・巻線形誘導電動機、５・・・・・・速度発信機
、６，７．８・・・・・・抵抗、１１・・・・・・速度
設定器、１２・・・・・・加減速調節器、１３・・・・
・・速度調節器、１４・・・・・・整流器、１５・・・
・・・電流調節器、１６．１７・・・・・・点弧角調整
器、１８・・・・・・運転指令演算器、１９・・・・・
・運転モード検出手段としての切換指令波ａ−器、２１
．２４．２７・・・・・・コンパレータ、２２゜２５．
２８・・・・・抵抗短絡指令リレー、２３ 、２６ 、
２９・・・・・抵抗短絡スイッチ、２３Ａ、２６Ａ・・
・・・・順序制御手段としての抵抗短終スイッチの補助
接点、３０・・・・・・抵抗短絡阻止手段としての短絡
阻止リレー。
第１図
第２図FIG. 1 is a control circuit diagram showing a conventional example of control after winding shadow guide movement, and FIG. 2 is a control circuit diagram showing an embodiment of the present invention. 1... Breaker, 2... Current transformer, 3...
...Thyristor as a switching means, 4...
...Wound induction motor, 5...Speed transmitter, 6, 7.8...Resistor, 11...Speed setter, 12...・Acceleration/deceleration regulator, 13...
...Speed regulator, 14... Rectifier, 15...
...Current regulator, 16.17... Firing angle regulator, 18... Operation command calculator, 19...
・Switching command wave a-device as operation mode detection means, 21
．． 24.27...Comparator, 22°25.
28...Resistance short circuit command relay, 23, 26,
29...Resistance shorting switch, 23A, 26A...
. . . Auxiliary contact of the resistance short-termination switch as a sequence control means, 30 . . . A short circuit prevention relay as a resistance short circuit prevention means. Figure 1 Figure 2
Claims (1)
次巻線に接続され、２次抵抗器が２次巻線に接続され、
駆動運転か制動運転かを弁別する運転モード検出手段を
備えた巻線形誘導電動機が駆動運転中は尚該電動機の速
度信号にもとづき抵抗短絡指令手段が発する指令で動作
する抵抗短絡手段によシ前記２次抵抗器を所望の抵抗値
に設定し１、制動運転中は当該電動機１次巻線印加電圧
の相回転方向を逆転させるとともに抵抗短絡阻止手段に
よシ前記抵抗短絡手段を不動作にするようなされている
巻線形誘導電動機において、前記抵抗短絡阻止手段の動
作が解除されたとき、前記２次抵抗器の抵抗値を大きな
値から順次減少させる順序制御手段を４ｉＪ記抵抗抵抗
短絡に備えてなることを特徴とする巻線形誘導電動機の
２次抵抗制御装置０The switching means for switching the phase rotation direction of the AC voltage is 1.
the secondary winding is connected to the secondary winding; the secondary resistor is connected to the secondary winding;
When a wound wire induction motor equipped with an operation mode detecting means for discriminating between driving operation and braking operation is in driving operation, the resistance shorting means operated by the command issued by the resistance shorting command means based on the speed signal of the motor is used. The secondary resistor is set to a desired resistance value 1, and during braking operation, the phase rotation direction of the voltage applied to the primary winding of the motor is reversed, and the resistor short-circuiting means is made inoperable by the resistor short-circuit prevention means. In such a wound induction motor, when the operation of the resistor short-circuit prevention means is released, a sequence control means is provided for sequentially decreasing the resistance value of the secondary resistor from a large value in order to prevent a resistor short circuit. Secondary resistance control device 0 for a wound induction motor characterized by
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59008851A JPS60152282A (en) | 1984-01-20 | 1984-01-20 | Secondary resistance controller of wound-rotor type induction motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59008851A JPS60152282A (en) | 1984-01-20 | 1984-01-20 | Secondary resistance controller of wound-rotor type induction motor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60152282A true JPS60152282A (en) | 1985-08-10 |
| JPH0347071B2 JPH0347071B2 (en) | 1991-07-18 |
Family
ID=11704238
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59008851A Granted JPS60152282A (en) | 1984-01-20 | 1984-01-20 | Secondary resistance controller of wound-rotor type induction motor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60152282A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012161547A2 (en) * | 2011-05-26 | 2012-11-29 | 주식회사 자이벡 | Apparatus for controlling rotor current in a wound-rotor type induction motor |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4894811A (en) * | 1972-03-16 | 1973-12-06 | ||
| JPS57183096U (en) * | 1981-05-14 | 1982-11-19 |
-
1984
- 1984-01-20 JP JP59008851A patent/JPS60152282A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4894811A (en) * | 1972-03-16 | 1973-12-06 | ||
| JPS57183096U (en) * | 1981-05-14 | 1982-11-19 |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012161547A2 (en) * | 2011-05-26 | 2012-11-29 | 주식회사 자이벡 | Apparatus for controlling rotor current in a wound-rotor type induction motor |
| WO2012161547A3 (en) * | 2011-05-26 | 2013-01-17 | 주식회사 자이벡 | Apparatus for controlling rotor current in a wound-rotor type induction motor |
| CN103582999A (en) * | 2011-05-26 | 2014-02-12 | 株式会社Xyvec | Apparatus for controlling rotor current in a wound-rotor type induction motor |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0347071B2 (en) | 1991-07-18 |
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