JPS6122558B2 - - Google Patents
Info
- Publication number
- JPS6122558B2 JPS6122558B2 JP54026124A JP2612479A JPS6122558B2 JP S6122558 B2 JPS6122558 B2 JP S6122558B2 JP 54026124 A JP54026124 A JP 54026124A JP 2612479 A JP2612479 A JP 2612479A JP S6122558 B2 JPS6122558 B2 JP S6122558B2
- Authority
- JP
- Japan
- Prior art keywords
- phase
- signal
- output
- circuit
- synchronous motor
- 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.)
- Expired
Links
- 230000001360 synchronised effect Effects 0.000 claims description 23
- 238000001514 detection method Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 230000001172 regenerating effect Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000010363 phase shift Effects 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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
- H02P25/02—Arrangements or methods for the control of AC motors characterised by the kind of AC motor or by structural details characterised by the kind of motor
- H02P25/022—Synchronous motors
- H02P25/024—Synchronous motors controlled by supply frequency
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
Description
【発明の詳細な説明】
本発明は転流回路を有する強制転流方式の電流
形インバータにより駆動される同期電動機の制御
方式において、転流失敗することなく安定に運転
ができる同期電動機の制御装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a control system for a synchronous motor that can operate stably without commutation failure in a control method for a synchronous motor driven by a forced commutation type current source inverter having a commutation circuit. Regarding.
第1図は従来の電流形インバータによる同期電
動機の制御装置である。図において、1は三相交
流電源、2は三相交流電源11の交流を直流に変
換する順変換器、3は順変換器2の出力電流を平
滑する直流リアクトル、4は直流リアクトル3に
より平滑された直流を交流に逆変換するインバー
タ、5はインバータ4によつて付勢される同期電
動機、7は同期電動機の電機子巻線と界磁巻線6
の相対位置を検出する位置検出器、14は順変換
器2のサイリスタのゲートパルスの位相を制御す
る位相制御回路、13は順変換器2の位相を紋る
位相紋り回路、12は同期電動機5の入力電流を
制御する電流制御回路、15は変流器8の検出電
流を直流変換する電流検出器、17は位置検出器
7からの位置検出信号によつてインバータ4の転
流タイミングを決定する論理回路、18は同期電
動機5の速度を検出する速度検出回路、11は同
期電動機5の速度を制御する速度制御回路、16
は速度制御回路11の出力信号の極性を検出して
制御進み角βの推移・位相紋り信号を出力するβ
切換回路、10は速度設定器である。 FIG. 1 shows a conventional synchronous motor control device using a current source inverter. In the figure, 1 is a three-phase AC power supply, 2 is a forward converter that converts the AC of the three-phase AC power supply 11 into DC, 3 is a DC reactor that smoothes the output current of the forward converter 2, and 4 is smoothed by the DC reactor 3. 5 is a synchronous motor energized by the inverter 4; 7 is an armature winding and a field winding 6 of the synchronous motor;
14 is a phase control circuit that controls the phase of the gate pulse of the thyristor of the forward converter 2; 13 is a phase control circuit that controls the phase of the forward converter 2; 12 is a synchronous motor 5 is a current control circuit that controls the input current; 15 is a current detector that converts the current detected by the current transformer 8 to DC; 17 is a position detection signal from the position detector 7 that determines the commutation timing of the inverter 4; 18 is a speed detection circuit that detects the speed of the synchronous motor 5; 11 is a speed control circuit that controls the speed of the synchronous motor 5; 16;
β detects the polarity of the output signal of the speed control circuit 11 and outputs the transition/phase ripple signal of the control advance angle β.
The switching circuit 10 is a speed setting device.
このような構成の電流形インバータ装置で同期
電動機5を駆動する場合は転流コンデンサにより
強制的に転流を行なうので、自然転流方式の無整
流子電動機のように所定の制御進み角βを設ける
必要がなく、力率1で運転できトルク脈動も最小
になるという特長を有しているが、次のような問
題点があつた。つまり速度設定器10の出力であ
る速度基準信号を下げて同期電動機5を減速させ
ようとすると速度検出回路18の出力の速度帰還
信号が速度基準信号より大きくなり速度制御回路
11の出力信号の極性が反転する。これをβ切換
回路16が検出して制御進み角βを一挙に90゜以
上にし回生領域にもつていくと同時に電流の突入
を抑制するために順変換器2の位相を紋つて電流
を一度零にし、その後、回生電流を流して回生運
転される。ところが、同期電動機5の負荷が軽い
場合は転流コンデンサ電圧が低く、また、速度基
準信号を下げて減速させる場合、一度、順変換器
2の位相を紋つて電流を零にするので転流コンデ
ンサ電圧はさらに減少し、この状態で位相紋りが
解除されて回生電流が流れるためインバータ4は
転流失敗し、運転が停止してしまう欠点があつ
た。 When driving the synchronous motor 5 with a current source inverter device having such a configuration, commutation is forcibly carried out using a commutation capacitor, so the predetermined control advance angle β cannot be controlled like a natural commutation type non-commutator motor. Although it has the advantage that it does not need to be installed, can operate at a power factor of 1, and has minimal torque pulsation, it has the following problems. In other words, when an attempt is made to reduce the speed reference signal that is the output of the speed setter 10 to decelerate the synchronous motor 5, the speed feedback signal that is the output of the speed detection circuit 18 becomes larger than the speed reference signal, and the polarity of the output signal of the speed control circuit 11 changes. is reversed. The β switching circuit 16 detects this and increases the control advance angle β to 90° or more at once to bring it into the regeneration region.At the same time, in order to suppress the rush of current, the phase of the forward converter 2 is controlled to make the current once zero. After that, regenerative current is applied to perform regenerative operation. However, when the load on the synchronous motor 5 is light, the commutating capacitor voltage is low, and when decelerating by lowering the speed reference signal, the phase of the forward converter 2 is first changed to make the current zero, so the commutating capacitor voltage is low. The voltage further decreases, and in this state, the phase shift is removed and a regenerative current flows, causing the inverter 4 to fail in commutation and stop operating.
本発明の目的は、強制転流方式の電流形インバ
ータ装置で同期電動機を駆動し、減速開始時に転
流失敗することなく安定に運転を続けることがで
き、前記欠点を解消した同期電動機の制御装置を
提供することにある。 An object of the present invention is to provide a control device for a synchronous motor that can drive a synchronous motor using a forced commutation type current source inverter device and continue stable operation without commutation failure at the start of deceleration, and that eliminates the above-mentioned drawbacks. Our goal is to provide the following.
以下図面を参照して本発明を説明する。 The present invention will be explained below with reference to the drawings.
本発明の一実施例を第1図に対応させて第2図
に示し、これを参照して説明する。同一符号のも
のは同一の機能を有する。第2図において20は
速度制御回路11の出力信号の極性が正負いずれ
であつても負極性の電流基準信号を出力する絶対
値変換回路、21はβ切換回路のステツプ状に変
化する出力信号を所定の時定数をもたせて変化さ
せるようにする一次遅れ回路9は同期電動機5の
速度検出用パルスジエネレータ、23は同期電動
機5の端子電圧と速度検出回路18の出力信号よ
りインバータ4の出力周波数と同一周波数で波高
値一定の三相交流電圧を合成する三相交流合成回
路、24は三相交流合成回路23の出力である三
相交流信号と一次遅れ回路の出力であるβ位相制
御信号よりインバータ4の位相を制御するβ位相
制御回路、25はβ位相制御回路の出力よりイン
バータ4のサイリスタの転流タイミングを決定す
るβ論理回路である。 An embodiment of the present invention is shown in FIG. 2 corresponding to FIG. 1, and will be described with reference to this. Items with the same reference numerals have the same functions. In FIG. 2, 20 is an absolute value conversion circuit that outputs a current reference signal of negative polarity regardless of whether the polarity of the output signal of the speed control circuit 11 is positive or negative, and 21 is an output signal that changes in a stepwise manner from the β switching circuit. The first-order delay circuit 9, which changes the speed with a predetermined time constant, is a pulse generator for detecting the speed of the synchronous motor 5. The output frequency of the inverter 4 is determined by the terminal voltage of the synchronous motor 5 and the output signal of the speed detection circuit 18. 24 is a three-phase AC signal that is the output of the three-phase AC synthesizer circuit 23 and a β phase control signal that is the output of the first-order lag circuit. A β phase control circuit 25 controls the phase of the inverter 4, and a β logic circuit 25 determines the commutation timing of the thyristor of the inverter 4 based on the output of the β phase control circuit.
このような構成の電流形インバータによる同期
電動機の制御装置において、速度基準回路10の
出力である速度基準信号を下げて同期電動機5を
減速させた場合、速度検出回路18の出力の速度
帰還信号が速度基準信号より大きくなり速度制御
回路11の出力信号の極性がかわる。β切換回路
16は速度制御回路11の出力信号の極性の変化
を検出して出力にステツプ状に変化する信号を出
力するが、一次遅れ回路21により所定の時間を
かけて変化する信号に変換される。この一次遅れ
回路21の出力信号はβ位相制御信号であるから
β位相制御信号が時間をかけて変化すればβ位相
制御回路24によりインバータ4の出力電流の位
相は例えばβ=0゜からβ=150゜まで前記所定
の時間をかけて推移する。つまり所定の時間をか
けて力行状態から回生状態に変化していき、順変
換器2の位相すなわち順変換器2の出力直流電圧
の極性もインバータに追従して変化し、電流は零
になることなく連続して流れる。したがつて、イ
ンバータ4の転流コンデンサ電圧が減少すること
はなく転流失敗することなく安定に減速していく
ことができる。 In a synchronous motor control device using a current source inverter having such a configuration, when the synchronous motor 5 is decelerated by lowering the speed reference signal that is the output of the speed reference circuit 10, the speed feedback signal of the output of the speed detection circuit 18 is It becomes larger than the speed reference signal, and the polarity of the output signal of the speed control circuit 11 changes. The β switching circuit 16 detects a change in the polarity of the output signal of the speed control circuit 11 and outputs a signal that changes in a stepwise manner. However, the first-order delay circuit 21 converts the signal into a signal that changes over a predetermined time. Ru. Since the output signal of this first-order lag circuit 21 is a β phase control signal, if the β phase control signal changes over time, the phase of the output current of the inverter 4 is changed by the β phase control circuit 24 from β=0° to β= The angle changes over the predetermined time up to 150°. In other words, the power running state changes to the regenerative state over a predetermined period of time, and the phase of the forward converter 2, that is, the polarity of the output DC voltage of the forward converter 2, changes to follow the inverter, and the current becomes zero. It flows continuously. Therefore, the commutation capacitor voltage of the inverter 4 does not decrease, and the deceleration can be stably performed without commutation failure.
以上説明したように本発明によれば、強制転流
方式の電流形インバータを用いて同期電動機を駆
動しているので、自然転流方式のように制御進み
角βを設ける必要がなく力率1で運転ができて、
トルク脈動も最小になりさらに減速を行なう場
合、減速開始時に転流失敗することなく安定に運
転を続けることができる。 As explained above, according to the present invention, the synchronous motor is driven using a forced commutation type current source inverter, so unlike the natural commutation type, there is no need to provide a control lead angle β, and the power factor is 1. I can drive with
Torque pulsation is also minimized, and when further deceleration is performed, stable operation can be continued without commutation failure at the start of deceleration.
第1図は従来の同期電動機の制御装置の構成
図、第2図は本発明による同期電動機の制御装置
の一実施例の構成図である。
1……三相交流電源、2……順変換器、3……
直流リアクトル、4……インバータ、5……同期
電動機、11……速度制御回路、12……電流制
御回路、14……位相制御回路、17……位置検
出器、16……β切換回路、21……一次遅れ回
路、24……β位相制御回路、25……β論理回
路、23……三相交流合成回路。
FIG. 1 is a block diagram of a conventional synchronous motor control device, and FIG. 2 is a block diagram of an embodiment of a synchronous motor control device according to the present invention. 1...Three-phase AC power supply, 2...Forward converter, 3...
DC reactor, 4... Inverter, 5... Synchronous motor, 11... Speed control circuit, 12... Current control circuit, 14... Phase control circuit, 17... Position detector, 16... β switching circuit, 21 ...first-order delay circuit, 24 ....beta. phase control circuit, 25 ....beta. logic circuit, 23 .... three-phase AC synthesis circuit.
Claims (1)
換器の直流出力を平滑する直流リアクトルと、前
記平滑された直流を所定の周波数の交流に逆変換
する自励インバータと、前記自励インバータの交
流出力が印加される同期電動機から成る制御装置
において、前記同期電動機の端子電圧と速度帰還
信号より三相交流信号を合成する三相交流合成回
路と、前記三相交流合成回路の出力の三相交流信
号と速度制御回路の出力信号の極性を検出するβ
切換回路の出力のステツプ信号を所定の時間か
け、変化させて出力する一次遅れ回路の出力信号
とで前記自励インバータの位相を制御するβ位相
制御回路をそなえ、前記自励インバータの位相を
前記所定の時間をかけて推移させるようにした同
期電動機の制御装置。1. A forward converter that converts alternating current into direct current, a direct current reactor that smoothes the direct current output of the forward converter, a self-excited inverter that converts the smoothed direct current back into alternating current of a predetermined frequency, and the self-excited inverter. A control device comprising a synchronous motor to which an AC output of β to detect the polarity of the phase AC signal and the output signal of the speed control circuit
A β phase control circuit is provided to control the phase of the self-excited inverter using the output signal of the first-order lag circuit which changes the step signal of the output of the switching circuit over a predetermined period of time and outputs the resultant signal. A control device for a synchronous motor that changes over a predetermined period of time.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2612479A JPS55120396A (en) | 1979-03-08 | 1979-03-08 | Control device for synchronous motor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2612479A JPS55120396A (en) | 1979-03-08 | 1979-03-08 | Control device for synchronous motor |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55120396A JPS55120396A (en) | 1980-09-16 |
JPS6122558B2 true JPS6122558B2 (en) | 1986-06-02 |
Family
ID=12184808
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2612479A Granted JPS55120396A (en) | 1979-03-08 | 1979-03-08 | Control device for synchronous motor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55120396A (en) |
-
1979
- 1979-03-08 JP JP2612479A patent/JPS55120396A/en active Granted
Also Published As
Publication number | Publication date |
---|---|
JPS55120396A (en) | 1980-09-16 |
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