JPS6059979A - Synchronizing signal detecting circuit - Google Patents

Synchronizing signal detecting circuit

Info

Publication number
JPS6059979A
JPS6059979A JP58168033A JP16803383A JPS6059979A JP S6059979 A JPS6059979 A JP S6059979A JP 58168033 A JP58168033 A JP 58168033A JP 16803383 A JP16803383 A JP 16803383A JP S6059979 A JPS6059979 A JP S6059979A
Authority
JP
Japan
Prior art keywords
voltage
phase
inverter
voltages
power source
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
Application number
JP58168033A
Other languages
Japanese (ja)
Other versions
JPH0410315B2 (en
Inventor
Yasuaki Yatsusu
康明 八須
Shinoo Kawabata
川畑 志農夫
Shintaro Kiyomitsu
清光 晋太郎
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fuji Electric Co Ltd
Original Assignee
Fuji Electric Co Ltd
Fuji Electric Manufacturing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fuji Electric Co Ltd, Fuji Electric Manufacturing Co Ltd filed Critical Fuji Electric Co Ltd
Priority to JP58168033A priority Critical patent/JPS6059979A/en
Publication of JPS6059979A publication Critical patent/JPS6059979A/en
Publication of JPH0410315B2 publication Critical patent/JPH0410315B2/ja
Granted legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Power Conversion In General (AREA)
  • Inverter Devices (AREA)

Abstract

PURPOSE:To detect a synchronizing signal of a switching point without influence of a turbulence by producing adjacent 2-phase voltages of an AC power source via a voltage divider to compare them in the magnitude when an induction motor driven by an inverter is regeneratively braked. CONSTITUTION:A 3-phase power source is connected to a rectifier 30 and a PWM inverter 32 to drive an induction motor 33, and electric power is returned to the power source through a transistor inverter 34 at the regenerative brake time. At this time, the phases of the power source are inputted to comparators 7-9, the voltages among the phases are divided by dividing resistors 4-6, and inputted to comparators 7-9 to detect the point of switching the magnitudes of the both voltages, thereby controlling arms of the inverter 34 through logic circuits 13, 15, and a timer 14. Accordingly, the advanced or delayed time of an electric angle determined by the voltage dividing ratio can be detected to obtain an electric angle which is not varied by a turbulence, thereby preventing the shortcircuit between the arms.

Description

【発明の詳細な説明】 〔発明の属する技術分野〕 この発明は多相交流回路における任意の瞬接する2相の
電圧の大小関係が切替わる点から一定の電気角だけ移動
した点を検出する同期信号検出回路に関する。
[Detailed description of the invention] [Technical field to which the invention pertains] This invention relates to a synchronization method that detects a point shifted by a certain electrical angle from a point where the voltage magnitude relationship of two arbitrary phases in instantaneous contact in a multiphase AC circuit changes. This invention relates to a signal detection circuit.

〔従来技術とその問題点〕[Prior art and its problems]

多相交流回路としてもつとも一般的な3相交流回路を考
えるとぎこの回路からの3相交流電力を整流器により直
流に整流したのち可変電圧可変周波数の交流電力に変換
して、誘導電動機を所望の回転速度で運転させるインバ
ータ装置が多用されている。この誘導電動機を急速に減
速あるいは停止させたいときには電気制動ンかけるが、
省エネルギーの見地から電動機が保有する運動エネルギ
ーナ電力として前記3相交流電源へ返還するいわゆる回
生制動方式が望ましい。その定めに定とえばトランジス
タなどのようなスイッチング累子でなるインバータを上
述の整流器に並列接続しておき回生制動に供される。
Considering a typical 3-phase AC circuit as a multi-phase AC circuit, the 3-phase AC power from this circuit is rectified into DC using a rectifier, and then converted to AC power with variable voltage and variable frequency to rotate the induction motor at the desired speed. Inverter devices that operate at high speeds are often used. When we want to rapidly decelerate or stop this induction motor, we apply electric braking.
From the standpoint of energy conservation, a so-called regenerative braking system is desirable in which the kinetic energy possessed by the motor is returned to the three-phase AC power source as electric power. As a rule, an inverter made of a switching element such as a transistor is connected in parallel to the above-mentioned rectifier and used for regenerative braking.

第1図に回生制動可能なインバータ装置の回路図であっ
て、1なる第1相と2なる第2相と3なる第3相でなる
3相交流回路からの交流電力Y30なる整流器で直流電
力に整流する。この直流電力は平滑コンデンサ31の作
用により平滑されたのちPWMインバータ32により可
変電圧可変周波数の交流電力に変換、されて、誘導電動
機33を駆動する。回生制動を行なうときは、整流器3
0に並列されているトランジスタインバータ34の各ア
ームU、V、W、X、Y、Zyr3相交流電源1゜2.
3の電圧位相に同期してオン・オフさせることにより、
3相交流電源1,2.3へ電力を返還できる。35はト
ランジスタインバータ34が動作中に、突入電流な抑制
するための電流制限抵抗である。
FIG. 1 is a circuit diagram of an inverter device capable of regenerative braking, in which AC power from a three-phase AC circuit consisting of a first phase (1), a second phase (2), and a third phase (3) is generated. rectify to This DC power is smoothed by the action of a smoothing capacitor 31 and then converted to AC power of variable voltage and variable frequency by a PWM inverter 32 to drive an induction motor 33. When performing regenerative braking, rectifier 3
Each arm U, V, W, X, Y, Zyr of the transistor inverter 34 is connected in parallel to the three-phase AC power source 1°2.
By turning on and off in synchronization with the voltage phase of step 3,
Power can be returned to the 3-phase AC power supply 1, 2.3. 35 is a current limiting resistor for suppressing inrush current while the transistor inverter 34 is operating.

トランジスタやGToサイリスクのように自己消弧能力
を有するスイッチング素子を使用したインバータにより
交流電源へ電力?返還するには、交流電源の隣接する2
相の電圧の大小関係が切替わる瞬間にトランジスタイン
バータ34のその相に該当するアームのトランジスタt
オンあるいにオフさせるように当該トランジスタのペー
スを駆動する。しかし−接する2相の電圧の大小関係が
切替わる瞬間にトランジスタを動作させると短絡事故に
なる危険があるので、実際には隣接2相の電圧の大小関
係が切替わる瞬間を起点として、その瞬間から僅かの時
間遅れで該当するトランジスタをオンさせ、さらにタイ
マにより時間tカウントして次の相の電圧と大小関係が
切替わる直前にこのトランジスタをオフさせる。
Is the power supplied to the AC power supply by an inverter that uses switching elements with self-extinguishing ability, such as transistors or GTo Cyrisk? To return, use two adjacent AC power sources.
At the moment when the magnitude relationship of the phase voltages changes, the transistor t of the arm corresponding to that phase of the transistor inverter 34
The pace of the transistor is driven to turn it on or off. However, if a transistor is operated at the moment when the voltage relationship between the two adjacent phases changes, there is a risk of a short-circuit accident. The relevant transistor is turned on with a slight time delay from then, and the timer counts the time t, and the transistor is turned off immediately before the voltage of the next phase changes in magnitude.

上述のようにトランジスタのオンとオフのタイミングは
タイマによっているので、交流電源の周波数が変動する
と当該トランジスタがオンまたはオフするときの前述せ
る時間遅れに相当する電気角が変化することになる。ま
た電圧変動でタイマの設定時限が変化すればこれまたオ
ン・オフの電気角が変化することになる。このようにオ
ンφオフの電気角が変、化すると電源へ返還する電力が
変動する欠点があるし、さらに電気角が変化しても短絡
事故にならぬようにするためには、電圧の大小関係が切
替わる時点とトランジスタがオンまたにオフ動作をする
時点との時間間隔すなわち不感〔発明の目的〕 この発明に、多相交流回路において隣り合う2相の電圧
の大小関係が切替わる点から周波数変動や電圧変動に影
響されることなく、一定の電気角だけ移動した点な検出
する同期信号検出回wr′lir:提供することン目的
とする。
As mentioned above, the timing of turning on and off the transistor is determined by the timer, so when the frequency of the AC power source changes, the electrical angle corresponding to the time delay mentioned above when the transistor turns on or off changes. Furthermore, if the set time limit of the timer changes due to voltage fluctuations, the on/off electrical angle will also change. In this way, when the electrical angle between on and off changes, the power returned to the power supply will fluctuate, and in order to prevent a short circuit accident even if the electrical angle changes, it is necessary to adjust the voltage The time interval between the time when the relationship switches and the time when the transistor turns on or off, that is, the insensitivity [Object of the Invention] This invention has the following advantages: It is an object of the present invention to provide a synchronization signal detection circuit that detects a point that has moved by a constant electrical angle without being affected by frequency fluctuations or voltage fluctuations.

〔発明の要点〕[Key points of the invention]

この発明は、多相交流回路において、任意の1相の電圧
と、との相に隣り合う相の分圧された電圧との大小関係
が切替わる瞬間を検出することにより、不感帯の電気角
を一定のものにしようとするものである。
This invention calculates the electrical angle of the dead zone by detecting the moment when the magnitude relationship between the voltage of any one phase and the divided voltage of the phase adjacent to the phase changes in a polyphase AC circuit. It is intended to be constant.

〔発明の実施例〕[Embodiments of the invention]

第2図は多相交流@路における電圧波形の部分図である
。この第2図において、1は第1相の電圧波形であり、
2はm2相の電圧波形であるが、この第1相と第2相の
電圧の大小関係iJA点で切替わる。
FIG. 2 is a partial diagram of a voltage waveform in a polyphase AC@path. In this FIG. 2, 1 is the voltage waveform of the first phase,
2 is the voltage waveform of the m2 phase, and the voltage waveform of the first phase and the second phase is switched at the iJA point.

第1相および第2相の相電圧の波高値をEとするとき、
この第1相の相電圧を分圧してkEなる波高値にしたも
のの波形が4である(但しk[分圧比)。この4と前述
の2なる第2相の相電圧とt比較すると、その大小関係
が切替わる点はB点に移動する。このA点とB点との差
の電気角を0とすると(1)式が成立する。ただしEi
相電圧の波高値である。
When the peak value of the phase voltage of the first phase and the second phase is E,
The waveform of the phase voltage of this first phase divided into a peak value of kE is 4 (k [divider voltage ratio)]. When t is compared with this 4 and the phase voltage of the second phase, which is 2, the point where the magnitude relationship changes moves to point B. If the electrical angle of the difference between point A and point B is set to 0, then equation (1) holds true. However, Ei
This is the peak value of the phase voltage.

kE sin (ψ+a)=BSin(φ−θン ・・
・・・・・・・・・・・・・・・・(1)この(1)式
から0をめると 1−に θ”””−1(1−1−k tan ’l’ ) ””
””””””””””・・’f21この(2)式に16
いてkは分圧比、ψに検出する交流電圧の相数により定
まる角度(たとえば3相交流ではφ=π/6)であって
、このkとφはいずれも電圧と周波数に無関係な一定値
であるから、Oの値は分圧比kにより定まることがわか
る。
kE sin (ψ+a)=BSin(φ−θn...
・・・・・・・・・・・・・・・・・・(1) Subtracting 0 from this equation (1) gives 1- θ"""-1 (1-1-k tan 'l') ””
""""""""""...'f21 In this formula (2), 16
where k is the voltage division ratio, and ψ is the angle determined by the number of phases of the AC voltage to be detected (for example, φ = π/6 for three-phase AC), and both k and φ are constant values that are independent of voltage and frequency. Therefore, it can be seen that the value of O is determined by the partial pressure ratio k.

第3図は上述の原理にもとすく本発明の実施例を示す回
路図であって、3相交流電源の場合を示している。lに
この3相交流電源の第1相であり。
FIG. 3 is a circuit diagram showing an embodiment of the present invention based on the above-mentioned principle, and shows the case of a three-phase AC power supply. l is the first phase of this three-phase AC power supply.

その電圧にコンパレータ7に入力している。2と3はそ
れぞれ第2相と第3相であって、その電圧もそれぞれコ
ンパレータ8と9に入力している。
This voltage is input to the comparator 7. 2 and 3 are the second and third phases, respectively, and their voltages are also input to comparators 8 and 9, respectively.

一方第1相lの′IL圧は分圧抵抗4により分圧されこ
のちコンパレータ8に入力し、第2相2の電圧と第3相
3の電圧も、それぞれ分圧抵抗5と6により分圧された
のち、それぞれコンノくレータ9と7に入力される。こ
のとき分圧抵抗4,5.6による分圧比はすべて等しい
値kにしてお(。
On the other hand, the 'IL voltage of the first phase 1 is divided by the voltage dividing resistor 4 and then inputted to the comparator 8, and the voltage of the second phase 2 and the voltage of the third phase 3 are also divided by the voltage dividing resistors 5 and 6, respectively. After being compressed, they are input to controllers 9 and 7, respectively. At this time, the voltage dividing ratios by the voltage dividing resistors 4 and 5.6 are all set to the same value k (.

コンパレータ7について考えるト、該コンハレータフげ
第1相1の電圧と第3相3の分圧抵抗6の出力電圧が入
力されてその両電圧の大小関係が切替わる点を検出する
のであるが、この時点に第1相1の電圧と第3相3の電
圧の大小関係が切替わる時点よりも電気角でθだけ早く
なる。コンパレータ8と9についても同様である。それ
故これらコンパレータ7.8.9の信号をロジック回路
13と15に与え、ロジック回路13からの出力信号に
タイマ14により電気角でθ十dに相当する時間遅れT
14で信号を出力させる。すなわちコンパレータ7.8
.9からの信号なロジック回路13.15とタイマ14
により処理して、トランジスタインバータの各アームU
、V、W、X。
Considering the comparator 7, the voltage of the first phase 1 and the output voltage of the voltage dividing resistor 6 of the third phase 3 are input to the comparator 7, and the point where the magnitude relationship between the two voltages changes is detected. At this point, the voltage of the first phase 1 and the voltage of the third phase 3 are earlier than the point at which the magnitude relation between the voltages is switched by θ in terms of electrical angle. The same applies to comparators 8 and 9. Therefore, the signals of these comparators 7, 8, and 9 are applied to the logic circuits 13 and 15, and the output signal from the logic circuit 13 is delayed by a timer 14 corresponding to θ0d in electrical angle.
A signal is output at step 14. i.e. comparator 7.8
.. Logic circuit 13, signal from 9, 15 and timer 14
each arm U of the transistor inverter
, V, W, X.

Y、ZK[それぞれ分圧しない電圧同士で比較するとき
よりにオン信号な電気病でaだけ遅らせ(一方の電圧を
分圧すると電気角でθだけ早くなるのなりイマ14でT
14=i++αだけ遅らせているから)、オフ信号は電
気角でaだけ早くなる。
Y, ZK [When comparing voltages that are not divided, the on-signal electric disease is delayed by a (if one voltage is divided, it will be accelerated by θ in electrical angle, so in Imma 14 T
14=i++α), the off signal becomes earlier by a in electrical angle.

タイマ14の遅れ設定時間T14にごく短時間であるか
ら電圧変動や周波数変動に影響される程度はきわめて小
さい。ここでαは零よりも大であればよく、考えられる
周波数変動に対応するものできわめて小さな値でよい。
Since the delay setting time T14 of the timer 14 is a very short time, the extent to which it is affected by voltage fluctuations and frequency fluctuations is extremely small. Here, α only needs to be larger than zero, and can be a very small value that corresponds to possible frequency fluctuations.

第4図は第3図に示す本発明の実施例の動作チャートで
ある。第4図りは第1相1、第2相2、第3相3の電圧
波形と、それぞれ乞分圧抵抗4゜5.6で分圧した後の
出力電圧波形である。=!り第4図F、G、Hはそれぞ
れコンパレーク7.8・9の出力信号であり、第4図U
、V、W、X、Y。
FIG. 4 is an operation chart of the embodiment of the present invention shown in FIG. The fourth diagram shows the voltage waveforms of the first phase 1, the second phase 2, and the third phase 3, and the output voltage waveforms after each voltage is divided by a voltage dividing resistor of 4° 5.6. =! Figure 4 F, G, and H are the output signals of comparators 7, 8, and 9, respectively, and Figure 4 U
, V, W, X, Y.

zHそれぞれトランジスタインバータ34の各アームU
# V* W、X、Y+ Zの動作を示シ、テイル。
Each arm U of the transistor inverter 34
# V* Indicates the operation of W, X, Y+ Z, tail.

コンハレータフは第1相1の電圧と、第3相の分圧抵抗
6の出力電圧との比較であって、その動作が第4図のF
に示される。このコンパレーク7の信号立上りからタイ
マ14の作用により電気角で0+α、すなわちT14な
る遅れ時間の後にアームUのトランジスタにオンし、コ
ンパレータ8の立上り信号によりオフすることを示して
いる。他のアームv、w、x、y、zも同様な動作をす
る。
The conhaler tough is a comparison between the voltage of the first phase 1 and the output voltage of the voltage dividing resistor 6 of the third phase, and its operation is F in Fig. 4.
is shown. From the rise of the signal of the comparator 7, the transistor of the arm U is turned on after a delay time of 0+α in electrical angle, that is, T14, by the action of the timer 14, and is turned off by the rise of the signal of the comparator 8. Other arms v, w, x, y, and z perform similar operations.

第5図は本発明の第2の実施例を示すU略図であるが、
第3図に示す実施例と異なるところはコンパレーク10
.11.12が追加されていることと、タイマ14が削
除されていることだけであって、それ以外の参照符号な
付したものに第3図と同じであるから、その説明は省略
する。
FIG. 5 is a U schematic diagram showing the second embodiment of the present invention,
The difference from the embodiment shown in FIG. 3 is the comparator 10.
.. The only difference is that 11 and 12 are added and the timer 14 is deleted, and the other reference numerals are the same as in FIG. 3, so a description thereof will be omitted.

第5図においてコンパレータ10には第1相lの電圧と
分圧抵抗5の出力電圧とが入力されてその両電圧の大小
関係を比較している。それ故このコンパレータlOから
に、第1相1の電圧と第2相2の電圧の大小関係が切替
わる時点から電気角で0だけ遅れて切替え信号が出力さ
れる。コンパレークIIU第2相2の電圧と分圧抵抗6
の出力電圧が、またコンパレータ12は第3相3の電圧
と分圧抵抗4の出力電圧が入力されるので、それぞれ分
圧しないときに(らべて電気角で0だけ遅れた切替え信
号な出力する。 −。
In FIG. 5, the voltage of the first phase 1 and the output voltage of the voltage dividing resistor 5 are input to the comparator 10, and the magnitude relationship between the two voltages is compared. Therefore, a switching signal is outputted from the comparator 1O with a delay of 0 in electrical angle from the point in time when the magnitude relationship between the voltage of the first phase 1 and the voltage of the second phase 2 is switched. Comparator IIU second phase 2 voltage and voltage dividing resistor 6
Since the comparator 12 receives the voltage of the third phase 3 and the output voltage of the voltage dividing resistor 4, when the voltage is not divided, the output voltage is the switching signal delayed by 0 in electrical angle. -.

−−1゛ このaなる電気 角だけ遅れKfg号を利用すれば%第3図におけるタイ
マ14は不要になり、ロジック回路13と15の作用に
より、トランジスタインバータ34の各アームに適正な
不感帯を持つオンオフイぎ号を送ることができる。
--1゛ If Kfg is delayed by the electrical angle a, the timer 14 in Figure 3 becomes unnecessary, and by the action of the logic circuits 13 and 15, each arm of the transistor inverter 34 has an appropriate dead zone. You can send an on-off message.

〔発明の効果〕〔Effect of the invention〕

本発明においてに、多相交流回路の任意の1相の電圧と
、この相vcHり合った相の分圧されr、[圧との大小
関係が切替わる点なコンパレータにより検出するように
構成している。このような構成にしておくと、分圧しな
い電圧同士の大小関係が切替わる時点に対して分圧比で
定まる電気角だけ進んだ時点あるいは遅れに時点を検出
できる。この遅れあるいに進みの電気角に周波数変動や
電圧変動には無関係に常に一定であるから、上記の遅れ
あるいげ進みの電気角に相当する時間馨タイマなどでカ
ウントするのにくらべて、きわめて正確となる。たとえ
ば回生制動のJ5に直流′出力を交流電源へ返還する場
合に、上述の遅れまたは進みの電気角が外乱により変動
しないことが必要であり、本発明によれば遅れあるいニ
進みの電気角が一定であるからインバータの各アームを
オンオフさせるとき、各アームの動作が重なって短絡に
なるおそれがなく、かつ返還する電力量も変動しないな
どの効果がある。
In the present invention, the voltage of any one phase of the polyphase AC circuit is detected by a comparator at a point where the magnitude relationship between the divided voltage r and the voltage of this phase vcH is switched. ing. With such a configuration, it is possible to detect a time point that is advanced or delayed by an electrical angle determined by the voltage division ratio with respect to the time point at which the magnitude relationship between the voltages that are not divided is switched. Since this lag or lead electrical angle is always constant regardless of frequency fluctuations or voltage fluctuations, the time corresponding to the lag or lead electrical angle is counted by a timer, etc. Be extremely accurate. For example, when returning the DC' output to the AC power supply in J5 of regenerative braking, it is necessary that the above-mentioned lag or lead electrical angle does not fluctuate due to disturbance, and according to the present invention, the lag or lead electrical angle is is constant, so when turning on and off each arm of the inverter, there is no risk of short circuits due to overlapping operations of the arms, and the amount of returned power does not fluctuate.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はインバータ装置の回路図、第2図は電圧波形の
部分図である。第3図は本発明の実施例を示す回路図で
あり、第4図は第3図に示す実施例の動作チャート%第
5図は本発明の第2の実施例を示す回路図である。 1・・・第1相、2・・・第2相、3・・・第3相、4
,5゜6・・・分圧抵抗、7〜12・・・コンパレータ
、13゜15・・・ロジック回路、14・・・タイマ、
30・・・整流器、31・・・平滑コンデンサ、32・
・・PWMインバータ、33・・・誘導電動機、34・
・・トランジスタインバータ、35・・・電流制限抵抗
。 U、V、W、X、Y、Z・・・トランジスタインバータ
34の各アーム。
FIG. 1 is a circuit diagram of the inverter device, and FIG. 2 is a partial diagram of voltage waveforms. FIG. 3 is a circuit diagram showing an embodiment of the invention, and FIG. 4 is an operation chart of the embodiment shown in FIG. 3. FIG. 5 is a circuit diagram showing a second embodiment of the invention. 1...First phase, 2...Second phase, 3...Third phase, 4
,5゜6...Voltage dividing resistor, 7-12...Comparator, 13゜15...Logic circuit, 14...Timer,
30... Rectifier, 31... Smoothing capacitor, 32...
・・PWM inverter, 33・・Induction motor, 34・
...Transistor inverter, 35...Current limiting resistor. U, V, W, X, Y, Z...each arm of the transistor inverter 34.

Claims (1)

【特許請求の範囲】[Claims] 多相交流回路における隣り合う2相の電圧馨比較し5両
電圧の大小関係が切替わる点を検出する同期信号検出回
路において、任意の相の電圧を分圧する分圧器と、該分
圧器出力電圧と前記任意の相と隣り合う相の電圧との大
小関係を比較する比較器とを備えてなることを特徴とす
る同期信号検出回路。
In a synchronizing signal detection circuit that compares the voltages of two adjacent phases in a multiphase AC circuit and detects the point where the magnitude relationship between the two voltages switches, a voltage divider that divides the voltage of an arbitrary phase and the output voltage of the voltage divider are used. and a comparator that compares the magnitude relationship between the voltage of the arbitrary phase and the voltage of an adjacent phase.
JP58168033A 1983-09-12 1983-09-12 Synchronizing signal detecting circuit Granted JPS6059979A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58168033A JPS6059979A (en) 1983-09-12 1983-09-12 Synchronizing signal detecting circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58168033A JPS6059979A (en) 1983-09-12 1983-09-12 Synchronizing signal detecting circuit

Publications (2)

Publication Number Publication Date
JPS6059979A true JPS6059979A (en) 1985-04-06
JPH0410315B2 JPH0410315B2 (en) 1992-02-24

Family

ID=15860570

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58168033A Granted JPS6059979A (en) 1983-09-12 1983-09-12 Synchronizing signal detecting circuit

Country Status (1)

Country Link
JP (1) JPS6059979A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6345336A (en) * 1986-04-10 1988-02-26 Furukawa Electric Co Ltd:The Copper alloy for electronic and electric appliance and its production
DE102006011002A1 (en) * 2006-03-09 2007-09-20 Siemens Ag Control circuit for rectifier, has phase voltage measuring device with respective resistors and diodes, and tapping voltage between resistor and diode, where free contacts of resistors are linked to respective supply voltage terminals
US11255581B2 (en) * 2019-12-24 2022-02-22 Twinbird Corporation Free piston Stirling refrigerator

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6345336A (en) * 1986-04-10 1988-02-26 Furukawa Electric Co Ltd:The Copper alloy for electronic and electric appliance and its production
JPH06207233A (en) * 1986-04-10 1994-07-26 Furukawa Electric Co Ltd:The Copper alloy for electronic and electrical equipment and its production
DE102006011002A1 (en) * 2006-03-09 2007-09-20 Siemens Ag Control circuit for rectifier, has phase voltage measuring device with respective resistors and diodes, and tapping voltage between resistor and diode, where free contacts of resistors are linked to respective supply voltage terminals
DE102006011002B4 (en) * 2006-03-09 2008-01-03 Siemens Ag Control circuit for a switch of a rectifier
US11255581B2 (en) * 2019-12-24 2022-02-22 Twinbird Corporation Free piston Stirling refrigerator

Also Published As

Publication number Publication date
JPH0410315B2 (en) 1992-02-24

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