JPS63268431A - Inverter device - Google Patents
Inverter deviceInfo
- Publication number
- JPS63268431A JPS63268431A JP62101362A JP10136287A JPS63268431A JP S63268431 A JPS63268431 A JP S63268431A JP 62101362 A JP62101362 A JP 62101362A JP 10136287 A JP10136287 A JP 10136287A JP S63268431 A JPS63268431 A JP S63268431A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- circuit
- current
- closed
- bus voltage
- 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
- 238000001514 detection method Methods 0.000 claims description 18
- 238000009499 grossing Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 2
- 241000270666 Testudines Species 0.000 description 1
- 230000017531 blood circulation Effects 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000021419 vinegar Nutrition 0.000 description 1
- 239000000052 vinegar Substances 0.000 description 1
Landscapes
- Protection Of Static Devices (AREA)
- Inverter Devices (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、交流電動機を負荷として駆動するインバー
タ装置の保護に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to protection of an inverter device that drives an AC motor as a load.
第8図は例えば従来のインバータ装置のプロ・・・り回
路図であり、(1)はインバータ装置に漕力を供給する
父流市飾である西用市伽、(2)は開閉手段である電磁
接触器等の第1の接点、(3)はダイオード等で構成さ
れる整流回路、(4)は電磁接触器等の第2のJII点
、(5)は抵抗器、(6)は平滑用のコンデンサ、(7
)はトランジスタ等のスイ1.チング素子で構成される
インバータ回路、(8)は負荷としての交流電動機、(
9)は直流母線(9aL(9h)の直流を検出するUT
等の第1の電流検出器、(10aJは交流電動機に流れ
る負荷電流を検出するCT等の第2の直流検出器、(1
0b)は交流電動機(8)に流れろ負荷電流を検出する
OT等の第8の電流検出器、a引i第1、第2及び第8
の電流検出器(9)、 (101,(10hJの検出
信号を入力する電流検出回路、@は血流母線<9&)、
(9h)の電圧を検出する直流母線電圧検出回路、(至
)はインバータ制御回路、α4はインバータ回路(7)
をドライブするベースアンプである。Figure 8 is, for example, a circuit diagram of a conventional inverter device, in which (1) is the Nishiyo Ichiga, which is a father's decoration that supplies rowing force to the inverter device, and (2) is the opening/closing means. The first contact of a certain electromagnetic contactor, (3) is a rectifier circuit consisting of a diode, etc., (4) is the second JII point of an electromagnetic contactor, (5) is a resistor, (6) is Smoothing capacitor (7
) is the switch of transistor etc.1. (8) is an AC motor as a load;
9) is the UT that detects the DC of the DC bus (9aL (9h)
(10aJ is a second DC detector such as CT that detects the load current flowing to the AC motor, (10aJ is a
0b) is an eighth current detector such as an OT that detects the load current flowing to the AC motor (8);
current detector (9), (101, (current detection circuit that inputs a detection signal of 10 hJ, @ is blood flow bus line <9&),
(9h) is a DC bus voltage detection circuit that detects the voltage, (to) is an inverter control circuit, α4 is an inverter circuit (7)
It is a bass amp that drives the.
次に動作について説明する。インバータ制御回路0に準
備信号が入力されると、第4図(a)に示す様に、先ず
第1の接点(2)が閉成され、商用11r17it”(
1)が整流回路(3)に接続されると、第4図(C)に
示す電流11が整流回路(3月で流入し、続いて第4図
(dlに示す常流iRが抵抗器(5)を介して流れ、平
滑コンデンサ(6)の充電が開始される。次に第4図(
a)に示す様に、平滑コンデンサ(6)が十分に充電さ
れる時rIrUt+が経過し1こ後に、第4図(h)に
示す様に第2の接点(4)が閉成され、第4図(e)に
示す常流11が、第2の接点(4)を介して流れ、運転
醜備が完了する。Next, the operation will be explained. When the preparation signal is input to the inverter control circuit 0, the first contact (2) is first closed as shown in FIG. 4(a), and the commercial 11r17it"(
1) is connected to the rectifier circuit (3), the current 11 shown in Fig. 4 (C) flows into the rectifier circuit (3), and then the normal current iR shown in Fig. 4 (dl) flows through the resistor ( 5) and starts charging the smoothing capacitor (6). Next, as shown in FIG.
As shown in FIG. 4(h), when the smoothing capacitor (6) is sufficiently charged, one time after rIrUt+ has elapsed, the second contact (4) is closed as shown in FIG. 4(h). The normal flow 11 shown in FIG. 4(e) flows through the second contact (4), and the operational malfunction is completed.
この後、インバータ制御回路■に運転信号が入力される
と、重圧/周波数制御あるいは、速If ajll I
IIの目的に従って、インバータ回路(7)を構成する
トランジスタの(JN、CJFF用の信号が、インバー
タ制御回路a3カ)ら出力され、この信号はベースアン
プα4Jを経て、上記トランジスタに印加され、交流鏡
綾株(8ノルyAみ1される。篤°こ°で、何らかの原
因で直流母線Q流4あるいは負荷電流が、許容値以上に
流れ1こ場合には、力1.第2あるいは第8の電流検出
器(9)、 (10す、 (10h)が、その常流を
検出して常流検出回路(6)に入力し、常流検出回路a
υから出力される信号は、ベースアンプα少を経由して
、インバータ回路(7)のトランジスタへのm動seを
遮断する様に働き、装置を保護する。又、父流覆腔機(
8)が減速する場合においては、その回生エネルギの為
、直流母線電圧vdが所定レベル以上に上昇して、装置
を破損するのを防止する為、直流母線電圧検出回路(2
)により直流母線電圧vdを検出し、上記fN様に、イ
ンバータ回路(7)のトランジスタへの駆動信号を遮断
する。After this, when the operation signal is input to the inverter control circuit (■), heavy pressure/frequency control or speed If ajll I
According to the purpose of II, the signals for JN and CJFF of the transistors constituting the inverter circuit (7) are output from the inverter control circuit a3, and this signal is applied to the transistors through the base amplifier α4J, and the AC In this case, for some reason, the DC bus Q current 4 or the load current flows beyond the allowable value, and in this case, the force 1. The current detectors (9), (10s, (10h)) detect the normal current and input it to the normal current detection circuit (6), and the normal current detection circuit a
The signal output from υ passes through the base amplifier α and acts to block the m-movement SE to the transistor of the inverter circuit (7), thereby protecting the device. Also, my father's overturning machine (
8) decelerates, the DC bus voltage detection circuit (2
) detects the DC bus voltage vd, and cuts off the drive signal to the transistor of the inverter circuit (7) as described above fN.
次に、不測の事故等(ζより、インバータ回路(7)の
上、下のトランジスタが短絡破損した場合について説明
する。インバータmt+御回路(至)に醜備信号が入力
されろと、第5図(a)に示す様に、先ず第1の接点(
2)が閉成され、商用f # (1)が整流回路(3)
に接続されると、インバータ回路(7)のトランジスタ
への駆動信号が出力されていないにも拘らず、トランジ
スタが短絡破損している為、商用IF源(1)力)ら整
流回路(3)Gζは、第5図((1)に示す常流i+が
流入し、又、整流回路(3)からは、整流回路(3)−
抵抗器(5)−第1の電流検出器(9)−インバータ回
路(7)−整流回路(3)の経由で、第5因(d)に示
す様に主に抵抗器(5)で制限され1こ常流iRが流れ
続ける。Next, we will explain an unexpected accident (from ζ, the case where the upper and lower transistors of the inverter circuit (7) are short-circuited and damaged. As shown in Figure (a), first, the first contact (
2) is closed, and the commercial f # (1) is the rectifier circuit (3)
Even though the drive signal to the transistor of the inverter circuit (7) is not output, the transistor is short-circuited and damaged, so the commercial IF source (1) is connected to the rectifier circuit (3). The normal current i+ shown in FIG. 5 ((1) flows into Gζ, and the rectifier circuit (3)-
Via resistor (5) - first current detector (9) - inverter circuit (7) - rectifier circuit (3), mainly limited by resistor (5) as shown in the fifth factor (d) However, one normal current iR continues to flow.
抵抗器(5)は本来平滑コンデンサ(6)への充室宇流
を抑制し、整流回路(3)を構成するダイオードが、こ
の充電時の常流によっで破損しない様に選定されている
ので、上記経路で流れる電流を、第1の電流検出器(9
)が検出していても常流検出回路αDの保護か作は行わ
れない。続いて、第5図(h) 番ζ示す様に、時間t
l後に第2の接点(4)が閉成されると、抵抗器(5)
は第2の接点(4)でバイパスされろ為、回路に流れる
rI流i+、itは、商用電源(1)の内部インピー々
ンス及び配線インピーゆンス番ζよって制限される電流
まで急激に増加するので、第1の電流検出器(9)と電
流検出回路α力がこれを検出し、インバータ制御回路(
2)の作動により、第1の接点(2)に開成信号を送出
する。この信号を受は第1の接点が開成動作に入って、
整流(ロ)路(3)を商用市酢(1)から遮断して、装
置を破損力)ら保護する。The resistor (5) originally suppresses the current flowing into the smoothing capacitor (6), and is selected so that the diodes that make up the rectifier circuit (3) are not damaged by this normal current during charging. Therefore, the current flowing through the above path is detected by the first current detector (9
) is detected, the protection of the normal current detection circuit αD is not performed. Subsequently, as shown in Figure 5 (h) number ζ, the time t
When the second contact (4) is closed after l, the resistor (5)
is bypassed at the second contact (4), so the rI current i+,it flowing in the circuit increases rapidly to the current limited by the internal impedance of the commercial power supply (1) and the wiring impedance number ζ. Therefore, the first current detector (9) and the current detection circuit α detect this, and the inverter control circuit (
2) sends an open signal to the first contact (2). Upon receiving this signal, the first contact enters the opening operation,
The rectifier (b) path (3) is isolated from commercial vinegar (1) to protect the equipment from damaging forces.
従来のインバータ装置は以上の様に構成されているので
、インバータ回路(7)のトランジスタが短絡破損を考
慮して、第1の接点(2)の遮断容量を大きく選定する
ことが必要である為コスト高となる。Since the conventional inverter device is configured as described above, it is necessary to select a large breaking capacity of the first contact (2) in consideration of short-circuit damage of the transistor of the inverter circuit (7). The cost will be high.
又、故障原因Cζ気づかず第1の接点(2)の投入を繰
り返し1こ場合には、その消耗が著しいので、信頼性力
低下する等の問題点かあっ1こ。In addition, if the first contact (2) is repeatedly closed without noticing the cause of the failure Cζ, its wear is significant and there may be problems such as reduced reliability.
この発明は上記の様な問題点を解消する為になされ1こ
もので、開閉手段の遮断容量を大きく選定することなく
保護動作が行えるインバータ装置を得ることを目的とオ
ろ。This invention was made to solve the above-mentioned problems, and its purpose is to provide an inverter device that can perform a protective operation without selecting a large breaking capacity of the switching means.
〔問題点を解決する1こめの手段〕
この発明−こ係るインバータ装置は、交流ttryAと
整流回路の間に設けられ1こ開閉手段が閉成され゛てか
らの一定時間内において、重圧検出手段1ζより、整流
回路力)らインバータ回路に供給される直流母線電圧を
検出し、その検出信号をインバータ制御回路Cζおいて
、基龜信号と比較し、上記検出信号か上記基准信号より
も低い時(ζ、上記開閉手段を開成する様にしrこもの
である。[First Means to Solve the Problem] This inverter device according to the present invention is provided between the AC ttryA and the rectifier circuit, and within a certain period of time after the opening/closing means is closed, the heavy pressure detection means 1ζ, the DC bus voltage supplied to the inverter circuit from the rectifier circuit power) is detected, and the detection signal is compared with the reference signal in the inverter control circuit Cζ, and when the detection signal is lower than the reference signal. (ζ) The above-mentioned opening/closing means is opened.
この弁明におけるインバータ装置は、インバータ制御回
路が直流母線電圧の低下を便出して、開閉手段を開成す
る1、
〔発明の実施例〕
以下、この発明の一実施例を図について説明する。第1
図において、従来例を示す第8図と同一符号は向一部分
を示すので説明は省略する。第1図tこおいて、αGは
伊1えはマイクロプロセ、・、すを用いて、自流母線電
圧検出回路@の出力信号を処理すると共に、インバータ
回路(7)の制御を行うインバータ制御回路である。In the inverter device in this defense, an inverter control circuit takes advantage of a drop in DC bus voltage and opens a switching means.1 [Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1st
In the figure, the same reference numerals as in FIG. 8, which shows the conventional example, indicate the opposite parts, so the explanation will be omitted. In Fig. 1, αG is an inverter control circuit that processes the output signal of the free current bus voltage detection circuit @ and controls the inverter circuit (7) using a microprocessor. It is.
次に動作Cζついて説′明する。インバータ回路(7)
のよ・下トランジスタか短絡破損し1こ時以外の動作は
、従来例と向−であるので説明は省略し、よRc’J:
・下トランジスタが短絡破損し1こ場合について説明す
る。インバータ制御回路(2)に準備信号が入力される
と、第2図(alに示す様に、先ず第1の接点(2)が
閉或さね、商用me(1)が整流回路(3)に接続され
ると、インバータ回路(7)の上、下のトランジスタが
短絡破損している為、商用市! (1);O)ら整流回
路(3)には、第2図(0)に示す電流凰1が流入する
。なお、第2図−2にこの部分の一部を拡大しfこ波形
を示している。又、整流回路(3)からは、整流回路(
3)−抵抗器(5)−第1の電流検出器(9)−インバ
ータ回路(7)−整流回路(3)の経路で、亀2図(d
)に示す様に主に抵抗器(5)で制限され1コ市流iR
が流れ続ける。Next, the operation Cζ will be explained. Inverter circuit (7)
The lower transistor is short-circuited and damaged.The operation other than this time is the same as the conventional example, so the explanation is omitted.Rc'J:
・Explain the case where the lower transistor is short-circuited and damaged. When the preparation signal is input to the inverter control circuit (2), as shown in FIG. When the inverter circuit (7) is connected to the rectifier circuit (3), the upper and lower transistors of the inverter circuit (7) are short-circuited and damaged. The current flow 1 shown in FIG. Note that FIG. 2-2 shows a partially enlarged waveform of this portion. In addition, from the rectifier circuit (3), the rectifier circuit (
3) - Resistor (5) - First current detector (9) - Inverter circuit (7) - Rectifier circuit (3).
), it is mainly limited by the resistor (5).
continues to flow.
ここで、コンデンサ(a) ?、tインバーー90路(
7)のよ・下ノトランジスタの短絡破損によりて、その
両端が短絡されているので充電されず、直流母線電圧v
dも上昇しない。次に、第2図1+)に示す様に、正常
時におけろy?、1の接点(2)を閉成してカ・ら、第
2の接点(4)を閉成するまでの時間L1に対して、第
2因(a)に示す様にt+)toとなる時間tuにおい
て、電圧検出回路a2JIζよ?)i7]流母線電圧v
dを検出する。この検出し1こ値をインバータ制御回路
(至)において、一定レベルに達している刀)否7))
を判別し、達していlCい場合には、上記で述へた様に
第2図げ)に示す様に直流母線電圧vdが発生していな
いと判断して、第2の接点(4)が閉成される前に亀1
の接点(2)を開成さぜるので、第2の接点(4)ζζ
は、第2図(15)jζ示す様に、電流12は流れない
。Here, capacitor (a)? , t-inver-90 road (
7) Due to the short-circuit damage of the lower transistor, both ends are short-circuited, so it is not charged, and the DC bus voltage V
d also does not increase. Next, as shown in Fig. 2 (1+), it is normal. , for the time L1 from closing the first contact (2) to closing the second contact (4), t+)to becomes as shown in the second factor (a). At time tu, voltage detection circuit a2JIζ? ) i7] Flow bus voltage v
d is detected. Detect this value and use it in the inverter control circuit to confirm that it has reached a certain level (7))
If it has not reached 1C, it is determined that the DC bus voltage Vd is not generated and the second contact (4) is Turtle 1 before being closed
, the second contact (4) ζζ
As shown in FIG. 2 (15)jζ, the current 12 does not flow.
以上の4ihrして、第1の接点(2)は抵抗器(5)
で制限され1コ電流を遮断するのみで、装置を破損から
保護することができろ。After the above 4ihr, the first contact (2) is the resistor (5)
It is possible to protect the equipment from damage by only interrupting one current.
又、上記男施例では過電流η)ら装置を保護する様にし
Tコが、商用市#(1)の電圧が所定常圧以下に低下し
た場合にも、装置を商用1tね(])から切り離して保
護することかで^る。In addition, in the above embodiment, the device is protected from overcurrent η), and even if the voltage of the commercial city #(1) drops below the predetermined normal pressure, the device is protected from the commercial 1t(]). It's best to protect it by separating it from it.
以上の様瘉ζ、この発明によれは囲閉十段閉成後の一定
時間内薯ζ、頂部母線電圧を検出し、その検出信号と基
部信号とを比咬し、上記検出信号が基準45号よりも低
い時に開閉手段を開成して、整流回路への交流入力市源
を遮断する様に#4aしγこのア、インバータ回路のス
イ9チンク素子カffl M m損しr、=場合でも、
開閉手段の遍断容鳳を大きくしなくても、インバータ装
置を確実に保護τ′きるという効果がある。According to the present invention, the top bus voltage is detected within a certain period of time after the ten-stage enclosure is closed, and the detected signal is compared with the base signal, so that the detected signal is the reference 45. The opening/closing means is opened to cut off the AC input source to the rectifier circuit when the voltage is lower than the current value.
There is an effect that the inverter device can be reliably protected τ' without increasing the cross-sectional capacity of the opening/closing means.
fa l INはこの発明の一実施例によるインバータ
装置を示すブロー・り回路図、第2図はこの発明の一実
施例による保護動作の様子を示す波形図、第8図は従来
のインバータ装置を示すプロ、・・り回路図、第4図は
従来のインバータ装置の正常運転時G(おける波形図、
第5図は従来のインバータ装置の保護動作の様子を示す
波形図である。
図において、(2)は第1の接点、@は直流母線電圧検
出回路、α9はインバータ制御回路でJする。
なお、図中同一符号は同一部分を示す。fa l IN is a blow circuit diagram showing an inverter device according to an embodiment of the present invention, FIG. 2 is a waveform diagram showing a protective operation according to an embodiment of the present invention, and FIG. The circuit diagram shown in Figure 4 is a waveform diagram of the conventional inverter during normal operation.
FIG. 5 is a waveform diagram showing the protection operation of a conventional inverter device. In the figure, (2) is the first contact, @ is the DC bus voltage detection circuit, and α9 is the inverter control circuit. Note that the same reference numerals in the figures indicate the same parts.
Claims (1)
られた開閉手段と、上記整流回路から、交流電動機を駆
動するインバータ回路に供給される直流母線電圧を検出
する電圧検出手段と、上記開閉手段の閉成後の一定時間
内において、上記電圧検出手段の検出信号を基準信号と
比較し、上記検出信号が上記基準信号よりも低い時に、
上記開閉手段を開成させるインバータ制御回路とを備え
てなることを特徴とするインバータ装置。a switching means provided between an AC power source and a rectifier circuit that rectifies the AC power source; a voltage detection means that detects a DC bus voltage supplied from the rectifier circuit to an inverter circuit that drives an AC motor; Compare the detection signal of the voltage detection means with a reference signal within a certain period of time after closing the opening/closing means, and when the detection signal is lower than the reference signal,
An inverter device comprising: an inverter control circuit that opens the opening/closing means.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62101362A JPH0767231B2 (en) | 1987-04-24 | 1987-04-24 | Inverter device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62101362A JPH0767231B2 (en) | 1987-04-24 | 1987-04-24 | Inverter device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS63268431A true JPS63268431A (en) | 1988-11-07 |
JPH0767231B2 JPH0767231B2 (en) | 1995-07-19 |
Family
ID=14298721
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62101362A Expired - Lifetime JPH0767231B2 (en) | 1987-04-24 | 1987-04-24 | Inverter device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0767231B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05336759A (en) * | 1992-05-29 | 1993-12-17 | Mitsubishi Electric Corp | Inverter |
EP2093871A1 (en) * | 2008-02-21 | 2009-08-26 | Schneider Toshiba Inverter Europe SAS | Device for protecting a speed controller against overcurrent |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114916160A (en) | 2021-02-07 | 2022-08-16 | 华为数字能源技术有限公司 | Power adapter |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60204223A (en) * | 1984-03-27 | 1985-10-15 | 三菱電機株式会社 | Power source circuit device |
JPS61231829A (en) * | 1985-04-05 | 1986-10-16 | 株式会社日立製作所 | Protector for power source circuit |
-
1987
- 1987-04-24 JP JP62101362A patent/JPH0767231B2/en not_active Expired - Lifetime
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60204223A (en) * | 1984-03-27 | 1985-10-15 | 三菱電機株式会社 | Power source circuit device |
JPS61231829A (en) * | 1985-04-05 | 1986-10-16 | 株式会社日立製作所 | Protector for power source circuit |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05336759A (en) * | 1992-05-29 | 1993-12-17 | Mitsubishi Electric Corp | Inverter |
EP2093871A1 (en) * | 2008-02-21 | 2009-08-26 | Schneider Toshiba Inverter Europe SAS | Device for protecting a speed controller against overcurrent |
FR2928056A1 (en) * | 2008-02-21 | 2009-08-28 | Schneider Toshiba Inverter | DEVICE FOR PROTECTING A SPEED VARIATOR AGAINST OVERCURRENTS. |
US7965484B2 (en) | 2008-02-21 | 2011-06-21 | Schneider Toshiba Inverter Europe Sas | Device for protecting a speed controller against overcurrent |
Also Published As
Publication number | Publication date |
---|---|
JPH0767231B2 (en) | 1995-07-19 |
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