JPH01136562A - Protective circuit for inverter - Google Patents

Protective circuit for inverter

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Publication number
JPH01136562A
JPH01136562A JP29365187A JP29365187A JPH01136562A JP H01136562 A JPH01136562 A JP H01136562A JP 29365187 A JP29365187 A JP 29365187A JP 29365187 A JP29365187 A JP 29365187A JP H01136562 A JPH01136562 A JP H01136562A
Authority
JP
Japan
Prior art keywords
current
switching element
current value
transistor
circuit
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
JP29365187A
Other languages
Japanese (ja)
Other versions
JPH065984B2 (en
Inventor
Masayasu Hasegawa
長谷川 雅康
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP29365187A priority Critical patent/JPH065984B2/en
Publication of JPH01136562A publication Critical patent/JPH01136562A/en
Publication of JPH065984B2 publication Critical patent/JPH065984B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

PURPOSE:To ensure overcurrent protection, by detecting a current of a smoothing circuit, and in the period when the current value is larger than a predetermined reference level by stopping the operation of a second switching element. CONSTITUTION:A voltage controlling section of a DC chopper control inverter comprises first and second transistors(Tr) 2 and 3 for performing a chopper operation of a DC power source 1, first and second diodes 4 and 5 connected in parallel to the transistors 2 and 3 respectively, a smoothing choke coil 6 and capacitor 7, and an inverter 9. The voltage controlling section feeds a current to a load, a three-phase induction motor 10. Further, provided are current detecting means 15 of the choke coil 6, a reference current value 16 with a predetermined hysteresis characteristic, current value comparing means 16 and a base signal interlocking circuit 17 for performing cutoff of the base of the second transistor 3. Thus, in the period when the current value of the smoothing circuit is more than the reference current value 16, the operation of the second transistor 3 is stopped and regenerated to the DC power source 1.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、DCチヨ・ツバPAM制御インバータ装置
に係り、特にそのDCチヨ・リパ回路のトランジスタ等
を保護する保護回路に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a DC chip PAM control inverter device, and more particularly to a protection circuit for protecting the transistors and the like of the DC chip circuit.

〔従来の技術〕[Conventional technology]

第8図は例えば従来のDCチヨ・リパ制御インバータ装
置の電圧制御部を示すプロ11.り図であり、図におい
て、(1)は回路に電源を供給する直流*S、(2)及
び(3)は直流電源(1)のチヨ・・・パ操作を行う第
1及び第2のスイッチング素子であるところの第1及び
第2のトランジスタ、(4)及び(5)は第1及び第2
のトランジスタ(2)、 (3)に各々逆並列された第
1及び第2のダイオード、(6)はチヨ+−7パ操作が
施すれ1こ直流電圧を平滑するチョークコイル、(7)
はチョークコイル(6)の出力側に設けられ平滑作用を
行うコンデンサ、(8)はコンデンサ(7)に充電され
た電荷の放電を行う抵抗器、(9)は複数のトランジス
タ等からなるインバータ回路、αQはインバータ装置の
負荷となる三相誘導電動機、αυは第1及び第2のトラ
ンジスタ(2)、 (3)の駆動信号を出力すると共に
必要があれば上記駆動信号を遮断する為のベース遮断回
路、0は第1及び第2のトランジスタ(2)。
FIG. 8 shows, for example, a voltage control section of a conventional DC Chiyo-Lipa control inverter device. In the figure, (1) is the DC*S that supplies power to the circuit, (2) and (3) are the first and second DC power supplies that operate the chopper of the DC power supply (1). The first and second transistors, which are switching elements, (4) and (5) are the first and second transistors.
The first and second diodes are connected in antiparallel to the transistors (2) and (3), respectively, (6) is a choke coil that is operated by +/-7 to smooth the DC voltage, and (7)
is a capacitor installed on the output side of the choke coil (6) to perform a smoothing action, (8) is a resistor that discharges the charge stored in the capacitor (7), and (9) is an inverter circuit consisting of multiple transistors, etc. , αQ is a three-phase induction motor that serves as the load of the inverter device, and αυ is a base that outputs the drive signal for the first and second transistors (2) and (3) and cuts off the drive signal if necessary. In the cutoff circuit, 0 is the first and second transistor (2).

(3)にチ3.リパ動作を指令する信号を出力するDC
チヨ・・・パ電圧制御回路、(2)はDCチヨ・・・パ
電圧制御回路@の出力を反転してベース遮断回路αυに
入力するNOTゲート、α引よコンデンサ(7)の両端
の電圧を検出して、該検出電圧が所定の電圧になっ15
時にベース遮断回路α旧と第1及び第2のトランジスタ
(2)、 (3)の駆動信号を停止させる信号を出力す
る直流電圧検出回路、翰はチョークコイル(6)とコン
デンサ(7)よりなる平滑回路である。
(3) ni 3. DC that outputs a signal that commands reparation operation
Chipper voltage control circuit, (2) is a NOT gate that inverts the output of the DC chopper voltage control circuit and inputs it to the base cutoff circuit αυ, the voltage across the α pull capacitor (7) is detected and the detected voltage becomes a predetermined voltage 15
A DC voltage detection circuit that outputs a signal to stop the drive signals of the base cutoff circuit α and the first and second transistors (2) and (3), and the wire consists of a choke coil (6) and a capacitor (7). It is a smoothing circuit.

次に動作について説明する。インバータ装置の出力電圧
の制御は、コンデンサ(7)の両端の電圧を変化させる
ことにより行われている。すなわち、直流電源(1)か
ら供給される直流電圧を、第1及び第2のトランジスタ
(2)、 (3)にチヨ、リハ動作を行ワせ、チヨ・リ
パ処理された直流電圧をチョークコイル(6)及びコン
デンサ(7)により平滑する。従って、上記コンデンサ
(7)の両端の電圧は、第1及び第2のトランジスタ(
2)、 (3)のチヨー’lパ動作時におけるオンデユ
ーテイ(Qn−duty)を変化させることにより実増
できることになる。
Next, the operation will be explained. The output voltage of the inverter device is controlled by changing the voltage across the capacitor (7). That is, the DC voltage supplied from the DC power source (1) is subjected to a re-repair operation to the first and second transistors (2) and (3), and the re-repaired DC voltage is applied to the choke coil. (6) and a capacitor (7) for smoothing. Therefore, the voltage across the capacitor (7) is the voltage across the first and second transistors (
By changing the on-duty (Qn-duty) during the power operation of 2) and (3), the actual increase can be achieved.

ここで、コンデンサ(7)の端子電圧■outはで表わ
される。
Here, the terminal voltage .output of the capacitor (7) is expressed by .

なお、V i n :直流重置(1)の電圧’pon:
第合のトランジスタ(2)のオンタイム Toff:第1のトランジスタ(2)のオフタイム ’l’on  、オンデユーテイ Ton+’poff 従って、コンデンサ(7)の端子電圧■outはオンデ
ユーテイに依存することが分かる。従って、DCチヨ・
リハ電圧制御回路(2)から所望のコンデンサ(7)の
端子電圧voutが得られる様にパルス信号が出力され
る。このパルス信号は、一系統はそのままで、もう一系
統はNOTゲート03に入力された後、それぞれ返ベー
ス遮断回路(ロ)に入力される。そして、その出力信号
は第4図に示す様に、それぞれ位相が1806異なった
波形となって、第1及び第2のトランジスタ(2)、 
(3)のベースに印加され、それft1.のトランジス
タにチヨ・・・パ動作を行わせ、第1のトうンジスダ(
2)のチヨ、・、パ動作によって生成されたパルス波は
、チョークコイル(6)及びコンデンサ(7)により平
滑され、所望の電圧値の純直流が得られる訳である。
In addition, V in : Voltage of DC superposition (1) 'pon:
On-time Toff of the second transistor (2): Off-time 'l'on of the first transistor (2), on-duty Ton+'poff Therefore, it can be seen that the terminal voltage ■out of the capacitor (7) depends on the on-duty. . Therefore, DC Chiyo
A pulse signal is output from the rehabilitation voltage control circuit (2) so that a desired terminal voltage vout of the capacitor (7) can be obtained. One of the pulse signals remains unchanged, and the other pulse signal is input to the NOT gate 03, and then input to the return base cutoff circuit (b). As shown in FIG. 4, the output signals have waveforms whose phases differ by 1806, respectively, and the signals are transmitted to the first and second transistors (2),
(3) is applied to the base of ft1. The first transistor (
The pulse wave generated by the above-mentioned operation in 2) is smoothed by the choke coil (6) and the capacitor (7), and a pure direct current with a desired voltage value is obtained.

さて、今何らかの原因でインバータ装置に過電流が流れ
ると、インバータ回路(9)及び第1と第2のトランジ
スタ(2)、 (3)において、ベース遮断が実行され
、上記過電流からそれぞれのトランジスタは保護される
。次に、上記過電流の原因が取り除かれ、再びインバー
タ装置を始動する際にはIJ下の様に動作する。再始動
を行う時に上記ベース遮断を解除すると、インバータ装
置はF 、/ V一定制御を行っている為、始動周波数
付近においては、第2のトランジスタ(3)はほぼ完全
にON状りにあるので、コンデンサ(7)に充電されて
いる残留電荷は、コンデンサ(7)→チョークコイル(
6)−ン第2のトランジスタ(3)というループで放電
しようとする。
Now, if an overcurrent flows through the inverter device for some reason, base cutoff is executed in the inverter circuit (9) and the first and second transistors (2) and (3), and the overcurrent is removed from each transistor. is protected. Next, the cause of the overcurrent is removed, and when the inverter device is started again, it operates as under IJ. When the base cutoff is released when restarting, the inverter device performs constant F,/V control, so the second transistor (3) is almost completely turned on near the starting frequency. , the residual charge stored in the capacitor (7) is transferred from the capacitor (7) to the choke coil (
6) - The second transistor (3) tries to discharge in the loop.

しかし、このループには電流抑制素子が挿入されていな
い為、第2のトうンジスタ(3)の絶対定格を越えTコ
ミ流が流れる可能性がある。従って、コンデンサ(7)
と並列に抵抗器(8)を接続して、上記残留介 電荷を抵抗器(8)を寓して放電すると共に、直流電圧
検出回路α→によりコンデンサ(7)の端子電圧を検出
して、該端子電圧が第2のトランジスタ(3)に過電流
を流す危険のないレベルに低下する迄、第2のトランジ
スタ(3)にベースs断回sαυを介シテヘース遮断を
かけてインタロックをとっておき、上〔発明か解決しよ
うとする問題点〕 従来のインバータ装置の保護回路は以上の様に構成され
ているので、抵抗器(8)には常時電流が流れることに
なり、定格ワ・リド数の大きな抵抗器が必要となる。又
、上記定格ワ・・・ト数を下ける為にその抵抗値を大き
くすると、コンデンサ(7)と抵抗器(8)で決まる放
電時定数が大きくなって、インバータit始i時におけ
る第2のトランジスタ(3)保護用のベースiM所時間
が長くなり、インバータ装置の運転開始時間も長くなっ
て(、/汁う等の問題点かあつ1こ。
However, since no current suppressing element is inserted in this loop, there is a possibility that the T current may exceed the absolute rating of the second transistor (3). Therefore, capacitor (7)
A resistor (8) is connected in parallel with the resistor (8) to discharge the residual charge through the resistor (8), and the terminal voltage of the capacitor (7) is detected by the DC voltage detection circuit α→. Until the terminal voltage drops to a level that does not pose the risk of overcurrent flowing through the second transistor (3), the second transistor (3) is interlocked by providing a base disconnection via the base disconnection sαυ; [Problem to be solved by the invention] Since the protection circuit of the conventional inverter device is configured as described above, current always flows through the resistor (8), and the rated voltage is exceeded. A large resistor is required. Moreover, if the resistance value is increased in order to lower the rated wattage mentioned above, the discharge time constant determined by the capacitor (7) and resistor (8) increases, and the second The time taken to protect the base transistor (3) is longer, and the time it takes to start operation of the inverter device is also longer.

この発明は上記の様な問題点ケ解消する為になされたも
ので、抵抗器を除いても過電流から第2のトランジスタ
を保護できるインバータ装置の保護回路を得ることを目
的とする。
The present invention has been made to solve the above-mentioned problems, and its object is to provide a protection circuit for an inverter device that can protect the second transistor from overcurrent even without the use of a resistor.

〔問題点を解決する1こめの手段〕 この発明に係るインバータ装置の保護回路は、直流電源
の正極ζこその入力側が接続された第1のスイッチング
素子と、該第1のスイ・・チング素子の入出力間に逆並
列接続されTこダイオードと、上記第1のスイッチング
素子の出力側にその入力側が接続されると共に、その出
力側が上記直流電源の負極側に接続された第2のスイ・
・Jチング素子と、該第2のスイ、・チング素子の入力
側にその一方が、又出力側に他方か接続された平滑回路
と、該平滑回路の電流を検出する電流検出手段と、該電
流検出手段の検出信号を所定の基準レベルと比較し、上
記検出値が上記基准レベルよりも大きい期間信号を出力
する電流比較手段と、該電流比較手段の出力信号を受信
している期間上記第2のスイ、・・チング素子の駆動信
号を停止させるインタロ・・ツク手段とを備えTこもの
である。
[First Means to Solve the Problem] The protection circuit for the inverter device according to the present invention includes a first switching element to which the input side of the positive pole ζ of the DC power supply is connected, and the first switching element. A T diode is connected in antiparallel between the input and output of the switching element, and a second switching element whose input side is connected to the output side of the first switching element and whose output side is connected to the negative electrode side of the DC power supply.
- a smoothing circuit, one of which is connected to the input side of the switching element, and the other of which is connected to the output side of the switching element, and current detection means for detecting the current of the smoothing circuit; current comparing means for comparing the detection signal of the current detecting means with a predetermined reference level and outputting a signal for a period in which the detected value is greater than the reference level; 2. This device is equipped with an interlock means for stopping the driving signal of the switching element.

〔作用〕[Effect]

この発明においては、電流比較手段が平滑回路の電流値
が所定値以上である期間において、第2のスイッチング
素子の動作を停止させ、上記所定値以上の電流を直流電
源に回生ずる。
In this invention, the current comparison means stops the operation of the second switching element during a period in which the current value of the smoothing circuit is equal to or greater than a predetermined value, and regenerates a current equal to or greater than the predetermined value to the DC power source.

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

uJ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3図と同一の符号につい
ては同一部分を示しているので説明は省略する。図にお
いて、α9はチョークコイル(6)のインブ・リド側に
挿入されて、チョークコイル(6)に流れる電流を検出
する電流検出手段、αGは予め設定されたヒステリシス
特性を有する基継電流値と、上記電流検出手段αGにて
検出されγこ検出電流値を比較して、上記基間電流値よ
りも検出電流値が大きくな−)fコ時にパルス信8を出
力する電流値比較手段、αηは上記電流値比較手段Q’
3のパルス信号を受け、第2のトランジスタ(3)のベ
ース遮断動作を行うと共番こ、正常時にはNOTゲート
(至)から出力される信号で、第2のトうンジスタ(3
)にチヨ・リパ信8を出力するインタロー9り手段であ
るところのベース信号インタロ、・・り回路である。
An embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, the same reference numerals as in FIG. 3, which shows the conventional example, indicate the same parts, so the explanation will be omitted. In the figure, α9 is a current detection means inserted into the imbrid side of the choke coil (6) to detect the current flowing through the choke coil (6), αG is a base current value having a preset hysteresis characteristic, The current value comparison means αη outputs a pulse signal 8 when the current value detected by the current detection means αG is compared and the detected current value is larger than the base current value. The above current value comparison means Q'
When the base of the second transistor (3) is cut off in response to the pulse signal No. 3, this signal is output from the NOT gate (to) during normal operation.
) is a base signal interlocution circuit which is an interlocution means for outputting a chiyo-ripa signal 8.

次に動作について説明する。なお、第2のトランジスタ
(3)の保> trh作pノ外については、従来例と向
−であるので説明は省略し、上記保護動作について説明
する。
Next, the operation will be explained. Note that the protection operation of the second transistor (3) is the same as that of the conventional example, so a description thereof will be omitted, and the above-mentioned protection operation will be explained.

今、仙ちかの原因でインバータ装置に、例えば過電流か
流れ、゛インバータ装置が停止し1こ後、上記過電乳の
原因が取り除かれて再始動を行うとする。
Now, suppose that, for example, an overcurrent flows through the inverter device due to some reason, the inverter device stops, and after a while, the inverter device is restarted after the cause of the overvoltage is removed.

コンデンサ(7)には残留電荷が充電されているので、
上記残留電荷はチョークコイル(6)のインブ・・1ト
側に向かつて流れ始める。この電流は電流検出手段α9
によって検出され、電流値比較手段αGに入力される。
Since the capacitor (7) is charged with residual charge,
The residual charge begins to flow toward the input side of the choke coil (6). This current is detected by current detection means α9
is detected and inputted to the current value comparison means αG.

電流値比較手段αGに入力された検出電流は、第2図(
fL)に示す様に、ヒステリシス特性を有する基準レベ
ルIE、■L  と比較され、基準レベルInと基準レ
ベルILの期間において、第2図(b)に示す様なパル
ス信号が、ベース信号インタロック回路αηに出力され
る。ここで、従来例と同様インバータ装置の再始動時に
は、第2のトランジスタ(3)はほぼ完全にON状態に
なっているので、上記ベース信号インタロック回路αη
は、電流値比較手段αGから出力されるパルス信号を受
けて、該パルス信号がON状態〔すなわち第2のトラン
ジスタ(3)に危険な状態が発生すると思われる電流が
チョークコイル(6)に流れている時〕の間、第2のト
ランジスタ(3)がチヨ・・・パ動作を行わない様に、
ベース遮断を行って第2のトランジスタ(3)’I=O
FF状態に保持させる。この時、チョークコイル(6)
に貯えられ1こエネルギは、第1のダイオード(4)を
介して直流電源(1)に回生される。次第にその回生さ
れる電流が減少し、電流値比較手段αGの出力が、第2
図(h)に示すOFF状態に移行すると、再度第2のト
ランジスタ(3)がONし、チヨ・ツバ状態になると共
に、電流はコンデンサ(7)→チョークコイル(6)→
第2のトランジスタ(3)のループで放電を開始する。
The detected current input to the current value comparison means αG is shown in Fig. 2 (
As shown in FIG. 2(b), the pulse signal as shown in FIG. It is output to the circuit αη. Here, as in the conventional example, when the inverter device is restarted, the second transistor (3) is almost completely turned on, so the base signal interlock circuit αη
receives the pulse signal output from the current value comparison means αG, and the pulse signal is in the ON state [that is, a current that is considered to cause a dangerous state to occur in the second transistor (3) flows to the choke coil (6)]. so that the second transistor (3) does not perform the chopper operation during the
The base is cut off and the second transistor (3)'I=O
Keep it in FF state. At this time, choke coil (6)
The energy stored in is regenerated to the DC power supply (1) via the first diode (4). The regenerated current gradually decreases, and the output of the current value comparison means αG becomes
When the state shifts to the OFF state shown in Figure (h), the second transistor (3) is turned ON again, and the current is transferred from the capacitor (7) to the choke coil (6) to the choke coil (6).
Discharge begins in the loop of the second transistor (3).

以後この様なモードを繰り返してコンデンサ(7)の電
荷は放電される。
Thereafter, such a mode is repeated to discharge the charge in the capacitor (7).

なお、上記実施例では再始動時の保護動作について説明
しTコが、回生動作時に過大な回生電流が流れ1こ時等
についても保護動作が行われることは言うまでもない。
In the above embodiment, the protective operation at the time of restart is explained, and it goes without saying that the protective operation is also performed when an excessive regenerative current flows during the regenerative operation.

〔発明の効果〕〔Effect of the invention〕

回 以上の様に、この発明によれば平滑1路の電流を検出し
て、その検出電流が所定の基準レベルよりも大きい期間
は、第2のスイッチング素子の動作を停止させる様に構
成し1こので、第2のスイ、リチング素子を過電流から
保護できる等の効果がある。
As described above, according to the present invention, the current in the smoothing path is detected and the operation of the second switching element is stopped during the period in which the detected current is greater than a predetermined reference level. This has the effect of protecting the second switch and the recessing element from overcurrent.

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

第1図はこの発明の一実施例によるDC−y−ヨ・・・
パPAM@御インバータ装置を示すプロ・リフ回路図、
第2図はこの発明の一実施例によるDCC12リパPA
M制御インバータ装置の電流値比較回路の動作図、第8
図は従来のDCC12・・パ制御インバータ装置を示す
プロ・リフ回路図、第4図は従来のDCC12・・パ制
御インバータ装置の第1及び第2のトランジスタの動作
を示すタイミング図である。 図において、(2)は第1のトランジスタ、(3)は第
2のトランジスタ、(4)は第1のダイオード、(至)
は炉 電流検出手段、αQは電外法較手段、αηはベース信号
インタロック回路、翰は平滑回路である。 なお、内申、同一符号は同一部分を示す。
FIG. 1 shows a DC-y-yo according to an embodiment of the present invention.
A pro-rif circuit diagram showing a PAM@control inverter device,
FIG. 2 shows a DCC12 Lipa PA according to an embodiment of the present invention.
Operation diagram of current value comparison circuit of M control inverter device, No. 8
FIG. 4 is a pro-ref circuit diagram showing a conventional DCC12..para controlled inverter device, and FIG. 4 is a timing diagram showing the operation of the first and second transistors of the conventional DCC12..para controlled inverter device. In the figure, (2) is the first transistor, (3) is the second transistor, (4) is the first diode, (to)
is a furnace current detection means, αQ is an electromagnetic comparison means, αη is a base signal interlock circuit, and 翺 is a smoothing circuit. Note that the same reference numerals indicate the same parts.

Claims (1)

【特許請求の範囲】[Claims] 直流電源の正極にその入力側が接続された第1のスイッ
チング素子と、該第1のスイッチング素子の入出力間に
逆並列接続されたダイオードと、上記第1のスイッチン
グ素子の出力側にその入力側が接続されると共に、その
出力側が上記直流電源の負極側に接続された第2のスイ
ッチング素子と、該第2のスイッチング素子の入力側に
その一方が、又出力側に他方が接続された平滑回路と、
該平滑回路の電流を検出して信号を出力する電流検出手
段と、該電流検出手段の検出信号を所定の基準レベルと
比較し、上記検出信号が上記基準レベルよりも大きい期
間信号を出力する電流値比較手段と、該電流値比較手段
の出力信号を受信している期間上記第2のスイッチング
素子の駆動信号を停止させるインタロック手段とを備え
たことを特徴とするインバータ装置の保護回路。
a first switching element whose input side is connected to the positive pole of the DC power supply; a diode connected in antiparallel between the input and output of the first switching element; and a diode whose input side is connected to the output side of the first switching element. a second switching element whose output side is connected to the negative electrode side of the DC power supply, and a smoothing circuit whose one side is connected to the input side of the second switching element and the other side is connected to the output side of the second switching element. and,
Current detecting means for detecting the current of the smoothing circuit and outputting a signal; and current detecting means for comparing the detection signal of the current detecting means with a predetermined reference level and outputting a signal for a period in which the detection signal is greater than the reference level. A protection circuit for an inverter device, comprising: a value comparison means; and an interlock means for stopping a drive signal for the second switching element during a period when the output signal of the current value comparison means is being received.
JP29365187A 1987-11-20 1987-11-20 Inverter device protection circuit Expired - Lifetime JPH065984B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP29365187A JPH065984B2 (en) 1987-11-20 1987-11-20 Inverter device protection circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP29365187A JPH065984B2 (en) 1987-11-20 1987-11-20 Inverter device protection circuit

Publications (2)

Publication Number Publication Date
JPH01136562A true JPH01136562A (en) 1989-05-29
JPH065984B2 JPH065984B2 (en) 1994-01-19

Family

ID=17797472

Family Applications (1)

Application Number Title Priority Date Filing Date
JP29365187A Expired - Lifetime JPH065984B2 (en) 1987-11-20 1987-11-20 Inverter device protection circuit

Country Status (1)

Country Link
JP (1) JPH065984B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2447875A (en) * 2007-03-30 2008-10-01 Wolfson Microelectronics Plc Short Circuit Protection of DC to DC converter
KR100885274B1 (en) * 2007-04-19 2009-02-26 (주)매그플러스 Inverter circuit
JP2009059715A (en) * 2008-11-14 2009-03-19 Shibaura Mechatronics Corp Power source, sputtering power source, and sputtering device
JP2009059714A (en) * 2008-11-14 2009-03-19 Shibaura Mechatronics Corp Power source, power source for sputtering, and sputtering device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2447875A (en) * 2007-03-30 2008-10-01 Wolfson Microelectronics Plc Short Circuit Protection of DC to DC converter
GB2447875B (en) * 2007-03-30 2011-07-13 Wolfson Microelectronics Plc Short circuit protection
KR100885274B1 (en) * 2007-04-19 2009-02-26 (주)매그플러스 Inverter circuit
JP2009059715A (en) * 2008-11-14 2009-03-19 Shibaura Mechatronics Corp Power source, sputtering power source, and sputtering device
JP2009059714A (en) * 2008-11-14 2009-03-19 Shibaura Mechatronics Corp Power source, power source for sputtering, and sputtering device

Also Published As

Publication number Publication date
JPH065984B2 (en) 1994-01-19

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