JPH05207736A - Converter - Google Patents

Converter

Info

Publication number
JPH05207736A
JPH05207736A JP4013074A JP1307492A JPH05207736A JP H05207736 A JPH05207736 A JP H05207736A JP 4013074 A JP4013074 A JP 4013074A JP 1307492 A JP1307492 A JP 1307492A JP H05207736 A JPH05207736 A JP H05207736A
Authority
JP
Japan
Prior art keywords
thyristor
voltage
diode
capacitor
turning
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.)
Pending
Application number
JP4013074A
Other languages
Japanese (ja)
Inventor
Takeshi Mihashi
剛 三橋
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.)
Toyo Electric Manufacturing Ltd
Original Assignee
Toyo Electric Manufacturing 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 Toyo Electric Manufacturing Ltd filed Critical Toyo Electric Manufacturing Ltd
Priority to JP4013074A priority Critical patent/JPH05207736A/en
Publication of JPH05207736A publication Critical patent/JPH05207736A/en
Pending legal-status Critical Current

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  • Dc-Dc Converters (AREA)
  • Control Of Ac Motors In General (AREA)

Abstract

PURPOSE:To suppress a current at the time of turning ON a power source and to suppress a DC voltage of an inverter by using a chopper diode as a thyristor, providing a series circuit of a diode and a resistor in parallel with the thyristor, turning OFF the thyristor at the time of turning ON the power source, and igniting the thyristor when a DC voltage reaches a predetermined value. CONSTITUTION:A charging current flows to a capacitor 6 through a resistor 11 and a diode 12 at the time of turning ON a power source. When a DC voltage reaches a predetermined value set by a setter 131 of an igniter 13, a thyristor 10 is turned ON by an output of a comparator 132 through an amplifier 133. Thus, when an inverter 7 is operated, the capacitor 6 is so controlled to be boosted by a chopper 9 through a reactor 3, a transistor 4 and the thyristor 10 that a voltage across the capacitor 6 becomes a set value set by a setter 91. Accordingly, a DC voltage of an inverter can be always suppressed to a constant by including the time of turning ON the power source.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、電圧形インバータに直
流電源を供給するコンバータ装置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a converter device for supplying a DC power supply to a voltage type inverter.

【0002】[0002]

【従来の技術】図2に従来のコンバータ装置の一例の回
路図を示す。図2において、1は交流電源、2は交流を
直流に変換する整流器、3はリアクトル、4はトランジ
スタ、5はダイオード、6はフィルタコンデンサ、7は
トランジスタブリッジで構成されたインバータ部、8は
負荷モータである。
2. Description of the Related Art FIG. 2 shows a circuit diagram of an example of a conventional converter device. In FIG. 2, 1 is an AC power supply, 2 is a rectifier that converts AC into DC, 3 is a reactor, 4 is a transistor, 5 is a diode, 6 is a filter capacitor, 7 is an inverter section composed of a transistor bridge, and 8 is a load. It is a motor.

【0003】リアクトル3,トランジスタ4,ダイオー
ド5及びチョッパ部9が昇圧チョッパ回路を構成し、負
荷であるフィルタコンデンサ6の両端電圧を検出し、設
定器91による電圧設定に対し演算部92,増幅器93により
出力電圧一定制御を行う。全波整流器94, 掛け算器95は
コンバータ入力電流を正弦波に調整する制御部で、ベー
スドライバー96を介してトランジスタ4を制御する。
The reactor 3, the transistor 4, the diode 5 and the chopper section 9 constitute a step-up chopper circuit for detecting the voltage across the filter capacitor 6 which is a load, and for the voltage setting by the setter 91, the arithmetic section 92 and the amplifier 93. The output voltage constant control is performed by. The full-wave rectifier 94 and the multiplier 95 are control units that adjust the converter input current to a sine wave, and control the transistor 4 via the base driver 96.

【0004】インバータ部7は直流を交流に変換して、
負荷モータ8を駆動する。
The inverter section 7 converts direct current into alternating current,
The load motor 8 is driven.

【0005】[0005]

【発明が解決しようとする課題】昇圧チョッパ制御は、
リアクトル3から負荷コンデンサ6に対してダイオード
5が直列に入るために、電源投入時にリアクトル3とコ
ンデンサ6とによる共振が発生し、直流電圧が2倍近く
になる欠点がある。
The boost chopper control is
Since the diode 5 is connected in series from the reactor 3 to the load capacitor 6, resonance occurs due to the reactor 3 and the capacitor 6 when the power is turned on, and the DC voltage is nearly doubled.

【0006】直流電圧が2倍近く高くなると、電解コン
デンサの耐圧、インバータ部トランジスタの耐圧を超過
し好ましくない。本発明はこの欠点を改善することを目
的としている。
If the DC voltage becomes nearly double, the withstand voltage of the electrolytic capacitor and the withstand voltage of the inverter section transistor are exceeded, which is not preferable. The present invention aims to remedy this drawback.

【0007】[0007]

【課題を解決するための手段】本発明のコンバータ装置
は、チョッパ用ダイオードに代えてサイリスタを採用
し、該サイリスタと並列に投入電流抑制用の抵抗とダイ
オードとを直列に接続したことを特徴としている。
The converter device of the present invention is characterized in that a thyristor is adopted in place of the chopper diode, and a resistor for suppressing a making current and a diode are connected in series in parallel with the thyristor. There is.

【0008】[0008]

【作用】電源投入時はサイリスタはオフし、投入電流抑
制抵抗により投入電流を抑制して、しかも直流電圧の異
常上昇を抑え、インバータ運転時にはサイリスタを常時
導通してダイオードとして作用させ、リアクトル3,ト
ランジスタ4,サイリスタ10及びチョッパ部9により昇
圧チョッパ制御させて、直流電圧一定制御を行うもので
ある。
[Function] When the power is turned on, the thyristor is turned off, the making current is suppressed by the making current suppressing resistor, and the abnormal rise of the direct current voltage is suppressed. When the inverter is in operation, the thyristor is always turned on to act as a diode. The step-up chopper control is performed by the transistor 4, the thyristor 10 and the chopper unit 9 to perform constant DC voltage control.

【0009】[0009]

【実施例】図1は本発明の一実施例の回路図であり、図
2と同一のものは同一符号で示してある。図1におい
て、サイリスタ10、抵抗11、ダイオード12、及びサイリ
スタ10の点弧回路13が本発明による部分である。増幅器
133 により増幅される比較器132 の出力によりゲート駆
動されるサイリスタ10は、比較器132 によりコンデンサ
6の両端電圧が電圧設定器131 の指令値を超すまでオフ
(非導通)である。従って、電源投入時はコンデンサ6
の電圧が所定の値に達するまで、サイリスタ10はオフで
あり、コンデンサ6には抵抗11, ダイオード12を介して
充電電流が流れる。当然トランジスタ4もオフである。
1 is a circuit diagram of an embodiment of the present invention, in which the same elements as those in FIG. 2 are designated by the same reference numerals. In FIG. 1, the thyristor 10, the resistor 11, the diode 12 and the ignition circuit 13 of the thyristor 10 are parts according to the invention. amplifier
The thyristor 10 whose gate is driven by the output of the comparator 132 amplified by 133 is off (non-conductive) until the voltage across the capacitor 6 exceeds the command value of the voltage setter 131 by the comparator 132. Therefore, when the power is turned on, the capacitor 6
The thyristor 10 is off and the charging current flows through the capacitor 6 via the resistor 11 and the diode 12 until the voltage of 1 reaches a predetermined value. Naturally, the transistor 4 is also off.

【0010】直流電圧が交流電源1の電源電圧の21/2
倍近くなると、点弧回路13が動作して、サイリスタ10は
オンとなる。
The DC voltage is 2 1/2 of the power supply voltage of the AC power supply 1.
When the number becomes nearly double, the firing circuit 13 operates and the thyristor 10 is turned on.

【0011】かくしてインバータ7が運転に入ると、コ
ンデンサ6の両端電圧を検出し、リアクトル3,トラン
ジスタ4及びサイリスタ10(常時導通)により、コンデ
ンサ6の両端電圧を一定(電源電圧の21/2 倍以上)に
なるように制御する。なお、図1では本発明の制御部
9,13をハードで説明したが、当然CPUによるソフト
対応でも可能である。
Thus, when the inverter 7 starts operating, the voltage across the capacitor 6 is detected, and the voltage across the capacitor 6 is kept constant (2 1/2 of the power supply voltage) by the reactor 3, the transistor 4 and the thyristor 10 (always conducting). Control more than twice. Although the control units 9 and 13 of the present invention are described as hardware in FIG. 1, it is naturally possible for the CPU to support software.

【0012】[0012]

【発明の効果】本発明によれば、電源投入時を含め常に
インバータ直流電圧を一定に抑えることができ、投入電
流を抑制することもでき、信頼性が高い上安全である効
果がある。
According to the present invention, the DC voltage of the inverter can be constantly kept constant even when the power is turned on, the making current can be suppressed, and there is an effect that it is highly reliable and safe.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明のコンバータ装置の一実施例の回路図で
ある。
FIG. 1 is a circuit diagram of an embodiment of a converter device of the present invention.

【図2】従来のコンバータ装置の一例の回路図である。FIG. 2 is a circuit diagram of an example of a conventional converter device.

【符号の説明】[Explanation of symbols]

1 交流電源 2 交流を直流に変換する整流器 3 リアクトル 4 トランジスタ 5 ダイオード 6 フィルタコンデンサ 7 トランジスタブリッジで構成されたインバータ部 8 負荷モータ 9 チョッパ部 10 サイリスタ 11 抵抗 12 ダイオード 13 点弧回路 91 設定器 92 演算部 93 増幅器 94 全波整流器 95 掛け算器 96 ベースドライバー 131 電圧設定器 132 比較器 133 増幅器 1 AC power supply 2 Rectifier for converting AC to DC 3 Reactor 4 Transistor 5 Diode 6 Filter capacitor 7 Inverter part composed of transistor bridge 8 Load motor 9 Chopper part 10 Thyristor 11 Resistor 12 Diode 13 Firing circuit 91 Setting device 92 Operation Part 93 Amplifier 94 Full-wave rectifier 95 Multiplier 96 Base driver 131 Voltage setting device 132 Comparator 133 Amplifier

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】交流電源を整流器により直流に変換し、該
整流器出力にリアクトル,自己消弧素子を具備して、コ
ンデンサを有する負荷に対して昇圧チョッパ制御を行う
コンバータ装置において、 前記整流器の一方の直流端子からリアクトルとサイリス
タとを直列接続して負荷に電力を供給し、それらリアク
トルとサイリスタとの中間端子と前記整流器の他方の直
流端子との間に自己消弧素子を具備し、前記サイリスタ
の両端にダイオードと抵抗器とを直列にして接続するよ
うに構成したことを特徴とするコンバータ装置。
1. A converter device for converting an alternating current power source into a direct current by a rectifier, comprising a reactor and a self-extinguishing element at the output of the rectifier, and performing step-up chopper control for a load having a capacitor. The reactor and the thyristor are connected in series from the DC terminal of to supply power to the load, and the self-extinguishing element is provided between the intermediate terminal of the reactor and the thyristor and the other DC terminal of the rectifier, and the thyristor. A converter device characterized in that a diode and a resistor are connected in series at both ends of the converter.
JP4013074A 1992-01-28 1992-01-28 Converter Pending JPH05207736A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4013074A JPH05207736A (en) 1992-01-28 1992-01-28 Converter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4013074A JPH05207736A (en) 1992-01-28 1992-01-28 Converter

Publications (1)

Publication Number Publication Date
JPH05207736A true JPH05207736A (en) 1993-08-13

Family

ID=11823009

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4013074A Pending JPH05207736A (en) 1992-01-28 1992-01-28 Converter

Country Status (1)

Country Link
JP (1) JPH05207736A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010130826A (en) * 2008-11-28 2010-06-10 Rohm Co Ltd Step-up type switching power supply unit
JP2015035890A (en) * 2013-08-08 2015-02-19 株式会社東芝 Electric vehicle power converter

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010130826A (en) * 2008-11-28 2010-06-10 Rohm Co Ltd Step-up type switching power supply unit
JP2015035890A (en) * 2013-08-08 2015-02-19 株式会社東芝 Electric vehicle power converter

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