JPH0322897A - Common dc power supply device for transistor inverter group - Google Patents
Common dc power supply device for transistor inverter groupInfo
- Publication number
- JPH0322897A JPH0322897A JP1152175A JP15217589A JPH0322897A JP H0322897 A JPH0322897 A JP H0322897A JP 1152175 A JP1152175 A JP 1152175A JP 15217589 A JP15217589 A JP 15217589A JP H0322897 A JPH0322897 A JP H0322897A
- Authority
- JP
- Japan
- Prior art keywords
- common
- voltage
- circuit
- inverter
- power
- 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
Links
- 230000006698 induction Effects 0.000 claims abstract description 4
- 230000001172 regenerating effect Effects 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Landscapes
- Rectifiers (AREA)
- Control Of Ac Motors In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
本発明は複数の交流電動機を各個駆動するトランジスタ
インバータ群の共通直流電源装置に関するものである．
（従来の技術）
近年、可変速電動機を使用する電動力応用の分野で複数
のトランジスタインバータに共通の直流電源を供給する
共通電源供給方式の採用が増えてきており、この共通電
源装置には一般に逆並列サイリスタ変換装置が使用され
ている．（発明が解決しようとする課題）
トランジスタインバータ装置の共通電源装置に逆並列サ
イリスタ変換装置を使用した場合，トランジスタインバ
ータ群の運転状態がカ行から回生へ急激に変化したとき
は、直流回路の電圧変化を検出してからサイリスタ変換
装置が順方向から逆方向に切り換えられて回生動作に移
るので、切り換えの間に回生できないエネルギーによっ
て直流回路の電圧が上昇して過電圧を発生し、装置保護
のためにトリップ動作が行われ、このため安定した運転
ができないという問題がある．また、過電圧防止策とし
てインバータ装置ごとに直流回路にダミー抵抗とダミー
抵抗回路用トランジスタを設け、トランジスタインバー
タ装置の運転状態の変化によって直流回路の電圧が上昇
したら、ダミー抵抗回路用トランジスタをオンさせてダ
ミー抵抗へ電流を流し、回生エネルギーを熱エネルギー
として消費させる方法もあるが、回路が複雑になって高
価となり、また省エネルギーの観点からも問題がある．
本発明は上記の問題を考慮してなされたもので，トラン
ジスタインバータ群の運転状態急変があっても直流１！
源側の電圧が上昇しないように回生エネルギーを電源側
に戻す簡単な回路構或の共通直流電源装置を提供するこ
とを目的としている．〔発明の構成〕
（課題を解決するための手段と作用）
本発明は，トランジスタインバータ群へ直流電源を供給
するための整流器と回生エネルギーを直流回路から交流
系統へ回生するためのサイリスタインバータ装置の両者
を具備した共通直流電源装置であり、トランジスタイン
バータ群の力行から回生への運転状態の急変に対しても
サイリスタインバータ装置の位相制御を行うことによっ
て直流回路電圧を一定に保ち、安定した運転を行うこと
を可能としている．
すなわち本発明の共通電源装置は整流器によってトラン
ジスタインバータ群へ一定電圧の直流電源を供給すると
共に、サイリスタインバータ装置は，この直流電源回路
の電圧が一定になるように位相制御され、常時はサイリ
スタが導通を続けるための微小電流が流れるように位相
を絞っておき、トランジスタインバータ群がカ行から回
生へ運転状態が変化すると、直流回路の電圧が一定とな
るように位相制御を行って直流回路に発生した回生エネ
ルギーを交流電源側へ回生し、直流回路電圧が過電圧に
なるのを防止する．
（実施例）
本発明の一実施例を図に示す．
図において，複数の誘導電動機７を各個駆動するトラン
ジスタインバータ群６の共通母線１０へ共通電源装置１
内の整流器２から直流電源を供給する。[Detailed Description of the Invention] [Objective of the Invention] (Field of Industrial Application) The present invention relates to a common DC power supply device for a group of transistor inverters that individually drive a plurality of AC motors. (Prior art) In recent years, in the field of electric power applications using variable speed motors, common power supply systems that supply a common DC power source to multiple transistor inverters have been increasingly adopted. An anti-parallel thyristor conversion device is used. (Problem to be solved by the invention) When an anti-parallel thyristor conversion device is used as a common power supply device of a transistor inverter device, when the operating state of the transistor inverter group suddenly changes from power to regeneration, the voltage of the DC circuit After detecting the change, the thyristor conversion device switches from forward direction to reverse direction and moves to regenerative operation, so the voltage of the DC circuit increases due to the energy that cannot be regenerated during switching, causing an overvoltage, which is necessary to protect the device. There is a problem in that the trip operation is performed during the operation, making stable operation impossible. In addition, as a measure to prevent overvoltage, a dummy resistor and a dummy resistance circuit transistor are installed in the DC circuit for each inverter device, and when the voltage of the DC circuit increases due to changes in the operating status of the transistor inverter device, the dummy resistance circuit transistor is turned on. There is also a method of passing current through a dummy resistor and consuming the regenerated energy as thermal energy, but the circuit becomes complicated and expensive, and there are also problems from an energy saving perspective. The present invention was made in consideration of the above problem, and even if there is a sudden change in the operating condition of the transistor inverter group, the DC current remains constant.
The purpose is to provide a common DC power supply device with a simple circuit structure that returns regenerated energy to the power source side so that the voltage on the source side does not rise. [Structure of the Invention] (Means and Effects for Solving the Problems) The present invention provides a rectifier for supplying DC power to a group of transistor inverters and a thyristor inverter device for regenerating regenerated energy from a DC circuit to an AC system. This is a common DC power supply device equipped with both, and even when the operating state of the transistor inverter group suddenly changes from powering to regeneration, it maintains the DC circuit voltage constant by controlling the phase of the thyristor inverter device, ensuring stable operation. It is possible to do so. In other words, the common power supply device of the present invention supplies constant voltage DC power to the transistor inverter group using a rectifier, and the thyristor inverter device is phase controlled so that the voltage of this DC power supply circuit is constant, and the thyristor is normally conductive. The phase is narrowed down so that a minute current flows to continue the operation, and when the transistor inverter group changes its operating state from power to regeneration, phase control is performed so that the voltage in the DC circuit remains constant. This regenerated energy is regenerated to the AC power supply side to prevent the DC circuit voltage from becoming overvoltage. (Example) An example of the present invention is shown in the figure. In the figure, a common power supply 1 is connected to a common bus 10 of a transistor inverter group 6 that drives a plurality of induction motors 7, respectively.
DC power is supplied from the rectifier 2 inside.
共通電源装！Ｌ内にはさらにサイリスタインバータ装置
３を設け、直流母線の電圧検出器５によって常時直流電
圧を検出し，この直流電圧が一定になるようにインバー
タ位相制御器４によってサイリスタインバータ装［１３
の位相を制御する．インバータ位相制御器４はサイリス
タインパータ装置３に常時微小電流が流れるように位相
制御しており、トランジスタインバータ群６がカ行運転
から回生運転へ変化してその回生エネルギーによって直
流母線電圧が上昇しようとしても、インバータ位相制御
器４は直流母線電圧を一定に保つように位相制御を行う
ことにより，直流回路の回生エネルギーを応答遅れを生
ずることなく交流電源側へ回生することが可能となり、
トランジスタインバータ群６の運転状態の変化に影響さ
れない安定した直流定電圧電源を供給できる。Common power supply! A thyristor inverter device 3 is further provided in L, and a DC voltage detector 5 on the DC bus constantly detects the DC voltage, and an inverter phase controller 4 controls the thyristor inverter device [13
Control the phase of . The inverter phase controller 4 performs phase control so that a minute current always flows through the thyristor inverter device 3, and the transistor inverter group 6 changes from power operation to regenerative operation, and the regenerated energy causes the DC bus voltage to rise. However, by performing phase control to keep the DC bus voltage constant, the inverter phase controller 4 can regenerate the regenerated energy of the DC circuit to the AC power source without causing a response delay.
A stable DC constant voltage power source that is not affected by changes in the operating state of the transistor inverter group 6 can be supplied.
以上説明したように本発明によるトランジスタインバー
タ群の共通直流電源装置では，逆並列サイリスタインバ
ータ装置を使用した従来の場合に発生するトランジスタ
インバータ群のカ行運転から回生運転への移行時に発生
する回生エネルギーによる直流回路の過電圧が防止でき
、また過電圧防止策用のダミー抵抗へ電流を流して回生
エネルギーをダミー抵抗の熱エネルギーとして消費させ
る余分な回路も必要がなくなり，簡単な回路構成でトラ
ンジスタインバータ群へ安定した直流共通電源を供給す
ることができる６As explained above, in the common DC power supply device of the transistor inverter group according to the present invention, the regenerative energy generated when the transistor inverter group transitions from the power operation to the regenerative operation, which occurs in the conventional case using an anti-parallel thyristor inverter device, can be used. This eliminates the need for an extra circuit that causes current to flow through a dummy resistor for overvoltage prevention and consumes regenerated energy as heat energy in the dummy resistor, making it possible to connect transistor inverters to a group of transistor inverters with a simple circuit configuration. Capable of supplying stable DC common power 6
図は本発明の一実施例を示す回路系統図である。 １・・・共通電源装置、 ２・・・整流器， ３・・・サイリスタインバータ装置、 ４・・・位相制御器， ５・・・電圧検出器 ６・・・トランジスタインバータ群． ７・・・誘導電動機， ８・・・整流器用変圧器、 ９・・・インバータ用変圧器， １０・・・共通直流母線 The figure is a circuit system diagram showing one embodiment of the present invention. 1... common power supply device, 2... Rectifier, 3... Thyristor inverter device, 4...phase controller, 5...Voltage detector 6...Transistor inverter group. 7...Induction motor, 8... Rectifier transformer, 9...Inverter transformer, 10...Common DC bus
Claims (1)
導電動機を各個駆動するトランジスタインバータ群の直
流側共通母線に直流電圧を供給するトランジスタインバ
ータ群の共通直流電源装置において、上記共通母線に直
流電圧を供給する整流器と、上記共通母線の直流電圧が
一定となるように位相制御され、上記共通母線から交流
系統へ電力を回生すると共に常時微小電流を流している
サイリスタインバータ装置を備えたことを特徴とするト
ランジスタインバータ群の共通直流電源装置。In a common DC power supply device for a group of transistor inverters, which converts AC power from an AC system into DC power and supplies DC voltage to a common bus on the DC side of a group of transistor inverters that respectively drive a plurality of induction motors, a DC power supply is applied to the common bus. A rectifier that supplies voltage, and a thyristor inverter device that is phase-controlled so that the DC voltage of the common bus is constant, regenerates power from the common bus to the AC system, and constantly flows a small current. A common DC power supply device for a group of transistor inverters.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1152175A JPH0322897A (en) | 1989-06-16 | 1989-06-16 | Common dc power supply device for transistor inverter group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1152175A JPH0322897A (en) | 1989-06-16 | 1989-06-16 | Common dc power supply device for transistor inverter group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0322897A true JPH0322897A (en) | 1991-01-31 |
Family
ID=15534687
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1152175A Pending JPH0322897A (en) | 1989-06-16 | 1989-06-16 | Common dc power supply device for transistor inverter group |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0322897A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2399239A (en) * | 2003-03-06 | 2004-09-08 | Tamagawa Seiki Co Ltd | Servo motors with built in drive circuits |
-
1989
- 1989-06-16 JP JP1152175A patent/JPH0322897A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2399239A (en) * | 2003-03-06 | 2004-09-08 | Tamagawa Seiki Co Ltd | Servo motors with built in drive circuits |
| GB2399239B (en) * | 2003-03-06 | 2005-02-09 | Tamagawa Seiki Co Ltd | Method of driving a servo motor with a built-in drive circuit |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR950015173B1 (en) | Ac motor control apparatus | |
| JPH0348754B2 (en) | ||
| JP4126510B2 (en) | Inverter braking circuit | |
| WO2008001450A1 (en) | Regenerative braking device | |
| JP2000188897A (en) | Motor controller | |
| JP3864834B2 (en) | PWM cycloconverter | |
| JPS63154001A (en) | Application of scr in expansion blaking | |
| JP2007028752A (en) | Elevator motor controller | |
| JP2012249494A (en) | Power supply regeneration device | |
| JPH0322897A (en) | Common dc power supply device for transistor inverter group | |
| JP2005022321A (en) | Molding machine | |
| JPH1118464A (en) | Motor controller | |
| JPH06165582A (en) | Inverter unit | |
| JPH0127436Y2 (en) | ||
| JPH04145808A (en) | Energy conserving device for electric motor vehicle | |
| JP4171862B2 (en) | Elevator drive device | |
| JP2009142103A (en) | Controller of elevator | |
| JPH0937564A (en) | Uninterruptible power supply | |
| JP2003061376A (en) | Motor control apparatus | |
| JPH10239360A (en) | Excess current detection circuit | |
| RU2419953C1 (en) | Motor control device | |
| JPH07177774A (en) | Regenerative control method of motor | |
| JPH01264501A (en) | Controller of electric vehicle | |
| JPH03159501A (en) | Controller for electric vehicle | |
| JPH07308087A (en) | Braking circuit for motor |