JPH06226140A - Electric power source device for electric dust collecting apparatus - Google Patents
Electric power source device for electric dust collecting apparatusInfo
- Publication number
- JPH06226140A JPH06226140A JP5018397A JP1839793A JPH06226140A JP H06226140 A JPH06226140 A JP H06226140A JP 5018397 A JP5018397 A JP 5018397A JP 1839793 A JP1839793 A JP 1839793A JP H06226140 A JPH06226140 A JP H06226140A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- dust collecting
- dust
- power source
- semiconductor switch
- 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
Landscapes
- Electrostatic Separation (AREA)
- Direct Current Feeding And Distribution (AREA)
- Ac-Ac Conversion (AREA)
- Inverter Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、気体中に浮遊する微
細粒子に対し、コロナ放電によって電荷を与え、その荷
電粒子を静電気を利用して集塵用電極に集めて集塵する
電気集塵器、特にそのための電源装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrostatic precipitator in which fine particles floating in a gas are given an electric charge by corona discharge and the charged particles are collected by a dust collecting electrode by using static electricity. And a power supply therefor.
【０００２】[0002]
【従来の技術】一般に、この種の電気集塵器では、その
集塵用電極に対して直流の高電圧を必要とすることか
ら、従来は例えば図３のように構成するものが知られて
いる。なお、図３の１は電源開閉器、２は半導体スイッ
チ（電力変換器）、３は制御部、４は高圧変圧整流器、
５は電気集塵器、ＣＴ１は変流器（電流検出器）、ＤＲ
は電圧検出器である。すなわち、商用電源は電源開閉器
１を介して電力変換器２に与えられ、ここで直流電力に
変換される。この直流電力は高圧変圧整流器４内の変圧
器で昇圧された後、整流器によって整流されて直流電圧
として電気集塵器５に与えられる。2. Description of the Related Art Generally, in this type of electrostatic precipitator, a high direct current voltage is required for the dust collecting electrode, so that a conventional one having a structure as shown in FIG. 3 is known. There is. In FIG. 3, 1 is a power switch, 2 is a semiconductor switch (power converter), 3 is a control unit, 4 is a high voltage transformer / rectifier,
5 is an electrostatic precipitator, CT1 is a current transformer (current detector), DR
Is a voltage detector. That is, the commercial power supply is given to the power converter 2 via the power switch 1, and is converted into DC power here. This DC power is boosted by the transformer in the high-voltage transformer / rectifier 4, rectified by the rectifier, and provided to the electrostatic precipitator 5 as a DC voltage.
【０００３】制御部３は同期信号ＳＹに同期して動作し
ており、変流器ＣＴ１により電力変換器２の出力電流を
検出し、これを所定値となるように電力変換器２にゲー
ト信号Ｇ１を与えて位相制御を行なうようにしている。
また、電圧検出器ＤＲを介して電気集塵器５の電圧を監
視し、これによって異常放電（例えば火花放電，グロー
放電など）を検出する。The control unit 3 operates in synchronization with the synchronizing signal SY, detects the output current of the power converter 2 by the current transformer CT1, and outputs a gate signal to the power converter 2 so that the output current becomes a predetermined value. G1 is given to control the phase.
Further, the voltage of the electrostatic precipitator 5 is monitored via the voltage detector DR, and thereby an abnormal discharge (for example, spark discharge, glow discharge, etc.) is detected.
【０００４】[0004]
【発明が解決しようとする課題】ところで、上記のよう
な電力変換装置を用いた電源装置では、高抵抗の媒塵に
対して充分な集塵効率が得られないことが指摘されてい
る。なお、このためインバータの如き周波数変換装置を
用いるようにすると、今度は低抵抗の媒塵に対して充分
な集塵効率が得られないという問題が発生する。また、
電力変換装置を用いた電源装置で例えば図４（ハ）のよ
うに、電圧検出器ＤＲからの出力によって異常放電を検
出したときは、制御部３は従来は図４（ロ）のように電
力変換器２に対するゲート信号Ｇ１をしゃ断するように
しているため、高圧変圧整流器４内の変圧器出力は図４
（ニ）の点線のようになり、高圧変圧整流器４内の整流
器出力は図４（ホ）のようになって平均電圧が低下し、
集塵効率が低下するという問題もある。なお、図４
（イ）は商用電源波形を示している。By the way, it has been pointed out that the power supply device using the power conversion device as described above cannot obtain sufficient dust collection efficiency with respect to the high resistance medium dust. For this reason, if a frequency conversion device such as an inverter is used, then there arises a problem that sufficient dust collection efficiency cannot be obtained with respect to the low-resistance medium dust. Also,
When an abnormal discharge is detected by the output from the voltage detector DR in the power supply device using the power converter, as shown in FIG. 4C, for example, the control unit 3 conventionally outputs power as shown in FIG. Since the gate signal G1 to the converter 2 is cut off, the transformer output in the high voltage transformer / rectifier 4 is as shown in FIG.
As shown by the dotted line in (d), the rectifier output in the high-voltage transformer rectifier 4 becomes as shown in FIG.
There is also a problem that the dust collection efficiency decreases. Note that FIG.
(A) shows a commercial power supply waveform.
【０００５】つまり、電気集塵器の電源装置は媒塵の特
性を確認した上で決定しなければならず、燃料等の変更
で媒塵の特性が変わると、電源装置も変更する必要があ
る。また、電力変換装置を電源として用いた電気集塵器
では、異常放電時に電源をしゃ断した後、元の電圧に戻
すまでに時間がかかるため、集塵効率が低下するという
問題もある。したがって、この発明の課題は媒塵の特性
に影響されず、しかも異常放電にて電源をしゃ断した後
に元の電圧に戻すまでの時間を短縮し、集塵効率を低下
させないようにすることにある。In other words, the power supply device of the electrostatic precipitator must be determined after confirming the characteristics of the dust particles, and if the characteristics of the dust particles change due to the change of fuel etc., the power supply device also needs to be changed. . Further, in an electrostatic precipitator using the power converter as a power source, it takes time to return to the original voltage after shutting off the power source during abnormal discharge, so that there is also a problem that the dust collecting efficiency decreases. Therefore, an object of the present invention is not to be affected by the characteristics of dust particles, and to shorten the time until the voltage returns to the original voltage after shutting off the power supply due to abnormal discharge so as not to lower the dust collection efficiency. .
【０００６】[0006]
【課題を解決するための手段】このような課題を解決す
るため、この発明では、商用電源に対して半導体スイッ
チと周波数変換装置とを並列に接続し、その各々の出力
を昇圧整流した後合成することにより直流の高電圧を
得、これを集塵器の電極間に供給する電気集塵器用電源
装置において、煤塵の抵抗値に応じて前記半導体スイッ
チおよび周波数変換装置の各出力電圧を制御するととも
に、前記集塵器に異常放電が発生したときは、周波数変
換装置からの出力を一定時間しゃ断し、前記半導体スイ
ッチからの出力のみを供給することを特徴としている。In order to solve such a problem, according to the present invention, a semiconductor switch and a frequency conversion device are connected in parallel to a commercial power source, and the respective outputs are boosted and rectified and then combined. In order to obtain a high DC voltage and supply it between the electrodes of the dust collector, the power source for the electrostatic precipitator controls each output voltage of the semiconductor switch and the frequency converter according to the resistance value of the dust. At the same time, when an abnormal discharge occurs in the dust collector, the output from the frequency conversion device is cut off for a certain period of time, and only the output from the semiconductor switch is supplied.
【０００７】[0007]
【作用】半導体スイッチを用いた電力変換装置と、イン
バータの如き周波数変換装置とを併設し、その出力を重
畳して集塵器用の直流高電圧を得ることにより、媒塵の
特性に影響を受けないようにし、集塵効率を高める。[Operation] A power conversion device using a semiconductor switch and a frequency conversion device such as an inverter are provided side by side, and by superimposing the outputs thereof to obtain a high DC voltage for a dust collector, the characteristics of dust particles are affected. To improve dust collection efficiency.
【０００８】[0008]
【実施例】図１はこの発明の実施例を示すブロック図で
ある。同図からも明らかなように、この実施例は図３に
示すものに対し、商用交流を直流に変換するＡＣ／ＤＣ
変換器６と、この直流を周波数の高い交流に変換する周
波数変換装置７を付加した点が特徴である。なお、高圧
変圧整流器４には変圧器，整流器を各２つずつ設け、一
方は半導体スイッチ２からの出力を昇圧整流して直流電
圧（以下、これをベース電圧ともいう）を作り、他方は
周波数変換装置７からの交流を昇圧整流し、これをベー
ス電圧に重畳して集塵器５の電極に与えるようにしてい
る。1 is a block diagram showing an embodiment of the present invention. As is apparent from the figure, this embodiment is different from the one shown in FIG. 3 in that AC / DC for converting commercial AC into DC.
The feature is that a converter 6 and a frequency conversion device 7 for converting this direct current into an alternating current having a high frequency are added. The high-voltage transformer / rectifier 4 is provided with two transformers and two rectifiers, one of which boosts and rectifies the output from the semiconductor switch 2 to generate a DC voltage (hereinafter, also referred to as a base voltage), and the other of them has a frequency. The alternating current from the converter 7 is stepped up and rectified, and this is superposed on the base voltage and applied to the electrodes of the dust collector 5.
【０００９】また、半導体スイッチ２からの出力電圧を
検出する電圧検出器ＴＲ１、ＡＣ／ＤＣ変換器６の出力
電流を検出する電流検出器ＣＴ２、周波数変換装置７の
出力電流を検出する電流検出器ＣＴ３、周波数変換装置
７の出力電圧を検出する電圧検出器ＴＲ２、さらには集
塵器５の集塵効率を常時監視するための煤塵濃度計８を
設けている。制御部３はこれらの信号にもとづき、半導
体スイッチ２にゲート信号Ｇ１、また周波数変換装置７
にゲート信号Ｇ２をそれぞれ与えてその制御を行なうよ
うにしている。このとき、媒塵の抵抗が低い場合は、ベ
ース電圧は高く高周波電圧は低くなるように制御し、媒
塵の抵抗が高い場合は、ベース電圧は低く高周波電圧は
高くなるように制御するものとする。A voltage detector TR1 for detecting the output voltage from the semiconductor switch 2, a current detector CT2 for detecting the output current of the AC / DC converter 6, and a current detector for detecting the output current of the frequency converter 7. A CT3, a voltage detector TR2 for detecting the output voltage of the frequency conversion device 7, and a dust concentration meter 8 for constantly monitoring the dust collection efficiency of the dust collector 5 are provided. Based on these signals, the control unit 3 causes the semiconductor switch 2 to output the gate signal G1 and the frequency conversion device 7
The gate signal G2 is applied to each of them to control them. At this time, if the resistance of the dust particles is low, the base voltage is controlled to be high and the high frequency voltage is lowered. If the resistance of the dust particles is high, the base voltage is controlled to be low and the high frequency voltage is increased. To do.
【００１０】さらに、かかる装置において、例えば図２
（ホ）のように、電圧検出器ＤＲからの出力によって異
常放電を検出したときは、制御部３は図２（ロ）のよう
に周波数変換装置７に対するゲート信号Ｇ２をしゃ断し
て高い周波数の電圧の発生を停止し、半導体スイッチ２
には図２（ハ）の如く連続してゲート信号Ｇ１を与えて
図２（ニ）のようにベース電圧を確保するようにしてい
るため、集塵器５の電極に与えられる電圧は図２（ヘ）
のようになり、異常状態の時間を従来よりも短くするこ
とができる。なお、図２（イ）は商用電源波形を示して
いる。Further, in such a device, for example, FIG.
When abnormal discharge is detected by the output from the voltage detector DR as shown in (e), the control unit 3 cuts off the gate signal G2 to the frequency converter 7 as shown in FIG. Stop the generation of voltage and turn on the semiconductor switch 2
2 (c), the gate signal G1 is continuously applied to secure the base voltage as shown in FIG. 2 (d). Therefore, the voltage applied to the electrode of the dust collector 5 is as shown in FIG. (F)
As described above, the time of the abnormal state can be shortened as compared with the conventional case. Note that FIG. 2A shows a commercial power supply waveform.
【００１１】[0011]
【発明の効果】この発明によれば、ベース電圧および高
周波電圧を自動的に制御するようにしたので、如何なる
媒塵についても同一の装置から電源を供給することがで
きる。また、集塵器内部で異常が発生した場合でも、電
源をしゃ断することなく電圧を供給することができ、し
たがって、集塵効率を上げることが可能となる利点が得
られる。According to the present invention, since the base voltage and the high frequency voltage are automatically controlled, it is possible to supply power from the same device to any dust. Further, even if an abnormality occurs inside the dust collector, it is possible to supply the voltage without shutting off the power source, and therefore, there is an advantage that the dust collection efficiency can be improved.
【図１】この発明の実施例を示すブロック図である。FIG. 1 is a block diagram showing an embodiment of the present invention.
【図２】図１の動作を説明するための各部波形図であ
る。FIG. 2 is a waveform chart of each part for explaining the operation of FIG.
【図３】従来例を示すブロック図である。FIG. 3 is a block diagram showing a conventional example.
【図４】図３の動作を説明するための各部波形図であ
る。FIG. 4 is a waveform chart of each part for explaining the operation of FIG.
１…電源開閉器、２…電力変換器（半導体スイッチ）、
３…制御部、４…高圧変圧整流器、５…電気集塵器、６
…ＡＣ／ＤＣ変換器、７…周波数変換装置、８…煤塵濃
度計、ＣＴ１，ＣＴ２，ＣＴ３…電流検出器、ＴＲ１，
ＴＲ２，ＤＲ…電圧検出器、ＳＹ…同期信号、Ｇ１，Ｇ
２…ゲート信号。1 ... power switch, 2 ... power converter (semiconductor switch),
3 ... Control unit, 4 ... High-voltage transformer / rectifier, 5 ... Electrostatic precipitator, 6
... AC / DC converter, 7 ... Frequency converter, 8 ... Dust concentration meter, CT1, CT2, CT3 ... Current detector, TR1,
TR2, DR ... Voltage detector, SY ... Sync signal, G1, G
2 ... Gate signal.
Claims (1)
数変換装置とを並列に接続し、その各々の出力を昇圧整
流した後合成することにより直流の高電圧を得、これを
集塵器の電極間に供給する電気集塵器用電源装置であっ
て、 煤塵の抵抗値に応じて前記半導体スイッチおよび周波数
変換装置の各出力電圧を制御するとともに、前記集塵器
に異常放電が発生したときは、周波数変換装置からの出
力を一定時間しゃ断し、前記半導体スイッチからの出力
のみを供給することを特徴とする電気集塵器用電源装
置。1. A semiconductor switch and a frequency converter are connected in parallel to a commercial power source, and the respective outputs are boosted and rectified and then combined to obtain a high DC voltage, which is then used as an electrode of a dust collector. A power supply device for an electrostatic precipitator to be supplied between, which controls each output voltage of the semiconductor switch and the frequency conversion device according to the resistance value of the dust, and when an abnormal discharge occurs in the precipitator, A power supply device for an electrostatic precipitator characterized in that the output from the frequency conversion device is cut off for a certain period of time and only the output from the semiconductor switch is supplied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5018397A JPH06226140A (en) | 1993-02-05 | 1993-02-05 | Electric power source device for electric dust collecting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5018397A JPH06226140A (en) | 1993-02-05 | 1993-02-05 | Electric power source device for electric dust collecting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06226140A true JPH06226140A (en) | 1994-08-16 |
Family
ID=11970566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5018397A Pending JPH06226140A (en) | 1993-02-05 | 1993-02-05 | Electric power source device for electric dust collecting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06226140A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9944201B2 (en) | 2015-12-18 | 2018-04-17 | Magna Seating Inc | Quick adjust power adjuster with tubular lead screw |
| US10099577B2 (en) | 2015-12-18 | 2018-10-16 | Magna Seating Inc | Quick adjust power adjuster with split nut |
-
1993
- 1993-02-05 JP JP5018397A patent/JPH06226140A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9944201B2 (en) | 2015-12-18 | 2018-04-17 | Magna Seating Inc | Quick adjust power adjuster with tubular lead screw |
| US10099577B2 (en) | 2015-12-18 | 2018-10-16 | Magna Seating Inc | Quick adjust power adjuster with split nut |
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