JP2000312478A - Chopper - Google Patents

Chopper

Info

Publication number
JP2000312478A
JP2000312478A JP11116259A JP11625999A JP2000312478A JP 2000312478 A JP2000312478 A JP 2000312478A JP 11116259 A JP11116259 A JP 11116259A JP 11625999 A JP11625999 A JP 11625999A JP 2000312478 A JP2000312478 A JP 2000312478A
Authority
JP
Japan
Prior art keywords
voltage
signal
chopper device
modulated
output
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
JP11116259A
Other languages
Japanese (ja)
Inventor
Junichi Watanabe
渡辺  純一
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.)
Meidensha Corp
Meidensha Electric Manufacturing Co Ltd
Original Assignee
Meidensha Corp
Meidensha Electric Manufacturing Co 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 Meidensha Corp, Meidensha Electric Manufacturing Co Ltd filed Critical Meidensha Corp
Priority to JP11116259A priority Critical patent/JP2000312478A/en
Publication of JP2000312478A publication Critical patent/JP2000312478A/en
Pending legal-status Critical Current

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  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a chopper which can reduce ripples overlaid on the output voltage of a rectifier circuit on the output side. SOLUTION: A triangular wave is modulated at a DC voltage Vi, based on an output signal of a three-shape full-wave rectifier circuit 1, which is the voltage including the ripple at the input side of a step-up chopper device, to obtain a modulated triangular wave. Based on modulated triangular wave, a PWM signal S5 with its pulse width varying according to the ripple is formed. By controlling the on and off of a semiconductor switch 3 by the PWM signal S5, ripples on the output voltage V0 is reduced.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明はチョッパ装置に関
し、特に高周波電源装置に用いて有用なものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chopper device, and is particularly useful for a high-frequency power supply device.

【0002】[0002]

【従来の技術】図3は従来技術に係る降圧チョッパ装置
を示す回路図である。同図に示すように、当該降圧チョ
ッパ装置の回路本体は、三相全波整流回路1、直流コン
デンサ2、半導体スイッチ3、直流リアクトル4、還流
ダイオード5及び平滑コンデンサ6を有しており、三相
交流電源7の交流電圧を三相全波整流回路1で整流して
直流電圧を得、この直流電圧を半導体スイッチ3でO
N、OFFすることによりその電圧値を制御し、直流リ
アクトル4を介して負荷8に所定の直流電圧を印加する
ことができるようにしたものである。ここで、還流ダイ
オード5は半導体スイッチ3がOFF状態のときの直流
リアクトル4のエネルギーを放出させるためのもので、
これにより半導体スイッチ3がOFF状態であっても負
荷8に連続的に直流電流を供給することができる。
2. Description of the Related Art FIG. 3 is a circuit diagram showing a step-down chopper device according to the prior art. As shown in the figure, the circuit main body of the step-down chopper device includes a three-phase full-wave rectifier circuit 1, a DC capacitor 2, a semiconductor switch 3, a DC reactor 4, a freewheeling diode 5, and a smoothing capacitor 6. The AC voltage of the three-phase AC power supply 7 is rectified by the three-phase full-wave rectifier circuit 1 to obtain a DC voltage.
By turning off N, the voltage value is controlled so that a predetermined DC voltage can be applied to the load 8 via the DC reactor 4. Here, the return diode 5 is for releasing the energy of the DC reactor 4 when the semiconductor switch 3 is in the OFF state.
Thus, a direct current can be continuously supplied to the load 8 even when the semiconductor switch 3 is in the OFF state.

【0003】上述の如く、当該降圧チョッパ装置では、
半導体スイッチ3のON,OFF時間を制御し、V0
(Ton/(Ton+Toff ))・Vi の出力電圧V0 を得
ているが、この出力電圧V0 を一定に制御するため、制
御系を有している。すなわち、平滑コンデンサ6の両端
の電圧である出力電圧V0 と指令電圧Vset との偏差Δ
o をP1コントローラ9に入力し、その出力信号S1
と三角波発生回路10の出力信号である三角波S2 とを
コンパレータ11で比較し、この結果得られるPWM信
号S3 で半導体スイッチ3のON、OFFを制御してい
る。
[0003] As described above, in the step-down chopper device,
The ON / OFF time of the semiconductor switch 3 is controlled, and V 0 =
(T on / (T on + T off)) · V has an output voltage V 0 which, for controlling the output voltage V 0 to the constant, and a control system. That is, the deviation Δ between the output voltage V 0 , which is the voltage across the smoothing capacitor 6, and the command voltage V set.
The V o entered in the P1 controller 9, the output signal S 1
And the triangular wave S 2 is the output signal of the triangular wave generating circuit 10 compares in a comparator 11, ON the semiconductor switch 3 by the PWM signal S 3 obtained result, and controls means OFF.

【0004】[0004]

【発明が解決しようとする課題】ところが、上述の如き
従来技術に係る降圧チョッパ装置においては、三相全波
整流回路1の出力電圧にリプルがある場合、このままで
は出力側にもそのリプルが乗ってしまう。このため、入
力側には、通常大きな容量の直流コンデンサ2が必要に
なる。この結果、次の様な問題を生起する。
However, in the step-down chopper device according to the prior art as described above, when there is a ripple in the output voltage of the three-phase full-wave rectifier circuit 1, the ripple also rides on the output side as it is. Would. For this reason, a large-capacity DC capacitor 2 is usually required on the input side. As a result, the following problem occurs.

【0005】 入力側にリプルがあると出力側にもそ
のリプルが乗ってしまう。 による悪影響を防止するためには、入力側に大き
な容量の平滑用の直流コンデンサ2が必要になる。 の点に起因して当該降圧チョッパ装置の容積が大
きくなってしまう。
[0005] If there is a ripple on the input side, the ripple also rides on the output side. In order to prevent the adverse effect caused by the above, a large-capacity smoothing DC capacitor 2 is required on the input side. Due to this point, the capacity of the step-down chopper device becomes large.

【0006】本発明は、上記従来技術に鑑み、整流回路
の出力電圧にリップルが乗っていても出力側ではこれを
低減することができるチョッパ装置を提供することを目
的とする。
SUMMARY OF THE INVENTION In view of the above prior art, an object of the present invention is to provide a chopper device capable of reducing the ripple on the output side even if the output voltage of the rectifier circuit has a ripple.

【0007】上記目的を達成する本発明の構成は、整流
回路で整流して得る直流電圧をスイッチ手段でON、O
FFするとともに、このON、OFFの時間的な比率を
制御することにより所定値の直流電圧を得るチョッパ装
置において、出力電圧と指令電圧との偏差に基づく信号
とキャリア信号とを比較して得る制御信号により上記ス
イッチ手段のON、OFFを制御する際、整流回路の出
力電圧に基づく当該チョッパ装置の入力側電圧で上記キ
ャリア信号を変調し、このようにして得る被変調信号と
上記偏差に基づく信号とを比較するようにしたことを特
徴とする。
According to the configuration of the present invention that achieves the above object, a DC voltage obtained by rectification by a rectifier circuit is turned on and off by switch means.
In a chopper device that obtains a DC voltage of a predetermined value by performing FF and controlling a temporal ratio of ON and OFF, a control that obtains a signal based on a deviation between an output voltage and a command voltage and a carrier signal and performs control. When controlling ON / OFF of the switch means by a signal, the carrier signal is modulated by the input side voltage of the chopper device based on the output voltage of the rectifier circuit, and the modulated signal thus obtained and the signal based on the deviation are obtained. And a comparison is made.

【0008】[0008]

【発明の実施の形態】以下本発明の実施の形態を図面に
基づき詳細に説明する。
Embodiments of the present invention will be described below in detail with reference to the drawings.

【0009】図1に示すように、本形態に係る降圧チョ
ッパ装置は、図3に示す降圧チョッパ装置に対し、出力
電圧V0 と指令電圧Vset との偏差ΔVo に基づく出力
信号S1 と比較する信号が異なる。他の構成は図3と同
様である。そこで、図3と同一部分には同一番号を付
し、重複する説明は省略する。
As shown in FIG. 1, the step-down chopper device according to the present embodiment is different from the step-down chopper device shown in FIG. 3 in that an output signal S 1 based on a deviation ΔV o between the output voltage V 0 and the command voltage V set. The signals to be compared are different. Other configurations are the same as those in FIG. Therefore, the same portions as those in FIG. 3 are denoted by the same reference numerals, and duplicate description will be omitted.

【0010】本形態に係る降圧チョッパ装置において
は、コンパレータ11で上記出力信号S1 と被変調三角
波S4 とを比較して半導体スイッチ3のON、OFF用
のPWM信号S5 を得ている。ここで、被変調三角波S
4 は、三相全波整流回路1の出力電圧に基づく直流コン
デンサ2の両端の電圧である直流電圧Vi と三角波発生
回路10の出力信号である三角波とを掛算器12で乗算
して得る。
In the step-down chopper device according to this embodiment, the comparator 11 compares the output signal S 1 with the modulated triangular wave S 4 to obtain a PWM signal S 5 for turning on and off the semiconductor switch 3. Here, the modulated triangular wave S
4 is obtained by multiplying the triangular wave and the output signal of the three-phase full-wave rectifier circuit DC voltage V i and the triangular wave generating circuit 10 outputs a voltage across the DC capacitor 2 based on the voltage of 1 in the multiplier 12.

【0011】かかる降圧チョッパ装置においては、平滑
コンデンサ6の両端の電圧である出力電圧V0 と指令電
圧Vset との偏差ΔVo をP1コントローラ9に入力
し、その出力信号S1 と被変調三角波S4 とをコンパレ
ータ11で比較し、この結果得られるPWM信号S5
半導体スイッチ3のON、OFFを制御する。すなわ
ち、当該降圧チョッパ装置の入力側のリップルを含む電
圧で変調した被変調三角波S2 でPWM信号S5 を得て
いる。この結果、半導体スイッチ3 をON、OFFする
PWM信号S5 のパルス幅は、上記リップルに応じて変
化する。
In such a step-down chopper device, a deviation ΔV o between an output voltage V 0 , which is a voltage across the smoothing capacitor 6, and a command voltage V set is input to a P1 controller 9 and its output signal S 1 and a modulated triangular wave and S 4 compared with the comparator 11, and controls ON the semiconductor switch 3, the OFF by the PWM signal S 5 obtained result. In other words, to obtain a PWM signal S 5 a modulated triangular wave S 2 modulated by voltage including a ripple on the input side of the step-down chopper device. As a result, ON the semiconductor switch 3, the pulse width of the PWM signal S 5 to OFF will vary depending on the ripple.

【0012】[0012]

【発明の効果】以上実施の形態とともに詳細に説明した
通り、本発明によれば、当該降圧チョッパ装置の入力側
のリップルを含む電圧で変調した被変調信号でスイッチ
手段の制御信号を得ているので、この制御信号は入力側
のリップルに応じてその幅が変化する。この結果、次の
効果を得る。 出力側のリプルが減少する。 より入力側の直流コンデンサはチョッパによる高
周波リプル成分を除去するだけの容量ですむ。 電解コンデンサを使用しなくても良いため、コンデ
ンサが長寿命となる。 より当該降圧チョッパ装置の小型化を実現するこ
とができる。
As described in detail with the above embodiments, according to the present invention, the control signal of the switch means is obtained by the modulated signal modulated by the voltage including the ripple on the input side of the step-down chopper device. Therefore, the width of the control signal changes according to the ripple on the input side. As a result, the following effects are obtained. Output ripple is reduced. The DC capacitor on the input side only needs to have enough capacity to remove high-frequency ripple components due to the chopper. Since it is not necessary to use an electrolytic capacitor, the capacitor has a long life. Thus, downsizing of the step-down chopper device can be realized.

【0013】図2は図1に示す降圧チョッパ装置の出力
波形を従来技術との比較において示す波形図である。同
図に示すように、シミュレーションによる検証の結果、
同図(a)に示す従来方式のリップル率が7.7[%]
であるのに対し、本願発明のそれは、1.6%[%]と
1/5程度に抑えることが出来ることが分かった。
FIG. 2 is a waveform diagram showing an output waveform of the step-down chopper device shown in FIG. 1 in comparison with the prior art. As shown in FIG.
The ripple rate of the conventional method shown in FIG.
On the other hand, it was found that that of the present invention can be suppressed to 1.6% [%], which is about 1/5.

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

【図1】本発明の実施の形態に係る降圧チョッパ装置を
示す回路図である。
FIG. 1 is a circuit diagram showing a step-down chopper device according to an embodiment of the present invention.

【図2】図1に示す降圧チョッパ装置の出力波形を従来
技術との比較において示す波形図である。
FIG. 2 is a waveform diagram showing an output waveform of the step-down chopper device shown in FIG. 1 in comparison with a conventional technology.

【図3】従来技術に係る降圧チョッパ装置を示す回路図
である。
FIG. 3 is a circuit diagram showing a step-down chopper device according to the related art.

【符号の説明】[Explanation of symbols]

1 三相全波整流回路 2 直流コンデンサ 3 半導体スイッチ 8 負荷 10 三角波発生回路 11 コンパレータ 12 掛算器 Vi 直流電圧 V0 出力電圧 Vset 指令電圧 ΔVo 偏差 S4 被変調三角波 S5 PWM信号1 three-phase full-wave rectifier circuit 2 dc capacitor 3 semiconductor switch 8 load 10 triangular wave generating circuit 11 a comparator 12 multiplier V i DC voltage V 0 the output voltage V set command voltage [Delta] V o deviation S 4 modulated triangular wave S 5 PWM signal

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 整流回路で整流して得る直流電圧をスイ
ッチ手段でON、OFFするとともに、このON、OF
Fの時間的な比率を制御することにより所定値の直流電
圧を得るチョッパ装置において、 出力電圧と指令電圧との偏差に基づく信号とキャリア信
号とを比較して得る制御信号により上記スイッチ手段の
ON、OFFを制御する際、整流回路の出力電圧に基づ
く当該チョッパ装置の入力側電圧で上記キャリア信号を
変調し、このようにして得る被変調信号と上記偏差に基
づく信号とを比較するようにしたことを特徴とするチョ
ッパ装置。
A DC voltage obtained by rectification by a rectifier circuit is turned on and off by a switch means.
In a chopper device that obtains a DC voltage of a predetermined value by controlling a temporal ratio of F, the switch signal is turned on by a control signal obtained by comparing a signal based on a deviation between an output voltage and a command voltage with a carrier signal. , When controlling the OFF, the carrier signal is modulated by the input side voltage of the chopper device based on the output voltage of the rectifier circuit, and the modulated signal thus obtained and the signal based on the deviation are compared. A chopper device characterized by the above-mentioned.
JP11116259A 1999-04-23 1999-04-23 Chopper Pending JP2000312478A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11116259A JP2000312478A (en) 1999-04-23 1999-04-23 Chopper

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11116259A JP2000312478A (en) 1999-04-23 1999-04-23 Chopper

Publications (1)

Publication Number Publication Date
JP2000312478A true JP2000312478A (en) 2000-11-07

Family

ID=14682682

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11116259A Pending JP2000312478A (en) 1999-04-23 1999-04-23 Chopper

Country Status (1)

Country Link
JP (1) JP2000312478A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004222337A (en) * 2003-01-09 2004-08-05 Fuji Electric Holdings Co Ltd Ac-ac power converter
JP2013093990A (en) * 2011-10-26 2013-05-16 Nichicon Corp Charger
JP2013158179A (en) * 2012-01-31 2013-08-15 Nichicon Corp Charger

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004222337A (en) * 2003-01-09 2004-08-05 Fuji Electric Holdings Co Ltd Ac-ac power converter
JP2013093990A (en) * 2011-10-26 2013-05-16 Nichicon Corp Charger
JP2013158179A (en) * 2012-01-31 2013-08-15 Nichicon Corp Charger

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