JP2000184741A - Inverter - Google Patents

Inverter

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Publication number
JP2000184741A
JP2000184741A JP10378047A JP37804798A JP2000184741A JP 2000184741 A JP2000184741 A JP 2000184741A JP 10378047 A JP10378047 A JP 10378047A JP 37804798 A JP37804798 A JP 37804798A JP 2000184741 A JP2000184741 A JP 2000184741A
Authority
JP
Japan
Prior art keywords
inductor
capacitor
power supply
voltage
vibration
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
JP10378047A
Other languages
Japanese (ja)
Inventor
Seiji Sakuma
清二 佐久間
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.)
Hitachi Lighting Ltd
Original Assignee
Hitachi Lighting 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 Hitachi Lighting Ltd filed Critical Hitachi Lighting Ltd
Priority to JP10378047A priority Critical patent/JP2000184741A/en
Publication of JP2000184741A publication Critical patent/JP2000184741A/en
Pending legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide an inverter with a rectifying power source for operating the power source at a high power factor. SOLUTION: The inverter comprises a smoothing capacitor 1 having a large capacity of a low voltage change. The inverter also comprises a rectifying power source 2 for rectifying a voltage of an AC power source 21. The inverter also comprises a vibrating inductor 5 in series with the capacitor 1. The inverter also comprises an auxiliary inductor 3 in series with the power source 2. The inverter also comprises a switching element 6 for intermittently applying a voltage of the capacitor 1 to the inductor 5 and simultaneously intermittently applying the voltage of the power source 2 to the inductor 3. The inverter also comprises a vibrating capacitor 4 in series with the capacitor 1 or in parallel with the inductor 5 of a small capacity of a large voltage change.

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】本発明は交流電源電圧を整流
する整流電源が付属し、それが高力率で動作するインバ
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 an inverter device provided with a rectified power supply for rectifying an AC power supply voltage and operating at a high power factor.

【0002】[0002]

【従来の技術】図2の従来装置について説明する。図2
装置は電圧変動の少ない大容量の平滑用コンデンサ1を
備える。交流電源21電圧を整流する整流電源2を備え
る。平滑用コンデンサ1と直列の振動用インダクタ5を
備える。整流電源2と直列の補助インダクタ3を備え
る。平滑用コンデンサ1電圧を前記振動用インダクタ5
へ断続的に印加するスイッチング素子6を備える。平滑
用コンデンサ1を介してあるいは直に振動用インダクタ
5と並列に接続するコンデンサであって、電圧変動の大
きい小容量の振動用コンデンサ4を備える。整流電源2
・補助インダクタ3の直列回路は直に平滑用コンデンサ
1と並列に接続される。7はスイッチング素子6と逆並
列のフライホイールダイオードである。8は振動用イン
ダクタ5の両端に接続されるインバータ負荷であり、図
示のそれは点灯回路であり、放電灯81・バラスト用イ
ンダクタ82・予熱用コンデンサ83を含む。
2. Description of the Related Art A conventional apparatus shown in FIG. 2 will be described. FIG.
The apparatus includes a large-capacity smoothing capacitor 1 with little voltage fluctuation. An AC power supply 21 includes a rectified power supply 2 for rectifying the voltage. A vibration inductor 5 is provided in series with the smoothing capacitor 1. An auxiliary inductor 3 is provided in series with the rectified power supply 2. The voltage of the smoothing capacitor 1 is applied to the oscillation inductor 5.
And a switching element 6 for intermittently applying voltage to the switch. The capacitor includes a small-capacity vibration capacitor 4 which is connected in parallel with the vibration inductor 5 via the smoothing capacitor 1 or directly and has a large voltage fluctuation. Rectified power supply 2
The series circuit of the auxiliary inductor 3 is directly connected in parallel with the smoothing capacitor 1. Reference numeral 7 denotes a flywheel diode in antiparallel with the switching element 6. Reference numeral 8 denotes an inverter load connected to both ends of the vibration inductor 5, which is a lighting circuit and includes a discharge lamp 81, a ballast inductor 82, and a preheating capacitor 83.

【0003】[0003]

【発明が解決しようとする課題】図2の平滑用コンデン
サ1電圧は整流電源2電圧最大値よりもやや低いレベル
を保持する。整流電源2給電(整流電源2からの電力供
給)は整流電源2電圧(瞬時値)が平滑用コンデンサ1
電圧を越えるわずかな期間に集中する。その際の整流電
源2電流は急増急減形波形である。補助インダクタ3は
その急増急減を緩和する役割分担を負う。ほとんどは整
流電源2電圧(瞬時値)が平滑用コンデンサ1電圧を下
回る期間であり、その間には整流電源2給電はなされな
い。このため、整流電源2は導通角の少ない低力率形動
作となる。本発明の目的は整流電源が高力率で動作す
る、整流電源付属形のインバータ装置を提供することで
ある。
The level of the voltage of the smoothing capacitor 1 shown in FIG. 2 is maintained at a level slightly lower than the maximum value of the voltage of the rectified power supply 2. The rectifier power supply 2 (supply of power from the rectifier power supply 2) supplies the rectifier power supply 2 voltage (instantaneous value) to the smoothing capacitor 1.
Concentrate on small periods of time that exceed voltage. The current of the rectified power supply 2 at that time has a sudden increase / decrease waveform. The auxiliary inductor 3 has a role to mitigate the sudden increase and decrease. Most of the time is a period in which the voltage (instantaneous value) of the rectifying power supply 2 is lower than the voltage of the smoothing capacitor 1, during which time the rectifying power supply 2 is not supplied. Therefore, the rectified power supply 2 operates in a low power factor mode with a small conduction angle. SUMMARY OF THE INVENTION An object of the present invention is to provide an inverter device with a rectified power supply, which operates at a high power factor.

【0004】[0004]

【課題を解決するための手段】本発明は、電圧変動の少
ない大容量の平滑用コンデンサを備える。交流電源電圧
を整流する整流電源を備える。前記平滑用コンデンサと
直列の振動用インダクタを備える。前記整流電源と直列
の補助インダクタを備える。本発明においては、前記平
滑用コンデンサ電圧を前記振動用インダクタへ断続的に
印加し、同時に前記整流電源電圧を前記補助インダクタ
へ断続的に印加するスイッチング素子を備える。前記平
滑用コンデンサを介して、あるいは直に前記振動用イン
ダクタと並列に接続するコンデンサであって電圧変動の
大きい小容量の振動用コンデンサを備える。
According to the present invention, a large-capacity smoothing capacitor having a small voltage fluctuation is provided. A rectifying power supply for rectifying the AC power supply voltage is provided. And a vibration inductor in series with the smoothing capacitor. An auxiliary inductor is provided in series with the rectified power supply. According to the present invention, there is provided a switching element for intermittently applying the smoothing capacitor voltage to the oscillation inductor and simultaneously applying the rectified power supply voltage to the auxiliary inductor. A capacitor connected to the vibration inductor via the smoothing capacitor or directly in parallel with the vibration inductor and having a small voltage and a large capacitance is provided.

【0005】[0005]

【発明の実施の形態】図1を用い、本発明の実施形態に
ついて説明する。本発明に係る図1のインバータ装置
は、電圧変動の少ない大容量の平滑用コンデンサ1を備
える。交流電源21電圧を整流する整流電源2を備え
る。平滑用コンデンサ1と直列の振動用インダクタ5を
備える。整流電源2と直列の補助インダクタ3を備え
る。平滑用コンデンサ1電圧を振動用インダクタ5へ断
続的に印加し、同時に整流電源2電圧を補助インダクタ
3へ断続的に印加するスイッチング素子6を備える。平
滑用コンデンサ1を介してあるいは直に振動用インダク
タ5と並列に接続するコンデンサであって、電圧変動の
大きい小容量の振動用コンデンサ4を備える。図1につ
いて補足する。平滑用コンデンサ1は相対的に大容量で
あり、振動用コンデンサ4は相対的に小容量である。整
流電源2に整流用ダイオード22〜25が付属する。ス
イッチング素子6のオン期間に平滑用コンデンサ1電圧
が振動用インダクタ5へ印加する。同時に整流電源2電
圧が補助インダクタ3へ印加する。その間に振動用イン
ダクタ5・補助インダクタ3に電磁エネルギが蓄積さ
れ、その後のインバータ動作に役立てられる。図1の振
動用コンデンサ4は平滑用コンデンサ1を介して振動用
インダクタ5へ並列に接続される。その点を改め、振動
用コンデンサ4を直に振動用インダクタ5へ並列に接続
しても同効である。インバータ動作の基本は振動用イン
ダクタ5・振動用コンデンサ4間の振動動作である。そ
の両者が直に接続される場合も、平滑用コンデンサ1を
介して間接的に接続される場合も同様である。後者の場
合も、振動用インダクタ5の高周波成分電圧は振動用コ
ンデンサ4の高周波成分電圧とほぼ一致する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. The inverter device of FIG. 1 according to the present invention includes a large-capacity smoothing capacitor 1 with small voltage fluctuation. An AC power supply 21 includes a rectified power supply 2 for rectifying the voltage. A vibration inductor 5 is provided in series with the smoothing capacitor 1. An auxiliary inductor 3 is provided in series with the rectified power supply 2. A switching element is provided which intermittently applies the voltage of the smoothing capacitor to the oscillating inductor and simultaneously applies the rectified power supply voltage to the auxiliary inductor. The capacitor includes a small-capacity vibration capacitor 4 which is connected in parallel with the vibration inductor 5 via the smoothing capacitor 1 or directly and has a large voltage fluctuation. FIG. 1 is supplemented. The smoothing capacitor 1 has a relatively large capacity, and the vibration capacitor 4 has a relatively small capacity. Rectifier diodes 22 to 25 are attached to the rectifier power supply 2. During the ON period of the switching element 6, the voltage of the smoothing capacitor 1 is applied to the oscillation inductor 5. At the same time, the voltage of the rectified power supply 2 is applied to the auxiliary inductor 3. In the meantime, the electromagnetic energy is accumulated in the oscillation inductor 5 and the auxiliary inductor 3, and is used for the subsequent inverter operation. The vibration capacitor 4 of FIG. 1 is connected in parallel to the vibration inductor 5 via the smoothing capacitor 1. In other words, the same effect can be obtained by connecting the vibration capacitor 4 directly to the vibration inductor 5 in parallel. The basic operation of the inverter is a vibration operation between the vibration inductor 5 and the vibration capacitor 4. The same applies to the case where both are connected directly and the case where they are connected indirectly via the smoothing capacitor 1. Also in the latter case, the high-frequency component voltage of the vibration inductor 5 substantially matches the high-frequency component voltage of the vibration capacitor 4.

【0006】図1の7はスイッチング素子6と逆並列の
フライホイールダイオードである。8はインバータ負荷
に相当する点灯回路であり、放電灯(蛍光ランプ)81
と、放電灯81に直列のバラスト用インダクタ82と、
放電灯81に並列の予熱用コンデンサ83を含む。イン
バータ負荷8を振動用コンデンサ4(スイッチング素子
6)と並列に接続することも可能である。この場合はイ
ンバータ負荷8と直列は配置する図外の直流成分遮断用
コンデンサを補う。図1装置は次のように動作する。ス
イッチング素子6のオン期間に1→5→6→1の閉回路
に電流が流れる。それにより、平滑用コンデンサ1が放
電し、振動用インダクタ5に電磁エネルギが蓄積する。
同時に、2→3→6→2の閉回路に電流が流れる。それ
により、整流電源2給電がなされ、補助インダクタ3に
電磁エネルギが蓄積する。この動作はスイッチング素子
6がターンオフするまで継続する。スイッチング素子6
がターンオフすると、1→5→4→1の閉回路に電流が
流れる。それにより、平滑用コンデンサ1が放電し、振
動用インダクタ5の電磁エネルギ(始めは蓄積、その後
は放出)が変化し、振動用コンデンサ4が充電する。同
時に、2→3→4→2の閉回路に電流が流れる。それに
より、整流電源2給電がなされ、補助インダクタ3の電
磁エネルギ(始めは蓄積、その後は放出)が変化し、振
動用コンデンサ4が充電する。これらの動作は振動用イ
ンダクタ5あるいは補助インダクタ3の電磁エネルギが
空になるまで続く。
[0007] Reference numeral 7 in FIG. 1 denotes a flywheel diode in antiparallel with the switching element 6. Reference numeral 8 denotes a lighting circuit corresponding to an inverter load, and a discharge lamp (fluorescent lamp) 81
A ballast inductor 82 in series with the discharge lamp 81,
The discharge lamp 81 includes a preheating capacitor 83 in parallel with the discharge lamp 81. It is also possible to connect the inverter load 8 in parallel with the vibration capacitor 4 (switching element 6). In this case, a DC component blocking capacitor (not shown) arranged in series with the inverter load 8 is supplemented. The device of FIG. 1 operates as follows. During the ON period of the switching element 6, a current flows through a closed circuit of 1 → 5 → 6 → 1. As a result, the smoothing capacitor 1 is discharged, and electromagnetic energy is accumulated in the vibration inductor 5.
At the same time, a current flows through the closed circuit of 2 → 3 → 6 → 2. As a result, power is supplied to the rectified power supply 2, and electromagnetic energy is accumulated in the auxiliary inductor 3. This operation continues until the switching element 6 is turned off. Switching element 6
Turns off, a current flows through a closed circuit of 1 → 5 → 4 → 1. Thus, the smoothing capacitor 1 is discharged, the electromagnetic energy (accumulated at first, then released) of the vibration inductor 5 is changed, and the vibration capacitor 4 is charged. At the same time, a current flows through a closed circuit of 2 → 3 → 4 → 2. As a result, power is supplied to the rectified power supply 2, the electromagnetic energy (accumulated at first, then released) of the auxiliary inductor 3 changes, and the vibration capacitor 4 is charged. These operations continue until the electromagnetic energy of the vibration inductor 5 or the auxiliary inductor 3 becomes empty.

【0007】振動用コンデンサ4電圧が図示極性の極大
値になると、4→5→1→4の閉回路に電流が流れる。
これにより、振動用コンデンサ4が放電し、振動用イン
ダクタ5に電磁エネルギが蓄積し、平滑用コンデンサ1
が充電する。この動作は振動用コンデンサ4電圧がゼロ
になるまで続く。振動用コンデンサ4電圧がゼロになる
と、5→1→7→5の閉回路に電流が流れる。それによ
り、振動用インダクタ5の電磁エネルギが放出し、平滑
用コンデンサ1が充電する。この動作は振動用インダク
タ5の電磁エネルギが空になるまで続く。振動用インダ
クタ5の電磁エネルギが空になり、その上向き電流がゼ
ロになると、1→5→6→1および2→3→6→2の各
閉回路に電流が流れる。スイッチング素子6はその少し
前の段階で、いつでもターンオンが可能な状態に図外の
制御回路により制御される。かくして、冒頭の動作に戻
り、以下は繰り返しの動作となる。フライホイールダイ
オード7がない場合は、フライホイールダイオード7を
経由すべき電流は2→3および4の並列回路を介して流
れる。図1装置においては、スイッチング素子6のオン
期間に同期して整流電源2給電がなされる。そのため
に、整流電源2導通角が広がり、高力率化する。この仕
組みはチョッパ回路に類似する。チョッパ回路との違い
は整流電源2給電がインバータ動作・振動動作に利用さ
れる点である。整流電源2給電は平滑用コンデンサ1出
力に足され、振動動作に役立てられる。一連の振動動作
の末期に余ったエネルギを平滑用コンデンサ1へ帰還し
それを充電する。整流電源2電圧(瞬時値)が高い場合
は平滑用コンデンサ1への帰還量が増し、低い場合は少
ない帰還量となる。チョッパ回路の場合は整流電源2給
電は平滑用コンデンサ1充電にのみ利用され、その後に
平滑用コンデンサ1出力となって振動動作に役立てられ
る。図1装置の場合は振動回路を経由して平滑用コンデ
ンサ1を充電(帰還形充電)するが、その過程で振動動
作に役立てられる。このため、その過程では振動操作に
役立てられないチョッパ回路形よりも動作効率が高ま
る。この点は図1のインバータ負荷8を図外の直流成分
遮断用コンデンサを介して振動用コンデンサ4へ並列に
接続するタイプであっても同効である。
When the voltage of the oscillation capacitor 4 reaches the maximum value of the polarity shown, a current flows through a closed circuit of 4 → 5 → 1 → 4.
As a result, the vibration capacitor 4 is discharged, the electromagnetic energy is accumulated in the vibration inductor 5, and the smoothing capacitor 1 is discharged.
Charges. This operation continues until the voltage of the vibration capacitor 4 becomes zero. When the voltage of the oscillation capacitor 4 becomes zero, a current flows through a closed circuit of 5 → 1 → 7 → 5. Thereby, the electromagnetic energy of the vibration inductor 5 is released, and the smoothing capacitor 1 is charged. This operation continues until the electromagnetic energy of the vibration inductor 5 becomes empty. When the electromagnetic energy of the oscillating inductor 5 becomes empty and its upward current becomes zero, a current flows through each closed circuit of 1 → 5 → 6 → 1 and 2 → 3 → 6 → 2. The switching element 6 is controlled by a control circuit (not shown) so that it can be turned on at any time immediately before. Thus, returning to the operation at the beginning, the following is an iterative operation. Without the flywheel diode 7, the current to pass through the flywheel diode 7 would flow through 2 → 3 and 4 parallel circuits. In the apparatus shown in FIG. 1, power is supplied to the rectified power supply 2 in synchronization with the ON period of the switching element 6. For this reason, the conduction angle of the rectified power supply 2 is widened and the power factor is increased. This mechanism is similar to a chopper circuit. The difference from the chopper circuit is that the power supply from the rectified power supply 2 is used for the inverter operation and the vibration operation. The power supplied from the rectified power supply 2 is added to the output of the smoothing capacitor 1 and is used for the vibration operation. The surplus energy at the end of a series of vibration operations is fed back to the smoothing capacitor 1 to charge it. When the rectified power supply 2 voltage (instantaneous value) is high, the amount of feedback to the smoothing capacitor 1 increases, and when it is low, the amount of feedback decreases. In the case of the chopper circuit, the power supply from the rectifying power supply 2 is used only for charging the smoothing capacitor 1 and thereafter becomes the output of the smoothing capacitor 1 to be used for the vibration operation. In the case of the apparatus shown in FIG. 1, the smoothing capacitor 1 is charged (feedback type charging) via an oscillating circuit, and is used for an oscillating operation in the process. For this reason, in the process, the operation efficiency is higher than that of the chopper circuit type that cannot be used for the vibration operation. This point is the same even if the inverter load 8 shown in FIG. 1 is connected in parallel to the vibration capacitor 4 via a DC component blocking capacitor (not shown).

【0008】[0008]

【発明の効果】本発明は整流電源電圧をスイッチング素
子を介して補助インダクタへ断続的に印加する仕組みと
し、かつそれによる整流電源給電を振動用コンデンサ等
の振動動作に役立て、その後の余剰なエネルギを平滑用
コンデンサ充電のために帰還させる仕組みとしたもので
ある。これによれば、整流電源導通角が広がり、高力率
化する。また、構造が簡単で動作効率の高いインバータ
装置が得られる。
According to the present invention, the rectified power supply voltage is intermittently applied to the auxiliary inductor via the switching element, and the rectified power supply is used for the vibration operation of the vibration capacitor and the like, and the surplus energy is supplied. Is fed back for charging the smoothing capacitor. According to this, the conduction angle of the rectified power supply is widened and the power factor is increased. Further, an inverter device having a simple structure and high operation efficiency can be obtained.

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

【図1】本発明装置の回路図である。FIG. 1 is a circuit diagram of the device of the present invention.

【図2】従来装置の回路図である。FIG. 2 is a circuit diagram of a conventional device.

【符号の説明】[Explanation of symbols]

1 :平滑用コンデンサ 2 :整流電源 21:交流電源 3 :補助インダクタ 4 :振動用コンデンサ 5 :振動用インダクタ 6 :スイッチング素子 1: Smoothing capacitor 2: Rectifying power supply 21: AC power supply 3: Auxiliary inductor 4: Vibration capacitor 5: Vibration inductor 6: Switching element

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】電圧変動の少ない大容量の平滑用コンデン
サを備え、交流電源電圧を整流する整流電源を備え、前
記平滑用コンデンサと直列の振動用インダクタを備え、
前記整流電源と直列の補助インダクタを備え、前記平滑
用コンデンサ電圧を前記振動用インダクタへ断続的に印
加し同時に前記整流電源電圧を前記補助インダクタへ断
続的に印加するスイッチング素子を備え、前記平滑用コ
ンデンサを介してあるいは直に前記振動用インダクタと
並列に接続するコンデンサであって電圧変動の大きい小
容量の振動用コンデンサを備えたことを特徴とするイン
バータ装置。
A large-capacity smoothing capacitor having a small voltage fluctuation; a rectifying power supply for rectifying an AC power supply voltage; a vibration inductor in series with the smoothing capacitor;
A switching element for intermittently applying the smoothing capacitor voltage to the oscillating inductor and simultaneously applying the rectified power supply voltage to the auxiliary inductor intermittently; An inverter device comprising a small-capacity vibration capacitor having a large voltage fluctuation, which is connected in parallel with the vibration inductor via a capacitor or directly.
JP10378047A 1998-12-17 1998-12-17 Inverter Pending JP2000184741A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10378047A JP2000184741A (en) 1998-12-17 1998-12-17 Inverter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10378047A JP2000184741A (en) 1998-12-17 1998-12-17 Inverter

Publications (1)

Publication Number Publication Date
JP2000184741A true JP2000184741A (en) 2000-06-30

Family

ID=18509350

Family Applications (1)

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JP10378047A Pending JP2000184741A (en) 1998-12-17 1998-12-17 Inverter

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