JPH10155272A - Power supply equipment - Google Patents
Power supply equipmentInfo
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- JPH10155272A JPH10155272A JP30896896A JP30896896A JPH10155272A JP H10155272 A JPH10155272 A JP H10155272A JP 30896896 A JP30896896 A JP 30896896A JP 30896896 A JP30896896 A JP 30896896A JP H10155272 A JPH10155272 A JP H10155272A
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- voltage
- power
- power failure
- failure state
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は交流電源、特に商用
交流電源を入力源とし、高力率で直流電圧を供給する電
源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 power supply device which uses an AC power supply, particularly a commercial AC power supply as an input source, and supplies a DC voltage at a high power factor.
【０００２】[0002]
【従来の技術】図５は力率改善回路を備えた電源装置の
一例を示す回路図である。図５において、１は交流電
源、２は整流回路、３はチョークコイル４、スイッチン
グ手段１１及び整流素子６より構成される力率改善回
路。７は平滑回路、２１は力率改善回路制御手段であ
る。2. Description of the Related Art FIG. 5 is a circuit diagram showing an example of a power supply device provided with a power factor improving circuit. In FIG. 5, 1 is an AC power supply, 2 is a rectifying circuit, 3 is a power factor improving circuit composed of a choke coil 4, switching means 11 and rectifying element 6. 7 is a smoothing circuit, 21 is a power factor improvement circuit control means.
【０００３】整流回路２は交流電源１より正弦波交流電
圧を受け脈流整流電圧を出力する。力率改善回路３及び
力率改善回路制御手段２１はこの脈流整流電圧を受け、
入力電流波形が正弦波状になるようにスイッチング手段
１１のＯＮ／ＯＦＦを行う。平滑回路７は力率改善回路
３の出力電圧を平滑して負荷に電力を供給する。A rectifier circuit 2 receives a sine wave AC voltage from an AC power supply 1 and outputs a pulsating rectified voltage. The power factor improvement circuit 3 and the power factor improvement circuit control means 21 receive this pulsating rectified voltage,
The switching means 11 is turned on / off so that the input current waveform becomes a sine wave. The smoothing circuit 7 smoothes the output voltage of the power factor improvement circuit 3 and supplies power to the load.
【０００４】上記のように構成された電源装置におい
て、電源投入時は交流電源１、整流回路２、チョークコ
イル４、整流素子６、平滑回路７、整流回路２、交流電
源１の経路を通り平滑回路７を充電する電流が流れる。
この時、平滑回路７に電荷が蓄えられていない状態では
一般に突入電流と呼ばれる瞬間的に大きな電流が流れ
る。この突入電流が整流回路２等に大きなストレスを与
え、寿命を短くしたり、時には破損に至ることがある。
このためこの突入電流を抑えるための種々様々な手段が
講じられている。In the power supply device configured as described above, when the power is turned on, the AC power supply 1, the rectifier circuit 2, the choke coil 4, the rectifying element 6, the smoothing circuit 7, the rectifier circuit 2, and the AC power supply 1 pass through a smooth path. A current for charging the circuit 7 flows.
At this time, when no charge is stored in the smoothing circuit 7, a large instantaneous current generally called an inrush current flows. This inrush current gives a large stress to the rectifier circuit 2 and the like, shortening the service life and sometimes leading to breakage.
For this reason, various means for suppressing this inrush current have been taken.
【０００５】従来のこの種の技術としては、特開平８−
１２６３３１号公報に記載されているものがある。以下
図面を用いて説明する。A conventional technique of this kind is disclosed in Japanese Unexamined Patent Publication No.
There is one described in Japanese Patent No. 126331. This will be described below with reference to the drawings.
【０００６】図６は電源投入時の突入電流を抑制する手
段を設けた電源装置の一例を示した回路図である。図６
において９は突入電流を抑制する目的の限流抵抗、１０
は限流抵抗９を短絡するための第２のスイッチング手
段、２２は平滑回路７の直流電圧値を検出する直流電圧
検出手段、２３は第２のスイッチング手段の導通・非導
通状態を切り換えるスイッチ切換制御手段である。その
他、図５と同一の符号が付されたものは図５で説明して
いるのでここでの詳細な説明は省略する。FIG. 6 is a circuit diagram showing an example of a power supply device provided with a means for suppressing an inrush current when the power is turned on. FIG.
9 is a current limiting resistance for suppressing the inrush current, 10
Is a second switching means for short-circuiting the current limiting resistor 9, 22 is a DC voltage detecting means for detecting a DC voltage value of the smoothing circuit 7, and 23 is a switch switching for switching a conductive / non-conductive state of the second switching means. Control means. In addition, since the components denoted by the same reference numerals as those in FIG. 5 are described in FIG. 5, detailed description thereof will be omitted.
【０００７】上記のように構成された電源装置におい
て、電源投入時、第２のスイッチング手段１０は非導通
状態であり、電流は限流抵抗９を介して流れる。そのた
め電源投入時に流れる突入電流は限流抵抗９により抑制
され、その結果整流回路２等にかかるストレスを緩和す
ることができる。そして力率改善回路３が動作し、平滑
回路７が充電される。この直流電圧値を直流電圧検出手
段２２が検出し、この値が設定値に達するとスイッチ切
換手段２３は第２のスイッチング手段１０を導通状態に
切り換える。これにより限流抵抗９による電力消費を抑
えることができる。従って、図６の構成により電力損失
を抑え、回路の寿命及び信頼性を向上させることができ
る。In the power supply device configured as described above, when the power is turned on, the second switching means 10 is in a non-conductive state, and the current flows through the current limiting resistor 9. Therefore, the inrush current flowing when the power is turned on is suppressed by the current limiting resistor 9, and as a result, the stress applied to the rectifier circuit 2 and the like can be reduced. Then, the power factor improving circuit 3 operates and the smoothing circuit 7 is charged. This DC voltage value is detected by the DC voltage detecting means 22, and when this value reaches a set value, the switch switching means 23 switches the second switching means 10 to the conductive state. Thereby, power consumption by the current limiting resistor 9 can be suppressed. Therefore, the configuration shown in FIG. 6 can suppress power loss and improve the life and reliability of the circuit.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら、上記従
来の構成では、瞬時停電等、一旦電源の供給が無くなり
復旧後再び電源が供給されるような外乱が生じた場合、
停電時でも平滑回路７の直流電圧が依然設定値以上であ
れば第２のスイッチング手段１０が導通状態であり、こ
の後電源供給が復旧する際に第１のスイッチング手段５
が導通状態であれば、交流電源１、整流回路２、チョー
クコイル４、第１のスイッチング手段５、第２のスイッ
チング手段１０、整流回路２、交流電源１という経路で
突入電流が流れ整流回路や第１のスイッチング手段にス
トレスを与えるという課題を有していた。However, in the above-mentioned conventional configuration, when a disturbance such as an instantaneous power failure occurs, the power supply is stopped once and the power is supplied again after the recovery.
If the DC voltage of the smoothing circuit 7 is still equal to or higher than the set value even during a power failure, the second switching means 10 is in a conductive state.
Is in a conductive state, an inrush current flows through a path of the AC power supply 1, the rectifier circuit 2, the choke coil 4, the first switching means 5, the second switching means 10, the rectifier circuit 2, and the AC power supply 1, and the rectifier circuit There was a problem that stress was applied to the first switching means.
【０００９】本発明はこのような従来の課題を解決する
ものであり、電源投入時だけでなく瞬時停電等の外乱が
生じた場合でも回路構成部品にストレスを与えることな
く信頼性の高い電源装置を提供することを目的とする。SUMMARY OF THE INVENTION The present invention is to solve such a conventional problem, and provides a highly reliable power supply device without applying stress to circuit components not only when power is turned on but also when a disturbance such as an instantaneous power failure occurs. The purpose is to provide.
【００１０】[0010]
【課題を解決するための手段】上記課題を解決するため
に本発明は、入力交流電圧の停電状態を検出するととも
に停電状態であれば停電状態確認信号を出力する停電状
態検出手段を設けるものである。According to the present invention, there is provided a power failure state detecting means for detecting a power failure state of an input AC voltage and outputting a power failure state confirmation signal if the power failure state is present. is there.
【００１１】上記停電状態検出手段によって、停電状態
を検出することができ停電状態確認信号により第２のス
イッチング手段を非導通状態に切り換え、復旧時の突入
電流を抑制することができ、より信頼性の高い電源装置
が得られる。The power failure state detecting means can detect the power failure state, switch the second switching means to the non-conductive state by the power failure state confirmation signal, and suppress the rush current at the time of restoration, thereby improving reliability. Power supply device with high power.
【００１２】[0012]
【発明の実施の形態】請求項１に記載の発明は、入力交
流電圧を受電し整流電圧を出力する整流回路と、整流電
圧を受電するチョークコイルと第１のスイッチング手段
と整流素子から構成される力率改善回路と、力率改善回
路の出力電圧を平滑して負荷に供給する平滑回路と、回
路に流れる電流を制限する限流抵抗とこの限流抵抗を短
絡する第２のスイッチング手段との並列回路から構成さ
れる突入電流防止回路と、入力交流電流の波形が正弦波
状になるように力率改善回路の第１のスイッチング手段
のＯＮ／ＯＦＦ制御を行う力率改善回路制御手段と、平
滑回路の直流電圧値を検出するとともにこの検出値が所
定の設定値以上であれば直流電圧確認信号を出力する直
流電圧検出手段と、入力交流電圧の停電状態を検出する
とともに停電状態であれば停電状態確認信号を出力する
停電状態検出手段と、入力交流電圧受電後、直流電圧検
出手段からの直流電圧確認信号を受け突入電流防止回路
の第２のスイッチング手段を導通状態にするとともに、
停電状態検出手段からの停電状態確認信号を受け突入電
流防止回路の第２のスイッチング手段を非導通状態に切
り換えるスイッチ切換制御手段を設けるものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 comprises a rectifier circuit for receiving an input AC voltage and outputting a rectified voltage, a choke coil for receiving the rectified voltage, first switching means, and a rectifier. A power factor improving circuit, a smoothing circuit for smoothing an output voltage of the power factor improving circuit and supplying the output voltage to a load, a current limiting resistor for limiting a current flowing through the circuit, and a second switching means for short-circuiting the current limiting resistor. An inrush current prevention circuit configured by a parallel circuit of: a power factor improvement circuit control unit that performs ON / OFF control of a first switching unit of the power factor improvement circuit so that a waveform of an input AC current has a sine wave shape; DC voltage detecting means for detecting a DC voltage value of the smoothing circuit and outputting a DC voltage confirmation signal if the detected value is equal to or more than a predetermined set value; detecting a power failure state of the input AC voltage; A power failure detecting means which outputs a power failure state confirmation signal if, after input AC voltage power receiving, while the conductive state of the second switching means of the rush current prevention circuit receives DC voltage confirmation signal from the DC voltage detecting means,
A switch switching control means for receiving a power failure state confirmation signal from the power failure state detection means and switching the second switching means of the inrush current prevention circuit to a non-conductive state is provided.
【００１３】また請求項２に記載の発明は、入力交流電
圧を受電し整流電圧を出力する整流回路と、整流電圧を
受電するチョークコイルと第１のスイッチング手段と整
流素子から構成される力率改善回路と、力率改善回路の
出力電圧を平滑して負荷に供給する平滑回路と、回路に
流れる電流を制限する限流抵抗とこの限流抵抗を短絡す
る第２のスイッチング手段との並列回路から構成される
突入電流防止回路と、平滑回路の直流電圧値を検出する
とともにこの検出値が所定の設定値以上であれば直流電
圧確認信号を出力する直流電圧検出手段と、入力交流電
圧の停電状態を検出するとともに停電状態であれば停電
状態確認信号を出力する停電状態検出手段と、入力交流
電流の波形が正弦波状になるように力率改善回路の第１
のスイッチング手段のＯＮ／ＯＦＦ制御を行うとともに
停電状態検出手段からの停電状態確認信号を受け力率改
善回路の第１のスイッチング手段をＯＦＦする力率改善
回路制御手段と、入力交流電圧受電後、直流電圧検出手
段からの直流電圧確認信号を受け突入電流防止回路の第
２のスイッチング手段を導通状態にするスイッチ切換制
御手段を設けるものである。According to a second aspect of the present invention, there is provided a rectifier circuit for receiving an input AC voltage and outputting a rectified voltage, a choke coil for receiving the rectified voltage, a first switching means, and a rectifying element. A parallel circuit including an improvement circuit, a smoothing circuit for smoothing an output voltage of the power factor improvement circuit and supplying the load to a load, a current limiting resistor for limiting a current flowing through the circuit, and a second switching means for short-circuiting the current limiting resistor. An inrush current prevention circuit comprising: a DC voltage detection means for detecting a DC voltage value of a smoothing circuit and outputting a DC voltage confirmation signal if the detected value is equal to or greater than a predetermined set value; A power failure state detecting means for detecting a power failure state and outputting a power failure state confirmation signal if the power failure occurs, and a first power factor improving circuit for providing a sinusoidal waveform of the input alternating current.
Power-factor improvement circuit control means for performing ON / OFF control of the switching means, receiving the power failure state confirmation signal from the power failure state detection means, and turning off the first switching means of the power factor improvement circuit; A switch switching control means is provided which receives a DC voltage confirmation signal from the DC voltage detection means and makes the second switching means of the inrush current prevention circuit conductive.
【００１４】そしてこれらの構成によれば入力交流電圧
の停電状態を検出し、第１のスイッチング手段を非導通
状態にし、電源の復旧時に流れる突入電流による整流回
路や第１及び第２のスイッチング手段にかかるストレス
を抑えることができる。According to these configurations, a power failure state of the input AC voltage is detected, the first switching means is turned off, and a rectifier circuit and a first and second switching means by an inrush current flowing when the power is restored. Can be reduced.
【００１５】請求項３に記載の発明は、突入電流防止回
路及び停電状態検出手段を整流回路と力率改善回路との
間に設けるものである。According to a third aspect of the present invention, the inrush current prevention circuit and the power failure state detecting means are provided between the rectifier circuit and the power factor correction circuit.
【００１６】そしてこの構成によれば入力交流電圧の停
電状態を検出し、第１或いは第２のスイッチング手段を
非導通状態にし、電源の復旧時に流れる突入電流による
整流回路や第１及び第２のスイッチング手段にかかるス
トレスを抑えるとともに、力率改善回路制御手段、直流
電圧検出手段、スイッチ切換制御手段及び停電状態検出
手段を電気的に絶縁することなくグランドを共通して構
成することができる。According to this configuration, a power failure state of the input AC voltage is detected, the first or second switching means is turned off, and a rectifier circuit or a first and a second circuit based on an inrush current flowing when the power is restored. The stress applied to the switching means can be suppressed, and the power factor improvement circuit control means, the DC voltage detection means, the switch switching control means, and the power failure state detection means can be configured with a common ground without being electrically insulated.
【００１７】[0017]
【実施例】以下本発明の実施例について図面を参照して
説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００１８】（実施例１）図１において、１は交流電
源、２は整流回路、３はチョークコイル４、第１のスイ
ッチング手段５及び整流素子６により構成される力率改
善回路、７は平滑回路、８は限流抵抗９及び第２のスイ
ッチング手段１０より構成される突入電流防止回路、２
１は力率改善回路制御手段、２２は直流電圧検出手段、
２３はスイッチ切換制御手段、２４は停電状態検出手段
である。(Embodiment 1) In FIG. 1, 1 is an AC power supply, 2 is a rectifying circuit, 3 is a power factor improving circuit composed of a choke coil 4, first switching means 5 and a rectifying element 6, and 7 is a smoothing circuit. A rush current prevention circuit 8 comprising a current limiting resistor 9 and a second switching means 10;
1 is a power factor improvement circuit control means, 22 is a DC voltage detection means,
23 is a switch changeover control means, and 24 is a power failure state detection means.
【００１９】以上のように構成された電源装置について
説明する。整流回路２は交流電源１より正弦波交流電圧
を受け脈流整流電圧を出力する。力率改善回路３及び力
率改善回路制御手段２１はこの脈流整流電圧を受け、入
力電流波形が正弦波状になるようにスイッチング素子５
のＯＮ／ＯＦＦを行う。平滑回路７は力率改善回路３の
出力電圧を平滑して負荷に電力を供給する。A power supply device configured as described above will be described. The rectifier circuit 2 receives a sine wave AC voltage from the AC power supply 1 and outputs a pulsating rectified voltage. The power factor improving circuit 3 and the power factor improving circuit control means 21 receive the pulsating rectified voltage and switch the switching element 5 so that the input current waveform becomes a sine wave.
Is turned ON / OFF. The smoothing circuit 7 smoothes the output voltage of the power factor improvement circuit 3 and supplies power to the load.
【００２０】また電源投入時、平滑回路７に電荷が蓄え
られていない状態では直流電圧値が設定値以下であるた
め第２のスイッチング手段１０は非導通状態であり、突
入電流は限流抵抗９により抑制される。平滑回路７が充
電され直流電圧検出手段２２により検出される直流電圧
値が所定の値に達すると、直流電圧検出手段２２から直
流電圧確認信号が出力される。スイッチ切換制御手段２
３はこの直流電圧確認信号を受け突入電流防止回路８の
第２のスイッチング手段１０を導通状態に切り換える。
これにより、電流は限流抵抗９を流れず第２のスイッチ
ング手段１０を流れるので限流抵抗９による電力損失を
低減することができる。When the power is turned on, the DC voltage value is equal to or less than the set value in a state where no charge is stored in the smoothing circuit 7, so that the second switching means 10 is non-conductive, and the rush current is reduced by the current limiting resistor 9 Is suppressed. When the smoothing circuit 7 is charged and the DC voltage value detected by the DC voltage detecting means 22 reaches a predetermined value, the DC voltage detecting means 22 outputs a DC voltage confirmation signal. Switch switching control means 2
3 receives the DC voltage confirmation signal and switches the second switching means 10 of the inrush current prevention circuit 8 to the conductive state.
As a result, the current flows through the second switching means 10 without flowing through the current limiting resistor 9, so that the power loss due to the current limiting resistor 9 can be reduced.
【００２１】この電源装置において、瞬時停電等の一時
的に交流電源１からの電源供給が無くなるような外乱が
発生した場合について説明する。停電状態が発生すると
停電状態検出手段２４は停電状態を検出し、停電状態確
認信号を出力する。スイッチ切換手段２３ではこの停電
状態確認信号を受けると、直流電圧検出手段２２から出
力される直流電圧確認信号よりも優先的に処理し、突入
電流防止回路８の第２のスイッチング手段１０を非導通
状態に切り換える。A case will be described in which a disturbance such as an instantaneous power outage or the like in which the power supply from the AC power supply 1 is temporarily stopped occurs in this power supply device. When a power failure state occurs, the power failure state detecting means 24 detects the power failure state and outputs a power failure state confirmation signal. Upon receiving the power failure state confirmation signal, the switch switching means 23 processes the DC voltage confirmation signal output from the DC voltage detection means 22 with priority, and turns off the second switching means 10 of the inrush current prevention circuit 8. Switch to state.
【００２２】そして電源供給が復旧し第１のスイッチン
グ手段５が導通状態にあるときも電流は交流電源１、整
流回路２、チョークコイル４、第１のスイッチング手段
５、限流抵抗９、整流回路２、交流電源１を介して流れ
る。このため突入電流は限流抵抗９により抑制され、整
流回路２、第１のスイッチング手段５及び第２のスイッ
チング手段１０に与えるストレスを抑えることができ
る。Also, when the power supply is restored and the first switching means 5 is in a conductive state, the current still flows through the AC power supply 1, rectifier circuit 2, choke coil 4, first switching means 5, current limiting resistor 9, rectifier circuit. 2. Flow through the AC power supply 1. Therefore, the rush current is suppressed by the current limiting resistor 9, and the stress applied to the rectifier circuit 2, the first switching means 5, and the second switching means 10 can be suppressed.
【００２３】この結果、電力損失を少なく抑えることが
でき尚且つ電源投入時の突入電流だけでなく瞬時停電等
の外乱に対しても信頼性の高い電源装置を実現すること
ができる。As a result, it is possible to realize a power supply device that can suppress the power loss and that is highly reliable not only for an inrush current when the power is turned on but also for a disturbance such as an instantaneous power failure.
【００２４】（実施例２）図２を用いて説明する。尚、
以下の説明において、実施例１と同一符号のものは同様
の動作を行うものであるのでその詳細な説明は省略す
る。(Embodiment 2) A description will be given with reference to FIG. still,
In the following description, components having the same reference numerals as those in the first embodiment perform the same operation, and thus detailed description thereof will be omitted.
【００２５】図２のように構成された電源装置について
説明する。整流回路２は交流電源１より正弦波交流電圧
を受け脈流整流電圧を出力する。力率改善回路３及び力
率改善回路制御手段２１はこの脈流整流電圧を受け、入
力電流波形が正弦波状になるようにスイッチング素子５
のＯＮ／ＯＦＦを行う。平滑回路７は力率改善回路３の
出力電圧を平滑して負荷に電力を供給する。A power supply device configured as shown in FIG. 2 will be described. The rectifier circuit 2 receives a sine wave AC voltage from the AC power supply 1 and outputs a pulsating rectified voltage. The power factor improving circuit 3 and the power factor improving circuit control means 21 receive the pulsating rectified voltage and switch the switching element 5 so that the input current waveform becomes a sine wave.
Is turned ON / OFF. The smoothing circuit 7 smoothes the output voltage of the power factor improvement circuit 3 and supplies power to the load.
【００２６】また電源投入時、平滑回路７に電荷が蓄え
られていない状態では直流電圧値が設定値以下であるた
め第２のスイッチング手段１０は非導通状態であり、突
入電流は限流抵抗９により抑制される。平滑回路７が充
電され直流電圧検出手段２２により検出される直流電圧
値が所定の値に達すると、直流電圧検出手段２２から直
流電圧確認信号が出力される。スイッチ切換制御手段２
３はこの直流電圧確認信号を受け突入電流防止回路８の
第２のスイッチング手段１０を導通状態に切り換える。
これにより、電流は限流抵抗９を流れず第２のスイッチ
ング手段１０を流れるので限流抵抗９による電力損失を
低減することができる。When the power is turned on, the DC voltage value is equal to or less than the set value when the electric charge is not stored in the smoothing circuit 7, so that the second switching means 10 is in a non-conductive state. Is suppressed. When the smoothing circuit 7 is charged and the DC voltage value detected by the DC voltage detecting means 22 reaches a predetermined value, the DC voltage detecting means 22 outputs a DC voltage confirmation signal. Switch switching control means 2
3 receives the DC voltage confirmation signal and switches the second switching means 10 of the inrush current prevention circuit 8 to the conductive state.
As a result, the current flows through the second switching means 10 without flowing through the current limiting resistor 9, so that the power loss due to the current limiting resistor 9 can be reduced.
【００２７】この電源装置において、瞬時停電等の一時
的に交流電源１からの電源供給が無くなるような外乱が
発生した場合について説明する。停電状態が発生すると
停電状態検出手段２４は停電状態を検出し、停電状態確
認信号を出力する。力率改善回路制御手段２１ではこの
停電状態確認信号を受けると、直流電圧検出手段２２か
ら出力される直流電圧確認信号よりも優先的に処理し、
力率改善回路３の第１のスイッチング手段５を非導通状
態に切り換える。A case will be described in which a disturbance such as a momentary power failure occurs in which the power supply from the AC power supply 1 is temporarily stopped. When a power failure state occurs, the power failure state detecting means 24 detects the power failure state and outputs a power failure state confirmation signal. When the power factor improvement circuit control means 21 receives this power failure state confirmation signal, it processes the DC power confirmation signal output from the DC voltage detection means 22 in preference to the DC voltage confirmation signal.
The first switching means 5 of the power factor correction circuit 3 is switched to a non-conductive state.
【００２８】そして電源供給が復旧し、第２のスイッチ
ング手段１０が導通状態にあるときは平滑回路７に設定
値以上の電荷が蓄えられているため大きな突入電流は流
れない。また、平滑回路７の直流電圧値が設定値以下の
場合は第２のスイッチング手段１０が非導通状態にある
ため、突入電流は流れるが限流抵抗９により抑制され
る。したがって整流回路２、第１のスイッチング手段５
及び第２のスイッチング手段１０にかかるストレスを抑
えることができる。Then, when the power supply is restored and the second switching means 10 is in the conductive state, a large inrush current does not flow because the smoothing circuit 7 stores a charge more than the set value. When the DC voltage value of the smoothing circuit 7 is equal to or less than the set value, the second switching means 10 is in a non-conductive state, so that an inrush current flows but is suppressed by the current limiting resistor 9. Therefore, the rectifier circuit 2 and the first switching means 5
In addition, stress applied to the second switching means 10 can be suppressed.
【００２９】この結果、実施例１の場合と同様に電力損
失を少なく抑えることができ尚且つ電源投入時の突入電
流だけでなく瞬時停電等の外乱に対しても信頼性の高い
電源装置を実現することができる。As a result, as in the case of the first embodiment, a power supply which can suppress the power loss to a small degree and has a high reliability not only in the inrush current at the time of turning on the power but also against disturbance such as an instantaneous power failure is realized. can do.
【００３０】また実施例１及び実施例２では突入電流防
止回路８は整流回路２及び力率改善回路３の間に設置さ
れているが、突入電流防止回路８が交流電源１と整流回
路２の間にあっても同等の効果を得ることができる。In the first and second embodiments, the inrush current prevention circuit 8 is provided between the rectifier circuit 2 and the power factor correction circuit 3, but the inrush current prevention circuit 8 is provided between the AC power supply 1 and the rectifier circuit 2. Even in the middle, the same effect can be obtained.
【００３１】（実施例３）図３及び図４を用いて説明す
る。尚、以下の説明において、実施例１と同一符号のも
のは同様の動作を行うものであるのでその詳細な説明は
省略する。図３及び図４ではそれぞれ図１、図２の回路
構成から突入電流防止回路８及び停電状態検出手段２４
を整流回路と力率改善回路３との間に設けている。(Embodiment 3) A description will be given with reference to FIGS. In the following description, components having the same reference numerals as those in the first embodiment perform the same operations, and thus detailed description thereof will be omitted. In FIGS. 3 and 4, the inrush current prevention circuit 8 and the power failure state detection means 24 are added to the circuit configurations of FIGS.
Is provided between the rectifier circuit and the power factor correction circuit 3.
【００３２】図３及び図４のように構成された電源装置
について説明する。力率改善動作、交流電源１の電源供
給時における突入電流抑制動作、また瞬時停電等の外乱
が発生し、電源供給が復旧した場合における突入電流抑
制動作は実施例１及び実施例２と同様の動作を行うので
その詳細な説明は省略する。A power supply device configured as shown in FIGS. 3 and 4 will be described. The power factor improving operation, the rush current suppressing operation when the AC power supply 1 supplies power, and the rush current suppressing operation when the power supply is restored after disturbance such as an instantaneous power failure occurs are the same as those in the first and second embodiments. Since the operation is performed, a detailed description thereof will be omitted.
【００３３】図３及び図４の回路構成では力率改善回路
制御手段２１、直流電圧検出手段２２、スイッチ切換制
御手段２３及び停電状態検出手段２４それぞれの回路を
構成する際の電気的なグランドレベルが全て同一であ
る。そのため、装置の交流側と直流側とを電気的に絶縁
する絶縁トランスやホトアイソレータといった絶縁部品
を用いる必要なく回路を構成することができる。In the circuit configurations shown in FIGS. 3 and 4, the electrical ground level when configuring the power factor improvement circuit control means 21, the DC voltage detection means 22, the switch switching control means 23, and the power failure state detection means 24, respectively. Are all the same. Therefore, a circuit can be configured without using an insulating component such as an insulating transformer or a photo isolator for electrically insulating the AC side and the DC side of the device.
【００３４】この結果、実施例１及び実施例２の場合と
同様に電力損失を少なく抑えることができ尚且つ電源投
入時の突入電流だけでなく瞬時停電等の外乱に対しても
信頼性の高い電源装置を構成することができ、さらに回
路構成を簡素化することができ、装置の小型・低コスト
化を実現することができる。As a result, the power loss can be reduced as in the case of the first and second embodiments, and the reliability is high not only for the inrush current at the time of turning on the power but also for disturbance such as an instantaneous power failure. The power supply device can be configured, the circuit configuration can be simplified, and the device can be reduced in size and cost.
【００３５】尚、実施例１、実施例２及び実施例３にお
いて第１のスイッチング手段５及び第２のスイッチング
手段１０に用いるスイッチング素子としては自己消弧機
能を有するＧＴＯ、パワートランジスタ、ＭＯＳＦＥ
Ｔ、ＩＧＢＴなどが好ましい。整流素子６としては高速
逆回復特性を有するダイオードが、平滑回路７としては
大容量のコンデンサが一般に用いられる。In the first, second and third embodiments, the switching elements used for the first switching means 5 and the second switching means 10 are a GTO having a self-extinguishing function, a power transistor, and a MOSFE.
T and IGBT are preferred. A diode having a high-speed reverse recovery characteristic is generally used as the rectifying element 6, and a large-capacity capacitor is generally used as the smoothing circuit 7.
【００３６】[0036]
【発明の効果】上記実施例から明らかなように、請求項
１に記載の発明は、整流回路と、チョークコイルと第１
のスイッチング手段と整流素子から構成される力率改善
回路と、平滑回路と、突入電流防止回路と、入力電流波
形が正弦波状になるように力率改善回路の第１のスイッ
チング手段の制御を行う力率改善回路制御手段と、検出
した平滑回路の直流電圧値が所定の設定値以上であれば
直流電圧確認信号を出力する直流電圧検出手段と、入力
交流電圧の停電状態を検出するとともに停電状態であれ
ば停電状態確認信号を出力する停電状態検出手段と、入
力交流電圧受電後、直流電圧確認信号を受け突入電流防
止回路の第２のスイッチング手段を導通状態にするとと
もに、停電状態確認信号を受け突入電流防止回路の第２
のスイッチング手段を非導通状態に切り換えるスイッチ
切換制御手段を設けるものである。As is apparent from the above embodiment, the first aspect of the present invention provides a rectifier circuit, a choke coil and a first
, A power factor improvement circuit comprising a rectifying element, a smoothing circuit, an inrush current prevention circuit, and a first switching means of the power factor improvement circuit so that the input current waveform becomes sinusoidal. Power factor improving circuit control means, DC voltage detecting means for outputting a DC voltage confirmation signal if the detected DC voltage value of the smoothing circuit is equal to or more than a predetermined set value, and detecting a power failure state of the input AC voltage and a power failure state If it is, a power failure state detection means for outputting a power failure state confirmation signal, and after receiving the input AC voltage, receiving the DC voltage confirmation signal, turning on the second switching means of the inrush current prevention circuit, and outputting the power failure state confirmation signal The second of the receiving rush current prevention circuit
Switch switching control means for switching the switching means to a non-conductive state.
【００３７】また請求項２に記載の発明は、整流回路
と、チョークコイルと第１のスイッチング手段と整流素
子から構成される力率改善回路と、平滑回路と、突入電
流防止回路と、検出した平滑回路の直流電圧値が所定の
設定値以上であれば直流電圧確認信号を出力する直流電
圧検出手段と、入力交流電圧の停電状態を検出するとと
もに停電状態であれば停電状態確認信号を出力する停電
状態検出手段と、入力電流波形が正弦波状になるように
力率改善回路の第１のスイッチング手段の制御を行うと
ともに停電状態確認信号を受け力率改善回路の第１のス
イッチング手段をＯＦＦする力率改善回路制御手段と、
入力交流電圧受電後、直流電圧確認信号を受け突入電流
防止回路の第２のスイッチング手段を導通状態にするス
イッチ切換制御手段を設けるものである。According to the second aspect of the present invention, a rectifying circuit, a power factor improving circuit including a choke coil, a first switching means, and a rectifying element, a smoothing circuit, and an inrush current preventing circuit are detected. DC voltage detecting means for outputting a DC voltage confirmation signal if the DC voltage value of the smoothing circuit is equal to or higher than a predetermined set value; and detecting a power failure state of the input AC voltage and outputting a power failure state confirmation signal if the power failure state is present. The power failure state detection means and the first switching means of the power factor correction circuit are controlled so that the input current waveform becomes a sine wave, and the first switching means of the power factor improvement circuit is turned off in response to the power failure state confirmation signal. Power factor improvement circuit control means,
After the input AC voltage is received, a switch switching control means is provided which receives the DC voltage confirmation signal and makes the second switching means of the inrush current prevention circuit conductive.
【００３８】そしてこれらの構成によれば瞬時停電時等
の入力交流電圧の停電状態を検出した時、第１のスイッ
チング手段を非導通状態に切り換えることにより、入力
交流電圧の復旧時に流れる突入電流による整流回路や第
１及び第２のスイッチング手段にかかるストレスを抑え
ることができる。この結果、電力損失を少なく抑えるこ
とができ尚且つ瞬時停電等の外乱に対しても信頼性の高
い電源装置を実現することができるという効果を奏す
る。According to these configurations, when a power failure state of the input AC voltage such as an instantaneous power failure is detected, the first switching means is switched to a non-conductive state, so that the inrush current flowing when the input AC voltage is restored is restored. Stress applied to the rectifier circuit and the first and second switching means can be suppressed. As a result, there is an effect that the power loss can be suppressed to a low level, and a power supply device with high reliability can be realized even with disturbance such as an instantaneous power failure.
【００３９】請求項３に記載の発明は、突入電流防止回
路及び停電状態検出手段を整流回路と力率改善回路との
間に設けるものである。According to a third aspect of the present invention, the inrush current prevention circuit and the power failure state detecting means are provided between the rectifier circuit and the power factor correction circuit.
【００４０】そしてこの構成によれば瞬時停電時の入力
交流電圧の停電状態を検出した時、第１或いは第２のス
イッチング手段を非導通状態に切り換えることにより、
入力交流電圧の復旧時に流れる突入電流による整流回路
や第１及び第２のスイッチング手段にかかるストレスを
抑えることができ、さらに力率改善回路制御手段、直流
電圧検出手段、スイッチ切換制御手段及び停電状態検出
手段を電気的に絶縁することなくグランドを共通して構
成することができる。この結果、電力損失を少なく抑え
ることができ尚且つ瞬時停電等の外乱に対しても信頼性
の高い電源装置を実現することができる。同時に回路構
成を簡素化することができ、装置の小型・低コスト化を
実現することができるという効果を奏する。According to this configuration, when a power failure state of the input AC voltage at the time of the momentary power failure is detected, the first or second switching means is switched to a non-conductive state.
Stress applied to the rectifier circuit and the first and second switching means due to the inrush current flowing when the input AC voltage is restored can be suppressed, and the power factor improvement circuit control means, DC voltage detection means, switch switching control means, and power failure state The ground can be commonly configured without electrically insulating the detection means. As a result, it is possible to realize a power supply device that can reduce power loss and that is highly reliable against disturbances such as an instantaneous power failure. At the same time, the circuit configuration can be simplified, and the device can be reduced in size and cost.
【図１】本発明の一実施例を示す電源装置の回路構成図FIG. 1 is a circuit configuration diagram of a power supply device showing one embodiment of the present invention.
【図２】本発明の他の実施例を示す電源装置の回路構成
図FIG. 2 is a circuit configuration diagram of a power supply device showing another embodiment of the present invention.
【図３】本発明の他の実施例を示す電源装置の回路構成
図FIG. 3 is a circuit configuration diagram of a power supply device showing another embodiment of the present invention.
【図４】本発明の他の実施例を示す電源装置の回路構成
図FIG. 4 is a circuit configuration diagram of a power supply device showing another embodiment of the present invention.
【図５】従来例を示す電源装置の回路構成図FIG. 5 is a circuit configuration diagram of a power supply device showing a conventional example.
【図６】従来例を示す電源装置の回路構成図FIG. 6 is a circuit configuration diagram of a power supply device showing a conventional example.
１ 交流電源 ２ 整流回路 ３ 力率改善回路 ４ チョークコイル ５ 第１のスイッチング手段 ６ 整流素子 ７ 平滑回路 ８ 突入電流防止回路 ９ 限流抵抗 １０ 第２のスイッチング手段 １１ スイッチング手段 ２１ 力率改善回路制御手段 ２２ 直流電圧検出手段 ２３ スイッチ切換制御手段 ２４ 停電状態検出手段 DESCRIPTION OF SYMBOLS 1 AC power supply 2 Rectifier circuit 3 Power factor improvement circuit 4 Choke coil 5 First switching means 6 Rectifier 7 Smoothing circuit 8 Inrush current prevention circuit 9 Current limiting resistor 10 Second switching means 11 Switching means 21 Power factor improvement circuit control Means 22 DC voltage detecting means 23 Switch switching control means 24 Power failure state detecting means
Claims (3)
る整流回路と、前記整流電圧を受電するチョークコイル
と第１のスイッチング手段と整流素子から構成される力
率改善回路と、前記力率改善回路の出力電圧を平滑して
負荷に供給する平滑回路と、回路に流れる電流を制限す
る限流抵抗とこの限流抵抗を短絡する第２のスイッチン
グ手段との並列回路から構成される突入電流防止回路
と、前記入力交流電流の波形が正弦波状になるように前
記力率改善回路の第１のスイッチング手段のＯＮ／ＯＦ
Ｆ制御を行う力率改善回路制御手段と、前記平滑回路の
直流電圧値を検出するとともにこの検出値が所定の設定
値以上であれば直流電圧確認信号を出力する直流電圧検
出手段と、前記入力交流電圧の停電状態を検出するとと
もに停電状態であれば停電状態確認信号を出力する停電
状態検出手段と、入力交流電圧受電後、前記直流電圧検
出手段からの直流電圧確認信号を受け前記突入電流防止
回路の第２のスイッチング手段を導通状態にするととも
に、前記停電状態検出手段からの停電状態確認信号を受
け前記突入電流防止回路の第２のスイッチング手段を非
導通状態に切り換えるスイッチ切換制御手段を設ける電
源装置。A rectifier circuit for receiving an input AC voltage and outputting a rectified voltage; a power factor improving circuit including a choke coil for receiving the rectified voltage, first switching means, and a rectifying element; An inrush current comprising a parallel circuit of a smoothing circuit for smoothing the output voltage of the improvement circuit and supplying it to a load, a current limiting resistor for limiting a current flowing in the circuit, and a second switching means for short-circuiting the current limiting resistor; And an ON / OF of a first switching means of the power factor correction circuit so that a waveform of the input AC current has a sine wave shape.
Power factor improvement circuit control means for performing F control; DC voltage detection means for detecting a DC voltage value of the smoothing circuit and outputting a DC voltage confirmation signal if the detected value is equal to or more than a predetermined set value; A power failure state detection means for detecting a power failure state of the AC voltage and outputting a power failure state confirmation signal if the power failure state occurs, and receiving the DC voltage confirmation signal from the DC voltage detection means after receiving the input AC voltage, preventing the inrush current Switch switching control means is provided for turning on the second switching means of the circuit, and for switching the second switching means of the inrush current prevention circuit to a non-conductive state in response to a power failure state confirmation signal from the power failure state detection means. Power supply.
る整流回路と、前記整流電圧を受電するチョークコイル
と第１のスイッチング手段と整流素子から構成される力
率改善回路と、前記力率改善回路の出力電圧を平滑して
負荷に供給する平滑回路と、回路に流れる電流を制限す
る限流抵抗とこの限流抵抗を短絡する第２のスイッチン
グ手段との並列回路から構成される突入電流防止回路
と、前記平滑回路の直流電圧値を検出するとともにこの
検出値が所定の設定値以上であれば直流電圧確認信号を
出力する直流電圧検出手段と、前記入力交流電圧の停電
状態を検出するとともに停電状態であれば停電状態確認
信号を出力する停電状態検出手段と、入力交流電流の波
形が正弦波状になるように前記力率改善回路の第１のス
イッチング手段のＯＮ／ＯＦＦ制御を行うとともに前記
停電状態検出手段からの停電状態確認信号を受け前記力
率改善回路の第１のスイッチング手段をＯＦＦする力率
改善回路制御手段と、入力交流電圧受電後、前記直流電
圧検出手段からの直流電圧確認信号を受け前記突入電流
防止回路の第２のスイッチング手段を導通状態にするス
イッチ切換制御手段を設ける電源装置。2. A rectifier circuit for receiving an input AC voltage and outputting a rectified voltage, a power factor improving circuit comprising a choke coil for receiving the rectified voltage, first switching means, and a rectifying element, An inrush current comprising a parallel circuit of a smoothing circuit for smoothing the output voltage of the improvement circuit and supplying it to a load, a current limiting resistor for limiting a current flowing in the circuit, and a second switching means for short-circuiting the current limiting resistor; A prevention circuit, a DC voltage detecting means for detecting a DC voltage value of the smoothing circuit and outputting a DC voltage confirmation signal if the detected value is equal to or more than a predetermined set value, and detecting a power failure state of the input AC voltage. And a power failure state detection means for outputting a power failure state confirmation signal if the power failure state is present, and turning on a first switching means of the power factor correction circuit so that the waveform of the input AC current becomes a sine wave. Power factor improvement circuit control means for performing power / off control and receiving a power failure state confirmation signal from the power failure state detection means to turn off a first switching means of the power factor improvement circuit; A power supply device provided with a switch switching control unit that receives a DC voltage confirmation signal from a detection unit and makes a second switching unit of the inrush current prevention circuit conductive.
を整流回路と力率改善回路との間に設ける請求項１また
は２記載の電源装置。3. The power supply device according to claim 1, wherein the inrush current prevention circuit and the power failure state detection means are provided between the rectifier circuit and the power factor correction circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30896896A JPH10155272A (en) | 1996-11-20 | 1996-11-20 | Power supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30896896A JPH10155272A (en) | 1996-11-20 | 1996-11-20 | Power supply equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10155272A true JPH10155272A (en) | 1998-06-09 |
Family
ID=17987398
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30896896A Pending JPH10155272A (en) | 1996-11-20 | 1996-11-20 | Power supply equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10155272A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7505291B2 (en) | 2005-09-06 | 2009-03-17 | Acbel Polytech Inc. | AC/DC converter capable of actively restraining an inrush current |
| US9287715B2 (en) | 2012-02-02 | 2016-03-15 | Fujitsu Limited | Power distribution device, power distribution system and method for suppressing inrush current |
| CN107646164A (en) * | 2015-04-17 | 2018-01-30 | 雅达电子国际有限公司 | Effective power factor correction stage used for negative temperature coefficient thermistor during startup controls |
| JP2018029415A (en) * | 2016-08-15 | 2018-02-22 | 株式会社リコー | Power supply device |
| US10205449B2 (en) | 2016-08-31 | 2019-02-12 | Panasonic Intellectual Property Management Co., Ltd. | Switching circuit |
| US10530269B2 (en) | 2017-01-06 | 2020-01-07 | Panasonic Intellectual Property Management Co., Ltd. | AC-DC converter |
| JP2021132492A (en) * | 2020-02-20 | 2021-09-09 | 株式会社リコー | Power source device |
-
1996
- 1996-11-20 JP JP30896896A patent/JPH10155272A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7505291B2 (en) | 2005-09-06 | 2009-03-17 | Acbel Polytech Inc. | AC/DC converter capable of actively restraining an inrush current |
| US9287715B2 (en) | 2012-02-02 | 2016-03-15 | Fujitsu Limited | Power distribution device, power distribution system and method for suppressing inrush current |
| CN107646164A (en) * | 2015-04-17 | 2018-01-30 | 雅达电子国际有限公司 | Effective power factor correction stage used for negative temperature coefficient thermistor during startup controls |
| JP2018029415A (en) * | 2016-08-15 | 2018-02-22 | 株式会社リコー | Power supply device |
| US10205449B2 (en) | 2016-08-31 | 2019-02-12 | Panasonic Intellectual Property Management Co., Ltd. | Switching circuit |
| US10483966B2 (en) | 2016-08-31 | 2019-11-19 | Panasonic Intellectual Property Management Co., Ltd. | Switching circuit |
| US10530269B2 (en) | 2017-01-06 | 2020-01-07 | Panasonic Intellectual Property Management Co., Ltd. | AC-DC converter |
| JP2021132492A (en) * | 2020-02-20 | 2021-09-09 | 株式会社リコー | Power source device |
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