JPH099497A - Power input circuit - Google Patents
Power input circuitInfo
- Publication number
- JPH099497A JPH099497A JP7154888A JP15488895A JPH099497A JP H099497 A JPH099497 A JP H099497A JP 7154888 A JP7154888 A JP 7154888A JP 15488895 A JP15488895 A JP 15488895A JP H099497 A JPH099497 A JP H099497A
- Authority
- JP
- Japan
- Prior art keywords
- relay
- circuit
- inrush current
- power supply
- parallel
- 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.)
- Granted
Links
Landscapes
- Direct Current Feeding And Distribution (AREA)
- Rectifiers (AREA)
- Control Of Voltage And Current In General (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】交流（ＡＣ）電源を入力し、整流
ダイオードと平滑コンデンサにて直流電圧を得る電源の
入力回路において、特に、ＡＣ電源投入時に生じる突入
電流を抑制するための突入電流抑圧回路を有する電源入
力回路に関する。[Industrial application] In an input circuit of a power supply that inputs an alternating current (AC) power supply and obtains a direct current voltage with a rectifying diode and a smoothing capacitor, inrush current suppression for suppressing the inrush current generated when the AC power supply is turned on The present invention relates to a power input circuit having a circuit.
【０００２】[0002]
【従来の技術】従来の電源入力回路では、図５に示す様
にＡＣ電源１と全波整流器１０と平滑コンデンサ１１と
負荷１２を備えた一般的な整流回路において、ＡＣ電源
１用スイッチ２０を投入した時に発生する突入電流を制
限する為の突入電流制限抵抗２と、定常時にこの突入電
流制限抵抗２に電流が流れることにより余計な電力を消
費することを改善する為、突入電流制限抵抗２と並列に
接続したリレー接点３’と負荷側回路の短絡等の事故に
より突入電流制限抵抗の焼損を防ぐ為に電源側に設け
た、リレー接点３’を駆動させる為のリレー３と、リレ
ー３の駆動電圧を得る為の整流用ダイオード４とリレー
３への電流制限抵抗５とリレー３に生じるサージ吸収用
ダイオード６とリレー３用に定電圧を得る為の定電圧ダ
イオード７とリレー３の立上り時間を決定する為の時定
数設定用コンデンサ８にて構成していた。2. Description of the Related Art In a conventional power supply input circuit, a switch 20 for AC power supply 1 is used in a general rectifier circuit including an AC power supply 1, a full-wave rectifier 10, a smoothing capacitor 11 and a load 12 as shown in FIG. The inrush current limiting resistor 2 for limiting the inrush current generated when the power is turned on, and the inrush current limiting resistor 2 for improving the consumption of extra power due to the current flowing through the inrush current limiting resistor 2 in the steady state. The relay 3 and the relay 3 for driving the relay contact 3'provided on the power supply side in order to prevent the rush current limiting resistor from burning due to an accident such as a short circuit between the relay contact 3'connected in parallel with the load side circuit. Rectifying diode 4 for obtaining the driving voltage of the relay 3, current limiting resistor 5 to the relay 3, surge absorbing diode 6 generated in the relay 3, constant voltage diode 7 for obtaining the constant voltage for the relay 3, and relay 3 It was constituted by the time constant setting capacitor 8 for determining the rise time.
【０００３】[0003]
【発明が解決しようとする課題】前述の従来技術によれ
ば、ＡＣ電源１のスチッチ２０を断にした後瞬時にスイ
ッチ２０を再投入しＡＣ電源を入力するような時、リレ
ーの時定数設定用に設けたコンデンサ８の放電回路がな
い為に、リレー接点が閉じた状態でＡＣ電源が入ること
により突入電流が主経路に流れてしまい、主経路の電気
部品の需命劣化等を発生する問題を発生していた。According to the above-mentioned prior art, when the switch 20 of the AC power source 1 is turned off and then the switch 20 is turned on again to input the AC power source, the time constant of the relay is set. Since there is no discharge circuit for the capacitor 8 provided for the purpose, an inrush current flows into the main path due to the AC power being turned on with the relay contact closed, and the demand for electrical components on the main path deteriorates. Had a problem.
【０００４】[0004]
【課題を解決するための手段】本発明の電源入力回路
は、交流電源入力及び全波整流回路と平滑コンデンサと
の間に設けられ、前記交流電源入力の突入電流を制限す
る突入電流制限抵抗と、前記交流電源入力が定常状態の
場合に、前記突入電流制限抵抗をバイパスするリレー接
点と、前記交流電源入力より整流ダイオードと抵抗との
直列回路とをコンデンサ，ツェナーダイオードと前記リ
レーとの並列回路に接続された前記リレー駆動回路とを
有する電源入力回路において、前記並列回路にサーミス
タを並列に取り付けたことを特徴としている。A power supply input circuit according to the present invention is provided between an AC power supply input and a full-wave rectifier circuit and a smoothing capacitor, and an inrush current limiting resistor for limiting an inrush current of the AC power supply input. When the AC power supply input is in a steady state, a relay contact that bypasses the inrush current limiting resistor, a series circuit of a rectifying diode and a resistor from the AC power supply input, a capacitor, a Zener diode and a parallel circuit of the relay. In the power supply input circuit having the relay drive circuit connected to, the thermistor is attached in parallel to the parallel circuit.
【０００５】[0005]
【実施例】以下、図面を参照して本発明の実施例につい
て詳細に説明する。Embodiments of the present invention will now be described in detail with reference to the drawings.
【０００６】図１は、本発明の第１の実施例のブロック
図を示している。FIG. 1 shows a block diagram of a first embodiment of the present invention.
【０００７】本図において、図５の従来の電源入力回路
と同一構成については、同一符号を付してある。図５と
異なるのはサーミスタ９が時定数設定用コンデンサ８と
並列に接続された点にある。In this figure, the same components as those of the conventional power supply input circuit of FIG. 5 are designated by the same reference numerals. The difference from FIG. 5 is that the thermistor 9 is connected in parallel with the time constant setting capacitor 8.
【０００８】図１は、ＡＣ電源１がスイッチ２０を投入
された時に発生する突入電流を制限する為の突入電流制
限抵抗２と、定常時にこの突入電流制限抵抗２に電流が
流れることにより余計な電力を消費することを改善する
為、突入電流制限抵抗２と並列に接続したリレー接点
３’と負荷側回路の短絡等の事故により突入電流制限抵
抗２の焼損を防ぐ為に電源側に設けた、リレー接点３’
を駆動させる為のリレー３と、リレー３の駆動電圧を得
る為の整流用ダイオード４とリレー３への電流制限抵抗
５とリレー３に生じるサージ吸収用ダイオード６とリレ
ー３用に定電圧を得る為の定電圧ダイオード７と、リレ
ー３の立上り時間を決定する為の時定数設定用コンデン
サ８と、リレー３と並列にサーミスタ９を接続した回路
構成からなっている。FIG. 1 shows an inrush current limiting resistor 2 for limiting an inrush current generated when the AC power source 1 turns on the switch 20, and an extra current due to a current flowing through the inrush current limiting resistor 2 in a steady state. In order to improve the consumption of electric power, it was provided on the power supply side to prevent the rush current limiting resistor 2 from burning due to an accident such as a short circuit between the relay contact 3'connected in parallel with the rush current limiting resistor 2 and the load side circuit. , Relay contact 3 '
, A rectifying diode 4 for obtaining the drive voltage of the relay 3, a current limiting resistor 5 for the relay 3, a surge absorbing diode 6 generated in the relay 3, and a constant voltage for the relay 3. A constant voltage diode 7 for this purpose, a time constant setting capacitor 8 for determining the rise time of the relay 3, and a circuit configuration in which a thermistor 9 is connected in parallel with the relay 3.
【０００９】ここで、サーミスタ９は、ＡＣ電源１が一
度断となった後リレー３の立上り時間を決定している時
定数設定用コンデンサ８に充電されている電荷を発熱に
より抵抗値を下げ、瞬時にリレー３が復帰電圧以下にな
るよう放電するように機能している。Here, the thermistor 9 lowers the resistance value by heating the electric charge charged in the time constant setting capacitor 8 which determines the rise time of the relay 3 after the AC power source 1 is once disconnected, The relay 3 instantaneously discharges so that the voltage becomes equal to or lower than the reset voltage.
【００１０】また、定電圧ダイオード７のツェナー電位
は、リレー３を駆動する定格電圧値に選ばれる。The zener potential of the constant voltage diode 7 is selected as the rated voltage value for driving the relay 3.
【００１１】さらに、本発明の動作をさらに詳細に図を
用いて説明する。The operation of the present invention will be described in more detail with reference to the drawings.
【００１２】図２は、図１の突入電流制限回路に関する
部分の機能ブロック図である。ＡＣ電源１を投入後、リ
レー３の立上り時間を決定する時定数設定用のコンデン
サ８に充電される。次に、電源を断とした時、サーミス
タ９の抵抗値が発熱によって、並列に接続されているリ
レー３の内部抵抗３”よりも低い値となると、コンデン
サ８に充電されている電荷を急速に放電する。FIG. 2 is a functional block diagram of a portion related to the inrush current limiting circuit of FIG. After the AC power supply 1 is turned on, the capacitor 8 for setting the time constant that determines the rise time of the relay 3 is charged. Next, when the resistance value of the thermistor 9 becomes lower than the internal resistance 3 ″ of the relay 3 connected in parallel due to heat generation when the power is turned off, the electric charge charged in the capacitor 8 is rapidly increased. To discharge.
【００１３】図３は、図２に示す電位ＶR 、の時間的変
化を示す図である。FIG. 3 is a diagram showing the change over time of the potential V R shown in FIG.
【００１４】本図において、縦軸はＶR 、すなわち、リ
レー３に加えられる電圧を表し、横軸は経過時間を表
す。また、Ａはリレー３の両端にかかる定格電圧、Ｂは
リレーの復帰電圧、Ｃはサーミスタ９がなかった場合の
リレー３の電位が定格電圧から復帰電圧に達するまでの
時間、Ｃ’は本発明におけるリレー３の電位が定格電圧
から復帰電圧に達するまでの時間を表す。In the figure, the vertical axis represents V R , that is, the voltage applied to the relay 3, and the horizontal axis represents the elapsed time. Also, A is the rated voltage applied to both ends of the relay 3, B is the return voltage of the relay, C is the time until the potential of the relay 3 reaches the return voltage from the rated voltage in the absence of the thermistor 9, and C ′ is the present invention. Represents the time required for the potential of the relay 3 to reach the reset voltage from the rated voltage.
【００１５】図４は、ＡＣ電源１を一定周期で短時間に
オン，オフしてリレー３の電位ＶRを図１に示す場合と
図５に示す場合とについて示したものである。FIG. 4 shows the case where the AC power supply 1 is turned on and off in a short period of time at a constant cycle to show the potential V R of the relay 3 in FIG. 1 and in FIG.
【００１６】図５におけるＶR はＡＣ電源１がオンから
オフになってもコンデンサ８に充電された電圧が放電す
るため長時間要するため、リレー後復帰電圧に達する前
に次のＡＣ電源１の投入がなされている。このため、リ
レー３は常にオン状態となったままになっている。Since V R in FIG. 5 takes a long time because the voltage charged in the capacitor 8 is discharged even when the AC power supply 1 is turned off from on, it takes a long time to reach the next reset voltage after the relay. The input has been made. Therefore, the relay 3 is always in the ON state.
【００１７】一方、図１におけるＶR は、ＡＣ電源がサ
ーミスタ９の抵抗により放電されリレー復帰電圧以下に
なるため、確実にリレー３がオン，オフしている。On the other hand, since V R in FIG. 1 is equal to or lower than the relay recovery voltage because the AC power source is discharged by the resistance of the thermistor 9, the relay 3 is reliably turned on and off.
【００１８】以上説明した実施例では、サーミスタ９を
用いてコンデンサ８の充電電圧を放電したがこの結果、
サーミスタ９が発熱により抵抗値が低くなることによ
り、リレー３の電位が定格電圧から復帰電圧に達するま
での時間が短縮化され、従来技術よりも早くリレーの復
帰電圧以下となるので、電源再投入時においてもリレー
接点３’が開放している為、確実に突入電流を突入電流
制限抵抗に流すことができる。In the embodiment described above, the thermistor 9 was used to discharge the charging voltage of the capacitor 8. As a result,
Since the resistance value of the thermistor 9 decreases due to heat generation, the time required for the potential of the relay 3 to reach the reset voltage from the rated voltage is shortened, and the relay voltage falls below the reset voltage of the relay faster than in the prior art. Even when the relay contact 3'is open, the inrush current can be surely passed through the inrush current limiting resistor.
【００１９】以上サーミスタを用いた実施例について説
明したが、他の実施例について以下に説明する。Although the embodiment using the thermistor has been described above, another embodiment will be described below.
【００２０】図５は、本発明の第２の実施例の主要構成
を示した図である。FIG. 5 is a diagram showing the main construction of the second embodiment of the present invention.
【００２１】本図において、図１に示した機能と同一の
ものは、同一符号を付してある。In this figure, the same functions as those shown in FIG. 1 are designated by the same reference numerals.
【００２２】図５において、電源入力部に、整流ダイオ
ード２１，電源制限用抵抗２２，コンデンサ８の充放電
時間を制御するためのリレー２５，ＡＣ電源の再投入時
の立上り時間を決定する時定数設定用コンデンサ２３，
リレー保護用ダイオード２４を設けている。In FIG. 5, a rectifier diode 21, a power supply limiting resistor 22, a relay 25 for controlling the charging / discharging time of the capacitor 8, and a time constant for determining the rising time when the AC power supply is turned on again in the power supply input section. Setting capacitor 23,
A relay protection diode 24 is provided.
【００２３】そして、リレー２５の接点２５’は抵抗２
６と直列接続し、抵抗２６の開閉を行なっている。The contact 25 'of the relay 25 has a resistance of 2
6 is connected in series to open and close the resistor 26.
【００２４】本図の場合において、ＡＣ電源が投入され
突入電流が発生した時に、リレー３がオンしてコンデン
サ８に充電された電圧は、同時にリレー２５がオンする
ことにより、抵抗２６を介して瞬時に放電することがで
きる。この場合抵抗２６はできる限り小さな抵抗値にす
るのが望ましい。In the case of this figure, when the AC power is turned on and an inrush current is generated, the voltage charged in the capacitor 8 by the relay 3 is turned on at the same time by the relay 25, so that the voltage is passed through the resistor 26. Can be instantly discharged. In this case, it is desirable that the resistance 26 has a resistance value as small as possible.
【００２５】[0025]
【発明の効果】以上説明したように、本発明の突入電流
抑圧回路は、ＡＣ電源が一度断となった後リレーの立上
り時間を決定している時定数設定用コンデンサに充電さ
れている電荷を発熱により抵抗値の下がったサーミスタ
により瞬時にリレーが復帰電圧以下になるよう放電させ
るようにしたことによって、確実に突入電流を突入電流
制限抵抗に流すことができる効果を有する。As described above, the inrush current suppressing circuit of the present invention eliminates the charge stored in the time constant setting capacitor that determines the rise time of the relay after the AC power supply is cut off once. Since the thermistor whose resistance value is lowered due to heat generation is used to instantly discharge the relay so that the relay voltage becomes equal to or lower than the reset voltage, it is possible to reliably flow the inrush current to the inrush current limiting resistor.
【図１】本発明の第１の実施例の主要回路を示す図であ
る。FIG. 1 is a diagram showing a main circuit of a first embodiment of the present invention.
【図２】図１の一部を示す図である。FIG. 2 is a diagram showing a part of FIG.
【図３】リレーの両端電圧対放電時間の関係を示す図で
ある。FIG. 3 is a diagram showing a relationship between a voltage across a relay and a discharge time.
【図４】電源ＯＮ／ＯＦＦ時のコンデンサ充放電特性を
示す図である。FIG. 4 is a diagram showing capacitor charging / discharging characteristics when the power is turned on / off.
【図５】本発明の第２の実施例の主要回路を示す図であ
る。FIG. 5 is a diagram showing a main circuit of a second embodiment of the present invention.
【図６】従来の電源入力回路を示す図である。FIG. 6 is a diagram showing a conventional power supply input circuit.
１ ＡＣ電源 ２ 突入電流吸収用抵抗 ３ リレー ３’ リレー接点 ３” リレー抵抗 ４ 整流ダイオード ５ 抵抗 ６ サージ吸収用ダイオード ７ 定電圧ダイオード ８ コンデンサ ９ サーミスタ １０ 全波整流ダイオード １１ 平滑コンデンサ １２ 負荷 ２０ 電源スイッチ ２１ ダイオード ２２ 抵抗 ２３ コンデンサ ２４ ダイオード ２５ リレー 1 AC power supply 2 Inrush current absorption resistance 3 Relay 3'Relay contact 3 "Relay resistance 4 Rectification diode 5 Resistance 6 Surge absorption diode 7 Constant voltage diode 8 Capacitor 9 Thermistor 10 Full wave rectification diode 11 Smoothing capacitor 12 Load 20 Power switch 21 diode 22 resistance 23 capacitor 24 diode 25 relay
Claims (2)
ンデンサとの間に設けられ、 前記交流電源入力の突入電流を制限する突入電流制限抵
抗と、 前記交流電源入力が定常状態の場合に、前記突入電流制
限抵抗と並列接続されて、前記突入電源制限抵抗をバイ
パスするリレー接点と、 前記交流電源入力より整流ダイオードと抵抗との直列回
路を、コンデンサ，ツェナーダイオードと前記リレーと
の並列回路に接続された前記リレー駆動回路とを有する
電源入力回路において、 前記並列回路にサーミスタを並列に取り付けたことを特
徴とする電源入力回路。1. An inrush current limiting resistor, which is provided between an AC power input and a full-wave rectifier circuit and a smoothing capacitor and limits an inrush current of the AC power input, and when the AC power input is in a steady state, A relay contact that is connected in parallel with the inrush current limiting resistor and that bypasses the inrush power limiting resistor, and a series circuit of a rectifying diode and a resistor from the AC power input, in a parallel circuit of a capacitor, a Zener diode and the relay. A power supply input circuit having the connected relay drive circuit, wherein a thermistor is attached in parallel to the parallel circuit.
ンデンサとの間に設けられ、 前記交流電源入力の突入電流を制限する突入電流制限抵
抗と、 前記交流電源入力が定常状態の場合に、前記突入電流制
限抵抗と並列接続されて前記突入電流制限抵抗をバイパ
スする第１のリレー接点と、 前記交流電源入力より第１の整流ダイオードと第１の抵
抗との第１の直列回路を第１のコンデンサ，ツェナーダ
イオードと前記第１のリレーとの第１の並列回路に接続
した第１のリレー駆動回路とを有する電源入力回路にお
いて、 前記並列回路に第２の抵抗と第２のリレー接点との直列
回路を並列に接続し、前記第１のリレー駆動回路の前段
に、第２の整流ダイオードと第２の抵抗との第１の直列
回路を第２のコンデンサと第２のリレーとの第２の並列
回路に接続した第２のリレー駆動回路とを有することを
特徴とする電源入力回路。2. An inrush current limiting resistor for limiting an inrush current of the AC power supply input, which is provided between the AC power supply input and a full-wave rectification circuit and a smoothing capacitor, and when the AC power supply input is in a steady state, A first relay contact connected in parallel with the inrush current limiting resistor to bypass the inrush current limiting resistor, and a first series circuit of a first rectifying diode and a first resistor from the AC power source input is a first series circuit. Power supply input circuit having a first relay driving circuit connected to a first parallel circuit of the first relay and a capacitor and a Zener diode, and a second resistor and a second relay contact in the parallel circuit. Is connected in parallel, and a first series circuit including a second rectifier diode and a second resistor is connected to a first stage including the second rectifier diode and the second resistor at the front stage of the first relay drive circuit. Two in parallel Power input circuit; and a second relay drive circuit connected to the road.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7154888A JP2856111B2 (en) | 1995-06-21 | 1995-06-21 | Power input circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7154888A JP2856111B2 (en) | 1995-06-21 | 1995-06-21 | Power input circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH099497A true JPH099497A (en) | 1997-01-10 |
| JP2856111B2 JP2856111B2 (en) | 1999-02-10 |
Family
ID=15594158
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7154888A Expired - Fee Related JP2856111B2 (en) | 1995-06-21 | 1995-06-21 | Power input circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2856111B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020084402A (en) * | 2001-04-30 | 2002-11-07 | 삼성전기주식회사 | Apparatus for controlling inrush current |
| JP2009509485A (en) * | 2005-09-15 | 2009-03-05 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Improved inrush current limiting device and power factor control (PFC) circuit having improved inrush current limiting device |
| CN112075002A (en) * | 2018-02-19 | 2020-12-11 | 博泽沃尔兹堡汽车零部件欧洲两合公司 | Discharge device, electric unit and discharge method |
| CN114301366A (en) * | 2021-12-24 | 2022-04-08 | 兰州飞行控制有限责任公司 | Damper switching circuit controlled by electromagnetic relay |
| WO2023029962A1 (en) * | 2021-08-31 | 2023-03-09 | 长春捷翼汽车零部件有限公司 | Circuit and method for suppressing power supply starting surge, charging apparatus, and storage medium |
-
1995
- 1995-06-21 JP JP7154888A patent/JP2856111B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020084402A (en) * | 2001-04-30 | 2002-11-07 | 삼성전기주식회사 | Apparatus for controlling inrush current |
| JP2009509485A (en) * | 2005-09-15 | 2009-03-05 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Improved inrush current limiting device and power factor control (PFC) circuit having improved inrush current limiting device |
| CN112075002A (en) * | 2018-02-19 | 2020-12-11 | 博泽沃尔兹堡汽车零部件欧洲两合公司 | Discharge device, electric unit and discharge method |
| US11554672B2 (en) | 2018-02-19 | 2023-01-17 | Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg | Discharging device, electrical unit and discharging method |
| WO2023029962A1 (en) * | 2021-08-31 | 2023-03-09 | 长春捷翼汽车零部件有限公司 | Circuit and method for suppressing power supply starting surge, charging apparatus, and storage medium |
| CN114301366A (en) * | 2021-12-24 | 2022-04-08 | 兰州飞行控制有限责任公司 | Damper switching circuit controlled by electromagnetic relay |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2856111B2 (en) | 1999-02-10 |
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