JPH0583944A - Power supply equipment - Google Patents
Power supply equipmentInfo
- Publication number
- JPH0583944A JPH0583944A JP3239199A JP23919991A JPH0583944A JP H0583944 A JPH0583944 A JP H0583944A JP 3239199 A JP3239199 A JP 3239199A JP 23919991 A JP23919991 A JP 23919991A JP H0583944 A JPH0583944 A JP H0583944A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- power
- supply equipment
- discharge
- output voltage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はインバータ，ＡＣサーボ
ドライバ等に使用する電源装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device used for an inverter, an AC servo driver and the like.
【０００２】[0002]
【従来の技術】一般にこの種の電源装置は図３に示すよ
うに構成されている。すなわちＡＣ整流平滑コンデンサ
Ｃの両端に放電抵抗Ｒ1を接続し、ＡＣ電源ＯＦＦ時
に、コンデンサの電荷を放電抵抗Ｒ1を通して放電させ
るようになっている。2. Description of the Related Art Generally, a power supply device of this type is constructed as shown in FIG. That is, the discharge resistor R 1 is connected to both ends of the AC rectifying / smoothing capacitor C, and when the AC power is turned off, the electric charge of the capacitor is discharged through the discharge resistor R 1 .
【０００３】[0003]
【発明が解決しようとする課題】ところで放電時間を短
くするためには、放電抵抗を小さくする必要があり、通
常動作時の放電抵抗の消費電力が大きくなる。また、消
費電力を小さくするためには抵抗値を大きくする必要が
あるが、その反面放電時間が長くなる。By the way, in order to shorten the discharge time, it is necessary to reduce the discharge resistance, which increases the power consumption of the discharge resistance during normal operation. Further, in order to reduce the power consumption, it is necessary to increase the resistance value, but on the other hand, the discharge time becomes long.
【０００４】本発明は上記課題を解決するもので、通常
動作時は低消費電力でＡＣ電源ＯＦＦ時の放電時間が短
い電源装置の提供を目的とする。The present invention solves the above problems, and an object of the present invention is to provide a power supply device which consumes low power during normal operation and has a short discharge time when the AC power supply is turned off.
【０００５】[0005]
【課題を解決するための手段】本発明は上記目的を達成
するために、ＡＣ電源のＯＦＦを検知するためにＡＣ受
電検知回路と、整流出力電圧端子間に抵抗器とトランジ
スタスイッチの直列回路を備えた構成を有する。In order to achieve the above object, the present invention includes an AC power receiving detection circuit for detecting OFF of an AC power source, and a series circuit of a resistor and a transistor switch between rectified output voltage terminals. It has a configuration provided.
【０００６】[0006]
【作用】本発明は上記構成において、ＡＣ電源ＯＦＦ時
にこれをＡＣ受電検知回路にて検知し、その信号によっ
てトランジスタスイッチを導通させ、低抵抗Ｒ2を通し
て整流出力電圧の急速な放電を行うこととなる。According to the present invention, in the above configuration, when the AC power supply is turned off, this is detected by the AC power receiving detection circuit, the transistor switch is made conductive by the signal, and the rectified output voltage is rapidly discharged through the low resistance R 2. Become.
【０００７】[0007]
【実施例】図１に本発明の電源装置の回路図を示す。Ａ
Ｃ電源ＯＦＦ時にＡＣ受電検知回路１によって、ＡＣ電
源ＯＦＦを検知し、その信号によってトランジスタ２を
導通させ、抵抗３を通して整流電圧を放電させるように
なっている。1 is a circuit diagram of a power supply device according to the present invention. A
When the C power source is OFF, the AC power receiving detection circuit 1 detects the AC power source OFF, the transistor 2 is made conductive by the signal, and the rectified voltage is discharged through the resistor 3.
【０００８】図２にＡＣ受電検知回路を示す。この回路
においてはＡＣ受電時にはツェナーダイオードＤ4がＯ
Ｎし、ホトカプラＩＣがＯＮし、制御信号はＬとなる。
ＡＣ電源ＯＦＦ時にはＤ4がＯＦＦし、ＩＣがＯＦＦと
なり、制御信号がＨとなり、この制御信号によってトラ
ンジスタＱ（図１）を導通させる。FIG. 2 shows an AC power reception detection circuit. In this circuit, the Zener diode D 4 is O when receiving AC power.
N, the photocoupler IC is turned on, and the control signal becomes L.
When the AC power is off, D 4 is off, the IC is off, the control signal is high, and the control signal causes the transistor Q (FIG. 1) to conduct.
【０００９】このように本発明の実施例の電源装置によ
れば、整流出力端に低抵抗とトランジスタを直列接続し
た放電路を設け、このトランジスタをＡＣ電源ＯＦＦ時
に導通させて、整流電圧を急速に放電する。As described above, according to the power supply device of the embodiment of the present invention, the rectification output terminal is provided with the discharge path in which the low resistance and the transistor are connected in series, and the transistor is made conductive when the AC power supply is turned off to rapidly generate the rectified voltage. To discharge.
【００１０】[0010]
【発明の効果】上記実施例から明らかなように、本発明
によれば、低消費電力化、低コスト化、小型化が図れ、
放電時間が短くなるため、サービス時の感電を防止でき
る電源装置を提供できる。As is apparent from the above embodiments, according to the present invention, it is possible to reduce power consumption, cost, and size.
Since the discharge time is shortened, it is possible to provide a power supply device that can prevent electric shock during service.
【図１】本発明の一実施例の電源装置の回路図FIG. 1 is a circuit diagram of a power supply device according to an embodiment of the present invention.
【図２】同装置のＡＣ受電検知回路の回路図FIG. 2 is a circuit diagram of an AC power reception detection circuit of the device.
【図３】従来の電源装置の回路図FIG. 3 is a circuit diagram of a conventional power supply device.
１ ＡＣ受電検知回路 ２ トランジスタ ３ 抵抗器 1 AC power detection circuit 2 Transistor 3 Resistor
Claims (1)
電検知回路と、整流出力電圧端子間に抵抗器とトランジ
スタスイッチの直列回路を備え、前記ＡＣ受電検知回路
がＡＣ電源ＯＦＦを検知したとき、前記トランジスタス
イッチを導通させるようにした電源装置。1. An AC power receiving detection circuit for detecting AC power OFF of a device, and a series circuit of a resistor and a transistor switch between rectified output voltage terminals, wherein when the AC power receiving detection circuit detects AC power OFF, A power supply device configured to make the transistor switch conductive.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3239199A JPH0583944A (en) | 1991-09-19 | 1991-09-19 | Power supply equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3239199A JPH0583944A (en) | 1991-09-19 | 1991-09-19 | Power supply equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0583944A true JPH0583944A (en) | 1993-04-02 |
Family
ID=17041205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3239199A Pending JPH0583944A (en) | 1991-09-19 | 1991-09-19 | Power supply equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0583944A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002262573A (en) * | 2001-02-28 | 2002-09-13 | Nichicon Corp | Power device |
| JP2008301623A (en) * | 2007-05-31 | 2008-12-11 | Daikin Ind Ltd | Balancing circuit with discharge function |
| JP2009165208A (en) * | 2007-12-28 | 2009-07-23 | Daikin Ind Ltd | Discharging circuit for converters |
-
1991
- 1991-09-19 JP JP3239199A patent/JPH0583944A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002262573A (en) * | 2001-02-28 | 2002-09-13 | Nichicon Corp | Power device |
| JP2008301623A (en) * | 2007-05-31 | 2008-12-11 | Daikin Ind Ltd | Balancing circuit with discharge function |
| JP2009165208A (en) * | 2007-12-28 | 2009-07-23 | Daikin Ind Ltd | Discharging circuit for converters |
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