JPH0564366A - Power supply device - Google Patents
Power supply deviceInfo
- Publication number
- JPH0564366A JPH0564366A JP3253020A JP25302091A JPH0564366A JP H0564366 A JPH0564366 A JP H0564366A JP 3253020 A JP3253020 A JP 3253020A JP 25302091 A JP25302091 A JP 25302091A JP H0564366 A JPH0564366 A JP H0564366A
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- output
- current
- load
- switching transistor
- 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
- 238000001514 detection method Methods 0.000 claims description 4
- 230000007257 malfunction Effects 0.000 abstract description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 1
Landscapes
- Direct Current Feeding And Distribution (AREA)
- Dc-Dc Converters (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、電子機器の電源装置
に係り、特にオプションボード等を追加拡張し得る構成
を備えたパーソナルコンピュータおよびワークステーシ
ョン等の電子機器のように負荷の消費電流の増大が予測
される機器の電源に好適な電源装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device for electronic equipment, and more particularly to an increase in current consumption of a load such as electronic equipment such as personal computers and workstations having a structure in which option boards can be additionally expanded. The present invention relates to a power supply device suitable for a power supply of a device that is predicted to be.
【０００２】[0002]
【従来の技術】一般に、パーソナルコンピュータあるい
はワークステーション等においては、例えば増設用メモ
リボード、各種インタフェースボード、音源ボード等の
オプションボード、およびハードディスク装置等の周辺
装置を追加拡張するための拡張スロット等の構成を備え
ている。このような周辺装置の一部およびオプションボ
ードのほとんどは、パーソナルコンピュータあるいはワ
ークステーション等の機器本体の電源から電力の供給を
受ける。2. Description of the Related Art Generally, in a personal computer or workstation, for example, an expansion memory board, various interface boards, option boards such as a sound source board, and expansion slots for additionally expanding peripheral devices such as hard disk devices It has a configuration. Part of such peripheral devices and most of the option boards are supplied with power from the power source of the device body such as a personal computer or a workstation.
【０００３】このような電子機器においては、追加拡張
されたオプションボードおよび周辺装置（以下、「増設
ボード等」と称する）の数が多くなってこれらによる消
費電流が大きくなると、機器本体からの電源供給が不足
することがある。このような場合には、機器本体に対す
る電力供給が不十分となって、機器本体が正常に動作で
きなくなったり、増設ボード等に対する電力供給が不十
分となって、増設ボード等が正常に動作できなくなった
りする。したがって、このようなおそれがある場合に
は、機器本体の電源とは別に増設ボード等に専用の電源
を設ける必要がある。In such an electronic device, when the number of option boards and peripheral devices (hereinafter referred to as "expansion boards" and the like) that have been expanded additionally increases and the current consumption by these increases, the power supply from the device main body increases. The supply may be insufficient. In such a case, the power supply to the device main unit becomes insufficient and the device main unit cannot operate normally, or the power supply to the extension board etc. becomes insufficient and the expansion board etc. can operate normally. It will disappear. Therefore, if there is such a possibility, it is necessary to provide a dedicated power source for the extension board or the like in addition to the power source for the device body.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、増設ボ
ード等の電源を全て別電源により供給するようにと、機
器本体の電源の電力供給能力が無駄になる。また、この
場合、機器本体の電源の電圧と別電源の電圧とは完全に
一致することはほとんどないため、この電源電圧の不一
致が誤動作の原因になるおそれもある。However, if all the power supplies for the extension boards and the like are supplied by separate power supplies, the power supply capacity of the power supply of the device body is wasted. Further, in this case, the voltage of the power source of the device main body and the voltage of the other power source are rarely completely matched with each other. Therefore, the mismatch of the power source voltage may cause a malfunction.
【０００５】この発明は、上述のような事情に鑑みてな
されたもので、機器本体の電源の出力を有効に使用し
て、前記電源の出力以上の電力を増設ボード等に供給す
ることができて、しかも機器本体および増設ボード等の
誤動作のおそれもない電源装置を提供することを目的と
している。The present invention has been made in view of the above circumstances, and it is possible to effectively use the output of the power source of the device main body and supply the power more than the output of the power source to the extension board or the like. Moreover, it is an object of the present invention to provide a power supply device in which there is no risk of malfunctions of the device body and expansion boards.
【０００６】[0006]
【課題を解決するための手段】この発明に係る電源装置
は、主電源手段と、負荷電流の大きさを検出する負荷電
流検出手段と、この負荷電流検出手段により検出される
負荷電流の大きさに応じて動作し、前記主電源手段の出
力に加算して負荷に電流を供給する補助電源手段とを具
備し、前記主電源手段の出力の不足分を前記補助電源手
段から電流加算により補うことを特徴としている。SUMMARY OF THE INVENTION A power supply device according to the present invention comprises a main power supply means, a load current detection means for detecting the magnitude of a load current, and a load current magnitude detected by the load current detection means. And auxiliary power supply means for supplying a current to the load by adding to the output of the main power supply means, and supplementing the shortage of the output of the main power supply means by current addition from the auxiliary power supply means. Is characterized by.
【０００７】[0007]
【作用】この発明の電源装置においては、機器本体の電
源すなわち主電源の出力を無駄にすることなく、電力の
不足分だけを補助電源から主電源の出力に電流加算して
増設ボード等に供給するので、増設ボード等に供給され
る電源電圧ももとの主電源電圧に完全に一致し機器本体
および増設ボード等の誤動作のおそれもない。すなわ
ち、この発明の電源装置では、主電源から負荷に供給さ
れる電流を検出して、不足分を補助電源から電流加算す
ることによって、電流容量を増している。In the power supply device of the present invention, the power shortage of the power source of the main body of the equipment, that is, the output of the main power source is not wasted, and only the shortage of the power is added to the output of the main power source from the auxiliary power source and supplied to the expansion board or the like. Therefore, the power supply voltage supplied to the expansion board or the like completely matches the original main power supply voltage, and there is no fear of malfunction of the device body or expansion board or the like. That is, in the power supply device of this invention, the current capacity supplied from the main power supply to the load is detected, and the shortage is added from the auxiliary power supply to increase the current capacity.
【０００８】[0008]
【実施例】以下、図面を参照して、この発明の実施例を
説明する。図１は、この発明の第１の実施例に係る電源
装置の構成を示している。図１において、パーソナルコ
ンピュータ等の機器本体１と増設ボード等の負荷２との
間には補助電源部３が設けられる。機器本体１の電源す
なわち主電源１１の出力は負荷２に接続される。主電源
１１は、例えば５Ｖの安定化電源であるとする。主電源
１１から負荷２への接続線すなわち電源ラインの一方、
例えば正側の電源ラインＰには、その電源ラインＰを流
れる電流値に応じた信号を出力する電流トランス（変流
器）等の電流検出器１２が設けられ、この電流検出器１
２の出力は増幅器１３により適宜増幅され、検出電流値
に応じた電圧として出力される。増幅器１３の出力は、
その信号を変調波としてＰＷＭ（パルス幅変調）を行う
ＰＷＭ制御回路１４に与えらる。ＰＷＭ制御回路１４
は、所定の繰り返し周波数（キャリア周波数）で且つ増
幅器１３の出力に応じてパルス幅が変化するパルス列か
らなるＰＷＭ信号を出力する。このＰＷＭ信号は、スイ
ッチングトランジスタ１５のベースに与えられる。スイ
ッチングトランジスタ１５のエミッタは、例えば１０Ｖ
の補助電源１６の正側に接続され、補助電源１６の負側
は負側の電源ラインＮに接続される。スイッチングトラ
ンジスタ１５のコレクタは、コイル１７を介して正側の
電源ラインＰに接続される。スイッチングトランジスタ
１５のコレクタは、また、ダイオード１８を介して負側
の電源ラインＮに接続されている。ダイオード１８のカ
ソードは、スイッチングトランジスタ１５のコレクタ
に、アノードは負側の電源ラインＮにそれぞれ接続され
ている。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of a power supply device according to a first embodiment of the present invention. In FIG. 1, an auxiliary power supply unit 3 is provided between a device body 1 such as a personal computer and a load 2 such as an extension board. The power supply of the device body 1, that is, the output of the main power supply 11 is connected to the load 2. The main power supply 11 is, for example, a stabilized power supply of 5V. One of the connection lines from the main power supply 11 to the load 2, that is, the power supply line,
For example, the positive power supply line P is provided with a current detector 12 such as a current transformer (current transformer) that outputs a signal according to the value of the current flowing through the power supply line P.
The output of 2 is appropriately amplified by the amplifier 13 and output as a voltage according to the detected current value. The output of the amplifier 13 is
The signal is supplied as a modulated wave to the PWM control circuit 14 that performs PWM (pulse width modulation). PWM control circuit 14
Outputs a PWM signal having a predetermined repetition frequency (carrier frequency) and a pulse train whose pulse width changes according to the output of the amplifier 13. This PWM signal is given to the base of the switching transistor 15. The emitter of the switching transistor 15 has, for example, 10V.
Is connected to the positive side of the auxiliary power supply 16, and the negative side of the auxiliary power supply 16 is connected to the negative power supply line N. The collector of the switching transistor 15 is connected to the positive power supply line P via the coil 17. The collector of the switching transistor 15 is also connected to the negative power supply line N via the diode 18. The cathode of the diode 18 is connected to the collector of the switching transistor 15, and the anode thereof is connected to the negative power supply line N.
【０００９】次に、このように構成された電源装置の動
作を説明する。スイッチングトランジスタ１５、補助電
源１６およびコイル１７は、補助電源１６の出力をスイ
ッチングトランジスタ１５でオン／オフするシリーズ型
チョッパとして構成され、スイッチングトランジスタ１
５は、ＰＷＭ制御回路１４の出力によりオン／オフ駆動
される。ＰＷＭ制御回路１４は、電流検出器１２から増
幅器１３を介して得られる検出電流値に応じて、パルス
幅つまりデューティ比が変化するパルスでスイッチング
トランジスタ１５を駆動する。Next, the operation of the power supply device configured as described above will be described. The switching transistor 15, the auxiliary power supply 16 and the coil 17 are configured as a series type chopper in which the output of the auxiliary power supply 16 is turned on / off by the switching transistor 15.
5 is ON / OFF driven by the output of the PWM control circuit 14. The PWM control circuit 14 drives the switching transistor 15 with a pulse whose pulse width, that is, the duty ratio, changes according to the detected current value obtained from the current detector 12 via the amplifier 13.
【００１０】主電源１１から負荷２への供給電流をＩ
1 、補助電源１６から負荷２への供給電流をＩ2 とする
と、電流検出器１２で検出される電流はＩ1 である。図
２に示すように、主電源１１の出力電流Ｉ1 が所定値、
例えば機器本体１の一定の許容電流ＩR 、を超えようと
すると、不足分が補助電源１６からの供給電流Ｉ2 で補
われ、主電源１１の出力電流Ｉ1 の増加が抑えられる。
この場合、電流検出器１２の検出電流値に応じて動作す
るＰＷＭ制御回路１４の出力パルス幅の変化特性および
パルス繰り返し周波数等の動作特性を、スイッチングト
ランジスタ１５のスイッチング動作により、スイッチン
グトランジスタ１５、補助電源１６およびコイル１７か
らなるシリーズ型チョッパが上述の適切な電流値を出力
するように調整しておく。負荷２には、主電源１１の出
力電流Ｉ1 に補助電源１６からの供給電流Ｉ2 が電流加
算されて、充分な電流ＩL （＝Ｉ1 ＋Ｉ2 ）が供給され
る。The current supplied from the main power source 11 to the load 2 is I
1 and the current supplied from the auxiliary power supply 16 to the load 2 is I 2 , the current detected by the current detector 12 is I 1 . As shown in FIG. 2, the output current I 1 of the main power supply 11 is a predetermined value,
For example, if the constant allowable current I R of the device body 1 is exceeded, the shortage is compensated by the supply current I 2 from the auxiliary power supply 16, and the increase of the output current I 1 of the main power supply 11 is suppressed.
In this case, the change characteristics of the output pulse width and the operation characteristics such as the pulse repetition frequency of the PWM control circuit 14 that operates according to the detected current value of the current detector 12 are changed by the switching operation of the switching transistor 15 by the switching transistor 15 and the auxiliary operation. The series type chopper including the power supply 16 and the coil 17 is adjusted so as to output the appropriate current value. The load 2 is supplied with a sufficient current I L (= I 1 + I 2 ) by summing the output current I 1 of the main power supply 11 and the supply current I 2 from the auxiliary power supply 16.
【００１１】機器本体１の主電源１１の出力は、負荷２
と直結しており、補助電源１６からの出力電流Ｉ2 は主
電源１１から負荷２への供給電流Ｉ1 に電流加算される
ので、負荷２に供給される電圧は、機器本体１の主電源
１１で決定される。上述の電源装置によれば、主電源１
１の出力の不足分だけを別途に設けた補助電源から電流
加算して供給するため、機器本体１の主電源１１は有効
に利用することができる。負荷２に供給される電源電圧
が機器本体１の主電源１１からの供給電圧と完全に同じ
になるので動作が安定し、誤動作もなくなる。The output of the main power supply 11 of the device body 1 is the load 2
Since the output current I 2 from the auxiliary power supply 16 is added to the supply current I 1 from the main power supply 11 to the load 2, the voltage supplied to the load 2 is the main power supply of the device body 1. It is decided at 11. According to the above power supply device, the main power supply 1
Since only the shortage of the output of No. 1 is added and supplied from the separately provided auxiliary power supply, the main power supply 11 of the device body 1 can be effectively used. Since the power supply voltage supplied to the load 2 is completely the same as the supply voltage from the main power supply 11 of the device body 1, the operation is stable and malfunction does not occur.
【００１２】また、上述の補助電源部３の回路は、機器
本体１の主電源１１から負荷２への電源ラインに付加す
るだけでよく、補助電源部３の回路を設けるために主電
源１１から負荷２への電源ラインを切断する必要もな
い。したがって、補助電源部３の回路は、機器本体１に
増設用電源部として増設することもでき、増設ボード等
に搭載することもできる。なお、機器本体１の主電源１
１の電源電圧が例えば５Ｖと８Ｖ等のように複数種類あ
っても、上述の補助電源部３の回路は、補助電源１６に
よる出力自体に電圧値を持たずに、電流加算される主電
源１１の出力に合わせて動作するため、１種類の回路で
複数の電源電圧に対応することができる。The above-mentioned circuit of the auxiliary power supply unit 3 need only be added to the power supply line from the main power supply 11 of the device body 1 to the load 2, and the main power supply 11 is provided to provide the circuit of the auxiliary power supply unit 3. It is not necessary to disconnect the power line to the load 2. Therefore, the circuit of the auxiliary power supply unit 3 can be added to the device body 1 as an additional power supply unit, or can be mounted on an extension board or the like. The main power supply 1 of the device body 1
Even if there are plural kinds of power supply voltage of 1 such as 5 V and 8 V, the circuit of the above-mentioned auxiliary power supply unit 3 does not have a voltage value in the output itself from the auxiliary power supply 16 and the main power supply 11 for current addition Since it operates in accordance with the output of the above, one type of circuit can handle a plurality of power supply voltages.
【００１３】なお、上述した図１の回路は、補助電源部
３にシリーズ型チョッパの回路を用いたので、補助電源
１６の電圧を１０Ｖとすると、１０Ｖ以下の主電源電圧
のみに対応できることになるが、これを補助電源の電源
電圧を超えた主電源電圧にも対応するようにするには次
のようにすればよい。図３はこの発明の第２の実施例に
係る電源装置の構成を示している。図３において、図１
と同様の部分には同符号を付してその詳細な説明を省略
する。機器本体１と負荷２との間には補助電源部４が設
けられる。主電源１１から負荷２への電源ラインの一
方、例えば正側の電源ラインＰには電流検出器１２が設
けられ、この電流検出器１２の出力は増幅器１３により
適宜増幅される。増幅器１３の出力はＰＷＭ制御回路１
４に与えらる。ＰＷＭ制御回路１４から出力されるＰＷ
Ｍ信号は、スイッチングトランジスタ１５のベースに与
えられる。スイッチングトランジスタ１５のエミッタ
は、例えば１０Ｖの補助電源２１の正側に接続され、補
助電源２１の負側は正側の電源ラインＰに接続される。
スイッチングトランジスタ１５のコレクタは、コイル１
７を介して正側の電源ラインＰに接続される。スイッチ
ングトランジスタ１５のコレクタは、また、図示極性の
ダイオード１８を介して負側の電源ラインＮに接続され
ている。Since the circuit of FIG. 1 described above uses a series type chopper circuit for the auxiliary power supply unit 3, if the voltage of the auxiliary power supply 16 is set to 10V, only the main power supply voltage of 10V or less can be supported. However, in order to make it compatible with the main power supply voltage exceeding the power supply voltage of the auxiliary power supply, the following may be done. FIG. 3 shows the configuration of a power supply device according to the second embodiment of the present invention. In FIG. 3, FIG.
The same reference numerals are given to the same portions as and detailed description thereof will be omitted. An auxiliary power supply unit 4 is provided between the device body 1 and the load 2. A current detector 12 is provided on one of the power supply lines from the main power supply 11 to the load 2, for example, the positive power supply line P, and the output of this current detector 12 is appropriately amplified by an amplifier 13. The output of the amplifier 13 is the PWM control circuit 1
Give to 4. PW output from the PWM control circuit 14
The M signal is given to the base of the switching transistor 15. The emitter of the switching transistor 15 is connected to the positive side of the auxiliary power supply 21 of 10 V, for example, and the negative side of the auxiliary power supply 21 is connected to the positive power supply line P.
The collector of the switching transistor 15 is the coil 1
It is connected to the positive power supply line P via 7. The collector of the switching transistor 15 is also connected to the negative power supply line N via the diode 18 having the illustrated polarity.
【００１４】スイッチングトランジスタ１５、補助電源
２１およびコイル１７からなるシリーズ型チョッパは、
補助電源２１の出力をスイッチングトランジスタ１５で
オン／オフして所定の出力を得る。ＰＷＭ制御回路１４
は、電流検出器１２から増幅器１３を介して得られる検
出電流値に応じて、パルス幅つまりデューティ比が変化
するパルスでスイッチングトランジスタ１５を駆動す
る。この場合、補助電源部４の出力は、補助電源２１の
出力電圧により主電源１１の出力電圧を制限しないの
で、主電源１１の出力電圧が補助電源２１の出力電圧よ
りも高い場合にも電流加算を行うことができる。The series type chopper consisting of the switching transistor 15, the auxiliary power source 21 and the coil 17 is
The output of the auxiliary power supply 21 is turned on / off by the switching transistor 15 to obtain a predetermined output. PWM control circuit 14
Drives the switching transistor 15 with a pulse whose pulse width, that is, the duty ratio, changes according to the detected current value obtained from the current detector 12 through the amplifier 13. In this case, the output of the auxiliary power supply unit 4 does not limit the output voltage of the main power supply 11 by the output voltage of the auxiliary power supply 21, so current addition is performed even when the output voltage of the main power supply 11 is higher than the output voltage of the auxiliary power supply 21. It can be performed.
【００１５】[0015]
【発明の効果】以上述べたように、この発明によれば、
機器本体の主電源の出力を無駄にすることなく、電力の
不足分だけを補助電源から主電源の出力に電流加算して
増設ボード等に供給するようにして、機器本体の電源の
出力を有効に使用し、前記電源の出力以上の電力を増設
ボード等に供給することができて、しかも機器本体およ
び増設ボード等の誤動作のおそれもない電源装置を提供
することができる。As described above, according to the present invention,
Without wasting the output of the main power supply of the device main body, add only the shortage of power to the output of the main power supply from the auxiliary power supply and supply it to the expansion board etc. to enable the output of the power supply of the device main body Therefore, it is possible to provide a power supply device which can be used for the above-mentioned purpose and can supply more power than the output of the power supply to the expansion board or the like, and in which there is no fear of malfunction of the device body or the expansion board.
【図１】 この発明の第１の実施例に係る電源装置の構
成を示す回路構成図である。FIG. 1 is a circuit configuration diagram showing a configuration of a power supply device according to a first embodiment of the present invention.
【図２】 図１の実施例の動作を説明するための電流特
性図である。FIG. 2 is a current characteristic diagram for explaining the operation of the embodiment of FIG.
【図３】 この発明の第２の実施例に係る電源装置の構
成を示す回路構成図である。FIG. 3 is a circuit configuration diagram showing a configuration of a power supply device according to a second embodiment of the present invention.
１…機器本体、２…負荷、３，４…補助電源部、１１…
主電源、１２…電流検出器、１３…増幅器、１４…ＰＷ
Ｍ制御回路、１５…スイッチングトランジスタ、１６，
２１…補助電源、１７…コイル、１８…ダイオード1 ... Equipment body, 2 ... Load, 3, 4 ... Auxiliary power supply section, 11 ...
Main power supply, 12 ... Current detector, 13 ... Amplifier, 14 ... PW
M control circuit, 15 ... Switching transistor, 16,
21 ... Auxiliary power supply, 17 ... Coil, 18 ... Diode
Claims (1)
さに応じて動作し、前記主電源手段の出力に加算して負
荷に電流を供給する補助電源手段とを具備し、前記主電
源手段の出力の不足分を前記補助電源手段から電流加算
により補うことを特徴とする電源装置。1. A main power supply means, a load current detection means for detecting a magnitude of a load current, and an output of the main power supply means which operates according to a magnitude of a load current detected by the load current detection means. And an auxiliary power supply means for supplying a current to a load by adding the current to the auxiliary power supply means, and the shortage of the output of the main power supply means is supplemented by current addition from the auxiliary power supply means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25302091A JP3163680B2 (en) | 1991-09-04 | 1991-09-04 | Power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25302091A JP3163680B2 (en) | 1991-09-04 | 1991-09-04 | Power supply |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0564366A true JPH0564366A (en) | 1993-03-12 |
| JP3163680B2 JP3163680B2 (en) | 2001-05-08 |
Family
ID=17245370
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25302091A Expired - Fee Related JP3163680B2 (en) | 1991-09-04 | 1991-09-04 | Power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3163680B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007236159A (en) * | 2006-03-03 | 2007-09-13 | Ricoh Co Ltd | Power supply device and image forming apparatus |
| JP2010140509A (en) * | 1996-11-04 | 2010-06-24 | Mobility Electronics Inc | System and method for adapting computer peripheral |
-
1991
- 1991-09-04 JP JP25302091A patent/JP3163680B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010140509A (en) * | 1996-11-04 | 2010-06-24 | Mobility Electronics Inc | System and method for adapting computer peripheral |
| JP2007236159A (en) * | 2006-03-03 | 2007-09-13 | Ricoh Co Ltd | Power supply device and image forming apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3163680B2 (en) | 2001-05-08 |
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