JPH0823675A - Dc power source circuit - Google Patents

Dc power source circuit

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Publication number
JPH0823675A
JPH0823675A JP15494994A JP15494994A JPH0823675A JP H0823675 A JPH0823675 A JP H0823675A JP 15494994 A JP15494994 A JP 15494994A JP 15494994 A JP15494994 A JP 15494994A JP H0823675 A JPH0823675 A JP H0823675A
Authority
JP
Japan
Prior art keywords
switch
diode
full
circuit
wave rectifier
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
JP15494994A
Other languages
Japanese (ja)
Inventor
Takahiro Hara
隆裕 原
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.)
Panasonic Life Solutions Ikeda Electric Co Ltd
Original Assignee
Ikeda Electric Co 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 Ikeda Electric Co Ltd filed Critical Ikeda Electric Co Ltd
Priority to JP15494994A priority Critical patent/JPH0823675A/en
Publication of JPH0823675A publication Critical patent/JPH0823675A/en
Pending legal-status Critical Current

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  • Power Conversion In General (AREA)
  • Rectifiers (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To highly efficiently eliminate the off section of an input current and, at the same time, to reduce the high-frequency component in the input current. CONSTITUTION:A load 17 is connected between the output terminals of a full- wave rectifying current 16 through a serial circuit of a first switch 22, forward diode 25, and first choke 23 and a backward diode 24 is connected between the connecting point of the first switch 22 with the diode 25 and negative pole side of the output terminal of the rectifier circuit 16. In addition, a series circuit of a backward diode 27 and second switch 26 is connected between the connecting point of the choke 23 with a smoothing capacitor 18 and the negative pole side of the output terminal of the rectifier circuit 16 and a second choke 28 is connected between the connecting point of the backward diode 24 with the forward diode 25 and the connecting point of the second switch 26 with the backward diode 27.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、高力率で高調波成分が
少ない直流電源回路に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a DC power supply circuit having a high power factor and a small number of harmonic components.

【0002】[0002]

【従来の技術】図5は従来の直流電源回路を示し、1は
商用の交流電源、2は全波整流回路、3は負荷、4は平
滑コンデンサである。この場合、交流電源1から図6
(イ)に示すような電源電圧が供給されると、その電源
電圧が全波整流回路2によって全波整流され、全波整流
回路2の全波整流電圧を平滑コンデンサ4が平滑して、
負荷に図6(イ)に示すような出力電圧が供給される。
しかし、この場合、負荷3への入力電流は図6(ロ)に
示すように休止区間があり、低力率で高周波成分が多く
なる。また、直流出力電圧が電源電圧のピーク値と略同
一となり、出力電圧を自由に制御できないという問題が
ある。
2. Description of the Related Art FIG. 5 shows a conventional DC power supply circuit, 1 is a commercial AC power supply, 2 is a full-wave rectifier circuit, 3 is a load, and 4 is a smoothing capacitor. In this case, from the AC power supply 1 to FIG.
When the power supply voltage as shown in (a) is supplied, the power supply voltage is full-wave rectified by the full-wave rectifier circuit 2, and the full-wave rectified voltage of the full-wave rectifier circuit 2 is smoothed by the smoothing capacitor 4.
The output voltage as shown in FIG. 6A is supplied to the load.
However, in this case, the input current to the load 3 has a quiescent section as shown in FIG. 6B, and the high frequency component increases with a low power factor. Further, the DC output voltage becomes substantially the same as the peak value of the power supply voltage, and there is a problem that the output voltage cannot be freely controlled.

【0003】そこで、他の従来の直流電源回路として、
図7に示すように全波整流回路2の出力端子間に、コン
デンサ6を接続すると共に、第一スイッチ7とチョーク
8との直列回路を介して負荷3を接続し、第一スイッチ
7とチョーク8との接続点と、全波整流回路2の出力端
子の負極側との間に、逆方向のダイオード9を接続する
ようにしたものがある。
Therefore, as another conventional DC power supply circuit,
As shown in FIG. 7, a capacitor 6 is connected between the output terminals of the full-wave rectifier circuit 2, and a load 3 is connected through a series circuit of a first switch 7 and a choke 8 to connect the first switch 7 and the choke. There is one in which a diode 9 in the reverse direction is connected between the connection point with 8 and the negative side of the output terminal of the full-wave rectifier circuit 2.

【0004】この場合、図示省略のチョッパ回路により
第一スイッチ7をオンオフすることによって、負荷3へ
の出力電圧を制御できる。第一スイッチ7のオン時に電
流I 1 、第一スイッチ7のオフ時に電流I2 が流れ、第
一スイッチ7のオン期間を制御することにより出力電圧
が変化する。この場合、交流電源1から図8(イ)に示
すような電源電圧が供給されると、負荷3に図8(イ)
に示すような出力電圧が供給され、負荷3への入力電流
は図8(ロ)に示すようになり、入力電流を高力率(約
85%)にすることは可能なる。しかし、入力電流に休
止区間があるため高周波成分が多くなるという問題があ
る。
In this case, a chopper circuit (not shown) is used.
By turning the first switch 7 on and off, the load 3
The output voltage of can be controlled. When the first switch 7 is on
Flow I 1, The current I when the first switch 7 is off2Flows, first
Output voltage by controlling the ON period of one switch 7
Changes. In this case, the AC power supply 1 is shown in FIG.
When a power supply voltage such as
The output voltage as shown in is supplied and the input current to the load 3
Is as shown in Fig. 8 (b), and the input current is set to a high power factor (about
85%) is possible. However, the input current
There is a problem that the high frequency component increases due to the stop section.
It

【0005】そこで、さらに前記入力電流の休止区間を
なくすように改良した従来の直流電源回路として、図9
に示すようにチョーク8と平滑コンデンサ4との接続点
と、全波整流回路2の出力端子の負極側との間に、第二
スイッチ10を接続すると共に、チョーク8と負荷3と
の間にダイオード11を設け、第一スイッチ7と第二ス
イッチ10とを同時にオンオフして、チョーク8に蓄え
るエネルギーを利用し電源電圧が低いときでも入力電流
が流せるようにしたものがある。
Therefore, as a conventional DC power supply circuit further improved so as to eliminate the idle section of the input current, as shown in FIG.
As shown in, the second switch 10 is connected between the connection point between the choke 8 and the smoothing capacitor 4 and the negative side of the output terminal of the full-wave rectifier circuit 2, and between the choke 8 and the load 3. There is one in which a diode 11 is provided and the first switch 7 and the second switch 10 are turned on and off at the same time so that the input current can flow even when the power supply voltage is low by utilizing the energy stored in the choke 8.

【0006】この場合、交流電源1から図10(イ)に
示すような電源電圧が供給されると、負荷3に図10
(イ)に示すような出力電圧が供給され、図10(ロ)
に示すような電流I3 が流れ、負荷3への入力電流は図
10(ハ)に示すようになり、第二スイッチ10がある
ため、電源電圧が出力電圧より低くても電流I3 が流
れ、オフ時に電流I4 を流すことが可能になる。
In this case, when the AC power supply 1 supplies a power supply voltage as shown in FIG.
The output voltage as shown in (a) is supplied, and the output voltage shown in FIG.
The current I 3 as shown in Fig. 10 flows, the input current to the load 3 becomes as shown in Fig. 10C, and since the second switch 10 is provided, the current I 3 flows even if the power supply voltage is lower than the output voltage. , It becomes possible to flow the current I 4 when it is turned off.

【0007】しかし、図9の従来の直流電源回路の場
合、ダイオード11及び第二スイッチ10での電力損が
生じる為、前記図7に示す従来の直流電源回路よりも効
率が悪くなるという問題がある。
However, in the case of the conventional DC power supply circuit of FIG. 9, power loss occurs in the diode 11 and the second switch 10, so that there is a problem that the efficiency is lower than that of the conventional DC power supply circuit shown in FIG. is there.

【0008】[0008]

【発明が解決しようとする課題】本発明は、上記問題点
に鑑み、高効率で入力電流の休止区間をなくすことがで
きると共に入力電流の高周波成分を少なくできるように
したものである。
SUMMARY OF THE INVENTION In view of the above problems, the present invention is capable of highly efficiently eliminating the pause section of the input current and reducing the high frequency component of the input current.

【0009】[0009]

【課題を解決するための手段】この技術的課題を解決す
る本発明の第一の技術手段は、交流電源15を全波整流
する全波整流回路16を備え、全波整流回路16の出力
端子間に、コンデンサ21が接続されると共に、負荷1
7が接続され、負荷17に平滑コンデンサ18が並列接
続された直流電源回路において、全波整流回路16の出
力端子間に、第一スイッチ22と順方向のダイオード2
5と第一チョーク23との直列回路を介して前記負荷1
7が接続され、第一スイッチ22と順方向のダイオード
25との接続点と、全波整流回路16の出力端子の負極
側との間に、逆方向のダイオード24が接続され、第一
チョーク23と平滑コンデンサ18との接続点と、全波
整流回路2の出力端子の負極側との間に、逆方向のダイ
オード27と第二スイッチ26との直列回路が接続さ
れ、逆方向のダイオード24と順方向のダイオード25
との接続点と、第二スイッチ26とダイオード27との
接続点との間に、第二チョーク28が接続されている点
にある。
The first technical means of the present invention for solving this technical problem comprises a full-wave rectifier circuit 16 for full-wave rectifying the AC power supply 15, and an output terminal of the full-wave rectifier circuit 16. A capacitor 21 is connected in between, and the load 1
In the DC power supply circuit in which 7 is connected and the smoothing capacitor 18 is connected in parallel to the load 17, the first switch 22 and the forward diode 2 are provided between the output terminals of the full-wave rectification circuit 16.
5 through the series circuit of the first choke 23 and the load 5.
7 is connected, and the diode 24 in the reverse direction is connected between the connection point between the first switch 22 and the diode 25 in the forward direction and the negative side of the output terminal of the full-wave rectification circuit 16, and the first choke 23 is connected. A series circuit of a reverse diode 27 and a second switch 26 is connected between the connection point between the smoothing capacitor 18 and the smoothing capacitor 18 and the negative side of the output terminal of the full-wave rectifier circuit 2, and a reverse diode 24 and Forward diode 25
The second choke 28 is connected between the connection point between the second switch 26 and the diode 27 and the connection point between the second switch 26 and the diode 27.

【0010】第二の技術手段は、交流電源15を全波整
流する全波整流回路16を備え、全波整流回路16の出
力端子間に、コンデンサ21が接続されると共に、負荷
17が接続され、負荷17に平滑コンデンサ18が並列
接続された直流電源回路において、全波整流回路16の
出力端子間に、第一スイッチ22と順方向のダイオード
25と第一チョーク23との直列回路を介して前記負荷
17が接続され、第一スイッチ22と順方向のダイオー
ド25との接続点と、全波整流回路16の出力端子の負
極側との間に、逆方向のダイオード24が接続され、第
一チョーク23と平滑コンデンサ18との接続点と、全
波整流回路2の出力端子の負極側との間に、逆方向のダ
イオード27と第二スイッチ26との直列回路が接続さ
れ、逆方向のダイオード24と順方向のダイオード25
との接続点と、第二スイッチ26とダイオード27との
接続点との間に、第二チョーク28が接続され、全波整
流回路16の出力端子の負極側に、第一検出抵抗31が
直列に接続され、前記逆方向のダイオード24に第二検
出抵抗32が直列に接続され、第一検出抵抗31及び第
二検出抵抗32に流れる電流を検出して、前記第一スイ
ッチ22と第二スイッチ26とを同時にオンオフ制御す
るスイッチ制御回路33が設けられている点にある。
The second technical means is provided with a full-wave rectifier circuit 16 for full-wave rectifying the AC power supply 15. A capacitor 21 and a load 17 are connected between the output terminals of the full-wave rectifier circuit 16. , In the DC power supply circuit in which the smoothing capacitor 18 is connected in parallel to the load 17, between the output terminals of the full-wave rectifier circuit 16 via the series circuit of the first switch 22, the forward diode 25, and the first choke 23. The load 17 is connected, and the reverse diode 24 is connected between the connection point between the first switch 22 and the forward diode 25 and the negative side of the output terminal of the full-wave rectifier circuit 16. A series circuit of a diode 27 and a second switch 26 in the reverse direction is connected between the connection point between the choke 23 and the smoothing capacitor 18 and the negative side of the output terminal of the full-wave rectifier circuit 2, and the diode in the reverse direction is connected. Over de 24 and the forward direction of the diode 25
The second choke 28 is connected between the connection point of the second switch 26 and the diode 27, and the first detection resistor 31 is connected in series to the negative side of the output terminal of the full-wave rectifier circuit 16. The second detection resistor 32 is connected in series to the diode 24 in the reverse direction, and the current flowing through the first detection resistor 31 and the second detection resistor 32 is detected to detect the first switch 22 and the second switch. The point is that a switch control circuit 33 for simultaneously controlling ON and OFF of the switch 26 and the switch 26 is provided.

【0011】第三の技術手段は、交流電源15を全波整
流する全波整流回路16を備え、全波整流回路16の出
力端子間に、コンデンサ21が接続されると共に、負荷
17が接続され、負荷17に平滑コンデンサ18が並列
接続された直流電源回路において、全波整流回路16の
出力端子間に、第一スイッチ22と順方向のダイオード
25と第一チョーク23との直列回路を介して前記負荷
17が接続され、第一スイッチ22と順方向のダイオー
ド25との接続点と、全波整流回路16の出力端子の負
極側との間に、逆方向のダイオード24が接続され、第
一チョーク23と平滑コンデンサ18との接続点と、全
波整流回路2の出力端子の負極側との間に、逆方向のダ
イオード27と第二スイッチ26との直列回路が接続さ
れ、逆方向のダイオード24と順方向のダイオード25
との接続点と、第二スイッチ26とダイオード27との
接続点との間に、第二チョーク28が接続され、全波整
流回路16の出力端子の負極側に、第一検出抵抗31が
直列に接続され、前記逆方向のダイオード24に第二検
出抵抗32が直列に接続され、第一検出抵抗31及び第
二検出抵抗32に流れる電流を検出して、前記第一スイ
ッチ22と第二スイッチ23とを同時にオンオフ制御す
るスイッチ制御回路33が設けられ、該スイッチ制御回
路33は、第一スイッチ22及び第二スイッチ26をオ
ンさせた後、第一検出抵抗31の電圧が設定値以上にな
ると、第一スイッチ22及び第二スイッチ26をオフさ
せ、その後第二検出抵抗32の電圧が0になった時点で
再び第一スイッチ22及び第二スイッチ26をオンさせ
る点にある。
The third technical means is provided with a full-wave rectifier circuit 16 for full-wave rectifying the AC power supply 15. A capacitor 21 and a load 17 are connected between the output terminals of the full-wave rectifier circuit 16. , In the DC power supply circuit in which the smoothing capacitor 18 is connected in parallel to the load 17, between the output terminals of the full-wave rectifier circuit 16 via the series circuit of the first switch 22, the forward diode 25, and the first choke 23. The load 17 is connected, and the reverse diode 24 is connected between the connection point between the first switch 22 and the forward diode 25 and the negative side of the output terminal of the full-wave rectifier circuit 16. A series circuit of a diode 27 and a second switch 26 in the reverse direction is connected between the connection point between the choke 23 and the smoothing capacitor 18 and the negative side of the output terminal of the full-wave rectifier circuit 2, and the diode in the reverse direction is connected. Over de 24 and the forward direction of the diode 25
The second choke 28 is connected between the connection point of the second switch 26 and the diode 27, and the first detection resistor 31 is connected in series to the negative side of the output terminal of the full-wave rectification circuit 16. The second detection resistor 32 is connected in series to the diode 24 in the reverse direction, and the current flowing through the first detection resistor 31 and the second detection resistor 32 is detected to detect the first switch 22 and the second switch. A switch control circuit 33 for simultaneously controlling ON and OFF of 23 and 23 is provided, and the switch control circuit 33 turns on the first switch 22 and the second switch 26, and then, when the voltage of the first detection resistor 31 becomes a set value or more. The first switch 22 and the second switch 26 are turned off, and then the first switch 22 and the second switch 26 are turned on again when the voltage of the second detection resistor 32 becomes zero.

【0012】[0012]

【作用】図1または図3に示すように、第一スイッチ2
2及び第二スイッチ26のオン時に電流I1 と電流I3
とが流れ、第一スイッチ22及び第二スイッチ26のオ
フ時に電流I2 と電流I4 とが流れて、平滑コンデンサ
18を充電する。従って、入力電流に休止区間をなくし
て高周波成分を少なくすることができる。また、ダイオ
ード27及び第二スイッチ26等での電力損も少なくな
る。。
As shown in FIG. 1 or 3, the first switch 2
2 and the current I 1 and the current I 3 when the second switch 26 is turned on.
And the current I 2 and the current I 4 flow when the first switch 22 and the second switch 26 are off, and the smoothing capacitor 18 is charged. Therefore, the high frequency component can be reduced by eliminating the pause section in the input current. Further, the power loss in the diode 27, the second switch 26, etc. is reduced. .

【0013】[0013]

【実施例】以下、本発明の実施例を図面に基づいて説明
する。図1において、15は商用の交流電源、16は全
波整流回路、17は負荷、18は平滑コンデンサであ
る。全波整流回路16の出力端子間に、コンデンサ21
が接続されると共に、第一スイッチ22と順方向のダイ
オード25と第一チョーク23との直列回路を介して負
荷17が接続されている。第一スイッチ22と順方向の
ダイオード25との接続点と、全波整流回路16の出力
端子の負極側との間に、逆方向のダイオード24が接続
されている。
Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, 15 is a commercial AC power supply, 16 is a full-wave rectifier circuit, 17 is a load, and 18 is a smoothing capacitor. A capacitor 21 is provided between the output terminals of the full-wave rectifier circuit 16.
And the load 17 is connected through a series circuit of the first switch 22, the forward diode 25, and the first choke 23. The reverse diode 24 is connected between the connection point between the first switch 22 and the forward diode 25 and the negative side of the output terminal of the full-wave rectifier circuit 16.

【0014】第一チョーク23と平滑コンデンサ18と
の接続点と、全波整流回路2の出力端子の負極側との間
に、逆方向のダイオード27と第二スイッチ26との直
列回路が接続されている。逆方向のダイオード24と順
方向のダイオード25との接続点と、第二スイッチ26
とダイオード27との接続点との間に、第二チョーク2
8が接続されている。そして、図示省略のチョッパ回路
により第一スイッチ22と第二スイッチ26とを同時に
オンオフさせるように構成されている。
A series circuit of a reverse diode 27 and a second switch 26 is connected between the connection point between the first choke 23 and the smoothing capacitor 18 and the negative side of the output terminal of the full-wave rectifier circuit 2. ing. The connection point between the diode 24 in the reverse direction and the diode 25 in the forward direction, and the second switch 26.
The second choke 2 between the connection point between the diode and the diode 27.
8 are connected. The first switch 22 and the second switch 26 are simultaneously turned on / off by a chopper circuit (not shown).

【0015】上記実施例の構成によれば、図1に示すよ
うに入力電圧が出力電圧よりも高いとき第一スイッチ2
2がオンすると、電流I1 が流れ、第一スイッチ22が
オフのとき電流I2 が流れる。入力電圧と出力電圧の大
小関係に拘りなく、第一スイッチ22及び第二スイッチ
26が共にオンのとき電流I3 とが流れ、オフのとき電
流I4 が流れる。
According to the configuration of the above embodiment, the first switch 2 is operated when the input voltage is higher than the output voltage as shown in FIG.
When 2 is turned on, current I 1 flows, and when the first switch 22 is turned off, current I 2 flows. Regardless of the magnitude relationship between the input voltage and the output voltage, the current I 3 flows when the first switch 22 and the second switch 26 are both on, and the current I 4 flows when they are off.

【0016】例えば、図2に示すように入力電圧が出力
電圧より低い場合、電流I3 ,I4により負荷17へ電
力を供給する。入力電圧が出力電圧よりやや高い場合、
電流I3 ,I4 ,I1 ,I2 により負荷17へ電力を供
給する。入力電圧が出力電圧より高い場合、電流I1
2 により負荷17へ電力を供給する。従って、入力電
流に休止区間をなくして高周波成分を少なくすることが
できる。また、ダイオード27及び第二スイッチ26で
の電力損も少なくなり、効率もよくなる。
For example, when the input voltage is lower than the output voltage as shown in FIG. 2, electric power is supplied to the load 17 by the currents I 3 and I 4 . If the input voltage is slightly higher than the output voltage,
Power is supplied to the load 17 by the currents I 3 , I 4 , I 1 , and I 2 . If the input voltage is higher than the output voltage, the current I 1 ,
Power is supplied to the load 17 by I 2 . Therefore, the high frequency component can be reduced by eliminating the pause section in the input current. In addition, power loss in the diode 27 and the second switch 26 is reduced, and efficiency is improved.

【0017】図3は他の実施例を示し、全波整流回路1
6の出力端子の負極側に、第一検出抵抗31が直列に接
続され、ダイオード24に第二検出抵抗32が直列に接
続され、第一検出抵抗31及び第二検出抵抗32に流れ
る電流を検出して、前記第一スイッチ22と第二スイッ
チ26とを同時にオンオフ制御するスイッチ制御回路3
3が設けられている。
FIG. 3 shows another embodiment, which is a full-wave rectifier circuit 1.
The first detection resistor 31 is connected in series to the negative side of the output terminal of 6, the second detection resistor 32 is connected in series to the diode 24, and the current flowing through the first detection resistor 31 and the second detection resistor 32 is detected. Then, the switch control circuit 3 for controlling the first switch 22 and the second switch 26 simultaneously on and off.
3 is provided.

【0018】第一検出抵抗31により電流I1 と電流I
3 との合成値を検出し、第二検出抵抗32により電流I
2 と電流I4 との合成値を検出している。スイッチ制御
回路33は、第一スイッチ22及び第二スイッチ26を
オンさせた後、第一検出抵抗31の電圧が設定値以上に
なると、第一スイッチ22及び第二スイッチ26をオフ
させ、その後第二検出抵抗32の電圧が0になった時点
で再び第一スイッチ22及び第二スイッチ26をオンさ
せる。そして、前記設定値を変化させることにより入力
電流を正弦波にできる。即ち、交流電源1から図4
(イ)に示すような電源電圧が供給され、設定値を図4
(ロ)示すように設定すると、電流I1 と電流I3 との
合成値は図4(ハ)に示すような波形になる。
The current I 1 and the current I are detected by the first detection resistor 31.
The combined value with 3 is detected, and the current I is detected by the second detection resistor 32.
The combined value of 2 and the current I 4 is detected. The switch control circuit 33 turns on the first switch 22 and the second switch 26, and then turns off the first switch 22 and the second switch 26 when the voltage of the first detection resistor 31 becomes equal to or higher than a set value, and then turns on the first switch 22 and the second switch 26. When the voltage of the second detection resistor 32 becomes 0, the first switch 22 and the second switch 26 are turned on again. Then, the input current can be made a sine wave by changing the set value. That is, from the AC power supply 1 to FIG.
The power supply voltage as shown in (a) is supplied, and the set value is
When set as shown in (b), the combined value of the current I 1 and the current I 3 has a waveform as shown in FIG.

【0019】[0019]

【発明の効果】本発明によれば、高効率で入力電流の休
止区間をなくすことができ、しかも入力電流の高周波成
分を少なくできる。
According to the present invention, it is possible to highly efficiently eliminate the pause section of the input current and reduce the high frequency component of the input current.

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

【図1】本発明の一実施例を示す回路図である。FIG. 1 is a circuit diagram showing one embodiment of the present invention.

【図2】動作説明用の波形図である。FIG. 2 is a waveform diagram for explaining the operation.

【図3】本発明の他の実施例を示す回路図である。FIG. 3 is a circuit diagram showing another embodiment of the present invention.

【図4】動作説明用の波形図である。FIG. 4 is a waveform diagram for explaining the operation.

【図5】従来例を示す回路図である。FIG. 5 is a circuit diagram showing a conventional example.

【図6】動作説明用の波形図である。FIG. 6 is a waveform diagram for explaining the operation.

【図7】他の従来例を示す回路図である。FIG. 7 is a circuit diagram showing another conventional example.

【図8】動作説明用の波形図である。FIG. 8 is a waveform diagram for explaining the operation.

【図9】他の従来例を示す回路図である。FIG. 9 is a circuit diagram showing another conventional example.

【図10】動作説明用の波形図である。FIG. 10 is a waveform diagram for explaining the operation.

【符号の説明】[Explanation of symbols]

15 交流電源 16 全波整流回路 17 負荷 18 平滑コンデンサ 21 コンデンサ 22 第一スイッチ 23 第一チョーク 24 ダイオード 26 第二スイッチ 27 ダイオード 31 第一検出抵抗 32 第二検出抵抗 33 スイッチ制御回路 15 AC power supply 16 Full-wave rectifier circuit 17 Load 18 Smoothing capacitor 21 Capacitor 22 First switch 23 First choke 24 Diode 26 Second switch 27 Diode 31 First detection resistor 32 Second detection resistor 33 Switch control circuit

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 交流電源(15)を全波整流する全波整
流回路(16)を備え、全波整流回路(16)の出力端
子間に、コンデンサ(21)が接続されると共に、負荷
(17)が接続され、負荷(17)に平滑コンデンサ
(18)が並列接続された直流電源回路において、 全波整流回路(16)の出力端子間に、第一スイッチ
(22)と順方向のダイオード(25)と第一チョーク
(23)との直列回路を介して前記負荷(17)が接続
され、第一スイッチ(22)と順方向のダイオード(2
5)との接続点と、全波整流回路(16)の出力端子の
負極側との間に、逆方向のダイオード(24)が接続さ
れ、第一チョーク(23)と平滑コンデンサ(18)と
の接続点と、全波整流回路(2)の出力端子の負極側と
の間に、逆方向のダイオード(27)と第二スイッチ
(26)との直列回路が接続され、逆方向のダイオード
(24)と順方向のダイオード(25)との接続点と、
第二スイッチ(26)とダイオード(27)との接続点
との間に、第二チョーク(28)が接続されていること
を特徴とする直流電源回路。
1. A full-wave rectifier circuit (16) for full-wave rectifying an AC power supply (15), wherein a capacitor (21) is connected between output terminals of the full-wave rectifier circuit (16) and a load ( 17) is connected, and the smoothing capacitor (18) is connected in parallel to the load (17), the first switch (22) and the forward diode are connected between the output terminals of the full-wave rectifier circuit (16). The load (17) is connected through a series circuit of (25) and the first choke (23), and the first switch (22) and the forward diode (2) are connected.
The diode (24) in the reverse direction is connected between the connection point with 5) and the negative side of the output terminal of the full-wave rectification circuit (16), and the first choke (23) and the smoothing capacitor (18) are connected. A series circuit of a diode (27) in the reverse direction and a second switch (26) is connected between the connection point of and the negative side of the output terminal of the full-wave rectifier circuit (2). 24) and the connection point between the forward diode (25),
A DC power supply circuit characterized in that a second choke (28) is connected between a connection point of the second switch (26) and the diode (27).
【請求項2】 交流電源(15)を全波整流する全波整
流回路(16)を備え、全波整流回路(16)の出力端
子間に、コンデンサ(21)が接続されると共に、負荷
(17)が接続され、負荷(17)に平滑コンデンサ
(18)が並列接続された直流電源回路において、 全波整流回路(16)の出力端子間に、第一スイッチ
(22)と順方向のダイオード(25)と第一チョーク
(23)との直列回路を介して前記負荷(17)が接続
され、第一スイッチ(22)と順方向のダイオード(2
5)との接続点と、全波整流回路(16)の出力端子の
負極側との間に、逆方向のダイオード(24)が接続さ
れ、第一チョーク(23)と平滑コンデンサ(18)と
の接続点と、全波整流回路(2)の出力端子の負極側と
の間に、逆方向のダイオード(27)と第二スイッチ
(26)との直列回路が接続され、逆方向のダイオード
(24)と順方向のダイオード(25)との接続点と、
第二スイッチ(26)とダイオード(27)との接続点
との間に、第二チョーク(28)が接続され、全波整流
回路(16)の出力端子の負極側に、第一検出抵抗(3
1)が直列に接続され、前記逆方向のダイオード(2
4)に第二検出抵抗(32)が直列に接続され、第一検
出抵抗(31)及び第二検出抵抗(32)に流れる電流
を検出して、前記第一スイッチ(22)と第二スイッチ
(26)とを同時にオンオフ制御するスイッチ制御回路
(33)が設けられていることを特徴とする直流電源回
路。
2. A full-wave rectifier circuit (16) for full-wave rectifying an AC power supply (15), wherein a capacitor (21) is connected between output terminals of the full-wave rectifier circuit (16) and a load ( 17) is connected, and the smoothing capacitor (18) is connected in parallel to the load (17), the first switch (22) and the forward diode are connected between the output terminals of the full-wave rectifier circuit (16). The load (17) is connected through a series circuit of (25) and the first choke (23), and the first switch (22) and the forward diode (2) are connected.
The diode (24) in the reverse direction is connected between the connection point with 5) and the negative side of the output terminal of the full-wave rectification circuit (16), and the first choke (23) and the smoothing capacitor (18) are connected. A series circuit of a diode (27) in the reverse direction and a second switch (26) is connected between the connection point of and the negative side of the output terminal of the full-wave rectifier circuit (2). 24) and the connection point between the forward diode (25),
The second choke (28) is connected between the connection point of the second switch (26) and the diode (27), and the first detection resistor () is connected to the negative side of the output terminal of the full-wave rectifier circuit (16). Three
1) are connected in series and the reverse diode (2
The second detection resistor (32) is connected in series to 4), and the current flowing through the first detection resistor (31) and the second detection resistor (32) is detected to detect the first switch (22) and the second switch. A direct-current power supply circuit, characterized in that a switch control circuit (33) for simultaneously controlling ON and OFF of (26) and (26) is provided.
【請求項3】 交流電源(15)を全波整流する全波整
流回路(16)を備え、全波整流回路(16)の出力端
子間に、コンデンサ(21)が接続されると共に、負荷
(17)が接続され、負荷(17)に平滑コンデンサ
(18)が並列接続された直流電源回路において、 全波整流回路(16)の出力端子間に、第一スイッチ
(22)と順方向のダイオード(25)と第一チョーク
(23)との直列回路を介して前記負荷(17)が接続
され、第一スイッチ(22)と順方向のダイオード(2
5)との接続点と、全波整流回路(16)の出力端子の
負極側との間に、逆方向のダイオード(24)が接続さ
れ、第一チョーク(23)と平滑コンデンサ(18)と
の接続点と、全波整流回路(2)の出力端子の負極側と
の間に、逆方向のダイオード(27)と第二スイッチ
(26)との直列回路が接続され、逆方向のダイオード
(24)と順方向のダイオード(25)との接続点と、
第二スイッチ(26)とダイオード(27)との接続点
との間に、第二チョーク(28)が接続され、全波整流
回路(16)の出力端子の負極側に、第一検出抵抗(3
1)が直列に接続され、前記逆方向のダイオード(2
4)に第二検出抵抗(32)が直列に接続され、第一検
出抵抗(31)及び第二検出抵抗(32)に流れる電流
を検出して、前記第一スイッチ(22)と第二スイッチ
(26)とを同時にオンオフ制御するスイッチ制御回路
(33)が設けられ、該スイッチ制御回路(33)によ
り、第一スイッチ(22)及び第二スイッチ(26)を
オンさせた後、第一検出抵抗(31)の電圧が設定値以
上になると、第一スイッチ(22)及び第二スイッチ
(26)をオフさせ、その後第二検出抵抗(32)の電
圧が0になった時点で再び第一スイッチ(22)及び第
二スイッチ(26)をオンさせることを特徴とする直流
電源回路。
3. A full-wave rectifier circuit (16) for full-wave rectifying an AC power supply (15), wherein a capacitor (21) is connected between output terminals of the full-wave rectifier circuit (16) and a load ( 17) is connected, and the smoothing capacitor (18) is connected in parallel to the load (17), the first switch (22) and the forward diode are connected between the output terminals of the full-wave rectifier circuit (16). The load (17) is connected through a series circuit of (25) and the first choke (23), and the first switch (22) and the forward diode (2) are connected.
The diode (24) in the reverse direction is connected between the connection point with 5) and the negative side of the output terminal of the full-wave rectification circuit (16), and the first choke (23) and the smoothing capacitor (18) are connected. A series circuit of a diode (27) in the reverse direction and a second switch (26) is connected between the connection point of and the negative side of the output terminal of the full-wave rectifier circuit (2). 24) and the connection point between the forward diode (25),
The second choke (28) is connected between the connection point of the second switch (26) and the diode (27), and the first detection resistor () is connected to the negative side of the output terminal of the full-wave rectifier circuit (16). Three
1) are connected in series and the reverse diode (2
The second detection resistor (32) is connected in series to 4), and the current flowing through the first detection resistor (31) and the second detection resistor (32) is detected to detect the first switch (22) and the second switch. A switch control circuit (33) for simultaneously controlling ON and OFF of (26) and (26) is provided. After the switch control circuit (33) turns on the first switch (22) and the second switch (26), the first detection When the voltage of the resistor (31) becomes equal to or higher than the set value, the first switch (22) and the second switch (26) are turned off, and then, when the voltage of the second detection resistor (32) becomes 0, the first switch is again turned on. A DC power supply circuit, characterized in that a switch (22) and a second switch (26) are turned on.
JP15494994A 1994-07-06 1994-07-06 Dc power source circuit Pending JPH0823675A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15494994A JPH0823675A (en) 1994-07-06 1994-07-06 Dc power source circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15494994A JPH0823675A (en) 1994-07-06 1994-07-06 Dc power source circuit

Publications (1)

Publication Number Publication Date
JPH0823675A true JPH0823675A (en) 1996-01-23

Family

ID=15595445

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15494994A Pending JPH0823675A (en) 1994-07-06 1994-07-06 Dc power source circuit

Country Status (1)

Country Link
JP (1) JPH0823675A (en)

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