JPH0557807B2 - - Google Patents
Info
- Publication number
- JPH0557807B2 JPH0557807B2 JP61191305A JP19130586A JPH0557807B2 JP H0557807 B2 JPH0557807 B2 JP H0557807B2 JP 61191305 A JP61191305 A JP 61191305A JP 19130586 A JP19130586 A JP 19130586A JP H0557807 B2 JPH0557807 B2 JP H0557807B2
- Authority
- JP
- Japan
- Prior art keywords
- current
- supply circuit
- power supply
- coil
- auxiliary winding
- 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.)
- Expired - Lifetime
Links
- 238000004804 winding Methods 0.000 claims description 22
- 230000005284 excitation Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Landscapes
- Direct Current Feeding And Distribution (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は電源回路に関し、特に平滑用のチヨー
クコイルを有する電源回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a power supply circuit, and particularly to a power supply circuit having a smoothing coil.
従来、この種の電源回路は、第３図に示すよう
に、チヨークコイル３０１とコンデンサ１０６か
らなる平滑回路を有していた。
Conventionally, this type of power supply circuit has had a smoothing circuit consisting of a chiyoke coil 301 and a capacitor 106, as shown in FIG.
上述した従来の電源回路は、チヨークコイルに
交流成分と同時に直流の負荷電流が流れるように
なつているので、負荷電流が大きい場合、直流励
磁によりチヨークコイルの鉄心が飽和しないよ
う、充分大きな鉄心を選択する必要があり、回路
の小型化が困難になるという問題点がある。
In the conventional power supply circuit described above, a DC load current flows through the Chi-Yoke coil at the same time as an AC component, so when the load current is large, a sufficiently large core must be selected so that the core of the Chi-Yoke coil does not become saturated due to DC excitation. However, there is a problem in that it is difficult to miniaturize the circuit.
本発明の目的は、回路の小型化が可能な電源回
路を提供することにある。 An object of the present invention is to provide a power supply circuit that can be miniaturized.
本発明の電源回路は、主巻線と補助巻線を有す
るチヨークコイルと、負荷電流が該チヨークコイ
ルの前記主巻線を流れることによつて発生する磁
界を打消す方向に前記補助巻線に電流を供給する
電流供給回路とを有している。
The power supply circuit of the present invention includes a chiyoke coil having a main winding and an auxiliary winding, and a current flowing through the auxiliary winding in a direction to cancel a magnetic field generated when a load current flows through the main winding of the chiyoke coil. and a current supply circuit for supplying current.
次に、本発明について図面を参照して説明す
る。
Next, the present invention will be explained with reference to the drawings.
第１図は本発明の第１の実施例の回路図であ
る。 FIG. 1 is a circuit diagram of a first embodiment of the present invention.
第１図に示すように、第１の実施例は主巻線１
０２と補助巻線１０３を有するチヨークコイル１
０１と、抵抗１０５からなる電流供給回路１０４
とコンデンサ１０６と、負荷抵抗１０７とを有す
る。 As shown in FIG. 1, the first embodiment has a main winding 1
02 and auxiliary winding 103
01 and a current supply circuit 104 consisting of a resistor 105.
, a capacitor 106 , and a load resistor 107 .
なお、１１０はリプルを含んだ直流入力電源で
あり、補助巻線１０３には電流供給回路１０４を
介して主巻線１０２の出力が供給される。 Note that 110 is a DC input power supply containing ripple, and the output of the main winding 102 is supplied to the auxiliary winding 103 via a current supply circuit 104.
いま、主巻線１０２の出力電圧をＶ、抵抗１０
５の抵抗値をＲ、主巻線１０２の巻数をN1、補
助巻線１０３の巻数をN2とすると、チヨークコ
イル１０１の鉄心には、「N2×Ｖ／Ｒ」の逆励磁
がかかる為、N2≫N1の条件を満足させると、最
大負荷電流I0が流れたときの直流励磁を「N1×I0
−N2×Ｖ／Ｒ」に低減することができる。 Now, the output voltage of the main winding 102 is V, and the resistance 10
5 is R, the number of turns of the main winding 102 is N1 , and the number of turns of the auxiliary winding 103 is N2 , then the iron core of the chiyoke coil 101 is subjected to reverse excitation of " N2 × V/R". , N 2 ≫ N 1 , the DC excitation when the maximum load current I 0 flows is ``N 1 × I 0
−N 2 ×V/R”.
第２図は本発明の第２の実施例の回路図であ
る。 FIG. 2 is a circuit diagram of a second embodiment of the invention.
第２図に示すように、第２の実施例では、電流
供給回路２０１は差動増幅器２０２と電流検出抵
抗２０３とトランジスタ２０４と電流バイアス抵
抗２０５からなり、電流検出抵抗２０３により負
荷電流を検出し、検出値を差動増幅器２０２で増
幅してトランジスタ２０４を駆動することによ
り、補助巻線１０３に負荷電流に比例した電流を
流す。 As shown in FIG. 2, in the second embodiment, a current supply circuit 201 includes a differential amplifier 202, a current detection resistor 203, a transistor 204, and a current bias resistor 205, and the current detection resistor 203 detects the load current. , the detected value is amplified by the differential amplifier 202 and the transistor 204 is driven, thereby causing a current proportional to the load current to flow through the auxiliary winding 103.
最大負荷時の直流励磁を打消すように補助巻線
１０３の巻数と駆動電流を設定すればチヨークコ
イル１０１の直流励磁をほぼ零にすることができ
る。 By setting the number of turns of the auxiliary winding 103 and the drive current so as to cancel the DC excitation at maximum load, the DC excitation of the choke coil 101 can be reduced to almost zero.
以上説明したように本発明の電源回路は、チヨ
ークコイルに設ける補助巻線と、負荷電流がその
チヨークコイルの主巻線を流れることによつて生
じる磁界を打消す方向に補助巻線電流を供給する
電流供給回路とを設けることにより、負荷電流に
よつてチヨークコイルの鉄心にかかる直流励磁を
打消すことができるので、鉄心の飽和レベルを小
さく設定でき、チヨークコイルの小型化が可能と
なり、必然的に、回路を小型化できるという効果
がある。
As explained above, the power supply circuit of the present invention includes an auxiliary winding provided in a chiyoke coil, and a current that supplies the auxiliary winding current in a direction that cancels the magnetic field generated when the load current flows through the main winding of the chiyoke coil. By providing a supply circuit, it is possible to cancel the DC excitation applied to the iron core of the Chi-Yoke coil by the load current, so the saturation level of the iron core can be set to a small value, making it possible to downsize the Chi-Yoke coil. This has the effect of making it more compact.
第１図は本発明の第１の実施例の回路図、第２
図は本発明の第２の実施例の回路図、第３図は従
来の電源回路の一例の回路図である。
１０１…チヨークコイル、１０２…主巻線、１
０３…補助巻線、１０４…電流供給回路、１０５
…抵抗、１０６…コンデンサ、１０７…負荷抵
抗、１１０…直流入力電源、２０１…電流供給回
路、２０２…差動増幅器、２０３…電流検出抵
抗、２０４…トランジスタ、２０５…電流バイア
ス抵抗、３０１…チヨークコイル。
FIG. 1 is a circuit diagram of the first embodiment of the present invention;
The figure is a circuit diagram of a second embodiment of the present invention, and FIG. 3 is a circuit diagram of an example of a conventional power supply circuit. 101...Chiyoke coil, 102...Main winding, 1
03...Auxiliary winding, 104...Current supply circuit, 105
...Resistor, 106...Capacitor, 107...Load resistance, 110...DC input power supply, 201...Current supply circuit, 202...Differential amplifier, 203...Current detection resistor, 204...Transistor, 205...Current bias resistor, 301...Choice coil.
Claims (1)
と、負荷電流が該チヨークコイルの前記主巻線を
流れることによつて発生する磁界を打消す方向に
前記補助巻線に電流を供給する電流供給回路とを
有する電源回路。 ２ 電流供給回路は負荷電流に比例して電流値が
制御される電流制御電流源である特許請求の範囲
第１項記載の電源回路。[Claims] 1. A chiyoke coil having a main winding and an auxiliary winding, and a current flowing through the auxiliary winding in a direction that cancels a magnetic field generated when a load current flows through the main winding of the chiyoke coil. and a power supply circuit that supplies current. 2. The power supply circuit according to claim 1, wherein the current supply circuit is a current controlled current source whose current value is controlled in proportion to the load current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61191305A JPS6348125A (en) | 1986-08-14 | 1986-08-14 | Electric source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61191305A JPS6348125A (en) | 1986-08-14 | 1986-08-14 | Electric source circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6348125A JPS6348125A (en) | 1988-02-29 |
| JPH0557807B2 true JPH0557807B2 (en) | 1993-08-25 |
Family
ID=16272351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61191305A Granted JPS6348125A (en) | 1986-08-14 | 1986-08-14 | Electric source circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6348125A (en) |
-
1986
- 1986-08-14 JP JP61191305A patent/JPS6348125A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6348125A (en) | 1988-02-29 |
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