JPH0223109Y2 - - Google Patents
Info
- Publication number
- JPH0223109Y2 JPH0223109Y2 JP2124284U JP2124284U JPH0223109Y2 JP H0223109 Y2 JPH0223109 Y2 JP H0223109Y2 JP 2124284 U JP2124284 U JP 2124284U JP 2124284 U JP2124284 U JP 2124284U JP H0223109 Y2 JPH0223109 Y2 JP H0223109Y2
- Authority
- JP
- Japan
- Prior art keywords
- transistor
- resistor
- voltage
- oscillation
- starting
- 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
Links
- 230000010355 oscillation Effects 0.000 claims description 27
- 238000004804 winding Methods 0.000 claims description 13
- 239000003990 capacitor Substances 0.000 claims description 4
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 230000003321 amplification Effects 0.000 description 5
- 238000003199 nucleic acid amplification method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000007796 conventional method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
Landscapes
- Dc-Dc Converters (AREA)
Description
【考案の詳細な説明】
(イ) 技術分野
本考案は発振用トランジスタのベース電流を起
動時と起動後とによつて変化するようにして発振
トランジスタの直流増幅率に差があつても、また
温度変化に余り左右されず安定に動作するリンギ
ングチヨークコンバータの起動回路に関する。[Detailed explanation of the invention] (a) Technical field The present invention changes the base current of the oscillation transistor between startup and after startup, so that even if there is a difference in the DC amplification factor of the oscillation transistor, The present invention relates to a starting circuit for a ringing choke converter that operates stably without being affected by temperature changes.
(ロ) 従来技術
従来リンギングチヨークコンバータは第１図に
示すように直流入力電圧Vioが印加し発振トラン
ジスタ１を起動させて発振トランスホーマ２より
構成される発振回路によりパルス電圧を発振さ
せ、第３巻線n3で発生する電圧を変圧整流し出力
電圧V0を得ている。この発振を起動させるため
に入力電圧VINを投入したとき、その入力３，
３′の正極側入力３から発振トランジスタ１のベ
ースに接続された起動抵抗４を通じてベース電流
i1が流れ、発振トランジスタ１を「オン」とし発
振を起動させる。しかし起動抵抗４を一定とする
だけではベース電流i1は一定であつて発振トラン
ジスタ１によつては動作しにくいものを生ずる。
一般にトランジスタのエミツタ接地における直流
電流増幅率hfeはコレクタ電流iC、ベース電流iBと
するとその比、すなわちiC／iBであらわせる。(b) Prior art As shown in FIG. 1, in the conventional ringing chain converter, a DC input voltage V io is applied to activate the oscillation transistor 1 and cause the oscillation circuit composed of the oscillation transformer 2 to oscillate a pulse voltage. The voltage generated in the third winding n3 is transformed and rectified to obtain the output voltage V0 . When the input voltage V IN is applied to start this oscillation, the input 3,
The base current flows from the positive input 3 of 3' through the starting resistor 4 connected to the base of the oscillation transistor 1.
i1 flows, turning on the oscillation transistor 1 and starting oscillation. However, if the starting resistor 4 is simply kept constant, the base current i 1 will be constant, making it difficult for the oscillation transistor 1 to operate.
Generally, the DC current amplification factor h fe when the emitter of a transistor is grounded is expressed by the ratio of the collector current i C and the base current i B , that is, i C /i B.
(ハ) 従来の問題点
したがつて従来のようにベースへの抵抗が一定
で、ベース電流i1が一定の場合、直流電流増幅率
hfeの低いトランジスタ、または低温時に直流電
流増幅率hfeが低下するようなものにあつては、
起動に充分なコレクタ電流iCが得られず起動し難
い欠点がある。また発振トランジスタ１のベース
の起動抵抗４を小さくし、ベース電流i1が大とな
るようなときには、発振トランジスタ１のカツト
オフ時には「オフ」とすることが難しくなるとと
もに、「オフ」のときのベースとエミツタ間のレ
ベルが高くなり発熱が大きくなる欠点がある。(c) Problems with the conventional method Therefore, when the resistance to the base is constant and the base current i1 is constant as in the conventional case, the DC current amplification factor
For transistors with low h fe or those whose DC current amplification factor h fe decreases at low temperatures,
The drawback is that it is difficult to start up because sufficient collector current i C cannot be obtained for starting up. In addition, when the starting resistance 4 at the base of the oscillation transistor 1 is made small and the base current i 1 becomes large, it becomes difficult to turn the oscillation transistor 1 off when it is cut off, and the This has the disadvantage that the level between the and the emitter becomes high and heat generation increases.
(ニ) 本考案の目的
本考案の目的は従来のかかる欠点を除き、発振
トランジスタ１が起動するまではベース電流i1を
大とし、起動後は小となるようにして発振の起動
を容易にするにある。(d) Purpose of the present invention The purpose of the present invention is to eliminate such drawbacks of the conventional method, and to easily start oscillation by increasing the base current i 1 until the oscillation transistor 1 starts up and decreasing it after starting up. There is something to do.
(ホ) 本考案の構成
本考案は第２図に示す如く入力巻線n1、出力巻
線n2及びドライブ巻線n3よりなるトランス２と、
直流電源端子３，３′よりの直流入力電圧が前記
トランスの入力巻線n1を介して発振トランジスタ
ー１のコレクターに印加せられ、該トランジスタ
ー１のエミツターが直流電源端子の負極３′に接
続され、前記ドライブ巻線n3に誘記される電圧が
前記トランジスター１のベースに印加されてなる
リンギングチヨークコンバータにおいて、直流電
源の正極端子３に接続された抵抗５と並列に起動
用トランジスター７のコレクターとエミツターと
を接続し、一端を直流電源の正極端子３に接続し
た抵抗９とコンデンサー１０との並列回路よりな
るフライバツクサージ電圧吸収回路の他端と電圧
電源の負端子３′との間に挿入された抵抗１１と
の接続点Ａをダイオード８を介して前記トランジ
スタ７のベースに接続すると共に、前記接続点Ａ
をダイオード１２を介して発振トランジスター１
のコレクターに接続し、且つ前記抵抗５と前記起
動トランジスター７のコレクターとの接続点と前
記発振トランジスター１のベースとを抵抗６を介
して接続してなるリンギングチヨークコンバータ
の起動回路である。(e) Structure of the present invention As shown in Fig. 2, the present invention comprises a transformer 2 consisting of an input winding n 1 , an output winding n 2 and a drive winding n 3 ;
A DC input voltage from the DC power terminals 3, 3' is applied to the collector of the oscillating transistor 1 via the input winding n1 of the transformer, and the emitter of the transistor 1 is connected to the negative pole 3' of the DC power terminal. , in a ringing chain converter in which the voltage induced in the drive winding n3 is applied to the base of the transistor 1, a starting transistor 7 is connected in parallel to a resistor 5 connected to the positive terminal 3 of the DC power supply. A flyback surge voltage absorption circuit consisting of a parallel circuit of a resistor 9 and a capacitor 10, which connects the collector and the emitter and has one end connected to the positive terminal 3 of the DC power supply, and the other end of the circuit is connected to the negative terminal 3' of the voltage power supply. The connection point A with the resistor 11 inserted in the is connected to the base of the transistor 7 via the diode 8, and the connection point A
oscillating transistor 1 via diode 12
This is a starting circuit for a ringing choke converter, in which the connection point between the resistor 5 and the collector of the starting transistor 7 and the base of the oscillating transistor 1 are connected via a resistor 6.
(ヘ) 本考案の実施例
第２図は本考案によるリンギングチヨークコン
バータの１実施例を示す。発振トランジスタ１に
接続される起動抵抗は抵抗５と抵抗６とを直列に
接続し、従来の起動抵抗の抵抗値R0に対し、抵
抗５と抵抗６との抵抗値をそれぞれR1，R2とす
ると
R0＝R1＋R2 および R1＞R2
となるように選択し、且つ抵抗５に並列にPNP
トランジスタのような起動用トランジスタ７を接
続する。(f) Embodiment of the present invention FIG. 2 shows an embodiment of the ringing chain yoke converter according to the present invention. The starting resistor connected to the oscillation transistor 1 has a resistor 5 and a resistor 6 connected in series, and the resistance values of the resistor 5 and the resistor 6 are R 1 and R 2 respectively, compared to the resistance value R 0 of the conventional starting resistor. Then, select R 0 = R 1 + R 2 and R 1 > R 2 , and connect PNP in parallel with resistor 5.
A starting transistor 7 such as a transistor is connected.
いま入力電圧VINを印加すると起動用トランジ
スタ７はエミツタ，ベースを介してダイオード
８、抵抗９を通じてベース電流が流れ「オン」と
なり抵抗５は短絡状態となるので発振トランジス
タ１のベースには抵抗６を通じてベース電流i2が
流れる。しかし抵抗６は従来の抵抗４より小なる
ためi2＞i1となり起動し易くなる。 Now, when input voltage V IN is applied, base current flows through the emitter and base of starting transistor 7 through diode 8 and resistor 9, turning it "on" and short-circuiting resistor 5. Therefore, resistor 6 is connected to the base of oscillation transistor 1. A base current i2 flows through. However, since the resistor 6 is smaller than the conventional resistor 4, i 2 >i 1 and it becomes easier to start.
ついで発振トランジスタ１が起動すると、この
コレクタ・エミツタ間に第３図のように入力電圧
VINと発振トランスホーマの一次巻線n1と二次巻
線n2との巻数比n1／n2と出力電圧V0とによつて
生ずる電圧Ｅとが加わつた第３図のような電圧
VCEが発生する。したがつてフライバツクサージ
電圧吸収用抵抗９およびコンデンサ１０の接続点
Ａにおける電圧VFは入力電圧VINより高いVIN+E
となる。このために起動用トランジスタ７はエミ
ツタ−ベース間では逆電圧となり「オフ」となり
発振トランジスタ１のベース抵抗はR1＋R2とな
りベース電流はi1となり従来と同様な発振を保持
する。 Next, when the oscillation transistor 1 starts up, the input voltage is applied between the collector and emitter as shown in Figure 3.
The voltage E generated by V IN , the turns ratio n 1 /n 2 of the primary winding n 1 and the secondary winding n 2 of the oscillation transformer, and the output voltage V 0 is added as shown in FIG. Voltage
V CE occurs. Therefore, the voltage V F at the connection point A between the flyback surge voltage absorbing resistor 9 and the capacitor 10 is V IN+E higher than the input voltage V IN .
becomes. For this reason, the starting transistor 7 has a reverse voltage between its emitter and base, turning it off, and the base resistance of the oscillation transistor 1 becomes R 1 +R 2 , and the base current becomes i 1 , maintaining the same oscillation as in the prior art.
(ト) 本考案の効果
以上に述べたように本考案によれば発振トラン
ジスタ１の直流増幅率hfeに差があつても、また
温度変化で差を生じても、あまりこれに左右され
ずリンギングチヨークコンバータの使用が可能と
なる。したがつて低温時でも容易に発振の起動を
行うことができる。(G) Effects of the present invention As described above, according to the present invention, even if there is a difference in the DC amplification factor h fe of the oscillation transistor 1, or even if a difference occurs due to temperature change, it will not be affected much by this. It becomes possible to use a ringing chain yoke converter. Therefore, oscillation can be easily started even at low temperatures.
第１図は従来のリンギングチヨークコンバータ
の回路図、第２図は本考案の実施例によるリンギ
ングチヨークコンバータの回路図、第３図は本考
案の実施例による回路における発振トランジスタ
のコレクタ・エミツタ間における電圧波形であ
る。
なお図において１：発振トランジスタ、２：ト
ランス、３，３′：入力、４，５，６，９，１
１：抵抗、７：起動用トランジスタ、８，１２：
ダイオード、１０：コンデンサ。
Figure 1 is a circuit diagram of a conventional ringing chain converter, Figure 2 is a circuit diagram of a ringing chain converter according to an embodiment of the present invention, and Figure 3 is a collector-emitter diagram of an oscillating transistor in a circuit according to an embodiment of the present invention. This is the voltage waveform between. In the figure, 1: oscillation transistor, 2: transformer, 3, 3': input, 4, 5, 6, 9, 1
1: Resistor, 7: Starting transistor, 8, 12:
Diode, 10: Capacitor.
Claims (1)
りなるトランス２と、直流電源端子３，３′より
の直流入力電圧が前記トランスの入力巻線n1を介
して発振トランジスター１のコレクターに印加せ
られ、該トランジスター１のエミツターが直流電
源電圧端子の負極３′に接続され、前記ドライブ
巻線n3に誘起される電圧が前記トランジスター１
のベースに印加されてなるリンギングチヨークコ
ンバータにおいて、直流電源の正極端子３に接続
された抵抗５と並列に起動用トランジスター７の
コレクターとエミツターとを接続し、一端を直流
電源の正極端子３に接続した抵抗９とコンデンサ
ー１０との並列回路よりなるフライバツクサージ
電圧吸収回路の他端と電圧電源の負端子３′との
間に挿入された抵抗１１との接続点Ａをダイオー
ド８を介して前記トランジスタ７のベースに接続
すると共に、前記接続点Ａをダイオード１２を介
して発振トランジスター１のコレクターに接続
し、且つ前記抵抗５と前記起動トランジスター７
のコレクターとの接続点と前記発振トランジスタ
ー１のベースとを抵抗６を介して接続してなるリ
ンギングチヨークコンバータの起動回路。 A transformer 2 consists of an input winding n 1 , an output winding n 2 and a drive winding n 3 , and the DC input voltage from the DC power supply terminals 3 and 3' is applied to the oscillation transistor 1 through the input winding n 1 of the transformer. The emitter of the transistor 1 is connected to the negative pole 3' of the DC power supply voltage terminal, and the voltage induced in the drive winding n3 is applied to the collector of the transistor 1.
In the ringing chain converter, the collector and emitter of the starting transistor 7 are connected in parallel with the resistor 5 connected to the positive terminal 3 of the DC power supply, and one end is connected to the positive terminal 3 of the DC power supply. A connection point A with a resistor 11 inserted between the other end of the flyback surge voltage absorption circuit consisting of a parallel circuit of a connected resistor 9 and a capacitor 10 and the negative terminal 3' of the voltage power source is connected through a diode 8. It is connected to the base of the transistor 7, and the connection point A is connected to the collector of the oscillation transistor 1 via the diode 12, and the resistor 5 and the starting transistor 7 are connected to each other.
A starting circuit for a ringing chain yoke converter is formed by connecting a connection point with the collector of the oscillation transistor 1 to the base of the oscillation transistor 1 via a resistor 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2124284U JPS60135084U (en) | 1984-02-18 | 1984-02-18 | Ringing choke converter startup circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2124284U JPS60135084U (en) | 1984-02-18 | 1984-02-18 | Ringing choke converter startup circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60135084U JPS60135084U (en) | 1985-09-07 |
| JPH0223109Y2 true JPH0223109Y2 (en) | 1990-06-22 |
Family
ID=30512459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2124284U Granted JPS60135084U (en) | 1984-02-18 | 1984-02-18 | Ringing choke converter startup circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60135084U (en) |
-
1984
- 1984-02-18 JP JP2124284U patent/JPS60135084U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60135084U (en) | 1985-09-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH06276731A (en) | Self-excited dc-dc converter | |
| JPH0223109Y2 (en) | ||
| JPH0729752Y2 (en) | Self-exciting inverter | |
| JPH039278Y2 (en) | ||
| JPS6126303B2 (en) | ||
| JPS6029240Y2 (en) | Transistor drive circuit | |
| JPH0210797Y2 (en) | ||
| JPH019275Y2 (en) | ||
| JPH0811061Y2 (en) | DC-DC converter | |
| JPH0423515B2 (en) | ||
| JP3029726B2 (en) | Resonant inverter circuit | |
| JPS5934075B2 (en) | transistor inverter | |
| SU536573A1 (en) | Stabilized dc voltage converter | |
| JPS587833Y2 (en) | Jirei Hatsu Singata Converter Souch | |
| JP2000287460A (en) | Self-exciting switching power supply circuit | |
| JPS5911440Y2 (en) | Power supply circuit for flash discharge light emitter | |
| SU647665A2 (en) | Ac voltage stabilizer | |
| JPS603677Y2 (en) | High voltage DC/DC converter | |
| JPH01126162A (en) | Power circuit | |
| JPS5838068B2 (en) | Single-stone DC-DC converter | |
| JPS6223544B2 (en) | ||
| JPS6127939B2 (en) | ||
| JPS5952628B2 (en) | inverter circuit | |
| JP2001025252A (en) | Ringing choke converter | |
| JPH0516271B2 (en) |