JPH0347067B2 - - Google Patents
Info
- Publication number
- JPH0347067B2 JPH0347067B2 JP60076512A JP7651285A JPH0347067B2 JP H0347067 B2 JPH0347067 B2 JP H0347067B2 JP 60076512 A JP60076512 A JP 60076512A JP 7651285 A JP7651285 A JP 7651285A JP H0347067 B2 JPH0347067 B2 JP H0347067B2
- Authority
- JP
- Japan
- Prior art keywords
- base
- switching transistor
- main switching
- winding
- 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.)
- Expired - Lifetime
Links
- 238000004804 winding Methods 0.000 claims description 19
- 239000003990 capacitor Substances 0.000 claims description 15
- 230000010355 oscillation Effects 0.000 claims description 14
- 230000000903 blocking effect Effects 0.000 claims description 8
- 238000010586 diagram Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/338—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in a self-oscillating arrangement
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、ブロツキング発振器を用いた直流安
定化電源回路に係り、特に入力電圧が100V〜
200Vのように広い範囲にわたつて変わつても安
定に動作する電源回路に関する。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a DC stabilized power supply circuit using a blocking oscillator, and in particular, the present invention relates to a DC stabilized power supply circuit using a blocking oscillator.
It relates to a power supply circuit that operates stably even when changing over a wide range such as 200V.
従来のこの種回路においては、たとえば実公昭
59−18866号公報記載のように、スイツチングト
ランジスタのベース電流を、入力電圧の大きさに
反比例する可変インピーダンス回路を用いて制御
する。しかし、回路構成がやや複雑になる難点が
あるため、さらに単純化した回路構成のものが望
まれていた。
In conventional circuits of this type, for example,
As described in Japanese Patent No. 59-18866, the base current of the switching transistor is controlled using a variable impedance circuit that is inversely proportional to the magnitude of the input voltage. However, there is a drawback that the circuit configuration is somewhat complicated, and therefore, a more simplified circuit configuration has been desired.
本発明の目的は、広範囲の入力電圧変化に対し
安定に動作するブロツキング発振形の直流安定化
電源回路を提供することにある。
An object of the present invention is to provide a blocking oscillation type DC stabilized power supply circuit that operates stably over a wide range of input voltage changes.
本発明は、ブロツキング発振形の発振トランス
に誘起する電圧が、スイツチングトランジスタの
オフ期間には、入力電圧に関係なく一定に保持さ
れるという点に着目し、スイツチングトランジス
タのベース駆動電源としてこの一定電圧を利用
し、ベース電流を制御することによりドライブ条
件を安定化させるものである。
The present invention focuses on the fact that the voltage induced in a blocking oscillation type oscillation transformer is kept constant regardless of the input voltage during the off period of the switching transistor, and uses this voltage as the base drive power source of the switching transistor. The drive conditions are stabilized by using a constant voltage and controlling the base current.
以下、第１図の実施例について説明する。これ
は交流電源１、全波整流器２、平滑用コンデンサ
３からなる直流電源を備え、さらに主スイツチン
グトランジスタ５、発振トランス３７等を備えた
ブロツキング発振形の直流安定化電源回路であ
る。主スイツチングトランジスタ５がオンの期間
に発振トランス３７に電磁エネルギーを蓄積し、
オフの期間に後段にエネルギーを供給する。２７
は安定化のための出力電圧帰還回路であり、交流
電源１からの入力電圧が100V〜200Vという様に
広範囲で変化しても、最終の直流出力電圧は一定
レベルに保持される。以上の構成は従来一般のも
のと同一である。
The embodiment shown in FIG. 1 will be described below. This is a blocking oscillation type DC stabilized power supply circuit which is equipped with a DC power supply consisting of an AC power supply 1, a full-wave rectifier 2, and a smoothing capacitor 3, and further includes a main switching transistor 5, an oscillation transformer 37, and the like. Electromagnetic energy is accumulated in the oscillation transformer 37 while the main switching transistor 5 is on,
Supplies energy to the subsequent stage during the off period. 27
is an output voltage feedback circuit for stabilization, and even if the input voltage from the AC power supply 1 changes over a wide range of 100V to 200V, the final DC output voltage is maintained at a constant level. The above configuration is the same as the conventional one.
本発明の発振トランス３７は入力巻線８、出力
巻線９を備え、さらにベース巻線１０と補助ベー
ス巻線１１を備える。補助ベース巻線１１および
出力巻線９は、主スイツチングトランジスタ５が
オフの期間に、発振トランス３７に蓄積された電
磁エネルギーをダイオード１８，２１を通して、
コンデンサ１７および２２をそれぞれ充電するよ
う巻線極性を選択する。 The oscillation transformer 37 of the present invention includes an input winding 8 and an output winding 9, and further includes a base winding 10 and an auxiliary base winding 11. The auxiliary base winding 11 and the output winding 9 pass the electromagnetic energy accumulated in the oscillation transformer 37 through the diodes 18 and 21 while the main switching transistor 5 is off.
The winding polarities are selected to charge capacitors 17 and 22, respectively.
交流電源１を投入すると、起動用抵抗４および
ベース抵抗７を通し、主スイツチングトランジス
タ５にわずかなベース電流が供給され、主スイツ
チングトランジスタ５が動作を開始する。この結
果、ベース巻線１０に誘起した電圧で、回路２６
を介し、さらにベースドライブ用トランジスタ１
３のベース・エミツタを介して主スイツチングト
ランジスタ５にベース電流を追加供給する。かく
して、主スイツチングトランジスタ５はほぼ完全
なオン状態に導かれる。次に、これが飽和してオ
フすると、補助ベース巻線１１に発生した電圧で
コンデンサ１７を充電する。その後に主スイツチ
ングトランジスタ５がオンすると、今度は先のベ
ース巻線１０からのベース電流の供給に加え、コ
ンデンサ１７の充電電圧で、前記ベースドライブ
用トランジスタ１３のコレクタ・エミツタを経由
するベース電流も供給される。 When the AC power supply 1 is turned on, a slight base current is supplied to the main switching transistor 5 through the starting resistor 4 and the base resistor 7, and the main switching transistor 5 starts operating. As a result, the voltage induced in the base winding 10 causes the circuit 26 to
Further, the base drive transistor 1
An additional base current is supplied to the main switching transistor 5 via the base-emitter of the transistor 3. Thus, the main switching transistor 5 is brought into an almost completely on state. Next, when this is saturated and turned off, the capacitor 17 is charged with the voltage generated in the auxiliary base winding 11. When the main switching transistor 5 is then turned on, in addition to the base current supplied from the base winding 10, the base current flows through the collector and emitter of the base drive transistor 13 using the charging voltage of the capacitor 17. will also be supplied.
主スイツチングトランジスタ５がオフの期間に
充電されるコンデンサ１７の電圧は、本回路がブ
ロツキング発振形の安定化電源であるため、前記
コンデンサ２２同様、入力電圧に関係なく一定値
となつている。このため、入力電圧が低いとき
も、コンデンサ１７、ベースドライブ用トランジ
スタ１３を介して十分なベース電流を主スイツチ
ングトランジスタ５へ供給することができる。 Since this circuit is a blocking oscillation type stabilized power supply, the voltage of the capacitor 17 charged while the main switching transistor 5 is off is a constant value regardless of the input voltage, like the capacitor 22. Therefore, even when the input voltage is low, a sufficient base current can be supplied to the main switching transistor 5 via the capacitor 17 and the base drive transistor 13.
６は電圧制御用トランジスタであつて、出力電
圧帰還回路２７の信号を受け出力電圧が設定値よ
り高くなつたときにオンする。これにより主スイ
ツチングトランジスタ５をオフし、出力電圧を安
定化する。 Reference numeral 6 denotes a voltage control transistor which turns on when it receives a signal from the output voltage feedback circuit 27 and the output voltage becomes higher than a set value. This turns off the main switching transistor 5 and stabilizes the output voltage.
次に、第２図の実施例について説明する。本実
施例においては、主スイツチングトランジスタ５
がオンの期間にベース巻線１０の誘起電圧によ
り、ダイオード１５、抵抗１４、ベースドライブ
用トランジスタ１３のベース・エミツタの回路を
介し主スイツチングトランジスタ５にベース電流
を供給し、そのターンオンタイミングをとる。一
方、コンデンサ１７から、ベースドライブ用トラ
ンジスタ１３のコレクタ・エミツタを介して主た
るベース電流を供給する。図中のコンデンサ１２
はスイツチングスピードを改善するためのもの
で、主スイツチングトランジスタ５のターンオン
時にコンデンサ１２からピークベース電流を供給
し、またターンオフ時には逆電位をかけることに
よりスイツチングロスを低減させる。図中の１９
と３６はコンデンサ、２０と３５は抵抗、１６は
ダイオード、２３は負荷、２４は出力電圧検知回
路、２５は一次帰還回路である。 Next, the embodiment shown in FIG. 2 will be described. In this embodiment, the main switching transistor 5
During the period when the main switching transistor 5 is on, a base current is supplied to the main switching transistor 5 by the induced voltage in the base winding 10 through the diode 15, the resistor 14, and the base-emitter circuit of the base drive transistor 13, and its turn-on timing is determined. . On the other hand, the main base current is supplied from the capacitor 17 via the collector-emitter of the base drive transistor 13. Capacitor 12 in the diagram
is intended to improve the switching speed by supplying a peak base current from the capacitor 12 when the main switching transistor 5 is turned on, and by applying a reverse potential when the main switching transistor 5 is turned off, thereby reducing switching loss. 19 in the diagram
and 36 are capacitors, 20 and 35 are resistors, 16 is a diode, 23 is a load, 24 is an output voltage detection circuit, and 25 is a primary feedback circuit.
本発明によれば、入力電圧が広範囲に変化する
場合であつても、過不足のないベース電流を供給
することができる。このため、たとえば交流
100V〜200Vの範囲の任意の電源を、電圧切換え
等の格別の操作を行うことなく接続し使用するこ
とがでできる。
According to the present invention, even when the input voltage changes over a wide range, it is possible to supply just the right amount of base current. For this reason, for example
Any power source in the range of 100V to 200V can be connected and used without special operations such as voltage switching.
第１図は本発明の実施例回路、第２図は他の実
施例回路である。
１…交流電源、２…全波整流器、３…平滑コン
デンサ、４…起動抵抗、５…主スイツチングトラ
ンジスタ、６…電圧制御用トランジスタ、７…ベ
ース制御抵抗、３７…発振トランス、８…入力巻
線、９…出力巻線、１０…ベース巻線、１１…補
助ベース巻線、１３…ベースドライブ用トランジ
スタ、１７…コンデンサ、２７…出力電圧帰還回
路。
FIG. 1 shows an example circuit of the present invention, and FIG. 2 shows another example circuit. 1... AC power supply, 2... Full wave rectifier, 3... Smoothing capacitor, 4... Starting resistor, 5... Main switching transistor, 6... Voltage control transistor, 7... Base control resistor, 37... Oscillation transformer, 8... Input winding 9... Output winding, 10... Base winding, 11... Auxiliary base winding, 13... Base drive transistor, 17... Capacitor, 27... Output voltage feedback circuit.
Claims (1)
を備え、発振トランスにベース巻線と補助ベース
巻線を設け、ベース巻線で制御され主スイツチン
グトランジスタがオンのときに導通するベースド
ライブ用トランジスタを設け、主スイツチングト
ランジスタがオフとなつたときの補助ベース巻線
の電圧で充電されるコンデンサを設け、前記コン
デンサの電荷を前記ベースドライブ用トランジス
タを介し放電して主スイツチングトランジスタを
ベースドライブするベース駆動回路を設けたこと
を特徴とするブロツキング発振形の直流安定化電
源回路。1 A main switching transistor and an oscillation transformer are provided, the oscillation transformer is provided with a base winding and an auxiliary base winding, and a base drive transistor is provided that is controlled by the base winding and conducts when the main switching transistor is on. A base drive circuit that includes a capacitor that is charged with the voltage of the auxiliary base winding when the switching transistor is turned off, and discharges the charge of the capacitor through the base drive transistor to drive the main switching transistor as a base. A blocking oscillation type DC stabilized power supply circuit characterized by providing a blocking oscillation type DC stabilized power supply circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7651285A JPS61236369A (en) | 1985-04-12 | 1985-04-12 | Dc stabilized power source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7651285A JPS61236369A (en) | 1985-04-12 | 1985-04-12 | Dc stabilized power source |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61236369A JPS61236369A (en) | 1986-10-21 |
| JPH0347067B2 true JPH0347067B2 (en) | 1991-07-18 |
Family
ID=13607315
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7651285A Granted JPS61236369A (en) | 1985-04-12 | 1985-04-12 | Dc stabilized power source |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61236369A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9240753B2 (en) | 2013-12-24 | 2016-01-19 | Fujitsu Limited | Oscillator and power management apparatus |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2294164A (en) * | 1994-10-03 | 1996-04-17 | Thomson Consumer Electronics | Switch mode power supply circuit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59155882U (en) * | 1983-04-01 | 1984-10-19 | パイオニア株式会社 | DC-DC converter |
-
1985
- 1985-04-12 JP JP7651285A patent/JPS61236369A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9240753B2 (en) | 2013-12-24 | 2016-01-19 | Fujitsu Limited | Oscillator and power management apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61236369A (en) | 1986-10-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |