[go: up one dir, main page]

JPS59175377A - Power source - Google Patents

Power source

Info

Publication number
JPS59175377A
JPS59175377A JP58048992A JP4899283A JPS59175377A JP S59175377 A JPS59175377 A JP S59175377A JP 58048992 A JP58048992 A JP 58048992A JP 4899283 A JP4899283 A JP 4899283A JP S59175377 A JPS59175377 A JP S59175377A
Authority
JP
Japan
Prior art keywords
transformer
transformers
secondary side
transistor
load
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
JP58048992A
Other languages
Japanese (ja)
Inventor
Toshiaki Matsui
松井 俊朗
Koji Suzuki
鈴木 孝二
Joji Nagahira
譲二 永平
Kazuyoshi Takahashi
一義 高橋
Kunio Yoshihara
吉原 邦男
Tadashi Ishikawa
正 石川
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.)
Canon Inc
Original Assignee
Canon Inc
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 Canon Inc filed Critical Canon Inc
Priority to JP58048992A priority Critical patent/JPS59175377A/en
Publication of JPS59175377A publication Critical patent/JPS59175377A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of DC power input into DC power output
    • H02M3/22Conversion of DC power input into DC power output with intermediate conversion into AC
    • H02M3/24Conversion of DC power input into DC power output with intermediate conversion into AC by static converters
    • H02M3/28Conversion 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
    • H02M3/325Conversion 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
    • H02M3/335Conversion 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Direct Current Feeding And Distribution (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE:To simplify the circuit configuration, to reduce the number of parts and to improve the reliability of the circuit by driving a plurality of switching transistors and inverter transformer by one drive means. CONSTITUTION:A transistor Tr4 is driven by a pulse width variable oscillator (PWM) 1, and switching transistors Tr1-Tr3 are driven through a transformer T4. The voltages raised in accordance with the arbitrary ratio of number of turns of the windings from the secondary sides of transformers T1-T3 are produced. A load current is inputted at the secondary side of a high voltage transformer T3 through a detecting resistor R6 to a comparator Q1, and the PWM 1 is controlled in response to the compared output. In this manner, the load currents of the secondary side of the high transformers are regulated in response to the variation in the load.

Description

【発明の詳細な説明】 技術分野 本発明は電源装置に係り、特にスイッチングトランジス
タにより高圧トランスの1次側を発振させ2次側に出力
を取り出すいわゆるDC−DCインバータなどの電源装
置に関するものである。
[Detailed Description of the Invention] Technical Field The present invention relates to a power supply device, and more particularly to a power supply device such as a so-called DC-DC inverter that uses a switching transistor to oscillate the primary side of a high-voltage transformer and outputs an output to the secondary side. .

従来技術 従来複写機の帯電器など特に定電流出力が必要な電源装
置には上記のようなりC−DCインバータによる′電源
装置が用いられている。
BACKGROUND OF THE INVENTION Conventional power supplies that require a constant current output, such as chargers for copying machines, use a C-DC inverter as described above.

特に複写機においては、複数個の異なる帯電器のだにそ
れぞれ異なる高圧トランスおよびその駆動口・洛を設け
るのが普通である。高圧トランス1次側のスイッチング
トランジスタを駆動するためにさらにスイッチングトラ
ンジスタおよび駆動トランスをその前段に接続した大電
流用の電源装置を用いる場合にはこの駆動用のトランス
およびトランジスタもそれぞれのスイッチングトランジ
スタの前段に別個に設けていたので、装置全体が大型化
し、また部品点数も増えるのでコストアンプにつながる
という欠点があった。
Particularly in copying machines, it is common to provide a plurality of different chargers with different high-voltage transformers and their drive ports. In order to drive the switching transistors on the primary side of the high-voltage transformer, when using a large current power supply device in which a switching transistor and a driving transformer are connected in the preceding stage, these driving transformers and transistors are also connected in the preceding stage of each switching transistor. Since the device was provided separately, the entire device became larger and the number of parts increased, which led to an increase in cost.

目    的 本発明は以上の問題点に鑑みてなされたもので簡単安価
にまた小型に構成することができる電源装置を提供する
ことを目的とする。
Purpose The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a power supply device that can be constructed easily, inexpensively, and compactly.

実施例 以下図面に示す実施例に基づき本発明の詳細な説明する
EXAMPLES The present invention will be described in detail below based on examples shown in the drawings.

図は本発明の電源装置の一実施例を示すもので、ここで
は3個の高圧トランスおよびそのそれぞれの1次側に設
けられた3個のスイッチングトランジスタにより複数の
負荷に給電を行なう電源装置が例示されている。図にお
いて符号′I゛1で示されるものは高圧トランスで、こ
の高圧トランスTIの2個の2次巻線にはダイオードD
、 、 D2、コンデンサC,、C2からそれぞれ形成
される整流、平滑回路を介して負荷抵抗R,、R2がそ
れぞれ接続される。
The figure shows an embodiment of the power supply device of the present invention. Here, the power supply device supplies power to a plurality of loads using three high voltage transformers and three switching transistors provided on the primary side of each of them. Illustrated. In the figure, the symbol 'I'1 indicates a high voltage transformer, and the two secondary windings of this high voltage transformer TI have diodes D.
, , D2, and load resistors R, , R2 are connected through rectifying and smoothing circuits formed from capacitors C, , C2, respectively.

高圧トランスT1の1次巻線の一端には抵抗R0を介し
て低圧の電源電圧VCCが印加され、その他端にはエミ
ッタを接地されたトランジスタTf1のコレクタおよび
ダイオードD6のカソード、コンデンサC6およびRl
oの直列接続が接続されている。
A low power supply voltage VCC is applied to one end of the primary winding of the high voltage transformer T1 via a resistor R0, and the other end is connected to the collector of a transistor Tf1 whose emitter is grounded, the cathode of a diode D6, and the capacitor C6 and Rl.
A series connection of o is connected.

このトランジスタTr1のベースには抵抗RI5を介し
て後述する駆動回路が接続される。
A drive circuit, which will be described later, is connected to the base of this transistor Tr1 via a resistor RI5.

以上に示したインバータ回路は公知の構成であるが、以
上に示したのと同様の構成が図中に示されている。すな
わち、高圧トランスT2 + T3まわりの回路がそれ
であるが、それぞれのスイッチングトランジスタ”’+
 + Tr2. Tr3のベースは抵抗R15+ R1
6+ R17をそれぞれ介して並列に、駆動トランスT
、02次側の一端に接続されている。
The inverter circuit shown above has a well-known configuration, and a configuration similar to that shown above is shown in the figure. In other words, the circuit around the high voltage transformer T2 + T3 is that, but each switching transistor "'+
+ Tr2. The base of Tr3 is resistor R15+R1
6+ In parallel via R17, the drive transformer T
, connected to one end of the secondary side.

この、駆動トランスT4の2次巻線の他端は接地されて
おり、1次巻線の一端には抵抗R18を介して直流電源
電圧〜’ccが印加されている。寸だ1次巻線の他端〜
グラ/ド間にはコンテ/すC0、抵抗R2゜の直列接続
、およびトランジスタTr 4のコレフタルエミッタが
接続されている。
The other end of the secondary winding of the drive transformer T4 is grounded, and the DC power supply voltage ~'cc is applied to one end of the primary winding via a resistor R18. The other end of the primary winding
Connected between the ground and the ground are a resistor C0, a resistor R2° connected in series, and a coreftal emitter of a transistor Tr4.

以上の、駆動トランスT4周りの回路も実質的にはイン
バータ回路を構成しており、上記のトランジスタTr 
4のベースには抵抗RIG’を介してパルス幅可変発振
器(以下I’WMという)1の出力が導ひかれる。
The above-mentioned circuit around the drive transformer T4 also substantially constitutes an inverter circuit, and the above-mentioned transistor Tr
The output of a variable pulse width oscillator (hereinafter referred to as I'WM) 1 is led to the base of 4 via a resistor RIG'.

とのr’tvM+はコンパレータQ1の出力に応じてト
ランジスタTr4の駆動パルス幅(デユーティ−比)を
変化させることにより、各スイッチングトランジスタT
r1〜Tr、のオン時間を調節し、各高圧トランスTI
−T3の2次側の負荷電流を調整するようになっている
By changing the drive pulse width (duty ratio) of the transistor Tr4 according to the output of the comparator Q1, r'tvM+ of each switching transistor T
By adjusting the on-time of r1 to Tr, each high voltage transformer TI
- The load current on the secondary side of T3 is adjusted.

コンパレータQ1の一方の入力には、高圧トランスT、
の2次巻線の負荷電流を検出するだめの検出抵抗R6お
よび塗出電圧の平滑用コンデンサC5の両端屯田が抵抗
R,を介して、また直流電源電圧■ccが抵抗R8を介
して入力され、もう一方の入力には基I電圧Aが接続さ
れている。
One input of the comparator Q1 has a high voltage transformer T,
The detection resistor R6, which detects the load current of the secondary winding of , the other input is connected to the base I voltage A.

以上のようにインバータ回路を構成すると、PWM 1
によりl・ランジスタTr 4を駆動し、さらにトラン
スT、を介して各スイッチングトランジスタTPr1〜
Trr3を1駆動し、それぞれの2次側に任意の巻線比
に従って昇圧された電圧を取り出すことができる。負荷
電流は高圧トランスT、の2次側のものが検出抵抗R6
を介してコノパレータQ、に入力され、その比較出力に
応じてpv1□1が制御されるので、負荷の変動に応じ
て各高圧トランス2次側の負荷電流が調整される。
When the inverter circuit is configured as described above, PWM 1
drives the L transistor Tr4, and further drives the switching transistors TPr1 to TPr1 through the transformer T.
By driving Trr3 by 1, it is possible to take out a voltage boosted according to an arbitrary winding ratio to each secondary side. The load current is detected by the detection resistor R6 on the secondary side of the high voltage transformer T.
, and pv1□1 is controlled according to the comparison output thereof, so that the load current on the secondary side of each high-voltage transformer is adjusted according to load fluctuations.

以との実施例では高圧トランス3組を駆動する構成を例
示したが、高圧トランスに限らす昇圧を行なわないイン
バータによる電源装置にも本発明酪 は応用でき、またそのトランスの数は3個に割部されな
い。
In the embodiments described above, a configuration was illustrated in which three sets of high-voltage transformers are driven, but the present invention can be applied not only to high-voltage transformers but also to power supplies using inverters that do not step up the voltage, and the number of transformers can be increased to three. Not divided.

効果 以−にの説明から明らかなようQこ、本発明は1個の駆
動手段により複数のスイッチツクトランジスタおよびイ
ンバータトラノスを駆動する構成を採用しているので、
回路構成を簡略化し、部品点数を減少し、実装スペース
を削減し、製造コストを下げ、回路の信頼性を向上させ
る、等の優れた効果がある。
Effects As is clear from the explanation below, the present invention employs a configuration in which a plurality of switching transistors and inverter transistors are driven by one driving means.
It has excellent effects such as simplifying the circuit configuration, reducing the number of parts, reducing mounting space, lowering manufacturing costs, and improving circuit reliability.

【図面の簡単な説明】[Brief explanation of the drawing]

図は本発明の電源装置の一実施例を示す回路図である。 l・・・P WM     Rl〜Rm・・・抵抗C1
〜C9・・・コンデンサ T1〜T3・・・高圧トランス T4・・・駆動トランス DI〜D8甲ダイオードTr
1〜Tr4・・・トランジスタ
The figure is a circuit diagram showing an embodiment of the power supply device of the present invention. l...P WM Rl~Rm...Resistance C1
~C9...Capacitor T1~T3...High voltage transformer T4...Drive transformer DI~D8 A diode Tr
1 to Tr4...transistor

Claims (1)

【特許請求の範囲】[Claims] インバータトランスの1次側をスイッチングトランジス
タにより断続することにより2次側に出力を取り出す電
源装置において、前記スイッチングトランジスタを駆動
する1つの駆動手段により複数のスイッチングトランジ
スタおよびインバータトランスを制(財)することを特
徴とする電源装置。
In a power supply device that outputs an output to a secondary side by switching on and off the primary side of an inverter transformer using a switching transistor, a plurality of switching transistors and an inverter transformer are controlled by one driving means for driving the switching transistor. A power supply device featuring:
JP58048992A 1983-03-25 1983-03-25 Power source Pending JPS59175377A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58048992A JPS59175377A (en) 1983-03-25 1983-03-25 Power source

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58048992A JPS59175377A (en) 1983-03-25 1983-03-25 Power source

Publications (1)

Publication Number Publication Date
JPS59175377A true JPS59175377A (en) 1984-10-04

Family

ID=12818711

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58048992A Pending JPS59175377A (en) 1983-03-25 1983-03-25 Power source

Country Status (1)

Country Link
JP (1) JPS59175377A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0319141A (en) * 1989-06-15 1991-01-28 Sanyo Electric Co Ltd Driving voltage generation circuit
US5005112A (en) * 1989-01-26 1991-04-02 Mitsubishi Jukogyo Kabushiki Kaisha Regulated D.C.-D.C. power converter having multiple D.C. outputs

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5005112A (en) * 1989-01-26 1991-04-02 Mitsubishi Jukogyo Kabushiki Kaisha Regulated D.C.-D.C. power converter having multiple D.C. outputs
JPH0319141A (en) * 1989-06-15 1991-01-28 Sanyo Electric Co Ltd Driving voltage generation circuit

Similar Documents

Publication Publication Date Title
US5583753A (en) Parallel control type DC--DC converter
JPH0654528A (en) Drive circuit for power switch of zero- volt switching power converter
US7414869B2 (en) Switching power supply unit
CN101325372B (en) Synchronous rectifier circuit and multi-output power supply device using the same
JP2004536543A (en) Isolated drive circuit used in switch mode power converter
US5216585A (en) Switching power source device
US4408267A (en) DC-to-DC Switching converters
JP3480438B2 (en) Multi-output switching power supply
JPH04299070A (en) Switching regulator
US8279629B2 (en) Switching power supply
JP3080128B2 (en) Resonant DC-DC converter
JPH05304772A (en) Power supply circuit
JPS59175377A (en) Power source
US6717826B2 (en) Method to reduce bus voltage stress in a single-stage single switch power factor correction circuit
JP3367539B2 (en) DC power supply
JPH07135769A (en) Dc resonance converter
JP2603646B2 (en) converter
KR100359709B1 (en) Switching mode power supply
JP4210804B2 (en) Synchronous rectification type DC-DC converter
JP2551190B2 (en) Switching power supply circuit
JPH0258861B2 (en)
US6081435A (en) Cross-conduction limiting circuit, method of operation thereof and DC/DC converter employing the same
JP2605664Y2 (en) Push-pull DC-DC converter
JPH08331843A (en) Output voltage detecting circuit in switching power supply
JPH0654525A (en) Dc/dc converter