JPS6235348B2 - - Google Patents
Info
- Publication number
- JPS6235348B2 JPS6235348B2 JP56029516A JP2951681A JPS6235348B2 JP S6235348 B2 JPS6235348 B2 JP S6235348B2 JP 56029516 A JP56029516 A JP 56029516A JP 2951681 A JP2951681 A JP 2951681A JP S6235348 B2 JPS6235348 B2 JP S6235348B2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- control circuit
- switching element
- smoothing
- power supply
- 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
- 238000001514 detection method Methods 0.000 claims description 12
- 238000004804 winding Methods 0.000 claims description 12
- 238000009499 grossing Methods 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Electrical Variables (AREA)
- Dc-Dc Converters (AREA)
- Power Conversion In General (AREA)
Description
【発明の詳細な説明】
本発明は、直流回路に直列に接続したスイツチ
ング素子のオン・オフのデユーテイ比を調整する
ことにより出力電圧を制御するチヨツパ形電源回
路に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chopper type power supply circuit that controls an output voltage by adjusting the on/off duty ratio of a switching element connected in series with a DC circuit.
第１図は、このような電源回路の従来例を示
す。交流電源１、整流回路２および平滑コンデン
サ３から構成された直流回路に直列に、スイツチ
ング素子であるスイツチングトランジスタ４が接
続されている。５は出力電流を平滑化するための
リアクトルで、平均化された電流を負荷６に供給
する。７はフライホイールダイオードである。 FIG. 1 shows a conventional example of such a power supply circuit. A switching transistor 4, which is a switching element, is connected in series to a DC circuit composed of an AC power supply 1, a rectifier circuit 2, and a smoothing capacitor 3. 5 is a reactor for smoothing the output current, and supplies the averaged current to the load 6. 7 is a flywheel diode.
負荷６の印加電圧は、抵抗８，９からなる分圧
器を用いて検出され、トランジスタ４を制御する
制御回路１０に検出入力として加えられる。この
入力と制御入力１１とが制御回路１０において比
較され、負荷６の印加電圧が一定となるようトラ
ンジスタ４のオン・オフのデユーテイ比が制御さ
れる。 The voltage applied to the load 6 is detected using a voltage divider consisting of resistors 8 and 9 and is applied as a detection input to a control circuit 10 that controls the transistor 4. This input and the control input 11 are compared in the control circuit 10, and the on/off duty ratio of the transistor 4 is controlled so that the voltage applied to the load 6 is constant.
上記の回路は、分圧器を用いて制御回路の検出
入力を得ているため、制御回路を交流電源から絶
縁できず、安全上の問題点を持つている。例えば
ホトカプラを用いることにより、交流電源から絶
縁した状態で制御回路の検出入力を得ることも不
可能ではないが、そうすると部品点数が増加し、
大幅なコストアツプとなつてしまう。 Since the above circuit uses a voltage divider to obtain the detection input of the control circuit, the control circuit cannot be isolated from the AC power supply, which poses a safety problem. For example, it is possible to use a photocoupler to obtain detection input for the control circuit while insulating it from the AC power supply, but doing so would increase the number of components.
This will result in a significant increase in costs.
本発明は、最少の費用で制御回路を交流電源か
ら絶縁することを目的としたもので、出力電流の
平滑化のためにリアクトルが設けられていること
に着目し、ここに負荷電流のための主巻線に加え
て電圧検出巻線を設け、その誘起電圧を制御回路
に検出入力として加えるとともに、制御回路の出
力をパルストランスを介してスイツチング素子に
加えることを特徴とする。 The present invention aims to insulate a control circuit from an AC power supply at minimum cost, and focuses on the fact that a reactor is provided for smoothing the output current. A voltage detection winding is provided in addition to the main winding, and the induced voltage is applied to the control circuit as a detection input, and the output of the control circuit is applied to the switching element via a pulse transformer.
第２図は本発明の一実施例を示す。平滑リアク
トル１５は、主巻線１６に加えて電圧検出巻線１
７を有する。トランジスタ４がオフの際に巻線１
７に誘起される、負荷６の印加電圧と比例した電
圧は、ダイオード１８で整流され、コンデンサ１
９で平滑化されて、制御回路１０に検出入力とし
て加えられる。トランジスタ４の制御信号は、パ
ルストランス２０を介してトランジスタ４に供給
される。２１は制御回路電源である。 FIG. 2 shows an embodiment of the invention. The smoothing reactor 15 includes a voltage detection winding 1 in addition to the main winding 16.
It has 7. Winding 1 when transistor 4 is off
A voltage proportional to the voltage applied to the load 6, which is induced in the capacitor 1, is rectified by the diode 18.
The signal is smoothed at step 9 and applied to the control circuit 10 as a detection input. A control signal for transistor 4 is supplied to transistor 4 via pulse transformer 20 . 21 is a control circuit power supply.
負荷６に加わる電圧が変動すると、巻線１７の
誘起電圧、従つて制御回路１０の検出入力が変動
する。これに伴い、制御回路１０は、負荷電圧が
所定値となるようトランジスタ４のオン・オフの
デユーテイ比を調整する。 When the voltage applied to the load 6 fluctuates, the induced voltage in the winding 17 and therefore the detection input of the control circuit 10 fluctuates. Accordingly, the control circuit 10 adjusts the on/off duty ratio of the transistor 4 so that the load voltage becomes a predetermined value.
以上説明したように、本発明によれば、この種
回路が本来備えている平滑リアクトルを巧みに利
用することにより、最少の付加費用をもつて制御
回路を交流電源から絶縁することが可能である。 As explained above, according to the present invention, by skillfully utilizing the smoothing reactor that this type of circuit inherently has, it is possible to insulate the control circuit from the AC power source with minimal additional cost. .
第１図は従来のチヨツパ形電源回路の接続図、
第２図は本発明一実施例の接続図である。
１…交流電源、２…整流回路、３…平滑コンデ
ンサ、４…スイツチングトランジスタ、６…負
荷、７…フライホイールダイオード、１０…制御
回路、１５…平滑リアクトル、１６…主巻線、１
７…電圧検出巻線、２０…パルストランス。
Figure 1 is a connection diagram of a conventional chipper type power supply circuit.
FIG. 2 is a connection diagram of one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... AC power supply, 2... Rectifier circuit, 3... Smoothing capacitor, 4... Switching transistor, 6... Load, 7... Flywheel diode, 10... Control circuit, 15... Smoothing reactor, 16... Main winding, 1
7... Voltage detection winding, 20... Pulse transformer.
Claims (1)
子と、前記スイツチング素子のオン・オフを制御
する制御回路と、出力電流を平滑化するための平
滑リアクトルを有する回路において、前記平滑リ
アクトルは負荷電流平滑のための主巻線に加えて
電圧検出巻線を有し、前記主巻線による前記電圧
検出巻線への誘起電圧が前記制御回路に検出入力
として加えられ、前記制御回路の出力がパルスト
ランスを介してスイツチング素子に加えられ、前
記制御回路を動作させる制御電源が前記直流回路
と別系に設けられ、前記制御回路が前記直流回路
と絶縁して設けられることを特徴とするチヨツパ
形電源回路。1. In a circuit having a switching element connected in series to a DC circuit, a control circuit for controlling on/off of the switching element, and a smoothing reactor for smoothing the output current, the smoothing reactor is used for smoothing the load current. has a voltage detection winding in addition to a main winding, and the voltage induced in the voltage detection winding by the main winding is applied to the control circuit as a detection input, and the output of the control circuit is applied to the pulse transformer. A chopper type power supply circuit characterized in that a control power supply that is applied to a switching element via a switching element and operates the control circuit is provided in a separate system from the DC circuit, and the control circuit is provided insulated from the DC circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2951681A JPS57143620A (en) | 1981-03-02 | 1981-03-02 | Chopper type power source circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2951681A JPS57143620A (en) | 1981-03-02 | 1981-03-02 | Chopper type power source circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57143620A JPS57143620A (en) | 1982-09-04 |
| JPS6235348B2 true JPS6235348B2 (en) | 1987-07-31 |
Family
ID=12278256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2951681A Granted JPS57143620A (en) | 1981-03-02 | 1981-03-02 | Chopper type power source circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57143620A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6066663A (en) * | 1983-09-22 | 1985-04-16 | Fanuc Ltd | Insulating drive power source for inverter circuit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5235969A (en) * | 1975-09-16 | 1977-03-18 | Origin Electric Co Ltd | Switching circuit |
-
1981
- 1981-03-02 JP JP2951681A patent/JPS57143620A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5235969A (en) * | 1975-09-16 | 1977-03-18 | Origin Electric Co Ltd | Switching circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57143620A (en) | 1982-09-04 |
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