JPH0965653A - Dc-dc converter - Google Patents
Dc-dc converterInfo
- Publication number
- JPH0965653A JPH0965653A JP7214897A JP21489795A JPH0965653A JP H0965653 A JPH0965653 A JP H0965653A JP 7214897 A JP7214897 A JP 7214897A JP 21489795 A JP21489795 A JP 21489795A JP H0965653 A JPH0965653 A JP H0965653A
- Authority
- JP
- Japan
- Prior art keywords
- diode
- capacitor
- winding
- switching element
- connection point
- 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
Links
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
- H02M3/285—Single converters with a plurality of output stages connected in parallel
-
- 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
-
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ＤＣ−ＤＣコンバ
ータに関する。TECHNICAL FIELD The present invention relates to a DC-DC converter.
【０００２】[0002]
【従来の技術】図５は、従来のＤＣ−ＤＣコンバータを
示す。電源５１に一端が接続された１次巻線５２の他端
にスイッチング素子５３が接続され、１次巻線５３に対
し２つの２次巻線５４ａ、５４ｂが磁気結合している。
また、２次巻線５４ａの出力側にダイオード５５ａのア
ノードを、２次巻線５４ｂの出力側にダイオード５５ｂ
のカソードをそれぞれ接続し、ダイオード５５ａのカソ
ードとスイッチング素子５３のベースの間に制御回路５
６を接続して帰還回路を形成している。そして、２次巻
線５４ａの出力側からダイオード５５ａを介して正の出
力電圧＋Ｖを、２次巻線５４ｂの出力側からダイオード
５５ｂを介して負の出力電圧−Ｖを取り出している。2. Description of the Related Art FIG. 5 shows a conventional DC-DC converter. The switching element 53 is connected to the other end of the primary winding 52, one end of which is connected to the power supply 51, and the two secondary windings 54 a and 54 b are magnetically coupled to the primary winding 53.
The anode of the diode 55a is connected to the output side of the secondary winding 54a and the diode 55b is connected to the output side of the secondary winding 54b.
Of the control circuit 5 between the cathode of the diode 55a and the base of the switching element 53.
6 is connected to form a feedback circuit. Then, a positive output voltage + V is taken out from the output side of the secondary winding 54a via the diode 55a, and a negative output voltage -V is taken out from the output side of the secondary winding 54b via the diode 55b.
【０００３】一般に、電子機器には±５Ｖや±１２Ｖの
正負対称電圧が必要であるが、従来のＤＣ−ＤＣコンバ
ータでは、図５に示すように、複数の２次巻線を用いる
ことにより、正負対称電圧を取り出していた。Generally, electronic devices require positive and negative symmetrical voltages of ± 5 V and ± 12 V, but a conventional DC-DC converter uses a plurality of secondary windings as shown in FIG. The positive / negative symmetrical voltage was taken out.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、従来の
ＤＣ−ＤＣコンバータでは、１つの制御回路５６を用い
た出力電圧制御は、１つの出力電圧しか制御できないた
め、例えば、正の出力電圧を制御すると、正の出力電圧
用２次巻線と負の出力電圧用２次巻線の磁気結合度が１
００％であれば、制御されていない負の出力電圧の絶対
値も正の出力電圧と等しくなる。しかし、現実には多巻
線間結合度を１００％にすることは不可能なため、正負
の出力電圧の絶対値に差が生じ、正負の出力電圧を確実
に制御することは不可能であるという問題点があった。However, in the conventional DC-DC converter, since the output voltage control using one control circuit 56 can control only one output voltage, for example, when a positive output voltage is controlled. , The degree of magnetic coupling between the secondary winding for positive output voltage and the secondary winding for negative output voltage is 1
If it is 00%, the absolute value of the uncontrolled negative output voltage is also equal to the positive output voltage. However, in reality, it is impossible to set the degree of coupling between multiple windings to 100%, so that a difference occurs in the absolute value of the positive and negative output voltages, and it is impossible to reliably control the positive and negative output voltages. There was a problem.
【０００５】また、１、２次巻線間の磁気結合度が１０
０％にならないので電力変換効率が低下するという問題
点があった。The degree of magnetic coupling between the primary and secondary windings is 10
Since it does not reach 0%, there is a problem that the power conversion efficiency decreases.
【０００６】さらに、正負２つの出力電圧を取り出すに
は、１次巻線、正負の２次巻線の少なくとも３巻線を有
するトランスが必要になり、コストが高くなるという問
題点があった。Further, in order to take out two positive and negative output voltages, a transformer having at least three windings of a primary winding and a positive and negative secondary winding is required, which causes a problem of high cost.
【０００７】本発明は、このような問題点を解消するた
めになされたものであり、正負の出力電圧を確実に制御
できる低コストのＤＣ−ＤＣコンバータを提供すること
を目的とする。The present invention has been made to solve such problems, and an object thereof is to provide a low-cost DC-DC converter capable of reliably controlling positive and negative output voltages.
【０００８】[0008]
【課題を解決するための手段】上述の問題点を解決する
ため本発明は、電源と、該電源に一端が接続された１次
巻線と、該１次巻線の他端に接続されたスイッチング素
子と、前記１次巻線と磁気結合している２次巻線と、前
記２次巻線の出力側と基準電位との間に接続された第１
のコンデンサ及び第１のダイオードからなる直列回路
と、前記第１のコンデンサと前記第１のダイオードの接
続点と基準電位との間に接続された第２のダイオード
と、前記２次巻線の出力側と第１のコンデンサの接続点
と基準電位との間に接続された第２のコンデンサ及び第
３のダイオードからなる直列回路と、前記第２のコンデ
ンサと前記第３のダイオードの接続点と基準電位との間
に接続された第４のダイオードとを備え、前記第１のダ
イオードのアノードが前記第１のコンデンサに接続さ
れ、前記第２のダイオードのアノードが基準電位に接続
され、前記第３のダイオードのカソードが前記第２のコ
ンデンサに接続され、前記第４のダイオードのカソード
が基準電位に接続されていることを特徴とする。In order to solve the above-mentioned problems, the present invention has a power supply, a primary winding having one end connected to the power supply, and a second winding connected to the other end of the primary winding. A switching element, a secondary winding magnetically coupled to the primary winding, and a first connection connected between an output side of the secondary winding and a reference potential.
Series circuit composed of the first capacitor and a first diode, a second diode connected between a connection point of the first capacitor and the first diode and a reference potential, and an output of the secondary winding. Side and a connection point between the first capacitor and a reference potential, a series circuit including a second capacitor and a third diode, a connection point between the second capacitor and the third diode, and a reference A fourth diode connected between the third diode and a potential, the anode of the first diode being connected to the first capacitor, the anode of the second diode being connected to a reference potential, and the third diode The cathode of the diode is connected to the second capacitor, and the cathode of the fourth diode is connected to the reference potential.
【０００９】また、電源と、該電源に一端が接続された
スイッチング素子と、前記スイッチング素子の他端と基
準電位との間に接続された巻線と、前記スイッチング素
子と前記巻線の接続点と基準電位との間に接続された第
１のコンデンサ及び第１のダイオードからなる直列回路
と、前記第１のコンデンサと前記第１のダイオードの接
続点と基準電位との間に接続された第２のダイオード
と、前記スイッチング素子と前記第１のコンデンサの接
続点と基準電位との間に接続された第２のコンデンサ及
び第３のダイオードからなる直列回路と、前記第２のコ
ンデンサと前記第３のダイオードの接続点と基準電位と
の間に接続された第４のダイオードとを備え、前記第１
のダイオードのアノードが前記第１のコンデンサに接続
され、前記第２のダイオードのカソードが基準電位に接
続され、前記第３のダイオードのカソードが前記第２の
コンデンサに接続され、前記第４のダイオードのカソー
ドが基準電位に接続されていることを特徴とする。Further, a power supply, a switching element having one end connected to the power supply, a winding connected between the other end of the switching element and a reference potential, and a connection point between the switching element and the winding. And a reference potential, a series circuit including a first capacitor and a first diode, and a first capacitor connected between a connection point of the first capacitor and the first diode and the reference potential. A second diode, a series circuit including a second capacitor and a third diode connected between a connection point of the switching element and the first capacitor and a reference potential, the second capacitor and the second capacitor. And a fourth diode connected between the connection point of the third diode and the reference potential,
An anode of the diode is connected to the first capacitor, a cathode of the second diode is connected to a reference potential, a cathode of the third diode is connected to the second capacitor, and a fourth diode The cathode of is connected to a reference potential.
【００１０】また、電源と、該電源に一端が接続された
巻線と、該巻線の他端に接続されたスイッチング素子
と、前記巻線と前記スイッチング素子の接続点と基準電
位との間に接続された第１のダイオードと、前記巻線と
前記第１のダイオードの接続点と基準電位との間に接続
された第１のコンデンサ及び第２のダイオードからなる
直列回路と、前記第１のコンデンサと前記第２のダイオ
ードの接続点と基準電位との間に接続された第３のダイ
オードとを備え、前記第１のダイオードのアノードが前
記巻線と前記スイッチング素子の接続点に接続され、前
記第２のダイオードのカソードが前記コンデンサに接続
され、前記第３のダイオードのカソードが基準電位に接
続されていることを特徴とする。Further, between the power source, the winding having one end connected to the power source, the switching element connected to the other end of the winding, the connection point between the winding and the switching element, and the reference potential. A first diode connected to the first winding, a series circuit including a first capacitor and a second diode connected between a connection point of the winding and the first diode, and a reference potential; Capacitor and a third diode connected between the connection point of the second diode and the reference potential, the anode of the first diode being connected to the connection point of the winding and the switching element. The cathode of the second diode is connected to the capacitor, and the cathode of the third diode is connected to the reference potential.
【００１１】これにより、請求項１のＤＣ−ＤＣコンバ
ータでは、正の出力電圧は、第１のコンデンサと第１及
び第２のダイオードを介して取り出され、負の出力電圧
は、第２のコンデンサと第３及び第４のダイオードを介
して取り出される。As a result, in the DC-DC converter according to the first aspect, the positive output voltage is taken out through the first capacitor and the first and second diodes, and the negative output voltage is taken as the second capacitor. And through the third and fourth diodes.
【００１２】請求項２のＤＣ−ＤＣコンバータでは、正
の出力電圧は、第１のコンデンサと第１及び第２のダイ
オードを介して取り出され、負の出力電圧は、第２のコ
ンデンサと第３及び第４のダイオードを介して取り出さ
れる。According to another aspect of the DC-DC converter of the present invention, the positive output voltage is taken out via the first capacitor and the first and second diodes, and the negative output voltage is taken from the second capacitor and the third capacitor. And via the fourth diode.
【００１３】請求項３のＤＣ−ＤＣコンバータでは、正
の出力電圧は、第１のダイオードのみを介して取り出さ
れ、負の出力電圧は、コンデンサと第２のダイオードを
介して取り出される。In the DC-DC converter of the third aspect, the positive output voltage is taken out only through the first diode, and the negative output voltage is taken out through the capacitor and the second diode.
【００１４】[0014]
【発明の実施の形態】以下、図面を参照して本発明の実
施例を説明する。図１に本発明に係るＤＣ−ＤＣコンバ
ータの第１の実施例の回路図を示す。この回路では、電
源１０に一端が接続された１次巻線１１の他端にスイッ
チング素子（バイポーラトランジスタ）１２が接続され
ており、１次巻線１１と磁気結合している２次巻線１３
の出力側と基準電位、すなわち接地電位１６との間に
は、第１のダイオード１４ａと第１のコンデンサ１５ａ
の直列回路が接続され、第１のダイオード１４ａと第１
のコンデンサ１５ａの接続点Ａと接地電位１６との間に
は、それぞれ第２のダイオード１４ｂが接続されてい
る。この際、第１のダイオード１４ａのアノードは第１
のコンデンサ１５ａに接続され、第２のダイオード１４
ｂのアノードは接地電位１６に接続されている。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a circuit diagram of a first embodiment of a DC-DC converter according to the present invention. In this circuit, a switching element (bipolar transistor) 12 is connected to the other end of a primary winding 11 whose one end is connected to a power supply 10, and a secondary winding 13 magnetically coupled to the primary winding 11.
The first diode 14a and the first capacitor 15a are provided between the output side of the device and the reference potential, that is, the ground potential 16.
Connected in series with the first diode 14a and the first diode 14a.
The second diode 14b is connected between the connection point A of the capacitor 15a and the ground potential 16. At this time, the anode of the first diode 14a is the first
Connected to the capacitor 15a of the second diode 14
The anode of b is connected to the ground potential 16.
【００１５】また、２次巻線１３の出力側と第１のコン
デンサ１５ａの接続点と接地電位１６との間には、第３
のダイオード１４ｃと第２のコンデンサ１５ｂの直列回
路が接続され、第３のダイオード１４ｃと第２のコンデ
ンサ１５ｂの接続点Ｂと接地電位１６との間には、第４
のダイオード１４ｄが接続されている。この際、第３の
ダイオード１４ｃのカソードは第２のコンデンサ１５ｂ
に接続され、第４のダイオード１４ｄのカソードは接地
電位１６に接続されている。Further, between the connection side of the output side of the secondary winding 13 and the first capacitor 15a and the ground potential 16, there is a third
Connected in series with the diode 14c and the second capacitor 15b, and between the connection point B of the third diode 14c and the second capacitor 15b and the ground potential 16 is
The diode 14d of is connected. At this time, the cathode of the third diode 14c is the second capacitor 15b.
And the cathode of the fourth diode 14d is connected to the ground potential 16.
【００１６】さらに、第１のダイオード１４ａのカソー
ドとスイッチング素子１２のベースの間に制御回路１７
を接続して帰還回路を形成している。Further, a control circuit 17 is provided between the cathode of the first diode 14a and the base of the switching element 12.
To form a feedback circuit.
【００１７】そして、正の出力電圧＋Ｖは、２次巻線１
３の出力側から第１のコンデンサ１５ａ、第１及び第２
のダイオード１４ａ、１４ｂを介して取り出され、負の
出力電圧−Ｖは、２次巻線１３の出力側から第２のコン
デンサ１５ｂ、第３及び第４のダイオード１４ｃ、１４
ｄを介して取り出される。The positive output voltage + V is applied to the secondary winding 1
From the output side of the first capacitor 15a, first and second
The negative output voltage −V is taken out from the output side of the secondary winding 13 by the second capacitor 15b, the third and fourth diodes 14c, 14b.
It is taken out via d.
【００１８】図４を用いて、時間に対する各発生電圧の
動作を説明する。ここで、各接続点に発生する電圧を発
生電圧とする。The operation of each generated voltage with respect to time will be described with reference to FIG. Here, the voltage generated at each connection point is the generated voltage.
【００１９】まず、第１のダイオード１４ａのアノード
と第１のコンデンサ１５ａの接続点Ａの発生電圧をＶａ
とし、第３のダイオード１４ｃのカソードと第２のコン
デンサ１５ｂの接続点Ｂの発生電圧をＶｂとする。First, the voltage generated at the connection point A between the anode of the first diode 14a and the first capacitor 15a is Va.
The voltage generated at the connection point B between the cathode of the third diode 14c and the second capacitor 15b is Vb.
【００２０】各接続点における発生電圧の動作波形を図
４に示す。図４において、横軸は時間ｔ、縦軸はそれぞ
れ、スイッチング素子１２のベース電圧Ｖｓ、２次巻線
１３に発生する電圧Ｖｄ、接続点Ａの発生電圧Ｖａ、接
続点Ｂの発生電圧Ｖｂである。The operation waveforms of the generated voltage at each connection point are shown in FIG. 4, the horizontal axis represents time t, and the vertical axis represents the base voltage Vs of the switching element 12, the voltage Vd generated in the secondary winding 13, the generated voltage Va at the connection point A, and the generated voltage Vb at the connection point B, respectively. is there.
【００２１】まず、ｔが０のとき（始動前）は、各電圧
Ｖｓ、Ｖｄ、Ｖａ、Ｖｂはそれぞれ０である。First, when t is 0 (before starting), the voltages Vs, Vd, Va and Vb are 0, respectively.
【００２２】次いで、スイッチング素子１２のベース電
圧にＶｓが印加され、スイッチング素子１２が”ＯＮ”
になる（図中１の領域）と、２次巻線１３に電圧−Ｖ２
が発生するため、接続点Ａの発生電圧Ｖａは第２のダイ
オード１４ｂが導通するので０となる。一方、接続点Ｂ
の発生電圧Ｖｂは第３のダイオード１４ｃが導通するの
で−Ｖ２となる。以上を動作１とする。Next, Vs is applied to the base voltage of the switching element 12, and the switching element 12 turns "ON".
(Area 1 in the figure), the voltage −V2 is applied to the secondary winding 13.
Occurs, the voltage Va generated at the connection point A becomes 0 because the second diode 14b becomes conductive. On the other hand, connection point B
The generated voltage Vb of-becomes -V2 because the third diode 14c becomes conductive. The above is operation 1.
【００２３】次いで、スイッチング素子１２のベース電
圧に−Ｖｓが印加され、スイッチング素子１２が”ＯＦ
Ｆ”になる（図中２の領域）と、２次巻線１３に電圧＋
Ｖ１が発生するため、接続点Ａの発生電圧Ｖａは第１の
ダイオード１４ａが導通するので＋Ｖ１となる。一方、
接続点Ｂの発生電圧Ｖｂは第４のダイオード１４ｄが導
通するので０となる。以上を動作２とする。Next, -Vs is applied to the base voltage of the switching element 12, so that the switching element 12 becomes "OF".
When it becomes F ″ (area 2 in the figure), voltage + is applied to the secondary winding 13.
Since V1 is generated, the generated voltage Va at the connection point A is + V1 because the first diode 14a is conductive. on the other hand,
The voltage Vb generated at the connection point B becomes 0 because the fourth diode 14d is turned on. The above is operation 2.
【００２４】次いで、スイッチング素子１２のベース電
圧に＋Ｖｓが印加され、スイッチング素子１２が”Ｏ
Ｎ”になる（図中３の領域）と、２次巻線１３に電圧−
Ｖ２が発生するため、接続点Ａの発生電圧Ｖａは第２の
ダイオード１４ｂが導通するので０となる。一方、接続
点Ｂの発生電圧Ｖｂは第３のダイオード１ｃｂが導通す
るので−Ｖ１と−Ｖ２の和である−Ｖとなる。以上を動
作３とする。Next, + Vs is applied to the base voltage of the switching element 12 so that the switching element 12 has "O".
When it becomes N ″ (region 3 in the figure), voltage is applied to the secondary winding 13.
Since V2 is generated, the voltage Va generated at the connection point A becomes 0 because the second diode 14b becomes conductive. On the other hand, the voltage Vb generated at the connection point B becomes -V, which is the sum of -V1 and -V2, because the third diode 1cb conducts. The above is operation 3.
【００２５】次いで、スイッチング素子１２のベース電
圧に−Ｖｓが印加され、スイッチング素子１２が”ＯＦ
Ｆ”になる（図中４の領域）と、２次巻線１３に電圧＋
Ｖ１が発生するため、接続点Ａの発生電圧Ｖａは第１の
ダイオード１４ａが導通するのでＶ１とＶ２の和である
Ｖとなる。一方、接続点Ｂの発生電圧Ｖｂは第４のダイ
オード１４ｄが導通するので０となる。以上を動作４と
する。Then, -Vs is applied to the base voltage of the switching element 12, so that the switching element 12 becomes "OF".
When it becomes F ″ (region 4 in the figure), voltage + is applied to the secondary winding 13.
Since V1 is generated, the voltage Va generated at the connection point A becomes V, which is the sum of V1 and V2, because the first diode 14a is conductive. On the other hand, the voltage Vb generated at the connection point B becomes 0 because the fourth diode 14d is turned on. The above is operation 4.
【００２６】その後、動作３と動作４が順次繰り返さ
れ、その結果、２次巻線１３の出力側から第１のコンデ
ンサ１５ａ、第１及び第２のダイオード１４ａ、１４ｂ
を介して正の出力電圧＋Ｖ、２次巻線１３の出力側から
第２のコンデンサ１５ｂ、第３及び第４のダイオード１
４ｃ、１４ｄを介して負の出力電圧−Ｖが取り出され
る。After that, the operations 3 and 4 are sequentially repeated, and as a result, the first capacitor 15a and the first and second diodes 14a and 14b are output from the output side of the secondary winding 13.
From the output side of the secondary winding 13 to the positive output voltage + V via the second capacitor 15b, the third and the fourth diode 1
The negative output voltage -V is taken out via 4c and 14d.
【００２７】上記のように、第１の実施例のＤＣ−ＤＣ
コンバータによれば、絶対値の等しい正負の出力電圧を
取り出すのに１つの２次巻線しか用いていないため、一
方の出力電圧（例えば、正の出力電圧）を制御すれば、
他方の出力電圧（例えば、負の出力電圧）も同時に制御
することができ、従来のＤＣ−ＤＣコンバータに比べ、
負荷電流変動時の出力電圧値の変動が小さくなる。As described above, the DC-DC of the first embodiment
According to the converter, since only one secondary winding is used to extract positive and negative output voltages having the same absolute value, if one output voltage (for example, positive output voltage) is controlled,
The other output voltage (for example, a negative output voltage) can be controlled at the same time, and compared with the conventional DC-DC converter,
The fluctuation of the output voltage value when the load current changes becomes small.
【００２８】また、１つの１次巻線及び１つの２次巻線
の２巻線を有するトランスで、正負２つの出力電圧を取
り出すことが可能になり、トランスの巻線数を減らすこ
とができるため、低コスト化が可能になる。In addition, a transformer having two windings, one primary winding and one secondary winding, can output two positive and negative output voltages, and the number of windings of the transformer can be reduced. Therefore, the cost can be reduced.
【００２９】図２に本発明に係るＤＣ−ＤＣコンバータ
の第２の実施例の回路図を示す。この回路では、電源１
０とスイッチング素子１２の一端が接続されており、ス
イッチング素子１２の他端と接地電位１６との間には巻
線２１が接続されている。FIG. 2 shows a circuit diagram of a second embodiment of the DC-DC converter according to the present invention. In this circuit,
0 and one end of the switching element 12 are connected, and the winding 21 is connected between the other end of the switching element 12 and the ground potential 16.
【００３０】また、スイッチング素子１２の他端と巻線
２１の接続点と接地電位１６との間には第１のダイオー
ド２２ａと第１のコンデンサ２３ａの直列回路が接続さ
れ、第１のダイオード２２ａと第１のコンデンサ２３ａ
の接続点と接地電位１６との間には、それぞれ第２のダ
イオード２２ｂが接続されている。この際、第１のダイ
オード２２ａのアノードは第１のコンデンサ２３ａに接
続され、第２のダイオード２２ｂのアノードは接地電位
１６に接続されている。Further, a series circuit of a first diode 22a and a first capacitor 23a is connected between the other end of the switching element 12 and the connection point of the winding 21 and the ground potential 16, and the first diode 22a is connected. And the first capacitor 23a
The second diodes 22b are connected between the connection points of the above and the ground potential 16, respectively. At this time, the anode of the first diode 22a is connected to the first capacitor 23a, and the anode of the second diode 22b is connected to the ground potential 16.
【００３１】さらに、スイッチング素子１２の他端と第
１のコンデンサ２３ａの接続点と接地電位１６との間に
は第３のダイオード２２ｃと第２のコンデンサ２３ｂの
直列回路が接続され、第３のダイオード２２ｃと第２の
コンデンサ２３ｂの接続点と接地電位１６との間には、
第４のダイオード２２ｄが接続されている。この際、第
３のダイオード２２ｃのカソードは第２のコンデンサ２
３ｂに接続され、第４のダイオード２２ｄのカソードは
接地電位１６に接続されている。Further, a series circuit of the third diode 22c and the second capacitor 23b is connected between the connection point of the other end of the switching element 12 and the first capacitor 23a and the ground potential 16, and the third diode 22c and the second capacitor 23b are connected in series. Between the connection point of the diode 22c and the second capacitor 23b and the ground potential 16,
The fourth diode 22d is connected. At this time, the cathode of the third diode 22c is the second capacitor 2c.
3b, and the cathode of the fourth diode 22d is connected to the ground potential 16.
【００３２】また、第１のダイオード２２ａのカソード
とスイッチング素子１２のベースの間に制御回路１７を
接続して帰還回路を形成している。A control circuit 17 is connected between the cathode of the first diode 22a and the base of the switching element 12 to form a feedback circuit.
【００３３】そして、正の出力電圧＋Ｖは、スイッチン
グ素子１２の他端から第１のコンデンサ２３ａ、第１及
び第２のダイオード２２ａ、２２ｂを介して取り出さ
れ、負の出力電圧−Ｖは、スイッチング素子１２の他端
から第２のコンデンサ２３ｂ、第３及び第４のダイオー
ド２２ｃ、２２ｄを介して取り出される。The positive output voltage + V is taken out from the other end of the switching element 12 via the first capacitor 23a and the first and second diodes 22a and 22b, and the negative output voltage -V is switched. It is taken out from the other end of the element 12 through the second capacitor 23b and the third and fourth diodes 22c and 22d.
【００３４】上記のように、第２の実施例のＤＣ−ＤＣ
コンバータによれば、第１の実施例と同様の効果に加
え、スイッチング素子１２に接続された巻線２１から直
接正負の出力電圧を取り出すため、トランスを使用した
場合のように、１次巻線、２次巻線間の漏れ磁束による
電力変換効率の低下がなく、高効率化が実現できる。As described above, the DC-DC of the second embodiment
According to the converter, in addition to the effect similar to that of the first embodiment, the positive and negative output voltages are directly taken out from the winding 21 connected to the switching element 12, so that the primary winding is used as in the case of using a transformer. Higher efficiency can be realized without reduction in power conversion efficiency due to leakage flux between the secondary windings.
【００３５】また、トランスを使用しないため、小形化
及び低コスト化が可能になる。Since no transformer is used, it is possible to reduce the size and cost.
【００３６】図３に本発明に係るＤＣ−ＤＣコンバータ
の第３の実施例の回路図を示す。この回路では、電源１
０に一端が接続された巻線３１の他端にスイッチング素
子１２が接続されており、巻線３１の出力側とスイッチ
ング素子１２の一端の接続点と接地電位１６との間には
第１のダイオード３２ａが接続されている。この際、第
１のダイオード３２ａのアノードは巻線３１の他端に接
続されている。FIG. 3 shows a circuit diagram of a third embodiment of the DC-DC converter according to the present invention. In this circuit,
The switching element 12 is connected to the other end of the winding wire 31 whose one end is connected to 0, and the first end is connected between the connection point of the output side of the winding wire 31 and one end of the switching element 12 and the ground potential 16. The diode 32a is connected. At this time, the anode of the first diode 32 a is connected to the other end of the winding 31.
【００３７】また、巻線３１の他端と第１のダイオード
３２ａの接続点と接地電位１６との間には第２のダイオ
ード３２ｂとコンデンサ３３ａの直列回路が接続され、
第２のダイオード３２ｂとコンデンサ３３ａの接続点と
接地電位１６との間には、第３のダイオード３２ｃが接
続されている。この際、第２のダイオード３２ｂのカソ
ードはコンデンサ３３ａに接続され、第３のダイオード
３２ｃのカソードは接地電位１６に接続されている。A series circuit of a second diode 32b and a capacitor 33a is connected between the other end of the winding 31 and the connection point of the first diode 32a and the ground potential 16.
The third diode 32c is connected between the connection point of the second diode 32b and the capacitor 33a and the ground potential 16. At this time, the cathode of the second diode 32b is connected to the capacitor 33a, and the cathode of the third diode 32c is connected to the ground potential 16.
【００３８】さらに、第１のダイオード３２ａのカソー
ドとスイッチング素子１２のベースの間に制御回路１７
を接続して帰還回路を形成している。Further, a control circuit 17 is provided between the cathode of the first diode 32a and the base of the switching element 12.
To form a feedback circuit.
【００３９】そして、正の出力電圧＋Ｖは、巻線３１の
出力側から第１のダイオード３２ａを介して取り出さ
れ、負の出力電圧−Ｖは、巻線３１の出力側からコンデ
ンサ３３ａ、第２及び第３のダイオード３２ｂ、３２ｃ
を介して取り出される。The positive output voltage + V is taken out from the output side of the winding 31 through the first diode 32a, and the negative output voltage -V is taken from the output side of the winding 31 to the capacitor 33a and the second side. And the third diodes 32b, 32c
Is taken out through.
【００４０】上記のように、第３の実施例のＤＣ−ＤＣ
コンバータによれば、第２の実施例と同様の効果に加
え、部品点数が少なくなるため、さらなる小形化及び低
コスト化が実現できる。As described above, the DC-DC of the third embodiment
According to the converter, in addition to the effect similar to that of the second embodiment, the number of parts is reduced, and thus further downsizing and cost reduction can be realized.
【００４１】[0041]
【発明の効果】請求項１のＤＣ−ＤＣコンバータでは、
絶対値の等しい正負の出力電圧を取り出すのに１つの２
次巻線しか用いていないため、一方の出力電圧を制御す
れば、他方の出力電圧も同時に制御することができ、従
来のＤＣ−ＤＣコンバータに比べ、負荷電流変動時の出
力電圧値の変動が小さくなる。According to the DC-DC converter of claim 1,
One 2 for extracting positive and negative output voltages with the same absolute value.
Since only the secondary winding is used, if one output voltage is controlled, the other output voltage can also be controlled at the same time, and the output voltage value varies more when the load current fluctuates than the conventional DC-DC converter. Get smaller.
【００４２】また、１つの１次巻線及び１つの２次巻線
の２巻線を有するトランスで、正負２つの出力電圧を取
り出すことが可能になり、トランスの巻線数を減らすこ
とができるため、低コスト化が可能になる。Further, with a transformer having two windings, one primary winding and one secondary winding, it is possible to extract two positive and negative output voltages, and the number of windings of the transformer can be reduced. Therefore, the cost can be reduced.
【００４３】請求項２のＤＣ−ＤＣコンバータでは、ス
イッチング素子に接続された第１の巻線から直接正負の
出力電圧を取り出すため、トランスを使用した場合のよ
うに、１次巻線、２次巻線間の漏れ磁束による電力変換
効率の低下がなく、高効率化が実現できる。In the DC-DC converter of the second aspect, since the positive and negative output voltages are directly taken out from the first winding connected to the switching element, the primary winding and the secondary winding are used as in the case of using a transformer. High efficiency can be realized without a decrease in power conversion efficiency due to leakage flux between windings.
【００４４】また、トランスを使用しないため、小形化
及び低コスト化が可能になる。Further, since no transformer is used, downsizing and cost reduction can be achieved.
【００４５】請求項３のＤＣ−ＤＣコンバータでは、部
品点数が少なくなるため、さらなる小形化及び低コスト
化が実現できる。In the DC-DC converter of the third aspect, the number of parts is reduced, so that further downsizing and cost reduction can be realized.
【図１】本発明に係るＤＣ−ＤＣコンバータの第１の実
施例の回路図である。FIG. 1 is a circuit diagram of a first embodiment of a DC-DC converter according to the present invention.
【図２】本発明に係るＤＣ−ＤＣコンバータの第２の実
施例の回路図である。FIG. 2 is a circuit diagram of a second embodiment of a DC-DC converter according to the present invention.
【図３】本発明に係るＤＣ−ＤＣコンバータの第３の実
施例の回路図である。FIG. 3 is a circuit diagram of a third embodiment of a DC-DC converter according to the present invention.
【図４】図１のＤＣ−ＤＣコンバータにおける出力電圧
の特性を示す動作波形図である。FIG. 4 is an operation waveform diagram showing the characteristics of the output voltage in the DC-DC converter of FIG.
【図５】従来のＤＣ−ＤＣコンバータの回路図である。FIG. 5 is a circuit diagram of a conventional DC-DC converter.
１０ 電源 １１ １次巻線 １２ スイッチング素子（バイポーラトランジス
タ） １３ ２次巻線 １４ａ〜１４ｄ、２２ａ〜２２ｄ、３２ａ〜３２ｃ
ダイオード １５ａ、１５ｂ、２３ａ、２３ｂ、３３ａ コンデ
ンサ １６ 基準電位（接地電位） ２１、３１ 巻線 Ａ、Ｂ、Ｃ、Ｄ、Ｅ、Ｆ 接続点10 Power Supply 11 Primary Winding 12 Switching Element (Bipolar Transistor) 13 Secondary Winding 14a-14d, 22a-22d, 32a-32c
Diodes 15a, 15b, 23a, 23b, 33a Capacitor 16 Reference potential (ground potential) 21, 31 Windings A, B, C, D, E, F Connection points
Claims (3)
巻線と、該１次巻線の他端に接続されたスイッチング素
子と、前記１次巻線と磁気結合している２次巻線と、前
記２次巻線の出力側と基準電位との間に接続された第１
のコンデンサ及び第１のダイオードからなる直列回路
と、前記第１のコンデンサと前記第１のダイオードの接
続点と基準電位との間に接続された第２のダイオード
と、前記２次巻線の出力側と第１のコンデンサの接続点
と基準電位との間に接続された第２のコンデンサ及び第
３のダイオードからなる直列回路と、前記第２のコンデ
ンサと前記第３のダイオードの接続点と基準電位との間
に接続された第４のダイオードとを備え、 前記第１のダイオードのアノードが前記第１のコンデン
サに接続され、前記第２のダイオードのアノードが基準
電位に接続され、前記第３のダイオードのカソードが前
記第２のコンデンサに接続され、前記第４のダイオード
のカソードが基準電位に接続されていることを特徴とす
るＤＣ−ＤＣコンバータ。1. A power supply, a primary winding having one end connected to the power supply, a switching element connected to the other end of the primary winding, and a magnetic coupling with the primary winding. A first winding connected between the secondary winding and the output side of the secondary winding and a reference potential
Series circuit composed of the first capacitor and a first diode, a second diode connected between a connection point of the first capacitor and the first diode and a reference potential, and an output of the secondary winding. Side and a connection point between the first capacitor and a reference potential, a series circuit including a second capacitor and a third diode, a connection point between the second capacitor and the third diode, and a reference A fourth diode connected to the electric potential, the anode of the first diode being connected to the first capacitor, the anode of the second diode being connected to a reference potential, and the third diode The DC-DC converter in which the cathode of the diode is connected to the second capacitor, and the cathode of the fourth diode is connected to a reference potential.
ッチング素子と、前記スイッチング素子の他端と基準電
位との間に接続された巻線と、前記スイッチング素子と
前記巻線の接続点と基準電位との間に接続された第１の
コンデンサ及び第１のダイオードからなる直列回路と、
前記第１のコンデンサと前記第１のダイオードの接続点
と基準電位との間に接続された第２のダイオードと、前
記スイッチング素子と前記第１のコンデンサの接続点と
基準電位との間に接続された第２のコンデンサ及び第３
のダイオードからなる直列回路と、前記第２のコンデン
サと前記第３のダイオードの接続点と基準電位との間に
接続された第４のダイオードとを備え、 前記第１のダイオードのアノードが前記第１のコンデン
サに接続され、前記第２のダイオードのカソードが基準
電位に接続され、前記第３のダイオードのカソードが前
記第２のコンデンサに接続され、前記第４のダイオード
のカソードが基準電位に接続されていることを特徴とす
るＤＣ−ＤＣコンバータ。2. A power supply, a switching element having one end connected to the power supply, a winding connected between the other end of the switching element and a reference potential, and a connection point between the switching element and the winding. And a series circuit composed of a first capacitor and a first diode connected between the reference potential and
A second diode connected between the connection point of the first capacitor and the first diode and a reference potential, and a connection between the connection point of the switching element and the first capacitor and the reference potential Second capacitor and third
And a fourth diode connected between a connection point of the second capacitor and the third diode and a reference potential, and the anode of the first diode is the first diode. Connected to the first capacitor, the cathode of the second diode is connected to the reference potential, the cathode of the third diode is connected to the second capacitor, the cathode of the fourth diode is connected to the reference potential A DC-DC converter characterized in that
と、該巻線の他端に接続されたスイッチング素子と、前
記巻線と前記スイッチング素子の接続点と基準電位との
間に接続された第１のダイオードと、前記巻線の他端と
前記第１のダイオードの接続点と基準電位との間に接続
された第１のコンデンサ及び第２のダイオードからなる
直列回路と、前記第１のコンデンサと前記第２のダイオ
ードの接続点と基準電位との間に接続された第３のダイ
オードとを備え、 前記第１のダイオードのアノードが前記巻線の他端に接
続され、前記第２のダイオードのカソードが前記コンデ
ンサに接続され、前記第３のダイオードのカソードが基
準電位に接続されていることを特徴とするＤＣ−ＤＣコ
ンバータ。3. A power supply, a winding having one end connected to the power supply, a switching element connected to the other end of the winding, a connection point between the winding and the switching element, and a reference potential. A first diode connected to, a series circuit including a first capacitor and a second diode connected between the other end of the winding and a connection point of the first diode and a reference potential, A third diode connected between a connection point of the first capacitor and the second diode and a reference potential, the anode of the first diode is connected to the other end of the winding, A DC-DC converter, wherein the cathode of the second diode is connected to the capacitor, and the cathode of the third diode is connected to a reference potential.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7214897A JPH0965653A (en) | 1995-08-23 | 1995-08-23 | Dc-dc converter |
| TW085108072A TW437145B (en) | 1995-08-23 | 1996-07-04 | DC-DC converter |
| KR1019960030677A KR100224124B1 (en) | 1995-08-23 | 1996-07-26 | Dc-dc converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7214897A JPH0965653A (en) | 1995-08-23 | 1995-08-23 | Dc-dc converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0965653A true JPH0965653A (en) | 1997-03-07 |
Family
ID=16663378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7214897A Pending JPH0965653A (en) | 1995-08-23 | 1995-08-23 | Dc-dc converter |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH0965653A (en) |
| KR (1) | KR100224124B1 (en) |
| TW (1) | TW437145B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008062706A1 (en) * | 2006-11-20 | 2008-05-29 | Fujitsu Ten Limited | Voltage output circuit, integrated circuit and electronic device |
| JP2008131837A (en) * | 2006-11-24 | 2008-06-05 | Stanley Electric Co Ltd | Power supply |
-
1995
- 1995-08-23 JP JP7214897A patent/JPH0965653A/en active Pending
-
1996
- 1996-07-04 TW TW085108072A patent/TW437145B/en active
- 1996-07-26 KR KR1019960030677A patent/KR100224124B1/en not_active IP Right Cessation
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008062706A1 (en) * | 2006-11-20 | 2008-05-29 | Fujitsu Ten Limited | Voltage output circuit, integrated circuit and electronic device |
| JP2008131731A (en) * | 2006-11-20 | 2008-06-05 | Fujitsu Ten Ltd | Voltage output circuit, integrated circuit, and electronic apparatus |
| US8058853B2 (en) | 2006-11-20 | 2011-11-15 | Fujitsu Ten Limited | Voltage output circuit, integrated circuit and electronic device |
| JP2008131837A (en) * | 2006-11-24 | 2008-06-05 | Stanley Electric Co Ltd | Power supply |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100224124B1 (en) | 1999-10-15 |
| TW437145B (en) | 2001-05-28 |
| KR970013613A (en) | 1997-03-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20031224 |