JPS5851316A - Power supply device - Google Patents
Power supply deviceInfo
- Publication number
- JPS5851316A JPS5851316A JP14933681A JP14933681A JPS5851316A JP S5851316 A JPS5851316 A JP S5851316A JP 14933681 A JP14933681 A JP 14933681A JP 14933681 A JP14933681 A JP 14933681A JP S5851316 A JPS5851316 A JP S5851316A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- error signal
- component
- output voltage
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Control Of Electrical Variables (AREA)
- Continuous-Control Power Sources That Use Transistors (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、入力力率の高い、主にインバータ回路を用い
た放電灯点灯装置に用いて好適な定電圧直流電源装置に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a constant voltage DC power supply device having a high input power factor and suitable for use in a discharge lamp lighting device mainly using an inverter circuit.
従来、定電圧直流電源装置として、第1図に示すように
、交流電源1に接続された全波整流器2と、負荷6への
出力電圧と基準電圧源4の基準電圧とを比較して出力電
圧と基準電圧との差に応じた誤差信号を出力する誤差増
巾器5と、全波整流器2の負荷側に接続され前記誤差信
号を減少するよう負荷3への通電量を制御する制御回路
6とを具備し、負荷6に定電圧の直流を供給するものが
知られている。Conventionally, as shown in FIG. 1, as a constant voltage DC power supply device, a full-wave rectifier 2 connected to an AC power supply 1 compares the output voltage to a load 6 with a reference voltage of a reference voltage source 4 and outputs the output voltage. An error amplifier 5 that outputs an error signal according to the difference between the voltage and the reference voltage, and a control circuit that is connected to the load side of the full-wave rectifier 2 and controls the amount of current to the load 3 so as to reduce the error signal. 6 and supplies constant voltage direct current to the load 6 is known.
しかし、このような電源装置は、通常、全波整流器2の
出力側に平滑コンデンサ等の平滑回路を含むため、入力
電流の波形はピーク値の高い高調波成分の多いものとな
り、したがって装置の入力力率は高々60%程度の低い
ものであった。However, since such a power supply device usually includes a smoothing circuit such as a smoothing capacitor on the output side of the full-wave rectifier 2, the waveform of the input current has many harmonic components with high peak values. The power factor was as low as 60% at most.
また、特開昭50−98175号に開示されるように、
全波整流器の負荷側の脈流電圧波形と負荷電流波形とを
比較してその差信号を得、この差信号により負荷への通
電量を制御して前記負荷電流波形を強制的に前記脈流波
形と類似させることにより高入力力率を実現する電源装
置も知られている。Also, as disclosed in Japanese Patent Application Laid-open No. 50-98175,
The pulsating voltage waveform on the load side of the full-wave rectifier is compared with the load current waveform to obtain a difference signal, and this difference signal controls the amount of current to the load to forcibly change the load current waveform to the pulsating current waveform. A power supply device that achieves a high input power factor by making the waveform similar is also known.
しかし、この電源装置は定電圧特性については何ら考慮
されておらず、高入力力率の定電圧直流電源は未だ実現
されていない。However, this power supply device does not give any consideration to constant voltage characteristics, and a constant voltage DC power supply with a high input power factor has not yet been realized.
本発明の目的は、高入力力率で、特にインバータ回路を
用いた放電灯点灯装置用として好適な定電圧直流電源装
置を提供することである。An object of the present invention is to provide a constant voltage DC power supply device with a high input power factor, which is particularly suitable for use in a discharge lamp lighting device using an inverter circuit.
以下図面を用いて本発明の詳細な説明する。The present invention will be described in detail below using the drawings.
第6図は本発明の一実施例に係る電源装置の回路図であ
る。この電源装置は、全波整流器2の脈流出力中の交流
成分を誤差信号にこの誤差信号と同相で重畳する交流分
重畳回路7を第1図の電源装置に付加したものである。FIG. 6 is a circuit diagram of a power supply device according to an embodiment of the present invention. This power supply device is obtained by adding an AC component superimposing circuit 7 for superimposing an AC component in the pulsating output of the full-wave rectifier 2 onto an error signal in phase with the error signal to the power supply device shown in FIG.
この交流分重畳回路は、前記脈流出力を分圧して重畳量
を調整する抵抗8および9と、分圧された脈流電圧中の
交流成分のみを誤差増巾器5に入力するコンデンサ10
とからなる。なお、この実施例においては前記交流成分
を負荷6への出力電圧に関する信号と加算した後基準電
圧と比較して交流成分の重畳された誤差信号を得ている
か、前記誤差信号を得た後に加算器等を用いて前記交流
成分と加算してもよい。This alternating current component superimposing circuit includes resistors 8 and 9 that divide the pulsating current output and adjust the amount of superimposition, and a capacitor 10 that inputs only the alternating current component in the divided pulsating current voltage to the error amplifier 5.
It consists of In this embodiment, the AC component is added to the signal related to the output voltage to the load 6 and then compared with the reference voltage to obtain an error signal on which the AC component is superimposed. It may be added to the AC component using a device or the like.
また直流を遮断する素子としてコンデンサ10を用いた
が、絶縁トランスを用いてもよく、さらに低域遮断フィ
ルタまたは帯域通過フィルタなどを用いて直流を遮断す
るとともに、各高調波成分を特定の割合で重畳すること
によって、入力電流をより好適な波形に調節するように
してもよい。In addition, although the capacitor 10 is used as an element for cutting off direct current, an isolation transformer may also be used. Furthermore, a low cutoff filter or a bandpass filter or the like may be used to cut off direct current and reduce each harmonic component at a specific ratio. By superimposing them, the input current may be adjusted to a more suitable waveform.
次にこの電源装置の動作を説明する。交流電源1からの
交流入力は全波整流器2で整流され、制御回路6を経て
直流となり負荷3へ供給される。Next, the operation of this power supply device will be explained. An AC input from an AC power source 1 is rectified by a full-wave rectifier 2, passes through a control circuit 6, becomes DC, and is supplied to a load 3.
負荷6への供給電圧すなわち出力電圧が基準電圧より高
いときは誤差増巾器5が例えば正の誤差信号を出力し、
−この誤差信号に応じて制御回路は通電量を減少し出力
電圧を下げる。出力電圧が基準電圧より低いときは各部
が上述と反対に出力電圧を上げるように動作する。した
がって、この電源装置は常に基準電圧に等しい電圧を出
力する定電圧特性を有する。また、この電源装置におい
ては、前記誤差信号に交流成分が誤差信号と同相に重畳
されるので、交流成分の瞬時値が大きいとき(第2図T
I)、誤差信号は出力電圧が高くなった場合と同じ向き
に、また、瞬時値の小さいとき(第2図T2)は出力電
圧が低くなった場合と同じ向きに変動し、それぞれ入力
電流は減少および増加する。この結果、従来例における
入力電流波形(第2図a)の高いピークは押えられ、例
えば98%程度の高入力力率が得られる。この電源装置
の入力電流波形(全波整流後)を第2図すおよびCに、
入力電圧波形(全波整流後)を第2図dに示す。Cはb
よりも交流成分を多く重畳した場合のものである。When the supply voltage to the load 6, that is, the output voltage, is higher than the reference voltage, the error amplifier 5 outputs, for example, a positive error signal,
- In response to this error signal, the control circuit reduces the current flow and lowers the output voltage. When the output voltage is lower than the reference voltage, each part operates to raise the output voltage, contrary to the above. Therefore, this power supply device has a constant voltage characteristic that always outputs a voltage equal to the reference voltage. In addition, in this power supply device, since the alternating current component is superimposed on the error signal in phase with the error signal, when the instantaneous value of the alternating current component is large (Fig. 2 T
I), the error signal fluctuates in the same direction as when the output voltage becomes high, and when the instantaneous value is small (T2 in Figure 2), the error signal fluctuates in the same direction as when the output voltage becomes low, and the input current is Decrease and increase. As a result, the high peak of the input current waveform (FIG. 2a) in the conventional example is suppressed, and a high input power factor of, for example, about 98% is obtained. The input current waveforms (after full-wave rectification) of this power supply are shown in Figure 2 and C.
The input voltage waveform (after full-wave rectification) is shown in Figure 2d. C is b
This is the case when more AC components are superimposed.
制御回路6としては例えばスイッチングレギュレータ等
における昇圧形回路、反転形回路のいずれの方式の負帰
還形直流定電圧制御回路を用いてもよい。As the control circuit 6, for example, a negative feedback direct current constant voltage control circuit such as a step-up circuit or an inverting circuit in a switching regulator or the like may be used.
第4図および第5図に本発明の電源装置における制御回
路6の具体例を示す。第4図は昇圧形、第5図は反転形
の制御回路である。同図において61はチョーク、62
はトランジスタ、65はダイオード、64はコンデンサ
である。また、チョーク65とコンデンサ66とで雑音
防止フィルターを形成している。4 and 5 show specific examples of the control circuit 6 in the power supply device of the present invention. FIG. 4 shows a boost type control circuit, and FIG. 5 shows an inversion type control circuit. In the same figure, 61 is a choke, 62
is a transistor, 65 is a diode, and 64 is a capacitor. Further, the choke 65 and the capacitor 66 form a noise prevention filter.
次に第4図の制御回路の動作を説明する。トランジスタ
62のベースには、第6図の誤差増巾器5の出力により
パルス巾の制御されたパルスヲ出力するパルス巾変調回
路(図示せず)が接続される。このパルスは例えば誤差
増巾器5の出力とデユーティレシオとが正比例するよう
なパルス巾で出力する。今、第6図における負荷3への
出力電圧が基準電圧より下り、誤差増巾器5の出力が上
ると、前記パルス巾変調回路から出力されるパルスは゛
そのパルス巾(デユーティレシオ)が大きくなり、トラ
ンジスタ62のオン時間が長くなってチョーク61の電
流を増大してその電磁エネルギーが増加するのでトラン
ジスタ62がオフしたとき、このチョーク61からダイ
オード63を介して前記増大した電流が流れコンデンサ
64により平滑されて出力するので出力電圧が上る。出
力電圧が上ったときは上述と反対に動作して出力電圧が
下る。このようにして出力電圧は常に一定に保たれる。Next, the operation of the control circuit shown in FIG. 4 will be explained. A pulse width modulation circuit (not shown) that outputs a pulse whose pulse width is controlled by the output of the error amplifier 5 shown in FIG. 6 is connected to the base of the transistor 62. This pulse is output with a pulse width such that, for example, the output of the error amplifier 5 and the duty ratio are directly proportional. Now, when the output voltage to the load 3 in FIG. 6 falls below the reference voltage and the output of the error amplifier 5 rises, the pulse output from the pulse width modulation circuit has a large pulse width (duty ratio). Therefore, when the transistor 62 is turned on, the on time of the transistor 62 becomes longer, the current of the choke 61 increases, and its electromagnetic energy increases. Since the output voltage is smoothed and output, the output voltage increases. When the output voltage increases, the operation is opposite to that described above and the output voltage decreases. In this way the output voltage is always kept constant.
また第5図の制御回路の場合は第4図の制御回路と電圧
、電流の符号が逆になるほかは同様に動作して出力を定
電圧化する。The control circuit shown in FIG. 5 operates in the same manner as the control circuit shown in FIG. 4, except that the signs of voltage and current are reversed, and the output is made constant.
以上のように本発明によると、定電圧直流電源装置の電
圧制御回路に脈流電圧の交流成分を印加して入力電流す
なわち出力電流のピーク分をこの交流成分でキャンセル
することにより、入力力率の大巾な改善を図ることがで
きる。また、この電源装置は平均電圧が一定であるため
、特に放電灯用として好適なものである。As described above, according to the present invention, by applying the alternating current component of the pulsating voltage to the voltage control circuit of the constant voltage DC power supply and canceling the peak portion of the input current, that is, the output current, with this alternating current component, the input power factor is reduced. It is possible to achieve significant improvements in Further, since this power supply device has a constant average voltage, it is particularly suitable for use in discharge lamps.
第1図は従来の電源装置の回路図、第2図は第1図およ
び第6図の電源装置の制御回路の入力電流波形(、−c
)および入力電圧波形(d)、第3図は本発明の一実施
例の電源装置の回路図、そして、第4図および第5図は
第6図の電源装置の制御回路の具体例を示す回路図であ
る。
1・・・交流電源 2・・・全波整流器3・・・
負 荷 4・・・基準電圧源5・・・誤差増巾
器 6・・・制御回路7・・・交流分重畳回路 8
,9・・・抵 抗10・・・コンデンサ
特許出願人東芝電材株式会社
代理人 弁理士 伊 東 辰 雄
l 伊 東 哲 也
第2図
T、 T2Fig. 1 is a circuit diagram of a conventional power supply device, and Fig. 2 is an input current waveform (, -c
) and input voltage waveform (d), FIG. 3 is a circuit diagram of a power supply device according to an embodiment of the present invention, and FIGS. 4 and 5 show specific examples of the control circuit of the power supply device of FIG. 6. It is a circuit diagram. 1... AC power supply 2... Full wave rectifier 3...
Load 4...Reference voltage source 5...Error amplifier 6...Control circuit 7...AC component superimposition circuit 8
, 9... Resistor 10... Capacitor patent applicant Toshiba Electric Materials Co., Ltd. Representative Patent attorney Tatsuo Ito Tetsuya Ito Figure 2 T, T2
Claims (1)
、 基準電圧を発生する基準電圧源と、 負荷への出力電圧と前記基準電圧とを比較してこの出力
電圧と基準電圧との差に応じた誤差信号を出力する誤差
増巾器と、 前記全波整流器の負荷側に接続されて前記誤差信号が減
少するよう負荷への通電量を制御する制御回路と、 前記全波整流器の脈流出力中の交流成分を前記誤差信号
に重畳する交流会重畳回路とを具備したことを特徴とす
る電源装置。[Claims] 1. An AC power source, a full-wave rectifier that is connected to the AC power source and outputs a pulsating current, a reference voltage source that generates a reference voltage, and an output voltage to a load and the reference voltage. an error amplifier that compares and outputs an error signal according to the difference between this output voltage and a reference voltage; and an error amplifier that is connected to the load side of the full-wave rectifier and controls the amount of current applied to the load so as to reduce the error signal. A power supply device comprising: a control circuit for controlling; and an exchange superimposition circuit for superimposing an alternating current component in the pulsating output of the full-wave rectifier onto the error signal.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14933681A JPS5851316A (en) | 1981-09-24 | 1981-09-24 | Power supply device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14933681A JPS5851316A (en) | 1981-09-24 | 1981-09-24 | Power supply device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5851316A true JPS5851316A (en) | 1983-03-26 |
JPH0379725B2 JPH0379725B2 (en) | 1991-12-19 |
Family
ID=15472874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14933681A Granted JPS5851316A (en) | 1981-09-24 | 1981-09-24 | Power supply device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5851316A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4978894A (en) * | 1988-09-08 | 1990-12-18 | Kabushiki Kaisha Toshiba | Single phase to three phase rectifier/inverter with DC ripple compensation |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5194545A (en) * | 1975-02-17 | 1976-08-19 |
-
1981
- 1981-09-24 JP JP14933681A patent/JPS5851316A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5194545A (en) * | 1975-02-17 | 1976-08-19 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4978894A (en) * | 1988-09-08 | 1990-12-18 | Kabushiki Kaisha Toshiba | Single phase to three phase rectifier/inverter with DC ripple compensation |
Also Published As
Publication number | Publication date |
---|---|
JPH0379725B2 (en) | 1991-12-19 |
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