JPH0811055Y2 - Step-down chopper device - Google Patents
Step-down chopper deviceInfo
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- JPH0811055Y2 JPH0811055Y2 JP1989075334U JP7533489U JPH0811055Y2 JP H0811055 Y2 JPH0811055 Y2 JP H0811055Y2 JP 1989075334 U JP1989075334 U JP 1989075334U JP 7533489 U JP7533489 U JP 7533489U JP H0811055 Y2 JPH0811055 Y2 JP H0811055Y2
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Description
【考案の詳細な説明】 A.産業上の利用分野 本考案は降圧チョッパ装置に関するものである。[Detailed Description of the Invention] A. Field of Industrial Application The present invention relates to a step-down chopper device.
B.考案の概要 本考案は、直流電流を所定周期でオン，オフさせて負
荷に電流を供給するようにしたチョッパ装置において、 通常の電流断続時と負荷の急変時を検出選別し適応制
御を行うことにより、 負荷急変時の出力電圧の過渡変動を改善するものであ
る。B. Outline of the Invention The present invention is a chopper device in which a direct current is turned on and off at a predetermined cycle to supply a current to a load, and a normal current interruption and a sudden load change are detected and adaptively controlled. By doing so, it is possible to improve the transient fluctuation of the output voltage when the load changes suddenly.
C.従来の技術 第６図は従来の降圧チョッパ装置の１例を示すもの
で、１は直流電源であるバッテリ、２はスイッチング素
子であるトランジスタ、３はリアクトル、４はダイオー
ド、５はコンデンサであって、これらによってチョッパ
回路10が形成される。11aはチョッパ回路10の出力電圧
すなわち負荷６に印加されるべき電圧E0とチョッパ回路
10の設定電圧Vsetを入力する第１の突合せ回路、12は電
圧制御アンプ、11bは電圧制御アンプ12の出力電圧Vcと
発振器15の出力信号を入力とする第２の突合せ回路、13
は第２の突合せ回路11bの偏差出力信号を入力とする比
較増幅器、14はチョッパ回路10のトランジスタ２をオ
ン，オフ駆動するドライバ回路である。これらの第１の
突合せ回路11a,電圧制御アンプ12,第２の突合せ回路11
b,比較増幅器13,ドライバ回路14および発振器15によっ
て動作制御回路20が構成される。C. Conventional Technology FIG. 6 shows an example of a conventional step-down chopper device. 1 is a battery which is a DC power source, 2 is a transistor which is a switching element, 3 is a reactor, 4 is a diode, and 5 is a capacitor. Therefore, these form the chopper circuit 10. 11a is the output voltage of the chopper circuit 10, that is, the voltage E 0 to be applied to the load 6 and the chopper circuit
The first matching circuit for inputting the set voltage Vset of 10, 12 for the voltage control amplifier, 11b for the second matching circuit for inputting the output voltage Vc of the voltage control amplifier 12 and the output signal of the oscillator 15, 13
Is a comparison amplifier that receives the deviation output signal of the second matching circuit 11b as an input, and 14 is a driver circuit that turns on and off the transistor 2 of the chopper circuit 10. These first matching circuit 11a, voltage control amplifier 12, second matching circuit 11
An operation control circuit 20 is configured by b, the comparison amplifier 13, the driver circuit 14, and the oscillator 15.
上記構成の降圧チョッパ装置によれば、出力電圧E0と
設定電圧Vsetが第１の突合せ回路11aにおいて突き合わ
され、その偏差電圧に基づいて電圧制御アンプの出力電
圧Vcが得られる。出力電圧Vcは第２の突合せ回路11bに
おいて発振器15の発振信号と突き合わされ、その偏差電
圧に基づいて比較増幅器13によって所定時間幅のパルス
信号Vpが得られる。ドライバ回路14はこのパルス信号Vp
に基づいてトランジスタ２をオン，オフ制御する。According to the step-down chopper device having the above configuration, the output voltage E 0 and the set voltage Vset are matched in the first matching circuit 11a, and the output voltage Vc of the voltage control amplifier is obtained based on the deviation voltage. The output voltage Vc is matched with the oscillation signal of the oscillator 15 in the second matching circuit 11b, and the comparison amplifier 13 obtains the pulse signal Vp of a predetermined time width based on the deviation voltage. The driver circuit 14 outputs this pulse signal Vp
The transistor 2 is turned on / off based on the above.
D.考案が解決しようとする課題 第７図は従来の降圧チョッパ回路の電圧，電流特性を
示し、第７図（Ａ）は出力電流I0の特性、第７図（Ｂ）
は電圧制御アンプの出力電圧Vcの特性、第７図（Ｃ）は
制御アンプ13の出力電圧Vpの特性、第７図（Ｄ）はチョ
ッパ回路10の出力電圧E0の特性を示す。D. Problems to be Solved by the Invention FIG. 7 shows the voltage and current characteristics of the conventional step-down chopper circuit. FIG. 7 (A) shows the characteristics of the output current I 0 , and FIG. 7 (B).
Shows the characteristic of the output voltage Vc of the voltage control amplifier, FIG. 7 (C) shows the characteristic of the output voltage Vp of the control amplifier 13, and FIG. 7 (D) shows the characteristic of the output voltage E 0 of the chopper circuit 10.
第７図に示すように、出力電圧E0はリアクトル３を流
れる電流I0が連続する場合は、E0＝EI（TON/T）となる
（ここでEIは入力電圧、TONはパルス信号のオン時間、
Ｔはパルス信号の１周期である）。しかし、出力電流I0
が減少し、リアクトル３の電流が断続するようになる
と、出力電圧E0を一定に保つためにはTONの期間を短く
しなければならず、出力電流I0＝０ではTON（duty）＝
０％となる。As shown in FIG. 7, the output voltage E 0 is E 0 = E I (T ON / T) when the current I 0 flowing through the reactor 3 is continuous (where E I is the input voltage, T ON Is the on time of the pulse signal,
T is one period of the pulse signal). However, the output current I 0
Is reduced and the current of the reactor 3 becomes intermittent, the period of T ON must be shortened in order to keep the output voltage E 0 constant. At the output current I 0 = 0, T ON (duty) =
It becomes 0%.
以上のような動作にするため出力電流が小さい領域か
ら急に大電流を取り出そうとすると、TON期間が短い状
態から（無負荷なら殆どオフ状態）TON＝Ｔ×（E0／
EI）の状態まで制御する必要がある。このTON期間を調
整するための必要時間によって、第７図（Ｄ）に示すよ
うに、過渡応答が悪化する欠点があった。When suddenly trying to retrieve a large current from the domain output current is small for the above operation, (mostly off state if no load) T ON period is a short state T ON = T × (E 0 /
It is necessary to control to the state of E I ). Due to the time required to adjust the T ON period, the transient response is deteriorated as shown in FIG. 7 (D).
すなわち、第７図に示すように、電流が断続する状態
では電圧制御アンプ12の出力はほとんど０に近く、通流
幅TONも０に近い状態になっている。この状態から出力
電流I0を急に増加させた場合の応答が問題となっていた
が、出力電流（I0）増加後の定常状態を考えると電圧制
御アンプ12の出力電圧信号はVc、通流幅はTON＝E0／E1
となる。よって、第７図に示す過渡応答は電圧制御アン
プ12の出力が０からVcへ、通流幅TONがほぼ０からE0／E
Iへ移行するのに時間がかかるために発生すると考えら
れる。That is, as shown in FIG. 7, in the state where the current is intermittent, the output of the voltage control amplifier 12 is almost 0, and the conduction width T ON is also close to 0. The response when the output current I 0 was suddenly increased from this state was a problem, but considering the steady state after the output current (I 0 ) increased, the output voltage signal of the voltage control amplifier 12 is Vc, Flow width is T ON = E 0 / E 1
Becomes Therefore, in the transient response shown in FIG. 7, the output of the voltage control amplifier 12 is from 0 to Vc, and the conduction width T ON is almost 0 to E 0 / E.
It is thought to occur because it takes time to move to I.
本考案は上述の問題点に鑑みてなされたもので、その
目的は、チョッパ回路の電流断続条件下から負荷急増時
に適正な制御を行うことにより過渡応答性に優れた降圧
チョッパ装置を提供することである。The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a step-down chopper device excellent in transient response by performing appropriate control when the load suddenly increases from the intermittent current condition of the chopper circuit. Is.
E.課題を解決するための手段 本考案は、上記目的を達成するために、直流電流をス
イッチング素子により所定周期でオン，オフし、負荷に
電流を供給するチョッパ回路と、このチョッパ回路の出
力電圧の設定出力電圧に対する偏差分に応じて前記スイ
ッチング素子をオンオフ制御する動作制御回路と、前記
チョッパ回路の出力電流の出力設定電流に対する偏差分
を基に電流の断続条件を検出する制御比較器と、前記出
力電流の変化分を検出する電流変化検出回路と、この電
流変化検出回路の検出信号と前記制御比較器の検出信号
を基に前記負荷に供給すべき電力の過渡変化を補償する
補正信号を前記動作制御回路に入力する補正信号発生回
路からなる過渡応答調整回路によって降圧チョッパ装置
を構成する。E. Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a chopper circuit for supplying a current to a load by turning on / off a direct current at a predetermined cycle by a switching element, and an output of this chopper circuit. An operation control circuit that controls ON / OFF of the switching element according to a deviation amount of a voltage with respect to a set output voltage, and a control comparator that detects a current interruption condition based on a deviation amount of an output current of the chopper circuit with respect to an output set current. A current change detection circuit for detecting a change in the output current, and a correction signal for compensating for a transient change in power to be supplied to the load based on the detection signal of the current change detection circuit and the detection signal of the control comparator. The step-down chopper device is constituted by a transient response adjusting circuit including a correction signal generating circuit for inputting to the operation control circuit.
また、本考案は直流電流をスイッチング素子により所
定周期でオンオフし、負荷に電流を供給するチョッパ回
路と、このチョッパ回路の出力電圧の設定出力電圧に対
する偏差分を入力とする第１および第２の電圧制御アン
プと、前記チョッパ回路の入力電圧と出力設定電圧の比
に基づいて前記第１の電圧制御アンプの出力信号にリミ
ッタをかけるリミッタ回路と、前記チョッパ回路の出力
電流と設定出力電流の偏差分に基づいて前記チョッパ回
路の電流断続条件を検出すると共に前記出力電流が増加
したとき前記第２の電圧制御アンプの出力信号をオフに
する手段からなる過渡応答調整回路によって降圧チョッ
パ装置を構成する。Further, according to the present invention, a chopper circuit for turning on / off a direct current at a predetermined cycle by a switching element to supply a current to a load, and a first and a second inputting a deviation of an output voltage of the chopper circuit with respect to a set output voltage. A voltage control amplifier, a limiter circuit for limiting the output signal of the first voltage control amplifier based on the ratio of the input voltage to the output set voltage of the chopper circuit, and the deviation between the output current of the chopper circuit and the set output current. A step-down chopper device is constituted by a transient response adjusting circuit which is configured to detect a current interrupting condition of the chopper circuit based on the amount of time and turn off the output signal of the second voltage control amplifier when the output current increases. .
F.作用 本考案によれば、チョッパ回路の出力電流が急増した
ことを検出し、それによって予め予想される過渡応答を
打消すような補正信号を制御信号に加えて供給する。こ
れにより、応答の遅い電圧制御アンプの出力が応答して
定常状態に落ち着く期間でも出力電圧が大きく低下する
ことが無く、過渡電圧変動が小さくなる。F. Action According to the present invention, a sudden increase in the output current of the chopper circuit is detected, and thereby a correction signal that cancels the transient response expected in advance is supplied in addition to the control signal. As a result, the output voltage does not greatly decrease even during the period in which the output of the voltage control amplifier having a slow response responds and settles in the steady state, and the transient voltage fluctuation is reduced.
また、本考案によれば、チョッパ回路の出力電圧の変
動分に応じた偏差分を入力とする第1,第２の電圧制御ア
ンプを並列に設け、電流連続条件下では第２の電圧制御
アンプの出力は無視され、チョッパ回路は通常動作を行
う。この状態で負荷電流が減少すると電流断続条件下で
はチョッパ回路の出力電圧が上昇してしまうので、第２
の電圧制御アンプの出力により出力電圧と一定に保つよ
うにする。さらにその状態でチョッパ回路の出力電流が
急増した場合はスイッチをオフにして第１の電圧制御ア
ンプのみで制御する。Further, according to the present invention, the first and second voltage control amplifiers that receive the deviation corresponding to the fluctuation of the output voltage of the chopper circuit are provided in parallel, and the second voltage control amplifier is provided under the continuous current condition. Output is ignored and the chopper circuit operates normally. If the load current decreases in this state, the output voltage of the chopper circuit rises under the intermittent current condition.
Keep the output voltage constant with the output of the voltage control amplifier. Further, if the output current of the chopper circuit suddenly increases in that state, the switch is turned off to control only the first voltage control amplifier.
G.実施例 以下に本考案の実施例を第１図〜第５図を参照しなが
ら説明する。G. Embodiment An embodiment of the present invention will be described below with reference to FIGS.
第１図は本考案の第１実施例による降圧チョッパ装置
を示し、第２図，第３図はその動作特性を示す。第１図
において第６図のものと同一部材または相当部分には同
一符号を付してある。第１図において31はチョッパ回路
10の出力電流I0と出力設定電通Isetを入力とする第３の
突合せ回路、32は第３の突合せ回路31の電流偏差分を入
力として電流断続条件を検出する第２の制御比較器、33
は第２の制御比較器32の検出信号と出力電流変化検出回
路35の検出信号を入力とするアンドゲート、34はアンド
ゲート33の出力信号を入力として補正信号Vaを出力する
補正信号発生回路である。これらの第３の突合せ回路3
1,第２の制御比較器32,アンドゲート33,補正信号発生回
路34および電流変化検出回路35によって過渡応答調整回
路30が構成される。FIG. 1 shows a step-down chopper device according to a first embodiment of the present invention, and FIGS. 2 and 3 show its operating characteristics. In FIG. 1, the same members or corresponding parts as those in FIG. 6 are designated by the same reference numerals. In FIG. 1, 31 is a chopper circuit.
A third matching circuit that receives the output current I 0 of 10 and the output setting Dentsu Iset, 32 is a second control comparator that detects the current interrupt condition by using the current deviation of the third matching circuit 31 as an input, 33
Is an AND gate that receives the detection signal of the second control comparator 32 and the detection signal of the output current change detection circuit 35, and 34 is a correction signal generation circuit that outputs the correction signal Va using the output signal of the AND gate 33 as an input. is there. These third matching circuit 3
A transient response adjusting circuit 30 is configured by the first and second control comparators 32, the AND gate 33, the correction signal generating circuit 34, and the current change detecting circuit 35.
第１図の降圧チョッパ装置によれば、第１の突合せ回
路11aでチョッパ回路10の出力電圧E0と出力設定電圧Vse
tの偏差電圧を得、この偏差電圧を電圧制御アンプ12で
増幅して第２図（Ａ）に示す制御電圧信号Vcを得る。According to the step-down chopper device of FIG. 1, the output voltage E 0 of the chopper circuit 10 and the output set voltage Vse are generated by the first matching circuit 11a.
The deviation voltage of t is obtained, and this deviation voltage is amplified by the voltage control amplifier 12 to obtain the control voltage signal Vc shown in FIG.
過渡応答調整回路30においては、チョッパ回路10の出
力電流信号I0と設定電流信号Isetの偏差電流信号を得、
この偏差電流信号を基に第２の制御比較器32により電流
断続条件を検出する。アンドゲート33は、第２の制御比
較器32の検出信号と電流変化検出回路35の検出信号をア
ンド条件として、出力信号を発生する。電流変化検出回
路35は、第３図（Ａ）に示すように出力電流I0の急増を
検出するもので、出力電流I0がIset1がIset2以上へ急増
したことを検出する。また、電流変化検出回路35では、
第３図（Ｂ）に示すように、出力電圧E0の急激な落ち込
みにより検出するようにしても良い。補正信号発生回路
34は、アンドゲート33の出力信号を入力として、第２図
（Ｂ）に示す電圧補正信号Vaを出力する。In the transient response adjustment circuit 30, the deviation current signal of the output current signal I 0 of the chopper circuit 10 and the set current signal Iset is obtained,
Based on this deviation current signal, the second control comparator 32 detects the current interruption condition. The AND gate 33 generates an output signal with the detection signal of the second control comparator 32 and the detection signal of the current change detection circuit 35 as the AND condition. The current change detection circuit 35 detects a sudden increase in the output current I 0 as shown in FIG. 3 (A), and detects that the output current I 0 suddenly increases from Iset 1 to Iset 2 or more. In the current change detection circuit 35,
As shown in FIG. 3B, the output voltage E 0 may be detected by a sudden drop. Correction signal generation circuit
34 receives the output signal of the AND gate 33 and outputs the voltage correction signal Va shown in FIG. 2 (B).
動作制御回路20の第２の突合せ回路11bにおいては、
電圧制御アンプ12からの制御電圧信号Vcと補正信号発生
回路34からの補正電圧信号Vaが加算され、第２図（Ｃ）
に示す電圧信号Vc＋Vaが得られる。第１の制御比較器13
は電圧信号Vc＋Vaを基に第２図（Ｄ）に示す如き電圧パ
ルス信号VTONを発生する。ドライバ回路14は電圧パルス
信号VTONに基づいてチョッパ回路10のトランジスタ２を
オン，オフ制御し、これにより、第２図（Ｅ）に示すよ
うに、出力電圧E0の変動が低減される。In the second matching circuit 11b of the operation control circuit 20,
The control voltage signal Vc from the voltage control amplifier 12 and the correction voltage signal Va from the correction signal generation circuit 34 are added, and the result is shown in FIG.
The voltage signal Vc + Va shown in is obtained. First control comparator 13
Generates a voltage pulse signal V TON as shown in FIG. 2 (D) based on the voltage signal Vc + Va. The driver circuit 14 controls ON / OFF of the transistor 2 of the chopper circuit 10 on the basis of the voltage pulse signal V TON , whereby the fluctuation of the output voltage E 0 is reduced as shown in FIG. 2 (E).
第４図は本考案の第２実施例による降圧チョッパ装置
を示し、第５図はその動作特性を示すものである。第４
図において、第１図のものと同一部材または相当部分に
は同一符号を付している。41aは第１の電圧制御アン
プ、41bは第２の電圧制御アンプ、42はチョッパ回路10
のオンデューティTONを算出するリミッタ回路を構成す
る割算器、43は第３の突合せ回路、44は第４の突合せ回
路、45は第２の制御比較器、46は第２の制御比較器45に
よってオン，オフ制御されるスイッチである。これらの
第１の突合せ回路11a,第２の突合せ回路11b,第１の制御
比較器13,第１の電圧増幅器41a,第２の電圧増幅器41b,
割算器42,第３の突合せ回路43,第４の突合せ回路44,第
２の制御比較器45およびスイッチ46によって過渡応答調
整回路40が構成される。FIG. 4 shows a step-down chopper device according to the second embodiment of the present invention, and FIG. 5 shows its operating characteristics. Fourth
In the figure, the same members or corresponding parts as those in FIG. 1 are designated by the same reference numerals. 41a is the first voltage control amplifier, 41b is the second voltage control amplifier, and 42 is the chopper circuit 10
Of the limiter circuit for calculating the on-duty T ON of the device, 43 is a third matching circuit, 44 is a fourth matching circuit, 45 is a second control comparator, and 46 is a second control comparator. It is a switch that is turned on and off by 45. These first butting circuit 11a, second butting circuit 11b, first control comparator 13, first voltage amplifier 41a, second voltage amplifier 41b,
The divider 42, the third matching circuit 43, the fourth matching circuit 44, the second control comparator 45 and the switch 46 constitute a transient response adjusting circuit 40.
第４図の降圧チョッパ装置において、第１の突合せ回
路11aはチョッパ回路10の出力電圧E0と出力設定電圧Es
を入力として偏差電圧を得、第１の電圧制御アンプ41a
は第１の突合せ回路11aの偏差電圧を増幅制御して偏差
電圧信号Vc1を得る。割算器42は設定電圧Esと入力電圧E
Iを入力としてデューティVTONを算出し、これにより偏
差電圧信号Vc1にリミッタをかける。さらに、第３の突
合せ回路43は出力電圧E0と出力設定電圧Esを入力として
偏差電圧を得、第２の電圧制御アンプ41bはこの偏差電
圧に基づいて偏差電圧信号Vc2を得る。さらに、第４の
突合せ回路44は出力電流I0と出力設定電流Isを入力とし
て偏差電流信号を得、第２の制御比較器45は制御電流信
号を出力し、スイッチ46をオン，オフ制御する。In the step-down chopper device shown in FIG. 4, the first matching circuit 11a includes the output voltage E 0 of the chopper circuit 10 and the output set voltage E s.
Is input to obtain the deviation voltage, and the first voltage control amplifier 41a
Amplifies and controls the deviation voltage of the first matching circuit 11a to obtain the deviation voltage signal V c1 . The divider 42 sets the set voltage Es and the input voltage E
The duty V TON is calculated by inputting I, and the deviation voltage signal V c1 is limited by this. Further, the third matching circuit 43 receives the output voltage E 0 and the output setting voltage Es as input and obtains the deviation voltage, and the second voltage control amplifier 41b obtains the deviation voltage signal V c2 based on this deviation voltage. Further, the fourth matching circuit 44 receives the output current I 0 and the output setting current Is as an input to obtain a deviation current signal, and the second control comparator 45 outputs a control current signal to control the switch 46 to turn on and off. .
すなわち、割算器42により第１の電圧制御アンプ41a
の出力にリミッタを掛け、0.95×ES／EIよりもオンデュ
ーティが下がらないようにする。第２の制御比較器45は
出力電流I0が電流連続条件以下になったことを検出す
る。第２の制御比較器45の出力によりスイッチ46がオン
になり、第２の電圧制御アンプ41bの偏差電圧信号Vc2が
第２の突合せ回路に入力され、この第２の突合せ回路11
bでは第５図（Ｂ）に示すようにVc1＋Vc2の電圧信号が
得られる。しかるに、電流連続条件では第２の制御比較
器45からは信号が出力されず、第２の電圧制御アンプ41
bの出力Vc2は無視され、チョッパ回路10は通常と同じ動
作を行う。かかる状態において出力電流（I0）が減少す
ると、VTONがES／EI×0.95より下がらないため電流断続
条件下では出力電圧E0が上昇してしまうので、スイッチ
46をオンにして第２の電圧制御アンプ41bの出力Vc2によ
り出力電圧E0を一定に保つようにする。さらにこの状態
より出力電流I0が急増した場合は、VTONは0.95×ES／EI
に保たれており、スイッチ46をオフにし、第１の電圧制
御アンプ41aの出力Vc1のみで制御する。したがって、第
５図（Ｄ）に示すように出力電圧の変動が小さくなる。That is, the divider 42 causes the first voltage control amplifier 41a to
Apply a limiter to the output of so that the on-duty does not drop below 0.95 × E S / E I. The second control comparator 45 detects that the output current I 0 has become equal to or less than the continuous current condition. The switch 46 is turned on by the output of the second control comparator 45, the deviation voltage signal V c2 of the second voltage control amplifier 41b is input to the second matching circuit, and the second matching circuit 11
At b, a voltage signal of V c1 + V c2 is obtained as shown in FIG. 5 (B). However, under the continuous current condition, no signal is output from the second control comparator 45, and the second voltage control amplifier 41
The output V c2 of b is ignored and the chopper circuit 10 operates normally. If the output current (I 0 ) decreases in such a state, V TON does not drop below E S / E I × 0.95, so the output voltage E 0 rises under intermittent current conditions.
46 is turned on so that the output voltage E 0 is kept constant by the output V c2 of the second voltage control amplifier 41b. If the output current I 0 suddenly increases from this state, V TON is 0.95 × E S / E I
, The switch 46 is turned off and the output is controlled only by the output V c1 of the first voltage control amplifier 41a. Therefore, the fluctuation of the output voltage becomes small as shown in FIG.
H.考案の効果 本考案は以上の如くであって、請求項第１項の考案に
よれば、オン期間をほぼ０の状態からチョッパ回路の
（出力電圧）／（入力電圧）の比まで、予め予想される
過渡応答を補正するような割り込み信号を注入して瞬時
に追従させることがてきるようにしたから、負荷電流が
少なく過渡応答性の悪い電流断続条件下から負荷急増時
の出力電圧の過渡変動を軽減することが可能となる。H. Effect of the Invention The invention is as described above, and according to the invention of claim 1, from the state where the ON period is almost 0 to the (output voltage) / (input voltage) ratio of the chopper circuit, Since an interrupt signal that corrects the expected transient response can be injected to make it follow instantaneously, the output voltage when the load suddenly increases from the intermittent current condition where the load current is small and the transient response is poor. It is possible to reduce the transient fluctuation of.
また、請求項第２項の考案によれば、オン期間がほぼ
０のときでも第１の電圧制御アンプの出力はほぼ（出力
電圧）／（入力電圧）の比に保持されており、このため
負荷急増時には第２の電圧制御アンプの出力を除くこと
により速やかに出力電圧を確保でき、電流断続条件下か
ら負荷急増時のチョッパ回路の出力電圧の過渡変動を軽
減することができる。According to the second aspect of the invention, the output of the first voltage control amplifier is maintained at a ratio of (output voltage) / (input voltage) even when the ON period is almost 0. When the load is suddenly increased, the output voltage of the second voltage control amplifier is excluded, so that the output voltage can be secured promptly, and the transient fluctuation of the output voltage of the chopper circuit when the load is suddenly increased can be reduced under the intermittent current condition.
第１図は本考案の第１実施例による降圧チョッパ装置の
ブロック結線図、第２図（Ａ）〜（Ｅ）は第１図の装置
の各部の動作特性図、第３図（Ａ）は出力電流検出の一
例を示す線図、第３図（Ｂ）は出力電圧検出の一例を示
す線図、第４図は本考案の第２実施例による降圧チョッ
パ装置のブロック結線図、第５図（Ａ）〜（Ｄ）は第４
図の装置の各部の動作特性図、第６図は従来の降圧チョ
ッパ装置のブロック結線図、第７図（Ａ）〜（Ｄ）は第
６図の装置の動作特性図である。 １…バッテリ、２…トランジスタ、３…リアクトル、４
…ダイオード、５…コンデンサ、６…負荷、10…チョッ
パ回路、11a…第１の突合せ回路、11b…第２の突合せ回
路、12……電圧制御アンプ、13…第１の制御比較器、14
…ドライバ回路、20…動作制御回路、30…過渡応答調整
回路、31…第３の突合せ回路、32…第２の制御比較器、
33…アンドゲート、34…補正信号発生回路、35…電流変
化検出回路、40…過渡応答調整回路、41a…第１の電圧
制御アンプ、41b…第２の電圧制御アンプ、42…リミッ
タ回路である割算器、43…第３の突合せ回路、44…第４
の突合せ回路、45……第２の制御比較器、46…スイッ
チ。FIG. 1 is a block connection diagram of a step-down chopper device according to a first embodiment of the present invention, FIGS. 2 (A) to (E) are operation characteristic diagrams of respective parts of the device of FIG. 1, and FIG. 3 (A) is A diagram showing an example of output current detection, FIG. 3 (B) is a diagram showing an example of output voltage detection, FIG. 4 is a block connection diagram of a step-down chopper device according to a second embodiment of the present invention, and FIG. (A) ~ (D) is the fourth
FIG. 6 is an operation characteristic diagram of each part of the device in the figure, FIG. 6 is a block connection diagram of a conventional step-down chopper device, and FIGS. 7A to 7D are operation characteristic diagrams of the device in FIG. 1 ... Battery, 2 ... Transistor, 3 ... Reactor, 4
... diode, 5 ... capacitor, 6 ... load, 10 ... chopper circuit, 11a ... first matching circuit, 11b ... second matching circuit, 12 ... voltage control amplifier, 13 ... first control comparator, 14
... driver circuit, 20 ... operation control circuit, 30 ... transient response adjusting circuit, 31 ... third matching circuit, 32 ... second control comparator,
33 ... AND gate, 34 ... Correction signal generating circuit, 35 ... Current change detecting circuit, 40 ... Transient response adjusting circuit, 41a ... First voltage control amplifier, 41b ... Second voltage control amplifier, 42 ... Limiter circuit Divider, 43 ... Third matching circuit, 44 ... Fourth
Butt circuit, 45 ... Second control comparator, 46 ... Switch.
Claims (2)
期でオン，オフし、負荷に電流を供給するチョッパ回路
と、このチョッパ回路の出力電圧の設定出力電圧に対す
る偏差分に応じて前記スイッチング素子をオンオフ制御
する動作制御回路と、前記負荷に供給すべき電圧を補正
する電圧補正信号を得る過渡応答調整回路からなり、 前記過渡応答調整回路を、前記チョッパ回路の出力電流
の出力設定電流に対する偏差分を基に電流の断続条件を
検出する制御比較器と、前記出力電流の変化分を検出す
る電流変化検出回路と、この電流変化検出回路の検出信
号と前記制御比較器の検出信号を基に前記負荷に供給す
べき電力の過渡変化を補償する補正信号を前記動作制御
回路に入力する補正信号発生回路によって構成したこと
を特徴とする降圧チョッパ装置。1. A chopper circuit for supplying a current to a load by turning on / off a direct current by a switching element in a predetermined cycle, and turning on / off the switching element according to a deviation of an output voltage of the chopper circuit from a set output voltage. It comprises an operation control circuit for controlling and a transient response adjusting circuit for obtaining a voltage correction signal for correcting the voltage to be supplied to the load, and the transient response adjusting circuit is provided for calculating the deviation of the output current of the chopper circuit from the output set current. Based on the control comparator for detecting the intermittent condition of the current, the current change detection circuit for detecting the change amount of the output current, the load based on the detection signal of the current change detection circuit and the detection signal of the control comparator. A step-down converter characterized by comprising a correction signal generating circuit for inputting a correction signal for compensating for a transient change in the power to be supplied to the operation control circuit. Chopper device.
期でオンオフし、負荷に電流を供給するチョッパ回路
と、該チョッパ回路の出力電圧の設定出力電圧に対する
偏差分、前記チョッパ回路の入力電圧と設定出力電圧の
比および前記チョッパ回路の出力電流と設定出力電流の
偏差分に応じて前記負荷に供給すべき電力を調整する過
渡応答調整回路からなり、 前記過渡応答調整回路を、前記チョッパ回路の出力電圧
の設定出力電圧に対する偏差分を入力とする第１および
第２の電圧制御アンプと、前記チョッパ回路の入力電圧
と出力設定電圧の比に基づいて前記第１の電圧制御アン
プの出力信号にリミッタをかけるリミッタ回路と、前記
第１の電圧制御アンプの出力信号と発振器の出力信号を
入力とする突合わせ手段と、前記突合わせ手段と前記第
２の電圧制御アンプ間に接続されたスイッチ手段と、前
記チョッパ回路の出力電流と設定出力電流の偏差分に基
づいて前記チョッパ回路の電流断続条件を検出すると共
に前記出力電流が増加したとき前記スイッチ手段をオフ
にして前記第２の電圧制御アンプの出力信号をオフにす
る第２の制御比較器によって構成したことを特徴とする
降圧チョッパ回路。2. A chopper circuit for turning on / off a direct current at a predetermined cycle by a switching element to supply a current to a load, and a deviation amount of an output voltage of the chopper circuit from a set output voltage, an input voltage and a set output of the chopper circuit. The output voltage of the chopper circuit comprises a transient response adjustment circuit that adjusts the power to be supplied to the load according to the voltage ratio and the deviation between the output current of the chopper circuit and the set output current. Of the first and second voltage control amplifiers, each of which receives a deviation from the set output voltage of the input signal, and a limiter for the output signal of the first voltage control amplifier based on the ratio between the input voltage of the chopper circuit and the output set voltage. A limiter circuit, a matching means that receives the output signal of the first voltage control amplifier and an output signal of the oscillator, and the matching means. Switch means connected between the second voltage control amplifiers, and detecting a current interrupting condition of the chopper circuit based on a deviation between the output current of the chopper circuit and the set output current and increasing the output current. A step-down chopper circuit comprising a second control comparator which turns off the switch means to turn off the output signal of the second voltage control amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989075334U JPH0811055Y2 (en) | 1989-06-27 | 1989-06-27 | Step-down chopper device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989075334U JPH0811055Y2 (en) | 1989-06-27 | 1989-06-27 | Step-down chopper device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0314980U JPH0314980U (en) | 1991-02-14 |
| JPH0811055Y2 true JPH0811055Y2 (en) | 1996-03-29 |
Family
ID=31615823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989075334U Expired - Fee Related JPH0811055Y2 (en) | 1989-06-27 | 1989-06-27 | Step-down chopper device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0811055Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200527809A (en) * | 2004-01-27 | 2005-08-16 | Rohm Co Ltd | DC-AC converter, controller IC there for, and an electronic apparatus using such DC-AC converter |
| US20070201227A1 (en) * | 2006-02-27 | 2007-08-30 | Camp William O Jr | Light cable accessory for an electronic device and methods of operating a lighted cable accessory for an electronic device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63156585U (en) * | 1987-04-02 | 1988-10-13 |
-
1989
- 1989-06-27 JP JP1989075334U patent/JPH0811055Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0314980U (en) | 1991-02-14 |
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