JPH04304167A - Power supply - Google Patents
Power supplyInfo
- Publication number
- JPH04304167A JPH04304167A JP7008691A JP7008691A JPH04304167A JP H04304167 A JPH04304167 A JP H04304167A JP 7008691 A JP7008691 A JP 7008691A JP 7008691 A JP7008691 A JP 7008691A JP H04304167 A JPH04304167 A JP H04304167A
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- Japan
- Prior art keywords
- input current
- voltage
- power supply
- input
- chopper circuit
- Prior art date
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- 230000000694 effects Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
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Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は電源装置に係り、特にチ
ョッパ回路により交流電源からの入力電流の高調波成分
を抑制する手段に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply device, and more particularly to means for suppressing harmonic components of an input current from an AC power supply using a chopper circuit.
【０００２】0002
【従来の技術】従来の電源装置のブロック図を図５に示
す。この電源装置は、基本的には交流電源１の交流電圧
ＶＡＣをチョッパ回路２により直流電圧に変換し、コン
デンサ３の電圧を直流電圧ＶＤＣに一定制御し、負荷に
対して直流定電圧電源装置として機能するものである。2. Description of the Related Art A block diagram of a conventional power supply device is shown in FIG. This power supply device basically converts the AC voltage VAC of the AC power supply 1 into a DC voltage using the chopper circuit 2, and controls the voltage of the capacitor 3 to a constant DC voltage VDC, and acts as a DC constant voltage power supply device for the load. It's something that works.
【０００３】同図において前記チョッパ回路２は、チョ
−クコイル２１、スイッチング素子２２，２３、ダイオ
−ド２４〜２７で構成され、入力電流を低歪の正弦波状
にすると同時に昇圧チョッパとして機能し、直流電圧を
ＶＤＣに一定制御する。In the figure, the chopper circuit 2 is composed of a choke coil 21, switching elements 22, 23, and diodes 24 to 27, and functions as a step-up chopper while making the input current into a sinusoidal waveform with low distortion. The DC voltage is controlled to be constant at VDC.
【０００４】また前記スイッチング素子２３には交流電
圧ＶＡＣが正の期間に、スイッチング素子２２には交流
電圧ＶＡＣが負の期間に電流が流れるようにスイッチン
グ素子駆動部１５は両スイッチング素子２２，２３をオ
ンオフ制御する。[0004] Furthermore, the switching element drive unit 15 drives both switching elements 22 and 23 so that current flows through the switching element 23 during a period when the AC voltage VAC is positive, and current flows through the switching element 22 during a period when the AC voltage VAC is negative. Control on/off.
【０００５】そして直流電圧設定部５で設定された直流
電圧指令信号ｖｒと直流電圧検出部６で検出された直流
電圧ＶＤＣに比例した直流電圧信号ｖｄとは、直流電圧
誤差増幅部７で比較・増幅され、直流電圧誤差信号ｖｅ
となる。このｖｅは入力電流指令発生部１０で、ＡＣ電
圧検出トランス８およびフィルタ９により作られる交流
電圧ＶＡＣと同期した歪のない正弦波である入力電流基
準波形信号ｓと掛算されて、入力電流指令信号ｉｒとな
る。
従って、ｉｒはＶＡＣと同相でｖｅに比例した振幅をも
つ正弦波である。[0005]The DC voltage command signal vr set by the DC voltage setting unit 5 and the DC voltage signal vd proportional to the DC voltage VDC detected by the DC voltage detection unit 6 are compared and The amplified DC voltage error signal ve
becomes. This ve is multiplied by the input current reference waveform signal s, which is an undistorted sine wave synchronized with the AC voltage VAC generated by the AC voltage detection transformer 8 and the filter 9, in the input current command generation section 10, and is then multiplied by the input current reference waveform signal s. Becomes ir. Therefore, ir is a sine wave that is in phase with VAC and has an amplitude proportional to ve.
【０００６】このｉｒと電流検出器１１で検出された入
力電流ＩＡＣに比例した入力電流信号ｉａは入力電流誤
差増幅部１２で比較・増幅され入力電流誤差信号ｉｅと
なる。このｉｅと三角波発生部１３で生成される三角波
とが駆動パタ−ン発生部において比較され駆動パタ−ン
信号ｓｄとなる。このｓｄに基づいてスイッチング素子
駆動部１５は前述のようにスイッチング素子２２，２３
を駆動し、チョッパ回路２の入力電流ＩＡＣを正弦波状
に、また、出力直流電圧ＶＤＣを一定に制御する。[0006] This ir and an input current signal ia proportional to the input current IAC detected by the current detector 11 are compared and amplified by an input current error amplification section 12 to become an input current error signal ie. This ie and the triangular wave generated by the triangular wave generating section 13 are compared in the driving pattern generating section to form the driving pattern signal sd. Based on this sd, the switching element driving section 15 drives the switching elements 22 and 23 as described above.
The input current IAC of the chopper circuit 2 is controlled to be sinusoidal, and the output DC voltage VDC is controlled to be constant.
【０００７】[0007]
【発明が解決しようとする課題】図６は上記従来の電源
装置における入力電圧ＶＡＣ及び入力電流ＩＡＣの波形
図を示す。この図によれば入力電圧ＶＡＣの絶対値が零
から立ち上がる時点において入力電流ＩＡＣが正弦波と
はならず、高調波成分が多く含まれた歪電流となるとい
う問題があることが明らかである。FIG. 6 shows a waveform diagram of input voltage VAC and input current IAC in the conventional power supply device. According to this figure, it is clear that there is a problem in that the input current IAC does not become a sine wave at the time when the absolute value of the input voltage VAC rises from zero, but becomes a distorted current containing many harmonic components.
【０００８】本発明は斯かる従来技術の問題点に鑑み成
されたものであり、入力電圧ＶＡＣの絶対値が零から立
ち上がる時点においても入力電流ＩＡＣは正弦波電流が
流れるようにして入力電流ＩＡＣの高調波成分が極めて
少ない電源装置を得ることを目的とするものである。The present invention has been made in view of the problems of the prior art, and is designed to maintain the input current IAC so that a sine wave current flows even when the absolute value of the input voltage VAC rises from zero. The purpose of this invention is to obtain a power supply device with extremely low harmonic components.
【０００９】従来技術の問題点は交流電源１から見た電
源装置を図７に示す如く純抵抗Ｒと考えて入力電流を制
御することが原因である。即ち交流電源１の周波数にお
いて実際には前記チョッパ回路２のチョ−クコイル２１
に交流電流ＩＡＣを流すために該チョ−クコイル２１の
前後の電圧ＶＡＣとＶＡＣ’との間に位相差θが生じ（
図６参照）、その分入力電圧ＶＡＣの絶対値が零から立
ち上がる時点においてスイッチング素子２２および２３
にはＶＡＣと逆方向の電圧が印加されることになり電流
を制御することができなくなって歪を生じるのである。The problem with the prior art is that the input current is controlled by considering the power supply device as seen from the AC power supply 1 as a pure resistance R as shown in FIG. That is, at the frequency of the AC power supply 1, the choke coil 21 of the chopper circuit 2 actually
In order to cause the alternating current IAC to flow through the choke coil 21, a phase difference θ is generated between the voltages VAC and VAC' across the choke coil 21 (
(see FIG. 6), the switching elements 22 and 23 at the point when the absolute value of the input voltage VAC rises from zero.
Since a voltage in the opposite direction to VAC is applied to the VAC, the current cannot be controlled and distortion occurs.
【００１０】0010
【課題を解決するための手段】本発明は、交流電源と、
該交流電源に接続され入力される交流電圧を直流電圧に
変換するチョッパ回路と、該チョッパ回路に接続され前
記直流電圧を定電圧に制御する定電圧手段と、該定電圧
手段に接続される負荷とよりなり、前記チョッパ回路の
入力電流あるいは負荷の重さを検出して該チョッパ回路
の入力電圧に対する入力電流の位相を制御する制御手段
を設けたものである。[Means for Solving the Problems] The present invention provides an AC power supply,
A chopper circuit connected to the AC power supply and converting input AC voltage into DC voltage, a constant voltage means connected to the chopper circuit and controlling the DC voltage to a constant voltage, and a load connected to the constant voltage means. Therefore, a control means is provided for detecting the input current of the chopper circuit or the weight of the load and controlling the phase of the input current with respect to the input voltage of the chopper circuit.
【００１１】[0011]
【作用】上記構成では交流電源１から見た電源装置を図
４に示す如くインダクタンスＬと抵抗Ｒとの直列回路と
考えて入力電流を制御することを基本とする。この図４
の回路において交流電源電圧ＶＡＣをＥｍｓｉｎωｔ（
ωは交流電源の角周波数）とすると電流ＩＡＣは[Operation] In the above configuration, the input current is basically controlled by considering the power supply device as seen from the AC power supply 1 as a series circuit of an inductance L and a resistance R as shown in FIG. This figure 4
In the circuit, the AC power supply voltage VAC is expressed as Emsinωt(
If ω is the angular frequency of the AC power source), the current IAC is
【００
１２】00
12]
【数１】[Math 1]
【００１３】となる（このθはＶＡＣとＶＡＣ’との位
相差である）。(This θ is the phase difference between VAC and VAC').
【００１４】また、電源電圧ＶＡＣ，角周波数ω，イン
ダクタンスＬが一定であるときの入力電流ＩＡＣに対応
する抵抗ＲはFurthermore, when the power supply voltage VAC, angular frequency ω, and inductance L are constant, the resistance R corresponding to the input current IAC is
【００１５】[0015]
【数２】[Math 2]
【００１６】となるから、θは入力電流ＩＡＣあるいは
負荷の重さＲの関数として表すことができる。Therefore, θ can be expressed as a function of the input current IAC or the load weight R.
【００１７】そこで本発明はチョッパ回路の入力電流の
大きさあるいは負荷の重さにより該チョッパ回路の入力
電圧に対する入力電流の位相を制御手段によって制御す
ることでこのチョッパ回路の入力電流の高調波成分を抑
制する。Therefore, the present invention uses a control means to control the phase of the input current with respect to the input voltage of the chopper circuit according to the magnitude of the input current of the chopper circuit or the weight of the load, thereby reducing the harmonic components of the input current of the chopper circuit. suppress.
【００１８】このような制御を行うことによって、チョ
ッパ回路の入力電圧の絶対値が零から立ち上がる時点に
おいても該チョッパ回路を構成するスイッチング素子に
印加される電圧と等しい方向に電流を流すように電流が
制御されるから、このチョッパ回路の入力電圧の絶対値
が零から立ち上がる時点においても歪を生じず、入力電
流の高調波成分が極めて少なくなる。By performing such control, even when the absolute value of the input voltage of the chopper circuit rises from zero, the current is controlled so that the current flows in the same direction as the voltage applied to the switching elements constituting the chopper circuit. is controlled, distortion does not occur even when the absolute value of the input voltage of this chopper circuit rises from zero, and harmonic components of the input current are extremely reduced.
【００１９】[0019]
【実施例】本発明電源装置の一実施例のブロック図を図
１に示す。なお、従来と同一の機能を有する部分には同
一の符号をつけ説明を省略する。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a block diagram of an embodiment of the power supply device of the present invention. Note that parts having the same functions as those in the prior art are given the same reference numerals and explanations will be omitted.
【００２０】図１において、同期信号発生部１６は電源
電圧ＶＡＣが負から正に向かって零を通過する毎に同期
信号ＳＹＮＣを発生する。入力電流基準波形発生部１７
はこの同期信号ＳＹＮＣと該同期信号ＳＹＮＣから得ら
れる直流電圧誤差信号ｖｅとにより、入力電流ＩＡＣの
大きさにあるいは負荷の重さに応じた入力電圧ＶＡＣに
対しての位相差をもつ正弦波である入力電流基準波形信
号ｓを発生する部分であり、本発明の特徴となる部分で
ある。In FIG. 1, a synchronizing signal generating section 16 generates a synchronizing signal SYNC every time the power supply voltage VAC passes through zero from negative to positive. Input current reference waveform generator 17
is a sine wave having a phase difference with respect to the input voltage VAC according to the magnitude of the input current IAC or the weight of the load, due to this synchronization signal SYNC and the DC voltage error signal ve obtained from the synchronization signal SYNC. This is a part that generates a certain input current reference waveform signal s, and is a feature of the present invention.
【００２１】次に前記入力電流基準波形発生部１７の構
成例を図２に示す。図２において１７１は発振器，１７
２は制御ロジック，１７３はカウンタ，１７４はＡ／Ｄ
変換器，１７５はＲＯＭ，１７６はＤ／Ａ変換器である
。Next, an example of the configuration of the input current reference waveform generating section 17 is shown in FIG. In FIG. 2, 171 is an oscillator, 17
2 is control logic, 173 is a counter, 174 is A/D
Converter 175 is a ROM, and 176 is a D/A converter.
【００２２】以下前記入力電流基準波形発生部１７の中
身を説明するが、説明のために発振器１７１の周波数を
交流電源１の周波数の２１２倍，カウンタ１７３は１２
ビットバイナリカウンタ，Ａ／Ｄ変換器１７４の分解能
を４ビットとする。The contents of the input current reference waveform generating section 17 will be explained below. For the sake of explanation, the frequency of the oscillator 171 is set to 212 times the frequency of the AC power source 1, and the frequency of the counter 173 is set to 12 times.
The resolution of the bit binary counter and A/D converter 174 is assumed to be 4 bits.
【００２３】前記発振器１７１は入力電流基準波形発生
部１７の動作の基準となるクロック信号を発生するもの
である。制御ロジック１７２はクロック信号と同期信号
ＳＹＮＣによりカウンタ１７３，Ａ／Ｄ変換器１７４，
ＲＯＭ１７５，Ｄ／Ａ変換器１７６用の制御信号を生成
する。カウンタ１７３は交流電源１周期の間にカウント
値を０〜０ＦＦＦＨまで進め、これを下位アドレスとし
てＲＯＭ１７５に渡す。なおカウント値は制御信号によ
り同期信号ＳＹＮＣの発生と同期して０となる。Ａ／Ｄ
変換器１７４は入力電流ＩＡＣに比例する直流電圧誤差
信号ｖｅをディジタル値に変換し、これを上位アドレス
としてＲＯＭ１７５に渡す。ＲＯＭ１７５にはアドレス
の上位４ビットをｘＨ，下位１２ビットをＸＸＸＨとし
て、ｓｉｎ（２π・ｘＸＸＸＨ／４０９６−θｘ）のデ
−タが格納されている。ここでθｘは直流電圧誤差信号
ｖｅに比例す る入力電流ＩＡＣの大きさに対応する入
力電圧ＶＡＣと該入力電流ＩＡＣの位相差に相当する。
Ｄ／Ａ変換器１７６はＲＯＭ１７５から出力されたデ−
タをアナログ信号に変換し、入力電流基準波形信号ｓと
して出力する。The oscillator 171 generates a clock signal that serves as a reference for the operation of the input current reference waveform generating section 17. The control logic 172 uses a clock signal and a synchronization signal SYNC to control a counter 173, an A/D converter 174,
Control signals for the ROM 175 and D/A converter 176 are generated. The counter 173 advances the count value from 0 to 0FFFH during one cycle of the AC power supply, and passes this to the ROM 175 as a lower address. Note that the count value becomes 0 in synchronization with the generation of the synchronization signal SYNC by the control signal. A/D
The converter 174 converts the DC voltage error signal ve proportional to the input current IAC into a digital value, and passes this to the ROM 175 as an upper address. The ROM 175 stores data of sin (2π x XXXH/4096-θx), with the upper 4 bits of the address being xH and the lower 12 bits being XXXH. Here, θx corresponds to the phase difference between the input voltage VAC and the input current IAC, which corresponds to the magnitude of the input current IAC which is proportional to the DC voltage error signal ve. The D/A converter 176 receives the data output from the ROM 175.
converts the data into an analog signal and outputs it as an input current reference waveform signal s.
【００２４】以上の構成により入力電流基準波形発生部
１７は、同期信号ＳＹＮＣと直流電圧誤差信号ｖｅとに
より、入力電流ＩＡＣの大きさにあるいは負荷の重さに
応じた入力電圧ＶＡＣに対しての位相差θをもつ正弦波
である入力電流基準波形信号ｓを発生する。With the above configuration, the input current reference waveform generator 17 uses the synchronization signal SYNC and the DC voltage error signal ve to generate a response to the input voltage VAC according to the magnitude of the input current IAC or the weight of the load. An input current reference waveform signal s, which is a sine wave with a phase difference θ, is generated.
【００２５】これにより入力電流ＩＡＣはその大きさに
及び負荷の重さにより入力電圧ＶＡＣに対しての位相差
θをもって制御されるようになり、図３の曲線ＩＡＣに
示すように歪を生じず、入力電流ＩＡＣの高調波成分が
極めて少ないものとなる。[0025] As a result, the input current IAC can be controlled with a phase difference θ with respect to the input voltage VAC depending on its magnitude and the weight of the load, and no distortion occurs as shown by the curve IAC in Fig. 3. , the harmonic components of the input current IAC are extremely small.
【００２６】なお前記入力電圧ＶＡＣと入力電流ＩＡＣ
の位相差による力率の低下は位相差が５°としても０．
９９６以上であり、その影響は極めて小さい。Note that the input voltage VAC and input current IAC
Even if the phase difference is 5°, the power factor decreases due to the phase difference is 0.
996 or more, and its influence is extremely small.
【００２７】[0027]
【発明の効果】本発明は交流電源と、該交流電源に接続
され入力される交流電圧を直流電圧に変換するチョッパ
回路と、該チョッパ回路に接続され前記直流電圧を定電
圧に制御する定電圧手段と、該定電圧手段に接続される
負荷とよりなり、前記チョッパ回路の入力電流あるいは
負荷の重さを検出して該チョッパ回路の入力電圧に対す
る入力電流の位相を制御する制御手段を設けたものであ
るから、チョッパ回路の入力電流に含まれる高調波成分
が極めて少なくなり、電源に対する高調波成分による影
響が小さくなる効果が生まれる。Effects of the Invention The present invention provides an AC power source, a chopper circuit connected to the AC power source to convert input AC voltage into a DC voltage, and a constant voltage connected to the chopper circuit to control the DC voltage to a constant voltage. and a load connected to the constant voltage means, and includes a control means for detecting the input current of the chopper circuit or the weight of the load and controlling the phase of the input current with respect to the input voltage of the chopper circuit. Therefore, the harmonic components contained in the input current of the chopper circuit are extremely reduced, and the effect of the harmonic components on the power supply is reduced.
【図１】本発明電源装置の一実施例を示すブロック図で
ある。FIG. 1 is a block diagram showing an embodiment of a power supply device of the present invention.
【図２】図１の入力電流基準波形発生部の構成例を示す
図である。FIG. 2 is a diagram showing a configuration example of an input current reference waveform generating section in FIG. 1;
【図３】本発明電源装置の効果を示す波形図である。FIG. 3 is a waveform diagram showing the effects of the power supply device of the present invention.
【図４】本発明電源装置の考え方を説明する回路図であ
る。FIG. 4 is a circuit diagram explaining the concept of the power supply device of the present invention.
【図５】従来の電源装置を示すブロック図である。FIG. 5 is a block diagram showing a conventional power supply device.
【図６】従来の電源装置の問題点を説明する波形図であ
る。FIG. 6 is a waveform diagram illustrating problems with a conventional power supply device.
【図７】従来の電源装置の考え方を説明する回路図であ
る。FIG. 7 is a circuit diagram explaining the concept of a conventional power supply device.
１ 交流電源
２ チョッパ回路２１
チョークコイル２２，２３ スイッ
チング素子
２４〜２７ ダイオード
３ コンデンサ４
負荷
５ 直流電圧設定部６
直流電圧検出部７
直流電圧誤差増幅部８
ＡＣ電圧検出トランス９ フィ
ルタ
１０ 入力電流指令発生部１１
電流検出器
１２ 入力電流誤差増幅部１３
三角波発生部１４
駆動パターン発生部１５ スイッ
チング素子駆動部１６ 同期信号発
生部１７ 入力電流基準波形発生部
１７１ 発振器
１７２ 制御ロジック
１７３ カウンタ
１７４ Ａ／Ｄ変換器
１７５ ＲＯＭ
１７６ Ｄ／Ａ変換器1 AC power supply 2 Chopper circuit 21
Choke coils 22, 23 Switching elements 24 to 27 Diode 3 Capacitor 4
Load 5 DC voltage setting section 6
DC voltage detection section 7
DC voltage error amplification section 8
AC voltage detection transformer 9 Filter 10 Input current command generator 11
Current detector 12 Input current error amplification section 13
Triangular wave generator 14
Drive pattern generation section 15 Switching element drive section 16 Synchronization signal generation section 17 Input current reference waveform generation section 171 Oscillator 172 Control logic 173 Counter 174 A/D converter 175 ROM 176 D/A converter
Claims (1)
力される交流電圧を直流電圧に変換するチョッパ回路と
、該チョッパ回路に接続され前記直流電圧を定電圧に制
御する定電圧手段と、該定電圧手段に接続される負荷と
よりなり、前記チョッパ回路の入力電流あるいは負荷の
重さを検出して該チョッパ回路の入力電圧に対する入力
電流の位相を制御する制御手段を設けたことを特徴とす
る電源装置。1. An AC power supply, a chopper circuit connected to the AC power supply and converting an input AC voltage into a DC voltage, and a constant voltage means connected to the chopper circuit and controlling the DC voltage to a constant voltage. It is characterized by comprising a load connected to the constant voltage means, and a control means for detecting the input current of the chopper circuit or the weight of the load to control the phase of the input current with respect to the input voltage of the chopper circuit. power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7008691A JPH04304167A (en) | 1991-04-02 | 1991-04-02 | Power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7008691A JPH04304167A (en) | 1991-04-02 | 1991-04-02 | Power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04304167A true JPH04304167A (en) | 1992-10-27 |
Family
ID=13421379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7008691A Pending JPH04304167A (en) | 1991-04-02 | 1991-04-02 | Power supply |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04304167A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008066998A2 (en) | 2006-11-29 | 2008-06-05 | Sunpower, Inc. | Electronic controller matching engine power to alternator power and maintaining engine frequency for a free-piston stirling engine driving a linear alternator |
| JP2011142726A (en) * | 2010-01-06 | 2011-07-21 | Logah Technology Corp | Interleave bridgeless power factor corrector and method of controlling the same |
-
1991
- 1991-04-02 JP JP7008691A patent/JPH04304167A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008066998A2 (en) | 2006-11-29 | 2008-06-05 | Sunpower, Inc. | Electronic controller matching engine power to alternator power and maintaining engine frequency for a free-piston stirling engine driving a linear alternator |
| EP2087204A2 (en) * | 2006-11-29 | 2009-08-12 | Sunpower, Inc. | Electronic controller matching engine power to alternator power and maintaining engine frequency for a free-piston stirling engine driving a linear alternator |
| EP2087204A4 (en) * | 2006-11-29 | 2009-11-11 | Sunpower Inc | Electronic controller matching engine power to alternator power and maintaining engine frequency for a free-piston stirling engine driving a linear alternator |
| JP2011142726A (en) * | 2010-01-06 | 2011-07-21 | Logah Technology Corp | Interleave bridgeless power factor corrector and method of controlling the same |
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