JPH0646535A - Charger - Google Patents

Charger

Info

Publication number
JPH0646535A
JPH0646535A JP15592192A JP15592192A JPH0646535A JP H0646535 A JPH0646535 A JP H0646535A JP 15592192 A JP15592192 A JP 15592192A JP 15592192 A JP15592192 A JP 15592192A JP H0646535 A JPH0646535 A JP H0646535A
Authority
JP
Japan
Prior art keywords
current
circuit
input
battery
switch
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
Application number
JP15592192A
Other languages
Japanese (ja)
Inventor
Tsutomu Kikuchihara
務 菊地原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tamura Corp
Original Assignee
Tamura Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tamura Corp filed Critical Tamura Corp
Priority to JP15592192A priority Critical patent/JPH0646535A/en
Publication of JPH0646535A publication Critical patent/JPH0646535A/en
Pending legal-status Critical Current

Links

Landscapes

  • Dc-Dc Converters (AREA)
  • Power Conversion In General (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Rectifiers (AREA)
  • Control Of Voltage And Current In General (AREA)

Abstract

PURPOSE:To improve harmonic distortion in a capacitor input type rectifier circuit by employing a switching power supply at a power converting section of a boosting charger. CONSTITUTION:The charger comprises an AC input rectifier D1, a switch SW1 performing high frequency switching of rectified pulsating current, a transformer T1 transmitting the pulsating primary power to the secondary, rectifying/ smoothing circuits D2, D3, C1, CO for rectifying/smoothing the secondary power to produce DC current for charging a battery, a charge control circuit 3 producing a charging current control command, a current detecting circuit 2, and a circuit 1 for controlling the switch SW1 with a predetermined frequency and pulse width. Furthermore, full-wave rectified pulsating AC input waveform is subjected to high frequency switching with a pulse width limited by a current detecting circuit 2 thus widening the conduction angle of input current, suppressing harmonic distortion, and improving power factor.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は1C以上の充電々流で電
池を充電する充電器において、高調波歪を少なくし、力
率を改善した充電器に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery charger which charges a battery with a charging current of 1 C or more, in which harmonic distortion is reduced and the power factor is improved.

【0002】[0002]

【従来の技術】従来技術における例を図3に基づいて説
明する。図において、D1はAC入力を全波整流する全
波整流器、C2は平滑コンデンサ、SW1は整流された
波形をスイッチングするスイッチ、T1はトランス、D
2,D3はトランスT1の二次側の整流ダイオード、C
1は平滑コンデンサ、CHはチョーク、4は電池であ
る。1はスイッチSW1をPWM制御する制御回路であ
る。5は高周波フィルタ回路であり、3は充電制御回路
であり、制御回路1に対して充電々流の制御指令を出す
と共に、電池4の電圧を検出する。2は電流検出回路で
あり、充電々流を検出する。
2. Description of the Related Art An example of the prior art will be described with reference to FIG. In the figure, D1 is a full-wave rectifier for full-wave rectifying the AC input, C2 is a smoothing capacitor, SW1 is a switch for switching the rectified waveform, T1 is a transformer, D
2, D3 are rectifier diodes on the secondary side of the transformer T1, C
Reference numeral 1 is a smoothing capacitor, CH is a choke, and 4 is a battery. Reference numeral 1 is a control circuit for PWM controlling the switch SW1. Reference numeral 5 is a high-frequency filter circuit, 3 is a charge control circuit, which issues a control command for the charge flow to the control circuit 1 and detects the voltage of the battery 4. Reference numeral 2 is a current detection circuit, which detects a charging flow.

【0003】AC入力を整流器1で整流し、平滑コンデ
ンサC2で平滑された一次側の直流電圧は、制御回路1
により設定された周波数及びパルス幅でスイッチSW1
によりパルス化され、トランスT1を介して二次側へ伝
送される。二次側ではこの波形を整流ダイオードD2,
D3、チョークCH、平滑コンデンサC1により直流化
された充電々流で電池4を充電する。充電々流は、充電
制御回路3及び電流検出回路2からの指令に基づいて制
御回路1がスイッチSW1を制御することによって制御
される。
The DC voltage on the primary side, which is obtained by rectifying the AC input by the rectifier 1 and smoothed by the smoothing capacitor C2, is used in the control circuit 1.
Switch SW1 with the frequency and pulse width set by
Is pulsed by and transmitted to the secondary side through the transformer T1. On the secondary side, this waveform is rectified by a rectifier diode D2,
The battery 4 is charged by the charging flow that is DC-converted by D3, the choke CH, and the smoothing capacitor C1. The charging flow is controlled by the control circuit 1 controlling the switch SW1 based on commands from the charging control circuit 3 and the current detection circuit 2.

【0004】[0004]

【発明が解決しようとする課題】しかし、従来例におけ
る充電器では、AC入力の整流回路がコンデンサインプ
ットであるために、図4に示されているように、整流電
圧VINの波形はリップル含有率が大幅に改善されるのに
反して、入力電流IINの通流角が狭くピーク値の大きな
パルス状の波形となり、高調波歪が大きく力率も例えば
0.6〜0.7と低下する。従って、充電器が大型であ
る程、他の電子機器や電力系統に与える悪影響は大きい
という課題がある。
However, in the charger in the conventional example, since the AC input rectifier circuit is a capacitor input, as shown in FIG. 4, the waveform of the rectified voltage V IN contains ripples. On the other hand, the pulse ratio is greatly improved, but the input current I IN has a narrow conduction angle and a large peak value, resulting in a pulse-like waveform with high harmonic distortion and a low power factor of, for example, 0.6 to 0.7. To do. Therefore, there is a problem that the larger the charger, the greater the adverse effect on other electronic devices and the power system.

【0005】本発明はこのような点に鑑みてなされたも
のであり、他の電子機器や電力系統に悪影響を与えるこ
とのない高調波歪を小さくし、力率の改善を施した充電
器を提供することを目的とする。
The present invention has been made in view of the above circumstances, and provides a charger with reduced harmonic distortion and improved power factor without adversely affecting other electronic devices and power systems. The purpose is to provide.

【0006】[0006]

【課題を解決するための手段】上記課題を解決するため
に本発明の充電器は、1C以上の充電々流で電池を充電
し、充電の制御を電池電圧を検出して行う充電器におい
て、AC入力波形を全波整流する整流器と、整流した脈
流を高周波でスイッチングするスイッチと、前記スイッ
チでパルス化された一次側電力を二次側に伝送するトラ
ンスと、二次側電力を整流・平滑して電池を充電する直
流電流を作り出す整流・平滑回路と、電池電圧を検出し
て充電々流の制御指令を出す充電制御回路と、電流を検
出する電流検出回路と、前記スイッチを規定の周波数と
パルス幅で制御する制御回路とを備え、全波整流された
AC入力波形の脈流を高周波でスイッチングすることに
より入力電流の通流角を広くし高調波歪を少なくし、力
率の改善を施したことに特徴を有している。
In order to solve the above problems, the battery charger of the present invention is a battery charger that charges a battery with a charging current of 1 C or more and controls charging by detecting the battery voltage. A rectifier for full-wave rectifying the AC input waveform, a switch for switching the rectified pulsating flow at a high frequency, a transformer for transmitting the primary side power pulsed by the switch to the secondary side, and a rectifier for the secondary side power. A rectifying / smoothing circuit that produces a DC current that smoothes and charges the battery, a charge control circuit that detects the battery voltage and issues a control command for the charge flow, a current detection circuit that detects the current, and the switch A control circuit for controlling the frequency and the pulse width is provided, and the pulsating flow of the full-wave rectified AC input waveform is switched at a high frequency to widen the conduction angle of the input current to reduce the harmonic distortion and reduce the power factor. Improved It has a feature to the door.

【0007】[0007]

【作用】上記構成による本発明の充電器では、AC入力
を整流した後に、脈流を平滑するためのコンデンサを使
用していない。このために、AC入力波形と整流後の波
形が略同一であり、AC入力電流の通流角はコンデンサ
インプット形整流回路の通流角に比べ格段に広がり、高
調波歪は少なくなり、その結果この充電器による力率が
向上する。
In the charger of the present invention having the above structure, no capacitor is used for smoothing the pulsating current after rectifying the AC input. For this reason, the AC input waveform and the waveform after rectification are substantially the same, the conduction angle of the AC input current is significantly wider than the conduction angle of the capacitor input type rectifier circuit, and harmonic distortion is reduced. The power factor of this charger is improved.

【0008】[0008]

【実施例】以下、本発明の一実施例を図1に基づいて説
明する。図において、図3と同一の符号を付したものは
それぞれ同一の要素を示しており、説明を省略する。二
次側電力を整流・平滑して電池を充電する直流電流を作
り出す整流・平滑回路は、整流ダイオードD2,D3、
チョークCH、平滑コンデンサC1から構成されてい
る。従来例と本発明の実施例との相違は、AC入力を整
流した後の脈流を平滑するための平滑コンデンサC2を
使用していないことである。なお、図におけるVBATT
電池4の電圧であり、VL はチョークCHの電圧降下
分、VD は整流器D2の電圧降下分である。VINは整流
電圧、IIN、IIN’は入力電流である。これらの電圧、
電流は後述する図2で説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In the figure, the elements denoted by the same reference numerals as those in FIG. 3 indicate the same elements, and the description thereof will be omitted. The rectifying / smoothing circuit that rectifies / smooths the secondary power to generate a direct current for charging the battery is composed of rectifying diodes D2, D3,
It is composed of a choke CH and a smoothing capacitor C1. The difference between the conventional example and the embodiment of the present invention is that the smoothing capacitor C2 for smoothing the pulsating current after rectifying the AC input is not used. In the figure, V BATT is the voltage of the battery 4, VL is the voltage drop of the choke CH, and V D is the voltage drop of the rectifier D2. V IN is a rectified voltage, and I IN and I IN 'are input currents. These voltages,
The electric current will be described later with reference to FIG.

【0009】通常のコンバータによる直流電源の場合に
は、コンデンサインプットにより出来るだけ整流後のリ
ップル分の少ない直流にする必要がある。これは直流出
力電圧の安定化と共にAC入力波形に瞬断が発生した場
合でも、安定したエネルギーを二次側に送る必要がある
ので、コンデンサにエネルギーを貯めておく。これに対
して充電器の場合は、電池を充電する充電々流の瞬断を
余り考慮する必要がない。
In the case of a direct-current power source using an ordinary converter, it is necessary to use a capacitor input to make a direct current with a small amount of ripple after rectification. This is because the stable energy needs to be sent to the secondary side even when the DC output voltage is stabilized and a momentary interruption occurs in the AC input waveform, so the energy is stored in the capacitor. On the other hand, in the case of the charger, it is not necessary to take into consideration the instantaneous interruption of the charging flow for charging the battery.

【0010】次に、図2に基づいて入力電流の通流角に
ついて説明する。トランスT1のトランスレシオをNと
すると、充電々流が流れる時の整流電圧VINの閾電圧V
A は、VA =N・VIN>VBATT+VD +VL となる。電
圧VA 以上の整流電圧VINの時に流れる入力電流IIN
IN’の通流角は図に示すように、コンデンサインプッ
ト形整流回路の通流角に比べ格段に広がり、高調波歪は
少なくなり、その結果この充電器による力率が向上す
る。
Next, the conduction angle of the input current will be described with reference to FIG. Assuming that the transformer ratio of the transformer T1 is N, the threshold voltage V IN of the rectified voltage V IN at the time when a charging flow flows.
A becomes V A = N · V IN > V BATT + V D + V L. An input current I IN that flows when the rectified voltage V IN is higher than the voltage V A ,
As shown in the figure, the conduction angle of I IN 'is significantly wider than the conduction angle of the capacitor input type rectifier circuit, the harmonic distortion is reduced, and as a result, the power factor of this charger is improved.

【0011】[0011]

【発明の効果】以上説明したように、本発明の充電器
は、AC入力波形を全波整流する整流器と、整流した脈
流を高周波でスイッチングするスイッチと、前記スイッ
チでパルス化された一次側電力を二次側に伝送するトラ
ンスと、二次側電力を整流・平滑して電池を充電する直
流電流を作り出す整流・平滑回路と、電池電圧を検出し
て充電々流の制御指令を出す充電制御回路と、電流を検
出する電流検出回路と、前記スイッチを規定の周波数と
パルス幅で制御する制御回路とを備え、全波整流された
AC入力波形の脈流を高周波でスイッチングすることに
より入力電流の通流角を広くして高調波歪を少なくし、
力率の改善を施したので、この充電器の使用による力率
の低下はなく、他の電子機器や電力系統に悪影響を与え
ない。
As described above, the battery charger according to the present invention has a rectifier for full-wave rectifying an AC input waveform, a switch for switching the rectified pulsating flow at a high frequency, and a primary side pulsed by the switch. A transformer that transmits electric power to the secondary side, a rectifying / smoothing circuit that rectifies and smoothes the secondary electric power to create a direct current that charges the battery, and a charging that detects the battery voltage and issues a control command for charging double current. A control circuit, a current detection circuit that detects a current, and a control circuit that controls the switch with a specified frequency and pulse width, and input by switching the pulsating current of a full-wave rectified AC input waveform at a high frequency Widening the current flow angle to reduce harmonic distortion,
Since the power factor has been improved, there is no reduction in power factor due to the use of this charger, and it will not adversely affect other electronic devices and power systems.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例における力率の改善を施した
充電器の回路図である。
FIG. 1 is a circuit diagram of a charger with improved power factor according to an embodiment of the present invention.

【図2】本発明の一実施例における入力電流の説明図で
ある。
FIG. 2 is an explanatory diagram of an input current according to an embodiment of the present invention.

【図3】従来例における充電器の回路図である。FIG. 3 is a circuit diagram of a charger in a conventional example.

【図4】従来例における入力電流の説明図である。FIG. 4 is an explanatory diagram of an input current in a conventional example.

【符号の説明】[Explanation of symbols]

C1,C2 平滑コンデンサ CH チョーク D1 整流器 D2,D3 整流ダイオード SW1 スイッチ T1 トランス 1 制御回路 2 電流検出回路 3 充電制御回路 4 電池 5 高周波フィルタ回路 C1, C2 Smoothing capacitor CH Choke D1 Rectifier D2, D3 Rectifier diode SW1 switch T1 Transformer 1 Control circuit 2 Current detection circuit 3 Charge control circuit 4 Battery 5 High frequency filter circuit

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 FI 技術表示箇所 H02M 7/21 Z 9180−5H ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI Technical indication H02M 7/21 Z 9180-5H

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 1C以上の充電々流で電池を充電し、充
電の制御を電池電圧を検出して行う充電器において、 AC入力波形を全波整流する整流器と、 整流した脈流を高周波でスイッチングするスイッチと、 前記スイッチでパルス化された一次側電力を二次側に伝
送するトランスと、 二次側電力を整流・平滑して電池を充電する直流電流を
作り出す整流・平滑回路と、 電池電圧を検出して充電々流の制御指令を出す充電制御
回路と、電流を検出する電流検出回路と、 前記スイッチを規定の周波数とパルス幅で制御する制御
回路とを備え、 全波整流されたAC入力波形の脈流を高周波でスイッチ
ングすることにより入力電流の通流角を広くし高調波歪
を少なくし、力率の改善を施したことを特徴とする充電
器。
1. A charger that charges a battery with a charging current of 1 C or more and controls charging by detecting the battery voltage, and a rectifier for full-wave rectifying an AC input waveform and a rectified pulsating current at high frequency. A switch for switching, a transformer for transmitting the primary side power pulsed by the switch to the secondary side, a rectifying / smoothing circuit for rectifying / smoothing the secondary side power to generate a direct current for charging the battery, and a battery A full-wave rectified circuit provided with a charge control circuit that detects a voltage and issues a control command for a charge flow, a current detection circuit that detects a current, and a control circuit that controls the switch with a specified frequency and pulse width. A charger characterized in that the pulsating current of the AC input waveform is switched at a high frequency to widen the conduction angle of the input current, reduce harmonic distortion, and improve the power factor.
JP15592192A 1992-05-22 1992-05-22 Charger Pending JPH0646535A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15592192A JPH0646535A (en) 1992-05-22 1992-05-22 Charger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15592192A JPH0646535A (en) 1992-05-22 1992-05-22 Charger

Publications (1)

Publication Number Publication Date
JPH0646535A true JPH0646535A (en) 1994-02-18

Family

ID=15616425

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15592192A Pending JPH0646535A (en) 1992-05-22 1992-05-22 Charger

Country Status (1)

Country Link
JP (1) JPH0646535A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2738416A1 (en) * 1995-08-31 1997-03-07 Lacme Battery charger providing starting assistance for motor vehicle
WO1998015997A1 (en) * 1996-10-10 1998-04-16 Chartec Laboratories A/S A digitally controlled switch mode power supply for charging rechargeable batteries
KR100317827B1 (en) * 1999-04-03 2001-12-22 권영한 Apparatus for charging capacitor
KR20170133481A (en) * 2016-02-05 2017-12-05 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 Terminal charging method, terminal charging system and power adapter
KR20170139614A (en) * 2016-02-05 2017-12-19 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 Terminal charging method and system and power adapter
JP2018532358A (en) * 2016-07-26 2018-11-01 グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッド Adapter and charge control method
KR20190084323A (en) * 2017-09-22 2019-07-16 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 POWER SUPPLY CIRCUIT, POWER SUPPLY DEVICE AND CONTROL METHOD,

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03203527A (en) * 1989-12-27 1991-09-05 Tohoku Electric Power Co Inc Switching power supply type charger

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03203527A (en) * 1989-12-27 1991-09-05 Tohoku Electric Power Co Inc Switching power supply type charger

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2738416A1 (en) * 1995-08-31 1997-03-07 Lacme Battery charger providing starting assistance for motor vehicle
WO1998015997A1 (en) * 1996-10-10 1998-04-16 Chartec Laboratories A/S A digitally controlled switch mode power supply for charging rechargeable batteries
KR100317827B1 (en) * 1999-04-03 2001-12-22 권영한 Apparatus for charging capacitor
KR20170139614A (en) * 2016-02-05 2017-12-19 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 Terminal charging method and system and power adapter
KR20170134655A (en) * 2016-02-05 2017-12-06 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 Charging system for terminal, charging method and power adapter
KR20170139075A (en) * 2016-02-05 2017-12-18 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 Terminal charging method and system and power adapter
US10651677B2 (en) 2016-02-05 2020-05-12 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Charging system and charging method, and power adapter and switching-mode power supply
JP2018517387A (en) * 2016-02-05 2018-06-28 グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッド Charging system for terminal, charging method and power adapter
KR20170133481A (en) * 2016-02-05 2017-12-05 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 Terminal charging method, terminal charging system and power adapter
US10348119B2 (en) 2016-02-05 2019-07-09 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Adapter and method for charging control
US11070076B2 (en) 2016-02-05 2021-07-20 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Charging method, charging system, and power adapter
US10461568B2 (en) 2016-02-05 2019-10-29 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Charging system, charging method, and power adapter
US10819134B2 (en) 2016-02-05 2020-10-27 Guangdong Oppo Mobile Telecommuncations Corp., Ltd. Adapter and method for charging control
JP2018532358A (en) * 2016-07-26 2018-11-01 グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッド Adapter and charge control method
JP2019216602A (en) * 2016-07-26 2019-12-19 オッポ広東移動通信有限公司 Adapter and charging control method
JP2020504589A (en) * 2017-09-22 2020-02-06 オッポ広東移動通信有限公司 Power supply circuit, power supply device and control method
US10819246B2 (en) 2017-09-22 2020-10-27 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Power supply circuit based on feedback signal, power supply device and control method
KR20190084323A (en) * 2017-09-22 2019-07-16 광동 오포 모바일 텔레커뮤니케이션즈 코포레이션 리미티드 POWER SUPPLY CIRCUIT, POWER SUPPLY DEVICE AND CONTROL METHOD,
US11469609B2 (en) 2017-09-22 2022-10-11 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Power supply circuit, power supply device and control method

Similar Documents

Publication Publication Date Title
US6344986B1 (en) Topology and control method for power factor correction
US7489116B2 (en) Power factor correction control circuit
EP0658968B1 (en) Switching regulator
CN108539984B (en) PFWM control system of switching power supply circuit
JP2006067730A (en) Power factor improving circuit
JPH0523040B2 (en)
JPH06209574A (en) Power supply circuit
US5822198A (en) Single stage power converter and method of operation thereof
JPH0646535A (en) Charger
EP1014550A2 (en) An AC/DC converter
US6697269B2 (en) Single-stage converter compensating power factor
EP0665632B1 (en) Switching power source apparatus
KR100386865B1 (en) Power circuit with smoothing choke coil inductance varying circuit
JPH0759342A (en) Switching power supply
JP3463278B2 (en) Power supply
JP3096211B2 (en) Switching regulator
JP4715985B2 (en) Switching power supply
JPH06284713A (en) Switching power-supply circuit
JPH0591744A (en) Switching regulator
JP3263709B2 (en) Switching power supply
JP3339558B2 (en) Power converter
JP2637646B2 (en) DC power supply circuit
JPH10127048A (en) Power conversion device
Reddig Optimization of the input and output stages in high efficiency power supplies
JPH09117139A (en) Switching power supply circuit