JPH03284200A - Control device for ac generator - Google Patents

Control device for ac generator

Info

Publication number
JPH03284200A
JPH03284200A JP2080611A JP8061190A JPH03284200A JP H03284200 A JPH03284200 A JP H03284200A JP 2080611 A JP2080611 A JP 2080611A JP 8061190 A JP8061190 A JP 8061190A JP H03284200 A JPH03284200 A JP H03284200A
Authority
JP
Japan
Prior art keywords
power transistor
voltage
transistor
current
initial excitation
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
JP2080611A
Other languages
Japanese (ja)
Inventor
Shiro Iwatani
史朗 岩谷
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric 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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP2080611A priority Critical patent/JPH03284200A/en
Publication of JPH03284200A publication Critical patent/JPH03284200A/en
Pending legal-status Critical Current

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  • Control Of Eletrric Generators (AREA)

Abstract

PURPOSE:To suppress switching surge voltage by connecting the base resistor of a power transistor to an auxiliary output of a rectifier. CONSTITUTION:A power transistor 307 is connected at its base to a resistor 306 that is connected to an auxiliary rectifier output 202. When the voltage to the rectifier output 202 is cut off, the base current is not instantly cut off because a negative-feedback capacitor 305 discharges a gradually decreasing current to the base. Therefore, the power transistor is gradually brought into the cut-off state, resulting in delay of decrease in the initial excitation current from a battery 4. In other words, the switching rate of the power transistor is decreased to supply a field coil 102 with an intermittent initial excitation current.

Description

【発明の詳細な説明】 [産業上の利用分野] この発明は、交流発電機の制御装置、特に車両用交流発
電機のスイッチンクサージ電圧を抑えることかできる制
御装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a control device for an alternating current generator, and particularly to a control device capable of suppressing switching surge voltage of an alternator for a vehicle.

[従来の技術] 第2図は、交流発電機およびその従来の制御装置を示す
回路図である。図において、(1)は交流発電機例えは
車両用交流発電機であって、′例えば星形結線された3
用型機子コイル<1.01)および界磁コイル(102
)を有している。(2)は整流器であって、交流発電機
(1)の電機子コイル(101,)の一端に接続された
入力端、主整流出力端(201) 、補助整流出力端(
202) 、接地端(203)を有すると共に、入力端
とそれぞれ主整流出力端(201) 、補助整流出力端
(202) 、接地端(203)の間に接続されたダイ
オードを有している。(3)は電圧調整器てあって、整
流器(2)の補助整流出力端(202)と接地の間で直
列に接続された電圧検出用分圧抵抗(301)および(
302)、これら分圧抵抗(301)と(302)の接
続点にカソードが接続されたツェナーダイオド(303
)−このツェナーダイオード(303)のアノードにベ
ースが接続されかつエミッタが接地された制御用トラン
ジスタ(304) 、この制御用トランジスタ(304
)のヘ−ス、コレクタ間に接続された負帰還コンデンサ
(305) 、制御用1〜ランジスタ(304)のコレ
クタと電源端子Aの間に接続されたベース電流供給用抵
抗(306)−制御用トランジスタ(304)のコレク
タにベースが接続され、エミッタが接地されかつコレク
タが交流発電機(1)の界磁コイル(102)を介して
整流器(2)の補助出力端(202)に接続されたパワ
ートランジスタ(307)、このパワートランジスタ(
307)のコレクタ、補助整流出力端(202)間にア
ノード、カソードが接続されたサージ吸収用ダイオード
(308) 、電源端子Aにコレクタが接続された開閉
素子例えば界磁コイル(102)の初期励磁用トランジ
スタ(309) 、この初期励磁用トランジスタ(30
9)のエミッタ、補助整流出力端(202)間にアノー
ド、カソードが接続された逆流阻止用ダイオード(31
0) 、並びに初期励磁用トランジスタ(309)のベ
ースに接続されて一定周期の断続信号を発生する発振器
(311)をしている。(4)は整流器(2)の主整流
出力端(201)と接地の間に接続された蓄電池、そし
て(5)はこの蓄電池(4)の正端子と電圧調整器(3
)の電源端子Aとの間に接続されたキースイッチである
。なお、整流器(2)、電圧調整器(3)、蓄電池(4
)およびキースイッチ(5)は従来の制御装置を構成す
る。
[Prior Art] FIG. 2 is a circuit diagram showing an alternator and its conventional control device. In the figure, (1) is an alternator, for example an alternator for a vehicle;
type machine coil <1.01) and field coil (102
)have. (2) is a rectifier, which has an input end connected to one end of the armature coil (101,) of the alternator (1), a main rectifier output end (201), and an auxiliary rectifier output end (
202), a ground end (203), and diodes connected between the input end and the main rectifier output end (201), auxiliary rectifier output end (202), and ground end (203), respectively. (3) is a voltage regulator, which includes a voltage detecting voltage dividing resistor (301) and (
302), a Zener diode (303) whose cathode is connected to the connection point of these voltage dividing resistors (301) and (302).
) - a control transistor (304) whose base is connected to the anode of this Zener diode (303) and whose emitter is grounded;
), a negative feedback capacitor (305) connected between the base current supply resistor (306) connected between the collector of the transistor (304) and the collector of the control transistor (304), and a base current supply resistor (306) for control The base was connected to the collector of the transistor (304), the emitter was grounded, and the collector was connected to the auxiliary output terminal (202) of the rectifier (2) via the field coil (102) of the alternator (1). Power transistor (307), this power transistor (
A surge absorbing diode (308) whose anode and cathode are connected between the collector of 307) and the auxiliary rectifier output end (202), and a switching element whose collector is connected to the power terminal A, such as the initial excitation of the field coil (102). transistor (309), this initial excitation transistor (30
A backflow blocking diode (31) whose anode and cathode are connected between the emitter of 9) and the auxiliary rectifier output end (202).
0), and an oscillator (311) which is connected to the base of the initial excitation transistor (309) and generates an intermittent signal with a constant period. (4) is a storage battery connected between the main rectification output terminal (201) of the rectifier (2) and ground, and (5) is the positive terminal of this storage battery (4) and the voltage regulator (3).
) is a key switch connected between the power supply terminal A and the power supply terminal A. In addition, a rectifier (2), a voltage regulator (3), a storage battery (4)
) and the key switch (5) constitute a conventional control device.

このように構成された従来の制御装置において、キース
イッチ(5)をONにすると、蓄電池(4)から、発振
器(311)によって断続制御されている初期励磁用ト
ランジスタ(309)および逆流阻止用ダイオード(3
10)を通して界磁コイル(102)に断続する初期励
磁電流が流れる。この初期励磁電流て界磁コイル(10
2)が励磁されると、交流発電機(1)は駆動されて発
電を開始し、その出力電圧を上昇させる。しかしながら
、この出力電圧が所定値よりも低い時には、ツェナーダ
イオ−)’ (303)および制御用トランジスタ(3
04)は不導通てあり、パワートランジスタ(307)
は導通する。そのため、界磁コイル(102)に流れる
初期励磁電流が増加し、交流発電機(1)の出力電圧は
更に上昇する。そして出力電圧が所定値を超えると、ツ
ェナーダイオド(303)および制御用トランジスタ(
304)は導通し、パワートランジスタ(307)は不
導通になる。
In the conventional control device configured as described above, when the key switch (5) is turned on, the initial excitation transistor (309) and the reverse current blocking diode, which are intermittently controlled by the oscillator (311), are emitted from the storage battery (4). (3
10), an intermittent initial excitation current flows to the field coil (102). This initial excitation current is used for the field coil (10
2) is excited, the alternator (1) is driven and starts generating electricity, increasing its output voltage. However, when this output voltage is lower than a predetermined value, the Zener diode (303) and the control transistor (303)
04) is non-conductive, and the power transistor (307)
is conductive. Therefore, the initial excitation current flowing through the field coil (102) increases, and the output voltage of the alternator (1) further increases. When the output voltage exceeds a predetermined value, the Zener diode (303) and the control transistor (
304) becomes conductive, and the power transistor (307) becomes non-conductive.

その結果、界磁電流は減少し、出力電圧も低下する。以
上の動作を繰り返すことにより発電機出力電圧は電圧調
整器(3)によって所定値に調整される。なお、交流発
電機(1)の発電運転中は、蓄電池電池と補助整流出力
端電圧がほぼ等しくなるために、初期励磁用トランジス
タ(309)に電流は実質的に遮断される。また、負帰
還コンデンサ(305)はパワートランジスタ(307
)の動作を遅延させてそのスイッチング動作を安定化さ
せる。サージ吸収用ダイオード(308)は界磁コイル
(102)に生じるサージを吸収する。
As a result, the field current decreases and the output voltage also decreases. By repeating the above operations, the generator output voltage is adjusted to a predetermined value by the voltage regulator (3). Note that during power generation operation of the alternating current generator (1), since the storage battery battery and the auxiliary rectifier output end voltages are approximately equal, current is substantially cut off to the initial excitation transistor (309). In addition, the negative feedback capacitor (305) is connected to the power transistor (307).
) to stabilize its switching operation. The surge absorbing diode (308) absorbs the surge generated in the field coil (102).

[発明が解決しようとする課題] 従来の制御装置では、キースイッチ(5)ON時の初期
励磁状態において、初期励磁用トランジスタ(309)
によって界磁コイル(102)に断続される初期励磁電
流が流れるが、パワートランジスタ(307)は、ベー
ス電流供給用抵抗(306)が電源端子Aに接続されて
いるため初期励磁用トランジスタ(309)の、発振器
(311)による断続制御にかかわらず、常に導通状態
となっている。従って、蓄電池(4)より供給される断
続初期励磁電流の電流変化率(dI/dt)は、初期励
磁用トランジスタ(309)のスイッチング速度に依存
することになる、初期励磁用トランジスタ(309)自
体のスイッチング速度が非常に速い(11t sec程
度)ことから電流変化率(dl/dt)は高くなり、電
源ラインに必然的に生じる配線インダクタンス(L)に
よって電源粒子AlI には、L−によるスイッチングサージ電圧が生t し、車両に搭載されたラジオにノイズとしての影響を及
ぼしていた。また、そのサージ電圧によって車載の電子
制御機器に誤動作を及ぼす可能性がある等の問題点があ
った。
[Problems to be Solved by the Invention] In the conventional control device, in the initial excitation state when the key switch (5) is turned on, the initial excitation transistor (309)
An initial excitation current flows intermittently through the field coil (102), but since the base current supply resistor (306) of the power transistor (307) is connected to the power supply terminal A, the initial excitation current flows through the field coil (102). Regardless of the intermittent control by the oscillator (311), it is always in a conductive state. Therefore, the current change rate (dI/dt) of the intermittent initial excitation current supplied from the storage battery (4) depends on the switching speed of the initial excitation transistor (309), and the initial excitation transistor (309) itself. Since the switching speed of the is extremely fast (about 11 t sec), the rate of current change (dl/dt) is high, and due to the wiring inductance (L) that inevitably occurs in the power supply line, the power supply particle AlI is affected by the switching surge due to L. Voltage was generated and was affecting the radio installed in the vehicle as noise. In addition, there are other problems such as the possibility that the surge voltage may cause malfunction of electronic control equipment mounted on the vehicle.

この発明は、このような問題点を解決するためになされ
たもので、スイッチングサージ電圧を抑えることができ
る、交流発電機の制御装置を得ることを目的としている
The present invention was made to solve these problems, and an object of the present invention is to provide a control device for an alternator that can suppress switching surge voltage.

[課題を解決するための手段] この発明に係る交流発電機の制御装置は、パワトランジ
スタのベース電流供給用抵抗を整流器の補助整流出力端
に接続したものである。
[Means for Solving the Problems] A control device for an alternating current generator according to the present invention is such that a base current supplying resistor of a power transistor is connected to an auxiliary rectification output end of a rectifier.

[作 用] この発明では、初期励磁状態において、初期励磁用I・
ランジスタのみならずパワートランジスタも断続制御さ
れ、しがもそのスイッチング速度が遅らされるので、蓄
電池がら供給されて断続する初期励磁電流の電流変化率
は低く抑えられ、従ってスイッチングサージ電圧も抑え
られる。
[Function] In this invention, in the initial excitation state, the initial excitation I.
Not only the transistors but also the power transistors are controlled intermittently, and their switching speeds are delayed, so the rate of change in the initial excitation current that is intermittent supplied from the storage battery is kept low, and therefore the switching surge voltage is also suppressed. .

[実施例] 以下、この発明の一実施例を第1図に示した回路図につ
いて詳しく説明する。この発明の一実施例が第2図の従
来装置と違う唯一の点は、ベース電流供給用抵抗(30
5)の一端を、電源端子Aではなく、補助整流出力端(
202)に接続した電圧調整器(3A)を用いることで
ある。
[Embodiment] Hereinafter, an embodiment of the present invention will be described in detail with reference to the circuit diagram shown in FIG. The only difference between this embodiment of the present invention and the conventional device shown in FIG. 2 is that the base current supply resistor (30
Connect one end of 5) to the auxiliary rectifier output terminal (not the power supply terminal A)
202) using a voltage regulator (3A) connected to the

このように構成されたこの発明の一実施例において、ま
ずキースイッチ(5)をONにして初期励磁用トランジ
スタ(309)に断続動作開始させる。
In one embodiment of the present invention configured as described above, first, the key switch (5) is turned on to cause the initial excitation transistor (309) to start intermittent operation.

これによって、蓄電池(4)から補助整流出力端(20
2)に電圧が断続的に印加される。そこで、補助整流出
力端(202)に電圧が印加された時、パワトランジス
タ(307)のベース電流供給用抵抗(306)を通し
て流れる電流はすぐにはパワートランジスタ(307)
のベースには流れ込まず、負帰還コンデンサ(305)
を通して、制御用トランジスタ(304)のベースに負
帰還コンデンサ(305)の充電交流として流れる。こ
の電流が制御用トランジスタ(304)のベース電流と
なって制御用I・ランジスタ(304)は導通状態とな
る。従って、パワートランジスタ(307)は不導通と
なる。その後、負帰還コンデンサ(305)の充電々圧
が上昇し始め、次第にパワートランジスタ(307)に
ベース電流が流れ込み始める。−力負帰還コンデンサ(
305)の充電によって充電交流が次第に減少し、即ち
、制御用トランジスタ(304)のベース電流が減少し
ていく。よって、制御用トランジスタ(304)は徐々
に不導通に、パワートランジスタ(307)は徐々に導
通へと、移行していく。従って、蓄電池から供給される
初期励磁電流の増加も遅らせる。
This allows the auxiliary rectification output end (20
2) A voltage is intermittently applied. Therefore, when a voltage is applied to the auxiliary rectifier output terminal (202), the current flowing through the base current supply resistor (306) of the power transistor (307) is immediately transferred to the power transistor (307).
does not flow into the base of the negative feedback capacitor (305)
The current flows through the base of the control transistor (304) as a charging alternating current to the negative feedback capacitor (305). This current becomes the base current of the control transistor (304), and the control I transistor (304) becomes conductive. Therefore, the power transistor (307) becomes non-conductive. Thereafter, the charging voltage of the negative feedback capacitor (305) begins to rise, and the base current gradually begins to flow into the power transistor (307). - negative feedback capacitor (
305), the charging AC gradually decreases, that is, the base current of the control transistor (304) decreases. Therefore, the control transistor (304) gradually becomes non-conductive, and the power transistor (307) gradually becomes conductive. Therefore, the increase in the initial excitation current supplied from the storage battery is also delayed.

次に、補助整流出力端(202)への電圧印加が遮断さ
れた時、パワートランジスタ(307)のベース電流は
すぐには遮断されず、負帰還コンデンサ(305)の放
電によってパワートランジスタ(307)にベース電流
を流し続け、放電交流の減少とともにベース電流が減少
する。よって、パワートランジスタ(307)は徐々に
不導通へと移行していき蓄電池(4)から供給される初
期励磁電流の減少を遅らせる。即ち、パワートランジス
タ(307)のスイッチング速度を遅くして界磁コイル
(102)に断続する初期励磁電流を流す。
Next, when the voltage application to the auxiliary rectifier output terminal (202) is cut off, the base current of the power transistor (307) is not cut off immediately, and due to the discharge of the negative feedback capacitor (305), the power transistor (307) The base current continues to flow through, and the base current decreases as the discharge alternating current decreases. Therefore, the power transistor (307) gradually becomes non-conductive and delays the decrease in the initial excitation current supplied from the storage battery (4). That is, the switching speed of the power transistor (307) is slowed down to allow an intermittent initial excitation current to flow through the field coil (102).

その後、発電開始後の動作は、従来装置の場合と同様で
ある。
Thereafter, the operation after the start of power generation is the same as that of the conventional device.

[発明の効果] 以上、詳しく説明したように、この発明は、パワートラ
ンジスタのベース電流供給用抵抗を整流器の補助整流出
力端に接続した初期励磁状態において、蓄電池から供給
されて断続する初期励磁電流の電流変化率(dI/dt
)は低く抑えられ、従って電源ラインの配線インダクタ
ンス(L)によって生じられるスイッチングサージ電圧
も抑えられ、これによって車載のラジオノズルを防止す
ることが出来るとともに、他の電子機器への誤動作の不
安も解消される等の効果を奏する。
[Effects of the Invention] As described above in detail, the present invention provides an intermittent initial excitation current supplied from a storage battery in an initial excitation state in which a base current supply resistor of a power transistor is connected to an auxiliary rectification output terminal of a rectifier. Current change rate (dI/dt
) is suppressed to a low level, and therefore the switching surge voltage caused by the wiring inductance (L) of the power line is also suppressed, making it possible to prevent radio nozzles installed in the car and eliminating concerns about malfunctions of other electronic devices. It has effects such as being

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

第1図はこの発明の一実施例を示す回路図、第2図は交
流発電機の、従来の制御装置を示す回路図である。 図において、(1)は交流発電機、(102)は界磁コ
イル、(2)は整流器、(201)は主整流出力端、(
202)は補助整流出力端、(3八)は電圧調整器、(
306)はベース電流供給用抵抗、(307)はパワト
ランジスタ、(309)は初期励磁用トランジスタ、(
4)は蓄電池である。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a circuit diagram showing a conventional control device for an alternating current generator. In the figure, (1) is the alternating current generator, (102) is the field coil, (2) is the rectifier, (201) is the main rectifier output end, (
202) is the auxiliary rectifier output terminal, (38) is the voltage regulator, (
306) is a base current supply resistor, (307) is a power transistor, (309) is an initial excitation transistor, (
4) is a storage battery.

Claims (1)

【特許請求の範囲】[Claims] (1)界磁コイルを有する交流発電機の出力電圧を整流
して、主整流出力端および補助整流出力端から出力する
整流器と、前記主整流出力端からの整流出力によって充
電される蓄電池と、この蓄電池と前記補助整流出力端の
間に接続されて断続接続される開閉素子、および前記界
磁コイルを介して前記補助整流出力端に接続されたパワ
ートランジスタを有し、前記出力電圧を所定値に調整す
る電圧調整器とを備え、前記パワートランジスタのベー
ス電流供給用抵抗を前記補助整流出力端に接続したこと
を特徴とする交流発電機の制御装置。
(1) a rectifier that rectifies the output voltage of an alternator having a field coil and outputs it from a main rectification output terminal and an auxiliary rectification output terminal; and a storage battery that is charged by the rectification output from the main rectification output terminal; A switching element is connected intermittently between the storage battery and the auxiliary rectifier output terminal, and a power transistor is connected to the auxiliary rectifier output terminal via the field coil, and the output voltage is set to a predetermined value. 1. A control device for an alternating current generator, comprising: a voltage regulator for adjusting the voltage, and a resistor for supplying base current of the power transistor is connected to the auxiliary rectifier output terminal.
JP2080611A 1990-03-30 1990-03-30 Control device for ac generator Pending JPH03284200A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2080611A JPH03284200A (en) 1990-03-30 1990-03-30 Control device for ac generator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2080611A JPH03284200A (en) 1990-03-30 1990-03-30 Control device for ac generator

Publications (1)

Publication Number Publication Date
JPH03284200A true JPH03284200A (en) 1991-12-13

Family

ID=13723130

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2080611A Pending JPH03284200A (en) 1990-03-30 1990-03-30 Control device for ac generator

Country Status (1)

Country Link
JP (1) JPH03284200A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100496487B1 (en) * 1996-12-18 2005-09-30 가부시키 가이샤 히다치 카 엔지니어링 Driving device of MOS transistor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100496487B1 (en) * 1996-12-18 2005-09-30 가부시키 가이샤 히다치 카 엔지니어링 Driving device of MOS transistor

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