JPS60139181A - Drive circuit for dc motor - Google Patents

Drive circuit for dc motor

Info

Publication number
JPS60139181A
JPS60139181A JP58250511A JP25051183A JPS60139181A JP S60139181 A JPS60139181 A JP S60139181A JP 58250511 A JP58250511 A JP 58250511A JP 25051183 A JP25051183 A JP 25051183A JP S60139181 A JPS60139181 A JP S60139181A
Authority
JP
Japan
Prior art keywords
power
transistor
power source
circuit
control circuit
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
JP58250511A
Other languages
Japanese (ja)
Inventor
Yuji Masaki
正木 雄二
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP58250511A priority Critical patent/JPS60139181A/en
Publication of JPS60139181A publication Critical patent/JPS60139181A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02PCONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P7/00Arrangements for regulating or controlling the speed or torque of electric DC motors
    • H02P7/03Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors
    • H02P7/04Arrangements for regulating or controlling the speed or torque of electric DC motors for controlling the direction of rotation of DC motors by means of a H-bridge circuit

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor And Converter Starters (AREA)

Abstract

PURPOSE:To prevent the simultaneous conduction between power transistors by interrupting the base of the power transistor when a controller power source decreases from a reference voltage formed from a power source for power. CONSTITUTION:A detecting transistor 7 monitors a power source VM for power and a controller power source VC, and is OFF in the normal state. Accordingly, power transistors 1, 2, 3, 4 are normally controlled by switching controllers 5, 6. When the power source VC decreases to the ON condition of the transistor 7, the transistor 7 becomes ON, and a power transistor base interruptor 8 becomes ON. As a result, the transistors 2, 4 become OFF, and a shortcircuiting mode of the power source VM does not thereafter occur.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、正逆運転可能に構成した直流モータの駆動回
路に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a drive circuit for a DC motor configured to be capable of forward and reverse operation.

従来例の構成とその問題点 従来、直流モータを正逆運転する方法として、2ベノ パワートランジスタをブリッジに構成し、パワートラン
ジスタの通電を切替え□ることによりモータへ流れる電
流の方向を切替え、正逆運転させるのが一般的であるっ
この時、パワートランジスタは絶対に上下のアーム間で
同時にオンしない制御論理の回路で制御されている。も
し、同時オンした場合には、パワー電源回路を短絡する
事になりパワートランジスタを破壊する恐れがある。
Conventional configuration and its problems Conventionally, as a method for forward and reverse operation of a DC motor, two Beno power transistors are configured as a bridge, and the direction of the current flowing to the motor is changed by switching the energization of the power transistor. In this case, where reverse operation is common, the power transistor is controlled by a control logic circuit that never turns on the upper and lower arms at the same time. If they are turned on at the same time, the power supply circuit will be short-circuited and the power transistor may be destroyed.

しかし、定常状態においては、前記の様に上下間のナー
ムは同時オンじないが、電源の投入、遮断時は制御回路
の電源が不安定であり、上記の様に確実に制御される保
障は無い。その時点でパワー電源が充分であれば、パワ
ートランジスタは破壊する場合がある2 従らて、第1図に示すようにパワー電源を制御回路電源
が充分に確立している時に投入、遮断してやる必要があ
る。従来は第1図に示す様な各電源の投入、遮断を、マ
ニュアル操作で、制御回路の電源を投入してからパワー
電源を投入し、各電源遮断時には先にパワー電源を遮断
している。ま3 ベージ た、前記の方法を電気回路的に実施する為のタイマー回
路を構成したシして対処して来た。そ2の為操作が煩わ
しかったり、゛制御回路電源の瞬断までも考慮に入れた
タイマー回路では構成が複雑になる欠点があった。
However, in steady state, the upper and lower arms are not turned on at the same time as mentioned above, but the power supply of the control circuit is unstable when the power is turned on and off, so there is no guarantee that the control will be reliably controlled as described above. None. If the power supply is sufficient at that time, the power transistor may be destroyed.2 Therefore, as shown in Figure 1, it is necessary to turn on and off the power supply when the control circuit power supply is sufficiently established. There is. Conventionally, each power source is manually turned on and off as shown in FIG. 1, by turning on the control circuit power and then turning on the power source, and when each power source is shut off, the power source is first shut off. Third, we have dealt with this problem by configuring a timer circuit to implement the above method using an electrical circuit. Second, the operation is troublesome, and a timer circuit that takes even instantaneous power outages into consideration has the disadvantage of having a complicated configuration.

発明の目的 本発明は、上記従来の欠点に鑑みてなされたもので、簡
単な構成で制御電源の投入、遮断時におけるブリッジ間
のアームの同時導通を防止し、パワートランジスタの破
壊を未然に防止することを゛目的とするものである。
Purpose of the Invention The present invention has been made in view of the above-mentioned conventional drawbacks, and has a simple configuration that prevents simultaneous conduction of arms between bridges when turning on and off control power, thereby preventing damage to power transistors. The purpose is to do so.

発明の構成 本発明は、パワー電源の電圧と、制御回路電源の電圧全
モニターシていて、制御回路電源がパワー電源から作っ
た基準電圧より下がると、パワートランジスタのベース
を遮断して、パワートランジスタアーム間の同時導通を
防ぐものである。
Structure of the Invention The present invention monitors the voltage of the power supply and the voltage of the control circuit power supply, and when the control circuit power supply falls below a reference voltage generated from the power supply, the base of the power transistor is cut off, and the power transistor is shut off. This prevents simultaneous conduction between arms.

実施例の説明 以下、本発明の実施例を第2図を参照して説明する。モ
ータ1oはブリッジ状に接続したパワートランジスタ1
,2,3.4i介してパワー電源vMに接続されている
。定常状態においては、各パワートランジスタ1.2,
3.4のベースが接続されたスイッチング制御回路5,
6によシその導通がコントロールされモータの正逆回転
及び、アーム間の同時導通の防IFがコントロールされ
る。
DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to FIG. The motor 1o has a power transistor 1 connected in a bridge configuration.
, 2, 3.4i to the power supply vM. In steady state, each power transistor 1.2,
3. Switching control circuit 5 connected to the base of 4,
The conduction is controlled by 6, and the forward/reverse rotation of the motor and the prevention IF of simultaneous conduction between the arms are controlled.

例えば、スイッチング制御回路6からの信号によりパワ
ートランジスタ3,2がオンすると、矢印入方向に電流
が流れ、スイッチング制御回路6からの信号によりパワ
ートランジスタ1,4がオンすると、矢印B方向に電流
が流れ、モータ1oの回転方向を切替える構成となって
いる。一方、9はパワー電源の電圧を分圧する為のツェ
ナーダイオードであり、例えば制御回路が正常に動作出
来なく雇る電圧1に4.8Vとするとツェナー電圧全5
・4vと設定している。7はパワー電源vM と制御回
路電源Vc kモニターする検出トランジスタで、パワ
ー電源VM’eツェナーダイオード9で分圧した電位を
エミッタに入力し、ベースは制御回路電源Vcへ接続さ
れている。したがって、今、5 ぺ・−ジ 制御回路電源Vo’15Vとすると、定常状態において
は、検出トランジスタ70ベースは5vsエミツタは5
.4vと検出トランジスタ7がオンする電圧差0・6v
以下であるから検出トランジスタ7はオフしている。し
たがって、パワートランジスタ1,2,3.4はスイッ
チング制御回路6゜6により正常にコントロールされる
。8は検出トランジスタ7のオン時に動作して、パワー
トランジスタ2.−へのベース電流全遮断するパワート
ランジスタベース遮断回路で、トランジスタト哲抗によ
り構成している。
For example, when power transistors 3 and 2 are turned on by a signal from switching control circuit 6, current flows in the direction of arrow B, and when power transistors 1 and 4 are turned on by a signal from switching control circuit 6, current flows in the direction of arrow B. The configuration is such that the direction of rotation of the motor 1o can be switched. On the other hand, 9 is a Zener diode for dividing the voltage of the power supply.For example, if the control circuit cannot operate normally and the voltage 1 required is 4.8V, the Zener voltage total 5
・It is set to 4v. A detection transistor 7 monitors the power source vM and the control circuit power source Vck, inputs a potential divided by the power source VM'e by a Zener diode 9 to its emitter, and its base is connected to the control circuit power source Vc. Therefore, if the control circuit power source Vo' is 15V, in the steady state, the base of the detection transistor 70 is 5vs the emitter is 5V.
.. 4v and the voltage difference at which the detection transistor 7 turns on is 0.6v
Since it is below, the detection transistor 7 is turned off. Therefore, the power transistors 1, 2, 3.4 are normally controlled by the switching control circuit 6.6. 8 operates when the detection transistor 7 is turned on, and the power transistors 2.8 operate. This is a power transistor base cutoff circuit that completely cuts off base current to -, and is constructed using a transistor design.

次に動作全説明するコ 今、制御回路電源vcが検出トランジスタフのオン条件
5.4V−〇、6V=4.8V まで下がると1.検出
トランジスタ7はオンして続いて、パワートランジスタ
ベース遮断回路8もオンする。
Next, I will explain the entire operation.Now, when the control circuit power supply VC falls to the detection transistor ON condition 5.4V-〇, 6V=4.8V, 1. The detection transistor 7 is turned on and subsequently the power transistor base cutoff circuit 8 is also turned on.

この結果、パワートランジスタ2.4のベースは遮断さ
れて、パワートランジスタ2.4はオフして以後パワー
電源VM 、(D短絡モードは発生しないっしたがって
、各電源の投入時、パワー電源vM が6 ページ 先に立上っても制御回路電源vcが4.8vになるまで
は、検出トランジスタ7がオンしたままであるから、前
記の様にアームの短絡は発生しない。
As a result, the base of the power transistor 2.4 is cut off, the power transistor 2.4 is turned off, and the power source VM (D short circuit mode does not occur). Therefore, when each power source is turned on, the power source vM is 6 Since the detection transistor 7 remains on until the control circuit power supply VC reaches 4.8V even after the start of the page, the arm short circuit does not occur as described above.

又、電源遮断時においても、パワー電源vM がまだ6
.4V以上の時に制御回路電源vcが落ち始めると、検
出トランジスタ7がオンしてアームの短絡は発生しない
Also, even when the power is cut off, the power supply vM is still 6
.. When the control circuit power supply VC starts to drop when the voltage is 4V or more, the detection transistor 7 is turned on and no short circuit occurs in the arm.

前記の様に、パワー電源vMの分圧レベルを調整する電
圧を制御回路電源VCの電圧が制御回路が正常に動作す
る電圧よりo、ev高くしておく事により可能である事
が判る。
As mentioned above, it can be seen that it is possible to adjust the voltage division level of the power source vM by setting the voltage of the control circuit power source VC to be o, ev higher than the voltage at which the control circuit normally operates.

発明の効果 以上の如く本発明では、ツェナーダイオードと検出トラ
ンジスタによりパワー電源と制御回路電源をモニ’ L
%制御回路電源が下がるとパワートラ〈ジスタを遮、断
するものであり、制御回路電源の投入、遮断時のみなら
ず、瞬断時においてもブリッジ間のアームの!時導通を
無くし)〒ワートランジスタの破壊を防ぐ事が可能であ
る、。又、その保護回路の構成も簡単で安価に製作する
ことが7 ページ できる。
Effects of the Invention As described above, the present invention monitors the power source and the control circuit power source using a Zener diode and a detection transistor.
% When the control circuit power goes down, the power transistor is shut off or disconnected, and not only when the control circuit power is turned on or off, but also when the arm between the bridges is cut off! It is possible to prevent damage to the power transistor by eliminating current conduction. Moreover, the structure of the protection circuit is simple and can be manufactured at low cost.

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

第1図はパワー電源、制御回路電源間の正常な場合の立
上り、立下り関係を示す説明図、第2図は本発明の実施
例にかかる回路図である。 1〜4・・川・パワートランジスタ、6.6・・・・・
・スイッチング制御回路、7・・・・・・検出トランジ
スタ、8・・・・・・パワートランジスタペース遮断回
路、9・・・・・・ツェナーダイオード、1o・川・・
モータ。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名第1
図 第2図
FIG. 1 is an explanatory diagram showing a normal rise and fall relationship between a power source and a control circuit power source, and FIG. 2 is a circuit diagram according to an embodiment of the present invention. 1-4... River power transistor, 6.6...
・Switching control circuit, 7...detection transistor, 8...power transistor pace cutoff circuit, 9...zener diode, 1o river...
motor. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2

Claims (1)

【特許請求の範囲】[Claims] 直流モータを正逆方向へ回転させる為にパワートランジ
スタをブリッジ状に構成した回路において前記モータの
駆動用パワー電源をツェナーダイオードで分圧した電位
を検出トランジスターのエミッタへ入力し、前記検出ト
ランジスターのベースには、前記パワートランジスター
を制御する制御回路電源へ接続し、前記トランジスター
の出力を前記パワートランジスタのベース回路をオフす
るパワートランジスタベース遮断回路へ接続した直流モ
ータ駆動回路。
In a circuit in which power transistors are configured in a bridge shape to rotate a DC motor in forward and reverse directions, a potential obtained by dividing the power source for driving the motor by a Zener diode is input to the emitter of the detection transistor, and the potential is input to the emitter of the detection transistor. The DC motor drive circuit is connected to a control circuit power supply that controls the power transistor, and the output of the transistor is connected to a power transistor base cutoff circuit that turns off the base circuit of the power transistor.
JP58250511A 1983-12-26 1983-12-26 Drive circuit for dc motor Pending JPS60139181A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP58250511A JPS60139181A (en) 1983-12-26 1983-12-26 Drive circuit for dc motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP58250511A JPS60139181A (en) 1983-12-26 1983-12-26 Drive circuit for dc motor

Publications (1)

Publication Number Publication Date
JPS60139181A true JPS60139181A (en) 1985-07-23

Family

ID=17208973

Family Applications (1)

Application Number Title Priority Date Filing Date
JP58250511A Pending JPS60139181A (en) 1983-12-26 1983-12-26 Drive circuit for dc motor

Country Status (1)

Country Link
JP (1) JPS60139181A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5815478A (en) * 1981-07-21 1983-01-28 Brother Ind Ltd Current control device in speed control device of dc motor

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5815478A (en) * 1981-07-21 1983-01-28 Brother Ind Ltd Current control device in speed control device of dc motor

Similar Documents

Publication Publication Date Title
JPH06178579A (en) Refrigeration cycle controller
JPH06104000B2 (en) Brushless motor drive circuit for rechargeable tools
JP2747911B2 (en) Driving circuit of electrostatic induction type self-extinguishing element and inverter device having electrostatic induction type self-extinguishing element
JPS60139181A (en) Drive circuit for dc motor
JP3087760B2 (en) Motor control circuit
JP3099256B2 (en) Drive device for brushless motor
JPH0473327B2 (en)
JP2536919B2 (en) AC zero current cutoff control circuit
KR970002273B1 (en) Bldc control circuit
JPH07337029A (en) Method for preventing increase of current limit loss of inverter
JPS60207490A (en) Drive circuit for motor
JP6408625B2 (en) Semiconductor device, drive mechanism, and motor drive control method
JP2922716B2 (en) DC braking method of inverter device
JPH06269194A (en) Motor drive control circuit and motor drive control method in the circuit
JP2813735B2 (en) DC-DC converter
JPS6245482Y2 (en)
KR960000356B1 (en) Disconnection circuit of washing machine
JPH0228811A (en) Over-current detector
JPH0219717B2 (en)
JPS6176027A (en) Preventive circuit for inrush current
JP2779518B2 (en) Power supply device with cut-off function
KR930001678Y1 (en) Arrangement for starting electric motor
JPH0720376B2 (en) Inverter circuit
JPH0622322B2 (en) Switching transistor protection circuit
JPH0349585A (en) Drive circuit for dc motor