JPS5899276A - Brake device for motor - Google Patents

Brake device for motor

Info

Publication number
JPS5899276A
JPS5899276A JP19751981A JP19751981A JPS5899276A JP S5899276 A JPS5899276 A JP S5899276A JP 19751981 A JP19751981 A JP 19751981A JP 19751981 A JP19751981 A JP 19751981A JP S5899276 A JPS5899276 A JP S5899276A
Authority
JP
Japan
Prior art keywords
output
motor
circuit
voltage
torque
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.)
Granted
Application number
JP19751981A
Other languages
Japanese (ja)
Other versions
JPS6333388B2 (en
Inventor
Shingi Yokobori
横堀 進義
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 JP19751981A priority Critical patent/JPS5899276A/en
Publication of JPS5899276A publication Critical patent/JPS5899276A/en
Publication of JPS6333388B2 publication Critical patent/JPS6333388B2/ja
Granted 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
    • H02P3/00Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters
    • H02P3/06Arrangements for stopping or slowing electric motors, generators, or dynamo-electric converters for stopping or slowing an individual dynamo-electric motor or dynamo-electric converter

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stopping Of Electric Motors (AREA)

Abstract

PURPOSE:To stop the motor smoothly, by generating a brake controlling voltage, which is constant for a specified period after a triggered time point and thereafter attenuated exponentially, and generating braking torque in the motor by said output voltage. CONSTITUTION:The output of a rotor rotating position detector 2 of the DC motor 1 is inputted to a torque direction setting circuit 3 together with an output 10 of a rotation control circuit 11. A current detecting resistor 6 detects the current of the motor 1, and the current is inputted to a differential amplifier 5. The output of the amplifier 5 is inputted to an amplifier 4. The output of the circuit 3 is also inputted to the amplifier 4. The output of a torque control circuit 7 and the output of a brake control voltage generating circuit 9 are imparted to the other input side of the amplifier 5 through a switch (S) 8. The output of the circuit 11 is inputted to the switch S 8 and also to the circuit 9. A delay circuit 21 of the circuit 9 generates an output 17 after a specified time period from the input time of the output 10. The output 17 turns OFF a transistor 20 from the ON state. Therefore, a capacitor 14 is charged, the voltage 19, which is exponentially attenuated, is generated, and the motor is stopped smoothly.

Description

【発明の詳細な説明】 本発明は電圧によって発生トルクが制御されるモータを
滑らかに停止させるブレーキ装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a brake device that smoothly stops a motor whose generated torque is controlled by voltage.

回転しているモータを機械的なブレーキを使用しないで
停止させるためには、回転方向とは逆方向のトルクを発
生させれば良いことは周知である。
It is well known that in order to stop a rotating motor without using a mechanical brake, it is sufficient to generate torque in the opposite direction to the rotation direction.

しかし、単に逆方向のトルクを発生させるだけでは、モ
ータは停止せずに、やがては逆転してしまう。これを避
けるために、従来は、モータの負荷状態を考慮して、最
大の負荷時に停止する必、9プレーキ力を発生させるに
留め、その後は自然停止させる方法が一般的であった。
However, simply generating torque in the opposite direction will not stop the motor and will eventually reverse the rotation. In order to avoid this, conventionally, it has been common practice to take into consideration the load condition of the motor, generate only 9 brake forces to stop the motor when the load is maximum, and then allow the motor to stop naturally.

しかし、この方法では、ブレーキの開始から停止に至る
までの回転量と、時間とは大きくばらつき、安定な動作
が得られないばかりか、時には、ブレーキ力が大きすぎ
て逆転してしまうという欠点があった。これに対して、
モータの回転方向を検知し、極くわずかの量だけの逆転
を許容することによって、停止まで最大のブレーキトル
クを発生させ、ブレーキ時間の安゛定化を図ることも知
られているが、この場合は、モータの回転方向検知のた
めの回路が複雑になる上に、必ず逆転しなければ停止し
ないという欠点があった〇 本発明は以上の従来例の欠点を排除するものであり、簡
単な構成で確実な停止を実現し得るブレーキ装置を提供
せんとするものである0以下、本発明について図面を参
照して説明する。
However, with this method, the rotation amount and time from the start of the brake to the stop vary widely, making it difficult to obtain stable operation, and sometimes the braking force is too large, resulting in a reverse rotation. there were. On the contrary,
It is also known that by detecting the direction of rotation of the motor and allowing only a small amount of reversal, the maximum braking torque is generated until the motor stops, thereby stabilizing the braking time. In this case, the circuit for detecting the direction of rotation of the motor becomes complicated, and the motor does not stop unless it is reversed.The present invention eliminates the above-mentioned drawbacks of the conventional example and DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the drawings, which aims to provide a brake device that can realize a reliable stop with its configuration.

第1図は本発明の一実施例のブロック構成図である。同
図において、ブラシレス直流モータ1(以下、単にモー
タ1という)のロータ回転位置検出器2の出力は回転制
御回路11の出力10と共にトルク方向設定回路3へ入
力される。電流検出抵抗6はモータ1のアマチュア巻線
の全電流を検出して検出電圧13を発生するように接続
され、検出電圧13は差動増幅器6の反転入力側へ入力
される。差動増幅器6の出力は増幅器4へ入力される。
FIG. 1 is a block diagram of an embodiment of the present invention. In the figure, the output of a rotor rotational position detector 2 of a brushless DC motor 1 (hereinafter simply referred to as motor 1) is input to a torque direction setting circuit 3 together with an output 10 of a rotation control circuit 11. The current detection resistor 6 is connected to detect the total current of the armature winding of the motor 1 and generate a detection voltage 13, and the detection voltage 13 is input to the inverting input side of the differential amplifier 6. The output of differential amplifier 6 is input to amplifier 4.

増幅器4へは前記トルク方向設定回路3の出力も同時に
入力され、モータ1のアマチュア電流の大きさと方向と
が制御される。トルク制御回路7の出力とブレーキ制御
電圧発生回路9の出力は、それぞれスイッチ8の接点X
およびYへ接続され、スイッチ8の出力12は差動増幅
器6の非反転入力側へ入力される。回転制御回路11の
出力1oはスイッチ8およびブレーキ制御電圧発生回路
9へも入力される。
The output of the torque direction setting circuit 3 is also input to the amplifier 4 at the same time, and the magnitude and direction of the armature current of the motor 1 are controlled. The output of the torque control circuit 7 and the output of the brake control voltage generation circuit 9 are connected to the contact X of the switch 8, respectively.
and Y, and the output 12 of the switch 8 is input to the non-inverting input side of the differential amplifier 6. The output 1o of the rotation control circuit 11 is also input to the switch 8 and the brake control voltage generation circuit 9.

次に第1図の実施例の動作を説明する。モータ1の発生
トルクはアマチュア電流に比例するから、電流検出抵抗
6による検出電圧13も発生トルクに比例する。差動増
幅器5は、スイッチ8の出力12と検出電圧13との誤
差増幅器として動作し、モータ1はスイッチ8の出力1
2に比例するトルりを発生するように増幅器4によって
駆動されるO通常の回転時は1回転制御回路11の出力
10によってスイッチ8はX例へ接続され、モータ1は
トルク制御回路7によって、トルク制御あるいは速度制
御、さらには位相制御等が施されるOこの時のモータ1
の回転方向はトルク方向設定回路3によって所望の方向
に設定される。ブレーキ時は、回、転制御回路11の出
力10によって、スイッチ8はX例へ接続され、モータ
1はブレーキ制御電圧発生回路9によってトルク制御が
施される。同時に、トルク方向設定回路3はモータ1が
通常回転時とは逆の方向のトルクすなわちフ゛レーキト
ルクを発生するように増幅器4の極性を切り換えるよう
に動作する。さらに同時に、ブレーキ市1j御電圧発生
回路9がトリガされて、ブレーキIIJ御電圧を発生す
る。以後はモータ1はブレーキ市1j御電圧に比例した
プレーキト/レフを発生し、減速ののち停止する。
Next, the operation of the embodiment shown in FIG. 1 will be explained. Since the torque generated by the motor 1 is proportional to the armature current, the voltage 13 detected by the current detection resistor 6 is also proportional to the generated torque. The differential amplifier 5 operates as an error amplifier between the output 12 of the switch 8 and the detection voltage 13, and the motor 1 operates as an error amplifier between the output 12 of the switch 8 and the detection voltage 13.
During normal rotation, the switch 8 is connected to the output 10 of the one-turn control circuit 11, and the motor 1 is driven by the amplifier 4 to generate a torque proportional to 2. At this time, the motor 1 is subjected to torque control, speed control, phase control, etc.
The rotation direction of the torque direction setting circuit 3 is set to a desired direction. During braking, the switch 8 is connected to the X example by the output 10 of the rotation control circuit 11, and the motor 1 is subjected to torque control by the brake control voltage generation circuit 9. At the same time, the torque direction setting circuit 3 operates to switch the polarity of the amplifier 4 so that the motor 1 generates a torque in the opposite direction to that during normal rotation, that is, a brake torque. Furthermore, at the same time, the brake IJ control voltage generation circuit 9 is triggered to generate the brake IIJ control voltage. Thereafter, the motor 1 generates brake torque/reflex proportional to the brake control voltage, decelerates, and then stops.

第2図に前記ブレーキ制御電圧発生回路9の構成例を示
す。同図において、遅延回路21には。
FIG. 2 shows an example of the configuration of the brake control voltage generation circuit 9. In the figure, the delay circuit 21 includes:

前記回転制御回路11の出力ioが入力されて一定時間
後に出力17を発生する。この出力17はトランジスタ
2oのベースへ供給される。コンデンサ14と抵抗16
および16が順に直列接続され、電源(Vcc)18と
アース間にコンデンサ14を電源側にして接続する。ト
ランジスタ2oのコレクタおよびエミッタはコンデンサ
14の両端に接続し、抵抗16と16の接続点から出力
19を得るようにしている。ここで、第2図の動作につ
いて第3図を用いて説明する。第3図の(−)は回転制
御回路11の出力10.(b)は遅延回路21の出力t
7.(0)はブレーキ制御電圧発生回路9の出力19の
各波形である。時刻t。顛おいて、(−)の出力1oが
発生せられてプレーギ開始が行なわれると、一定時間後
の時刻t、に(b)の出力17がトランジスタ2oをオ
ンからオフにすΣ0その結果、コンデンサ14は充電さ
れ、その充電電流が抵抗15.16を、流れる。時刻t
0〜t、の時間はトランジスタ20がオンしているため
、 (C)の電圧は、その結果、第3図(C)に1−9
で示すように指数関数的に減衰する電圧波形が得られる
。この電圧19が、第1図のスイッチ8のY側端子を通
じて差動増幅器6の非反転側入力へ印加されるから、モ
ータ1の発生トルクは、第3図(c)の電圧19に比例
するように制御される(但し、時刻t0以前は示してい
ない)。この発生トルク社モータ1のプレキに々るが、
ブレーキトルクとしては、負荷トルクが加わるため、第
3図(d)のようになる。なお、図中の入はブレーキト
ルク、Bは負荷トルクを示す。
The output io of the rotation control circuit 11 is inputted and an output 17 is generated after a certain period of time. This output 17 is supplied to the base of transistor 2o. capacitor 14 and resistor 16
and 16 are connected in series in order, and the capacitor 14 is connected between the power supply (Vcc) 18 and the ground with the capacitor 14 on the power supply side. The collector and emitter of the transistor 2o are connected to both ends of the capacitor 14, so that an output 19 is obtained from the connection point between the resistors 16 and 16. Here, the operation shown in FIG. 2 will be explained using FIG. 3. (-) in FIG. 3 is the output 10. of the rotation control circuit 11. (b) is the output t of the delay circuit 21
7. (0) is each waveform of the output 19 of the brake control voltage generation circuit 9. Time t. Later, when the (-) output 1o is generated and a pre-gear start is performed, the output 17 of (b) turns the transistor 2o from on to off at time t after a certain period of time Σ0 As a result, the capacitor 14 is charged, and the charging current flows through resistor 15.16. Time t
Since the transistor 20 is on during the period from 0 to t, the voltage at (C) becomes 1-9 as shown in FIG. 3(C).
A voltage waveform that decays exponentially is obtained as shown in . Since this voltage 19 is applied to the non-inverting side input of the differential amplifier 6 through the Y-side terminal of the switch 8 in FIG. 1, the torque generated by the motor 1 is proportional to the voltage 19 in FIG. 3(c). (However, the time before time t0 is not shown). The generated torque of the motor 1 is as follows.
Since the load torque is added to the brake torque, it becomes as shown in FIG. 3(d). In addition, in the figure, "ON" indicates brake torque, and "B" indicates load torque.

ブレーキトルクは、時刻t1以後徐々に減衰して、やが
ては負荷トルクのみになるため、逆方向発生トルクが大
きすぎてモータ1が停止後逆転してしまうという事態は
発生せず、確実に停止する。
Since the brake torque gradually attenuates after time t1 and eventually becomes only the load torque, a situation where the torque generated in the reverse direction is too large and causes the motor 1 to reverse after stopping does not occur, and the motor 1 is stopped reliably. .

従って、モータ1の回転速度は第3図(e)に示すよう
に、時刻t0からは一定の割合で直線的に減少し、時刻
t、以後は指数関数的に減少し、停止に至る。
Therefore, as shown in FIG. 3(e), the rotation speed of the motor 1 decreases linearly at a constant rate from time t0, and after time t, decreases exponentially until it stops.

つぎに本発明−の他の実施例について説明する。Next, other embodiments of the present invention will be described.

第4図は、ロータ回転位置検出器への印加電圧によって
モータの発生トルクが制御されるブラシレス直流モータ
への本発明の実施例である。同図において、第゛1図に
示したものと同じ符号を付した構成要素は同一機能の要
素を示す。ブラシレス直流モータ25(以下、モータ2
6という)のアマチュア巻線の電圧23は駆動増+p/
ga2aの入力側へ負帰還されている。モータ26の回
転位置検出器22へは回転制御回路11の出力1oとス
イッチ8の出力12が入力され、出力12の電圧に比例
したトルクを発生するようになされている。この第4図
においても、第3図に示した前記実施例と同様の動作を
行って、モータ26は確実に停止させられることはいう
までもない。
FIG. 4 shows an embodiment of the present invention applied to a brushless DC motor in which the torque generated by the motor is controlled by the voltage applied to the rotor rotational position detector. In the figure, components with the same reference numerals as those shown in FIG. 1 indicate elements having the same function. Brushless DC motor 25 (hereinafter referred to as motor 2)
The voltage 23 of the armature winding (referred to as 6) is the drive increase +p/
Negative feedback is provided to the input side of ga2a. The output 1o of the rotation control circuit 11 and the output 12 of the switch 8 are input to the rotational position detector 22 of the motor 26, and a torque proportional to the voltage of the output 12 is generated. It goes without saying that in FIG. 4, the same operation as in the embodiment shown in FIG. 3 is carried out to ensure that the motor 26 is stopped.

第6図はブラシ付直流モータへの本発明の実施例である
。同図においても、第1図と同じ符号の構成要素は同じ
機能を果す。ブラシ付直流モータ31は周知の如く、印
加電圧に比例したトルクを発生するから、増幅器33へ
はスイッチ8の出力12が入力され、出力12の電圧に
比例したトルクが得られる。回転方向設定回路32は回
転制御回路11の出力1oによって、増幅器33の出力
がブラシ付直流モータ31へ印加される時の極性を切換
えるように動作する。この実施例においても、第3図(
0)に示したブレーキ制御電圧によってブラシ付直流モ
ータ31は逆転することなく確実に停止する。
FIG. 6 shows an embodiment of the present invention applied to a brushed DC motor. In this figure as well, components having the same reference numerals as in FIG. 1 perform the same functions. As is well known, the brushed DC motor 31 generates a torque proportional to the applied voltage, so the output 12 of the switch 8 is input to the amplifier 33, and a torque proportional to the voltage of the output 12 is obtained. The rotation direction setting circuit 32 operates to switch the polarity when the output of the amplifier 33 is applied to the brushed DC motor 31 based on the output 1o of the rotation control circuit 11. In this embodiment as well, FIG.
The brushed DC motor 31 is reliably stopped without reverse rotation by the brake control voltage shown in 0).

以上説明したように、本発明によれば、機憾的なブレー
キ或はモータ回転方向検出装置を用いることなく、モー
タを確実に停止させることが可能となる。本発明は前述
の実施例からも明らかなように、簡単な構成であるにも
かかわらず、プレ〜キ開始から停止までの時間或はモー
タの回転量がブレーキ制御電圧によって制御されるため
、負荷変動の影響を受は難く、安定な動作が得られる。
As described above, according to the present invention, it is possible to reliably stop the motor without using a brake or a motor rotation direction detection device. As is clear from the above-described embodiments, the present invention has a simple configuration, but since the time from start to stop of the pre-brake or the amount of rotation of the motor is controlled by the brake control voltage, the load can be reduced. It is not easily affected by fluctuations and stable operation can be obtained.

なお、本発明は主旨を変えずに種々の変形が可能である
ことは言うまでもない。例えば、モータトルクの制御を
電流で行うようにしても良く、本発明に含まれる。
It goes without saying that the present invention can be modified in various ways without changing the spirit thereof. For example, the motor torque may be controlled by electric current, which is included in the present invention.

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

第1図は本発明の一実施例を示すブロック構成図、第2
図は本発明で使用し得るブレーキ制御電圧発生回路の構
成例を示す図、第3図(a)、 (b)、 (01゜(
d)+ (@)は本発明の実施例の動作波形を示す図、
第4図および第6図はそれぞれ本発明の他の実施例を示
すブロック構成図である。 1.26・・・−・・ブラシレス直流モータ、2・−・
・ロータ回転位置検出器、3・・・・・・トルり方向設
定回路、4・・・・・増幅器、6・・・・・・差動増幅
器、7・・・・・・トルク制御回路、8・・−・・・う
イッチ、9・・・・ブレーキ制御電圧発生回路、11・
・・・・・回転制御回路、22・・・・・・回転位置検
出器、24・−・・・増幅器、31−・・・・・ブラシ
付直流モータ、32・・・・・回転方向設定回路、33
・・・・・・増幅器。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名第1
図 第2図 L                  +     
   J第3図 □肋間
FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
The figure shows an example of the configuration of a brake control voltage generation circuit that can be used in the present invention.
d) + (@) is a diagram showing operation waveforms of an embodiment of the present invention,
FIGS. 4 and 6 are block diagrams showing other embodiments of the present invention, respectively. 1.26...--Brushless DC motor, 2--
・Rotor rotational position detector, 3... Torque direction setting circuit, 4... Amplifier, 6... Differential amplifier, 7... Torque control circuit, 8... Switch, 9... Brake control voltage generation circuit, 11...
... Rotation control circuit, 22 ... Rotation position detector, 24 ... Amplifier, 31 ... ... DC motor with brush, 32 ... Rotation direction setting circuit, 33
······amplifier. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 2 L +
JFigure 3 □ Intercostal space

Claims (1)

【特許請求の範囲】[Claims] (1)電圧によって発生トルクが制御されるモータと、
ブレーキ制御電圧発生回路とを具備し、前記ブレーキ制
御電圧発生回路はトリガ時点から一定時間は一定電圧で
、その後指数関数的に減衰する電圧を発生するように構
成され、その出力電圧によって前記モータを前記一定時
間だけは一定で、その後指数関数的に減衰するブレーキ
トルクを発生させて停止に至らせしめるように構成した
ことを特徴とするモータのブレーキ装置。 @)ブレーキ制御電圧発生回路は、コンデンサと抵抗器
とを電源とアース間に直列に接続し、トランジスタのエ
ミッタおよびコレクタを前記コンデンサの両端に接続し
、一定時間の遅延を与える遅延回路の出力を前記トラン
ジスタのベースに供給するごとく、前記抵抗器と前記コ
ンデンサの接続点もしくは前記抵抗器の任意の分圧点を
出力端子とし、前記遅延回路の入力側を入力端子とする
構成によって、前記入力端子にトリガ信号が印加された
後、前記遅延回路で定まる時間経過する時刻までは前記
トランジスタ嬬導通状態で前記コンデンサを短絡し、前
記時刻以後はトランジスタが遮断して、前記コンデンサ
の両端の電圧が指数関数的に変化するようにし、前記出
力端子から出力電圧を得9るように構成されていること
を特徴とする特許請求。範、第(1)iE載。ニーps
−v−ヤ装置。
(1) A motor whose generated torque is controlled by voltage;
and a brake control voltage generation circuit, the brake control voltage generation circuit is configured to generate a voltage that is constant for a certain period of time from the trigger point and then decays exponentially, and the output voltage drives the motor. A braking device for a motor, characterized in that it is configured to generate a braking torque that is constant for the predetermined period of time and then decays exponentially to bring the motor to a stop. @) The brake control voltage generation circuit connects a capacitor and a resistor in series between a power supply and ground, connects the emitter and collector of a transistor to both ends of the capacitor, and connects the output of a delay circuit that provides a fixed time delay. The input terminal is supplied to the base of the transistor by a configuration in which the connection point between the resistor and the capacitor or an arbitrary voltage dividing point of the resistor is an output terminal, and the input side of the delay circuit is an input terminal. After a trigger signal is applied to the delay circuit, the transistor remains conductive until a time determined by the delay circuit has elapsed, shorting the capacitor, and after that time, the transistor is cut off and the voltage across the capacitor becomes exponential. 9. Claims: 1. Claims characterized in that the output voltage is varied functionally and is configured to obtain an output voltage from the output terminal. Han, No. (1) iE publication. knee ps
-v-ya device.
JP19751981A 1981-12-07 1981-12-07 Brake device for motor Granted JPS5899276A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP19751981A JPS5899276A (en) 1981-12-07 1981-12-07 Brake device for motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP19751981A JPS5899276A (en) 1981-12-07 1981-12-07 Brake device for motor

Publications (2)

Publication Number Publication Date
JPS5899276A true JPS5899276A (en) 1983-06-13
JPS6333388B2 JPS6333388B2 (en) 1988-07-05

Family

ID=16375810

Family Applications (1)

Application Number Title Priority Date Filing Date
JP19751981A Granted JPS5899276A (en) 1981-12-07 1981-12-07 Brake device for motor

Country Status (1)

Country Link
JP (1) JPS5899276A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62155783A (en) * 1985-12-26 1987-07-10 Teac Co Stop device for revolution of motor
JPH01238481A (en) * 1988-03-17 1989-09-22 Matsushita Electric Ind Co Ltd Stopper for motor
JPH02168877A (en) * 1988-12-21 1990-06-28 Matsushita Electric Ind Co Ltd Stopping device for motor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05166083A (en) * 1991-12-13 1993-07-02 New Cosmos Electric Corp Warning device for gas leakage

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513362A (en) * 1974-06-28 1976-01-12 Mitsunori Handa Puuriijikubuno seizoohoo
JPS56150985A (en) * 1980-04-25 1981-11-21 Fujitsu Ltd Controlling system for motor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS513362A (en) * 1974-06-28 1976-01-12 Mitsunori Handa Puuriijikubuno seizoohoo
JPS56150985A (en) * 1980-04-25 1981-11-21 Fujitsu Ltd Controlling system for motor

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62155783A (en) * 1985-12-26 1987-07-10 Teac Co Stop device for revolution of motor
JPH01238481A (en) * 1988-03-17 1989-09-22 Matsushita Electric Ind Co Ltd Stopper for motor
JPH02168877A (en) * 1988-12-21 1990-06-28 Matsushita Electric Ind Co Ltd Stopping device for motor

Also Published As

Publication number Publication date
JPS6333388B2 (en) 1988-07-05

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