JPS6111074B2 - - Google Patents
Info
- Publication number
- JPS6111074B2 JPS6111074B2 JP9157177A JP9157177A JPS6111074B2 JP S6111074 B2 JPS6111074 B2 JP S6111074B2 JP 9157177 A JP9157177 A JP 9157177A JP 9157177 A JP9157177 A JP 9157177A JP S6111074 B2 JPS6111074 B2 JP S6111074B2
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- motor
- circuit
- electromagnetic brake
- 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.)
- Expired
Links
- 238000001514 detection method Methods 0.000 claims description 11
- 230000005284 excitation Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 10
- 239000003990 capacitor Substances 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 5
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005281 excited state Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Landscapes
- Stopping Of Electric Motors (AREA)
Description
【発明の詳細な説明】
本発明は無励磁作動形電磁ブレーキ用電源装置
に関し、詳細には切換スイツチをONからOFFに
切換えた時にモートルからの逆起電力があつても
電磁ブレーキを速やかに作動させる電磁ブレーキ
用電源装置に関する。[Detailed Description of the Invention] The present invention relates to a power supply device for a non-excited electromagnetic brake, and more specifically, it operates the electromagnetic brake immediately even if there is a back electromotive force from the motor when the changeover switch is switched from ON to OFF. This invention relates to a power supply device for an electromagnetic brake.
一般に、第１図は無励磁作動形電磁ブレーキの
使用方法を示す図である。今、第２図に示す時刻
ＴOFFで第１図のスイツチ２をONからOFFへ切
換えて交流電源１からの電流を遮断した時にモー
トル３には残留磁束があるので、モートル３が回
転を続けるとモートル端子電圧ＥAには第２図に
示す減衰振動の交流電圧が発生する。このモート
ル端子電圧ＥAはブレーキ用電源装置６の入力電
圧となるため、電磁ブレーキ用電圧ＥBもモート
ル端子電圧ＥAが発生している間は印加され続け
ている。通常は、点線５で示されているようにモ
ートル３と電磁ブレーキ４とがモートルブレーキ
として一体に構成されている。 Generally, FIG. 1 is a diagram showing how to use a non-excitation operated electromagnetic brake. Now, when switch 2 in Figure 1 is switched from ON to OFF at time T OFF shown in Figure 2 to cut off the current from AC power supply 1, there is residual magnetic flux in motor 3, so motor 3 continues to rotate. An alternating current voltage with damped oscillation as shown in FIG. 2 is generated at the motor terminal voltage E A . Since this motor terminal voltage E A becomes the input voltage of the brake power supply device 6, the electromagnetic brake voltage E B continues to be applied while the motor terminal voltage E A is generated. Usually, as shown by the dotted line 5, the motor 3 and the electromagnetic brake 4 are integrally constructed as a motor brake.
従来は、モートルを停止するためにスイツチ２
をONからOFFに切換えても、モートル３からの
逆起電力により電磁ブレーキ４に長い間電流が流
れ続けた。無励磁作動形電磁ブレーキ４は電流が
流れている時は制動しないため制動を始めるまで
時間が長くかかり、このためモートル３が停止す
るのに長い時間必要とした。 Conventionally, switch 2 was used to stop the motor.
Even when the brake was switched from ON to OFF, current continued to flow through the electromagnetic brake 4 for a long time due to the back electromotive force from the motor 3. Since the non-excitation type electromagnetic brake 4 does not brake when current is flowing, it takes a long time to start braking, and therefore it takes a long time for the motor 3 to stop.
従つて、本発明の目的は、モートル３とブレー
キ用電源が共通電源であるものにおいて、モート
ル３の電源を断つた際にモートル３からの逆起電
力があつても電磁ブレーキ４が速やかに作動させ
る無励磁作動形電磁ブレーキ用電源装置を提供す
ることである。 Therefore, an object of the present invention is to quickly operate the electromagnetic brake 4 even if there is a back electromotive force from the motor 3 when the power to the motor 3 is cut off, in a system where the motor 3 and the brake power source share a common power source. It is an object of the present invention to provide a power supply device for a non-excited electromagnetic brake that allows
本発明を図示実施例を参照して以下に詳細に説
明する。 The invention will be explained in more detail below with reference to illustrated embodiments.
第３図は本発明の無励磁作動形電磁ブレーキ用
電源装置１３の構成を示すブロツク図である。モ
ートル端子電圧検出回路１０はモートル端子電圧
ＥAを検出し、ある一定値（ＥOFFとする）以下か
否かを判別する。動作停止回路１１はモートル端
子電圧検出回路１０の出力によりその状態が変り
モートル端子電圧がＥOFFより上ならば動作せず
ＥOFF以下ならば動作する。電圧制御回路１２は
動作停止回路１１が動作している状態及び動作し
ていない状態に対応してそれぞれ０ボルト及びＥ
Bボルトのブレーキ用電圧ＥBを出力する。すなわ
ち、モートル端子電圧ＥAがある一定値以下にな
ると動作停止回路１１を作動し、電圧制御回路１
２の動作を停止させ０ボルトの電磁ブレーキ用電
圧ＥBを出力し、直前に電磁ブレーキを作動せし
めるのである。 FIG. 3 is a block diagram showing the structure of the non-excitation type electromagnetic brake power supply device 13 of the present invention. The motor terminal voltage detection circuit 10 detects the motor terminal voltage E A and determines whether it is less than a certain value (defined as E OFF ). The operation stop circuit 11 changes its state according to the output of the motor terminal voltage detection circuit 10, and does not operate if the motor terminal voltage is higher than E OFF and operates if it is lower than E OFF . The voltage control circuit 12 outputs 0 volts and E in response to the operating and non-operating states of the operation stop circuit 11, respectively.
Outputs the brake voltage E B of B volts. That is, when the motor terminal voltage E A becomes less than a certain value, the operation stop circuit 11 is activated, and the voltage control circuit 1 is activated.
2 is stopped, the electromagnetic brake voltage E B of 0 volts is output, and the electromagnetic brake is activated immediately before.
第４図は本発明の実施例である。２０，２１，
２２及び２３はそれぞれ交流電源、スイツチ、モ
ートル及び電磁ブレーキである。２４，２５及び
２６はそれぞれ電圧制御回路、モートル電圧検出
回路及び動作停止回路である。第４図の本発明の
実施例の各部の動作波形図を示す第５図を参照し
て実施例について説明する。まず、第４図のスイ
ツチ２１がONの時にはモートル端子電圧ＥAは白
抜矢印コ−ア間電圧で第５図Ａのように正弦波状
に変化している。このモートル端子電圧ＥAはモ
ートル電圧検出回路２５中のダイオードＤ６で整
流され第１抵抗である抵抗Ｒ１１と第２抵抗であ
る抵抗Ｒ１２とにより分割されるので、第４図の
矢印オ−エ間電圧は第５図Ｅに示すような負の半
波電圧となる。このオ−エ間電圧がしきい値で開
閉する素子の一つである定電圧ダイオードZD３
の降伏電圧より大きくなると矢印カ−エ間電圧は
矢印オ−エ間電圧とZD３の降伏電圧との差とな
る。逆に、矢印オ−エ間電圧が定電圧ダイオード
ZD３の降伏電圧より小さい場合には直流電圧Ｅ
から抵抗Ｒ１３を介してトランジスタＴ２のベー
ス・エミツタ間に電流が流れるので矢印カ−エ間
電圧は第５図Ｆに示すように僅かに正の電圧とな
る。このカ−エ電圧が正の時にはトランジスタＴ
２はONであり、負の時にはOFFとなるため矢印
キ−エ間電圧は第５図Ｇのようになる。更に、こ
のキ−エ間電圧が正の時にはトランジスタＴ３は
ONであるが０ボルトの時にはトランジスタＴ３
はOFFであるのでコンデンサＣ９に電源Ｅから
抵抗Ｒ１５を介して充電々流が流れ、ク−エ間電
圧は第５図のＨのように変化する。また、このク
−エ間電圧が定電圧ダイオードZD４の降伏電圧
より高くなるとトランジスタＴ４のベース・エミ
ツタ間に電流が流れるが、トランジスタＴ３が
ON−OFFを繰返しているために矢印ク−エ間電
圧はZD４の電圧より高くはならない。このた
め、動作停止回路２６であるトランジスタＴ４は
OFFとなつている。電圧制御回路２４における
矢印イ−エ間電圧はサイリスタTHY両端電圧を
ダイオードＤ４で整流した電圧であり第５図Ｂの
ような波形となる。このイ−エ間電圧が抵抗Ｒ５
を介してコンデンサＣ５を充電するため、矢印ウ
−エ間電圧は第５図Ｃのようになる。矢印ウ−エ
間電圧がトリガーダイオードTDのトリガー電圧
に達した時、コンデンサＣ５の電荷はトリガーダ
イオードTD、サイリスタTHYのゲート及びカー
ドを介して放電する。この時サイリスタTHYが
ONになりブレーキ用電圧ＥBである矢印エ−コ間
電圧は第５図Ｄのようになる。 FIG. 4 shows an embodiment of the present invention. 20, 21,
22 and 23 are an AC power source, a switch, a motor, and an electromagnetic brake, respectively. 24, 25, and 26 are a voltage control circuit, a motor voltage detection circuit, and an operation stop circuit, respectively. An embodiment will be described with reference to FIG. 5, which shows an operation waveform diagram of each part of the embodiment of the present invention shown in FIG. First, when the switch 21 in FIG. 4 is ON, the motor terminal voltage E A is the voltage between the cores shown by the white arrow and changes in a sinusoidal manner as shown in FIG. 5A. This motor terminal voltage E A is rectified by the diode D6 in the motor voltage detection circuit 25 and divided by the first resistor R11 and the second resistor R12. The voltage becomes a negative half-wave voltage as shown in FIG. 5E. Constant voltage diode ZD3, which is one of the elements that opens and closes at the threshold voltage between O and E.
When the voltage becomes larger than the breakdown voltage of ZD3, the voltage between arrow KA and E becomes the difference between the voltage between arrow OE and ZD3. Conversely, the voltage between the arrows OE and OE is the constant voltage diode.
If it is smaller than the breakdown voltage of ZD3, the DC voltage E
Since a current flows between the base and emitter of the transistor T2 through the resistor R13, the voltage between the arrows C and E becomes a slightly positive voltage as shown in FIG. 5F. When this Carae voltage is positive, the transistor T
2 is ON, and when it is negative, it is OFF, so the voltage between the arrow key and the key becomes as shown in FIG. 5G. Furthermore, when this key voltage is positive, the transistor T3 is
When it is ON but at 0 volts, transistor T3
Since is OFF, a charging current flows from the power source E to the capacitor C9 via the resistor R15, and the voltage between the two changes as indicated by H in FIG. Furthermore, when this voltage between the transistor T3 and the voltage becomes higher than the breakdown voltage of the constant voltage diode ZD4, a current flows between the base and emitter of the transistor T4.
Since ON-OFF is repeated, the voltage between arrow Q and Q does not become higher than the voltage of ZD4. Therefore, the transistor T4, which is the operation stop circuit 26,
It is set to OFF. The voltage between arrow A and A in the voltage control circuit 24 is a voltage obtained by rectifying the voltage across the thyristor THY by the diode D4, and has a waveform as shown in FIG. 5B. This voltage between A and E is resistor R5
Since the capacitor C5 is charged through the capacitor C5, the voltage between arrow W and E becomes as shown in FIG. 5C. When the voltage between the arrows W and E reaches the trigger voltage of the trigger diode TD, the charge in the capacitor C5 is discharged through the trigger diode TD, the gate of the thyristor THY, and the card. At this time, the thyristor THY
When the brake voltage E B is turned ON, the voltage between the arrow E and the arrow E B becomes as shown in Fig. 5D.
次に、第４図のスイツチ２１をOFFにした
後、モートル端子電圧ＥAがある一定値以下にな
つた第５図の時刻TN以後を考える。この時、モ
ートル電圧検出回路２５における矢印オ−エ間電
圧は定電圧ダイオードZD３の降伏電圧より常に
小さいために、トランジスタＴ２は常にONであ
り、トランジスタＴ３は常にOFFとなる。従つ
て矢印ク−エ間電圧は第５図Ｈのように定電圧ダ
イオードZD４の降伏電圧より高くなり、動作停
止回路２６であるトランジスタＴ４が第５図Ｉに
示すように時刻T0でONになる。このため抵抗Ｒ
５を流れる電流はすべてトランジスタＴ４のコレ
クタ・エミツタ間を通つて流れるので、コンデン
サＣ５には電圧が印加されない。したがつてトリ
ガーダイオードTD、サイリスタTHY共にOFFで
あり、ブレーキ用電圧ＥBは０ボルトとなる。 Next, consider what happens after time TN in FIG. 5 when the motor terminal voltage E A becomes below a certain value after the switch 21 in FIG. 4 is turned off. At this time, since the voltage between the arrows OE and OE in the motor voltage detection circuit 25 is always smaller than the breakdown voltage of the constant voltage diode ZD3, the transistor T2 is always ON and the transistor T3 is always OFF. Therefore, the voltage between the arrows Q and Q becomes higher than the breakdown voltage of the constant voltage diode ZD4 as shown in FIG . Become. Therefore, the resistance R
Since all the current flowing through C5 flows through the collector-emitter of transistor T4, no voltage is applied to capacitor C5. Therefore, both the trigger diode TD and the thyristor THY are OFF, and the brake voltage E B becomes 0 volts.
第６図は、本発明のブレーキ用電源装置１３を
第１図のブレーキ用電源装置６として動作させた
場合の装置各部の動作波形を示す図である。前述
のように、第１図のスイツチ２を第６図の時刻Ｔ
OFFでONからOFFに切換えても、モートル端子
電圧ＥAは減衰交流電圧となるために時刻ＴOFFに
おいてはモートル電圧検出回路１０は依然として
一定電圧以上を判別したままの状態から変化せ
ず、そのため動作停止回路１１及び電圧制御回路
１２の動作も変化せず電磁ブレーキ用電圧ＥBは
印加されたままの状態である。その後モートル端
子電圧ＥAが一定電圧ＥOFFになると、モートル電
圧検出回路１０はモートル端子電圧ＥAが一定値
以下になつたことを時刻T0において判別する。
このため時刻T0以後は動作停止回路１１が動作
し、電圧制御回路１２が非動作となり、電磁ブレ
ーキ用電圧ＥBが０ボルトになる。このように、
モートル端子電圧ＥAが０ボルトになる前に無励
磁状態で制動動作する電磁ブレーキ用電圧ＥBが
０ボルトになるために、スイツチをOFFにして
から電磁ブレーキが動作するまでの時間を短くす
ることができるのである。 FIG. 6 is a diagram showing operating waveforms of various parts of the device when the brake power supply device 13 of the present invention is operated as the brake power supply device 6 of FIG. 1. As mentioned above, switch 2 in FIG. 1 is set at time T in FIG.
Even if it is switched from ON to OFF with OFF, the motor terminal voltage E A becomes an attenuated AC voltage, so at time T OFF , the motor voltage detection circuit 10 does not change from the state where it still determines that the voltage is above a certain voltage. The operations of the operation stop circuit 11 and the voltage control circuit 12 do not change either, and the electromagnetic brake voltage E B remains applied. Thereafter, when the motor terminal voltage E A becomes the constant voltage E OFF , the motor voltage detection circuit 10 determines at time T 0 that the motor terminal voltage E A has become below the constant value.
Therefore, after time T0 , the operation stop circuit 11 is activated, the voltage control circuit 12 is deactivated, and the electromagnetic brake voltage E B becomes 0 volts. in this way,
The electromagnetic brake voltage E B , which performs braking in a non-excited state, reaches 0 volts before the motor terminal voltage E A reaches 0 volts, so shorten the time from when the switch is turned OFF until the electromagnetic brake operates. It is possible.
本発明の効果としては、前記のようにスイツチ
OFF後電磁ブレーキを早く動作する電磁ブレー
キ用電源装置が得られることが挙げられる。 As an effect of the present invention, as mentioned above, the switch
One of the advantages is that an electromagnetic brake power supply device that operates the electromagnetic brake quickly after being turned off can be obtained.
第１図は通常の電磁ブレーキの使用方法を示す
図。第２図はモートル端子電圧の減衰特性を示す
図。第３図は本発明の電磁ブレーキ用電源装置を
示すブロツク図。第４図は本発明の実施例を示す
図。第５図は本発明の実施例の各部の動作波形を
示す図。第６図は本発明の実施例を通常の電磁ブ
レーキ用電源装置として使用した場合の各部の動
作波形を示す図。
１，２０：交流電源、２，２１：スイツチ、
３，２２：モートル、４，２３：電磁ブレーキ、
６，１３：電磁ブレーキ用電源装置、１０，２
５：モートル電圧検出回路、１１，２６：動作停
止回路、１２，２４：電圧制御回路。
FIG. 1 is a diagram showing how to use a normal electromagnetic brake. FIG. 2 is a diagram showing the attenuation characteristics of motor terminal voltage. FIG. 3 is a block diagram showing the electromagnetic brake power supply device of the present invention. FIG. 4 is a diagram showing an embodiment of the present invention. FIG. 5 is a diagram showing operating waveforms of each part of the embodiment of the present invention. FIG. 6 is a diagram showing operating waveforms of various parts when the embodiment of the present invention is used as a normal electromagnetic brake power supply device. 1, 20: AC power supply, 2, 21: switch,
3, 22: Motor, 4, 23: Electromagnetic brake,
6, 13: Electromagnetic brake power supply device, 10, 2
5: Motor voltage detection circuit, 11, 26: Operation stop circuit, 12, 24: Voltage control circuit.
Claims (1)
ブレーキを作動するモートルと共通電源の電磁ブ
レーキ用電源装置であつて、モートル端子電圧を
検出し一定値以下に下がつたことを判別するモー
トル電圧検出回路と、該モートル電圧検出回路か
らの出力により電圧制御回路の動作を制御する動
作停止回路と、該動作停止回路からの出力により
無励磁作動形電磁ブレーキの作動させるべくブレ
ーキ印加電圧を零にする電圧制御回路とから成
り、前記電圧制御回路と前記電磁ブレーキとの直
列回路が前記モートルの両端に接続され、前記モ
ートル電圧検出回路は、前記電圧制御回路の両端
に直列に接続された第１抵抗および第２抵抗と、
前記第１の抵抗と前記第２の抵抗との接続点に直
列に接続されたしきい値で開閉する素子とからな
る回路を有し、かつ前記電圧制御回路に並列に接
続されることを特徴とする電磁ブレーキ用電源装
置。1. An electromagnetic brake power supply device that uses a common power source with the motor to stop the rotation of the motor and activate a non-excitation type electromagnetic brake, and a motor voltage detection device that detects the motor terminal voltage and determines when it has fallen below a certain value. a circuit, an operation stop circuit that controls the operation of the voltage control circuit by the output from the motor voltage detection circuit, and a brake applied voltage that is set to zero in order to operate the non-excitation type electromagnetic brake by the output from the operation stop circuit. a voltage control circuit, a series circuit of the voltage control circuit and the electromagnetic brake is connected to both ends of the motor, and the motor voltage detection circuit includes a first resistor connected in series to both ends of the voltage control circuit. and a second resistor;
A circuit comprising an element that opens and closes at a threshold value connected in series to a connection point between the first resistor and the second resistor, and connected in parallel to the voltage control circuit. A power supply device for electromagnetic brakes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9157177A JPS5426415A (en) | 1977-07-30 | 1977-07-30 | Power unit for electromagnetic brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9157177A JPS5426415A (en) | 1977-07-30 | 1977-07-30 | Power unit for electromagnetic brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5426415A JPS5426415A (en) | 1979-02-28 |
| JPS6111074B2 true JPS6111074B2 (en) | 1986-04-01 |
Family
ID=14030205
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9157177A Granted JPS5426415A (en) | 1977-07-30 | 1977-07-30 | Power unit for electromagnetic brake |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5426415A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57209793A (en) * | 1981-06-19 | 1982-12-23 | Hitachi Seiko Ltd | Monitoring device for welding |
-
1977
- 1977-07-30 JP JP9157177A patent/JPS5426415A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5426415A (en) | 1979-02-28 |
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