JPH045146Y2 - - Google Patents
Info
- Publication number
- JPH045146Y2 JPH045146Y2 JP16370184U JP16370184U JPH045146Y2 JP H045146 Y2 JPH045146 Y2 JP H045146Y2 JP 16370184 U JP16370184 U JP 16370184U JP 16370184 U JP16370184 U JP 16370184U JP H045146 Y2 JPH045146 Y2 JP H045146Y2
- Authority
- JP
- Japan
- Prior art keywords
- motor
- circuit
- brake
- relay
- fuse
- 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
- 238000003384 imaging method Methods 0.000 claims description 5
- 238000001514 detection method Methods 0.000 description 6
- 230000007246 mechanism Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000003990 capacitor Substances 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
Landscapes
- Apparatus For Radiation Diagnosis (AREA)
Description
【考案の詳細な説明】
〔考案の利用分野〕
本考案は、Ｘ線透視撮影台の姿勢制御回路に係
り、特にモータ駆動方式による姿勢制御機構にお
いて、モータのブレーキ回路の故障が原因で発生
するトラブルの防止に好適なモータ駆動制御回路
の改良に関するものである。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a posture control circuit for an X-ray fluoroscopic imaging table, and in particular, in a posture control mechanism using a motor drive method, the problem occurs due to a failure of the motor's brake circuit. The present invention relates to an improvement of a motor drive control circuit suitable for preventing troubles.
Ｘ線透視撮影台においては、従来から、モータ
駆動方式による姿勢制御駆動機構が広く用いられ
ている。この駆動方式では、装置の限界停止位置
における停止動作や操作器の操作によつて装置を
停止させるとき、装置の慣性力を吸収して制動さ
せるために、ブレーキを設けることが行われてい
る。このブレーキ方式にはモータにおいて電気的
な発電制動（いわゆるダイナミツクブレーキ）を
行う方法と機構内に電磁ブレーキを設ける方法の
２通りがある。これらの２つの方式において、ブ
レーキ回路に故障が生ずると制動機能が損われ、
装置の動作のオーバランが起きて、装置に損傷を
招いたり、被検者の身体上の安全面に問題を生ず
るような欠点があつた。
2. Description of the Related Art In X-ray fluoroscopic imaging tables, posture control drive mechanisms based on a motor drive system have been widely used. In this drive system, a brake is provided in order to absorb the inertial force of the device and brake it when the device is stopped by a stopping operation at the limit stop position of the device or by operation of an operating device. There are two types of braking methods: a method in which electric dynamic braking (so-called dynamic braking) is performed in the motor, and a method in which an electromagnetic brake is provided within the mechanism. In these two methods, if a failure occurs in the brake circuit, the braking function will be impaired;
There were drawbacks such as overruns in the operation of the device, which could cause damage to the device and pose problems to the physical safety of the subject.
本考案の目的は、透視撮影台の姿勢制御用のモ
ータの駆動制御回路において、ブレーキ回路に生
ずる故障、例えば、ダイナミツクブレーキ回路内
の整流ダイオードのシヨートモード不良又は短絡
事故並びに電磁ブレーキ回路のブレーキコイル短
絡等のブレーキ回路の故障を検出して、ブレーキ
不作動により生ずるトラブルを防止し、安全性に
優れた透視撮影台を提供することにある。
The purpose of this invention is to prevent failures that occur in the brake circuit in the drive control circuit of the motor for attitude control of a fluoroscopic imaging platform, such as short-circuit failure or short-circuit failure of the rectifier diode in the dynamic brake circuit, and the brake coil of the electromagnetic brake circuit. It is an object of the present invention to provide a highly safe fluoroscopic photographing stand that detects failures in the brake circuit such as short circuits and prevents troubles caused by non-operation of the brakes.
前記目的を達成するために、ブレーキ回路内の
整流ダイオードのシヨートモード不良、又は電磁
ブレーキの短絡事故に対して検出手段を設けるこ
とが有効であるが、その検出手段としては、過電
流リレー、電流検出リレーなどが知られているが
高価である。また、一般的なヒユーズは、ブレー
キ回路そのものの保護はできるが、出力手段を有
していないという問題がある。
In order to achieve the above objective, it is effective to provide a detection means for short-circuit failure of the rectifier diode in the brake circuit or a short-circuit accident of the electromagnetic brake. Relays are known, but they are expensive. Further, although a general fuse can protect the brake circuit itself, there is a problem in that it does not have an output means.
そこで本考案者は、ブレーキ回路に前記検出手
段として警報接点出力付ヒユーズを組み込めば従
来装置の改良を計ることが可能となる点に着目し
たものである。 Therefore, the inventor of the present invention has focused on the point that it is possible to improve the conventional device by incorporating a fuse with an alarm contact output as the detection means in the brake circuit.
以下、本考案の一実施例を図面によつて説明す
る。添付図面は、透視撮影台の姿勢制御用３相誘
導電動機の駆動制御回路のダイナミツクブレーキ
回路に本考案を適用した一実施例を示す。前記駆
動制御回路はモータＭと、モータへの電源供給と
モータの回転方向を制御する制御回路と、モータ
に制動力を与えるブレーキ回路とから構成されて
いる。制御回路は、正回転用操作器S1と逆回転用
操作器S2、正回転限界検出リミツトスイツチLS1
と逆回転限界検出リミツトスイツチLS2、正回転
用交流リレーRy1と逆回転用交流リレーRy2で構
成され、ブレーキ回路はダイナミツクブレーキ印
加用交流リレーRy3と、正回転用交流リレーRy1
又は逆回転用交流リレーRy2の接点で付勢する直
流リレーDR1と、DR1の動作に時遅れを持たせる
ためのコンデンサC1と、該コンデンサC1からの
突入電流制限用抵抗R1と、ダイナミツクブレー
キ電圧調整用可変抵抗R2と、前記直流リレー
DR1の直流電源用整流器D1と、ダイナミツクブ
レーキ電源用整流器D2と警報接点付ヒユーズ
FU1とで構成される。また、制御回路にはモータ
保護用にヒユーズFU2，FU3，FU4が設けられて
いる。
An embodiment of the present invention will be described below with reference to the drawings. The accompanying drawings show an embodiment in which the present invention is applied to a dynamic brake circuit of a drive control circuit for a three-phase induction motor for attitude control of a fluoroscopic photographing table. The drive control circuit includes a motor M, a control circuit that supplies power to the motor and controls the direction of rotation of the motor, and a brake circuit that applies braking force to the motor. The control circuit includes a forward rotation actuator S 1 , a reverse rotation actuator S 2 , and a forward rotation limit detection limit switch LS 1.
The brake circuit consists of a reverse rotation limit detection limit switch LS 2 , a forward rotation AC relay Ry 1 , and a reverse rotation AC relay Ry 2.The brake circuit consists of an AC relay Ry 3 for dynamic brake application, and an AC relay Ry 1 for forward rotation.
Or a DC relay DR 1 energized by the contact of the AC relay Ry 2 for reverse rotation, a capacitor C 1 to provide a time delay in the operation of DR 1 , and a resistor R 1 for limiting the rush current from the capacitor C 1 . , variable resistor R2 for dynamic brake voltage adjustment, and the DC relay
Rectifier D 1 for DC power supply of DR 1 , rectifier D 2 for dynamic brake power supply and fuse with alarm contact
Consists of FU 1 . The control circuit is also provided with fuses FU 2 , FU 3 , and FU 4 for motor protection.
次に、本実施例の動作説明をする。正回転用操
作器S1を閉路することによつて正回転用交流リレ
ーRy1が付勢し、モータＭが正回転方向に回転す
る。このとき直流リレーDR1も付勢している。正
回転用操作器S1の操作をやめると、前記直流リレ
ーDR1はコンデンサC1によつて時間遅れをもつて
未励磁となる。その結果ダイナミツクブレーキ印
加用交流リレーRy3はこの時間遅れの間だけ付勢
する。前記交流リレーRy3の接点Ry3-aによりモ
ータＭに直流が印加され、ダイナミツクブレーキ
が働くのである。逆回転用操作器S2の操作によつ
てもモータＭの回転方向が前述と逆になる他は同
様にブレーキが作用する。 Next, the operation of this embodiment will be explained. By closing the forward rotation operating device S 1 , the forward rotation AC relay Ry 1 is energized, and the motor M rotates in the forward rotation direction. At this time, DC relay DR 1 is also energized. When the operation of the forward rotation operating device S 1 is stopped, the DC relay DR 1 becomes non-energized with a time delay due to the capacitor C 1 . As a result, the dynamic brake application AC relay Ry 3 is energized only during this time delay. Direct current is applied to the motor M by the contact Ry 3-a of the AC relay Ry 3 , and the dynamic brake is activated. By operating the reverse rotation operating device S2 , the brake is applied in the same manner, except that the direction of rotation of the motor M is reversed.
この回路で、もしもダイナミツクブレーキ電源
用整流器D2がシヨートモード不良となり、短絡
状態となつたとき、警報接点出力付ヒユーズFU1
が溶断し、警報接点FU1-aが閉路状態となり、該
ヒユーズFU1が溶断時に付勢する交流リレーRy4
が付勢する。その結果Ry4-bが開路状態となつ
て、前記操作器S1，S2を操作しても前記交流リレ
ーRy1，Ry2は付勢されず、モータＭは動かなく
なる。 In this circuit, if the rectifier D 2 for the dynamic brake power supply becomes short-circuited due to short-circuit mode failure, the fuse FU 1 with alarm contact output will be activated.
fuse fuses, alarm contact FU 1-a becomes closed, and AC relay Ry 4 energizes when fuse FU 1 melts.
is energized. As a result, Ry 4-b becomes open, and even if the actuators S 1 and S 2 are operated, the AC relays Ry 1 and Ry 2 are not energized, and the motor M does not move.
また、警報接点出力付ヒユーズFU1が溶断し、
交流リレーRy4が付勢すると、ブレーキ回路故障
表示灯１PLが点灯し、操作者にブレーキ回路の
異常を知らせる。この異常表示はブザーなどの音
による表示も可能である。 Additionally, fuse FU 1 with alarm contact output has blown.
When AC relay Ry 4 is energized, brake circuit failure indicator light 1PL lights up to notify the operator of an abnormality in the brake circuit. This abnormality indication can also be indicated by a sound such as a buzzer.
第２図に、電磁ブレーキMBMgを組込んだ回
路に本考案を適用した他の一実施例を示す。（説
明は省略する）
本実施例によれば、以上述べたように、モータ
のブレーキ回路が故障した場合に、モータが作動
しないという安全面での改善と、該故障の表示が
なされることによつて保守時の原因究明が容易と
なる利点がある。 FIG. 2 shows another embodiment in which the present invention is applied to a circuit incorporating an electromagnetic brake MBMg. (Description will be omitted) According to this embodiment, as described above, when the brake circuit of the motor fails, the motor does not operate, which is an improvement in terms of safety, and the failure is displayed. Therefore, there is an advantage that the cause can be easily investigated during maintenance.
以上述べたように、本考案によれば、ブレーキ
回路に故障が発生し、ダイナミツクブレーキ、又
は電磁ブレーキが動作し得ない状適となつたとき
には、電動機も動作不可能とする安全回路を構成
することができるので、安全性の優れた、電動機
による駆動機構を提供することが可能である。
As described above, according to the present invention, when a failure occurs in the brake circuit and the dynamic brake or electromagnetic brake becomes inoperable, a safety circuit is constructed that disables the electric motor as well. Therefore, it is possible to provide a drive mechanism using an electric motor with excellent safety.
第１図は三相誘導電動機のダイナミツクブレー
キ回路に本考案を適用した一実施例の回路図。第
２図は、電磁ブレーキを用いた制動機構に本考案
を適用した他の一実施例の回路図を示す。
S1……正回転用操作器、S2……逆回転用操作
器、LS1……正回転限界検出リミツトスイツチ、
LS2……逆回転限界検出リミツトスイツチ、Ry1
……正回転用交流リレー、Ry2……逆回転用交流
リレー、Ry3……直流ブレーキ印加用交流リレ
ー、Ry4……FU1が溶断時付勢する交流リレー、
DR1……Ry1，Ry2のａ接点で付勢する直流リレ
ー、C1……DR1とパラに入り、時遅れをもたせる
コンデンサ、R1……C1の突入電流制限用抵抗、
R2……直流ブレーキ電圧調整用可変抵抗、D1…
…DR1の直流電源用整流器、D2……直流ブレー
キ電源用整流器、Ｍ……モータ、FU1……警報接
点付ヒユーズ、FU2，FU3，FU4……モータ保護
用ヒユーズ、１PL……ブレーキ回路故障表示灯、
D2……モータ用電磁ブレーキ用整流器、MBMg
……モータ用電磁ブレーキ、T1……モータ用電
磁ブレーキ用変圧器。
FIG. 1 is a circuit diagram of an embodiment in which the present invention is applied to a dynamic brake circuit of a three-phase induction motor. FIG. 2 shows a circuit diagram of another embodiment in which the present invention is applied to a braking mechanism using an electromagnetic brake. S 1 ...Forward rotation operation device, S 2 ...Reverse rotation operation device, LS 1 ...Forward rotation limit detection limit switch,
LS 2 ……Reverse rotation limit detection limit switch, Ry 1
... AC relay for forward rotation, Ry 2 ... AC relay for reverse rotation, Ry 3 ... AC relay for DC brake application, Ry 4 ... AC relay that is energized when FU 1 blows out,
DR 1 ... DC relay energized by the a contacts of Ry 1 and Ry 2 , C 1 ... Capacitor connected in parallel with DR 1 to provide a time delay, R 1 ... Resistor for inrush current limiting of C 1 ,
R 2 ... Variable resistor for DC brake voltage adjustment, D 1 ...
...Rectifier for DC power supply of DR 1 , D 2 ...Rectifier for DC brake power supply, M ...Motor, FU 1 ...Fuse with alarm contact, FU 2 , FU 3 , FU 4 ...Fuse for motor protection, 1PL... …Brake circuit failure indicator light,
D 2 ... Rectifier for electromagnetic brake for motor, MBMg
...Electromagnetic brake for motor, T 1 ...Transformer for electromagnetic brake for motor.
Claims (1)
転方向を制御する回路と、モータへの電源の供給
を停止したときモータにブレーキを作動させるブ
レーキ回路とから成る透視撮影台のモータ駆動制
御回路において、前記ブレーキ回路に警報接点付
ヒユーズを設けて、該ブレーキ回路に故障が発生
した際には、該ヒユーズの警報出力接点によつて
モータが作動不可能となるように回路構成したこ
とを特徴とする透視撮影台のモータ駆動制御回
路。 In a motor drive control circuit for a fluoroscopic imaging stand, which includes a motor, a circuit that supplies power to the motor and controls the rotational direction of the motor, and a brake circuit that applies a brake to the motor when the power supply to the motor is stopped. , characterized in that the brake circuit is provided with a fuse with an alarm contact, and the circuit is configured such that when a failure occurs in the brake circuit, the motor cannot be operated by the alarm output contact of the fuse. Motor drive control circuit for a fluoroscopic imaging table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16370184U JPH045146Y2 (en) | 1984-10-31 | 1984-10-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16370184U JPH045146Y2 (en) | 1984-10-31 | 1984-10-31 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6180005U JPS6180005U (en) | 1986-05-28 |
| JPH045146Y2 true JPH045146Y2 (en) | 1992-02-14 |
Family
ID=30721561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16370184U Expired JPH045146Y2 (en) | 1984-10-31 | 1984-10-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH045146Y2 (en) |
-
1984
- 1984-10-31 JP JP16370184U patent/JPH045146Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6180005U (en) | 1986-05-28 |
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