JPS624050Y2 - - Google Patents
Info
- Publication number
- JPS624050Y2 JPS624050Y2 JP14749180U JP14749180U JPS624050Y2 JP S624050 Y2 JPS624050 Y2 JP S624050Y2 JP 14749180 U JP14749180 U JP 14749180U JP 14749180 U JP14749180 U JP 14749180U JP S624050 Y2 JPS624050 Y2 JP S624050Y2
- Authority
- JP
- Japan
- Prior art keywords
- electromagnetic
- brake
- switch
- rectifier
- 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
- 230000005284 excitation Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
Description
【考案の詳細な説明】
本考案は、電力消費が少なく、維持コストの安
い直流電磁ブレーキの電気回路に関する。[Detailed Description of the Invention] The present invention relates to an electrical circuit for a DC electromagnetic brake that consumes less power and is inexpensive to maintain.
直流電磁ブレーキは、クレーン等の捲上げ機、
圧延棒等のロールガング等、頻繁に正転、逆転を
繰り返す機構に用いられている。このような機器
にあつては、静止時は、バネの力によりブレーキ
シユーを押しつけて、ブレーキを常時効かしてお
き、運転時には、モーターの駆動開始と同期し
て、ブレーキコイルに電流を流し、磁力により、
バネの力に打ち勝つてブレーキシユーを離すよう
になつている。第１図に一般に用いられている電
磁ブレーキの電気回路を示す。 DC electromagnetic brakes are used for hoisting machines such as cranes,
It is used in mechanisms that frequently rotate forward and reverse, such as roll gangs of rolling rods. When such equipment is stationary, the brake shoe is pressed by the force of a spring to keep the brakes applied at all times, and when the equipment is in operation, a current is applied to the brake coil in synchronization with the start of the motor. , due to magnetic force,
The brake shoe is released by overcoming the force of the spring. FIG. 1 shows the electrical circuit of a commonly used electromagnetic brake.
即ち、整流器２、減流抵抗３と、電磁開閉器４
の並列回路および、電磁ブレーキコイル５と放電
抵抗６の並列回路を直列に接続した直流閉回路を
形成し、整流器２には、操作スイツチ１を経て交
流電源を接続したものである。 That is, a rectifier 2, a current reducing resistor 3, and an electromagnetic switch 4
A parallel circuit of , and a parallel circuit of an electromagnetic brake coil 5 and a discharge resistor 6 are connected in series to form a DC closed circuit, and the rectifier 2 is connected to an AC power source via an operating switch 1.
操作スイツチ１を閉じると、電磁開閉器４も閉
じ、電磁ブレーキコイル５に電流が流れ、電磁石
を励磁し、ブレーキシユーをバネに打ち勝つて開
放する。電磁石による磁性体吸引力は距離に反比
例するので、密着してしまうと、磁力はきわめて
小さくてよい。従つて電流も小さくてよく、その
為、ブレーキ開放後、図示しないタイマーによる
僅かな時間を置いて、自動的に電磁スイツチ４が
開になるようにしておき、減流抵抗３によりコイ
ル５に流れる電流を小さくしている。 When the operating switch 1 is closed, the electromagnetic switch 4 is also closed, current flows through the electromagnetic brake coil 5, energizes the electromagnet, and opens the brake shoe by overcoming the spring. The magnetic attraction force of an electromagnet is inversely proportional to the distance, so once they are in close contact, the magnetic force only needs to be extremely small. Therefore, the current only needs to be small. Therefore, after the brake is released, a timer (not shown) is used to automatically open the electromagnetic switch 4 for a short period of time, and the current flows through the coil 5 through the current reducing resistor 3. It reduces the current.
放電抵抗６は、停止の際、スイツチを切つた後
も、コイルに残つて励磁力を保持してブレーキの
効きを悪くする残留電気エネルギーをコイルから
流出させる為の短絡抵抗である。 The discharge resistor 6 is a short-circuit resistor for draining residual electrical energy from the coil, which remains in the coil even after the switch is turned off at the time of stopping and maintains the excitation force, thereby reducing the effectiveness of the brake.
この種の従来方式の回路の欠点は、減流抵抗に
発熱損失があることおよび電磁開閉スイツチ４
が、直流回路にあつて、アークによる接点の溶損
が激しく、寿命が短いことなどである。 The disadvantages of this type of conventional circuit are that there is heat loss in the current reducing resistor and that the electromagnetic switch 4
However, in DC circuits, the contacts are severely damaged by arcing and have a short lifespan.
考案者は上記欠点を排除する為に本考案をなし
たものである。 The inventor devised the present invention in order to eliminate the above-mentioned drawbacks.
即ち、本考案は電磁ブレーキに整流器２個を直
列に接続して、直流閉回路を形成し、その一方の
整流器にはタイマー作動の電磁開閉器を通じて、
また他方の整流器には減圧トランスを通じて、操
作用交流電源スイツチに接続したことを特徴とす
る直流電磁ブレーキの電気回路である。 That is, in the present invention, two rectifiers are connected in series to an electromagnetic brake to form a DC closed circuit, and one of the rectifiers is connected through a timer-operated electromagnetic switch.
The other rectifier is an electrical circuit for a DC electromagnetic brake, characterized in that it is connected to an operating AC power switch through a pressure reducing transformer.
本考案の電気回路を第２図に示す。第２図にお
いてスイツチ１を閉じると電磁スイツチ９が閉
じ、整流器２によつて整流された直流が励磁コイ
ル５に流れ、電磁石（記載せず）を強励磁し、ブ
レーキシユーを、バネに打ち勝つて開放する。 The electric circuit of the present invention is shown in FIG. In Fig. 2, when the switch 1 is closed, the electromagnetic switch 9 is closed, and the DC rectified by the rectifier 2 flows into the excitation coil 5, strongly exciting the electromagnet (not shown), and the brake shoe overcomes the spring. and open it.
ブレーキ開放後は直ちに、タイマー作動によ
り、電磁スイツチ９が自動的に開になり電流は、
トランス８の方に流れ減圧され、次いで整流器７
で整流され、整流器２を経て励磁コイル５に到
り、電磁石５を弱励磁する。なお、第２図におい
て電磁スイツチ９と減圧トランス８は、位置を入
れ替えても同じである。かく回路を構成すること
により、従来、減流抵抗３に生じていた発熱損失
を、交流減圧トランス８におけるきわめて微少な
電力損失に変え、また、直流電磁スイツチ４も、
交流電磁スイツチ９に変えることができ、電力損
失が小さく、電磁スイツチの寿命の長い直流電磁
ブレーキ回路を得ることができた。 Immediately after the brake is released, the electromagnetic switch 9 is automatically opened by the timer operation, and the current is
Flows toward transformer 8 and is depressurized, then rectifier 7
It is rectified by the rectifier 2, reaches the excitation coil 5, and weakly excites the electromagnet 5. In FIG. 2, the electromagnetic switch 9 and the pressure reducing transformer 8 are the same even if their positions are switched. By configuring this circuit, the heat loss that conventionally occurred in the current reducing resistor 3 is changed to an extremely small power loss in the AC voltage reducing transformer 8, and the DC electromagnetic switch 4 also
It was possible to obtain a DC electromagnetic brake circuit that can be replaced with an AC electromagnetic switch 9, has low power loss, and has a long electromagnetic switch life.
第１図は従来の回路図、第２図は本考案の回路
図。
１……操作用電源スイツチ、２，７……整流
器、３……減流抵抗器、４，９……電磁スイツ
チ、５……電磁ブレーキ界磁コイル、６……放電
抵抗器、８……交流減圧トランス。
FIG. 1 is a conventional circuit diagram, and FIG. 2 is a circuit diagram of the present invention. 1... Operation power switch, 2, 7... Rectifier, 3... Current reducing resistor, 4, 9... Electromagnetic switch, 5... Electromagnetic brake field coil, 6... Discharge resistor, 8... AC pressure reducing transformer.
Claims (1)
流閉回路を形成し、その一方の整流器にはタイマ
ー作動の電磁開閉器を通じて、また他方の整流器
には減圧トランスを通じて、それぞれブレーキ操
作用交流電源スイツチに接続したことを特徴とす
る直流電磁ブレーキの電気回路。 Two rectifiers are connected in series to the electromagnetic brake to form a DC closed circuit, and one rectifier is connected to a timer-operated electromagnetic switch, and the other rectifier is connected to an AC power switch for brake operation through a pressure reducing transformer. An electric circuit for a DC electromagnetic brake characterized by being connected to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14749180U JPS624050Y2 (en) | 1980-10-15 | 1980-10-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14749180U JPS624050Y2 (en) | 1980-10-15 | 1980-10-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5769755U JPS5769755U (en) | 1982-04-27 |
| JPS624050Y2 true JPS624050Y2 (en) | 1987-01-29 |
Family
ID=29507009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14749180U Expired JPS624050Y2 (en) | 1980-10-15 | 1980-10-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS624050Y2 (en) |
-
1980
- 1980-10-15 JP JP14749180U patent/JPS624050Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5769755U (en) | 1982-04-27 |
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