JPS6172091U - - Google Patents
Info
- Publication number
- JPS6172091U JPS6172091U JP15523784U JP15523784U JPS6172091U JP S6172091 U JPS6172091 U JP S6172091U JP 15523784 U JP15523784 U JP 15523784U JP 15523784 U JP15523784 U JP 15523784U JP S6172091 U JPS6172091 U JP S6172091U
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- switch
- detection circuit
- dynamic braking
- inverter
- 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
Links
- 238000001514 detection method Methods 0.000 claims description 4
- 230000006698 induction Effects 0.000 claims description 2
- 230000002265 prevention Effects 0.000 claims description 2
- 238000013021 overheating Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Stopping Of Electric Motors (AREA)
Description
第１図は本考案の一実施例を示す回路図、第２
図は従来の過熱防止装置を説明するための回路図
である。
２……整流器、３……インバータ、４……誘導
電動機、５……発電ブレーキ用抵抗、６……トラ
ンジスタ、７……過電圧検出回路、８……電磁開
閉器、１２……フオトカプラの入力ダイオード、
１３……フオトカプラの出力トランジスタ、１５
……タイマ回路、２０……コンパレータ、２１…
…リレー。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a circuit diagram for explaining a conventional overheat prevention device. 2... Rectifier, 3... Inverter, 4... Induction motor, 5... Resistor for dynamic brake, 6... Transistor, 7... Overvoltage detection circuit, 8... Electromagnetic switch, 12... Photocoupler input diode ,
13... Output transistor of photocoupler, 15
...Timer circuit, 20...Comparator, 21...
…relay.
Claims (1)
側にスイツチと直列接続で設けられ該直流側の電
圧が一定値を越えるときに該スイツチがオンされ
て該電動機側からの発電電流を吸収する発電ブレ
ーキ用抵抗によつて発電制動力を得るにおいて、
前記抵抗への電圧印加を検出する電圧検出回路と
、この電圧検出回路の検出信号が設定時間だけ継
続したときにインバータの直流電源しや断させる
制御手段とを設けたことを特徴とする発電ブレー
キ用抵抗の過熱防止装置。 For dynamic braking, which is connected in series with a switch on the DC side of a voltage source inverter that operates an induction motor, and when the voltage on the DC side exceeds a certain value, the switch is turned on to absorb the generated current from the motor side. In obtaining dynamic braking force through resistance,
A power generating brake characterized in that it is provided with a voltage detection circuit that detects the voltage applied to the resistor, and a control means that turns off the DC power supply of the inverter when the detection signal of the voltage detection circuit continues for a set time. Overheating prevention device for resistors.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15523784U JPS6172091U (en) | 1984-10-15 | 1984-10-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15523784U JPS6172091U (en) | 1984-10-15 | 1984-10-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6172091U true JPS6172091U (en) | 1986-05-16 |
Family
ID=30713232
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15523784U Pending JPS6172091U (en) | 1984-10-15 | 1984-10-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6172091U (en) |
-
1984
- 1984-10-15 JP JP15523784U patent/JPS6172091U/ja active Pending