JPS6188434U - - Google Patents
Info
- Publication number
- JPS6188434U JPS6188434U JP17315784U JP17315784U JPS6188434U JP S6188434 U JPS6188434 U JP S6188434U JP 17315784 U JP17315784 U JP 17315784U JP 17315784 U JP17315784 U JP 17315784U JP S6188434 U JPS6188434 U JP S6188434U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- transistor
- absence
- braking
- current
- 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 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Landscapes
- Protection Of Generators And Motors (AREA)
- Protection Of Static Devices (AREA)
- 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
図は従来のインバータ装置の発電制動回路の一例
を示す回路図である。
１…電磁接触器、２…整流器、３…コンデンサ
、４…制動抵抗器、５…直列抵抗器、６…トラン
ジスタ、７…放電電圧検出回路、８…インバータ
、９…交流電動機、１０…変流器、１３，１４，
１７…ＮＯＴ回路、１５，１９…ＡＮＤ回路、１
６…ＯＲ回路、１８…リレー。
Figure 1 is a circuit diagram showing one embodiment of the present invention;
The figure is a circuit diagram showing an example of a dynamic braking circuit of a conventional inverter device. 1... Magnetic contactor, 2... Rectifier, 3... Capacitor, 4... Braking resistor, 5... Series resistor, 6... Transistor, 7... Discharge voltage detection circuit, 8... Inverter, 9... AC motor, 10... Current transformation Vessel, 13, 14,
17...NOT circuit, 15, 19...AND circuit, 1
6...OR circuit, 18...relay.
Claims (1)
タで開閉する発電制動回路のトランジスタの故障
を検出して制動抵抗に過電流が連続して流れるの
を防止する発電制動回路の保護装置において、上
記トランジスタのコレクタ電流の有無およびベー
ス入力の有無を検出する検出回路と、上記コレク
タ電流の有無およびベース入力の有無から上記ト
ランジスタの故障を判別するロジツク回路と、上
記ロジツク回路の出力に応じて上記電動機の運転
を停止させるリレー回路を備えたことを特徴とす
る発電制動回路の保護装置。 In a protection device for a dynamic braking circuit that detects a failure of a transistor in a dynamic braking circuit that uses a transistor to open and close the braking current of a motor flowing through a braking resistor and prevents an overcurrent from continuously flowing through the braking resistor, the collector of the transistor a detection circuit that detects the presence or absence of current and the presence or absence of base input; a logic circuit that determines a failure of the transistor from the presence or absence of the collector current and the presence or absence of base input; and an operation of the motor according to the output of the logic circuit. A protection device for a dynamic braking circuit, characterized in that it is equipped with a relay circuit that stops the circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17315784U JPS6188434U (en) | 1984-11-16 | 1984-11-16 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17315784U JPS6188434U (en) | 1984-11-16 | 1984-11-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6188434U true JPS6188434U (en) | 1986-06-09 |
Family
ID=30730815
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17315784U Pending JPS6188434U (en) | 1984-11-16 | 1984-11-16 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6188434U (en) |
-
1984
- 1984-11-16 JP JP17315784U patent/JPS6188434U/ja active Pending