JPS61192635U - - Google Patents
Info
- Publication number
- JPS61192635U JPS61192635U JP7825785U JP7825785U JPS61192635U JP S61192635 U JPS61192635 U JP S61192635U JP 7825785 U JP7825785 U JP 7825785U JP 7825785 U JP7825785 U JP 7825785U JP S61192635 U JPS61192635 U JP S61192635U
- Authority
- JP
- Japan
- Prior art keywords
- motor
- braking
- turned
- detection means
- drive transistor
- 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 5
- 230000005856 abnormality Effects 0.000 claims 3
- 230000002159 abnormal effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
Landscapes
- Protection Of Generators And Motors (AREA)
Description
第１図は本考案検出装置の一実施例を示す回路
図、第２図は従来の駆動回路の一例を示す回路図
、第３図はタイムチヤートである。
図において、１はモータ、２，４，７はトラン
ジスタ、３，６，１１，１４は抵抗、５はアンド
ゲート、８はバツフア、１２は発光ダイオード、
１３はホトトランジスタ、１５，１６はナンドゲ
ート、１７はインバートノアゲートである。
FIG. 1 is a circuit diagram showing an embodiment of the detection device of the present invention, FIG. 2 is a circuit diagram showing an example of a conventional drive circuit, and FIG. 3 is a time chart. In the figure, 1 is a motor, 2, 4, 7 are transistors, 3, 6, 11, 14 are resistors, 5 is an AND gate, 8 is a buffer, 12 is a light emitting diode,
13 is a phototransistor, 15 and 16 are NAND gates, and 17 is an inverted NOR gate.
Claims (1)
を駆動する時にオンされ、制御する時にオフされ
る駆動トランジスタと、該駆動トランジスタとモ
ータの接続点とアースとの間に接続され、モータ
の制動時にオンされる制動トランジスタと制動抵
抗の直列回路と、該制動回抵抗と並列に接続され
た発光ダイオードと、該発光ダイオードにより照
射されるホトトランジスタと、該ホトトランジス
タに流れる電流を検出する検出手段と、該検出手
段の検出々力と制動時でないことを示す信号との
論理積をとり、異常信号を発生する第１論理手段
と、制動開始時から所定時間経過した後に前記検
出手段の検出々力がある時に異常信号を発生する
第２論理手段とを備えてなるモータ駆動回路の異
常検出装置。 A motor, a drive transistor connected in series with the motor and turned on when driving the motor and turned off when controlling the motor, and a drive transistor connected between the connection point of the drive transistor and the motor and ground, and when braking the motor. A series circuit of a braking transistor and a braking resistor to be turned on, a light emitting diode connected in parallel with the braking circuit resistor, a phototransistor illuminated by the light emitting diode, and a detection means for detecting a current flowing through the phototransistor. , a first logical means for generating an abnormal signal by logically multiplying the force detected by the detection means and a signal indicating that braking is not being performed, and the force detected by the detection means after a predetermined time has elapsed from the start of braking An abnormality detection device for a motor drive circuit, comprising: second logic means for generating an abnormality signal when an abnormality signal occurs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7825785U JPS61192635U (en) | 1985-05-24 | 1985-05-24 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7825785U JPS61192635U (en) | 1985-05-24 | 1985-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61192635U true JPS61192635U (en) | 1986-11-29 |
Family
ID=30622073
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7825785U Pending JPS61192635U (en) | 1985-05-24 | 1985-05-24 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61192635U (en) |
-
1985
- 1985-05-24 JP JP7825785U patent/JPS61192635U/ja active Pending
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