JPH03180U - - Google Patents
Info
- Publication number
- JPH03180U JPH03180U JP768289U JP768289U JPH03180U JP H03180 U JPH03180 U JP H03180U JP 768289 U JP768289 U JP 768289U JP 768289 U JP768289 U JP 768289U JP H03180 U JPH03180 U JP H03180U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- resistor
- thyristor
- microcomputer
- series 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.)
- Pending
Links
- 230000008054 signal transmission Effects 0.000 claims 1
- 230000001960 triggered effect Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Magnetically Actuated Valves (AREA)
Description
第１図は本考案の実施例を示す回路図、第２図
は同実施例における抵抗５両端の電圧波形図、第
３図ａはホトダイオード１１ａの電流波形図、第
３図ｂはホトトランジスタ１１ｂのコレクタ電圧
波形図である。
１……商用電源、２……全波整流器、３……サ
イリスタ、４……コイル、５……抵抗、８……演
算増幅器、１１，１８……ホトカプラ、２４……
マイクロコンピユータ。
Fig. 1 is a circuit diagram showing an embodiment of the present invention, Fig. 2 is a voltage waveform diagram across the resistor 5 in the same embodiment, Fig. 3a is a current waveform diagram of the photodiode 11a, and Fig. 3b is a phototransistor 11b. FIG. 3 is a collector voltage waveform diagram of FIG. 1... Commercial power supply, 2... Full wave rectifier, 3... Thyristor, 4... Coil, 5... Resistor, 8... Operational amplifier, 11, 18... Photocoupler, 24...
microcomputer.
Claims (1)
源を流量制御弁のコイルおよび抵抗の直列回路に
接続し、マイクロコンピユータの電源と絶縁され
た電源が供給される電圧電流変換器により、前記
抵抗の両端に現われる電圧に比例する電流をホト
カプラの発光ダイオードに流し、前記ホトカプラ
のホトトランジスタと抵抗の直列回路に商用電源
と絶縁された直流電源を接続し、前記直列回路に
現われる電圧をマイクロコンピユータに入力し、
該入力値により算出されるコイル電流がコイル電
流の設定値に一致するように前記マイクロコンピ
ユータが前記サイリスタの制御角を算出し、該制
御角に基ずき絶縁信号伝達素子を介して前記サイ
リスタをトリガーさせることを特徴とする流量制
御弁のコイル電流供給回路。 A DC power supply whose phase is controlled by a thyristor is connected to the coil of the flow control valve and a series circuit of a resistor, and a voltage-current converter, which is supplied with a power isolated from the power supply of the microcomputer, connects both ends of the resistor. A current proportional to the voltage appearing is passed through a light emitting diode of a photocoupler, a DC power supply isolated from a commercial power supply is connected to a series circuit of a phototransistor and a resistor of the photocoupler, and the voltage appearing in the series circuit is input to a microcomputer;
The microcomputer calculates a control angle of the thyristor so that the coil current calculated based on the input value matches the set value of the coil current, and controls the thyristor based on the control angle via an insulated signal transmission element. A coil current supply circuit for a flow control valve characterized by being triggered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP768289U JPH03180U (en) | 1989-01-27 | 1989-01-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP768289U JPH03180U (en) | 1989-01-27 | 1989-01-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03180U true JPH03180U (en) | 1991-01-07 |
Family
ID=31511337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP768289U Pending JPH03180U (en) | 1989-01-27 | 1989-01-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03180U (en) |
-
1989
- 1989-01-27 JP JP768289U patent/JPH03180U/ja active Pending