JPH03181U - - Google Patents
Info
- Publication number
- JPH03181U JPH03181U JP768389U JP768389U JPH03181U JP H03181 U JPH03181 U JP H03181U JP 768389 U JP768389 U JP 768389U JP 768389 U JP768389 U JP 768389U JP H03181 U JPH03181 U JP H03181U
- Authority
- JP
- Japan
- Prior art keywords
- power supply
- resistor
- thyristor
- series circuit
- photocoupler
- 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 2
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コイル電流の波形図である。
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、４０……ローパスフイル
ター。
FIG. 1 is a circuit diagram showing an embodiment of the present invention, and FIG. 2 is a waveform diagram of a coil current in the same embodiment. 1... Commercial power supply, 2... Full wave rectifier, 3... Thyristor, 4... Coil, 5... Resistor, 8... Operational amplifier, 11, 18... Photocoupler, 24...
Microcomputer, 40...Low pass filter.
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
現われる電圧をローパスフイルターおよびＡＤ変
換器を介してマイクロコンピユータに入力し、該
入力値と設定値とから前記マイクロコンピユータ
が前記サイリスタの制御角の修正値を算出し、該
修正値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 the light emitting diode of the photocoupler, a commercial power supply and an insulated DC power supply are connected to the series circuit of the phototransistor and the resistor of the photocoupler, and the voltage appearing in the series circuit is passed through a low-pass filter and an AD converter. The microcomputer calculates a correction value for the control angle of the thyristor based on the input value and set value, and controls the thyristor via an insulated signal transmission element based on the correction value. A coil current supply circuit for a flow control valve characterized by being triggered.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP768389U JPH03181U (en) | 1989-01-27 | 1989-01-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP768389U JPH03181U (en) | 1989-01-27 | 1989-01-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03181U true JPH03181U (en) | 1991-01-07 |
Family
ID=31511339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP768389U Pending JPH03181U (en) | 1989-01-27 | 1989-01-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03181U (en) |
-
1989
- 1989-01-27 JP JP768389U patent/JPH03181U/ja active Pending
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