JPS579292A - Induction load driving circuit - Google Patents
Induction load driving circuitInfo
- Publication number
- JPS579292A JPS579292A JP8214980A JP8214980A JPS579292A JP S579292 A JPS579292 A JP S579292A JP 8214980 A JP8214980 A JP 8214980A JP 8214980 A JP8214980 A JP 8214980A JP S579292 A JPS579292 A JP S579292A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- loads
- cop1
- comparator
- vsl
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P8/00—Arrangements for controlling dynamo-electric motors rotating step by step
- H02P8/12—Control or stabilisation of current
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Stepping Motors (AREA)
Abstract
PURPOSE:To obtain accurate constant current characteristics and to enable stable operation by eliminating the actual load current itself through a filter circuit by comparing it with a reference voltage. CONSTITUTION:There are provided a resistor Rf which generates a voltage Vs proportional to the current flowing through loads L1, L2, means (voltage comparator COP2, resistors R1-R3) for varying the voltage Vs to the feedback voltage Vf relative to the degree of the electromagnetic coupling between the loads L1 and L2, and means (TR1, TR2) for switching a load current in accordance with the compared result by the COP1 between the voltage Vf and the reference voltage Vi in a circuit for driving under constant current the loads L1, L2 electromagnetically coupled with one another by switching means TR1, TR2. Then, AVsu>Vsl, where a is the constant determined by the degree of the electromagetic coupling between the loads of 1>a>0, is satisfied between the maximum value Vsu and the minimum value Vsl of the voltage Vs. Accordingly, since the comparator COP1 alters from ON to OFF after it reaches the level of the comparator COP1, it can accurately control under constant voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8214980A JPS5833799B2 (en) | 1980-06-19 | 1980-06-19 | Inductive load drive circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8214980A JPS5833799B2 (en) | 1980-06-19 | 1980-06-19 | Inductive load drive circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS579292A true JPS579292A (en) | 1982-01-18 |
| JPS5833799B2 JPS5833799B2 (en) | 1983-07-22 |
Family
ID=13766374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8214980A Expired JPS5833799B2 (en) | 1980-06-19 | 1980-06-19 | Inductive load drive circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5833799B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58130798A (en) * | 1982-01-27 | 1983-08-04 | Nec Corp | Drive circuit for step motor |
| US4561120A (en) * | 1983-03-04 | 1985-12-24 | Tokyo Shibaura Denki Kabushiki Kaisha | Protective relaying system |
| JPS6188500U (en) * | 1984-11-15 | 1986-06-09 |
-
1980
- 1980-06-19 JP JP8214980A patent/JPS5833799B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58130798A (en) * | 1982-01-27 | 1983-08-04 | Nec Corp | Drive circuit for step motor |
| US4561120A (en) * | 1983-03-04 | 1985-12-24 | Tokyo Shibaura Denki Kabushiki Kaisha | Protective relaying system |
| JPS6188500U (en) * | 1984-11-15 | 1986-06-09 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5833799B2 (en) | 1983-07-22 |
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