IT1054290B - Excess current detection circuit - uses nonlinear magnetic coupling via saturated core with hysteresis - Google Patents
Excess current detection circuit - uses nonlinear magnetic coupling via saturated core with hysteresisInfo
- Publication number
- IT1054290B IT1054290B IT1944576A IT1944576A IT1054290B IT 1054290 B IT1054290 B IT 1054290B IT 1944576 A IT1944576 A IT 1944576A IT 1944576 A IT1944576 A IT 1944576A IT 1054290 B IT1054290 B IT 1054290B
- Authority
- IT
- Italy
- Prior art keywords
- hysteresis
- core
- load
- current
- nonlinear magnetic
- Prior art date
Links
Landscapes
- Motor And Converter Starters (AREA)
- Electric Vacuum Cleaner (AREA)
- Joints Allowing Movement (AREA)
Abstract
A circuit for detecting excess load a.c. and various developed forms of it for motor starting circuits and the like, using the nonlinear magnetic characteristic of a core with hysteresis, is presented. The basic circuit consists of a current transformer with a primary winding (5) through which the alternating load current (9) flows, a secondary winding (6) through which a direct bias current (IB) flows, and a core (3) with a square loop hysteresis characteristic. The bias current in the secondary has such a magnitude that the core provides no effective coupling between the windings unless the load alternating current exceeds the required threshold. In this case pulses are produced in the secondary winding coincident with teh peak values of the load currents.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP971675U JPS5190648U (en) | 1975-01-20 | 1975-01-20 |
Publications (1)
Publication Number | Publication Date |
---|---|
IT1054290B true IT1054290B (en) | 1981-11-10 |
Family
ID=28079867
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
IT1944576A IT1054290B (en) | 1975-01-20 | 1976-01-21 | Excess current detection circuit - uses nonlinear magnetic coupling via saturated core with hysteresis |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS5190648U (en) |
IT (1) | IT1054290B (en) |
-
1975
- 1975-01-20 JP JP971675U patent/JPS5190648U/ja active Pending
-
1976
- 1976-01-21 IT IT1944576A patent/IT1054290B/en active
Also Published As
Publication number | Publication date |
---|---|
JPS5190648U (en) | 1976-07-20 |
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