FIELD: electric engineering.
SUBSTANCE: switching device contains load (1), triac (2), control circuit, consisting of pulse shaper (6), electronic switch (9), threshold device (15) and time delay array (12). Load (1) is connected with triac power circuit (2), pulse shaper (6) output (7) is connected with triac control electrode (5); pulse shaper input (8) is linked with Q output of electronic switch (9); electronic switch input (11) is connected with threshold device (15) output (18) via time delay device (12). Threshold device is provided with negative voltage-sensitive input (16) and connected with triac (2) control electrode (5) by this input. Device ensures load protection from current overloading, electric motor from accidents with jamming. Analogue comparator, optical coupler or "п-р-п" transistor connected with common base against circuit may used as threshold device.
EFFECT: improvement of reliability, simplification, improvement of weight and dimension.
3 cl, 9 dwg
| Title | Year | Author | Number |
|---|---|---|---|
| DEVICE FOR FIRING AND POWER CONTROL OF HEATER-CATHODE LUMINESCENT LAMP (VERSIONS) | 2007 |
|
RU2346417C2 |
| CONTROL UNIT OF TEMPERATURE CONTROLLER | 1994 |
|
RU2115155C1 |
| SWITCHING DEVICE FOR PHASED POWER REGULATION | 1997 |
|
RU2124805C1 |
| DEVICE FOR CONTROLLING POSITION OF FIXED V-PLOUGHS | 0 |
|
SU1813686A1 |
| DEVICE FOR CONTROL OF DC MOTOR | 0 |
|
SU864474A1 |
| D.C.VOLTAGE CONVERTER | 0 |
|
SU1169108A1 |
| LIGHTING DEVICE FOR ENDOSCOPIC EQUIPMENT | 2000 |
|
RU2161901C1 |
| DC VOLTAGE LEVEL SELECTOR | 0 |
|
SU943683A1 |
| SEMICONDUCTOR DEVICE WITH SYMMETRICAL VOLTAGE-CURRENT CHARACTERISTIC | 1993 |
|
RU2064716C1 |
| DEVICE FOR CONTROLLING AIR-SUCTION VACUUM CLEANER WITH ELECTRIC MOTOR | 0 |
|
SU1734183A1 |
