FIELD: electrical engineering. SUBSTANCE: phase terminals 2 of controlled and uncontrolled A.C. power supply sources are connected through windings of equalizing transformers 8 and 9 to A.C. user 3. Controlled A.C. power supply source 1 includes controlled source 25 of reference voltage which input is coupled to output of voltage comparator 23 across output of user 3 with nominal voltage. Novelty of system lies in fitting of it with unit composed of two-threshold comparators 44 and 45, sources 48 and 49 of bias voltage and controlled keys 46 and 47 which make it possible to change voltage of controlled source 1 so that with switching on of A.C. sources 1 and 2 for parallel operation deviation of voltage across user 3 does not exceed maximum permissible norm. EFFECT: enhanced efficiency and reliability of system of uninterrupted power supply by expansion of range of parallel operation of controlled and uncontrolled A C power supply sources. 1 dwg
Title | Year | Author | Number |
---|---|---|---|
CONTINUOUS-POWER SUPPLY SYSTEM | 1993 |
|
RU2037936C1 |
FREQUENCY-CONTROLLED ELECTRIC MOTOR DRIVE | 1988 |
|
RU2014722C1 |
UNINTERRUPTED ELECTRIC POWER SUPPLYING SYSTEM | 0 |
|
SU1690078A1 |
THYRATRON MOTOR | 1991 |
|
RU2007010C1 |
SYSTEM OF CONTINUOUS SECURE POWER SUPPLY | 0 |
|
SU1690080A1 |
VOLTAGE CONVERTER | 1991 |
|
RU2015611C1 |
VARIABLE-SPEED ELECTRIC DRIVE | 1989 |
|
RU2069033C1 |
TEMPERATURE CONTROLLER | 1992 |
|
RU2037870C1 |
DEVICE FOR CONTROL OVER POWER TRANSISTOR KEY | 1991 |
|
RU2012982C1 |
M-PHASE INVERTER CONTROL DEVICE | 1990 |
|
RU2013851C1 |
Authors
Dates
1995-09-10—Published
1988-08-09—Filed