GB1531279A - Electric supply system for providing uninterrupted power to a load - Google Patents

Electric supply system for providing uninterrupted power to a load

Info

Publication number
GB1531279A
GB1531279A GB5212275A GB5212275A GB1531279A GB 1531279 A GB1531279 A GB 1531279A GB 5212275 A GB5212275 A GB 5212275A GB 5212275 A GB5212275 A GB 5212275A GB 1531279 A GB1531279 A GB 1531279A
Authority
GB
United Kingdom
Prior art keywords
inverter
circuit
current
output voltage
output
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.)
Expired
Application number
GB5212275A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Co
Original Assignee
General Electric Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from US05/536,287 external-priority patent/US4013938A/en
Priority claimed from US05/536,285 external-priority patent/US3999113A/en
Priority claimed from US05/536,288 external-priority patent/US3988661A/en
Application filed by General Electric Co filed Critical General Electric Co
Publication of GB1531279A publication Critical patent/GB1531279A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
    • H02H7/10—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers
    • H02H7/12—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers
    • H02H7/122—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for converters; for rectifiers for static converters or rectifiers for inverters, i.e. dc/ac converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/337—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration
    • H02M3/3376—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current
    • H02M3/3378—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only in push-pull configuration with automatic control of output voltage or current in a push-pull configuration of the parallel type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
    • H02M7/538—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a push-pull configuration
    • H02M7/53803—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a push-pull configuration with automatic control of output voltage or current
    • H02M7/53806—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a push-pull configuration with automatic control of output voltage or current in a push-pull configuration of the parallel type

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Protection Of Static Devices (AREA)
  • Continuous-Control Power Sources That Use Transistors (AREA)

Abstract

1531279 Power supplies GENERAL ELECTRIC CO 19 Dec 1975 [24 Dec 1974 (5)] 52122/75 Headings H2F and H2H An electric power supply system for providing an uninterrupted supply to a load comprises a plurality of power supplies, such as 10, 12 having their outputs connected in parallel to provide a common output voltage VOP, VON for the load, each of the power supplies comprising an inverter 28 having the input thereto controllable by switching means driven by signals B1, B2 in accordance with a desired output thereof, means being provided to generate a current limiting signal so as to sense when the current input to the inverter reaches a predetermined magnitude and which signal is effective to turn off the inverter 28 by control of the drive signals B1, B2. The system output voltage VOP, VON is developed from an unregulated D.C. input INP, INN, by way of the inverter 28, which includes a transformer T1, and a rectifier filter device 30. The inverter 28 is of the pulse width modulated type when the the primary winding of the transformer T1 centre tapped and connected to the D.C. input by way of a current shunt 31, the current flowing alternately in the two halves of the primary winding by the control of transistors receiving signals B1, B2 from a base driver circuit 72. A "crowbar" type circuit 40 is operative to short circuit the output of the rectifier 30 should the output voltage VOP, VON exceed a predetermined maximum. The output voltage of the inverter 28 is compared with a reference voltage developed in a reference regulator and isolator 56 by a high voltage cut-off and isolator circuit 44, a signal appearing on line 46 to a high voltage shut-off latch circuit 48 whenever the inverter output voltage exceeds the reference voltage. The circuit 56 also provides a feedback signal on a line 60 to a feedback circuit 78, which signal is proportional to the difference between the reference voltage and the output voltage VOP. A circuit 64 monitors high and low values of the output voltage VOP, a light-emitting diode being lit to indicate power is present and the output voltage is within limits and an alarm 99 sounding if the output voltage is high. A pulse generator oscillator 66 produces steering signals LOGA; LOGB signals to the base driver circuit 72 whereby to control the inverter 28, and at the same time produces further signals which are fed to the base driver circuit 72, the feedback circuit 78 and a current limit regulator 76. A fast current limit circuit 36 is operative to sense the current flowing in the primary winding of transformer T1 by means of the current shunt 31 and is effective by way of the base driver circuit to turn off the inverter 28 whenever the current in the shunt exceeds a predetermined value. The circuit 36 also provides signals representing the actual value of, and a reference value for, the inverter output current to the current limit regulator circuit 76 the latter circuit being effective to hold the output current constant at a maximum allowable value when the current reaches this value whilst simultaneously allowing the output voltage to decrease. The high voltage shut off latch circuit 48 turns off the inverter 28 whenever the output voltage VOP exceeds a predetermined level and also senses whether the output is present, from another supply, when the inverter 28 is first turned on. A turn off circuit 91 receives a current representing signal from the first current limit circuit 36 and acts to turn off the inverter 28 in an overcurrent condition. A start-up circuit 93 operates to turn on the inverter 28 whenever the inverter is turned off, the circuits 91, 93 acting in a cyclic-manner to turn off-turn on the inverter 28 until the overcurrent condition has disappeared. The circuits 91, 93 together with the circuit 48 act in a similar manner should the output voltage VOP be in an overvoltage condition. A second inverter 22 of the oscillating saturable core type produces various output voltages which are used to power the various circuits of the system 10. The inverter circuits 22, 28 are illustrated in Figs. 15, 16 respectively (not shown).
GB5212275A 1974-12-24 1975-12-19 Electric supply system for providing uninterrupted power to a load Expired GB1531279A (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US53628674A 1974-12-24 1974-12-24
US53629074A 1974-12-24 1974-12-24
US05/536,287 US4013938A (en) 1974-12-24 1974-12-24 Power supply system for providing uninterrupted output power
US05/536,285 US3999113A (en) 1974-12-24 1974-12-24 Overcurrent detection apparatus for controlling power supplies
US05/536,288 US3988661A (en) 1974-12-24 1974-12-24 Power supply system for generating constant power under maximum current conditions

Publications (1)

Publication Number Publication Date
GB1531279A true GB1531279A (en) 1978-11-08

Family

ID=27541856

Family Applications (1)

Application Number Title Priority Date Filing Date
GB5212275A Expired GB1531279A (en) 1974-12-24 1975-12-19 Electric supply system for providing uninterrupted power to a load

Country Status (5)

Country Link
JP (1) JPS5186925A (en)
DE (1) DE2543490A1 (en)
FR (1) FR2296218A1 (en)
GB (1) GB1531279A (en)
IT (1) IT1051540B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101087101B (en) * 2006-06-09 2013-03-13 台达电子工业股份有限公司 Power supplier reducing the energy consumption of power status display device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3784893A (en) * 1973-01-10 1974-01-08 Bell Telephone Labor Inc High voltage shutdown protection circuit with bias arrangement to decrease the voltage shutdown point with increasing load
US3816809A (en) * 1973-04-30 1974-06-11 Gte Automatic Electric Lab Inc Power supply having improved over-voltage protection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101087101B (en) * 2006-06-09 2013-03-13 台达电子工业股份有限公司 Power supplier reducing the energy consumption of power status display device

Also Published As

Publication number Publication date
JPS5186925A (en) 1976-07-30
IT1051540B (en) 1981-05-20
DE2543490A1 (en) 1976-07-08
FR2296218A1 (en) 1976-07-23

Similar Documents

Publication Publication Date Title
US4035716A (en) Super compensated voltage control of redundant D.C. power supplies
US4005352A (en) Protection circuit for magnetically controlled d-c to d-c converter
US4135233A (en) Voltage control circuit for a DC-to-DC convertor
US3733538A (en) Apparatus for limiting instantaneous inverter current
US3111632A (en) Transistor oscillator
US3387228A (en) Regulated inverter circuit
US3619761A (en) Excitation control device of self-exciting, compound synchronous machine
GB1531313A (en) Inverters
GB1051463A (en)
JPS62100165A (en) Watch-and-wait operation circuit of switching regulator
US3673488A (en) Rotating alternator current generator system
GB1531279A (en) Electric supply system for providing uninterrupted power to a load
US4665475A (en) Current converter
GB1282455A (en) Rectifier controlled apparatus for an a.c. generator excitation system
US3737760A (en) Voltage control apparatus for an alternating current generator
US3417313A (en) Two-core solid state voltage inverter systems
GB938418A (en) Control system for standby motor armature current in an uninterrupted power supply
EP0247407B1 (en) Switching mode power supply
US3105186A (en) Horsepower limit control and function generator therefor
SU1741238A1 (en) Stabilized converter
US4542450A (en) Electrical converter including gain enhancing means for low gain transistors
JPS5717037A (en) Switching regulator
US3792288A (en) A. c. power transmission systems
US3671844A (en) Dc power controller with static switching elements and common current feedback transformer between direct voltage source and load
US3287619A (en) Permanent magnet generator output control

Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee