GB1279477A - Alternating current power supply circuit - Google Patents
Alternating current power supply circuitInfo
- Publication number
- GB1279477A GB1279477A GB59768/69A GB5976869A GB1279477A GB 1279477 A GB1279477 A GB 1279477A GB 59768/69 A GB59768/69 A GB 59768/69A GB 5976869 A GB5976869 A GB 5976869A GB 1279477 A GB1279477 A GB 1279477A
- Authority
- GB
- United Kingdom
- Prior art keywords
- voltage
- capacitor
- lamp
- signal
- supply
- 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
Links
- 239000003990 capacitor Substances 0.000 abstract 10
- 238000010304 firing Methods 0.000 abstract 4
- 230000010354 integration Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000004065 semiconductor Substances 0.000 abstract 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
- G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices
- G05F1/44—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only
- G05F1/445—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only being transistors in series with the load
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
- G03G15/00—Apparatus for electrographic processes using a charge pattern
- G03G15/20—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat
- G03G15/2003—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat
- G03G15/2007—Apparatus for electrographic processes using a charge pattern for fixing, e.g. by using heat using heat using radiant heat, e.g. infrared lamps, microwave heaters
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
- G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices
- G05F1/44—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only
- G05F1/45—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only being controlled rectifiers in series with the load
- G05F1/455—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only being controlled rectifiers in series with the load with phase control
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Electromagnetism (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Fixing For Electrophotography (AREA)
- Control Or Security For Electrophotography (AREA)
- Dc-Dc Converters (AREA)
- Control Of Temperature (AREA)
Abstract
1279477 Automatic voltage control INTERNATIONAL BUSINESS MACHINES CORP 8 Dec 1969 [30 Dec 1968] 59768/69 Heading G3R The R.M.S. voltage across a lamp 38 is maintained at a desired value by variation of the firing angle of a controlled semi-conductor switch 48 whose trigger signals are provided by a regulating circuit 45, which is arranged to supply an increased level of power to the lamp for a predetermined time period following energization and which includes means to automatically compensate the reference signal to maintain R.M.S. voltage regulation at large firing angles. As shown in Fig.3, a signal on line 54 representative of the voltage across the lamp is applied to a rectifying network T1, T2, T3, R3, R4, D9 which produces a D.C. signal I F for combination with reference signals I 1 and I R . The latter is a steady state signal indicative of the desired value of lamp voltage and provided by a circuit comprising members Z1, D3, T10, R9, R28 supplied via transformer/rectifier 40, D7, D8 from the A. C. supply 42 for the lamp. The signal I 1 is provided by a circuit comprising members C1, T9, R7, R8 arranged so that when the lamp is initially energized the capacitor C1 is discharged to allow conduction of transistor T9 and production of the signal I 1 which is progressively reduced to zero by charging of the capacitor C1. Thus the voltage applied to the lamp is progressively reduced from a high initial value to the steady state value in a time period which is determined by the capacitor charging time constant and which is chosen to match the increase in thermal energy stored in apparatus heated by the lamp, this apparatus forming part of a conventional xerographic copying machine, Fig. 1 (not shown). In order to limit or suppress the signal I 1 when the lamp is energized soon after the previous period of energization, the capacitor discharge time constant (through resistors R8, R12) is chosen to match the heat loss characteristic of the apparatus, so that the value of I 1 depends on the time interval between successive energizations. The signals I 1 , I R , I F are added at the summing point 56 for integration by a capacitor C2 whose voltage is compared with that of the Zener diode Z1 in a differential amplifier T11, T12, the arrangement being such that the voltage across a capacitor C4 is a linearly increasing ramp whose slope varies in accordance with the voltage on the capacitor C2. Capacitor C4 is automatically discharged in synchronism with each half cycle of the supply 42 by a circuit including transistors T4, T5 and diodes D5, D6, D10, -- D12 supplied via lines 46, 47 from the transformer 40. The ramp voltage from capacitor C4 is applied to a Schmitt trigger T7, T8 which produces firing signals for the switch 48 via the transistor T13 and pulse transformer 59. Variation of the signal I F and/or I 1 thus varies the voltage of C2, the slope of the ramp voltage and hence the firing angle of the switch 48. A resistor R6 reduces the signal I R at a linear rate with increasing supply voltage, to compensate for the increasing ratio of R.M.S. voltage to average voltage (represented by the voltage across the capacitor C2) under these conditions.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US78794668A | 1968-12-30 | 1968-12-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1279477A true GB1279477A (en) | 1972-06-28 |
Family
ID=25142986
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB59768/69A Expired GB1279477A (en) | 1968-12-30 | 1969-12-08 | Alternating current power supply circuit |
Country Status (13)
Country | Link |
---|---|
US (1) | US3532855A (en) |
JP (1) | JPS5341535B1 (en) |
AR (1) | AR195259A1 (en) |
AT (1) | AT303523B (en) |
BE (1) | BE743842A (en) |
CH (1) | CH494988A (en) |
DE (1) | DE1963255C3 (en) |
ES (1) | ES375000A1 (en) |
FR (1) | FR2027302A1 (en) |
GB (1) | GB1279477A (en) |
NL (1) | NL169525C (en) |
SE (1) | SE344833B (en) |
ZA (1) | ZA698529B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2151377A (en) * | 1983-12-14 | 1985-07-17 | Gen Electric | Load voltage control switching circuits |
Families Citing this family (28)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3731183A (en) * | 1971-09-29 | 1973-05-01 | Inductotherm Corp | Power control and phase angle correcting apparatus |
US3743779A (en) * | 1972-01-27 | 1973-07-03 | Xerox Corp | Selective fusing |
US3783235A (en) * | 1972-10-31 | 1974-01-01 | Sperry Rand Corp | Fuser low voltage sensor for photocopy machine |
US3881085A (en) * | 1972-12-06 | 1975-04-29 | Xerox Corp | Fuser control circuit for copying apparatus |
CA1018585A (en) * | 1972-12-06 | 1977-10-04 | Robert L. Traister | Fuser control circuit for copying apparatus |
US3781516A (en) * | 1973-02-20 | 1973-12-25 | Xerox Corp | Fuser control system |
US4068157A (en) * | 1974-11-29 | 1978-01-10 | Sola Basic Industries, Inc. | Regulated multiple transformer system |
US4004214A (en) * | 1975-03-28 | 1977-01-18 | Viva-Tech, Inc. | Phase-controlled voltage regulator |
NL7509461A (en) * | 1975-08-08 | 1977-02-10 | Oce Van Der Grinten Nv | CONTROL CIRCUIT FOR A POWER CONTROL CIRCUIT AND ELECTRICAL (PHOTO) GRAPHICS COPIER FITTED WITH THIS CONTROL CIRCUIT. |
US4037148A (en) * | 1975-08-15 | 1977-07-19 | General Electric Company | Ballast control device |
US4032746A (en) * | 1975-11-10 | 1977-06-28 | Xerox Corporation | Control system for a fusing apparatus |
US4093908A (en) * | 1976-09-13 | 1978-06-06 | Viva-Tech Inc. | Phase-controlled voltage regulator |
JPS5339136A (en) * | 1976-09-22 | 1978-04-10 | Ricoh Co Ltd | Fixing temperature controlling method |
JPS5339756A (en) * | 1976-09-24 | 1978-04-11 | Ricoh Co Ltd | Input control for heat-fixing system |
US4122382A (en) * | 1977-04-20 | 1978-10-24 | Combustion Engineering, Inc. | Load-responsive treater controller |
DE2724052C2 (en) * | 1977-05-27 | 1979-07-12 | Hoechst Ag, 6000 Frankfurt | Device for fusing toner on a carrier |
US4168476A (en) * | 1977-07-11 | 1979-09-18 | Rca Corporation | AC voltage regulator |
US4308494A (en) * | 1977-10-31 | 1981-12-29 | General Electric Co. | Thyristor power controller for an electrostatic precipitator |
US4377739A (en) * | 1978-01-16 | 1983-03-22 | Pitney Bowes Inc. | Average power control apparatus and method |
US4223207A (en) * | 1978-02-24 | 1980-09-16 | E. I. Du Pont De Nemours And Company | Apparatus for controlling the power supplied to a load |
EP0006553A1 (en) * | 1978-07-03 | 1980-01-09 | International Business Machines Corporation | Method and apparatus for operating a heat source in a reproduction machine |
US4469026A (en) * | 1979-09-20 | 1984-09-04 | Ibm Corporation | Method and apparatus for controlling drying and detaching of printed material |
US4318612A (en) * | 1980-07-10 | 1982-03-09 | International Business Machines Corporation | Hot roll fuser temperature control |
US4372675A (en) * | 1980-11-28 | 1983-02-08 | Xerox Corporation | Variable power fuser control |
JPS61179439A (en) * | 1985-01-07 | 1986-08-12 | Fuji Photo Film Co Ltd | Heat developing device |
US4772915A (en) * | 1986-04-18 | 1988-09-20 | Alps Electric Co., Ltd. | Electrophotographic printer having compact image development arrangement |
JPS63307186A (en) * | 1987-06-05 | 1988-12-14 | Shin Etsu Handotai Co Ltd | Crystal diameter controller in crystallization |
JP3332407B2 (en) * | 1992-02-28 | 2002-10-07 | キヤノン株式会社 | Image forming device |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3053962A (en) * | 1960-08-01 | 1962-09-11 | Xerox Corp | Xerographic fusing apparatus |
US3375428A (en) * | 1964-02-04 | 1968-03-26 | Lorain Prod Corp | Regulated rectifier circuit |
US3398259A (en) * | 1964-08-12 | 1968-08-20 | Addressograph Multigraph | Photoelectrostatic copying machine |
US3440517A (en) * | 1966-06-17 | 1969-04-22 | Beckman Instruments Inc | Circuit employing silicon controlled rectifiers for regulating the rms value of an a.c. signal across a load |
-
1968
- 1968-12-30 US US787946A patent/US3532855A/en not_active Expired - Lifetime
-
1969
- 1969-11-17 FR FR6940272A patent/FR2027302A1/fr not_active Withdrawn
- 1969-12-08 GB GB59768/69A patent/GB1279477A/en not_active Expired
- 1969-12-08 ZA ZA698529A patent/ZA698529B/en unknown
- 1969-12-10 CH CH1837369A patent/CH494988A/en not_active IP Right Cessation
- 1969-12-17 DE DE1963255A patent/DE1963255C3/en not_active Expired
- 1969-12-18 AT AT1179869A patent/AT303523B/en not_active IP Right Cessation
- 1969-12-23 NL NLAANVRAGE6919247,A patent/NL169525C/en not_active IP Right Cessation
- 1969-12-29 SE SE17953/69A patent/SE344833B/xx unknown
- 1969-12-29 ES ES375000A patent/ES375000A1/en not_active Expired
- 1969-12-30 AR AR226197A patent/AR195259A1/en active
- 1969-12-30 BE BE743842D patent/BE743842A/xx unknown
-
1970
- 1970-02-17 JP JP1318570A patent/JPS5341535B1/ja active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2151377A (en) * | 1983-12-14 | 1985-07-17 | Gen Electric | Load voltage control switching circuits |
Also Published As
Publication number | Publication date |
---|---|
AR195259A1 (en) | 1973-09-28 |
ES375000A1 (en) | 1972-03-16 |
AT303523B (en) | 1972-11-27 |
DE1963255C3 (en) | 1975-07-10 |
NL169525C (en) | 1982-07-16 |
US3532855A (en) | 1970-10-06 |
JPS5341535B1 (en) | 1978-11-04 |
DE1963255B2 (en) | 1974-11-28 |
FR2027302A1 (en) | 1970-09-25 |
NL6919247A (en) | 1970-07-02 |
DE1963255A1 (en) | 1970-07-09 |
SE344833B (en) | 1972-05-02 |
NL169525B (en) | 1982-02-16 |
BE743842A (en) | 1970-05-28 |
CH494988A (en) | 1970-08-15 |
ZA698529B (en) | 1971-07-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
GB1279477A (en) | Alternating current power supply circuit | |
US3633094A (en) | Burst length proportioning controller | |
GB1421578A (en) | Induction heat cooking apparatus | |
GB1116809A (en) | Non-contact ignition device | |
US3506852A (en) | Method and apparatus to provide zero angle firing of a static latching switch in a noise-free electric controller | |
GB1395786A (en) | Low voltage dc supply circuit for a television receiver | |
SE300126B (en) | ||
GB1278991A (en) | Pulsed power supply for electric arc welding | |
GB1261785A (en) | Improvements in or relating to arc welding apparatus | |
GB1343251A (en) | Dc voltage regulator circuit | |
US3231757A (en) | Discontinuous regulator of constant switching frequency | |
US3340460A (en) | Proportional power control systems | |
GB1225475A (en) | ||
GB1274283A (en) | Control apparatus for electrical motors and the like | |
GB1349870A (en) | Regulated electrical power supply | |
GB1391822A (en) | Voltage regulators | |
GB1046728A (en) | Power supply circuits | |
GB1174650A (en) | Circuit Apparatus | |
GB1192881A (en) | Burner Control Apparatus | |
US3391332A (en) | Silicon controlled rectifier circuits and power supplies | |
US3201624A (en) | Transistorized regulator | |
GB1136693A (en) | Voltage regulating circuit | |
GB1013803A (en) | Pulse type regulating system for generators | |
US3463933A (en) | Solid state motor speed control | |
US3767940A (en) | Voltage compensated firing circuit |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |