EP0536877B1 - Timed power saving device - Google Patents

Timed power saving device Download PDF

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Publication number
EP0536877B1
EP0536877B1 EP92307296A EP92307296A EP0536877B1 EP 0536877 B1 EP0536877 B1 EP 0536877B1 EP 92307296 A EP92307296 A EP 92307296A EP 92307296 A EP92307296 A EP 92307296A EP 0536877 B1 EP0536877 B1 EP 0536877B1
Authority
EP
European Patent Office
Prior art keywords
lamps
parallel
lamp
resistive
conductor
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 - Lifetime
Application number
EP92307296A
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German (de)
French (fr)
Other versions
EP0536877A1 (en
Inventor
Horacio Rodrigues Sobrinho
Antonio Rodrigues Neto
Renato Rodrigues
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Individual
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Individual
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Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B39/00—Circuit arrangements or apparatus for operating incandescent light sources
    • H05B39/04—Controlling
    • H05B39/041—Controlling the light-intensity of the source
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling
    • H05B41/38—Controlling the intensity of light
    • H05B41/40—Controlling the intensity of light discontinuously

Definitions

  • the instant invention relates to an electronic device for saving electrical power, to be used in lamps of any kind or for resistive or capacitive loads, by decreasing the electrical current feeding the loads, at pre-determined time periods, by means of timing, sinusoidal wave rectifying and reducing the power.
  • thermostats which decrease light intensity, through partial dissipation of the current in a resistor.
  • dimmers were developed which decrease light intensity of the lamp by decreasing the power supply voltage. Their use is however limited to incandescent lamps, and they are relatively expensive and have no timing features.
  • a first aspect of the invention provides a timed power saver, comprising an electronic timer, connected in parallel with a half-wave rectifying diode and both connected to a phase conductor, the timer and diode being connected in series with a resistive or an inductive load and also in parallel with a second conductor, which is either neutral or of another phase.
  • the timed power saver of the invention was developed in order to overcome the disadvantages of present systems, since the device may be used in any kind of lamp (Mercury vapour, incandescent, fluorescent, sodium vapour, multi-vapour, halogen, etc.), on resistive loads and capacitive loads since timing may be programmed, therefore the time of power decrease may be predetermined; it extends the life of reactances and lamps, may be connected to a lamp or to a group of lamps, has low cost, saves electrical power and is of small size.
  • lamp Mercury vapour, incandescent, fluorescent, sodium vapour, multi-vapour, halogen, etc.
  • the power saver includes at least one further resistor connected in parallel to the timer and the diode.
  • the resistor may be a variable resistor or a plurality of fixed value resistors connected in parallel and individually selectable by one or more switches.
  • Figure 1 is an electrical diagram of a first embodiment of the timing and power saving device for discharge lamps (Mercury vapour, sodium vapour, metallic vapour, etc.) comprising an electronic timer 1, connected in parallel to a half-wave rectifying diode 2 and four fixed value resistors 3 arranged parallel therebetween and selectable by switches 4, all connected to a phase conductor 5, and in series with a resistive load 6, normally a lamp or a group of lamps which is arranged in parallel to a conductor 7, which is of neutral or of another phase.
  • a resistive load 6 normally a lamp or a group of lamps which is arranged in parallel to a conductor 7, which is of neutral or of another phase.
  • Figure 2 is an electrical diagram of a second embodiment of the timing and power saving device at inductive loads, comprising an electronic timer 1, connected in parallel to a half-wave rectifying diode 2 and to a variable resistor 8, all being connected to the phase conductor 5 and in series with an inductive load 9 and with the conductor 7 which is of neutral or of another phase.
  • Operation of the power saving device of the invention is based on the elimination of the half-wave by diode 2 and, through the action of two resistors 3 or a variable resistor 8, the electrical power supply being decreased during the discontinuity of the sinusoidal wave and, consequently, the power of the resistive or inductive load is also decreased.
  • the electrical current will be reduced to variable values, depending on resistors 3 or 8, between 1 and 99% of the normal current.
  • Diodes 2 used may be negative or positive diodes, which should be equally mixed thus avoiding the electrical power supply unbalance.
  • the dimensioning is extrapolated for loads of different powers, such as sodium vapour discharge lamps, metal vapour discharge lamps, etc.
  • the energy loss due to the use of two resistors 3 or 8 is estimated between 5 and 17W in the examples.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Catching Or Destruction (AREA)
  • Radiation-Therapy Devices (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Finger-Pressure Massage (AREA)
  • Circuit Arrangements For Discharge Lamps (AREA)
  • Control Of Voltage And Current In General (AREA)
  • Pyridine Compounds (AREA)
  • Led Device Packages (AREA)
  • Silver Salt Photography Or Processing Solution Therefor (AREA)
  • Cosmetics (AREA)

Abstract

Device for decreasing electrical power consumption in inductive or resistive loads and particularly for decreasing electrical power consumption in public lighting systems. Based on the elimination of the sinusoidal half-wave and on the continuity through the action of a fixed or variable resistor, the saver overcomes the disadvantages of present devices, may be used in any type of lamp or resistive or inductive load, has programmable timing, extends the life of lamps, may be connected to a lamp or to a group of lamps, its cost is low, saves power and its size is small. In one embodiment the invention provides an electrical diagram of a first embodiment of the timing and power saving device for discharge lamps (Hg steam, sodium steam, metallic steam, etc.) comprising an electronic timer 1, connected in parallel to a half-wave rectifying diode 2 and four fixed value resistors 3 arranged parallel therebetween and selectable by switches 4, all connected to a phase conductor 5, and in series with a resistive load 6, normally a lamp or a group of lamps which is arranged in parallel to a conductor 7, which is of neutral or of another phase. <IMAGE>

Description

  • The instant invention relates to an electronic device for saving electrical power, to be used in lamps of any kind or for resistive or capacitive loads, by decreasing the electrical current feeding the loads, at pre-determined time periods, by means of timing, sinusoidal wave rectifying and reducing the power.
  • As already known in the art of electric and electronic arrangements, the decrease in electrical current supplying lamps is effected by means of thermostats, which decrease light intensity, through partial dissipation of the current in a resistor. These devices have several disadvantages: they do not save power, generate heat and have no timing features.
  • Afterwards, dimmers were developed which decrease light intensity of the lamp by decreasing the power supply voltage. Their use is however limited to incandescent lamps, and they are relatively expensive and have no timing features.
  • It is an object of the invention to provide a power saver which overcomes these disadvantages.
  • Accordingly a first aspect of the invention provides a timed power saver, comprising an electronic timer, connected in parallel with a half-wave rectifying diode and both connected to a phase conductor, the timer and diode being connected in series with a resistive or an inductive load and also in parallel with a second conductor, which is either neutral or of another phase.
  • The timed power saver of the invention was developed in order to overcome the disadvantages of present systems, since the device may be used in any kind of lamp (Mercury vapour, incandescent, fluorescent, sodium vapour, multi-vapour, halogen, etc.), on resistive loads and capacitive loads since timing may be programmed, therefore the time of power decrease may be predetermined; it extends the life of reactances and lamps, may be connected to a lamp or to a group of lamps, has low cost, saves electrical power and is of small size.
  • Advantageously the power saver includes at least one further resistor connected in parallel to the timer and the diode. The resistor may be a variable resistor or a plurality of fixed value resistors connected in parallel and individually selectable by one or more switches.
  • The invention will be described further, by way of example, with reference to the accompanying drawings in which:-
    • Fig. 1 is a circuit diagram of a first embodiment; and
    • Fig. 2 is a circuit diagram of a second embodiment.
  • Figure 1 is an electrical diagram of a first embodiment of the timing and power saving device for discharge lamps (Mercury vapour, sodium vapour, metallic vapour, etc.) comprising an electronic timer 1, connected in parallel to a half-wave rectifying diode 2 and four fixed value resistors 3 arranged parallel therebetween and selectable by switches 4, all connected to a phase conductor 5, and in series with a resistive load 6, normally a lamp or a group of lamps which is arranged in parallel to a conductor 7, which is of neutral or of another phase.
  • Figure 2 is an electrical diagram of a second embodiment of the timing and power saving device at inductive loads, comprising an electronic timer 1, connected in parallel to a half-wave rectifying diode 2 and to a variable resistor 8, all being connected to the phase conductor 5 and in series with an inductive load 9 and with the conductor 7 which is of neutral or of another phase.
  • Operation of the power saving device of the invention is based on the elimination of the half-wave by diode 2 and, through the action of two resistors 3 or a variable resistor 8, the electrical power supply being decreased during the discontinuity of the sinusoidal wave and, consequently, the power of the resistive or inductive load is also decreased.
  • Therefore, during 50% of the time period, the electrical current will be reduced to variable values, depending on resistors 3 or 8, between 1 and 99% of the normal current.
  • When the timer 1 is disconnected, the electrical current passes through said diode 2 and through resistors 4 or 8, actuating the saving system.
  • When timer 1 is connected, the current bypasses diode 2 and the two resistors 3 or 8 and normally supplies directly the load 6 or 9.
  • Diodes 2 used may be negative or positive diodes, which should be equally mixed thus avoiding the electrical power supply unbalance.
  • In the case of incandescent or mixed lamps, there is no need of compensating the rectified half-wave and, consequently, resistor 3 or 8 is not required, the remaining parts of the configuration being maintained.
  • Upon practical tests, and comparing the developments with and without saver, the results included in Table (A) are obtained.
  • On the basis of the relationships indicated in said table, the dimensioning is extrapolated for loads of different powers, such as sodium vapour discharge lamps, metal vapour discharge lamps, etc.
  • The energy loss due to the use of two resistors 3 or 8 is estimated between 5 and 17W in the examples.
  • The power saving obtained with the device of the instant invention is variable as a function of the timer programming, taking as an example a public lighting system with a lighting level X and operating during 10 hours a day, where consumption will be equivalent to 10 h.X/day. If the saver is programmed for acting after 5 hours from lit, limiting the load 50%, the saving will be 5 h.X + 5 h.1/2 X = 7 1/2 h.X, i.e. a power saving of 25%. TABLE (A)
    Type of lamp Power of lamp (W) DDP (V) Resistor 3 (ohms) Power dissipated by resistor (W) Current WITHOUT Saving device (A) Current WITH Saving device (A) Savings %
    Hg vapour 125 35 165,00 7,43 1,250 0,625 50
    Hg vapour 250 35 110,00 11,14 2,500 1,250 50
    Hg vapour 400 35 73,15 16,75 5,000 2,500 50
    Incandescent 75 110 - - 0,259 0,125 50
    Mixed 160 110 - - 1,000 0,500 50
    Mixed 250 110 - - 2,250 1,125 50

Claims (5)

  1. A timed power saver, comprising an electronic timer (1), connected in parallel with a half-wave rectifying diode (2) and both connected to a phase conductor (5), the timer (1) and diode (2) being connected in series with a resistive or an inductive load (6, 9) and also in parallel with a second conductor (7), which is either neutral or of another phase.
  2. A power saver as claimed in claim 1 wherein the timer (1) and diode (2) are both further connected in parallel to at least one resistor (3, 8).
  3. A power saver as claimed in claim 2, wherein the resistor is a variable resistor (8).
  4. A power saver as claimed in claim 2, wherein the resistors are four fixed value resistors (3) which are individually selectable by switches (4).
  5. A timed power saver as claimed in claim 1, using a resistor or a variable resistor of an incandescent or mixed lamps.
EP92307296A 1991-08-09 1992-08-10 Timed power saving device Expired - Lifetime EP0536877B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BR9103451 1991-08-09
BR919103451A BR9103451A (en) 1991-08-09 1991-08-09 TIMED ENERGY SAVER

Publications (2)

Publication Number Publication Date
EP0536877A1 EP0536877A1 (en) 1993-04-14
EP0536877B1 true EP0536877B1 (en) 1997-01-15

Family

ID=4052544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92307296A Expired - Lifetime EP0536877B1 (en) 1991-08-09 1992-08-10 Timed power saving device

Country Status (12)

Country Link
EP (1) EP0536877B1 (en)
JP (1) JPH0546260A (en)
CN (1) CN1072556A (en)
AT (1) ATE147924T1 (en)
AU (1) AU2078392A (en)
BR (1) BR9103451A (en)
CA (1) CA2072825A1 (en)
DE (1) DE69216750T2 (en)
DK (1) DK0536877T3 (en)
ES (1) ES2100295T3 (en)
GR (1) GR3023136T3 (en)
PT (1) PT100080A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7982404B2 (en) 2006-12-22 2011-07-19 Musco Corporation Method and apparatus and system for adjusting power to HID lamp to control level of light output and conserve energy (ballast multi-tap power output)
US8247990B1 (en) 2008-12-05 2012-08-21 Musco Corporation Apparatus, method, and system for improved switching methods for power adjustments in light sources

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6681110B1 (en) 1999-07-02 2004-01-20 Musco Corporation Means and apparatus for control of remote electrical devices
US7956551B1 (en) 2004-02-24 2011-06-07 Musco Corporation Apparatus and method for discretionary adjustment of lumen output of light sources having lamp lumen depreciation characteristic compensation
US7843144B2 (en) 2004-02-24 2010-11-30 Musco Corporation Method and apparatus for retrofitting HID lamps with system to periodically adjust operating wattage
US8770796B2 (en) 2004-02-24 2014-07-08 Musco Corporation Energy efficient high intensity lighting fixture and method and system for efficient, effective, and energy saving high intensity lighting
US7956556B1 (en) 2004-02-24 2011-06-07 Musco Corporation Apparatus and method for compensating for reduced light output of a solid-state light source having a lumen depreciation characteristic over its operational life
US7176635B2 (en) 2004-02-24 2007-02-13 Musco Corporation Apparatus and method for compensating for reduced light output of a light source having a lumen depreciation characteristic over its operational life
US8288965B1 (en) 2007-02-23 2012-10-16 Musco Corporation Apparatus and method for switching in added capacitance into high-intensity discharge lamp circuit at preset times
WO2009060250A1 (en) * 2007-11-07 2009-05-14 Mariano Penagos Consuegra System and device for controlling the turning on, turning off and consumption of power in lights
CN101949887A (en) * 2010-08-20 2011-01-19 郑州炜盛电子科技有限公司 Semiconductor gas sensor and various gas detection method thereof

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6097599A (en) * 1983-11-02 1985-05-31 アレツクス工業株式会社 Device for dimming discharge lamp
DE3438003A1 (en) * 1984-10-17 1986-04-17 Philips Patentverwaltung Gmbh, 2000 Hamburg Circuit arrangement for the AC operation of gas-discharge lamps

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7982404B2 (en) 2006-12-22 2011-07-19 Musco Corporation Method and apparatus and system for adjusting power to HID lamp to control level of light output and conserve energy (ballast multi-tap power output)
US8247990B1 (en) 2008-12-05 2012-08-21 Musco Corporation Apparatus, method, and system for improved switching methods for power adjustments in light sources

Also Published As

Publication number Publication date
PT100080A (en) 1994-05-31
DE69216750T2 (en) 1997-06-19
JPH0546260A (en) 1993-02-26
BR9103451A (en) 1993-03-09
DE69216750D1 (en) 1997-02-27
CN1072556A (en) 1993-05-26
EP0536877A1 (en) 1993-04-14
ES2100295T3 (en) 1997-06-16
GR3023136T3 (en) 1997-07-30
AU2078392A (en) 1993-02-11
CA2072825A1 (en) 1993-02-10
DK0536877T3 (en) 1997-07-14
ATE147924T1 (en) 1997-02-15

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