WO2003019991A1 - Dispositif d'eclairage pour lampe a decharge - Google Patents

Dispositif d'eclairage pour lampe a decharge Download PDF

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Publication number
WO2003019991A1
WO2003019991A1 PCT/JP2001/007247 JP0107247W WO03019991A1 WO 2003019991 A1 WO2003019991 A1 WO 2003019991A1 JP 0107247 W JP0107247 W JP 0107247W WO 03019991 A1 WO03019991 A1 WO 03019991A1
Authority
WO
WIPO (PCT)
Prior art keywords
discharge lamp
power supply
voltage
circuit
lighting device
Prior art date
Application number
PCT/JP2001/007247
Other languages
English (en)
Japanese (ja)
Inventor
Osamu Takahashi
Yoshitaka Igarashi
Shinsuke Funayama
Naoki Wada
Original Assignee
Mitsubishi Denki Kabushiki Kaisha
Mitsubishi Electric Lighting Corporation
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
Application filed by Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Electric Lighting Corporation filed Critical Mitsubishi Denki Kabushiki Kaisha
Priority to JP2002565146A priority Critical patent/JP5147155B2/ja
Priority to PCT/JP2001/007247 priority patent/WO2003019991A1/fr
Publication of WO2003019991A1 publication Critical patent/WO2003019991A1/fr

Links

Classifications

    • 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
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • H05B41/2825—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a bridge converter in the final stage

Definitions

  • the present invention relates to a discharge lamp lighting device for lighting a discharge lamp with high frequency power from an inverter circuit.
  • FIG. 5 shows a circuit diagram of a conventional discharge lamp device.
  • 1 is a DC power supply obtained from a commercial power supply
  • 2 and 3 are switching elements composed of MOSFETs constituting an inverter circuit
  • 4 is a choke coil for limiting the current of the discharge lamp
  • 2 It has windings ab and cd.
  • 5 is a discharge lamp
  • 6 is a capacitor connected in parallel to the discharge lamp
  • 7 is a coupling capacitor
  • 10 and 11 are a starting circuit of MOSFET 2 consisting of a resistor and a capacitor
  • two sub windings of choke coil 4 are It is connected to its gate via resistors 8 and 9 so that MOSFETs 2 and 3 alternately turn on and off.
  • Fig. 6 shows a configuration example of DC power supply 1 when DC power is obtained from a commercial power supply.
  • la is a commercial power supply
  • 1 b is a diode bridge
  • lc is a constant voltage circuit composed of, for example, a boost converter, and the like. Is output to the load circuit.
  • the operation of the conventional discharge lamp shown in FIG. 5 will be described.
  • FIG. 7 shows a circuit diagram of another conventional discharge lamp device.
  • VCO voltage control oscillator
  • the conventional discharge lamp devices shown in FIGS. 5 and 7 have a problem that excessive power is consumed in the discharge lamp 5 at the end of the life of the discharge lamp 5.
  • the present invention has been made in order to solve the above-mentioned problems of the conventional device, and a first object of the present invention is to provide an ambient operating temperature of a discharge lamp, aging, manufacturing lot variation, a choke coil, and a capacitor. An object of the present invention is to provide a discharge lamp lighting device in which output power is not affected by variations in circuit components such as the above.
  • a second object of the present invention is to provide an inexpensive and simple configuration that does not require an expensive and complicated control circuit such as a VCO, and that the output power is not affected by variations in circuit components such as choke coils and capacitors. It is an object to provide a discharge lamp lighting device. Further, a third object of the present invention is to suppress excessive power consumption of the discharge lamp at the end of the life of the discharge lamp and to reduce the circuit components such as choke coils and capacitors with a cheap and simple configuration. The purpose is to provide a discharge lamp lighting device whose output power is not affected.
  • a discharge lamp lighting device includes: a DC power supply; an inverter circuit for converting DC supplied from the DC power supply to a high-frequency current; a choke coil connected to the inverter circuit; a discharge lamp; A discharge lamp load circuit comprising a coupling capacitor; and a discharge lamp lighting device provided on an input side of the discharge lamp load circuit and driving a switching element of the above-mentioned inverter circuit by a sub winding provided in the above-mentioned inverter circuit.
  • a voltage detecting means provided in a path of the switching element and detecting a voltage corresponding to a circuit current of the DC power supply current; and a voltage detected by the voltage detecting means being the same as a predetermined reference voltage.
  • a control circuit for controlling the driving of the switching element so that This makes it possible to prevent the output power from being affected by the operating temperature around the discharge lamp, aging, the variation in manufacturing lots, and the variation in circuit components such as choke coils and capacitors with a cheap and simple configuration. it can.
  • the voltage detecting means is connected between the switching element on the low potential side of the DC power supply and the negative electrode of the DC power supply. As a result, voltage detection can be easily performed.
  • the voltage detecting means is connected between the switching element on the high potential side of the DC power supply and the positive electrode of the DC power supply. As a result, voltage detection can be easily performed.
  • connection point between the discharge lamp and the coupling capacitor is connected via a diode to the low potential side and the high potential side of the DC power supply, respectively.
  • FIG. 1 is a circuit diagram showing a configuration of Embodiment 1 of the present invention
  • FIG. 2 is a circuit diagram showing a configuration of Embodiment 2 of the present invention
  • FIG. FIG. 4 is a circuit diagram showing a configuration of a fourth embodiment of the present invention
  • FIG. 5 is a circuit diagram showing a configuration of a conventional discharge lamp lighting device
  • FIG. 6 is a circuit diagram showing a configuration of a DC power supply of the conventional discharge lamp lighting device
  • FIG. 7 is a circuit diagram showing another configuration of the conventional discharge lamp lighting device.
  • FIG. 1 is a circuit diagram showing a configuration of a discharge lamp lighting device according to Embodiment 1 of the present invention.
  • 1 is a DC power supply obtained from a commercial power supply
  • 2 and 3 are switching elements composed of MOS FETs constituting an inverter circuit
  • 4 is a choke coil for limiting the current of the discharge lamp, It has two sub windings ab and cd.
  • 5 is a discharge lamp
  • 6 is a capacitor connected in parallel to the discharge lamp
  • 7 is a coupling capacitor
  • the choke coil 4 discharge lamp 5, capacitor 6 and coupling capacitor 7 constitute a discharge lamp load circuit.
  • Reference numerals 10 and 11 denote a starting circuit of the MOS FET 2 composed of a resistor and a capacitor, and two sub-windings ⁇ b and cd of the yoke coil 4 are respectively connected to the MOS FETs 2 and 3 via the resistors 8 and 9. Connect to its gate so that it turns ON and OFF alternately.
  • the terminals a b and cd of the sub winding are connected to the MOS FET 2 and the MOS FET 3 with the polarity shown.
  • reference numeral 20 denotes a voltage detecting resistor which is a voltage detecting means connected between the MOS FET 3 which is a switching element on the low potential side of the DC power supply 1 and the negative electrode of the DC power supply 1, and 45 denotes a control circuit.
  • Operational amplifiers (hereinafter referred to as OP amplifiers) connected in series between resistors 23 and 24, the non-inverting terminal is connected to the node between resistor 21 and capacitor 22, and the inverting terminal is connected to the node between resistors 23 and 24 ),
  • a feedback resistor 26 connected between the inverting input terminal and the output terminal of the OP amplifier 25, resistors 27 and 28 connected in series between the driving power supply VC and the negative electrode of the DC power supply 1, and a non-inverting terminal.
  • a force source having a node connected to the gate gate of T3 is composed of a diode 31 connected to the output of an OP amplifier 32 via a resistor 30.
  • the MOS FETs 2 and 3 are alternately driven at a high frequency by the starting current from the resistor 10 and the capacitor 11 and the discharge lamp 5 is turned on. If the current flowing in the control circuit 45 is sufficiently small and negligible compared to the current flowing in the load circuit of the discharge lamp, the current flowing out of the DC power supply 1 will be M 0 SFET 3 or coupled. It can be said that all the current flows via the voltage detection resistor 20 via the path of the capacitor 7.
  • the circuit current flowing out of the DC power supply 1 is supplied to the capacitor 22.
  • the voltage corresponding to the average value can be obtained.
  • V 22 Voltage of capacitor 22
  • a 1 Average value of outflow current from DC power supply 1
  • K 1 Proportional constant determined by the resistance value of the voltage detection resistor 20
  • Equation (3) is derived from equation (1).
  • a 1 V2 2 / K 1... (3)
  • the output power W1 of the DC power supply 1 can be detected as a value proportional to the voltage across the capacitor 22 by determining the value of K1, that is, the value of the voltage detection resistor 20.
  • the above-mentioned circuit loss WL is sufficiently smaller than the output power of the discharge lamp 5, and the influence of the external temperature and the like is relatively extremely small, and can be regarded as substantially constant once the circuit configuration is determined. If the value is K2, the following equation (6) holds.
  • the output power W5 of the discharge lamp 5 can be controlled by keeping the output power W1 of the DC power supply 1 constant, that is, by keeping the voltage V22 of the capacitor 22 constant. It can be controlled to a constant level without being affected by the ambient operating temperature, aging, and variations in manufacturing lots.
  • the voltage corresponding to the average value of the current flowing out of the DC power supply 1 is obtained in the capacitor 2 2 by the integration circuit composed of 22.
  • the non-inverting input terminal of the OP amplifier 25 receives the voltage of the capacitor 22, and the inverting input terminal divides the driving power supply VC with the resistors 23 and 24 to obtain a predetermined reference voltage. Is entered. Then, the voltage difference between the voltage of the capacitor 22 and the reference voltage is amplified and output.
  • the output of the OP amplifier 25 is input to the inverting input terminal of the OP amplifier 32, and the non-inverting input terminal of the OP amplifier 32 is divided into the voltage of the drive power supply VC by resistors 27 and 28.
  • the input reference voltage is input.
  • the output When the voltage input to the inverting input terminal of the OP amplifier 32 is higher than the reference voltage of the non-inverting input terminal, the output is low. When the voltage is lower than the reference voltage of the non-inverting input terminal, the output is high.
  • the oscillation frequency of the inverter circuit increases, the current flowing through the voltage detection resistor 20 decreases, and when the output is high, the current flowing through the gate of MOSFET 3 reduces the current through the diode 31 and the resistor 30. Since the current does not flow through the P-amplifier 32, the oscillation frequency of the impulse circuit becomes lower, and the current flowing through the voltage detection resistor 20 increases. In this way, the voltage detected by the voltage detection resistor 20 and converted to the capacitor 22 is controlled so as to always match the predetermined voltage of the inverting terminal of the OP amplifier 25.
  • the output power W1 becomes constant, and the output power W5 of the discharge lamp 5 becomes constant from the above equation (6).
  • the current flowing through the voltage detection resistor 20 decreases until the voltage of the capacitor 22 matches a predetermined voltage of the inverting input terminal of the 0 P amplifier 25.
  • the output potential of the OP amplifier 32 increases, and the circuit acts so that the current flowing through the voltage detection resistor 20 increases. Since the voltage obtained by converting the current detected by the detection resistor 22 is controlled so as to always match the predetermined voltage of the inverting terminal of the OP amplifier 25, the output power W1 of the DC power supply 1 becomes constant, The output power W5 of the discharge lamp 5 becomes constant. As described above, the voltage detected by the voltage detection resistor 20 and converted to the capacitor 22 is controlled so that it always matches the predetermined voltage of the inverting terminal of the OP amplifier. The output power W1 is constant, and the output power W5 of the discharge lamp 5 is constant according to the above equation (6).
  • Embodiment 2 In addition, an expensive and complicated control circuit such as a VCO is not required, and the output power of the discharge lamp 5 can be prevented from being affected by variations in circuit components such as a choke coil and a capacitor with an inexpensive and simple configuration. .
  • Embodiment 2
  • FIG. 2 is a circuit diagram showing a configuration of a discharge lamp lighting device according to Embodiment 2 of the present invention.
  • Reference numeral 35 denotes a variable three-terminal regulator having a reference voltage (for example, a Hitachi 174 series series is equivalent), and the OP amplifier 3 shown in the first embodiment is used. It is used in place of 2 and has the same function as the 0P amplifier 32 except that the internal non-inverting input terminal has its own reference voltage and there is no need to externally supply the reference voltage.
  • 33 is a resistor connected between the connection point of the diode 31 and the resistor 30 and the reference terminal (inverting input terminal) of the variable 3-terminal regulator, and 34 is a resistor connected to the variable 3-terminal regulator. This is a resistor connected between the reference terminal (inverting input terminal) and the low potential side of DC power supply 1.
  • Embodiment 3 The operation is the same as that of the first embodiment, and the description is omitted, but the same effect as that of the first embodiment can be obtained. Embodiment 3.
  • FIG. 3 is a circuit diagram showing a configuration of a discharge lamp lighting device according to Embodiment 3 of the present invention.
  • the same or corresponding parts as those in FIG. 1 of Embodiment 1 and FIG. 2 of Embodiment 2 are denoted by the same reference numerals, and description thereof will be omitted.
  • reference numerals 40 and 41 denote diodes connected from the connection point between the discharge lamp 5 and the coupling capacitor 7 to the high potential side and the low potential side of the DC power supply 1, respectively.
  • the voltage of the discharge lamp 5 rises for some reason, such as at the end of the life of the discharge lamp 5, the voltage of the coupling capacitor 7 whose voltage rises or falls in response to that rise is changed to a diode 40
  • the power supply is bypassed to the DC power supply 1 via the diode 41 to suppress the supply of excessive power from the DC power supply 1 to the discharge lamp 5.
  • Other operations are the same as those in the second embodiment, and a description thereof will not be repeated.
  • FIG. 4 is a circuit diagram showing a configuration of a discharge lamp lighting device according to Embodiment 4 of the present invention.
  • the same or corresponding parts as those in FIG. 1 of the first embodiment, FIG. 2 of the second embodiment, and FIG. 3 of the third embodiment are denoted by the same reference numerals, and description thereof is omitted.
  • Reference numeral 36 denotes a MOS FET in which the n-channel MOSFET in FIG. 3 of the third embodiment is replaced with a p-channel, and the gates of the MOS FET 2 and the MOS FET 3 are shared by the common coil 4.
  • a current detection resistor 20 is inserted at the connection point between the MOS FET 2 and the MOS FET 36 to control the gate of the MOS FET 2 to detect the current. It is configured to control the current flowing through the constant.
  • the operation is the same as that of the third embodiment, and the description is omitted. However, the same effect as that of the third embodiment can be obtained, and the circuit configuration can be simplified.

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  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

L'invention concerne un dispositif d'éclairage pour lampe à décharge qui monté au niveau de l'entrée d'un circuit de charge de lampe à décharge et qui commande des éléments de commutation d'un circuit inverseur au moyen d'enroulements auxiliaires (ab, cd) montés dans le circuit inverseur. Ce dispositif d'éclairage pour lampe à décharge comprend une alimentation électrique en courant continu (1), un circuit inverseur permettant de convertir un courant continu fourni par ladite alimentation électrique (1) en courant à haute fréquence, un circuit de charge de lampe à décharge constitué d'une bobine d'arrêt (4) reliée au circuit inverseur, une lampe à décharge (5) et un condensateur de couplage (7), une résistance de détection de tension (20) montée sur le trajet des éléments de commutation et servant à détecter une tension correspondant au courant du circuit de l'alimentation électrique en courant continu (1) et un circuit de commande (45) servant à commander le pilotage des éléments de commutation de façon que la tension détectée par la résistance de détection de tension (20) soit identique à une tension de référence prédéterminée.
PCT/JP2001/007247 2001-08-24 2001-08-24 Dispositif d'eclairage pour lampe a decharge WO2003019991A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2002565146A JP5147155B2 (ja) 2001-08-24 2001-08-24 放電灯点灯装置
PCT/JP2001/007247 WO2003019991A1 (fr) 2001-08-24 2001-08-24 Dispositif d'eclairage pour lampe a decharge

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2001/007247 WO2003019991A1 (fr) 2001-08-24 2001-08-24 Dispositif d'eclairage pour lampe a decharge

Publications (1)

Publication Number Publication Date
WO2003019991A1 true WO2003019991A1 (fr) 2003-03-06

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ID=11737662

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/007247 WO2003019991A1 (fr) 2001-08-24 2001-08-24 Dispositif d'eclairage pour lampe a decharge

Country Status (2)

Country Link
JP (1) JP5147155B2 (fr)
WO (1) WO2003019991A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008262792A (ja) * 2007-04-11 2008-10-30 Mitsubishi Electric Corp 放電灯点灯装置並びに照明装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62163294A (ja) * 1986-01-14 1987-07-20 松下電工株式会社 放電灯点灯装置
JPH03147294A (ja) * 1989-10-31 1991-06-24 Toshiba Lighting & Technol Corp 放電灯点灯装置
JPH06111976A (ja) * 1992-09-25 1994-04-22 Matsushita Electric Works Ltd インバータ装置
US5349270A (en) * 1991-09-04 1994-09-20 Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen Mbh Transformerless fluorescent lamp operating circuit, particularly for a compact fluorescent lamp, with phase-shifted inverter control
JPH11204283A (ja) * 1998-01-16 1999-07-30 Hitachi Lighting Ltd 放電灯点灯装置
JP2000236674A (ja) * 1999-02-15 2000-08-29 Toshiba Lighting & Technology Corp 電源装置、放電灯点灯装置および照明装置
JP2000243590A (ja) * 1998-12-25 2000-09-08 Toshiba Lighting & Technology Corp 放電灯点灯装置、放電ランプ装置および照明装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11285266A (ja) * 1998-03-30 1999-10-15 Toshiba Tec Corp 電源装置

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62163294A (ja) * 1986-01-14 1987-07-20 松下電工株式会社 放電灯点灯装置
JPH03147294A (ja) * 1989-10-31 1991-06-24 Toshiba Lighting & Technol Corp 放電灯点灯装置
US5349270A (en) * 1991-09-04 1994-09-20 Patent-Treuhand-Gesellschaft F. Elektrische Gluehlampen Mbh Transformerless fluorescent lamp operating circuit, particularly for a compact fluorescent lamp, with phase-shifted inverter control
JPH06111976A (ja) * 1992-09-25 1994-04-22 Matsushita Electric Works Ltd インバータ装置
JPH11204283A (ja) * 1998-01-16 1999-07-30 Hitachi Lighting Ltd 放電灯点灯装置
JP2000243590A (ja) * 1998-12-25 2000-09-08 Toshiba Lighting & Technology Corp 放電灯点灯装置、放電ランプ装置および照明装置
JP2000236674A (ja) * 1999-02-15 2000-08-29 Toshiba Lighting & Technology Corp 電源装置、放電灯点灯装置および照明装置

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008262792A (ja) * 2007-04-11 2008-10-30 Mitsubishi Electric Corp 放電灯点灯装置並びに照明装置

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Publication number Publication date
JP5147155B2 (ja) 2013-02-20
JPWO2003019991A1 (ja) 2004-12-16

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