WO2003011003A1 - Dispositif d'éclairage à lampe à décharge - Google Patents

Dispositif d'éclairage à lampe à décharge Download PDF

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Publication number
WO2003011003A1
WO2003011003A1 PCT/JP2001/006399 JP0106399W WO03011003A1 WO 2003011003 A1 WO2003011003 A1 WO 2003011003A1 JP 0106399 W JP0106399 W JP 0106399W WO 03011003 A1 WO03011003 A1 WO 03011003A1
Authority
WO
WIPO (PCT)
Prior art keywords
discharge lamp
circuit
voltage
power supply
channel
Prior art date
Application number
PCT/JP2001/006399
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 PCT/JP2001/006399 priority Critical patent/WO2003011003A1/fr
Priority to JP2002565157A priority patent/JP4863598B2/ja
Publication of WO2003011003A1 publication Critical patent/WO2003011003A1/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

  • FIG. 4 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 n-channel MOSFETs constituting an inverter circuit
  • 4 is a choke coil for limiting the current of the discharge lamp. It has two sub windings ab, cd.
  • 5 is a discharge lamp
  • 6 is a capacitor connected in parallel with the discharge lamp
  • 7 is a coupling capacitor
  • 10 and 11 are n-channel MOS SFET 2 startup circuits consisting of resistors and capacitors, and two sub-circuits of choke coil 4. Windings ab and cd are connected to respective gates via resistors 8 and 9 so that n-channel MOSFETs 2 and 3 are alternately turned on and off.
  • 20 and 21 are part of the resistor and capacitor
  • 22 and 27 are Zener diodes
  • 23, 24 and 29 are resistors
  • 25 and 26 are transistors
  • 28 and 30 are diodes. .
  • Fig. 5 shows a configuration example of DC power supply 1 when DC power is obtained from a commercial power supply.
  • the AC power output from the commercial power supply 1a is subjected to full-wave rectification by the diode bridge 1b, then smoothed by the smoothing capacitor 1c, and output to the load circuit as DC power. It is composed of
  • a part consisting of a resistor 20 and a capacitor 21 and a Zener diode 2 2 and a resistor 23 connected in series between the connection point of the resistor 20 and the capacitor 21 and the negative electrode of the power supply 1 24, the gate is connected to the connection point of resistors 23, 24, the collector is connected to the connection point of diode 30 and resistor 20 via resistor 29, and the emitter is connected to the negative electrode of power supply 1.
  • Transistor 25 connected to the base of n-channel MOSFET 3 via diode 27 and diode 28 whose collectors are connected in series. Transistor whose emitter is connected to the negative pole of power supply 1.
  • a timer circuit 41 composed of 26 is provided.
  • the Q of the LC resonance circuit including the choke coil 4 and the capacitors 6 and 7 becomes small, and the discharge lamp 5 does not become a cold spot.
  • the power supply from the capacitor 1 C decreases, and the voltage of the capacitor 1 C can be discharged only through the resistors 20 and 29 having a large resistance value thereafter, and decreases only gradually.
  • the evening time is shortened for a period corresponding to the residual voltage of the capacitor 21, and the discharge lamp 5 is cold-started. There was a problem that the life was shortened.
  • the present invention has been made in order to solve the above-described problems of the conventional device, and a first object of the present invention is to provide a low-voltage, inexpensive, small-sized transistor that constitutes an imma circuit, It is another object of the present invention to provide an inexpensive and compact discharge lamp lighting device in which the resistance can be reduced to a low-power and inexpensive small product and the heat loss thereof can be reduced.
  • a second object of the present invention is to provide a stable long-life period even if the power is turned on immediately after the DC power is turned off, and to operate the discharge lamp for a long life without worrying about the cold-sump of the discharge lamp. It is intended to provide a device.
  • a third object of the present invention is to provide a discharge lamp that can suppress an increase in the number of types of components constituting an emergency circuit or the like even when the commercial power supply voltage is AC100 system and AC200V system. It is intended to provide a device. Disclosure of the invention
  • a discharge lamp lighting device comprises: a DC power supply; an inverter circuit for converting DC supplied from the DC power supply to a high-frequency current; And a coil provided on an input side of the discharge lamp load circuit and having a sub winding for generating a voltage for driving a switching element of the above-mentioned circuit. And a timer circuit for controlling the high-frequency current flowing through the discharge lamp load circuit for a predetermined period using the voltage generated in the sub-winding as an operating power supply.
  • the switching element of the inverter circuit is configured to correspond to a pair of n-channel MOSFETs and the sub winding is configured to correspond to the pair of n-channel MOSFETs, respectively.
  • the voltage of the sub winding to be driven is used as the power source of the timer circuit.
  • the transistors constituting the timer circuit can be reduced in size with low withstand voltage and inexpensive.
  • the resistors can be reduced in size with low power and inexpensiveness, and the heat loss can be reduced. can do.
  • the switching element of the inverter circuit is configured to correspond to a pair of n-channel MOSFETs
  • the sub winding is configured to correspond to the pair of n-channel MOSFETs, and drives the high-potential side MOSFET of the n- channel MOSFETs.
  • the voltage of the sub winding is used as a power supply of the timer circuit. This makes it possible to reduce the size of the transistor that constitutes the imitation circuit with low withstand voltage and inexpensive size, and to reduce the resistance with low power and inexpensive size while reducing heat loss. It can be downsized.
  • FIG. 1 is a circuit diagram of a discharge lamp lighting device showing Embodiment 1 of the present invention
  • FIG. 2 is a circuit diagram of a discharge lamp lighting device showing Embodiment 2 of the present invention
  • FIG. 4 is a circuit diagram showing a configuration of a conventional discharge lamp lighting device
  • FIG. 3 is a circuit diagram illustrating a configuration of a DC power supply.
  • FIG. 1 is a circuit diagram showing a configuration of a discharge lamp lighting device according to Embodiment 1 of the present invention. is there.
  • 1 is a DC power supply obtained from a commercial power supply
  • 2 and 3 are switching elements each composed of a pair of n-channel MOS FETs constituting an inverter circuit
  • n-channel MOS FET 2 is a high-potential side
  • n Channel MOSFET 3 is connected to the low potential side.
  • Reference numeral 4 denotes a choke coil for limiting the current of the discharge lamp, which has two sub windings ab and cd.
  • 5 is a discharge lamp
  • 6 is a capacitor connected in parallel with the discharge lamp, and these constitute a discharge lamp load circuit.
  • Numeral 40 denotes a timer circuit for controlling the high-frequency current flowing through the discharge lamp load circuit for a predetermined period by using the voltages generated in the sub windings ab and cd as an operating power source.
  • the circuit 40 is connected in series between the d side of the sub winding cd of the choke coil 4 and the negative electrode of the power supply 1, and a diode 31 rectifies the voltage generated between the sub windings cd and smoothes the rectified voltage.
  • the capacitor 32 for obtaining the operating power supply for the timer circuit is connected in series between the connection point of the diode 31 and the capacitor 32 and the negative electrode of the power supply 1.
  • a zener diode 22 connected in series between the connection point of the capacitor 2 1 and the negative electrode of the power supply 1, resistors 23 and 24, the gate is connected to the connection point of the resistors 23 and 24, and the collector is a diode via a resistor 29.
  • n-channel MOS FET 3 The base of n-channel MOS FET 3 is connected to transistor 25, which is connected to the connection point of resistor 31 and resistor 20, whose emitter is connected to the negative pole of power supply 1, and that the collector is connected in series with zener diode 27 and diode 28, which are connected in series. Connect to Is composed of a transistor 26 which Emitsu evening is connected to the negative pole of the power supply 1.
  • the n-channel MOSFET 2 is first turned on by the starting current from the resistor 10 and the capacitor 11, and an LC series circuit composed of a choke coil 4, a capacitor 6, and a coupling capacitor 7.
  • a current flows through the resonance circuit, and the currents generated in the sub windings ab and cd of the choke coil 4 are fed back to the bases of the n-channel MOS FETs 2 and 3, respectively.
  • SFET 2 turns off, LC series resonance Reverse current flows through the circuit. Thereafter, the same operation is repeated to start oscillation in the resonance circuit.
  • the voltage generated between the sub windings cd of the choke coil 4 is also input to the timer circuit 40, rectified by the diode 31, and the rectified rectified voltage is smoothed by the capacitor 32. It is used as the operating power supply for the evening circuit.
  • the Q of the LC resonance circuit including the choke coil 4, the capacitor 6, and the coupling capacitor 7 decreases, and the discharge lamp 5 is sufficiently preheated so as not to cause a cold start.
  • the transistor 25 is turned on and the transistor 26 is turned off, and the gate current of the n-channel MOS FET 3 is not bypassed. Since the gate voltage increases, the on-time of the n-channel MOS FET 3 returns to its original value and the oscillation frequency decreases, the Q of the LC resonance circuit increases, and a large voltage is generated on the capacitor 6 and The light 5 is turned on.
  • the discharge lamp 5 stops discharging, the oscillation of the n-channel MOS FETs 2 and 3 stops, and the voltage generated in the sub winding cd of the choke coil 4 becomes zero. become.
  • the electric charge charged in the capacitor 32 is discharged through the resistor 29, the base of the transistor 26, and the emitter path of the transistor 26.
  • the electric charge charged in the capacitor 21 is also discharged through the resistor 20 in the same manner.
  • the resistances of the resistors 20 and 29 are selected to be small, the residual charges of the capacitors 32 and 21 can be reduced in a short time without any practical problem.
  • the DC voltage obtained by rectifying and smoothing the commercial power is 100 V DC or more for AC 100 V, and DC 2 V for AC 200 V commercial power. 0 V or more.
  • the driving voltage of the gates of the n-channel MOSFETs 2 and 3 is at most about 10 V or less, and the voltage obtained by the capacitor 32 is one order of magnitude lower than that obtained by directly rectifying and smoothing the commercial power supply. It will be possible to lower it to the extent.
  • the transistor 25 can be a low-voltage, low-cost small product
  • the resistors 20 and 27 can be low-power, low-cost small products, and the heat loss can be reduced.
  • the value of the resistor 29 can be selected to be small.
  • the resistance value of the resistor 20 for obtaining the same time can be reduced.
  • the residual charge of the capacitors 32 and 21 can be reduced in a short time without practical problems, and even if the DC power supply 1 is turned on again, the remaining charge is determined by the resistance 20 and the capacitor 21.
  • the time can be set to a predetermined value, and the discharge lamp can be prevented from cold start.
  • FIG. 2 is a circuit diagram showing a configuration of a discharge lamp lighting device according to Embodiment 2 of the present invention.
  • the output circuit 40 is connected to the gate winding cd of the n-channel MOSFET 3, but in the present embodiment, the output circuit 40 is connected to the gate winding ab of the n-channel MOSFET 2.
  • the same parts as those of FIG. 1 are denoted by the same reference numerals, and the configuration and operation are the same as those of the first embodiment. Are omitted, but the same effect as in the first embodiment can be obtained.
  • FIG. 3 is a circuit diagram showing a configuration of a discharge lamp lighting device according to Embodiment 3 of the present invention.
  • Reference numeral 3 denotes a p-channel MOS FET
  • reference numeral 4 denotes a choke coil for limiting the current of the discharge lamp 5, which comprises a main winding 4a and a sub winding 4b.
  • one of a pair of n-channel MOS SFETs described in the first and second embodiments is used as a complement circuit as a p-channel M0SFET, and an N-channel M0SFET 2 and a P-channel MO SFET 3 are used as switching elements. It is connected to the sub winding 4b of the choke coil 4 for driving the gate in common.
  • the other configuration is the same as that of the second embodiment, and the operation is the same as that of the first embodiment. Therefore, the description is omitted, but the circuit configuration can be simplified, and in the case of the first embodiment. The same effect can be obtained.
  • the embodiment in which the n-channel MOS FET is driven by the voltage generated in the sub-winding of the choke coil and the drive voltage of the timer circuit is obtained has been described. It is apparent that the same effect of the present invention can be obtained even if the sub winding for driving the n-channel MOSFET and the sub winding for the timer circuit are provided independently of the choke coil.

Landscapes

  • Circuit Arrangements For Discharge Lamps (AREA)

Abstract

L'invention concerne un dispositif d'éclairage à lampe à décharge comprenant un système d'alimentation électrique en courant continu (1), un circuit inverseur servant à convertir un courant continu fourni par le système d'alimentation (1) en courant haute fréquence, un circuit de charge de la lampe à décharge servant à éclairer une lampe à décharge au moyen du courant haute fréquence issu du circuit inverseur, une bobine d'arrêt (4) installée sur le côté entrée du circuit de charge de la lampe à décharge et pourvue d'enroulements auxiliaires (ab, cd) servant à générer une tension alimentant des éléments de commutation (2, 3) situés dans le circuit inverseur et un circuit temporiseur (40) servant à commander le courant haute fréquence qui passe à travers le circuit de charge de la lampe à décharge pendant une période prédéterminée en utilisant, comme puissance utile, la tension générée dans les enroulements auxiliaires (ab, cd).
PCT/JP2001/006399 2001-07-25 2001-07-25 Dispositif d'éclairage à lampe à décharge WO2003011003A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/JP2001/006399 WO2003011003A1 (fr) 2001-07-25 2001-07-25 Dispositif d'éclairage à lampe à décharge
JP2002565157A JP4863598B2 (ja) 2001-07-25 2001-07-25 放電灯点灯装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2001/006399 WO2003011003A1 (fr) 2001-07-25 2001-07-25 Dispositif d'éclairage à lampe à décharge

Publications (1)

Publication Number Publication Date
WO2003011003A1 true WO2003011003A1 (fr) 2003-02-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2001/006399 WO2003011003A1 (fr) 2001-07-25 2001-07-25 Dispositif d'éclairage à lampe à décharge

Country Status (2)

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JP (1) JP4863598B2 (fr)
WO (1) WO2003011003A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06163166A (ja) * 1992-11-25 1994-06-10 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
JPH0896982A (ja) * 1994-09-28 1996-04-12 Matsushita Electric Works Ltd 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
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
JP2001157453A (ja) * 1999-11-25 2001-06-08 Matsushita Electric Works Ltd 電源装置

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
JPH06163166A (ja) * 1992-11-25 1994-06-10 Matsushita Electric Works Ltd インバータ装置
JPH0896982A (ja) * 1994-09-28 1996-04-12 Matsushita Electric Works Ltd 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
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
JP2001157453A (ja) * 1999-11-25 2001-06-08 Matsushita Electric Works Ltd 電源装置

Also Published As

Publication number Publication date
JP4863598B2 (ja) 2012-01-25
JPWO2003011003A1 (ja) 2004-11-18

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