WO2005060083A1 - 放電灯点灯装置および照明器具 - Google Patents
放電灯点灯装置および照明器具 Download PDFInfo
- Publication number
- WO2005060083A1 WO2005060083A1 PCT/JP2004/018837 JP2004018837W WO2005060083A1 WO 2005060083 A1 WO2005060083 A1 WO 2005060083A1 JP 2004018837 W JP2004018837 W JP 2004018837W WO 2005060083 A1 WO2005060083 A1 WO 2005060083A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- voltage
- discharge lamp
- frequency
- lighting
- inverter circuit
- Prior art date
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
- H05B41/295—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 and specially adapted for lamps with preheating electrodes, e.g. for fluorescent lamps
-
- 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
- H05B41/39—Controlling the intensity of light continuously
- H05B41/392—Controlling the intensity of light continuously using semiconductor devices, e.g. thyristor
-
- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/42—Circuits or arrangements for compensating for or adjusting power factor in converters or inverters
-
- 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
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Definitions
- the present invention relates to a discharge lamp lighting device and a lighting fixture.
- a discharge lamp lighting device As a discharge lamp lighting device, a pair of switch elements are connected in series to a DC power supply, and a resonance load circuit including an inductor, a capacitor and a discharge lamp is connected in parallel to one of the switch elements, It is known that a DC voltage is converted into a high-frequency voltage by a switching operation of each switch element and supplied to a discharge lamp, and the power loss of the switch element and the inductor is reduced to improve the power conversion efficiency. (See, for example, JP-A-10-243661).
- the present invention provides a discharge lamp lighting device and a lighting fixture that can reduce reactive power and improve power conversion efficiency.
- the present invention further provides a discharge lamp lighting device and a lighting fixture capable of reducing the size of the inductor and stably lighting and maintaining the discharge lamp.
- the present invention further provides a discharge lamp lighting device and a lighting fixture capable of sufficiently securing a control width of an output voltage.
- the invention according to claim 1 provides an inverter circuit that controls a switch element to turn on and off to convert a DC power supply voltage to a high-frequency voltage; a high-frequency voltage is supplied from the inverter circuit, and the inductor, the capacitor, and a predetermined lighting frequency fs are supplied.
- a resonant load circuit comprising a discharge lamp to be lit, and an eccentric force S-20d eg—40 deg with respect to a lighting frequency fs at an impedance when the discharge lamp is in rated operation; a lighting cycle of the discharge lamp In a shorter period, a pulse voltage for driving the switch element on and off is continuously generated.
- a control circuit that performs pulse width modulation on the ON width of the source voltage in accordance with a waveform change of a sine wave voltage corresponding to the lighting cycle, and controls the inverter circuit to supply a substantially sine wave current to the discharge lamp; It is a discharge lamp lighting device characterized by comprising:
- FIG. 1 is a circuit configuration diagram including partial blocks showing a first embodiment of the present invention.
- FIG. 2 is a diagram showing an operation reference frequency in a preheating period, a starting voltage application period, and a lighting maintenance control period and a frequency change at the time of each transition in the embodiment.
- FIG. 3 is a diagram showing a drive signal waveform for driving the MOSFET on and off in the same embodiment.
- FIG. 4 is a diagram showing a voltage waveform generated between both ends of a MOSFET of the inverter circuit according to the embodiment.
- FIG. 5 is a view showing a waveform of a voltage applied to a discharge lamp in the embodiment.
- FIG. 6 is a circuit configuration diagram showing a second embodiment of the present invention.
- FIG. 7A is a sine wave voltage waveform diagram output from a sine wave voltage source according to the same embodiment.
- FIG. 7B is a pulse-width-modulated pulse voltage waveform diagram output from the comparator in the same embodiment.
- FIG. 8 is a circuit diagram showing a third embodiment of the present invention.
- FIG. 9A is a voltage waveform diagram output from the multiplier according to the embodiment.
- FIG. 9B is a waveform diagram of a pulse voltage output from the comparator according to the embodiment.
- FIG. 9C is a diagram showing a pulse voltage waveform output from the comparator according to the embodiment.
- FIG. 9D is a waveform diagram of a current flowing through the discharge lamp in the same embodiment.
- FIG. 10 is a circuit configuration diagram showing a fourth embodiment of the present invention.
- FIG. 11A is a voltage waveform output from the voltage-controlled oscillator according to the embodiment.
- FIG. 11B is a waveform diagram of a pulse voltage output from the comparator according to the embodiment.
- FIG. 11C is a waveform diagram of a pulse voltage output from the comparator according to the embodiment.
- FIG. 11D is a waveform diagram of a current flowing through the discharge lamp in the same embodiment.
- FIG. 12 is a waveform diagram showing amplitudes of a triangular wave signal and a sine wave signal according to a fifth embodiment of the present invention.
- FIG. 13 is a view showing a pulse width modulated pulse voltage waveform output from a comparator in the same embodiment.
- FIG. 14 is a graph showing the effective values of the frequency fs component and the frequency fc component included in the pulse voltage waveform output from the comparator and the effective value of the sum in the same embodiment.
- FIG. 15 is a diagram showing an output voltage waveform of the inverter circuit in the same embodiment.
- FIG. 16 is a circuit diagram showing an equivalent circuit of the resonance load circuit in the embodiment.
- FIG. 17 is a diagram showing output voltage characteristics generated across a resistor R when power of each frequency is supplied from the power supply to the equivalent circuit shown in FIG. 16 while changing its effective value.
- FIG. 19 is a view for explaining an argument of the resonance load circuit according to the sixth embodiment of the present invention.
- FIG. 20 is a graph showing a relationship between the argument and power VA generated in inductor component Lr in the same embodiment.
- FIG. 21 is a graph showing the power VA generated in the inductor component Lr with respect to the DC power supply voltage VDC when the impedance deflection angle of the resonance load circuit is set to Odeg in the seventh embodiment of the present invention. It is.
- FIG. 22 is a diagram showing an output voltage waveform of the inverter circuit in the same embodiment.
- FIG. 23 shows the inductor component Lr of the resonant load circuit, the loss of the switching element, and the sum of these losses when the frequency fc of the pulse voltage is changed in the eighth embodiment of the present invention. It is a graph shown.
- FIG. 24 is a perspective view of a lighting fixture according to a ninth embodiment of the present invention.
- a high-frequency inverter circuit 2 is connected to a DC power supply 1.
- the high frequency inverter circuit 2 connects a series circuit of a pair of MOS type FETs 3 and 4 to the DC power supply 1 as a switch element, and connects a drain terminal of the FET 4 to a first capacitor 5 and an inductor 6 in series.
- the discharge lamp 7 is connected to one end of one filament electrode 7a of the discharge lamp 7 and the source terminal is connected to one end of the other filament electrode 7b of the discharge lamp 7.
- a second capacitor 8 for flowing a preheating current is connected between the other ends of the filament electrodes 7a and 7b of the discharge lamp 7.
- the inductor 6, the discharge lamp 7, and the second capacitor 8 constitute a resonance load circuit including an LC series resonance circuit.
- the first capacitor 5 is a DC cut capacitor.
- Diodes 9 and 10 are connected in parallel to the MOS FETs 3 and 4 as parasitic diodes.
- Driving circuits 11 and 12 are connected to the gates of the MOS type FETs 3 and 4, respectively.
- the driving circuits 11 and 12 are driven and controlled by signals from a CPU 13 constituting a control circuit. I have.
- the drive circuit 11 is composed of a pair of MOS FETs 14 and 15, and the drive circuit 12 is composed of a pair of MOS FETs 16 and 17, each of which amplifies a signal from the CPU 13 to generate each of the MOS FETs 3. , 4 are supplied with on / off drive signals.
- the CPU 13 has a built-in timer and controls the timing of signals supplied to the drive circuits 11 and 12 based on a sequence program and data stored in the memory 18. It has become. That is, when the start operation is started, the CPU 13 first preheats the discharge lamp 7 for a certain period of time as shown in FIG. 2, and then applies a high voltage for starting for a certain period of time as shown in FIG. Is to perform the lighting maintenance control.
- the CPU 13 sets the operating frequency to a high reference frequency during the preheating period, outputs a signal to the driving circuits 11 and 12 based on the reference frequency, and the driving circuits 11 and 12 output the signals based on the reference frequency.
- the MOS type FETs 3 and 4 are alternately driven for switching.
- a starting voltage application period starts, and the operating frequency is reduced to switch to the reference frequency at the time of starting.
- the operating frequency is not reduced rapidly in a short time of the order of msec, but is reduced stepwise and shifted to the reference frequency at the start.
- the change period for stepwise reduction is set to, for example, about 10 msec.
- a high starting voltage is applied to the discharge lamp 7.
- the CPU 13 sets a lighting cycle (1 / lighting frequency) as a lighting cycle when the discharge lamp 7 is lit at high frequency by the high frequency voltage from the high frequency inverter circuit 2.
- Is T one cycle of this lighting cycle T is divided into 10 as n divisions, and a pulse voltage for turning on and off the MOS FETs 3 and 4 is generated in each section, and the ON width of this pulse voltage is determined as the lighting cycle. It changes according to the waveform change of the sine wave voltage corresponding to T. In other words, pulse width modulation is performed so that the ON width changes from medium ⁇ large ⁇ medium ⁇ small ⁇ medium ⁇ large in accordance with the peak value, average value, or absolute value of the effective value of each section. You.
- the CPU 13 supplies the pulse-width-modulated signal to the drive circuit 11, and supplies the drive signal shown in FIG. Further, the CPU 13 supplies a signal whose on / off is completely opposite to the signal supplied to the drive circuit 11 to the drive circuit 12, and supplies a drive signal from the drive circuit 12 to the MOSFET 4 to perform on / off drive.
- the CPU 13 is connected to the pair of M-S type FETs 3 of the inverter circuit 2. 4 are turned on and off at such timing, a pulse voltage as shown in FIG. 4 is generated between both ends of the MOS type F ⁇ 4 of the inverter circuit 2, and the pulse voltage waveform is changed to the first capacitor. 5, the inductor 6, the discharge lamp 7, and the second capacitor 8 are supplied to a resonance load circuit. In the resonance load circuit, harmonic components are removed by the filter effect of the inductor 6 and the capacitor 8, and the voltage waveform applied to the discharge lamp 7 becomes a substantially sinusoidal voltage waveform as shown in FIG. As a result, a substantially sinusoidal current flows through the discharge lamp 7.
- the lighting total of the discharge lamp 7 is divided into ten, and the MOS type FETs 3, 4 are turned on and off in each of the divided sections.
- a pulse voltage is generated, and the pulse width modulation is performed so that the ON width of the pulse voltage changes from medium ⁇ large ⁇ medium ⁇ small ⁇ medium ⁇ large according to the waveform change of the sine wave voltage corresponding to lighting cycle ⁇ .
- a substantially sinusoidal current can be supplied from the inverter circuit 2 to the discharge lamp 7, so that the reactive power can be reduced. Thereby, the power conversion efficiency can be improved.
- the operating frequency is reduced to the reference frequency at the time of starting to apply a starting voltage. Since the operating frequency is sometimes reduced stepwise to shift to the reference frequency at the time of starting, the circuit stress at the time of the shifting can be reduced, and there is no possibility that the circuit element will be destroyed at the time of starting.
- the reference frequency also decreases when the power discharge lamp 7 is turned on at the time of starting. In this case, too, the reference frequency is decreased stepwise to shift to the reference frequency for maintaining the lighting, so that the circuit stress can be reduced.
- a hardware circuit is used in place of the CPU to control on / off of each of the MS FETs 3 and 4 of the inverter circuit 2. That is, a sine wave voltage source 21 that generates a sine wave voltage of a frequency fL, and a triangular wave signal source 2 that generates a triangular wave signal having a frequency that is an integral multiple of the sine wave voltage frequency fL generated from the sine wave voltage source 21 And the sine wave voltage from the sine wave voltage source 21 and the triangular wave signal from the triangular wave signal source 22.
- the comparator 23 outputs a high-level signal when the sine wave voltage is higher than the triangular signal voltage, and outputs a low-level signal when the sine wave signal voltage is equal to or lower than the triangular signal voltage, and drives the output signal of the comparator 23. It is supplied to the circuit 11 and to the drive circuit 12 via the inversion circuit 24.
- the frequency fL of the sine wave voltage generated from the sine wave voltage source 21 corresponds to the lighting cycle of the discharge lamp 7, that is, the lighting frequency.
- the pulse voltage in each section changes between a high level and a low level according to the average value of the sine wave voltage in the section, and the smaller the average value, the longer the period during which the low level is output. Is larger, the period during which the high level is output becomes longer. In this manner, pulse width modulation is performed according to the average value in the section of the sine wave voltage.
- the drive circuit 11 drives the MOS FET 3 on and off by a drive signal having the same waveform as that of FIG. 7B, and the drive circuit 12 turns on and off the MOS FET 4 by a drive signal having a waveform inverted from the waveform of FIG. 7B. Drive off.
- a pulse voltage as shown in FIG. 4 is generated between both ends of the MOS FET 4 of the inverter circuit 2 in the same manner as in the above-described first embodiment.
- the harmonic components of the voltage are removed by the filter effect of the inductor 6 and the capacitor 8.
- a substantially sinusoidal voltage waveform as shown in FIG. 5 is applied to the discharge lamp 7.
- a substantially sinusoidal current flows through the discharge lamp 7. Therefore, also in this embodiment, an effect is obtained that the reactive power can be reduced and the power conversion efficiency can be improved.
- the lamp current is detected to perform feedback control.
- a lamp current detecting means is provided on the other filament electrode 7b of the discharge lamp 7.
- the transformer 25 to be formed is connected. That is, one end of the first and second windings 25a and 25b is connected to each end of the filament electrode 7b, the other end of the first winding 25a is connected to the source terminal of the MOS FET 4, and the second The other end of the winding 25b is connected to the capacitor 8.
- a third winding 25c magnetically coupled to each of the windings 25a and 25b is provided, and an input terminal of a full-wave rectifier circuit 26 composed of a diode bridge is provided between both ends of the winding 25c. I'm tying it up.
- a parallel circuit of a resistor 27 and a capacitor 31 is connected between the output terminals of the full-wave rectifier circuit 26, and an output voltage generated between the output terminals is applied to an inverting input terminal (-) of an error amplifier 28 via a resistor 32.
- a reference voltage Vref ⁇ is supplied to a non-inverting input terminal (+) of the error amplifier 28.
- the error amplifier 28 amplifies and outputs the difference between the output voltage from the full-wave rectifier circuit 26 and the reference voltage Vref.
- the output from the error amplifier 28 is supplied to a multiplier 29.
- the multiplier 29 receives a sine wave voltage from the sine wave voltage source 21.
- the multiplier 29 multiplies the sine wave voltage from the sine wave voltage source 21 by the output from the error amplifier 28 to vary the amplitude of the sine wave voltage and supplies the sine wave voltage to the comparator 23.
- the comparator 23 compares the sine wave voltage from the multiplier 29 with the triangular wave signal from the triangular wave signal source 22.
- the lamp current flowing through the discharge lamp 7 is detected by the transformer 25. That is, when the lamp current flows through the first winding 25a, a voltage is induced in the third winding 25c. At this time, the influence of the current flowing through the capacitor 8 is eliminated by the relationship between the first winding 25a and the second winding 25b. Thus, a voltage is induced in the third winding 25c by only the lamp current.
- the voltage is applied as an AC voltage to the input terminal of the full-wave rectifier circuit 26. Then, a full-wave rectified voltage is output from an output terminal of the full-wave rectification circuit 26, and the full-wave rectified voltage is smoothed by a parallel circuit of the resistor 27 and the capacitor 31, and becomes a DC voltage. This DC voltage is input to the inverting input terminal (-) of the error amplifier 28.
- the error amplifier 28 When the lamp current in the discharge lamp 7 is in a steady state, the error amplifier 28 The DC voltage input to the input terminal (-) becomes substantially equal to the reference voltage Vref, and at this time, the output from the error amplifier 28 becomes substantially equal to Vref. Accordingly, the voltage waveform from the multiplier 29 becomes a voltage waveform substantially equal to the voltage obtained by multiplying the sine wave voltage waveform from the sine wave voltage source 21 by Vref as shown by a waveform V10 in FIG. 9A).
- the comparator 23 compares the sine-wave voltage waveform from the multiplier 29 with the triangular-wave signal from the triangular-wave signal source 22, and goes high when the sine-wave voltage from the multiplier 29 is higher than the triangular-wave signal voltage from the triangular-wave signal source 22.
- the sine wave voltage from the multiplier 29 is lower than the triangular wave signal voltage from the triangular wave signal source 22, a low-level signal is output, and the pulse voltage output from the comparator 23 is as shown in FIG. Become. Therefore, at this time, a voltage waveform as shown by a waveform V20 in FIG. 9D is applied to the discharge lamp 7.
- the pulse voltage output from the comparator 23 is controlled so that the low-level period becomes longer in the period tl and becomes shorter in the period t2 as shown in FIG. 9C. Voltage.
- the waveform of the current flowing through the discharge lamp 7 has a smaller amplitude as shown by the waveform V21 in FIG. 9D, and the increase in the lamp current is suppressed.
- the lamp current flowing through the discharge lamp 7 is kept constant.
- the current limiting effect of the lamp current is obtained by such feedback control, a sufficient current limiting operation can be obtained as a whole even if an inductor 6 having a small capacity is used. Therefore, the discharge lamp can be stably lit and maintained.
- the power conversion efficiency can be improved by simple control as in the above-described embodiment.
- a lamp current is detected and feedback control is performed. Note that the same parts as those in the third embodiment or corresponding parts are denoted by the same reference numerals, and detailed description is omitted.
- a voltage controlled oscillator (VC ⁇ ) 30 is used instead of the sine wave voltage source 21 and the multiplier 29 in FIG.
- Other configurations are the same as those in FIG.
- the output from the error amplifier 28 is supplied to the voltage controlled oscillator 30, and the output of the voltage controlled oscillator 30 is supplied to the comparator 23.
- the voltage-controlled oscillator 30 makes the frequency of the sine wave voltage output as shown by the waveform V31 in FIG. 11A higher than the reference frequency fL.
- the sine wave voltage output from the voltage controlled oscillator 30 is compared with the triangular wave signal voltage from the triangular wave signal source 22 in the comparator 23.
- the comparator 23 outputs a high-level signal when the sine wave voltage from the voltage controlled oscillator 30 is higher than the triangular wave signal voltage from the triangular wave signal source 22, and the sine wave voltage from the voltage controlled oscillator 30 three A low level signal is output when the voltage is equal to or lower than the square wave signal voltage. Therefore, when the frequency of the sine wave voltage output from the voltage controlled oscillator 30 increases, the pulse voltage output from the comparator 23 changes as shown in FIG. 11C. As a result, the voltage applied to the discharge lamp 7 increases in frequency as shown by the waveform V41 in FIG.
- the lamp current flowing through the discharge lamp 7 is kept constant.
- a current limiting effect of the lamp current can be obtained. Therefore, even if an inductor 6 having a small capacity is used, a sufficient current limiting effect can be obtained as a whole. Therefore, the discharge lamp can be stably lit and maintained.
- the power conversion efficiency can be improved by simple control as in the above-described embodiment.
- the lighting frequency of the discharge lamp 7 is fs
- the frequency of the pulse voltage output from the comparator 23 is fc (> fs). Then, in the output voltage-frequency characteristics of the resonant load circuit using the rated load, the output voltage Vs at the frequency fs component and the output voltage Vc at the frequency fc component are set so that Vs> Vc. , To state.
- the output voltage supplied to the discharge lamp 7 as a load can be varied by changing the sine wave voltage from the sine wave voltage source 21, and the output voltage can be controlled. A sufficient width can be secured.
- the amplitude of the triangular wave signal S1 from the triangular wave signal source 22 is set to 1
- the amplitude of the sine wave signal S2 from the sinusoidal voltage source 21 is 0.8
- the lighting frequency fs of the discharge lamp 7 is 5 OkHz
- the frequency fc of the pulse voltage output from the comparator 23 is 1 MHz
- the comparator 23 When the voltage of the sine wave signal S2 is higher than the voltage of the triangular signal S1, the output is set to "1", and when the voltage of the sine wave signal S2 is lower than the voltage of the triangular signal S1, the output is set to "0".
- the pulse width modulated pulse voltage waveform output from is shown in FIG.
- the effective value of the frequency fs component is approximately 0.4, and the effective value of the frequency fc component is approximately 0.7.
- the amplitude of the sine wave signal S2 is 0.8, the effective value of the frequency fs component and the effective value of the frequency fc component are approximately 0.6, and when the amplitude of the sine wave signal S2 is 1.0, the frequency fs It can be seen that the effective value of the component is approximately 0.7, and the effective value of the frequency fc component is inverted to approximately 0.4. Also, it can be seen that when the amplitude of the sine wave signal S2 is 0.4 or more, the sum of the effective value of the frequency fs component and the effective value of the frequency fc component is constant at approximately 1.13.
- the pulse voltage from the comparator 23 is supplied to the drive circuit 11 to drive the MOS FET 3 of the inverter circuit 2 for switching, and the pulse voltage is inverted by the inversion circuit 24 and supplied to the drive circuit 12.
- the MOS type FET 4 of the inverter circuit 2 When the MOS type FET 4 of the inverter circuit 2 is switched and driven, the inverter circuit 2 generates the output voltage of which the width is modulated as shown in FIG. 15, and the first capacitor 5, the inductor 6, the discharge lamp 7, and the Supplied to the resonant load circuit consisting of two capacitors 8. At this time, an output according to the frequency characteristics of the resonance load circuit is supplied to the discharge lamp 7 as a load.
- Lr indicates an inductor component
- Cf indicates a capacitor component
- R indicates an equivalent load resistance of the discharge lamp 7 during rated operation.
- the resonance frequency (1 / 2 ⁇ Lr'Cf) of the resonance load circuit is set to be higher than the frequency fs and lower than the frequency fc.
- the solid line graph gll in FIG. 17 shows the case where the AC effective value is approximately 0.4, and the solid line graph gl2 shows the case where the AC effective value is approximately 0.7. This corresponds to the case where the amplitude of the sine wave signal S2 is 0.6.
- the present inventor considers that the output voltage Vs at the frequency fs is made different from the output voltage Vc at the frequency fc, and from the characteristics of FIG. 17, the force for changing the inductor component Lr and the capacitor component Cf, By changing fc, Vs> Vc can be set, so experiments were conducted on this.
- the final output supplied to 7 changes as shown by the graph g4 in FIG. That is, assuming that the lighting frequency of the discharge lamp 7 is fs and the frequency of the pulse voltage output from the comparator 23 is fc (> fs), the resonance load using the equivalent load resistance at the rated operation of the discharge lamp 7 is used.
- the frequency characteristics of the output voltage of the circuit if the output voltage Vs at the frequency fs component and the output voltage Vc at the frequency fc component and the force Vs> Vc are set, the amplitude of the sine wave voltage from the sine wave voltage source 21 By changing the output voltage, the output voltage supplied to the discharge lamp 7 can be varied, and the control width of the output voltage can be sufficiently secured.
- present embodiment is not limited to the force described in the second embodiment and is not limited to the first embodiment.
- third and fourth embodiments are also applicable to the first embodiment. It can also be applied to forms.
- the equivalent load resistance at the rated operation of the discharge lamp 7 is used.
- the output voltage Vs at the frequency fs component, the output voltage Vc at the frequency fc component, and the force Vs> Vc are set so that the rated load is further reduced.
- the condition is that the angle of deviation of the impedance of the used resonance load circuit with respect to the lighting frequency fs of the discharge lamp 7 is set between -20 deg to 40 deg.
- the imaginary part can be reduced by reducing the argument from the vector in FIG. This will reduce reactive power. Therefore, in the resonant load circuit, in order to reduce the reactive power and reduce the circuit loss, it is possible to specify the deviation angle of the impedance Z of the resonant load circuit.
- DC voltage VDC 350V
- lighting frequency fs 20kHz
- pulse voltage frequency fc 200kHz
- the equivalent resistance of rated operation of discharge lamp 7 is 300 ⁇
- the rated current of discharge lamp 7 is 0.37A.
- the equivalent load resistance at the rated operation of the discharge lamp 7 is used.
- the output voltage Vs at the frequency fs component, the output voltage Vc at the frequency fc component, and the force Vs> Vc are set so that the impedance of the resonant load circuit using the rated load.
- the deflection angle of the discharge lamp 7 with respect to the lighting frequency fs is set between 1 lOdeg and 40 deg
- the load voltage generated in the resonance load circuit using the rated load is further included.
- the inverter circuit 2 is marked so that the effective value VLrais of the lighting frequency fs component of the discharge lamp 7 and the effective value Virms of the lighting frequency fs component of the discharge lamp 7 included in the output voltage of the inverter circuit 2 are approximately equal.
- the condition is that the DC power supply voltage VDC from the DC power supply 1 to be applied is set It is.
- the lighting frequency fs of the discharge lamp 7 is 20 kHz
- the frequency of the pulse voltage fc is 200 kHz
- the sine wave voltage source for the triangle wave signal from the triangle wave signal source 22 is used.
- the modulation degree of the sine wave voltage generated from 21 is 0.9
- the rated current of the discharge lamp 7 is 0.37A
- the lamp voltage is 113V
- the first capacitor 5, inductor 6, the impedance declination of the resonant load circuit consisting of the discharge lamp 7 and the second capacitor 8 is set to Odeg
- the graph in Fig. 21 shows that the power VA generated in the inductor component Lr decreases as the DC power supply voltage VDC increases, and the inductor 6 used decreases as the DC power supply voltage VDC increases. Show that it can be
- the output voltage supplied from the inverter circuit 2 to the resonance load circuit is a pulse width modulation waveform, and this waveform includes the frequency component of the sine wave voltage and the frequency component of the pulse voltage. Since the triangular wave signal having the amplitude of 1 is modulated with the sine wave voltage having the amplitude of 0.9, the modulation degree of the output voltage from the inverter circuit 2 is also 0.9. That is, the output voltage of the inverter circuit 2 has a voltage waveform as shown in FIG.
- Virms is the effective value of the lighting frequency fs component of the discharge lamp 7 included in the output voltage of the inverter circuit 2
- ⁇ is the modulation factor.
- DC power supply voltage VDC can be set high, whereby power VA generated in inductor component Lr can be reduced, and circuit loss in the resonant load circuit can be reduced. Further, since the power VA generated in the inductor component Lr can be reduced, the size of the inductor 6 used can be reduced.
- the lighting frequency fs of the discharge lamp 7 is 20 kHz, and the sinusoidal wave generated from the sinusoidal voltage source 21 with respect to the triangular wave signal from the triangular wave signal source 22.
- the voltage modulation factor is 0.9
- the impedance at the lighting frequency fs of the discharge lamp is the load
- the deflection angle of the impedance of the resonant load circuit at the lighting frequency fs is Odeg
- the pulse voltage frequency fc The inductance component Lr of the resonant load circuit and the losses of the switching elements 3 and 4 when the value is changed can be determined.
- the frequency fc be 5 times or less the lighting frequency fs. That is, in this embodiment, the frequency fc of the pulse voltage is 30 kHz to 100 kHz, and the preferable range is 30 kHz to 50 kHz.
- FIG. 24 shows a lighting fixture 100, which is a socket 1 of a lighting fixture body 101. 02, a discharge lamp 103 is mounted therein, and the discharge lamp lighting device of any of the above-described embodiments is incorporated therein as a discharge lamp lighting device 104, and the discharge lamp 103 is lit by the discharge lamp lighting device 104. I have.
- a lighting fixture including the discharge lamp lighting device of each of the above-described embodiments can be realized. That is, a lighting fixture that can improve the power conversion efficiency can be realized. In addition, when a discharge lamp lighting device that performs feedback control is used, a lighting fixture that can stably maintain the discharge lamp even when the inductor 6 is reduced can be realized.
- the control range of the output voltage is sufficient. Lighting equipment that can be secured can be realized. Furthermore, by setting the declination of the impedance of the resonance load circuit with respect to the discharge lamp lighting frequency fs between 1 lOdeg and 40deg, the discharge lamp lighting frequency included in the load voltage generated in the resonance load circuit is further increased. Circuit loss can be reduced by setting the DC power supply voltage so that the effective value VLrms of the fs component and the effective value Virms of the discharge lamp fs component included in the output voltage of the inverter circuit 2 are approximately equal. Thus, a lighting device that can reduce the size of the inductor can be realized.
- the present invention can be used for a discharge lamp lighting device and a lighting fixture that can reduce reactive power and improve power conversion efficiency.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005516346A JPWO2005060083A1 (ja) | 2003-12-17 | 2004-12-16 | 放電灯点灯装置および照明器具 |
EP04807196A EP1696547A4 (en) | 2003-12-17 | 2004-12-16 | OPERATING DEVICE AND LIGHT FRAME FOR A DISCHARGE LAMP |
US11/302,356 US7211970B2 (en) | 2003-12-17 | 2005-12-14 | Discharge lamp lighting device and lighting unit |
HK07101633.4A HK1097113A1 (en) | 2003-12-17 | 2007-02-12 | Discharge lamp operation device and lighting fixture |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003419269 | 2003-12-17 | ||
JP2003-419269 | 2003-12-17 | ||
JP2004085638 | 2004-03-23 | ||
JP2004-085638 | 2004-03-23 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/302,356 Continuation US7211970B2 (en) | 2003-12-17 | 2005-12-14 | Discharge lamp lighting device and lighting unit |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2005060083A1 true WO2005060083A1 (ja) | 2005-06-30 |
Family
ID=34703287
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/018837 WO2005060083A1 (ja) | 2003-12-17 | 2004-12-16 | 放電灯点灯装置および照明器具 |
Country Status (7)
Country | Link |
---|---|
US (1) | US7211970B2 (ja) |
EP (1) | EP1696547A4 (ja) |
JP (1) | JPWO2005060083A1 (ja) |
KR (1) | KR100721631B1 (ja) |
HK (1) | HK1097113A1 (ja) |
TW (1) | TWI258322B (ja) |
WO (1) | WO2005060083A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012028259A (ja) * | 2010-07-27 | 2012-02-09 | Panasonic Electric Works Co Ltd | 放電灯点灯装置および放電灯点灯装置を備える照明器具 |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7423388B2 (en) * | 2006-02-15 | 2008-09-09 | Monolithic Power Systems, Inc. | Fixed lamp frequency synchronization with the resonant tank for discharge lamps |
EP1903598A3 (en) * | 2006-09-22 | 2010-01-06 | Toshiba Lighting & Technology Corporation | High-pressure discharge lamp, high-pressure discharge lamp operating apparatus, and illuminating apparatus. |
EP2091304A4 (en) * | 2006-10-27 | 2011-04-27 | Toshiba Lighting & Technology | HIGH-PRESSURE DISCHARGE LAMP, ILLUMINATOR AND HIGH-PRESSURE DISCHARGE LAMP UNIT |
KR100859063B1 (ko) * | 2007-04-18 | 2008-09-17 | 엘지이노텍 주식회사 | 백라이트 인버터에서의 구동 회로 |
US7459867B1 (en) * | 2007-05-11 | 2008-12-02 | Osram Sylvania Inc. | Program start ballast |
DE102008058819A1 (de) * | 2007-11-28 | 2009-06-25 | Toshiba Lighting & Technology Corp. | Entladungslampenzündvorrichtung |
EP2112684A3 (en) * | 2008-04-25 | 2010-06-16 | Toshiba Lighting & Technology Corporation | High-pressure discharge lamp and lighting equipment |
US20100033106A1 (en) * | 2008-08-08 | 2010-02-11 | Toshiba Lighting & Technology Corporation | High-pressure discharge lamp, high-pressure discharge lamp lighting system and lighting equipment |
JP5053395B2 (ja) * | 2010-01-29 | 2012-10-17 | Tdkラムダ株式会社 | 放電灯点灯装置 |
KR101658210B1 (ko) * | 2010-02-19 | 2016-09-21 | 페어차일드코리아반도체 주식회사 | 예열 제어 장치, 이를 포함하는 램프 구동 장치및 예열 제어 방법 |
JP6244806B2 (ja) * | 2013-10-17 | 2017-12-13 | セイコーエプソン株式会社 | 放電ランプ点灯装置、放電ランプ点灯方法及びプロジェクター |
KR101529860B1 (ko) * | 2014-02-10 | 2015-06-19 | (주) 포코 | 디밍이 가능한 전류 피드백 제어 방식의 형광등용 안정기 및 그 전류 피드백 제어 방법 |
KR101701699B1 (ko) | 2015-12-28 | 2017-02-03 | (주) 포코 | 전자식 형광등용 안정기 및 그 점등 제어 방법 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02202365A (ja) * | 1989-01-26 | 1990-08-10 | Matsushita Electric Works Ltd | 電源装置 |
JPH11220889A (ja) * | 1998-01-30 | 1999-08-10 | Toshiba Lighting & Technology Corp | 電源装置、放電灯点灯装置および照明装置 |
JP2001052889A (ja) * | 1999-08-11 | 2001-02-23 | Matsushita Electric Works Ltd | 放電灯点灯装置 |
JP2002324688A (ja) * | 2001-04-24 | 2002-11-08 | Matsushita Electric Works Ltd | 放電灯点灯装置、及びこれを用いた照明器具 |
JP2003224981A (ja) * | 2002-01-28 | 2003-08-08 | Matsushita Electric Works Ltd | 放電ランプ点灯装置 |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH038299A (ja) * | 1989-06-02 | 1991-01-16 | Koito Mfg Co Ltd | 車輌用高圧放電灯の点灯回路 |
JPH0728537B2 (ja) * | 1989-06-02 | 1995-03-29 | 三菱電機株式会社 | インバータ出力電圧誤差の補正装置 |
US5804924A (en) * | 1995-07-26 | 1998-09-08 | Matsushita Electric Works, Ltd. | Discharge lamp with two voltage levels |
DE19546588A1 (de) * | 1995-12-13 | 1997-06-19 | Patent Treuhand Ges Fuer Elektrische Gluehlampen Mbh | Verfahren und Schaltungsanordnung zum Betrieb einer Entladungslampe |
US5774351A (en) * | 1996-05-21 | 1998-06-30 | National Science Council | Series resonant DC-to-AC inverter system |
JP3698226B2 (ja) | 1996-12-25 | 2005-09-21 | 東芝ライテック株式会社 | 電源装置、放電灯点灯装置および照明装置 |
JP2933077B1 (ja) * | 1998-02-26 | 1999-08-09 | サンケン電気株式会社 | 放電灯点灯装置 |
US6680582B1 (en) * | 2000-10-06 | 2004-01-20 | Koninklijke Philips Electronics N.V. | System and method for employing pulse width modulation for reducing vertical segregation in a gas discharge lamp |
JP4561350B2 (ja) * | 2004-12-20 | 2010-10-13 | 東芝ライテック株式会社 | 放電灯点灯装置及び照明器具並びに照明システム |
-
2004
- 2004-12-14 TW TW093138695A patent/TWI258322B/zh not_active IP Right Cessation
- 2004-12-16 KR KR1020057024056A patent/KR100721631B1/ko not_active IP Right Cessation
- 2004-12-16 JP JP2005516346A patent/JPWO2005060083A1/ja not_active Withdrawn
- 2004-12-16 EP EP04807196A patent/EP1696547A4/en not_active Withdrawn
- 2004-12-16 WO PCT/JP2004/018837 patent/WO2005060083A1/ja active IP Right Grant
-
2005
- 2005-12-14 US US11/302,356 patent/US7211970B2/en not_active Expired - Fee Related
-
2007
- 2007-02-12 HK HK07101633.4A patent/HK1097113A1/xx not_active IP Right Cessation
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02202365A (ja) * | 1989-01-26 | 1990-08-10 | Matsushita Electric Works Ltd | 電源装置 |
JPH11220889A (ja) * | 1998-01-30 | 1999-08-10 | Toshiba Lighting & Technology Corp | 電源装置、放電灯点灯装置および照明装置 |
JP2001052889A (ja) * | 1999-08-11 | 2001-02-23 | Matsushita Electric Works Ltd | 放電灯点灯装置 |
JP2002324688A (ja) * | 2001-04-24 | 2002-11-08 | Matsushita Electric Works Ltd | 放電灯点灯装置、及びこれを用いた照明器具 |
JP2003224981A (ja) * | 2002-01-28 | 2003-08-08 | Matsushita Electric Works Ltd | 放電ランプ点灯装置 |
Non-Patent Citations (1)
Title |
---|
See also references of EP1696547A4 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012028259A (ja) * | 2010-07-27 | 2012-02-09 | Panasonic Electric Works Co Ltd | 放電灯点灯装置および放電灯点灯装置を備える照明器具 |
Also Published As
Publication number | Publication date |
---|---|
US7211970B2 (en) | 2007-05-01 |
US20060097655A1 (en) | 2006-05-11 |
TWI258322B (en) | 2006-07-11 |
TW200524480A (en) | 2005-07-16 |
EP1696547A4 (en) | 2010-01-20 |
JPWO2005060083A1 (ja) | 2007-07-12 |
EP1696547A1 (en) | 2006-08-30 |
KR20060024415A (ko) | 2006-03-16 |
HK1097113A1 (en) | 2007-06-15 |
KR100721631B1 (ko) | 2007-05-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US7211970B2 (en) | Discharge lamp lighting device and lighting unit | |
US7652898B2 (en) | Soft start circuit and power supply including soft start circuit | |
JP3427385B2 (ja) | 力率補正付き高周波数ac/acコンバータ | |
US5923542A (en) | Method and apparatus for driving piezoelectric transformer | |
JP3805927B2 (ja) | 交流電圧調整器 | |
JPH11289778A (ja) | 圧電トランスインバータ | |
JPH0993922A (ja) | 共振型dc−dcコンバータ | |
US7084584B2 (en) | Low frequency inverter fed by a high frequency AC current source | |
KR20030076565A (ko) | 단일-스테이지 pfc + 밸러스트 제어 회로/범용 전력변환기 | |
US6909258B2 (en) | Circuit device for driving an AC electric load | |
JP2003164163A (ja) | 圧電トランス駆動回路 | |
JPH10201248A (ja) | 電源装置 | |
JP2004527896A (ja) | 高効率高力率電子安定器 | |
JP2022130803A (ja) | 誘導加熱装置 | |
US6816394B2 (en) | Approximated sinusoidal waveform inverter | |
WO1992016085A1 (en) | Power supply having high power factor with control that tracks the input alternating supply | |
JP3269460B2 (ja) | 圧電トランス駆動回路及び駆動方法 | |
JP2001086737A (ja) | 電源装置 | |
JP4807022B2 (ja) | 誘導加熱装置 | |
JP2018064380A (ja) | ハーフブリッジ回路を用いた電源装置 | |
JP3230560B2 (ja) | 直流電源装置 | |
JP2007103097A (ja) | 放電灯点灯装置および照明装置 | |
JP3029422B2 (ja) | 電源装置 | |
JP2001068289A (ja) | 放電灯点灯装置 | |
JP2004048853A (ja) | 圧電トランス式直列共振型dc−dcコンバータ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 200480021317.8 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2005516346 Country of ref document: JP |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GM KE LS MW MZ NA SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 11302356 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2004807196 Country of ref document: EP Ref document number: 1020057024056 Country of ref document: KR |
|
WWP | Wipo information: published in national office |
Ref document number: 1020057024056 Country of ref document: KR |
|
WWP | Wipo information: published in national office |
Ref document number: 11302356 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: DE |
|
WWP | Wipo information: published in national office |
Ref document number: 2004807196 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1020057024056 Country of ref document: KR |