JPS58102496A - Device for dimming and firing discharge lamp - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a discharge lamp-light lighting arrangement.

Figure 1 shows the dimmer device of the RC 19E. In the figure, an AC power supply V is connected to an inverter INV via a phase control element such as a triac TAk, and the output of the inverter INV is given to a discharge lamp LA via a wk Takigawa choke coil CHt to generate a % series electric lamp. It is set to light up. As shown in Fig. 882, the phase control element TA can control the energization phase of the AC power supply (2) by changing its ignition phase (kilJ141), and is a zero point that operates to vary the effective fIL of the power applied to the discharge lamp LA. By appropriately changing the arc phase, the discharge lamp LA can be dimmed.

However, in this oak path, even if the rc$i- is fully lit (the phase control element is fully conductive), there is input current distortion from the AC power supply ■ of about 30X.
During dimming as shown in the figure below, a pause period τ occurs, which further increases the distortion. As a result, articulation disturbances due to distortion and wave components occur, and (9) stress is applied to the road components, causing noise. 1
7t, low power factor), and the Kamegen transformer used as an AC power supply vK if! ! Loss caused by IvIjA waves lowers the efficiency of the entire device, which necessitates the use of equipment with a larger capacity than is necessary, resulting in larger and more expensive devices.

Therefore, the power saving in the discharge lamp is reduced by 1% [because the efficiency of the source transformer decreases].

The drawback was that the system as a whole could not achieve energy savings.

The present invention has been proposed in view of the above points VC*.

Using 3-phase AC as a power source, we utilize the property that the power supplied from 3-phase AC is constant regardless of time to create high-frequency power with approximately constant amplitude with low input current distortion. By making the oscillation phase of one of the three inverters fully variable, it is possible to maintain medium and wide dimming while maintaining low input current distortion, eliminating the negative effects of manually operated tIL pots. Discharge lamp dimmer lighting KK direct with efficiency, miniaturization, and low cost? The purpose is to provide 1''.

In accordance with the drawings showing the tIL source device which is the basis of the invention and the embodiment of the present invention, φ0 which details the failure #U is shown in Fig. 3 is the configuration block of the power supply device which is the basis of the invention. This figure was previously proposed by the present applicant in % Gansho Raku-180679. To explain the structure in Fig. 3, there are three inverters I between each terminal of the three-phase power supply I.
N Vt , I N Vt , and I N Vs are connected to each other, and the output terminals of the valley inverters are all folded in series, making the oscillation output voltage 1 tatami. The fourth factor may be due to the voltage waveform in the troughs, or because three-phase AC has the property that the instantaneous total power is constant regardless of time, the oscillation of each inverter is synchronized, and one In the same phase]1
By folding the output voltage, it is possible to obtain a frequency voltage φ5 whose amplitude is substantially constant.

FIG. 5 is a concrete schematic diagram showing one embodiment 4PA of the present invention, and FIG. 6 is its driving (b) path. To explain the constituent sounds in FIG. 5, the component W of the three-phase power supply 1.

U is connected to the AC input terminal of rectifier DB.

'1! The positive output terminal of the current transformer DB is an inductor, and a slight Vpc explosion occurs at the midpoint of the primary winding of the oscillation transformer T, and F6m at the edge of this primary winding is connected to the transistor Q1 as a switching element. The above-mentioned fft cooperative DB via Qt' respectively.
, is connected to the negative output terminal of I5c. In addition, an oscillation capacitor C8 is connected in parallel to both ends of the transformer T and the first winding. Together with the transistors QI and Q, an inverter INV is configured. Similarly, the other terminals U-V and WK of the three-phase power supply 1 are connected to the inverter lNVt.
, INV, #i Wc n, 41! The secondary windings 1Iiil of the transformer, which are the outputs of the r ear bar p, are connected in series with each other and connected to both ends of the discharge lamp LA. Note that the inverters INV* and INVan have the same configuration as the inverter INV, and the only difference is the signal from the drive N path applied to the transistor.

Next is Kaku in Figure 6! About the configuration and functions of the IIIlIIg circuit WI? , 1j14. The drive VJ circuit is mainly composed of an unstable multi-by-break as an oscillator, an M ground (b) path, and a single rectangular Mar-na biflator, and the signals that drive the inverters lNV+ and lNVt are from the astable multi-by break to the inverter INV. ,'i
The alluring signals come from the multi-vibrator of the female leader. In Figure 6, E is Kaku II! The line t- to which both terminals are connected in the future is
*We will call them source (line) and earth (line).

Therefore, the series path of the resistor Rat transistor Q8 and the series (2) path of the resistor R, transistor Q, are connected between the power supply and the ground. Connected to the wire line via the capacitor QsCsk via the pair 10]-j
nl [the output terminal of the non-stable multivibrator, which constitutes the constant multivibrator, that is, the transistor Q
A transistor Qq=Q(+) whose emitters are connected to the collectors of s and Q- is connected through resistors KRt and Rs, respectively, and a primary transformer T4 is connected between the collector of the transistor and the power supply line. A transformer T is connected between the collector of the transistor Q and the power supply line.
The edges of the primary windings are connected, and in parallel with these primary windings, a series circuit of a resistor kL + 1 capacitor C4 and a series circuit of a resistor R6 and a capacitor Cv are connected, respectively, and a transformer is connected in parallel. , T, are connected to #! through resistors, respectively. Inverter INV shown with the same symbol in Figure 5
+ - INV is connected to the base emitter of the transistor in the snow as a control signal. −10,000, one side output terminal of the astable multivibrator, that is, transistor Q
, is grounded through a variable resistor R1 and a capacitor CI1 in series.

tIJ variable resistance R? , the connection point of the capacitor C4 is connected to the base of the transistor Q□ whose emitter is grounded via the Zener diode ZDTh, and the connection point of the transistor Qo
A resistor R1° is connected between the base and ground of the transistor Qu, and a resistor R1 is connected between the collector and the power supply line, and a capacitor C6, a differential path formed by a resistor KRn, and a diode D are connected to the collector of the transistor Qu in series. Transistors IQ, which constitute a monostable multivibrator, are connected to the 4(1) base. The monostable multivibrator is the same as the non-stable multivibrator mentioned above! This configuration has a resistor R1 between the power supply and ground.

The series circuit of transistor Q+a, the resistor RIM, and the direct circuit of transistor QI4 are connected in parallel to each other,
The base of the transistor Qu is connected to the power supply line via the resistor R1, and the collector of the opposing transistor QI4 is connected via the VC capacitor C1°, and the base of the transistor Q,a is connected to the collector of the transistor Qs via the resistor Rtst. It is connected to the. Then, the collector of the transistor Q1a t Q14 is connected to the emitter t-grounded transistor Ql! e Resistor R at the base of Qs
I4-Rnt' are connected through each transistor Q.
Between the +t collector and the 5-in is the primary 4 of the transformer T! The thin line is the connection between the collector of transistor Q4 and the power supply line, RCA transformer T? The primary windings of (97 - are connected to each other, and the secondary windings of transformer Ta and Tq are connected to resistors R and T, respectively.
R.I. The inverter NV, which includes all valves and is indicated by the symbol 4 in FIG. 5, is made into a transistor.

It is connected to the base emitter of Q.

Next, to explain the operation 'fr, path 1 of the main structure in FIG. 6 is a transistor at the beginning of the oscillation path (unstable multivibrator) consisting of transistors Qa and Qe. 7. Q. The transistor body IE of the inverter INV'l-INVI including the oscillation transformer T, , T, t- is turned on and off alternately.
II (Creating No. 1. - 10,000 transistors.
The output of is led to a delay circuit consisting of a variable resistor R1, a capacitor C11, a Zener diode ZD, and a transistor QIIj, and a positive trigger signal is generated by a differential path of a capacitor cs f and a resistor Rn. (J+s + Q+a is input to the base of the transistor Q4 of the monostable multivibrator, which operates the monostable multivibrator. The output of the monostable multivibrator is the transistor QIt, Q+s'
An inverter INV including an oscillation transformer Ts t- which turns on and off.

The transistors are assembled together. By the way, the resistance R9 is D
Since there is a low resistance, 3 impa fi Is with a resistance value of 0
N v+ , I NV* - I NVB (The D output voltage phase becomes the same phase, and as the number of resistors ftL 'fr increases, the signal to tri-input the monostable multi will come out later than when the resistance value is 0, A phase difference will occur between the output of the single oscillation circuit and the output of the monostable multi-channel, and this phase difference will become wider.Therefore, the phase that turns on and off the transistors of the oscillation transformer T and the inverter INV, rt. ,
It lags behind the other two units, causing a phase difference in the output voltage.

Next, we will explain the operation when all the lights are on and when the light is on. First, for full lighting, the resistance Rv of the braid-path is set to 0. In this state, the output voltage phases of the oscillation transformers of each inverter are all the same, so by superimposing these in series, a high frequency voltage with a substantially constant voltage can be provided, and the discharge lamp LA1r can be lit. -10,000% Figure 7 shows the waveforms of each part when the # source is lit. The output of the inverter provided corresponding to x + y, z is shown, (c) is the voltage that is combined in series and applied to the discharge lamp, ■ is the voltage during dimming, and I is the voltage when the lamp is fully lit for comparison. The voltage wave is 0.

When performing dimming lighting, use variable resistor R? 'lt By setting an excessive value, △t Wc in Fig. 7 (b)
The output voltage phase of the oscillation transformer T1 can be delayed by the time indicated by . In this state, when the output voltage of the valley inverter is superimposed, the reduced voltage of the Nabi Baked Noodles is applied to the discharge lamp when the lamp is fully lit, as shown by point -■ in (c). Since the degree of reduction of the peak plane can be arbitrarily varied by the variable resistor Rq, the discharge lamp LA can emit continuous rcn light by operating the variable resistor Rq. By lighting in this manner, there is no rest period in the input current from the three-phase alternating current, and therefore input current distortion can be kept small. In addition, in the above, 3
Although the explanation was limited to the symmetrical AC, it is unlikely that exactly the same behavior can be expected in the case of symmetrical AC.

Another application example is shown in FIG. 8, and by replacing the block in FIG. 6 (4), it is possible to control the external light 'gt'@911k of the discharge lamp at a constant level.

External light is detected by a phototransistor, and the resistance value of transistor Q1G is controlled to control the oscillation transformer T1.
change the output phase. Note that the diode D' and the resistive island 7 are the capacitor C1! This is for discharging the electric charge.

As described above, the present invention has three-phase 11! an inverter that converts each phase and each inter-wave power of the source into high-frequency power having a wave number p and the same frequency as that of the three-phase power source, and a control unit that synchronizes the firing period of the inverter, The firing waveform of each inverter is synchronized so that it crosses zero at the same timing, and the phase difference of each phase or each 1 mm square force is 0.
In addition, in the discharge lamp lighting device for lighting a discharge lamp, the frequency power is obtained by converting the high frequency power to 180 degree high frequency power and superimposing each high frequency power in series with the same phase to obtain the frequency power because the amplitude is approximately -1. Any one of the three inverters
By simply cutting the Ikt field power phase of the table.

I'm going to use the hook to supply the power to the discharge lamp.') Since I made a VC,
It is possible to reduce the input voltage TLT, reduce noise and acoustic disturbances by reducing distortion, reduce loss in the power transformer, and improve efficiency as a whole system. The advantage is that it is easy to use electricity, and because equipment can be installed to a minimum, it can be made smaller and lower in cost.

[Brief explanation of the drawing]

Figure 1 is a conventional light control system wt, Figure 2 is a clear view of its operation,
Fig. 3 is a configuration diagram of the power supply device that is the basis of the present invention, and Fig. 4
5 is a circuit diagram showing one embodiment of the invention, FIG. 6 is a line diagram showing one drive path used in the embodiment of FIG. 5, and FIG. 7 is an explanation of its operation. Figure, 8th! i! J
is a partial (2) schematic diagram showing other application examples O I N V'+ , I N Vt , I NVs...
...Inverter, l...Three-phase father flow, DB,...
DB Snow, DB, ... Rectifier, Q, ~Qti・
...transistor, LA- ...discharge lamp, T
I~T,...Transformer, D...Diode, ZD...Zener diode, C1~C
1!・・・・・・Capacitor, R1~R2r・・・・・・
Resistance s Ll~L,... Inductor %E...
・-・Direct TLT power supply % permission - person Matsushita Electric Works Co., Ltd.

Claims (1)

[Claims] an inverter that converts each phase or each line power of the three-phase power supply to the frequency of the three-phase power supply V*< and the same frequency 1Ilhji11 wave force rc; The oscillation waveforms of each inverter are synchronized so that they cross zero at the same timing, and each phase or each bundled power group is converted into high-frequency power with a phase difference of 0 or 180 degrees, and the harmonic power for each is made to be the same. By superimposing the phase in series, the amplitude is ~-, so the frequency power control can be obtained.
In the phantom lighting device that lights up the discharge lamp, the power given to the discharge lamp is adjusted according to the oscillation output phase of any one of the three inverters, which is the t-W characteristic. Discharge lamp - light lighting device.