KR20030012426A - High voltage occurrence apparatus using SCR - Google Patents

Abstract

PURPOSE: An apparatus for generating a high voltage by using SCR(Silicon Controlled Rectifier) is provided to miniaturize a high voltage generator by removing an intermediate tap from a stabilizer, separating the stabilizer from the high voltage generator, and using a high voltage transformer. CONSTITUTION: The electric power is inputted into or outputted from a stabilizer(L2). An output voltage of the stabilizer(L2) is applied to a diode(D1) and a plurality of resistors(R1,R2). An RF(Radio Frequency) transformer is used for triggering the output voltage of the stabilizer(L2) to a gate of a capacitor(Q1) and applying charging current to a condenser(C2). The current and the high voltage are applied to the first side and the second side of the RF transformer, respectively. A high voltage discharge lamp is turned on or off according to the voltage applied to the second side of the RF transformer. A pulse is not generated from the second coil since the gate of the capacitor(Q1) is not triggered by the diode(D1) when the condenser(C2) is fully charged.

Description

High voltage occurrence apparatus using SCR}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an igniter for a high pressure lamp, and more particularly, to a high pressure generator for lighting a high pressure discharge lamp such as a sodium lamp or a metal halide lamp.

In general, the high-pressure generator using the center tap of the ballast has a problem that the ballast uses a general low-frequency iron core, so that a high-voltage pulse of rapid rise is largely lost and the loss is radiated to the surroundings and affects the surrounding electronic products. .

In addition, since the distance between the ballast and the lamp should be as close as possible, since most high-pressure lamps are generally installed at a high place for lighting, there are many difficulties in installing various ballasts.

Moreover, the high pressure generator using the middle tab of the ballast must be housed in one case together with the ballast, and the ballast generates considerable high heat, so that the pulse generating electronic parts frequently fail due to deterioration.

And, as shown in Figure 1 by setting the middle tap on the transformer (L2) of the ballast to generate a high pressure with a lighting auxiliary device (or high-pressure generator, igniter), so the distance between the ballast and the lamp is far away or bent in the wiring If the lamp is severe, it may fail to turn on because of high loss of high voltage pulse due to the impedance of the wire.

In addition, a voltage phase angle at which the gate of the SCR is triggered is generated by voltage division of the resistors R1 and R2.

In addition, the conventional product has a center tap on the ballast coil to generate a high pressure in the ballast itself, so if the distance from the lamp is far away, the high pressure loss is large, there is a problem that does not normally turn on or adversely affect the peripheral electronic equipment due to electromagnetic interference.

Accordingly, the present invention has been made to solve the above problems, and the object of the present invention is to miniaturize the high pressure generator by using a high pressure transformer after removing the intermediate tab from the ballast and separating the high pressure generator from the ballast.

1 is a ballast connected to a conventional lighting auxiliary device.

Figure 2 is a circuit diagram of a high pressure generator using an SCR applied to the present invention.

Figure 3 is a high pressure waveform generated by the SCR applied to the present invention.

<Description of Major Symbols in Drawing>

10: lighting auxiliary device (or high pressure generator, igniter)

12: high frequency transformer 20: ballast

30: lamp

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

High pressure generator using the SCR applied to the present invention,

Ballast (L2) which inputs / outputs power supply,

The output voltage of the ballast (L2) triggers the gate of the capacitor (Q1) through the diode (D1) and resistors (R1, R2) to flow a charging current to the capacitor (C2) to flow a current to the primary side of the transformer and the secondary side High frequency transformer to induce high pressure to

And a high voltage discharge lamp in which the voltage induced on the secondary side of the high frequency transformer is supplied to both terminals and turned on.

When the capacitor C2 is fully charged, the gate of the capacitor Q1 is not triggered by the diode D1, and no pulse is generated in the secondary coil. In addition, the generation of high pressure is stopped when the high-voltage discharge lamp is turned on.

2 is a circuit diagram of a high-voltage generator using the SCR applied to the present invention, the circuit operation thereof will be described as follows.

Power is input through the ballast (L2). In addition, since the lamp is not lit, the ballast output voltage is the same as the ballast input voltage.

The ballast output voltage causes the gate of the capacitor Q1 to be triggered near the peak value of the input voltage by the voltage dividing resistors R1 and R2 through the diode D1.

When the gate of the capacitor Q1 is triggered, the capacitor C2 flows the charging current instantaneously and flows the current to the primary side of the high frequency transformer, and at that moment, the high pressure is induced on the secondary side, and the high pressure induced on the secondary side is applied to both terminals of the high voltage discharge lamp. Supplied.

When the capacitor C2 is fully charged, the charging current is stopped and the incoming sine wave falls back to the zero cross point and then rises in the reverse direction. At this time, the charged charge of the capacitor C2 is reversed by the diode D2, but since the gate of the capacitor Q1 is not triggered by the diode D1, no pulse occurs in the secondary coil.

When the voltage waveform comes in the forward direction of the capacitor Q1 and the diode D1 again, the process is repeated from the power input through the ballast (L2) to the process of rising in the reverse direction.

When the high-voltage discharge lamp is turned on, the voltage on the output side of the ballast L2 is drastically reduced and the voltage generated by the voltage dividing resistors R1 and R2 does not reach the voltage for triggering the gate of the capacitor Q1.

Capacitor C1 should act as a buffer when capacitor C2 suddenly flows the charging current, so more than twice the capacity of capacitor C2 is set to capacity.

In the case of SCR (Silicon Controlled Rectifier), on the contrary, the high voltage is not generated by blocking or bypassing the current by the diodes D2 and D1.

As shown in FIG. 3, the SCR gate is triggered at the waveform portion protruding from the upper end of the waveform to generate a high voltage, and the magnitude of the high voltage pulse is about 2 to 4 KV.

As described above, the present invention takes the form of removing the intermediate tab from the ballast and separating the lighting auxiliary device (or the high pressure generator or igniter) from the ballast, and instead of removing the high pressure from the ballast and using a small and light high voltage transformer. To make the high-pressure generator itself small.

Therefore, the ballast does not need a lighting auxiliary device and does not need an intermediate tap, and since the internal structure of the ballast product contains only the power factor improving capacitor C1 and the ballast L1, the manufacturing of the ballast is simplified.

In addition, since the high-pressure generator (igniter) applied to the present invention is very small and can be installed in close contact with the high-pressure discharge lamp, the ballast may be installed far away from the bottom for easy maintenance and maintenance.

As described above, the present invention generates a high pressure by using a high frequency transformer, so the size is significantly reduced, so that it is compact and lightweight, and can be assembled into a package with a lamp, and it is very easy to install even if it is far from the ballast.

Claims (3)

Ballast (L2) which inputs / outputs power supply, The output voltage of the ballast (L2) triggers the gate of the capacitor (Q1) through the diode (D1) and resistors (R1, R2) to flow a charging current to the capacitor (C2) to flow a current to the primary side of the transformer and the secondary side High frequency transformer to induce high pressure to A high voltage generator using an SCR, characterized in that it comprises a high-voltage discharge lamp which is supplied to both terminals of the induced voltage on the secondary side of the high-frequency transformer. The method of claim 1, wherein when the capacitor (C2) is fully charged, High voltage generator using SCR characterized in that the gate of the capacitor (Q1) is not triggered by the diode (D1), the pulse does not occur in the secondary coil. The high pressure generator using the SCR according to claim 1, wherein the high pressure generation is stopped when the high pressure discharge lamp is turned on.