KR200179879Y1 - Series type ignitor for high-intensity discharge lamp - Google Patents

Abstract

(Name of design) Series type igniter of ballast for high-pressure discharge lamp

(Purpose) In addition to the choke transformer of the ballast for high-pressure discharge lamps, the purpose of the present invention is to provide a ballast for high-pressure discharge lamps that is safely and easily turned on by installing a pulse transformer with a die solution, a booster coil, and a capacitor in the high voltage pulse generator.

(Configuration) The choke transformer comprises a high voltage pulse generator 1, a voltage stabilizer 2, an oscillation and initialization unit 3, a main control part and a time setting part 4, and a pulse generating interruption part 5 connected to the choke transformer. In the ballast for a high-pressure discharge lamp, a separate pulse transformer (T1), a booster coil (L1), and a die solution (Q1) are provided in the high-pressure generator unit 1 without using the intermediate tap potential of the CHOKE transformer. To the capacitor (C1) and resistor (R1) and install and connect the charge-discharge capacitor (C2) in parallel with the pulse transformer to configure the diluent (Q1) by the charge and discharge voltage of the capacitor (C2) conducting the pulse transformer A high pulse voltage is induced on the secondary side of T1, and the lamp is started by this voltage. In addition, since the high voltage pulse is generated by the pulse transformer, there is no high voltage pulse in the winding of the choke transformer, so that the choke transformer can be turned on safely and easily without any risk of interlayer breakdown of the choke transformer.

Description

SERIES TYPE IGNITOR FOR HIGH-INTENSITY DISCHARGE LAMP}

The present invention relates to a series type igniter of a ballast for a high-pressure discharge lamp.

More specifically, the present invention is a patent application 99-43730 is related to the igniter combined with the timer of the high-pressure discharge ballast, the focus is on the improvement of the circuit of the high-pressure pulse generator, the middle of the choke transformer in the ballast for high-pressure discharge lamp The high voltage pulse is generated on the secondary side of the pulse transformer as the die liquid is instantaneously connected by the charge / discharge voltage of the condenser. Thus, the lamp is more easily lit by the high pressure pulse.

Ballasts for high-pressure discharge lamps are installed between the power supply and the lamps to provide adequately controlled current to the lamps. It consists of three parts: Choke Trans, Power Factor Correction Capacitor, and Ignitor. Improves starting and primary power factor of lamp to high power factor to maintain stable lighting.

In particular, the igniter is a lighting aid that plays a very important role in the configuration of the ballast, such as restarting the lamp as well as restarting the lamp. The high-pressure sodium and metal halide lamps in the HID Lamp cannot start the lamp only by the secondary voltage (no load voltage) supplied from the ballast due to the high vapor pressure in the arc tube. To apply a high voltage (800-4kv) with a very short pulse width, the lamp can be turned on smoothly, and an igniter for generating this pulse is necessary.

The patent application No. 99-43730, the igniter combined with the timer of the ballast for the high-pressure discharge lamp is a semi-parallel (Semi) that generates a high-pressure pulse using the tap potential of the choke transformer as shown in FIG. -Parallel method is adopted.

That is, in FIG. 1, when an AC voltage is applied to the power terminals Ph and N of the choke trans to which the high voltage discharge lamp HIDLamp is connected, the voltage is supplied to the waveform shown in FIG. The lamp does not start up. At this time, a bidirectional switching element (TRIAC) connected to the capacitor (C) to the tap on the choke transformer (CT) winding of the ballast is fired by a not shown triggerer circuit. Therefore, while the bidirectional switching element switches the tap potential controlled appropriately by the capacitor (c) to induce the counter electromotive force of the choke coil, a pulse voltage of 800v-4kv is applied to one waveform as shown in b of FIG. 2 on the secondary side of the choke transformer. The lamp is started by the high pressure pulse.

However, this method is a circuit method in which the choke transformer plays a dual role of generating the high voltage pulses necessary for lamp current control and lamp starting. Therefore, when the igniter is operated, the high voltage pulses exist on the choke transformer windings. Defect factors due to breakdown are always inherent, and since the control of the pulse waveform is difficult, there is a problem that the lamp starts unstable due to the irregular waveform as shown in FIG. 2.

The purpose of the present invention is to provide a high voltage discharge lamp which is more easily lit by adopting a series circuit method generated in the igniter itself, in addition to the choke transformer with a unique function of controlling only the lamp current. It is to provide an igniter for ballasts for lamps.

Another object of the present invention is to generate a high pressure pulse by a pulse transformer installed separately from the choke coil of the ballast for a high pressure discharge lamp, so that there is no high pressure pulse on the choke transformer winding during the operation of the igniter, so that the insulation of the winding is caused by the high pressure pulse. It is to provide an igniter of a ballast for a high-pressure discharge lamp with no risk of destruction.

The present invention, in order to achieve the above object, in the ballast for the high-pressure discharge lamp, without using the tap power supply of the choke transformer, connecting a separate pulse transformer, booster coil and die solution together with the capacitor and The liquid connects and configures the charge / discharge capacitor for the trigger in parallel with the die solution.

When power is supplied to this high-voltage discharge circuit, the conduction voltage of the die solution is rapidly charged and then discharged and the high pulse voltage is induced on the secondary side of the pulse transformer by the repetition of charge / discharge operation. The lamp is started and turned on by this high pressure pulse.

In addition, the conventional choke transformer has a role of controlling the lamp current and generating a high pressure pulse required for starting the lamp. It is easily turned on and there is no high voltage pulse on the winding of the choke transformer during operation of the igniter. Therefore, there is no fear of insulation breakdown between the winding layers due to the high voltage pulse, and it is designed to be used more safely and conveniently.

1 is a circuit diagram of a conventional ballast

2 is a typical pulse waveform diagram of a conventional ballast

a is a waveform diagram of a supply voltage

b is a waveform diagram of an irregularly controlled secondary pulse voltage

3 is a ballast circuit diagram of the subject innovation

4 is a high-voltage pulse waveform diagram of the present invention

a is the power supply voltage waveform

b is pulse voltage waveform

c is the secondary pulse voltage waveform

[Description of Signs of Important Parts of Drawing]

1: high voltage pulse generator, 2: voltage stabilizer,

3: oscillation and initialization unit, 4: main control unit and time setting unit,

5: pulse generating cut off part, R: resistance,

C: condenser, Q1: diac,

T1: pulse transformer, L1: booster coil.

3 is a circuit diagram of the present invention. In the choke transformer, a high voltage pulse generator 1, a voltage stabilizer 2, an oscillation and initialization unit 3, a main control unit and a time setting unit 4, and a pulse generating block unit 5 ) Is configured to connect the high voltage pulse generator 1 with the high voltage pulse transformer T1 and the booster coil L1 and the die solution Q1 at the primary line side together with the capacitor C1 and the resistor R1. Connect and install the charge / discharge capacitor C2 for the trigger of the die solution Q1 in parallel, and connect the primary side of the pulse transformer T1 to one terminal N of the power supply and the terminal Lp of the lamp circuit. The secondary side of the pulse transformer T1 is connected to the terminal T of the choke transformer and the terminal LP of the lamp circuit, and is separated from the choke transformer by the high voltage pulse induced in the secondary of the pulse transformer. The (HID) lamp is started and turned on.

In the figure, the voltage stabilizing unit 2, the oscillation initial incubating unit 3, the main control unit and the time setting unit 4, and the pulse generating block unit 5 are as shown in the figures, and the patent application 99 of the present applicant Configuration and operation are described in detail in -43730.

According to the present invention, when the AC power is supplied to the power terminals PH and N of the CHOKE TRANS in order to light the HID lamp, the secondary voltage of the choke transformer is shown in FIG. Similarly, the discharge of the lamp has not yet occurred since it is equal to the power supply voltage.

On the other hand, the capacitor C2 is rapidly charged to the sufficient conduction voltage VBO of the die liquid Q1 through the resistor R1 and the capacitor C1. The charge and discharge of the charged capacitor C2 is conducted by conducting the die solution D1 via the primary booster coil L1 of the pulse transformer T1. As a result, as shown in Fig. 4B, the aligned high voltage pulse voltage is induced on the secondary side of the pulse transformer T1, and the lamp is started after this voltage. At this time, the high voltage pulse generated on the secondary side of the pulse transformer has no effect regardless of the choke transformer.

Immediately after the lamp is turned on, the secondary voltage gradually increases to 0 V to the tube's own tube voltage as time passes, but the voltage of the capacitor C2 charged by the secondary voltage (overvoltage) causes the die solution Q1 to become low. Since it is so low that it cannot conduct, eventually, the circuit is opened by the die liquid Q1 and the high pressure pulse generation stops automatically.

On the other hand, while the power is supplied, the voltage stabilization unit 2 is composed of a voltage drop resistor R2, a ripple cancellation capacitor C3 and C4, and a Zener diode D3 for constant voltage. It converts and supplies necessary voltage to the control part of a timer. At the same time, the oscillator and the initialization unit 3 comprising a function of detecting the igniter operation time with the zener diodes D1 and D2, the discharge diode D4, the resistors R3 and R4, and the capacitor C5, and the high frequency oscillation element X1. The oscillator starts at a high frequency and initializes the main control unit and the time setting unit 4 configured to perform programs and main functions set in the semiconductor integrated circuits IC31-IC34, IC41, and IC42 to determine the start of the timer operation.

The main control section and the time setting section 4 are composed of resistors R5-R8 and setting jumper wires (JP1-JP4). The operating time when the setting jumper is not used is 10 minutes, when setting JP1, 12.5 minutes, The igniter operates for 15 minutes when setting JP2, 17.5 minutes when setting JP3, and 20 minutes when setting JP4. When the operation time is terminated by the time setting, the pulse generation blocking unit 5 including the resistors R10 to R13, the bridge diode D5 capacitor C6, and the thyristor Q2 is connected to the pin of the semiconductor integrated circuit IC34. 17), the output is at a high level, and forward current is applied to the gate of the diester Q2, and the anode and the cathode are at the same potential so as to AC-short the bridge diode D5. This bypasses the potential of the charge / discharge capacitor C2 of the high voltage pulse generator 1 through the bridge diode diode D5 so that the high voltage pulse generation is blocked by the timer circuit as shown in FIG.

In the ballast for high-pressure discharge lamps, a separate pulse transformer is installed together with the die solution, the booster coil, and the layer discharge capacitor in the high-pressure pulse generator section without using the tap potential of the choke transformer, so that the high-speed discharge of the die solution by charging and discharging the capacitor is possible. Since the lamp is turned on by the high pressure pulse generated on the secondary side of the pulse transformer by the switching action, the aligned high pressure pulses are continuously generated and the lamp is easily turned on without instability.

In addition, since the choke transformer controls only the lamp current, which is the original purpose, and the starting pulse adopts the series circuit method generated by the igniter itself, there is no fear of interlayer insulation breakdown because there is no high voltage pulse on the winding of the choke transformer during the igniter operation. There is no effect to increase the safety and convenience of the ballast at all.

Others Even if the lamp does not turn on due to any problem, the high-voltage pulse can be automatically cut off after the set time, eliminating the defects in the entire lighting circuit such as electromagnetic interference and sparking between lamp sockets. Can protect.

Claims (1)

The choke transformer of the ballast for a high-pressure discharge lamp has a high-voltage pulse generator (1), a voltage stabilizer (2), an oscillation and initialization unit (3), a main control part and a time setting part (4), and a pulse generating blocker. In connection with (5), the pulse transformer (T1), the booster coil (L1) and the die solution (Q1) are connected together with the capacitor (C1) and the resistor (R1) to the high voltage generator (1) separately from the choke transformer. The secondary side of the pulse transformer T1 is connected to the die liquid charge / discharge capacitor C2 of the die liquid in parallel with the die liquid Q1 to switch the die liquid Q1 by the charge / discharge voltage of the capacitor C2. A series type igniter of a ballast for a high-pressure discharge lamp, characterized in that the lamp is configured to be turned on by the high-pressure pulse induced in the.