KR200360277Y1 - Electronic ballast of lamp having a glowstarter - Google Patents

Abstract

The present invention relates to an electronic ballast of a lamp provided with a lighting tube, and the voltage stabilizer 10 for stabilizing by receiving a commercial AC power supply, and rectified by receiving AC power from the voltage stabilizing unit 10 to convert to DC power The oscillation and starter 30 and the lighting tube 41, which are supplied with a DC power output from the rectification and smoother 20, oscillate at a given resonance frequency, and turn on a lamp. It includes a 2-pin lamp that can be attached to the lamp unit 40 which is lit by the oscillation and start-up unit 30, the oscillation and start-up unit 30, one side to the rectification and smoothing unit 20 The direct current is directly transmitted to the lamp unit 40 through the starting resistor R7 receiving the DC starting power connected thereto, so that the starting power is turned on in the lamp unit 40 when the lamp is normally inserted. Heating at 41 It is transmitted to the oscillation and start unit 30 along the attached bimetal electrode, and in the non-lamp state, the lamp unit 40 is immediately disconnected so that the starting power is not transmitted to the oscillation and start unit 30 so that the lamp starts. Characterized in that not to be made.

Description

Electronic ballast of lamp with lighting tube {ELECTRONIC BALLAST OF LAMP HAVING A GLOWSTARTER}

The present invention relates to an electronic ballast of a lamp having a light tube, and more particularly, when the conventional electronic ballast is used for a 2-pin lamp having a light tube, the ballast continuously operates even in the absence of the lamp to waste power. The present invention relates to an electronic ballast of a lamp having a lighting tube which can improve the problem and at the same time enable the use of a 2-pin lamp and block unnecessary starting operation of the ballast in the absence of the lamp.

Electronic ballast converts the power of general commercial power supply (50 ~ 60㎐) into high frequency (20㎑ ~ 50㎑) and turns on the lamp by increasing the power efficiency.The most characteristic concept of electronic ballast is AC commercial Although it is difficult to reduce the size and weight of a power supply such as a magnetic ballast at the frequency of the power supply, rectifying the power supply to DC and converting the rectified DC voltage to a high frequency AC voltage using an oscillation circuit again include the inverter circuit configuration. will be.

The structure of this conventional electronic ballast is known in FIG.

Referring briefly to the operation of the conventional electronic ballast circuit with reference to Figure 1, the commercial AC power is input from the power supply terminals (BK, WH) and the varistor (VA) and overvoltage The low pass filter LF and the ripple elimination capacitors C1-C3 are continuously connected to the fuse F1 that blocks the AC voltage from being applied, and the voltage stabilizing part 1 for stabilizing the voltage of the applied AC power supply; Smoothing for the smoothing of the voltage rectified from the bridge diode (D1-D4) and the bridge diode (D1-D4) connected to the other side of the voltage stabilization unit (1) to convert the commercial AC voltage into a DC voltage Oscillation which is alternately switched by switching transistors Q1 and Q2 by receiving the rectified and smoothed part 2 composed of the capacitor C4 and the power converted into DC power through the rectified and smoothed part 2.It consists of a start-up unit 3, such the switching element in the binder lamp in the lamp unit (4) by a high-speed switching operation (Q1, Q2) that is driven.

At this time, the starting power in the oscillation and the starter (3) is a direct current through the rectifying and smoothing unit (2) is charged to the start voltage charging capacitor (C10) through the start resistor (R1), When the elapsed time, the diaak D15 is turned on and the second switching element Q2 is turned on, so that the corresponding driving power is applied to the lamp unit 4. Here, the current control resistor R2 is connected to the gate terminal of the first switching element Q1 to limit the current flowing to the gate terminal, and the secondary switching transformer is connected between the source terminal and the gate terminal of the first switching element Q1. The winding OSC-2, the eleventh diode D11, and the twelfth zener diode D12 are connected in parallel with each other.

Similarly, a current control resistor R3 is connected to the gate end of the second switching element Q2 to limit the current flowing to the gate end, and a secondary switching transformer is provided between the source end and the gate end of the second switching element Q2. The winding OSC-3, the thirteenth diode D13, and the fourteenth zener diode D14 are connected in parallel with each other.

In this case, an eleventh capacitor C11, a sixth resistor R6, and a tenth connected between the gate terminal and the source terminal of the second switching element Q2 are connected to the gate terminal of the thyristor Q3 and the corresponding thyristor Q3. A protection circuit comprising a diode D10, a fifth resistor R5, and a fourth resistor R4 is provided to detect an overvoltage from the lamp unit 4 to cut off the power supply. Such switching stages and protection circuits are well known to those of ordinary skill in the art, and thus detailed descriptions thereof will be omitted.

In this conventional electronic ballast, the starting power for driving the lamp is converted into DC power through the voltage stabilizing unit 1 and the rectifying and smoothing unit 2, and then the starting voltage charging capacitor through the starting resistor R1. When the C10 is charged and the predetermined amount or more is charged, the diaak D15 is turned on so that the corresponding starting power is supplied to the lamp unit 4 through the switching element Q2, so that the lamp of the lamp unit 4 is turned on. Started up.

The state in which the 4-pin lamp is attached to this conventional electronic ballast used for the 4-pin lamp is shown in FIG.

In the electronic ballast of the conventional method in which the 4-pin lamp is attached as described above, in the absence of the lamp, that is, when the lamp is not attached, the lamp unit 4 side is actually disconnected, and starting power is no longer supplied to the corresponding lamp unit 4 side. There was no problem.

However, as shown in FIG. 3, when the conventional electronic ballast employs a 2-pin lamp with a discharge tube built therein, the starting power is continuously introduced into the circuit through the capacitor C9 even when the lamp is not attached. As it is supplied, a risk that may adversely affect other components of the ballast may occur, and there is a problem in that unnecessary power consumption is continuously generated in the actual ballast.

The present invention was devised to solve the above problems, the purpose of which can be used by adopting a low-cost two-pin lamp directly while the stable ballast by blocking the supply of the lamp unit of improper starting power even in the absence of the lamp It is to provide an electronic ballast of a lamp having a lighting tube which can be operated.

1 is a circuit diagram showing an electronic ballast for a lamp according to the prior art.

2 is a circuit diagram showing a lamp unit of an electronic ballast in which a 4-pin lamp is attached.

3 is a circuit diagram showing a lamp unit of an electronic ballast in which a two-pin lamp is attached.

4 is a circuit diagram showing an electronic ballast of a lamp having a lighting tube according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: voltage stabilizer 20: rectification and smoothing

30: oscillation and starting unit 40: lamp unit

41: lighting tube

The electronic ballast of the lamp having a lighting tube according to one aspect of the present invention for achieving the above object, the voltage stabilizer 10 for stabilizing by receiving a commercial AC power supply, and the AC power supply from the voltage stabilizer 10 Rectification and smoothing unit 20 is applied to rectify and convert to a DC power supply, and the oscillation and starting unit 30 is supplied to the DC power output from the rectifying and smoothing unit 20 to oscillate at a given resonance frequency to turn on the lamp (30) And a 2-pin lamp having a light tube 41, the lamp unit 40 being lit by the oscillation and starting unit 30, wherein the oscillation and starting unit 30 is the rectification. And directly transmitting the corresponding DC starting power to the lamp unit 40 through a starting resistor R7 receiving one side of the smoothing unit 20 and receiving the DC starting power inputted therein, so that the starting power is normally inserted into the lamp unit 40. The ram It is transmitted to the oscillation and starting unit 30 along the bimetal electrode that is heated and attached to the lighting tube 41 of the unit 40, and in the non-lamp state, the corresponding lamp unit 40 is immediately disconnected so that the starting power is started and started. It is characterized in that it is configured so that the lamp is not started to be delivered to (30).

Preferably, the oscillation and starting unit 30 is inserted into the divided resistor R9 is connected to one side of the lamp unit 40, the starting power from the lamp unit 40 through the divided resistor (R9) When the startup power charging capacitor C10 is charged with DC power and the diaak D15 conducts after a predetermined time, the startup power is applied to the lamp unit 40 through the switching element Q2. .

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

4 is a circuit diagram illustrating an electronic ballast of a lamp having a lighting tube according to an embodiment of the present invention.

Referring to Figure 4, the electronic ballast of the lamp having a lighting tube according to an embodiment of the present invention, the voltage stabilizer 10 for receiving and stabilizing a commercial AC power, the AC power from the voltage stabilizer 10 Rectification and smoothing unit 20 to receive and rectify it to convert to a DC power source, the oscillation and starting unit 30 to light the lamp of the lamp unit 40 by receiving the DC power output from the rectifying and smoothing unit 20 It includes, the overall operation configuration is the same as the conventional electronic ballast shown in FIG.

The voltage stabilizing unit 10 is a varistor (VA) for removing the abnormal voltage generated from the power input through the power supply terminals (BK, WH) of the one side to which the commercial AC power is input, and the AC voltage of the overvoltage is applied The fuse F1 to cut off, the low pass filter LF and the ripple removing capacitors C1 to C3 are stabilized to stabilize the voltage of the applied AC power.

The rectifying and smoothing unit 20 is a bridge diode (D1-D4) and the bridge diode (D1-D4) connected to the other side of the voltage stabilization unit 10 for converting the commercial AC voltage into the DC voltage A smoothing capacitor (C4) responsible for smoothing the voltage rectified from the DC power source is stably DC.

The oscillation and start-up unit 30 is to turn on the lamp bound to the lamp unit 40 by the DC power drawn through the rectifying and smoothing unit 20, the square wave (120Hz) to the lamp unit 40 The internal switching elements Q1 and Q2 operate alternately with a DC power source supplied to supply the light, thereby lighting the lamp of the corresponding lamp unit 40 with the output power of the AC phase.

The starting operation of the ballast when the lamp is normally attached to the lamp unit 40 will be described below.

The initial starting power for starting the lamp of the corresponding lamp unit 40 in the oscillation and starting unit 30 is first DC through the rectifying and smoothing unit 20, and then first through the starting resistor R7. 40).

At this time, the starting resistor (R7) is connected to the anode side of the ninth diode (D9) in the conventional ballast so that the initial starting power is arranged to be charged directly to the starting power charging capacitor (C10), in the present invention the starting By connecting the resistor R7 to the cathode side of the ninth diode D9, the initial starting power is preferentially delivered to the lamp unit 40.

At this time, the lamp unit 40 is provided with a lighting tube 41, the bimetal movable electrode provided in the interior of the lighting tube 41 is the heating of the lighting tube 41 when the direct start power is supplied as described above As a result it is instantaneously attached to the internal fixed electrode. Accordingly, since the corresponding lighting tube 41 is electrically shorted, the corresponding starting power is transferred to the eighth capacitor C8 to be charged, and the starting power charged to the eighth capacitor C8 is along the voltage divider R9. In the state charged in the starting voltage charging capacitor (C10), when the charge is more than a predetermined value, the diaak (D15) is conducted and the corresponding starting power is supplied to the lamp unit 40 through the switching transistor (Q2), the lamp unit The lamp of 40 is to be started.

However, the starting operation of the ballast when the lamp is not attached to the lamp unit 40 will be described below.

The initial starting power for starting the lamp of the corresponding lamp unit 40 in the oscillation and starting unit 30 is first DC through the rectifying and smoothing unit 20, and then first through the starting resistor R7. 40, which is a lamp member in which the lamp unit 40 is not attached, the lamp unit 40 does not exist in the lamp unit 40, and thus the actual lamp unit 40 is opened and started. Power no longer passes into the ballast.

That is, when a 2-pin lamp is attached to a conventional electronic ballast as it is, the DC-powered starting power is directly charged into the charging capacitor C10 instead of being directly introduced into the lamp unit 40, and then the lamp is switched through the switching element. While being drawn to the unit 40, even when the lamp is not attached, the ninth capacitor C9 continuously transmits the starting power into the ballast circuit, causing the circuit to operate in an abnormal state and causing unnecessary power consumption. When the 2-pin lamp is attached to the electronic ballast according to the present invention, the lamp unit 40 is opened when the lamp is not attached because the starting power is first applied to the lamp unit 40 as a DC power source. The state is maintained so that no more starting power can be introduced into the circuit.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those having ordinary knowledge in the technical field to which the present invention belongs, and the above-described embodiments and accompanying It is not limited to the drawing.

As described above, the electronic ballast of the lamp with a light tube shown in the present invention improves the problem that the ballast is continuously wasted in the absence of the lamp when using the conventional electronic ballast for the 2-pin lamp In addition, it is possible to adopt and use a 2-pin lamp, and in the absence of the lamp part, it is possible to cut off unnecessary starting operation of the ballast in advance, thereby preventing damage to the ballast circuit due to unnecessary start-up power supply and preventing power consumption. There is.

Claims (2)

Voltage stabilization unit 10 for receiving and stabilizing a commercial AC power supply, rectification and smoothing unit 20 for rectifying and converting to DC power by receiving AC power from the voltage stabilization unit 10, and the rectification and smoothing unit The oscillation and starting unit 30, which is supplied with a DC power output from the 20, and oscillates at a given resonance frequency to light a lamp, and a 2-pin lamp having a lighting tube 41 can be attached to the oscillation and starting unit ( It comprises a lamp unit 40 that is lit by 30, The oscillation and starting unit 30 directly connects the corresponding DC starting power to the lamp unit 40 through a starting resistor R7 for receiving a DC starting power connected to one side of the rectifying and smoothing unit 20. When the lamp is normally inserted, the starting power is transmitted to the oscillation and starting unit 30 along the bimetal electrode which is heated and heated in the lighting tube 41 of the lamp unit 40, and in the non-lamp state, the corresponding lamp unit Electronic ballast of the lamp with a light tube, characterized in that 40 is cut off immediately so that the starting power is not transmitted to the oscillation and start unit 30 so that the lamp is not started. The method of claim 1, The oscillation and starting unit 30 has a divided resistor R9 connected to one side of the lamp unit 40 and a starting power supplied from the lamp unit 40 through the divided resistor R9. When the charging capacitor C10 is charged with DC power and the diaak D15 is conducted after a predetermined time has elapsed, the starting power is applied to the lamp unit 40 through the switching element Q2. Electronic ballast of the lamp.