KR20000037961A - Three wave inverter compact lamp for dc - Google Patents

Abstract

PURPOSE: A three wave inverter compact lamp for a DC is provided to prevent heat loss by minimizing the switching loss of a transistor during the switching of a high frequency. CONSTITUTION: A half-wave rectifying diode passes only half waves of a voltage of a DC of a battery(60). A condenser(C1) filters surge voltage and noise. A diode(ZD) is connected to a resistance(R1) in series, and passes voltages of a predetermined magnitude. A low voltage alarming portion(10) intermits the output voltage when a voltage which is lower than a predetermined value which is set by a diode(D) and a first transistor(Q1). A lamp filament heating portion(20) outputs a normal driving voltage. A coil(L1) outputs the inputted voltage into a stable voltage. The three wave inverter compact lamp for a DC comprises distribution resistance(R5,R6), third and fourth transistor(Q3,Q4), a transformer(T), a stabilizing portion(40), and a lamp portion(40).

Description

3-wavelength inverter compact lamp for direct current

The present invention relates to a three-wavelength inverter compact lamp, and more particularly, it is possible to light a fluorescent lamp at a high frequency with a direct current voltage (DC) generated from a general battery or a rechargeable battery instead of a commercial AC voltage (AC). The present invention relates to a three-wavelength inverter compact lamp for direct current.

Conventional fluorescent lamps, such as three-wavelength fluorescent lamps or incandescent lamps are mostly to be turned on by using an AC power source, the fluorescent lamp has a much higher light efficiency and longer life than incandescent lamps, When the lamp is operated at a high frequency of 20KHz or more, the luminous efficiency increases by about 15% or more.

It is a three-wavelength inverter compact lamp that makes it possible to light such a fluorescent lamp with a DC voltage.

However, since the three-wavelength inverter compact lamp has only a function of turning on a DC voltage, it may cause a fatal failure in the operation of the lamp when the polarity of the electrode is changed or the life of the lamp is expired due to incorrect wiring. there was. In addition, when the lamp filament preheating circuit is not incorporated, the impact voltage is applied to the lamp filament when the lamp is turned on, which shortens the lamp life and causes blackening.

Therefore, the compact lamp for DC voltage which can be used for emergency or portable use in the related art can operate the fluorescent lamp only by converting the low DC voltage into the high AC voltage, and the circuit characteristics deteriorate when a large current is flowed by the low DC voltage. In addition, there is a problem in that the lamp filament preheating circuit and various protection circuits must be integrated in a limited area of the lamp driving circuit board in order to extend the life of the lamp.

In addition, the one-seat flyback type DC lamp compact lamp was developed to compensate for the short-term use time of the halogen lamp or incandescent lamp using a conventional battery or battery compared to the capacity of the battery, but also the capacity is small The blackening phenomenon is fast when the lamp is turned on, and the uncomfortable problem of use is exposed due to the unstable features such as the shaking of the light.

The present invention has been made to solve the above problems, it is possible to light the fluorescent lamp at a DC voltage such as 12 ~ 48V, and to reduce the impact voltage applied to the lamp when the fluorescent lamp is turned on to extend the life of the lamp It can be extended, and it detects and informs when the supply voltage of the battery falls below the reference value while the lamp is on, and can protect the lamp even when it is incorrectly connected with the battery. It is an object to provide a three-wavelength inverter compact lamp.

1 is a configuration and power connection diagram of a three-wavelength inverter compact lamp for DC according to the present invention.

2 is another configuration of the present invention.

Figure 3 is a circuit diagram of a three-wavelength inverter compact lamp for DC according to the present invention.

♣ Explanation of symbols for main part of drawing ♣

10: low voltage alarm unit 20: lamp filament preheating unit

30: electronic ballast part 40: lamp part

42: electric wire 44: lamp hanger

46: base holder 48: cover

48a-48c: Air hole 50: Lamp

52, 53: Jack for connection 56: Socket

58: plug 60: battery

62: charger 100: circuit board

D: Diode C1-C6: Capacitor

R1-R6: resistor Q1-Q4: transistor

ZD: Zener Diode T: Transformer L1, L2: Coil

In order to achieve the above object, the present invention provides a half-wave rectifying diode that passes only a half-wave of a DC voltage of a battery applied through a fuse; A capacitor for filtering out surge voltages and noise components embedded in the DC voltage of the battery passing through the diode; A resistor connected in parallel to the capacitor to drop the voltage applied to the base terminal of the first transistor, a control diode connected in series with the resistor to conduct only a voltage of a predetermined size, and connected in parallel to the anode terminal of the zener diode A first transistor is connected to the capacitor terminal of the capacitor and the resistor and diode for charging and discharging the input voltage, a resistor is connected to the emitter terminal, and a base terminal is connected between the resistor and the zener diode to switch the applied voltage. A low voltage alarm configured to control an output voltage when a voltage lower than the voltage set by the control diode and the first transistor is applied; The base is connected to the emitter of the first transistor through a resistor, the collector is connected to the cathode of the diode via a resistor, and the emitter is connected to the anode of the zener diode through a capacitor to provide a low voltage for a period of time. A lamp filament preheating unit configured to output a normal driving voltage after the output; A coil for outputting the input voltage as a stable voltage, a distribution resistor for dropping the divided voltage connected in parallel to the emitter terminal of the second transistor, respectively, and a base terminal for the distribution resistor, respectively, and one end of the capacitor The third and fourth transistors for switching, the emitter ends of which are connected to the capacitor and the resistor; the primary winding is connected to the base ends of the third and fourth transistors; and the secondary windings of the third and fourth transistors. An electronic ballast unit configured to be connected to a collector end and a coil to output a high frequency sine wave by a turns ratio, and a capacitor and a coil connected to the secondary windings of the transformer in parallel and outputting a stable voltage; And a lamp unit connected to one end of the transformer and one end of the coil and having a filament capacitor connected in parallel to emit light having a predetermined brightness.

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

1 is a configuration and power connection diagram of a three-wavelength inverter compact lamp for direct current according to the present invention.

The lamp unit 40 includes a base holder 46 to which DC power is applied through the electric wire 42. The base holder 46 uses an insulator, and the circuit board 100 which lights the lamp 50 therein. ) Is built in.

On one side of the base holder 46, a lamp hanger 44 is formed to hang or fix the lamp unit 40, and the lamp hanger 44 has a ring shape or a circular ring shape in a detachable or predetermined direction. It is preferable that rotation is possible.

Reinforced cover 48 is inserted to one side of the base holder 46 is configured on the outside to protect the lamp 40 that emits light of three wavelengths, a plurality of air holes (48a-48c) are formed It is preferable to use transparent synthetic resin or tempered glass which is resistant to impact and heat. The plurality of air holes 48a to 48c form a plurality of air holes 48a and 48b at a portion where the base holder 46 and the cover 48 are coupled to each other. The hole 48c is formed to allow the air to flow out so that the heat generated by the lamp 50 can be discharged to the outside.

Lamp 50 is coupled to the coupling portion of the base holder 46 inside the cover 48 is turned on by the AC power applied from the circuit board 100, or three-wavelength lamp that emits light of three wavelengths Use ordinary fluorescent lamps in connection.

In addition, the lamp unit 40 includes a plurality of connecting jacks 52 and 53 configured in parallel to the wires 42 to which the DC power is applied, so that the plurality of lamp units 40 are connected to the connecting jacks 52 and 53. It was possible to connect and use.

In addition, one end of the wire 42 may be used by connecting the clip 59 so as to be connected to the plug 58 or the electrode of the general-purpose battery 60 to connect to the cigarette lighter socket 56 of the vehicle, In addition, the general rechargeable battery 60 may be connected to a charger 62 that can be charged by converting AC power into DC power.

The circuit board 100 is a low voltage alarm unit 10, a lamp 50 filament for the alarm when the DC power applied through the wire 42 is a low voltage or to prevent the electrode of the battery 60 is miswired It consists of circuits, such as the lamp filament preheating part 20 which preheats, the electronic ballast part 30 which lights the lamp 50, and the lamp part 40 which emits light of predetermined brightness.

The present invention having such a configuration will be described in detail with reference to the circuit diagram of FIG.

The diode D in the circuit functions to protect the input of the electronic ballast 30 by being connected only in the forward direction so that the electronic ballast 30 is not operated even if the polarity of the battery 60 is changed. That is, when the voltage of the battery 60 is applied to the diode D through the fuse F, if the negative polarity of the battery 60 is applied to the diode D, the voltage is cut off and is not applied (+). If the polarity is applied to the diode (D), the voltage is to be in a conductive state.

When the power of the battery 60 is applied through the diode (D), the capacitor (C1) connected in parallel absorbs and cuts out the noise and noise signal of the external or internal embedded in the power supply, and the input voltage (for example, 12V ) Is applied through the resistor R1, zener diode ZD, and resistor R3, voltage is applied to the base of the first transistor Q1, and the first transistor Q1 is turned on. The driving voltage of the base terminal is applied to the resistors R5 and R6 to the second transistor Q2 by R2 and R4, respectively, and when the voltage is low (about 10.5V), the breakdown voltage of the zener diode ZD breaks. Since the down is not operated, the charging and discharging are continued by the capacitors C2 and C3 and the resistor R3, so that the first transistor Q1 and the second transistor Q2 are repeatedly turned on and off, and thus the resistance ( The base stage driving voltages of R5 and R6 are also turned on and off continuously so that the lamp 50 on the output side is also continuous. Is a flashing light-up and light-off state.

The low voltage warning and at the same time the second transistor (Q2) is turned off when the input voltage is no longer, the electronic ballast 30 is shut down without operation (Shut Down) to use any more battery 60 This prevents the complete discharge of the battery 60 due to unauthorized use of the battery 60 in advance.

The high frequency transformer T formed in the electronic ballast 30 is a self-oscillating oscillator using the saturation characteristic of the transformer. The current flowing through the starting resistors R5 and R6 of the third and fourth transistors Q3 and Q4 is the first. If it flows to the base end of the third and fourth transistors Q3 and Q4, an unbalance between the third and fourth transistors Q3 and Q4 causes one of the transistors (for example, the third transistor Q3) to conduct first. Becomes As a result, when the third transistor Q3 is turned on, a voltage is generated in the primary winding of the transformer T connected to the base terminal to turn on the fourth transistor Q4 again, so that the third and fourth transistors Q3 are instantly turned on. , Q4) is turned on.

When the third and fourth transistors Q3 and Q4 are turned on, currents of the primary winding corresponding to the excitation current and the load current of the transformer T flow through the third and fourth transistors Q3 and Q4. When the magnetic flux density increases, and reaches the saturation point value (ie, Bm) of the core of the transformer T, the magnetic flux density reaches the point where the magnetic flux density does not change. At this time, the transformer T becomes equal to the coil of the air core, and thus the inductance decreases rapidly, thereby increasing the collector current of the switching transistor. Therefore, the output side voltage of the lamp stage rises rapidly to perform the function of preheating the filament of the lamp 50.

When the collector current increases and the transistor is out of saturation, V _CE of the switching transistor increases and the primary winding voltage of the transformer T decreases by that amount. Therefore, the base voltage of the switching transistor is also lowered and the transistor is operated in the direction of turning off the transistor. When the transistor is turned off, the winding voltage of the transformer T is reversed so that the other transistor is turned on and the oscillation continues by repeating the same operation as before. Therefore, the output lamp 50 is a safety light.

As described above, the circuit of the present invention uses the transformer T as an unsaturated transformer and the base stage driving transformer as a supersaturated transformer (X _L ). Therefore, the oscillation frequency is determined by the supersaturated transformer X _L , and the transformer T does not need to operate in the saturation region, so that the core can be used even at a low magnetic flux density, and the transformer T can be efficiently operated. Therefore, the base stage driving transformer X _L can be miniaturized to be used in a saturation state, and this loss is almost negligible. In addition, when the base stage driving transformer X _L is saturated, the current flowing through the transformer X _L is limited by the resistors R5 and R6, so that the loss of the switching transistor does not increase by this current.

In the operation of the resonant circuit, when the output voltage is decreased, the equivalent impedance X _L of the supersaturated reactor is lower than the impedance X _C of the parallel capacitor to this impedance, and the parallel synthesized impedance X ' _L of X _L and X _C is inductive. . Thus, the circuit is a series circuit with the unsaturated reactor L1 input voltage is divided by the partial pressure action of the L1 and X _'L output voltage is lowered. When the output voltage is increased, the impedance of the supersaturated reactor is raised to X _C < X _{L so} that the combined value of X _C and X _L becomes capacitive and becomes the impedance X ' _C. Therefore, the input voltage to the series resonance circuit and the input voltage of the series reactors L1 impedance and X 'is _C n times is so output the output voltage is increased to stably operate with respect to load variation.

The AC output waveform can be reduced in noise by the parallel capacitors X _C and C5, and the waveform can be shaped to obtain a high frequency sine waveform. The lighting of the lamp 50 is based on the output winding ratio of the transformer T. A sinusoidal waveform of about 100 KHz 200-300 V is output, and the lamp 50 is turned on by the inductance L2 and the filament C6. The operating voltage is maintained.

The three-wavelength inverter compact lamp for DC of the present invention may also be applied to general AC, and may rectify AC 110 / 220V to DC voltage at an input terminal of the primary side to boost and step down a transformer to configure a resonance type.

It will be easily understood by those skilled in the art that the three-wavelength inverter compact lamp for direct current of the present invention can be sufficiently converted, substituted, and changed in consideration of the above description, and it is within the scope of the present invention. Other embodiments are contemplated, and the scope of the present invention is not limited.

As described above, the present invention utilizes an alarm circuit that warns a user by flashing a lamp when a voltage input by a combination of a zener diode and a plurality of transistors falls below a predetermined voltage, and uses a characteristic of charging and discharging with a configuration of a resistor and a capacitor. Lamp filament preheating circuit to allow low voltage to be transferred to the switching element for a certain time after the power is input, and to perform full-scale operation, an electronic ballast circuit for lighting the lamp, and a lamp that emits light of a predetermined intensity. By configuring the circuit and using the above-described resonant circuit, switching loss of the transistor can be minimized during high frequency switching, thereby eliminating heat loss, high efficiency of operation, and miniaturization.

In addition, the filament of the lamp can be preheated with instantaneous high output voltage to prevent blackening of the lamp, and because the output waveform is sinusoidal, the lamp current waveform is good and the life of the lamp is long. Or you can use electric wiring or clip wiring for general battery, and you can get maximum three wavelengths of brightness even with low power, and the lamp can withstand external shocks due to the reinforced cover. It is convenient to move and simple to install.

Claims (3)

A half-wave rectifying diode D for passing only a (+) half wave of the DC voltage of the battery 60 applied through the fuse F; A capacitor C1 for filtering out surge voltages and noise components embedded in the DC voltage of the battery 60 passing through the diode D; A resistor R1 connected in parallel with the capacitor C1 to drop a voltage applied to the base terminal of the first transistor Q1; A control diode (ZD) connected in series with a resistor (R1) to conduct only a voltage of a predetermined magnitude; A capacitor C2 and a resistor R4 connected in parallel to the anode terminal of the zener diode ZD to charge and discharge the input voltage; A collector terminal is connected to the cathode terminal of the diode D, a resistor R2 is connected to the emitter terminal, and a base terminal is connected between the resistor R1 and the zener diode ZD to switch the applied voltage. A low voltage alarm unit configured to include a transistor (Q1) to control the output voltage when a voltage lower than the voltage set by the control diode (D) and the first transistor (Q1) is applied; The base end is connected to the emitter end of the first transistor Q1 through a resistor R1, the collector end is connected to the cathode end of the diode D through a resistor R3, and the emitter end is a zener diode ZD. A lamp filament preheating unit 20 connected to an anode end of the lamp filament preheater 20 to output a normal driving voltage after outputting a low voltage for a predetermined time; A coil L1 for outputting the input voltage at a stable voltage; Distribution resistors R5 and R6 connected in parallel to the emitter terminals of the second transistor Q2 to drop the divided voltage; The third and fourth transistors for switching are connected to the distribution resistors (R5, R6), respectively, the base terminal is connected to one end of the capacitor (C4), the emitter terminal is connected to the capacitor (C2) and the resistor (R4). (Q3, Q4) and, The primary winding is connected to the base ends of the third and fourth transistors Q3 and Q4, and the secondary winding is connected to the collector ends of the third and fourth transistors Q3 and Q4 and the coil L1, and thus, by the turns ratio. Transformer (T) which outputs high frequency sine wave and An electronic ballast unit 40 configured to be connected to the secondary windings of the transformer T1 in series and parallel to each other to output a stable voltage, and to stably turn on a lamp by using a capacitor C5 and a coil L2; And It is connected to one end of the transformer (T) and one end of the coil (L2), the filament condenser (C6) is connected in parallel is a three-wavelength for direct current, characterized in that consisting of a lamp unit 40 for emitting light of a predetermined brightness Inverter compact lamp. The method of claim 1, wherein the lamp unit 40 A base holder 46 to which DC power is applied via the wire 42; Lamp hanger 44 mounted on one side of the base holder 46, A lamp 40 inserted into one side of the base holder 46 and emitting three wavelengths of light; and DC-wavelength inverter compact lamp, characterized in that a plurality of air holes (48a-48c) is formed and is configured on the outside of the lamp 50 to further protect the lamp (50). The method of claim 2, wherein the lamp unit 40 A plurality of connecting jacks 52 and 53 configured in parallel to the wire 42 to which the DC power is applied; A plug 58 configured to connect one end of the wire 42 to the cigarette lighter socket 56 of the vehicle, A clip 59 configured such that one end of the wire 42 can be connected to the electrode of the general purpose battery 60; and The three-wavelength inverter compact lamp for direct current, characterized in that the charger 62 which is capable of charging the battery 60 by converting AC power into DC power is selectively connected.