KR19990020704A - Gas line inverter with duty cycle and phase compensation - Google Patents

Abstract

The present invention relates to a gas pipe inverter having a duty cycle and a phase correction function, and to remove low frequency noise included in electricity input through an AC input terminal (AC IN), a capacitor (C ₁₎ connected to both ends of the AC input terminal A first filter (10) consisting of; A driving voltage generator (R _H , 15) for receiving the power from which the noise has been removed by the first filter (10) and converting it into a DC voltage having a predetermined voltage and outputting the converted voltage; By removing the high-frequency noise flowing through the power line or generated from the bottom by bypassing the frame ground (FG), a pair of capacitors connected in series so that the intermediate terminal is connected to the frame ground (FG), A second filter 20 formed of a capacitor C ₂ connected in parallel to a pair of capacitors; An operating power generation unit (R _L ) 25 which receives the power passing through the second filter 20 and converts it into a DC voltage having a predetermined voltage and outputs the converted voltage; An oscillator (IC) for generating an oscillation signal having a predetermined frequency using the DC voltage output by the operating power generator 25 as an operating power source; A switching unit 80 which receives the signal output by the oscillation unit IC and switches the driving power generated by the driving power generation unit 15 to output the switching power; The switching unit 80 is composed of a high-voltage transformer 90 for driving the gas pipe receives the driving power output is switched to a predetermined frequency.

Description

Gas line inverter with duty cycle and phase compensation

The present invention relates to a gas pipe inverter having a duty cycle and phase correction function, and more particularly, to remove high frequency noise and radiation noise from a power source for driving a gas pipe such as a neon tube, and to have a duty control and phase correction function of an oscillation frequency. It relates to a gas pipe inverter.

The conventional neon tube inverter circuit, as shown in Figure 1, and the high voltage generator (HV) for generating a high voltage for driving the neon tube; A low voltage generator LV for generating a low voltage for switching control of the high voltage generator HV; And a filter (C _{X1, 2} , C _{Y1, 2} ) for removing the high frequency noise (RFI) and the radiation noise (EMI) introduced into the high voltage generator (HV) and the low voltage generator (LV). The filter includes a capacitor (C _X1 ) having both ends connected to one end of a primary coil and a secondary coil of a transformer (T _F ) serving as a choke coil, and a primary coil and a secondary coil of a transformer (T _F ). The other end of the capacitor is connected to the capacitor (C _X2 ), and two connected in series is composed of the capacitor (C _{Y1, 2} ) connected in parallel to the capacitor (C _X2 ).

The high voltage generator HV includes a rectifier R _H connected to the other ends of the primary and secondary coils of the transformer T _F to rectify the low voltage generator LV. Is the power transformer T _P connected to the other ends of the primary and secondary coils of the transformer T _F to drop to a suitable voltage, and the secondary of the power transformer T _P. The low voltage rectifier R _L is connected to the coil to rectify the DC voltage.

The conventional neon tube inverter configured as described above generates a neon tube drive current having a predetermined frequency using the voltage of the high voltage generator, and controls the switching of the neon tube drive current using the voltage of the low voltage generator to drive the neon tube.

However, in the conventional neon tube inverter, high frequency noise is introduced into the voltage applied to the low voltage portion, a separate transformer is required for generating low voltage, and water droplets flow in the neon tube when driving the neon tube by generating high frequency and high voltage. There was a problem such as a water droplet phenomenon of blackening and the blackening phenomenon that turns around the electrode is black.

The present invention is to solve the problems of the prior art as described above, to prevent the induction of high-frequency noise and radiation noise to the driving voltage for driving a gas pipe, such as neon tube to improve the driving efficiency of the gas pipe, neon tube The purpose of the present invention is to provide a gas line inverter having a duty cycle and a phase hearing function to prevent water droplets and blackening from occurring.

In order to achieve the above object, the present invention, in the inverter for driving the gas pipe, to remove the low-frequency noise contained in the electricity input through the AC input terminal, the first consisting of a capacitor connected to both ends of the AC input terminal A filter; A driving voltage generator which receives power from which noise is removed by the first filter, converts the DC power into a DC voltage having a predetermined voltage, and outputs the converted voltage; By removing the high-frequency noise flowing through the power line or generated by the bypass through the frame ground (FG), a pair of capacitors connected in series with each other so that the intermediate terminal is connected to the frame ground (FG), A second filter comprising a capacitor connected in parallel to a pair of capacitors; An operating power generation unit which receives the power passing through the second filter and converts the power into a DC voltage having a predetermined voltage and outputs the converted voltage; An oscillator for generating an oscillation signal having a predetermined frequency using the DC voltage output by the operating power generator as an operating power source; A switching unit which receives a signal output by oscillation by the oscillation unit and switches the driving power generated by the driving power generation unit to output the switching power; It has a duty cycle and phase correction function, characterized in that it comprises a high-voltage transformer for receiving the driving power output is switched to the predetermined frequency by the switching unit and outputs a voltage for driving the gas pipe with a predetermined voltage Provide a gas line inverter.

1 is a circuit diagram showing a gas pipe inverter according to the prior art;

2 is a gas line inverter circuit diagram having a duty cycle and a phase correction function according to the present invention.

Explanation of symbols for main parts of the drawings

10: low frequency filter 15: driving power generation unit

20: high frequency filter 25: operating power generating unit

30: phase correction circuit 40: duty control unit

50: current sensor 60: frequency setting unit

70 noise filter 80 switching unit

90: high voltage transformer 100: output monitoring unit

IC: Oscillating IC

The configuration and operation of a gas pipeline inverter having a duty cycle and phase correction function according to the present invention will be described in detail through one embodiment of the present invention.

2 is a circuit diagram illustrating a gas pipe inverter having a duty cycle and a phase correction function according to the present invention.

As shown in FIG. 2, a gas pipe inverter having a duty cycle and a phase correction function according to the present invention has a low frequency included in electricity input through an AC input terminal (AC IN) in an inverter for driving a gas pipe. A first filter 10 formed of a capacitor C ₁ connected to both ends of the AC input terminal to remove noise; A driving voltage generator (R _H , 15) for receiving the power from which the noise has been removed by the first filter (10) and converting it into a DC voltage having a predetermined voltage and outputting the converted voltage; By removing the high-frequency noise flowing through the power line or generated by the bypass through the frame ground (FG), a pair of capacitors connected in series so that the intermediate terminal is connected to the frame ground (FG), A second filter 20 formed of a capacitor C ₂ connected in parallel to the capacitor; An operating power generation unit (R _L ) 25 which receives the power passing through the second filter 20 and converts it into a DC voltage having a predetermined voltage and outputs the converted voltage; An oscillator (IC) for generating an oscillation signal having a predetermined frequency using the DC voltage output by the operating power generator 25 as an operating power source; A switching unit (80) for receiving a signal output by the oscillation unit (IC) and switching the driving power generated by the driving power generation unit (15) to output the switching signal; The switching unit 80 receives a driving power that is switched at a predetermined frequency and is output, and includes a high voltage transformer 90 for outputting a voltage for driving the gas pipe with a predetermined voltage.

In addition, a noise filter 70 for removing noise included in the oscillation signal output by the oscillator IC is connected to the front end of the switching unit 80.

In order to monitor the output state of the high voltage transformer 90, a transformer (CT) for converting the high voltage of the high voltage transformer (90) into a low voltage and a voltage dropped by the transformer (CT). The high voltage transformer 90 includes a rectifier Rec for converting to a voltage and a comparator D _Z2 , R _{5, 6 for} comparing the voltage rectified and output by the rectifier Rec with a reference voltage. The output monitoring unit 100 for stopping the oscillation of the oscillation unit IC is connected between the high voltage transformer 90 and the oscillation unit IC when the output state of the control unit is overloaded or unloaded.

In addition, the oscillator IC corrects the phase of the oscillation frequency of the oscillator IC. The oscillator IC includes an SCR, resistors R _{3 and 4} diodes SWD, and capacitors C ₃ , and monitors the output. A phase correction circuit 30 for detecting and correcting a phase of a voltage output from the signal of the unit 100 is added.

In addition, by controlling the duty cycle of the oscillation output frequency by the oscillator (IC), the duty controller 40 consisting of resistors (R _{7, 8, 9} ), capacitor (C ₄ ) is connected, A current sensor 50 consisting of a resistor R ₁₀ and a capacitor C ₅ is connected by sensing the current of the driving power output by the high voltage transformer 90 to control the output current.

On the other hand, the oscillation frequency of the oscillation unit (IC) is determined by the frequency setting unit 60, the frequency setting unit 60 is composed of a resistor (R _{T1, 2} ), the capacitor (C _T ).

The switching unit 80 receives a predetermined high frequency output from the oscillator IC and serves to switch according to the duty cycle adjusted by the duty controller 40. A pair of damping resistors R ₁₂ for damping the ends of the primary coil 81 connected to the IC) and each of the pair of coils 82 and 83 opposed to the primary coil 81. _{, 13} ), and a pair of switching FETs (field effect transistors Q _{1 and 2} ) are connected. The outputs of these switching FETs Q ₁ and ₂ are input to the input terminal of the high voltage transformer 90.

The gas pipeline inverter having the duty cycle and phase correction function according to the present invention configured as described above operates as follows.

The first filter 10 removes the low frequency noise introduced through the AC input terminal, and the second filter 20 bypasses the noise generated from the power line and itself through the frame ground. The noise-removed power is input to the driving power generator 15 and the operating power generator 25, respectively.

The power generated by the driving power generator 15 is connected to the switching unit 80, and the power generated by the operating power generator 25 is supplied to the operating power of the oscillator IC.

The oscillation unit IC is set by the frequency setting unit 60 and the oscillation frequency is set, and the duty control unit 40 oscillates and outputs the frequency whose duty cycle is controlled.

The frequency oscillated by the oscillator IC is connected to the input terminal of the switching unit 80 by removing noise by the noise filter 70.

The switching unit 80 receives the oscillation frequency and switches the driving power supplied by the driving power generation unit 15 to be input to the high voltage transformer 90.

The high voltage transformer 90 is switched to a predetermined frequency to boost the input power supply to the gas pipe to drive the gas pipe.

At this time, the output monitoring unit 100 monitors the output state of the high-voltage transformer 90 and stops the oscillation of the oscillation unit IC in the case of an overload or no-load state.

The gas pipe inverter having a duty cycle and phase correction function according to the present invention configured as described above improves the driving efficiency of the gas pipe by preventing high frequency noise and radiation noise from being introduced into a driving voltage for driving the gas pipe such as a neon tube. In addition, it has the duty control and phase correction function of the oscillation frequency, thereby providing the effect of preventing the drop of water, such as flowing water, and the blackening occurring in the electrode part when the neon tube is driven.

While the present invention has been illustrated and described with reference to preferred embodiments, the present invention is not limited to the above-described embodiments, and the present invention is not limited to the above-described embodiments, and has a general knowledge in the technical field to which the present invention belongs. Various changes and modifications may be made by the user.

Claims (6)

In the inverter that drives the gas pipe, A first filter 10 which removes low frequency noise included in electricity input through an AC input terminal AC IN, and includes a capacitor C ₁ connected to both ends of the AC input terminal; A driving voltage generator (R _H , 15) for receiving the power from which the noise has been removed by the first filter (10) and converting it into a DC voltage having a predetermined voltage and outputting the converted voltage; By removing the high-frequency noise flowing through the power line or generated by the bypass through the frame ground (FG), a pair of capacitors connected in series so that the intermediate terminal is connected to the frame ground (FG), A second filter 20 formed of a capacitor C ₂ connected in parallel to the capacitor; An operating power generation unit (R _L ) 25 which receives the power passing through the second filter 20 and converts it into a DC voltage having a predetermined voltage and outputs the converted voltage; An oscillator (IC) for generating an oscillation signal having a predetermined frequency using the DC voltage output by the operating power generator 25 as an operating power source; A switching unit (80) for receiving a signal output by the oscillation unit (IC) and switching the driving power generated by the driving power generation unit (15) to output the switching signal; Duty cycle characterized in that it comprises a high-voltage transformer (90) for receiving the driving power is switched to the predetermined frequency output by the switching unit 80 and outputs a voltage for driving the gas pipe with a predetermined voltage And a gas pipe inverter having a phase correction function. The gas pipe inverter of claim 1, further comprising a noise filter (70) for removing noise included in the oscillation signal output by the oscillator (IC). The transformer (CT) for monitoring the output state of the high voltage transformer (90) as described in claim 1, wherein the transformer (CT) converts the high voltage of the high voltage transformer (90) into a low sum voltage. The rectifier Rec converts the dropped voltage into a DC voltage, and the comparator D _Z2 , R _{5, 6} comparing the voltage rectified and output by the rectifier Rec with a reference voltage. And an output monitoring unit (100) which stops oscillation of the oscillation unit (IC) when the output state of the high voltage transformer (90) is overloaded or unloaded. The method of claim 1, wherein the oscillator IC corrects the phase of the oscillation frequency of the oscillator IC, and includes an SCR, resistors R _{3 and 4} diodes SWD, and capacitors C ₃ . A gas pipeline inverter having a duty cycle and a phase correction function, characterized in that it further comprises a phase correction circuit (30) for detecting and correcting the phase of the output voltage by receiving a signal from the output monitoring unit (100). The method of claim 1, further comprising a duty controller 40 consisting of a resistor (R _{7, 8, 9} ), the capacitor (C ₄ ) by controlling the duty cycle of the frequency output by the oscillator (IC). A gas pipe inverter having a duty cycle and a phase correction function. The current sensor 50 of claim 1, which senses the current of the driving power output by the high voltage transformer 90 and controls the output current, wherein the current sensor 50 includes a resistor R ₁₀ and a capacitor C ₅ . A gas pipeline inverter having a duty cycle and a phase correction function, further comprising.