CN2139339Y - Hybrid-type light-regulating energy-saving lamp - Google Patents

Abstract

The device provides a novel energy-saving lamp which can regulate light within large range. The device has the characteristics of hybrid excitation light emission technology of alternate current and direct current electric fields, soft start filament heating technology and power regulation technology. The device is characterized in that the excitation power supply is composed of hybrid alternate current and direct current excitation sources, and inputs and outputs of the alternate current and direct current excitation sources are respectively connected; the external side of a filament of the lamp tube is connected with a filament heating capacitor in parallel, and the filament heating capacitor is classified by a diode; the power regulator is arranged in an alternate current excitation source system, and regulates the light through changing the alternate current source power. The utility model achieves three purposes of energy saving, service life prolonging and light regulation.

Description

Hybrid-type light-regulating energy-saving lamp

The present invention relates to a kind of light modulation, energy-conservation fluorescent lamp or fluorescent lamp, belong to electronics and electric light source technology field.Described electricity-saving lamp comprises fluorescent tube, power supply, power governor three parts.This inventive features is to adopt the method for direct current, interchange mixed excitation to make fluorescent lamp luminous, so as to solving the problem that light modulation on a large scale that present fluorescent lamp or fluorescent lamp exist or light modulation on a large scale reduce lamp tube service life, the present invention has also solved the technical problem that present electric ballast overvoltage burns out with the pressure limiting technology, makes the real practicability of electricity-saving lamp technology.

The electricity-saving lamp ubiquity three big technological deficiencies of present commercially available electronic ballast control can not large tracts of land be promoted the use of it.This three big technological deficiency is:

1. cold start-up, the filament initial excitation is undesired, causes near the lamp tube wall blackening of filament;

2. when adopting voltage-control dimming, low voltage starting is not only unstable but also the easier initial excitation that makes is not normal, causes described lamp tube wall blackening;

3. when the electrical network overvoltage, often burn transistor or field effect transistor.

The object of the invention just is to adopt the series of new techniques method to overcome above-mentioned defective, makes novel florescent lamp that be arranged longer useful life, light modulation on a large scale, avoids overvoltage to burn components and parts.These a series of novel technical methods are:

1. set up the circuit of special heat filament, not only can under normal pressure, realize warm start but also transfer to still obtaining identical initial filament heating when minimum and realizing warm start at power, thereby solved fluorescent tube blackening problem under normal pressure and the low pressure preferably, improved the useful life of electricity-saving lamp effectively, especially provide the possibility of practicability for regulating the power light modulation.

The electric circuit characteristic of this special heat filament is:

A. other and connect the circuit of a diode and capacitances in series in the load capacitance in the filament outside, this capacity ratio load capacitance is much bigger, and it makes filament obtain enough instantaneous heating currents the load capacitance short circuit when startup.This electric capacity is referred to as filament and adds thermal capacitance, and it has solved filament heating starting problem, will improve lamp tube service life greatly.

B. provide a DC source for above-mentioned filament adds thermal capacitance, this DC source does not change with AC voltage adjusting.

2. above-mentioned DC source is also applying a continuous current excitation electric field giving between two filaments after the startup when starting the heat filament, and the ac-excited electric field superposition that this electric field and electric ballast provide has formed hybrid excitation luminescence new method.So this DC source is the filament heating source is again DC source of energization.Lamp luminescence was adjustable and stable when this method changed ac-excited power significantly.

3. in the DC side of described electric ballast rectifier bridge and connect a piezo-resistance, prevent under overpressure situation, to burn power tube.

Constructive method as for the electric ballast power governor then is not only much but also easier, and for example AC voltage adjusting method, power tube control signal are regulated method, duty cycle adjustment method, choke induction adjusting method or the like.

Specify the ins and outs of foregoing invention below in conjunction with embodiment.

Fig. 1 is the 1st an embodiment schematic diagram of foregoing invention, and power governor is an AC voltage regulator.

Fig. 2 is the 2nd an embodiment schematic diagram of foregoing invention, and power governor is the power tube controller.

Fig. 3 is the 3rd an embodiment schematic diagram of foregoing invention, and power governor is the duty cycle adjustment device.

Fig. 4 is the 4th an embodiment schematic diagram of foregoing invention, and power governor is an induction regulator.

Fig. 5 is the 5th an embodiment schematic diagram of foregoing invention, and power governor is a chopper.

Referring to Fig. 1, power governor is AC voltage regulator ［ 8 ］ among the embodiment 1.DC power supply ［ 1 ］ input is in parallel with the input of described voltage regulator ［ 8 ］, the dc output end of DC power supply ［ a 1 ］ starting resistance of serial connection ［ 9 ］ afterwards and the inboard of receiving fluorescent tube ［ 3 ］ filament, the output of voltage regulator ［ 8 ］ is the ac input end of electric ballast ［ 2 ］.Load capacitance ［ 4 ］ is serially connected between the filament in the outside of fluorescent tube ［ 3 ］, decides utmost point diode ［ 5 ］ and filament and adds thermal capacitance ［ 6 ］ and be connected in parallel on electric capacity ［ 4 ］ two ends after connecting, and the described two ends that add thermal capacitance ［ 6 ］ again and be connected to discharge resistance ［ 7 ］.Obviously, the filament heating has an independently circuit, no matter how the power of described electric ballast ［ 2 ］ changes, the heating intensity that starts instantaneous filament all is the same.This has just guaranteed under any circumstance all to be avoided cold start-up.In addition, after warm start finished, DC power supply ［ 1 ］ had formed a continuous current excitation electric field between two filaments, and it and the formed ac-excited electric field of electric ballast ［ 2 ］ are coupled mutually.Experiment showed, a little less than the alterating and direct current field intensity to all can not making separately under the normal luminous situation of fluorescent tube, two electric field superpositions coupling backs just can be normally luminous.This normal luminous variation with ac electric field strength changes brightness, thereby has reached the light modulation purpose.Looking heating intensity resistance ［ 9 ］ here, can cancel.Voltage regulator ［ 8 ］ can be the controllable silicon phase-shift voltage regulating, also can be the autotransformer pressure regulation, and pressure regulation can manually also can remote control.

With reference to figure 2, power governor among the embodiment 2 is power tube controller ［ 10 ］, its control method is: when the electric ballast power tube is transistor ［ 11 ］, can be at a transistor base input serial connection potentiometer ［ 12 ］ or between basic emitter-base bandgap grading and connect a potentiometer ［ 13 ］, potentiometer can also be the discontinuous resistance device ［ 14 ］ in parallel with electronics or mechanical switch control, regulates base current so as to regulating power with these methods; When power tube is field effect transistor ［ 15 ］, can and connect potentiometer ［ 13 ］ between the grid source electrode of pipe ［ 15 ］ and connect a fixed resistance ［ 16 ］ at gate input, perhaps ［ 13 ］ are replaced with ［ 16 ］ and are come, utilize the method for WITH THE ADJUSTABLE INTRINSIC STAND-OFF RATIO to regulate gate source voltage, for safety still need utilize voltage stabilizing didoe ［ 17 ］ limit ［ 13 ］, ［ 16 ］ pressure drop and.Similarly, potentiometer ［ 13 ］ can be the above-mentioned device ［ 14 ］ in parallel of the resistance with switch control.To also have a kind of way be between the grid source electrode and connect a voltage-stabiliser tube device ［ 18 ］ in parallel with machinery or electronic switch control, presses so as to regulating the grid source.Regulate electric ballast power with these tuned grid source voltage method.Described switch can manual control also can remote control.

Referring to Fig. 3, the power governor among the embodiment 3 is duty cycle adjustment device ［ 19 ］.Its method is: connect the output of duty cycle adjustment device ［ 19 ］ on the control end ［ 21 ］ of electric ballast power tube ［ 20 ］, apply the control signal of EDM Generator of Adjustable Duty Ratio.In a cycle of oscillation, utilize the adjusting of duty ratio, can regulate the ON time of power tube, so as to regulating power.Obviously, in the one-period, " sky " should be respectively to be 50%(power maximum case with the limit that " accounting for " regulates).The duty cycle adjustment device is the square-pulse generator of the EDM Generator of Adjustable Duty Ratio of a specific period, and such generator can be enumerated many in digital circuit technique, needn't give unnecessary details here.What described specific period was best is the cycle that natural mode shape determined that is formed by electric ballast electric capacity, inductance, is beneficial to reach optimum energy-saving effect.

With reference to Fig. 4, the power governor among the embodiment 4 is induction regulator ［ 22 ］.Its method is: regulate the inductance of electric ballast choke, so as to regulating power.Adjuster has ［ 25 ］ two types of leakage field adjuster ［ 24 ］, coil adjusters, described leakage field adjuster is to utilize the relative position of regulating between moving iron core ［ 26 ］ and the static iron core ［ 27 ］ to realize regulating the choke inductance so as to regulating leakage field, and ［ 23 ］ are coils among the figure.Described coil adjuster ［ 25 ］ is to utilize short circuit and the different coils of serial connection to change the inductance of choke so as to the way that changes total number of coils.For example switch ［ 28 ］ can make total number of turns by N ₁+ N ₂Change into N ₁Switch ［ 28 ］ can be machinery also can be electronics, it also can be a plurality of can being one, N ₁, N ₂Such sub-coil also can be a plurality of.Switch ［ 28 ］ is can manual control also remote-controlled.

Referring to Fig. 5, the power governor among the embodiment 5 is a current chopping device.［ 29 ］ are switching tubes among the figure, its control utmost point ［ 30 ］ is connected to and accounts for control than adjustable oscillator ［ 31 ］, regulate duty ratio, size that just can by-pass cock pipe output current, so as to regulating the power output of electric ballast, present embodiment and the difference of embodiment 3 are to be applied directly on the filament after switching tube directly becomes square-wave pulse with the DC chopped-wave of rectifier bridge ［ 32 ］ output, and do not have the oscillatory process that discharges and recharges of electric capacity.［ 33 ］ are described piezo-resistances among the figure, and as the aforementioned electronic ballast, it is attempted by between the described DC power supply both positive and negative polarity that electric ballast arranged, so as to protection power tube and other components and parts.［ 34 ］, ［ 35 ］ are respectively current-limiting resistance and voltage-stabiliser tube among the figure, so that a suitable power supply is provided for oscillator ［ 31 ］.The positive pole of electric capacity ［ 36 ］ the one described suitable power source of termination among the figure, end connects the control utmost point ［ 30 ］ (for example grid of field effect transistor) of switching tube ［ 29 ］ by diode ［ 39 ］ in addition, be connected to discharge resistance ［ 37 ］ and discharge diode ［ 38 ］ on the positive pole of electric capacity ［ 36 ］ respectively, their other end then all is connected on the power cathode.After mains switch was opened, electric capacity ［ 36 ］ charging was opened the full phase angle of switching tube ［ 29 ］, and switching tube ［ 29 ］ then was controlled by the oscillator ［ 31 ］ of EDM Generator of Adjustable Duty Ratio after charging finished, thereby DC source copped wave is powered.Full phase angle is that direct current starts heat filament when opening, and the copped wave power supply is the alternating current-direct current mixed excitation.Certainly, still can apply an other DC power supply ［ 1 ］ again between inboard two filaments of fluorescent tube.Be that this is a kind of copped wave inverter of EDM Generator of Adjustable Duty Ratio of alternating current-direct current excitation.

Only narrate power among above-mentioned 2～4 embodiment and transferred device, electric ballast in these embodiments ［ 2 ］ as its output of ac-excited source all with DC source of energization ［ a 1 ］ output-parallel independently, the load capacitor ［ 4 ］ outside the fluorescent tube all is parallel with diode ［ 5 ］ to be decided the filament of the utmost point and adds thermal capacitance ［ 6 ］.Because of these contents are identical with embodiment 1, so do not pay one by one.

Described DC source of energization ［ 1 ］ can be the rectification source of any type of AC-DC, especially voltage multiplying rectifier source.

Most preferred embodiment is the alternating current-direct current mixed excitation power supply that voltage regulator class power governor is formed in the foregoing description.

Experiment shows that the technology of the present invention is effective.

Claims (10)

1, a kind of energy saving and brightness controlling lamp, comprise fluorescent tube, excitation power supply, power governor three parts, it is characterized in that: described excitation power supply is made of input, output AC and DC driving source mixing in parallel respectively, the filament of the described fluorescent tube outside also connects a filament of deciding the utmost point through diode and adds thermal capacitance, described power governor is located in the ac-excited origin system, with the way light modulation that changes described alternating current source power.

2, according to the described electricity-saving lamp of claim 1, it is characterized in that: described interchange, continuous current excitation source output terminal are attempted by the inboard of described tube filament, and the described filament in its outside adds thermal capacitance also and connect a discharge resistance.

3, according to the described electricity-saving lamp of claim 1, it is characterized in that: described DC source of energization is a voltage multiplying rectifier source, and string has a starting resistance in its DC side.

4, according to the described electricity-saving lamp of claim 1, it is characterized in that: described ac-excited source is rectifier bridge DC side and the electric ballast that connects piezo-resistance.

5, according to claim 1 and 4 described electricity-saving lamps, it is characterized in that: described power governor is one and the voltage regulator that exchanges input is provided for described electric ballast.

6, according to claim 1 and 4 described electricity-saving lamps, it is characterized in that: described power governor is the transistor base current adjuster of described electric ballast or the field effect transistor gate source voltage adjuster of described electric ballast.

7, according to claim 1 and 4 described electricity-saving lamps, it is characterized in that: described power governor is the duty cycle adjustment device of a control electric ballast power tube.

8, according to the described electricity-saving lamp of claim 1, it is characterized in that: described alternating current-direct current mixed excitation source and power governor are that a direct current starts, the copped wave inverter of the EDM Generator of Adjustable Duty Ratio of alternating current-direct current excitation.

9, according to the described electricity-saving lamp of claim 1, it is characterized in that: described power governor is the choke induction regulator of an electric ballast.

10, according to claim 1,5,6,7,8 described electricity-saving lamps, it is characterized in that: the control of described power governor can manual control also can remote control.

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