CN200973196Y

CN200973196Y - Light regulator for light regulatable type ballast

Info

Publication number: CN200973196Y
Application number: CN 200620047614
Authority: CN
Inventors: 朱永斌
Original assignee: WINTOP ELECTRIC(SHANGHAI) CO Ltd
Current assignee: WINTOP ELECTRIC(SHANGHAI) CO Ltd
Priority date: 2006-11-09
Filing date: 2006-11-09
Publication date: 2007-11-07
Anticipated expiration: 2016-11-09

Abstract

The utility model relates to a dimmer for the adjustable-light ballast, in particular pertains to a universal active dimmer, which comprises an AC/DC commutation circuit and a potentiometer circuit, wherein the AC/DC commutation circuit is composed of an AC/DC rectification voltage division circuit and a DC/DC commutation chip; the common civil power supply passes the AC/DC commutation circuit and obtains the DC power; and the DC power passes the potentiometer circuit to adjustably obtain a DC control voltage with the scope of DC1-10V that is conveyed to the adjustable-light ballast to conduct the analog light adjustment. Meanwhile, the potentiometer circuit also integrates the dimmer power supply switch. The technology of the utility model is used to the dimmer for the adjustable-light ballast and has the advantages of convenient control, simple structure and easy substitution. In actual use, the configuration is flexible and the active working mode is adopted to be independent from the ballast. In the illumination system, the utility model solves the possible problem of compatibility and upgrading.

Description

The dimmer that is used for tunable optical type ballast

Technical field

The utility model relates to the illumination field of household appliances, relates in particular to a kind of general dimmer that is used for tunable optical type rectifier.

Background technology

Fluorescent light tool on the present market, its ballast major part does not possess dimming function, fluorescent lamp can only carry out full power operation, along with being rooted in the hearts of the people of energy-conservation notion, the illumination industry mainstream vendor who comprises Ou Silang (OSRAM), Philip (PHILIP), Siemens (SIEMENS), all develop and released tunable optical type ballast, be used for the light modulation of fluorescent light.These tunable optical type ballasts are divided into two kinds of simulation light modulation and digital dimmings basically, and the former uses the most extensive in lighting field.The simulation light modulation needs the dimmer of a special use of supporting use, the Control current of output DC 1～10V carries out light modulation for ballast inside, general as shown in Figure 1 all big enterprises all directly integrate dimmer and ballast, and adopt passive light modulation, be that the external dimmer device all adopts passive device, dimmer is powered by ballast, obtains the DC Control current and is returning to the ballast light modulation.And a kind of dimmer only is the supporting design of tunable optical type ballast of a plate, and the dimmer of each manufacturers produce is compatible mutually with ballast like this, does not have versatility, and this gives the replacing of ballast in actual use, maintenance, and substituting makes troubles.

Summary of the invention

The utility model aims to provide a kind of dimmer that is used for tunable optical type ballast, solves the compatibling problem under the simulation light modulation of various dimmable ballasts, and independently is convenient to change upgrading mutually with ballast.

For realizing above purpose, the dimmer of the utility model design is designed to an active dimmer, comprises AC/DC change-over circuit and potentiometer circuit.Its AC/DC change-over circuit comprises AC/DC rectification and voltage division circuit and DC/DC conversion chip, and wherein AC/DC rectification and voltage division circuit connects mains supply, and DC/DC conversion chip output connects potentiometer circuit.

Above-mentioned AC/DC rectification and voltage division circuit is by the RC parallel circuits, rectifier diode, electric capacity constitutes, and the RC parallel circuits links to each other with electric capacity via rectifier diode, the rectifier diode of DC/DC conversion chip input and AC/DC rectification and voltage division circuit, electric capacity is connected on the same circuit node.

Above-mentioned potentiometer circuit comprises the LC loop, divider resistance, variable resistor, LC loop one end connects the DC/DC conversion chip, the other end and potentiometer circuit output, variable resistor is connected same circuit node, variable resistor and divider resistance configured in series, and DC/DC conversion chip dc output end is connected between divider resistance and the variable resistor.

The DC/DC conversion chip that dimmer described in the utility model adopts is LM2512.

Common mains supply obtains direct current via the AC/DC change-over circuit, and this direct current is through potentiometer circuit, and scalable obtains the direct-current control voltage of scope in DC 1～10V, flows to tunable optical type ballast and simulates light modulation.

Simultaneously the dimmer power switch is integrated into potentiometer circuit, realizes switch, the light modulation of dimmer.

The described dimmer of the utility model technology has control conveniently, and is simple in structure, the characteristics of being convenient to replace, flexible configuration in actual use is because adopt active working method, be independent of ballast, in illuminator, solved the compatibility and the upgrade problem that may exist.

Description of drawings

Fig. 1 is the simulation light modulation schematic diagram of existing tunable optical type ballast;

Fig. 2 is the fundamental diagram of dimmer described in the utility model;

Fig. 3 is the circuit diagram of dimmer described in the utility model.

Embodiment

Below in conjunction with Fig. 2 and Fig. 3, further specify the utility model, so that understand function of the present utility model, characteristics better.

Dimmer described in the utility model, working mode figure as shown in Figure 2, as we can see from the figure, the utility model is an active individual devices, just offers ballast control voltage separately.With separating on the tunable optical type ballast implementation structure,, can carry out the compatibility collocation with the tunable optical type ballast of relevant work principle so on the working method of whole illuminator simulation light modulation, have versatility.

Fig. 3 is the working circuit diagram of a specific embodiment of the utility model, whole dimmer is made of AC/DC change-over circuit E1 and potentiometer circuit E2, basic principle is, civil power AC 220V obtains low-voltage DC through the AC/DC change-over circuit, and the adjusting size via potentiometer circuit obtains required output control voltage V again _Out

Wherein the AC/DC change-over circuit is made of AC/DC rectification and voltage division circuit and DC/DC conversion chip U1, mains supply is not that direct AC/DC is converted to low-voltage DC, but earlier through RC circuit in parallel, and diode D1, D2 capacitor C 2 carry out rectification and voltage division and eliminate burr level influence in the electrical network, obtains the high voltage direct current V of a half-phase earlier _i, from pin one input DC/DC conversion chip U1, handle, obtain a low pressure direct current of voltage regulation V _oBy pin 4 outputs.What the DC/DC conversion chip adopted here is the LM2512 chip of National Semiconductor; pin 3 and 5 ground connection; pin two connects in the potentiometer circuit by protection diode D3; inductance L; the LC loop that capacitor C 3 is formed is on supervisor's 4 divider resistances and the circuit node O between the variable resistor that are connected in the potentiometer circuit.

Because V _oAlso promptly among the figure current potential of circuit node O be a steady state value by the decision of DC/DC chip, the resistance of divider resistance R3 is constant, the electric current that flows through divider resistance R3 as can be known also is a definite value.And variable resistor R2 connects with R3, and the R2 that flows through is identical with electric current on the R3, and then the potentiometer output A current potential of ordering also is the control dc voltage value V of dimmer output _OutDetermined by variable resistor R2 resistance.In fact the process of light modulation is exactly the position that changes potentiometer variable resistor contact K, changes the size of R2, thereby regulates the direct current V of output _Out, formula is:

V_{out} = \frac{V_{0}}{R_{3}} (R_{3} + R_{2}) .

Contact K in this specific embodiment in the potentiometer integrates interlock mutually with the dimmer power switch S, make the knob mode, potentiometer turns on the power switch S earlier in the turn process, the position that changes contact K along with further turn increases the R2 resistance, thereby transfer the Control current of big output, play the effect of light modulation.

Claims

1. a dimmer that is used for tunable optical type ballast is characterized in that, comprising: an AC/DC change-over circuit, and its input connects mains supply, and described circuit comprises AC/DC rectification and voltage division circuit and DC/DC conversion chip; One potentiometer circuit, input links to each other with the DC/DC conversion chip output of AC/DC change-over circuit.

2. the dimmer that is used for tunable optical type ballast as claimed in claim 1, it is characterized in that, described AC/DC rectification and voltage division circuit is by the RC parallel circuits, rectifier diode, electric capacity constitutes, the RC parallel circuits links to each other with electric capacity via rectifier diode, the rectifier diode of described DC/DC conversion chip input and AC/DC rectification and voltage division circuit, and electric capacity is connected on the same circuit node.

3. the dimmer that is used for tunable optical type ballast as claimed in claim 1, it is characterized in that, described potentiometer circuit comprises the LC loop, divider resistance, variable resistor, LC loop one end connects the DC/DC conversion chip, the other end and potentiometer circuit output, variable resistor is connected same circuit node, variable resistor and divider resistance configured in series, and described DC/DC conversion chip dc output end is connected between divider resistance and the variable resistor.

4. the dimmer that is used for tunable optical type ballast as claimed in claim 1 is characterized in that described potentiometer circuit has also been integrated the mains switch of dimmer.

5. as claim 1, the 2 described dimmers that are used for tunable optical type ballast is characterized in that described DC/DC conversion chip is LM2512.