CN205160879U

CN205160879U - Can discern control circuit of ballast

Info

Publication number: CN205160879U
Application number: CN201520972833.4U
Authority: CN
Inventors: 许富昌; 雷超
Original assignee: Individual
Current assignee: Individual
Priority date: 2015-11-28
Filing date: 2015-11-28
Publication date: 2016-04-13
Anticipated expiration: 2025-11-28

Abstract

The utility model provides a can discern control circuit of ballast, including exchangeable transformer, electric capacity, switching diode and control switch component, the primary one end of exchangeable transformer and electric capacity concatenate back two termination power stream inputs end, the secondary coil one end of the exchangeable transformer of a switching diode termination, the cold end of exchangeable another termination of transformer secondary coil control switch component, switching diode other end connection control switch element's control foot, control switch element sets up on by control circuit, the utility model discloses can discern access mains frequency and control by control circuit's break -make, realize the effect of coming the specific circuit of break -make through the frequency of judging the access power.

Description

A kind of control circuit that can identify ballast

Technical field

The utility model relates to switching circuit field, particularly relates to a kind of control circuit that can identify ballast.

Background technology

Current illumination market use Novel LED lamp replace conventional fluorescent light fixture to become trend, but most of conventional lamp is all with electric ballast, and the common LED light fixture that market exists cannot directly be connected on ballast, otherwise light fixture or original ballast may be burnt out, therefore decision circuit is needed whether to be directly connected on civil power still with the power supply of ballast before filling lamp, ordinary consumer obviously can not directly judge, they only need the light fixture bought back directly to replace up just, so just causing two kinds of light fixtures can not be commercially general, traditional way is that electrician that please be professional carries out judgement installation, or adopt the LED lamp that energy is compatible, but light fixture method therefor mode compatible on market is all each different, compatible non-constant, can the input of accurate decision circuitry be an important link, be whether common civil power or ballast if a kind of intelligent identifying circuit can be had judge input thus start different circuit to reach compatible object, such problem just solves, but almost there is no similar or close product in the market, LED lamp replaces conventional fluorescent light fixture to be greatly limited for this reason.

Utility model content

The technical problems to be solved in the utility model is, for the above-mentioned defect of prior art, provides a kind of control circuit that can identify ballast.

The utility model solves the technical scheme that its technical problem adopts:

A kind of control circuit that can identify ballast, include inductance transformer, electric capacity, switching diode and control switch element, two termination power two inputs after primary coil one end of inductance transformer and capacitance series, secondary coil one end of switching diode one termination inductance transformer, the control pin of switching diode other end connection control switch element, the cold end of another termination control switch element of inductance transformer secondary coil, control switch element is arranged on by control circuit.

Preferably, control switch element is switch MOS pipe.

Preferably, control switch element is relay.

Preferably, control switch element is triode.

The beneficial effects of the utility model are: can identify that access power supply type is as civil power or ballast circuit, controls by the break-make of control circuit, realize by judging that access power supply type carrys out the effect of the concrete circuit of break-make.

Accompanying drawing explanation

Below in conjunction with drawings and Examples, the utility model is described in further detail:

Fig. 1 is a kind of circuit theory diagrams that can identify a kind of preferred embodiment of the control circuit of ballast;

Fig. 2 is a kind of embody rule circuit theory diagrams applying Fig. 1 preferred embodiment.

Embodiment

Below in conjunction with accompanying drawing, embodiment of the present utility model is further described.

A kind of control circuit that can identify ballast as shown in Figure 1, include inductance transformer T1, electric capacity CX2, switching diode D1 and switch MOS pipe Q2, two termination power two inputs after primary coil T1a one end of inductance transformer T1 and electric capacity CX2 are connected in series, secondary coil T1b one end of switching diode D1 mono-termination inductance transformer T1, switching diode D1 other end connecting valve metal-oxide-semiconductor Q2, the cold end of another termination switch MOS pipe of inductance transformer T1 secondary coil T1a Q2.

Circuit as shown in Figure 2, wherein high-frequency inductor L1, these string head and the tail after high voltage thin film electric capacity CX1 and current insurance silk F1 is connected in series, external power supply inputs, after T1 inductance transformer outprimary and high voltage thin film electric capacity CX2 are connected in series and high voltage thin film electric capacity CX1 connecing, high-frequency diode BD1, BD2, BD3, it is in parallel with high voltage thin film electric capacity CX1 two ends that BD4 bridge-type connects its input, cache switching diodes D2 anode is connected with the D pole of speed-sensitive switch metal-oxide-semiconductor Q1, the S pole of Q1 connects DB3, DB4, anode, the S pole of Q2, filter capacitor C1 one end, the C1 other end and cache switching diodes D2 negative electrode, LED anode, meet high-frequency diode BD2, the negative electrode of BD1, connect with cache switching diodes D2 after LED strip meets high-frequency inductor L2, the high potential pole of speed-sensitive switch metal-oxide-semiconductor Q2 is connected with LED negative electrode, cache switching diodes D1 positive pole connects the out-secondary of inductance transformer T1, the S pole of another termination Q2 of inductance transformer T1 secondary coil, cache switching diodes D1 negative electrode connects the G pole of speed-sensitive switch metal-oxide-semiconductor Q2.Power supply is input as two-wire input, decreases the quantity of input line, decreases the complexity of circuit, reduces production cost.

High-frequency inductor ballasting circuit includes high-frequency inductor L1, high voltage thin film electric capacity CX1.Wherein high-frequency inductor L1 adopts magnetic material and copper conductor coiling to form, and its inductance value can match with conventional fluorescent fluorescent tube ballast internal electrical sensibility reciprocal the object reaching Limited Current, and the size of adjusting inductance just can make circuit export different watt levels.Wherein, current insurance silk F1, high-frequency inductor L1, high voltage thin film electric capacity CX1 form power initiation firing circuit, high voltage thin film electric capacity CX1 is start-up capacitance, and it coordinates high-frequency inductor L1 to form LC resonant tank, to reach the effect starting electronics or Inductive ballast fast.

Rectification circuit is made up of four cache switching diodes BD1, BD2, BD3, BD4 and filter capacitor C1, the high-frequency ac square wave that ballast exports is rectified into direct current signal and passes through filter capacitor by it, thus driving LED is luminous, high-frequency diode improves the safety and stability of rectification circuit, also improves the practicality of integrated circuit.

Be PWM pulsewidth reduction voltage circuit 2 by control circuit, include pwm signal controller, switch MOS pipe Q1, LED load, switching diode D2 and high-frequency inductor L2, switching diode D2 anode connects the D pole of switch MOS pipe Q1, switching diode D2 negative electrode is just being connected on the power supply of rectification output, the S pole of switch MOS pipe Q1 is connected on the power-of rectification output, high-frequency inductor L2 mono-end is connected to the D pole of switching diode D2 anode and switch MOS pipe Q1, the negative electrode of another termination LED load, the anode of LED load is just connecing the power supply of rectification output, PWM controller is connected on the G pole of switch MOS pipe Q1.Work when accessing civil power or Inductive ballast during PWM pulsewidth reduction voltage circuit access low frequency.

And a kind of control circuit 1 that can identify ballast, be made up of inductance transformer T1, high voltage thin film electric capacity CX2, switching diode D1 and switch MOS pipe Q2, switch MOS pipe Q2 is control switch element, after the outprimary of inductance transformer T1 and high voltage thin film electric capacity CX2 are connected in series and high voltage thin film electric capacity CX1 connecing, switching diode D1 positive pole connects the out-secondary of inductance transformer T1, the G pole of negative electrode connecting valve metal-oxide-semiconductor Q2, switch MOS pipe Q2 one end and LED load connect, and an end is connected on rectifier circuit positive potential.

Operation principle:

A kind ofly can identify that in the control circuit 1 of ballast, inductance transformer T1 is at the circuit of below frequency 100HZ, as connect civil power or tape splicing has in the circuit of Inductive ballast inoperative, switch MOS pipe Q2 is in initial off-state, is normally worked by control circuit PWM pulsewidth reduction voltage circuit 2; At the above circuit of access frequency 100Hz, during as accessed the circuit with electric ballast, inductance transformer T1 is activated, and voltage signal is closed by switching diode D1 control switch element metal-oxide-semiconductor Q2, will by the bypass of control circuit PWM pulsewidth reduction voltage circuit 2, remaining circuit normally.Realize a kind of effect that the control circuit 1 of the ballast frequency realized by judging to access power supply carrys out the concrete circuit of break-make that can identify.

A control circuit for ballast can be identified, need whether be with ballast according to place in circuit, carry out the break-make of control section circuit, to obtain the control effects of needs.

Certainly can identify a control circuit for ballast, the position of putting according to switch and corresponding N or P ditch MOS switch, can have corresponding change.

In another preferred embodiment of the present utility model, control switch element is triode.

In another preferred embodiment of the present utility model, control switch element is relay.

As mentioned above, be only the utility model circuit embodiment, can not as restriction the utility model concrete practical range, all changes of doing according to the utility model claim and description and amendment, all in protection range of the present utility model.

Claims

1. one kind can identify the control circuit of ballast, it is characterized in that: include inductance transformer, electric capacity, switching diode and control switch element, two termination power two inputs after primary coil one end of described inductance transformer and capacitance series, secondary coil one end of described switching diode one termination inductance transformer, the described switching diode other end connects the control pin of described control switch element, the cold end of control switch element described in described another termination of inductance transformer secondary coil, described control switch element is arranged on by control circuit.

2. a kind of control circuit that can identify ballast as claimed in claim 1, is characterized in that: described control switch element is switch MOS pipe.

3. a kind of control circuit that can identify ballast as claimed in claim 1, is characterized in that: described control switch element is relay.

4. a kind of control circuit that can identify ballast as claimed in claim 1, is characterized in that: described control switch element is triode.