CN201138888Y

CN201138888Y - Electric power of high-power lamp

Info

Publication number: CN201138888Y
Application number: CNU2008200428194U
Authority: CN
Inventors: 狄晓明
Original assignee: ZHONGSHAN HUATONG LIGHT SOURCE Ltd
Current assignee: ZHONGSHAN HUATONG LIGHT SOURCE Ltd
Priority date: 2008-01-07
Filing date: 2008-01-07
Publication date: 2008-10-22
Anticipated expiration: 2018-01-07

Abstract

The utility model discloses a high-power lamp power supply. In the main technical proposal, the power supply comprises a DC voltage regulator, an electronic switching circuit, a partitioned loop controller, an asymmetric pulse oscillator, an LC resonant circuit and a light anomaly detection circuit; the DC voltage regulator is used for providing DC power; the partitioned loop controller is connected with the electronic switching circuit; the asymmetric pulse oscillator and the partitioned loop controller respectively transmit PWM pulse signals to the asymmetric pulse oscillator; the partitioned loop controller adopts the electronic switching circuit to control the output control signals transmitted to the asymmetric pulse oscillator, so as to control the oscillation of the asymmetric pulse oscillator; the asymmetric pulse oscillator is connected with the LC resonant circuit, so that the lamp is lighted and works normally; the LC resonant circuit is connected with the light anomaly detection circuit; and the light anomaly detection circuit is connected with the partitioned loop controller. The high-power lamp power supply overcomes the defects in the prior art, and has the advantages of simple structure, use of one chip, and low costs.

Description

High-power lamp power

[technical field]

The utility model relates to a kind of triggering and working power that is used for high-power fluorescent lamp, discharge lamp etc.

[background technology]

The electric ballast of fluorescent lamp employing at present, owing to be provided with special-purpose IC control chip in it, the power of output is subjected to the constraint of this IC control chip, so that the restriction fluorescent lamp can not be done is too big, general existing electric ballast can only be lower than 250 volts fluorescent lamp by keep-alive voltage.People are more and more higher to the demand of powerful fluorescent lamp at present, can not light high-power fluorescent lamp with existing electric ballast like this.The power supply of high-power fluorescent lamp has appearred lighting specially at present, but the circuit structure more complicated, and need a lot of chips to control to finish the work, cost is improved.

[utility model content]

The purpose of this utility model is provide in order to overcome the deficiencies in the prior art a kind of simple in structure, only adopts a chip, high-power lamp power that cost is low.

In order to solve the technical problem of above-mentioned existence, the utility model adopts following technical proposal:

High-power lamp power, it is characterized in that: include the direct current voltage regulator that extraneous AC power can be carried out rectification and boost, rise on-off action electronic switching circuit, cut apart cycle controller, asymmetry pulse oscillator, LC resonant circuit, lamp abnormal detection circuit, direct current voltage regulator, its output connect electronic switching circuit, asymmetry pulse oscillator, cut apart cycle controller, LC resonant circuit and for they provide DC power supply;

Cut apart the cycle controller output and connect electronic switching circuit, asymmetry pulse oscillator, cut apart cycle controller to asymmetry pulse oscillator output pwm pulse signal, cut apart cycle controller according to the power factor of fluorescent lamp by the output control signal of electronic switching circuit control to the asymmetry pulse oscillator, control the asymmetry pulse oscillator with this and vibrate;

The output of asymmetry pulse oscillator connects the LC resonant circuit; The asymmetry pulse oscillator is defeated by direct current voltage regulator by electronic switching circuit high direct voltage converts ac high-voltage to, exports to the LC resonant circuit, produces high-frequency ac voltage, is added to fluorescent tube is lighted and operate as normal;

LC resonant circuit output also is connected with the lamp abnormal detection circuit, lamp abnormal detection circuit output connects cuts apart cycle controller, the lamp abnormal detection circuit detects the fluorescent lamp operation abnormal signal, offer and cut apart cycle controller, cut apart cycle controller and make and send control command control electronic switching circuit and disconnect.

Aforesaid high-power lamp power is characterized in that: the described cycle controller of cutting apart comprises integrated package, and integrated package is L6585.

Aforesaid high-power lamp power, it is characterized in that: described electronic switching circuit is for including metal-oxide-semiconductor T1, the metal-oxide-semiconductor grid with cut apart the cycle controller output and be connected, the source electrode of metal-oxide-semiconductor is connected with the positive pole of direct current voltage regulator output with diode D10, the grounded drain of metal-oxide-semiconductor, the negative pole of diode is connected with the asymmetry pulse oscillator.

The utility model compared with prior art has following advantage: 1, the utility model makes simple in structure owing to only adopted chip piece;

2, L6585 has improved the brightness of lamp, has also reduced power consumption simultaneously, and meets relevant electric power safety and power consumption rules;

3, the characteristic of L6585IC is the half-bridge frequency of warm-up time and the duration of ignition and each working stage of can independently programming; Therefore, this monolithic IC can be used for the fluorescent tube of number of different types;

4, L6585IC implements the protection of high security to the PFC on the chip and half-bridge two parts; Except in igniting with normal work stage limits the voltage and current on the fluorescent tube, the overcurrent protection function of L6585 can also prevent that capacitive from appearing at the half-bridge part, with the reliability of further raising ballast;

5, L6585 also wants other multiple advantages, and for example, the overvoltage of PFC and feedback disconnection detection function can be closed IC, in case ballast is damaged; High linear multiplier device can be operated under the wide voltage source ballast, and total harmonic distortion (THD) is very low simultaneously.

[description of drawings]

Fig. 1 is a block diagram of the present utility model;

Fig. 2 is a circuit connection diagram of the present utility model.

[embodiment]

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

As shown in Figure 1, the utility model comprise direct current voltage regulator A, electronic switching circuit B, cut apart cycle controller C, asymmetry pulse oscillator D, LC resonant circuit E, lamp abnormal detection circuit F.

Direct current voltage regulator A can carry out rectification with extraneous AC power and boost, and its output connects electronic switching circuit B, asymmetry pulse oscillator D, cuts apart cycle controller C, LC resonant circuit E, and DC power supply is provided;

Cut apart cycle controller C output and connect electronic switching circuit B, asymmetry pulse oscillator D, cut apart the output pwm pulse signal of cycle controller C to asymmetry pulse oscillator D, electronic switching circuit B forms the PFC active filter circuit with the circuit of cutting apart cycle controller C inside, cut apart cycle controller C by break-make according to the power factor controlling electronic switching circuit B of fluorescent lamp, the output of electronic switching circuit B connects asymmetry pulse oscillator D, determine whether it works for asymmetry pulse oscillator D control signal, control asymmetry pulse oscillator D with this and vibrate; Make direct current voltage regulator A convert ac high-voltage to by the high direct voltage that electronic switching circuit B is defeated by asymmetry pulse oscillator D input, from the output output of asymmetry pulse oscillator D, the asymmetry pulse oscillator output end connects the LC resonant circuit then; Asymmetry pulse oscillator D vibration back produces alternating voltage, and alternating voltage makes LC resonant circuit E resonance, produces high-frequency ac voltage, is added to fluorescent tube is lighted and operate as normal;

LC resonant circuit E output also is connected with lamp abnormal detection circuit F; Lamp abnormal detection circuit F output connects cuts apart cycle controller C; Lamp abnormal detection circuit F detects the fluorescent lamp operation abnormal signal, offer and cut apart cycle controller C, cutting apart cycle controller C makes and sends control command, B disconnects by the control electronic switching circuit, making direct current voltage regulator A can not be the fluorescent lamp power supply by asymmetry pulse oscillator D, LC series resonant circuit E, thereby fluorescent lamp is quit work.

Lift a particular circuit configurations below and further specify the utility model, as Fig. 2, direct current voltage regulator comprises capacitor C 1, C2, C3, transformer L1,4 diode D1, the elementary winding of transformer L2.Capacitor C 1, C2, C3, transformer L1 carry out filtering to external AC power; The bridge rectifier of 4 diode D1 compositions becomes direct current with filtered AC rectification.

Electronic switching circuit B comprises metal-oxide-semiconductor T1 and diode D10, metal-oxide-semiconductor T1 grid with cut apart cycle controller C output and be connected, the source electrode of metal-oxide-semiconductor T1 is connected with the positive pole of direct current voltage regulator A output and diode D10, the grounded drain of metal-oxide-semiconductor T1, the negative pole of diode D10 is connected with asymmetry pulse oscillator D.

Asymmetry pulse oscillator D comprises the elementary winding of transformer L3 and 4 secondary winding, metal-oxide-semiconductor T2, T21, T3, T31, fast recovery diode D6, D61, D7, D71, the asymmetry pulse oscillator that resistance R 4, R41, R5, R51 form.

LC series resonant circuit E comprises the elementary winding of transformer L4, inductance L 5, capacitor C 7, C8, C9.

Lamp abnormal detection circuit F comprises secondary coil, diode D8, D9, capacitor C 10, resistance R 11, the R12 of transformer L4.

The core of cutting apart cycle controller C is integrated package U1, and the model of U1 is L6585.The power factor corrector (PFC) of L6585 integrated band half-bridge controller in a chip and driver and the logical circuit that all are relevant.(PFC is exactly the meaning of " power factor ", is mainly used to characterize the utilization ratio of electronic product to electric energy, and power factor is high more, illustrates that the utilization ratio of electric energy is high more.)

Direct current voltage regulator, cut apart cycle controller and form the PFC active filter circuit together and export to electronic switching circuit B after with AC power rectification, filtering, the direct current of PFC (DC) output voltage is input to 1 pin again after series resistance R18 and R19, series resistance R20 and R1 dividing potential drop behind diode D10.

10 pin of L6585 are used to import lamp and come off and detect and restart, will reset integrated package U1 and restart the secondary winding of 10 pin connection transformer L4 programmable time after of low-voltage.

18 pin of L6585 link to each other with the grid of metal-oxide-semiconductor T1 by resistance R 3, pfc circuit is formed the PFC active filter circuit with direct current voltage regulator in the L6585, the operating frequency of PFC active filter circuit depends on integrated package L6585 fully, can best realize that PFC is more than or equal to 0.99 power factor value, just allow the current waveform of electrical network input approach sine wave, and keep same-phase with the line voltage of importing.

R6, C11 are the current start element of L6585, connect 19 pin of L6585, an output of another termination bridge rectifier of R6.

The secondary winding of transformer L2 and diode D3 etc. are the power circuit of L6585, and the voltage of 19 pin that puts on L6585 is 15V.

(PWM a kind ofly carries out digitally coded method to analog signal level to the pwm pulse of the pin 16 of L6585, pin 17 outputs; By the use of high-resolution counter, modulated being used for of the duty ratio of square wave encoded to the level of a physical simulation signal.) produce the alternating current of near sinusoidal ripple by transformer L3 driven MOS pipe T2, T21, T3, T31; Inductance L 5, capacitor C 7 are formed the LC resonant circuit, produce high frequency voltage, and the two ends that add to fluorescent tube are lighted fluorescent tube, and after lighting, series resonance winding L 5 just plays metering function, and fluorescent tube is worked under normal voltage.Its operation principle is: the high voltage direct current inversion of direct current voltage regulator output is high-frequency ac and is used to light bulb and makes its reliably working.Operating frequency is by the resonance frequency decision of L6585, L6585 pin 16, pin 17 are connected on the elementary of pulse transformer L3, the end of the same name of the secondary output of pulse transformer L3 has guaranteed metal-oxide-semiconductor T2, T21, metal-oxide-semiconductor T3, T31 one after the other conducting, resistance R 4, R41, R5, R51 are the grid current-limiting resistances of metal-oxide-semiconductor T2, T21, T3, T31, and fast recovery diode D6, D61, D7, D71 are the reverse earial drainage diodes of metal-oxide-semiconductor T2, T21, T3, T31; Inductance L 5 is current limliting energy storage inductors of lamp, and capacitor C 7 is capacitances, and pulse transformer L3 is the driving pulse transformer of metal-oxide-semiconductor T2, T21, T3, T31.

The utility model can be used for CFL (electricity-saving lamp is compact fluorescent lamp again, be called for short CFL lamp) or T8, T4, straight-pipe fluorescent lamps such as T5, T12, is applicable to that also direct current is as power supply or resistor-type heating, luminous light source etc.

Claims

1, high-power lamp power, it is characterized in that: include the direct current voltage regulator (A) that extraneous AC power can be carried out rectification and boost, rise on-off action electronic switching circuit (B), cut apart cycle controller (C), asymmetry pulse oscillator (D), LC resonant circuit (E), lamp abnormal detection circuit (F), direct current voltage regulator (A), its output connect electronic switching circuit (B), asymmetry pulse oscillator (D), cut apart cycle controller (C), LC resonant circuit (E) and for they provide DC power supply;

Cut apart cycle controller (C) output and connect electronic switching circuit (B), asymmetry pulse oscillator (D), cut apart the output pwm pulse signal of cycle controller (C) to asymmetry pulse oscillator (D), cut apart cycle controller (C) and pass through the output control signal of electronic switching circuit (B) control, control asymmetry pulse oscillator (D) with this and vibrate to asymmetry pulse oscillator (D) according to the power factor of fluorescent lamp;

The output of asymmetry pulse oscillator (D) connects LC resonant circuit (E); Asymmetry pulse oscillator (D) is defeated by direct current voltage regulator (A) by electronic switching circuit (B) high direct voltage converts ac high-voltage to, export to LC resonant circuit (E), produce high-frequency ac voltage, be added to fluorescent tube is lighted and operate as normal;

LC resonant circuit (E) output also is connected with lamp abnormal detection circuit (F), lamp abnormal detection circuit (F) output connects cuts apart cycle controller (C), lamp abnormal detection circuit (F) detects the fluorescent lamp operation abnormal signal, offer and cut apart cycle controller (C), cut apart cycle controller (C) and make and send control command control electronic switching circuit (B) and disconnect.

2, high-power lamp power according to claim 1 is characterized in that: the described cycle controller (C) of cutting apart comprises integrated package (U1), and integrated package (U1) is L6585.

3, high-power lamp power according to claim 1, it is characterized in that: described electronic switching circuit (B) is for including metal-oxide-semiconductor (T1), metal-oxide-semiconductor (T1) grid with cut apart cycle controller (C) output and be connected, the source electrode of metal-oxide-semiconductor (T1) is connected with the positive pole of direct current voltage regulator (A) output and diode (D10), the grounded drain of metal-oxide-semiconductor (T1), the negative pole of diode (D10) is connected with asymmetry pulse oscillator (D).