CN104797065A

CN104797065A - Electrodeless lamp circuit

Info

Publication number: CN104797065A
Application number: CN201510168616.4A
Authority: CN
Inventors: 许剑钢
Original assignee: ZHEJIANG YUGUANG VACUUM ELECTRIC CO Ltd
Current assignee: ZHEJIANG YUGUANG VACUUM ELECTRIC CO Ltd
Priority date: 2015-04-10
Filing date: 2015-04-10
Publication date: 2015-07-22
Anticipated expiration: 2035-04-10
Also published as: CN104797065B

Abstract

The invention discloses an electrodeless lamp circuit and belongs to the technical field of lamp driving. The electrodeless lamp circuit comprises a dimming unit and a driving unit. The dimming unit comprises a rectifying filtering voltage-regulating module, a comparator, a current-limiting resistor, a reference source, a first single-chip microcomputer and an optical coupler connected in order. The driving unit comprises a second single-chip microcomputer, a driving chip, a driving transformer and a driving module connected in order. The first single-chip microcomputer outputs 1KHZ PWM (pulse width modulation) signals different in duty cycle according to different input voltages; the PWM signals isolated by the optical coupler are sent to the second single-chip microcomputer; the second single-chip microcomputer is provided with a waveform ceramic resonator which can generate the frequency of 250KHZ and which has 45% duty cycle; the second single-chip microcomputer superposes the PWM signals sent by the optical coupler and a waveform generated by the waveform ceramic resonator to generate a mixed waveform; a mixed waveform signal amplified by the driving chip is sent to the driving transformer; finally, the driving circuit turns on an electrodeless lamp tube.

Description

A kind of nonpolar lamp circuit

Technical field

The present invention relates to a kind of nonpolar lamp circuit, belong to light fixture Driving technique field.

Background technology

Along with environmental pollution increases the weight of day by day, energy-conservation requirement day by day manifests, and Non-polarized lamp is as lighting technology of new generation, becomes the focus that current world is paid close attention to.Along with luminous efficiency and the life-span upgrading of Non-polarized lamp, add possess power saving, energy-conservation and environmental protection advantage remarkable gradually, Non-polarized lamp is replaced damp curtain and is opened.Non-polarized lamp product in the market does not generally possess dimming function, only has out and closes two functions.

In view of this, the present inventor studies this, and develop a kind of nonpolar lamp circuit specially, this case produces thus.

Summary of the invention

The object of this invention is to provide a kind of nonpolar lamp circuit, metal-oxide-semiconductor can be allowed always to be operated in optimum state, ensure the useful life of Non-polarized lamp.

To achieve these goals, solution of the present invention is:

A kind of nonpolar lamp circuit, comprise dimming unit and driver element, wherein, described dimming unit comprises the rectifying and wave-filtering Voltage stabilizing module, comparator, current-limiting resistance, a reference source, the first single-chip microcomputer and the optocoupler that are connected successively, and described driver element comprises the second singlechip, driving chip, driving transformer and the driver module that are connected successively; The 15V voltage that auxiliary winding provides is powered to comparator after rectifying and wave-filtering Voltage stabilizing module, 5V voltage is obtained again after current-limiting resistance and a reference source dividing potential drop, 5V voltage is respectively the first single-chip microcomputer and optocoupler is powered, the input in the same way of comparator is connected after a diode and is connected with DIM+ signal end, DIM-signal end ground connection; First single-chip microcomputer exports the pwm signal of the different duty of 1KHZ according to different input voltages, described pwm signal sends to second singlechip after light-coupled isolation, second singlechip is provided with, and to produce frequency be 250KHz, duty ratio is the ceramic crystal oscillator of 45% waveform, a hybrid waveform is produced after the pwm signal that optocoupler sends by second singlechip and the addition of waveforms that ceramic crystal oscillator produces, hybrid waveform signal sends to driving transformer after driving chip amplifies, and is lighted by electrodeless lamp tube finally by drive circuit.

As preferably, described rectifying and wave-filtering Voltage stabilizing module comprises the rectifier bridge, filter capacitor and the voltage stabilizing integrated chip that are connected successively, and voltage stabilizing integrated chip and comparator are parallel with the first divider resistance and the second divider resistance in the same way further between input pin.

As preferably, described comparator adopts model to be the comparator of LM358.

As preferably, described a reference source adopts model to be a reference source of TL431.

As preferably, described first single-chip microcomputer and second singlechip all adopt model to be the single-chip microcomputer of PIC12F615.

As preferably, described driving chip adopts model to be the driving chip of IXDN602.

Above-mentioned nonpolar lamp circuit operation principle: when DIM+ signal end and DIM-signal termination 0-10V signal, the direct clamper of voltage of the input in the same way of comparator adds the value (magnitude of voltage of DIM+ and the Vf value sum of LL4148, the i.e. magnitude of voltage+0.7V of DIM+) of the conducting voltage of diode to DIM+, when DIM+ signal end and DIM-signal end connecting resistance, the voltage of 15V is passed through and the first divider resistance, second dividing potential drop, external potentiometer dividing potential drop, then by the voltage follower of comparator, realize the voltage follow of input and output, voltage is sent to the first single-chip microcomputer, first single-chip microcomputer exports the pwm signal of the different duty of 1KHZ according to different input voltages, second singlechip is exported to by light-coupled isolation, second singlechip passes through driving chip successively, electrodeless lamp tube lighted by driving transformer and drive circuit, change due to the duty ratio meeting root DIM+ signal end of the pwm signal of optocoupler output and the signal of DIM-signal end, metal-oxide-semiconductor can be realized realize turning on and off according to the time of different duty under the frequency of 1KHZ, carry out discontinuous operation, realize the adjustment of power.

Modulating Power is carried out owing to generally adopting the mode changing operating frequency when electronic ballast for electrodeless lamp makes light modulation, adopt traditional dimming mode, half-bridge metal-oxide-semiconductor is because work at different frequencies, driving peripheral driver circuit can be different because of operating frequency, Copper Foil cabling can produce different LCR parameters, and the driving parameter of metal-oxide-semiconductor can change a lot, and causes metal-oxide-semiconductor not to be operated in optimum state, heating can be very serious, affects the life-span of product.And nonpolar lamp circuit of the present invention utilizes two kinds of different frequencies to drive the mixing of ripple to carry out light modulation to the break-make controlling metal-oxide-semiconductor, can well address this problem, metal-oxide-semiconductor is allowed to carry out intermittent work with the frequency of 1KHz, can not fever phenomenon be produced, ensure that metal-oxide-semiconductor is operated in optimum state always; In addition, DIM+ signal end both can be connected 0-10V voltage signal with DIM-signal end, again can contact resistance signal, 2 kinds are adopted to mix light-modulating mode, get final product widely used 0-10V light modulating device on compatible market, the resistive dimmers of low cost can be used again, the larger market share can be captured, reduce the stock of product category simultaneously.

Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail.

Accompanying drawing explanation

Fig. 1 is the dimming unit circuit theory diagrams of the present embodiment;

Fig. 2 is the second singlechip of the present embodiment, driving chip and supply module schematic diagram;

Fig. 3 is the driver module circuit theory diagrams of the present embodiment.

Embodiment

As shown in Figure 1, a kind of nonpolar lamp circuit, comprise dimming unit and driver element, wherein, described dimming unit comprises the rectifying and wave-filtering Voltage stabilizing module be connected successively, comparator Ux, current-limiting resistance R2, a reference source Q4, first single-chip microcomputer U4 and optocoupler U7, in the present embodiment, described rectifying and wave-filtering Voltage stabilizing module comprises by diode D1, D2, D3, the rectifier bridge of D4 composition, filter capacitor C9A and voltage stabilizing integrated chip U5, voltage stabilizing integrated chip U5 and comparator Ux is parallel with the first divider resistance RA22 and the second divider resistance RA23 between input pin (3 pin) in the same way further.Described comparator Ux adopts model to be the comparator of LM358.Described a reference source Q4 adopts model to be a reference source of TL431.

As Figure 2-3, described driver element comprises the second singlechip U2, driving chip U3, driving transformer L7 and the driver module that are connected successively; Described second singlechip U2 is provided with, and to produce frequency be 250KHz, and duty ratio is that the waveform pottery crystal oscillator X1 of 45%, described first single-chip microcomputer U4 and second singlechip U2 all adopt model to be the single-chip microcomputer of PIC12F615.Described driving chip U3 adopts model to be the driving chip of IXDN602.

Nonpolar lamp circuit operation principle described in the present embodiment: rectifying and wave-filtering Voltage stabilizing module power input is connected with auxiliary winding T3, the 15V voltage that auxiliary winding T3 provides, through diode D1, D2, D3, D4 rectification, after filter capacitor C9A filtering, by voltage stabilizing integrated chip U5 voltage stabilizing, obtain the voltage of 15V, power to comparator Ux, after current-limiting resistance R2 current limliting, then by a reference source Q4 dividing potential drop, finally obtaining stable 5V voltage, is that 1 pin of the first single-chip microcomputer U4 and optocoupler U7 is powered.Driver element is powered by an other road supply module U1, supply module U1 provides the voltage of 15V, on the one hand directly provide the voltage of 15V for driving chip U3, on the other hand by the voltage of 15V by exporting 5V voltage after current-limiting resistance R11, power to second singlechip U2.When DIM+ signal end and DIM-signal termination 0-10V signal, the direct clamper of voltage of the input in the same way (3 pin) of comparator Ux adds the value (magnitude of voltage of DIM+ and the Vf value sum of LL4148, the i.e. magnitude of voltage+0.7V of DIM+) of the conducting voltage of diode DT1 (LL4148) to DIM+, when DIM+ signal end and DIM-signal end connecting resistance, the voltage of 15V is passed through and the first divider resistance RA22, second dividing potential drop RA23, external potentiometer dividing potential drop, then by the voltage follower (because comparator Ux is designed to voltage follower) of comparator Ux, realize the voltage follow of input and output, voltage is sent to the first single-chip microcomputer U4, first single-chip microcomputer U4 exports the pwm signal of the different duty of 1KHZ according to different input voltages, be designated as PWMI, PWMI signal is by optocoupler U7 isolation and amplifier and the reverse pwm signal of PWMI, being designated as PWMO(frequency is 1KHZ).Second singlechip U2 is by ceramic crystal oscillator X1, produce the frequency of 250KHz, duty ratio is the waveform of 45%, this waveform and PWMO(1KHz frequency, duty ratio is by DIM+, the signal deciding of DIM-) Signal averaging produces a hybrid waveform, described hybrid waveform is by 5 of second singlechip U2, 7 pin export, and waveform is contrary, 5 of second singlechip U2, the waveform of 7 pin amplifies through driving chip U3, by driving transformer L7, drive half-bridge metal-oxide-semiconductor M3 and M4 in driver module, electric capacity C9 is capacitance, inductance L 5 and electric capacity C10, C13 resonance, produce resonance potential, electrodeless lamp tube LAMP is lighted, because the duty ratio of PWMO can according to DIM+, the signal of DIM-and changing, metal-oxide-semiconductor can be realized realize turning on and off according to the time of different duty under the frequency of 1KHZ, carry out discontinuous operation, realize the adjustment of power.

Above-described embodiment and graphic and non-limiting product form of the present invention and style, any person of an ordinary skill in the technical field, to its suitable change done or modification, all should be considered as not departing from patent category of the present invention.

Claims

1. a nonpolar lamp circuit, it is characterized in that: comprise dimming unit and driver element, wherein, described dimming unit comprises the rectifying and wave-filtering Voltage stabilizing module, comparator, current-limiting resistance, a reference source, the first single-chip microcomputer and the optocoupler that are connected successively, and described driver element comprises the second singlechip, driving chip, driving transformer and the driver module that are connected successively, the 15V voltage that auxiliary winding provides is powered to comparator after rectifying and wave-filtering Voltage stabilizing module, 5V voltage is obtained again after current-limiting resistance and a reference source dividing potential drop, 5V voltage is respectively the first single-chip microcomputer and optocoupler is powered, the input in the same way of comparator is connected after a diode and is connected with DIM+ signal end, DIM-signal end ground connection, first single-chip microcomputer exports the pwm signal of the different duty of 1KHZ according to different input voltages, described pwm signal sends to second singlechip after light-coupled isolation, second singlechip is provided with, and to produce frequency be 250KHz, duty ratio is the ceramic crystal oscillator of 45% waveform, a hybrid waveform is produced after the pwm signal that optocoupler sends by second singlechip and the addition of waveforms that ceramic crystal oscillator produces, hybrid waveform signal sends to driving transformer after driving chip amplifies, finally by drive circuit, electrodeless lamp tube is lighted.

2. a kind of nonpolar lamp circuit as claimed in claim 1, it is characterized in that: described rectifying and wave-filtering Voltage stabilizing module comprises the rectifier bridge, filter capacitor and the voltage stabilizing integrated chip that are connected successively, and voltage stabilizing integrated chip and comparator are parallel with the first divider resistance and the second divider resistance in the same way further between input pin.

3. a kind of nonpolar lamp circuit as claimed in claim 1, is characterized in that: described comparator adopts model to be the comparator of LM358.

4. a kind of nonpolar lamp circuit as claimed in claim 1, is characterized in that: described a reference source adopts model to be a reference source of TL431.

5. a kind of nonpolar lamp circuit as claimed in claim 1, is characterized in that: described first single-chip microcomputer and second singlechip all adopt model to be the single-chip microcomputer of PIC12F615.

6. a kind of nonpolar lamp circuit as claimed in claim 1, is characterized in that: described driving chip adopts model to be the driving chip of IXDN602.