CN104797065B

CN104797065B - A kind of nonpolar lamp circuit

Info

Publication number: CN104797065B
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: 2018-05-01
Anticipated expiration: 2035-04-10
Also published as: CN104797065A

Abstract

The present invention discloses a kind of nonpolar lamp circuit, belong to lamps and lanterns actuation techniques field, including dimming unit and driving unit, wherein described dimming unit includes rectifying and wave-filtering Voltage stabilizing module, comparator, current-limiting resistance, a reference source, the first microcontroller and the optocoupler being sequentially connected, and the driving unit includes second singlechip, driving chip, driving transformer and the drive module being sequentially connected；First microcontroller exports the pwm signal of the different duty of 1KHZ according to different input voltages, the pwm signal is sent to second singlechip after light-coupled isolation, it is 250KHz that second singlechip, which is equipped with and can produce frequency, duty cycle is 45% waveform ceramics crystal oscillator, a hybrid waveform is produced after the addition of waveforms that the pwm signal and ceramic crystal oscillator that second singlechip sends optocoupler produce, hybrid waveform signal is sent to driving transformer after driving chip amplifies, and lights electrodeless lamp tube finally by drive circuit.

Description

A kind of nonpolar lamp circuit

Technical field

The present invention relates to a kind of nonpolar lamp circuit, belongs to lamps and lanterns actuation techniques field.

Background technology

As environmental pollution increasingly aggravates, energy saving requirement increasingly shows, and Non-polarized lamp is as new generation of lighting technology, into For current world focus of interest.With the luminous efficiency and life-span upgrading of Non-polarized lamp, plus possess power saving, it is energy saving with And the advantage of environmental protection is gradually notable, Non-polarized lamp is replaced damp curtain and is opened.Non-polarized lamp product currently on the market does not possess tune generally Light function, only has the function of on and off two.

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

The content of the invention

The object of the present invention is to provide a kind of nonpolar lamp circuit, and metal-oxide-semiconductor can be allowed to always work at optimum state, ensures nothing The service life of pole lamp.

To achieve these goals, solution of the invention is：

A kind of nonpolar lamp circuit, including dimming unit and driving unit, wherein, the dimming unit includes what is be sequentially connected Rectifying and wave-filtering Voltage stabilizing module, comparator, current-limiting resistance, a reference source, the first microcontroller and optocoupler, the driving unit are included successively Connected second singlechip, driving chip, driving transformer and drive module；The 15V voltages that auxiliary winding provides are filtered through over commutation Power after ripple Voltage stabilizing module to comparator, then 5V voltages are obtained after current-limiting resistance and a reference source partial pressure, 5V voltages are respectively First microcontroller and optocoupler are powered, and are connected after noninverting input one diode of series connection of comparator with DIM+ signal ends, DIM- Signal end is grounded；First microcontroller is according to the pwm signal of the different duty of different input voltage output 1KHZ, the PWM Signal is sent to second singlechip after light-coupled isolation, and it is 250KHz that second singlechip, which is equipped with and can produce frequency, and duty cycle is It is raw after the addition of waveforms of the ceramic crystal oscillator of 45% waveform, the pwm signal that second singlechip sends optocoupler and ceramic crystal oscillator generation A hybrid waveform is produced, hybrid waveform signal is sent to driving transformer after driving chip amplifies, will finally by drive module Electrodeless lamp tube is lighted.

Preferably, rectifier bridge, filter capacitor and voltage stabilizing that the rectifying and wave-filtering Voltage stabilizing module includes being sequentially connected integrate Chip, is further parallel with the first divider resistance and the second partial pressure electricity between voltage stabilizing integrated chip and comparator input pin in the same direction Resistance.

Preferably, the comparator uses the comparator of model LM358.

Preferably, a reference source uses a reference source of model TL431.

Preferably, first microcontroller and second singlechip use the microcontroller of model PIC12F615.

Preferably, the driving chip uses the driving chip of model IXDN602.

Above-mentioned nonpolar lamp circuit operation principle：When DIM+ signal ends and DIM- signals termination 0-10V signals, comparator The direct clamper of voltage of noninverting input adds the value of the conducting voltage of diode to DIM+（The magnitude of voltage of DIM+ and the Vf of LL4148 The sum of value, the i.e. magnitude of voltage+0.7V of DIM+）；When DIM+ signal ends and DIM- signal terminating resistors, the voltage of 15V is passed through With the first divider resistance, the second partial pressure, external potentiometer partial pressure, then by the voltage follower of comparator, realize input and The voltage follow of output, is sent to the first microcontroller, the first microcontroller is according to different input voltage output 1KHZ's by voltage The pwm signal of different duty, is exported to second singlechip by light-coupled isolation, second singlechip pass sequentially through driving chip, Driving transformer and drive module light electrodeless lamp tube, since the duty cycle of the pwm signal of optocoupler output can root DIM+ signal ends With the signals of DIM- signal ends and change, it can be achieved that metal-oxide-semiconductor is realized under the frequency of 1KHZ according to the time of different duty opens Logical and shut-off, carries out discontinuous operation, realizes the adjustment of power.

Due to adjusting power generally by the way of working frequency is changed when electronic ballast for electrodeless lamp, which makes, to be dimmed, using tradition Dimming mode, half-bridge metal-oxide-semiconductor is because work at different frequencies, drives peripheral driver circuit different because of working frequency, copper Paper tinsel cabling can produce different LCR parameters, and the driving parameter of metal-oxide-semiconductor can change a lot, and cause metal-oxide-semiconductor to be operated in Optimum state, fever can be very serious, influence the service life of product.And nonpolar lamp circuit of the present invention utilizes two kinds of different frequencies Mixing to control the break-make of metal-oxide-semiconductor to be dimmed for driving ripple, can be very good to solve the problems, such as this, allows metal-oxide-semiconductor with 1KHz's Frequency carries out intermittent work, will not produce fever phenomenon, ensure that metal-oxide-semiconductor always works at optimum state；In addition, DIM+ believes Number end and DIM- signal ends can not only connect 0-10V voltage signals, but also can connect resistance signal, moulds are dimmed using 2 kinds of mixing Formula, you can the compatible widely used 0-10V light modulating devices of in the market, and the resistive dimmers of low cost, Ke Yizhan can be used The market share of bigger is led, while reduces the stock of product category.

The present invention is described in further detail below in conjunction with drawings and the specific embodiments.

Brief description of the drawings

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

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

Fig. 3 is the drive module circuit diagram of the present embodiment.

Embodiment

As shown in Figure 1, a kind of nonpolar lamp circuit, including dimming unit and driving unit, wherein, the dimming unit includes Rectifying and wave-filtering Voltage stabilizing module, comparator Ux, current-limiting resistance R2, a reference source Q4, the first microcontroller U4 and the optocoupler U7 being sequentially connected, In the present embodiment, the rectifying and wave-filtering Voltage stabilizing module includes rectifier bridge, the filter capacitor being made of diode D1, D2, D3, D4 Is further parallel between C9A and voltage stabilizing integrated chip U5, voltage stabilizing integrated chip U5 and comparator Ux input pin in the same direction (3 foot) One divider resistance RA22 and the second divider resistance RA23.The comparator Ux uses the comparator of model LM358.The benchmark Source Q4 uses a reference source of model TL431.

As Figure 2-3, the second singlechip U2, driving chip U3, driving that the driving unit includes being sequentially connected become Depressor L7 and drive module；It is 250KHz that the second singlechip U2, which is equipped with and can produce frequency, and the waveform that duty cycle is 45% is ceramic Crystal oscillator X1, the first microcontroller U4 and second singlechip U2 use the microcontroller of model PIC12F615.The driving core Piece U3 uses the driving chip of model IXDN602.

Nonpolar lamp circuit operation principle described in the present embodiment：Rectifying and wave-filtering Voltage stabilizing module power input and auxiliary winding T3 It is connected, the 15V voltages that auxiliary winding T3 is provided, through diode D1, D2, D3, D4 rectification, after filter capacitor C9A filtering, pass through voltage stabilizing Integrated chip U5 voltage stabilizings, obtain the voltage of 15V, power to comparator Ux, after current-limiting resistance R2 current limlitings, then pass through a reference source Q4 Partial pressure, finally obtains stable 5V voltages, and 1 foot for being the first microcontroller U4 and optocoupler U7 is powered.Driving unit is by addition all the way Power supply module U1 powers, and power supply module U1 provides the voltage of 15V, the voltage of 15V is on the one hand directly provided for driving chip U3, separately On the one hand by the voltage of 15V by exporting 5V voltages after current-limiting resistance R11, power to second singlechip U2.When DIM+ signal ends When terminating 0-10V signals with DIM- signals, the noninverting input of comparator Ux（3 feet）The direct clamper of voltage add two poles to DIM+ The value of the conducting voltage of pipe DT1 (LL4148)（The sum of the magnitude of voltage of DIM+ and the Vf values of LL4148, the i.e. magnitude of voltage of DIM++ 0.7V）；When DIM+ signal ends and DIM- signal terminating resistors, by the voltage of 15V by with the first divider resistance RA22, second Partial pressure RA23, external potentiometer partial pressure, then by the voltage follower of comparator Ux (since comparator Ux is designed to voltage Follower), realize the voltage follow output and input, voltage is sent to the first microcontroller U4, the first microcontroller U4 is not according to The pwm signal of the different duty of same input voltage output 1KHZ, is denoted as PWMI, and PWMI signals pass through optocoupler U7 and isolate output Reverse pwm signal, is denoted as PWMO with PWMI（Frequency is 1KHZ）.Second singlechip U2 is produced by ceramic crystal oscillator X1 The frequency of 250KHz, duty cycle are 45% waveform, the waveform and PWMO（1KHz frequencies, duty cycle by DIM+, DIM- signal Determine）Signal averaging produce a hybrid waveform, the hybrid waveform by second singlechip U2 5,7 feet export, and waveform on the contrary, The waveform of 5,7 feet of second singlechip U2 amplifies by driving chip U3, by driving transformer L7, drives in drive module Half-bridge metal-oxide-semiconductor M3 and M4, capacitance C9 is capacitance, inductance L5 and capacitance C10, C13 resonance, produces resonance potential, will be electrodeless Fluorescent tube LAMP is lighted, since the duty cycle of PWMO can change according to the signal of DIM+, DIM-, it can be achieved that metal-oxide-semiconductor is 1KHZ's Realize and turn on and off according to the time of different duty under frequency, carry out discontinuous operation, realize the adjustment of power.

Above-described embodiment and schema and non-limiting product form of the invention and style, any technical field it is common The appropriate change or modification that technical staff does it, all should be regarded as not departing from the patent category of the present invention.

Claims

A kind of 1. nonpolar lamp circuit, it is characterised in that：Including dimming unit and driving unit, wherein, the dimming unit includes Rectifying and wave-filtering Voltage stabilizing module, comparator, current-limiting resistance, a reference source, the first microcontroller and the optocoupler being sequentially connected, the driving are single Member includes second singlechip, driving chip, driving transformer and the drive module being sequentially connected；The 15V voltages that auxiliary winding provides Power after rectifying and wave-filtering Voltage stabilizing module to comparator, then 5V voltages, 5V are obtained after current-limiting resistance and a reference source partial pressure Voltage is respectively the first microcontroller and optocoupler power supply, the noninverting input of comparator connect after a diode with DIM+ signal ends It is connected, DIM- signal ends ground connection, the first microcontroller is believed according to the PWM of the different duty of different input voltage output 1KHZ Number, the pwm signal is sent to second singlechip after light-coupled isolation, and second singlechip is equipped with and can produce frequency and be 250KHz, duty cycle are the ceramic crystal oscillator of 45% waveform, and the pwm signal and ceramic crystal oscillator that second singlechip sends optocoupler produce Addition of waveforms after produce a hybrid waveform, hybrid waveform signal is sent to driving transformer after driving chip amplifies, finally Electrodeless lamp tube is lighted by drive module；The rectifying and wave-filtering Voltage stabilizing module includes rectifier bridge, the filter capacitor being sequentially connected With voltage stabilizing integrated chip, the first divider resistance and are further parallel between voltage stabilizing integrated chip and comparator input pin in the same direction Two divider resistances.
A kind of 2. nonpolar lamp circuit as claimed in claim 1, it is characterised in that：The comparator is using model LM358's Comparator.
A kind of 3. nonpolar lamp circuit as claimed in claim 1, it is characterised in that：The a reference source is using model TL431's A reference source.
A kind of 4. nonpolar lamp circuit as claimed in claim 1, it is characterised in that：First microcontroller and second singlechip are equal Using the microcontroller of model PIC12F615.
A kind of 5. nonpolar lamp circuit as claimed in claim 1, it is characterised in that：The driving chip uses model The driving chip of IXDN602.