CN102159016A

CN102159016A - Multi-gear timing dimming electronic ballast

Info

Publication number: CN102159016A
Application number: CN2011101362769A
Authority: CN
Inventors: 罗晓东
Original assignee: DEQING YIKE AINENG ELECTRONIC TECHNOLOGY Co Ltd
Current assignee: DEQING YIKE AINENG ELECTRONIC TECHNOLOGY Co Ltd
Priority date: 2011-05-25
Filing date: 2011-05-25
Publication date: 2011-08-17

Abstract

The invention discloses a multi-gear timing dimming electronic ballast, which comprises an EMI (electro-magnetic interference) filter circuit, wherein the EMI filter circuit is connected to a bridge rectifier circuit; the bridge rectifier circuit is connected to an APFC (active power factor correction) power factor correcting circuit; the APFC power factor correcting circuit is connected to a half-bridge contra-variant circuit; the half-bridge contra-variant circuit is connected to a current-limiting inductor; the current-limiting inductor is connected to a high-voltage lamp; the high-voltage lamp is connected to a firing circuit; the half-bridge contra-variant circuit is connected to a frequency control circuit; the frequency control circuit is connected to a timing dimming circuit; and the timing dimming circuit is connected to a multi-gear timing gear switch. By the using of the multi-gear timing dimming electronic ballast provided by the invention, a plurality of delay time can be set by the using of the gear switch, such as a mode 1 is preset as reducing power by delaying for 5 hours and the mode 2 is preset as reducing power by delaying for 3 hours, so the delay time can be adjusted in different seasons, thereby meeting the requirement of lighting the road as well as saving the electric energy.

Description

A kind of many gears timing dimming electric ballast

Technical field

The present invention relates to electric ballast, especially many gears timing dimming electric ballast.

Background technology

The timing dimming electric ballast is applied to road lighting and has obtained good social benefit and economic benefit, the timing dimming electric ballast is to adopt the full power illumination in the bigger period of the flow of people and Che (as 18 point-23 point), reaches the purpose of saving electric energy and reduce lighting power in the less period of (point in 23 o'clock-second day early mornings 6) people's vehicle flowrate in midnight to early morning.This timing dimming electric ballast exists a problem to be exactly, winter and summer are because the time phase difference of darkness is very big, also have than big difference the rush hour of people's activity in night, so use the time with a kind of setting in winter and summer, will make troubles to people's trip and comings and goings.

Summary of the invention

The objective of the invention is to overcome deficiency of the prior art, provide a kind of not only be applicable to summer but also the winter of being applicable to the scalable timing many gears timing dimming electric ballast.

Technical scheme of the present invention: a kind of many gears timing dimming electric ballast, comprise the EMI filter circuit, the EMI filter circuit connects bridge rectifier, bridge rectifier connects the APFC power factor correction circuit, the APFC power factor correction circuit connects half-bridge inversion circuit, half-bridge inversion circuit connects current-limiting inductance, current-limiting inductance connects high-voltage lamp, high-voltage lamp is connected with firing circuit, described half-bridge inversion circuit is connected with frequency control circuit, frequency control circuit connects timing dimming circuit, and timing dimming circuit is connected with the timing driving switch of many gears.

As preferably, described timing driving switch is made up of the hand switch of band auto-lock function.

As preferably, regularly driving switch is for being more than 2 grades or 2 grades.

Operation principle of the present invention is: input current is through the filtering of EMI filter circuit, be direct current through the bridge rectifier rectification then, pass through APFC passive power factor corrective circuit again, export the half-bridge inversion circuit use of back level altogether of a stable 400V direct voltage, voltage after half-bridge inversion circuit will be stablized through APFC, be changed to high-frequency ac voltage, behind current limit by inductance, use for high-voltage gas discharging light, in the high-voltage gas discharging light start-up course, firing circuit produces 3-4 kilovolt high pressure and lights high-voltage gas discharging light, frequency control circuit changes by the big or small control frequency that detects output current, combination by half-bridge inversion circuit and current-limiting inductance is to export a constant-power power source, the gear that timing dimming circuit is set by driving switch, calculating needs the time of time-delay to output to frequency control circuit, the control power output.

Beneficial effect of the present invention is, not only made things convenient for road lighting but also effective saves energy.

Darkness in winter early (general 17 just need to open street lighting), the words of 23 light modulations need be delayed time 5 hours, and darkness in summer evening (turning on light for 19), 23 light modulations only need time-delay 3 hours.

If there is not gear, the light modulation time unification is set at time-delay 4 hours, so in the winter time, puies forward previous hour 22 illumination of naming a person for a particular job and turns down, and people's car is also many on the road at this moment, and low-light (level) can cause current inconvenience even accidents caused easily.And the light modulation time in summer will postpone one hour, and this hour people's vehicle flowrate seldom, do not need so high brightness, cause energy waste.

The present invention can set a plurality of delay times by driving switch, is set at time-delay as pattern 1 and falls power in 5 hours, and pattern 2 is set at time-delay and fell power in 3 hours.Adjust to the time that needs time-delay in Various Seasonal like this, both made things convenient for the demand of road lighting, saved electric energy again.

Description of drawings

Fig. 1 is the theory diagram of invention.

Specific embodiments:

EMI filtered electrical routing capacitance and common mode inductance are formed, the 220V power supply is through EMI filtering, after the bridge rectifier rectification, be adjusted to stable 400V direct voltage by the APFC power factor correction circuit, being converted to high-frequency ac by half-bridge inversion circuit then uses for fluorescent tube after current limliting, half-bridge inversion circuit is made up of two field effect transistor and half-bridge drive circuit, frequency control circuit detects the electric current of half-bridge inversion circuit output, the frequency of the driving of the big or small calculation control half-bridge inversion circuit by detecting electric current, the high-frequency ac frequency of half-bridge inversion circuit output is changed thereupon in proportion, effect by current-limiting inductance makes it to keep permanent power output, multiple time-delay light-modulating mode can be set in timing dimming circuit inside, present embodiment is set two kinds of time-delay light-modulating modes: pattern 1, it is closure state that timing dimming circuit detects switch, delay time and began to export an instruction in 5 hours to frequency control circuit, control circuit is exported control signal after detecting the instruction of timing circuit, the output frequency of control half-bridge circuit raises, and through current-limiting inductance ballast output power is reduced; Pattern 2, timing dimming circuit sense switch are open-circuit condition, delay time and export an instruction after 3 hours to the frequency control circuit light modulation, and ballast power is reduced to half-power.Driving switch is a band self-lock switch, is loaded on the ballast shell, can be by artificial adjustment switch when changing season.

Claims

1. the electric ballast of gear timing dimming more than a kind, comprise the EMI filter circuit, the EMI filter circuit connects bridge rectifier, bridge rectifier connects the APFC power factor correction circuit, the APFC power factor correction circuit connects half-bridge inversion circuit, half-bridge inversion circuit connects current-limiting inductance, current-limiting inductance connects high-voltage gas discharging light, high-voltage gas discharging light is connected with firing circuit, it is characterized in that, described half-bridge inversion circuit is connected with frequency control circuit, and frequency control circuit connects timing dimming circuit, and timing dimming circuit is connected with the timing driving switch of many gears.

2. according to a kind of many gears timing dimming electric ballast of claim 1, it is characterized in that described timing driving switch is made up of the hand switch of band auto-lock function.

3. according to a kind of many gears timing dimming electric ballast of claim 1 or 2, it is characterized in that described timing driving switch is for being more than 2 grades or 2 grades.