CN101415285B

CN101415285B - High-frequency feedback circuit

Info

Publication number: CN101415285B
Application number: CN2008102039439A
Authority: CN
Inventors: 李峰
Original assignee: SHANGHAI BAODI ELECTRIC APPLIANCES CO Ltd
Current assignee: Shanghai Baodi Electric Appliances Co., Ltd.
Priority date: 2008-12-03
Filing date: 2008-12-03
Publication date: 2012-06-27
Anticipated expiration: 2028-12-03
Also published as: CN101415285A

Abstract

The invention relates to illuminating lamp, in particular to a high frequency feedback circuit in high-power 8U, 9U, 12U and 16U energy-saving lamps used for illuminating a factory. The circuit comprises a plurality of high frequency feedback passive high power factor circuits in parallel connection. The circuit has the advantage of ensuring that each apparatus works within an allowed range and solving the problem of the high frequency factor of the high frequency feedback circuit in the high power energy-saving lamp used for illuminating the factory.

Description

High-frequency feedback circuit

Technical field

The present invention relates to the lamp & lantern that throws light on, be specifically related to a kind of high-frequency feedback circuit that is used for illumination of plant building with high-power 8U, 9U, 12U, 16U electricity-saving lamp.

Background technology

At illuminating industry, the high-power factor electronic rectifier has two kinds of high power factor circuit structures, and a kind of is the passive high-power factor circuit, and another kind is active high power factor circuit.The general bigger active high power factor circuit of employing of power, its shortcoming is that the more cost of number of elements is higher.Passive circuit generally is applied in lower-wattage such as below the 100W, its advantage is that number of elements is few, and cost is lower.Its basic principle is following: visible by Fig. 1: the 3rd electrochemical capacitor C3, the 4th electrochemical capacitor C4 contain bigger high frequency charging and discharging currents, and be higher from heating up in high-power applications, and the life-span descends a lot, (electrochemical capacitor life-span and for a short time fall from the temperature rise exponent function relation).In addition, the first film capacitor C 1, the second thin-film capacitor C2 also is operated under the high frequency current state.When high-power applications, can surpass the device allowed band.There are the application capacity problem equally in the first diode D1, the second diode D2, when high-power applications, must select device capacious, on volume and cost, can be restricted.

Summary of the invention

The objective of the invention is the weak point according to above-mentioned prior art, a kind of high-frequency feedback circuit is provided, this circuit is parallelly connected with some high frequency feedback passive high-power factor circuits, thereby has solved the deficiency of prior art.

The object of the invention realizes being accomplished by following technical scheme:

A kind of high-frequency feedback circuit comprises: an input connects the rectifier bridge of civil power, and the output of rectifier bridge connects one first circuit; Described first circuit comprises: after first electric capacity and second capacitances in series, be connected to two outputs of rectifier bridge after the 3rd electrochemical capacitor and the 3rd diode series connection back and the 4th electrochemical capacitor and the series connection of the 4th diode; The negative pole of the positive pole of the 3rd electrochemical capacitor and the 4th diode and the positive output end of rectifier bridge join, and the negative pole of the positive pole of the 3rd diode and the 4th electrochemical capacitor and the negative output terminal of rectifier bridge join; Between the first electric capacity negative pole and second capacitance cathode, connect the positive pole of first diode and the negative pole of second diode; The negative pole of first diode is connected between the 4th electrochemical capacitor positive pole and the 4th diode cathode, and the positive pole of second diode is connected between the 3rd electrochemical capacitor negative pole and the 3rd diode cathode; Two outputs at rectifier bridge connect first switch and second switch respectively, between first switch and second switch, connect an end of first illuminating lamp, and the other end of first illuminating lamp is connected between first electric capacity and second electric capacity; It is characterized in that also comprising: N the loop identical with first circuit; A described N loop is parallelly connected with first circuit; Described N is at least two.

Advantage of the present invention is, makes each device be operated in the scope that device allows, well solved the high-frequency feedback circuit at illumination of plant building with high-power energy-saving lamp high-frequency factor problem.

Description of drawings

Fig. 1 is prior art medium-high frequency feedback passive high-power factor circuit figure;

Fig. 2 is a circuit diagram of the present invention;

Embodiment

Through embodiment characteristic of the present invention and other correlated characteristic are done further explain below in conjunction with accompanying drawing, so that technical staff's of the same trade understanding:

Visible by Fig. 2: as to the present invention includes: an input connects the rectifier bridge of civil power, and the output of rectifier bridge connects one first circuit; Described first circuit comprises: two outputs that are connected to rectifier bridge after first capacitor C 1 and second capacitor C, 2 series connection backs, the 3rd electrochemical capacitor C3 and the 3rd diode D3 series connection back and the 4th electrochemical capacitor C4 and the 4th diode D4 series connection; The negative pole of the positive pole of the 3rd electrochemical capacitor C3 and the 4th diode D4 and the positive output end of rectifier bridge join, and the negative pole of the positive pole of the 3rd diode D3 and the 4th electrochemical capacitor C4 and the negative output terminal of rectifier bridge join; Between first capacitor C, 1 negative pole and second capacitor C, 2 positive poles, connect the positive pole of the first diode D1 and the negative pole of the second diode D2; The negative pole of the first diode D1 is connected between the 4th electrochemical capacitor C4 positive pole and the 4th diode D4 positive pole, and the positive pole of the second diode D2 is connected between the 3rd electrochemical capacitor C3 negative pole and the 3rd diode D3 negative pole; Two outputs at rectifier bridge connect first K switch 1 and second switch K2 respectively, between first K switch 1 and second switch K2, connect the end of the first illuminating lamp Z1, and the other end of the first illuminating lamp Z1 is connected between first capacitor C 1 and second capacitor C 2; Also comprise: two loops identical with first circuit, these two loops are parallelly connected with first circuit.

The reason that the high frequency feedback high power factor circuit can not be applied on the above circuit of 100W is: element (mainly the referring to capacitive element) life-span that mainly is cheapness is low, if the too high and active cost of special price is similar.At the high-power energy-saving lamp that illumination of plant building is used, its power generally more than 120W, can only adopt passive scheme for reducing cost, and will solve the capacitive element life problems for this reason.The present invention shares electric current through a plurality of elements, and the electric current that each element flows through has solved the capacitive element life problems well in the way of device allowed band.

Factory building is with belonging to a plurality of headlight pooled applications on the big contribution electricity-saving lamp structure; The C3 electrochemical capacitor that replaces Fig. 1 through (as shown in Figure 2) C3, C7, three electrochemical capacitors of C11 of the present invention; C4, C8, three electrochemical capacitors of C12 replace the C4 among Fig. 1, and C1, C5, C9 replace the C1 among Fig. 1, and C2, C6, C10 replace the C2 among Fig. 1; D9, D5, D1 replace the D1 among Fig. 1; D10, D6, D2 diode replace D2 diode among Fig. 1, make each device be operated in the scope that device allows, well solved the high-frequency feedback circuit at illumination of plant building with high-power energy-saving lamp high-frequency factor problem.

Obviously those skilled in the art can see Fig. 2 that from present embodiment the shunt circuit can set a plurality ofly as required, for example 4,5, perhaps 10, even more, repeat no more at this.

Claims

1. a high-frequency feedback circuit comprises: the rectifier bridge of an input connection civil power, one first circuit of output connection of rectifier bridge; Described first circuit comprises: after first electric capacity and second capacitances in series, be connected to two outputs of rectifier bridge after the 3rd electrochemical capacitor and the 3rd diode series connection back and the 4th electrochemical capacitor and the series connection of the 4th diode; The negative pole of the positive pole of the 3rd electrochemical capacitor and the 4th diode and the positive output end of rectifier bridge join, and the negative pole of the positive pole of the 3rd diode and the 4th electrochemical capacitor and the negative output terminal of rectifier bridge join; Between the first electric capacity negative pole and second capacitance cathode, connect the positive pole of first diode and the negative pole of second diode; The negative pole of first diode is connected between the 4th electrochemical capacitor positive pole and the 4th diode cathode, and the positive pole of second diode is connected between the 3rd electrochemical capacitor negative pole and the 3rd diode cathode; Two outputs at rectifier bridge connect first switch and second switch respectively, between first switch and second switch, connect an end of first illuminating lamp, and the other end of first illuminating lamp is connected between first electric capacity and second electric capacity; It is characterized in that also comprising: N the loop identical with first circuit; A described N loop is parallelly connected with first circuit; Described N is at least two.

2. high-frequency feedback circuit according to claim 1 is characterized in that shunt circuit number N is at most 10.