CN107734740A - General-purpose double-ended LED lamp tube and its module meeting safety standards - Google Patents

Abstract

The invention discloses a kind of universal both-end LED lamp tube and its module for meeting safety standard, the universal both-end LED lamp tube module for meeting safety standard is made up of the first module and the second module, and the LED module includes：High frequency transformer TB, electric capacity, high frequency choke inductance, bidirectional triode thyristor, rectifier bridge, relay, high frequency driver and Low frequency drivers.Technical scheme provided by the invention has the advantages of universal strong, safe.

Description

General-purpose double-ended LED lamp tube and its module meeting safety standards

technical field

The invention relates to the field of LEDs, in particular to a general-purpose double-ended LED lamp tube and its module meeting safety standards.

Background technique

Using LED tubes to directly replace fluorescent tubes on traditional fluorescent lighting fixtures can achieve significant effects of energy saving and emission reduction, improvement of light efficiency, improvement of light environment, and reduction of renovation costs.

However, since ballasts on traditional fluorescent lamps usually have two types: magnetic ballasts or electronic ballasts, the working principles, circuit wiring methods, and output voltage and current of the two are completely different, especially the frequency of output voltage and current. The difference is huge. Generally, the output voltage and current of magnetic ballasts are 50/60Hz power frequency, while electronic ballasts output high-frequency voltage and current of 25KHz-80KHz.

According to the difference of the ballasts on the traditional fluorescent lamps, the existing designed and manufactured LED lamp tubes adopt two different technical solutions of inductive compatible type or electronic compatible type.

Since the double-ended LED lamp tube cannot be installed into the lamp holder at the same time, there is a risk of electric shock. Therefore, the IEC62776 standard clearly stipulates that there must be a creepage distance (≥ 2.5mm) and an electrical clearance at both ends of the lamp tube. (≥1.5mm), so that the two ends of the lamp tube are effectively electrically isolated.

In the actual direct replacement operation, except for professional electricians, it is difficult for users to distinguish the difference between electronics or inductors and the safety operating procedures. It will cause fire and personal safety accidents.

Due to the lack of generality and safety of the existing LED lamp tubes, they cannot become a commodity in circulation, thus greatly restricting the application field and popularization speed and scope of his energy-saving transformation.

Contents of the invention

The application provides a general-purpose double-ended LED lamp tube and its module meeting safety standards. It solves the problems that the technical solutions in the prior art cannot be universally used and the safety is low.

On the one hand, a general-purpose double-ended LED lamp tube and its module meeting safety standards are provided. The general-purpose double-terminal LED lamp tube module meeting the requirements of safety standards is composed of a first module and a second module. The LED The module includes: high-frequency transformer TB, capacitor, high-frequency choke inductor, bidirectional thyristor, rectifier bridge and relay, high-frequency driver and low-frequency driver; among them;

The first capacitor C1 and the second capacitor C2 are connected in series, one end of the first capacitor C1 is connected to the first metal lamp pin, the other end of the second capacitor C2 is connected to the second metal lamp pin; the other end of the second capacitor C2 is connected to One end of the fifth high-frequency choke inductor L5, the other end of the fifth high-frequency choke inductor L5 is the B output port; one end of the first capacitor C1 is also connected to one end of the fourth high-frequency choke inductor L4, the fourth high-frequency choke inductor L4 The other end of the frequency choke inductor L4 is the A output port;

The high-frequency transformer TB includes two primary windings L1, L2 and a secondary winding L3, wherein one end of the primary winding L1 is connected to the third metal lamp pin, and the other end of the primary winding L2 is connected to the fourth metal lamp pin. The other end of the primary winding L1 is connected to one end of the primary winding L2 and one end of the first switch JK1 of the relay, the other end of the first switch JK1 is connected to one end of the second switch JK2, and the other end of the second switch JK2 is the D output port; One end of the secondary winding L3 of the high-frequency transformer TB is connected to port 1 of the rectifier bridge, port 3 of the rectifier bridge is connected to the other end of the secondary winding L3, port 2 of the rectifier bridge is connected to the other end of the coil J of the relay, and the relay One end of the coil J of the relay is connected to port No. 4 of the rectifier bridge, and the fifth capacitor C5 is connected in parallel with the coil J of the relay;

One end of the bidirectional thyristor is connected to the other end of the first capacitor C1, the other end of the bidirectional thyristor is the C output port, the control end of the bidirectional thyristor is connected to the other end of the third capacitor C3, and one end of the third capacitor C3 Connect one end of the triac;

The C output port and the D output port are connected to the input end of the high-frequency driver, the A output port and the B output port are connected to the input end of the low-frequency driver, and the high-frequency driver is connected to the low-frequency driver. The positive and negative output terminals of the driver are the output terminals of the LED module.

Optionally, the LED module further includes: a piezoresistor Rv, both ends of the piezoresistor Rv are respectively connected to the first metal lamp pin and the second metal lamp pin.

Optionally, the LED module further includes: a fourth capacitor C4, both ends of the fourth capacitor C4 are respectively connected to the A output port and the B output port of the LED module.

Optionally, the number of the relays J is 1 or 2.

In the second aspect, a general-purpose double-terminal LED lamp tube meeting safety standards is provided, and the general-purpose LED lamp tube meeting safety standard requirements includes the general-purpose double-terminal LED module meeting safety standards described in the first aspect.

In the third aspect, a first module of a general-purpose LED module that meets the requirements of safety standards, the first module includes: a capacitor, an inductor, and a low-frequency driver; wherein,

The first capacitor C1 and the second capacitor C2 are connected in series, one end of the first capacitor C1 is connected to the first metal lamp pin, the other end of the second capacitor C2 is connected to the second metal lamp pin; the other end of the second capacitor C2 is connected to One end of the fifth high-frequency choke inductor L5, the other end of the fifth high-frequency choke inductor L5 is the B output port; one end of the first capacitor C1 is also connected to one end of the fourth high-frequency choke inductor L4, and the fourth high-frequency The other end of the choke inductor L4 is the A output port;

The A output port and the B output port are connected to the input end of the low frequency driver, and the positive and negative output ends of the low frequency driver are the output ends of the first module.

In the fourth aspect, there is provided a second module of a general-purpose LED module that meets the requirements of safety standards, and the second module includes: a high-frequency transformer TB, a capacitor, an inductor, a rectifier bridge, a relay, a triac and a high-frequency drive; among them,

The high-frequency transformer TB includes two primary windings L1, L2 and a secondary winding L3, wherein one end of the primary winding L1 is connected to the third metal lamp pin, and the other end of the primary winding L2 is connected to the fourth metal lamp pin. The other end of the primary winding L1 is connected to one end of the primary winding L2 and one end of the first switch JK1 of the relay, the other end of the first switch JK1 is connected to one end of the second switch JK2, and the other end of the second switch JK2 is the D output port; One end of the secondary winding L3 of the high-frequency transformer TB is connected to port 1 of the rectifier bridge, port 3 of the rectifier bridge is connected to the other end of the secondary winding L3, port 2 of the rectifier bridge is connected to the other end of the coil J of the relay, and the relay One end of the coil J of the relay is connected to port No. 4 of the rectifier bridge, and the fifth capacitor C5 is connected in parallel with the coil J of the relay; one end of the bidirectional thyristor is connected to the other end of the first capacitor C1 of the first module, and the fifth capacitor C5 is connected in parallel with the coil J of the relay; The other end of the bidirectional thyristor is the C output port, the control end of the bidirectional thyristor is connected to the other end of the third capacitor C3, and one end of the third capacitor C3 is connected to one end of the bidirectional thyristor;

The C output port and the D output port are connected to the input end of the high frequency driver, and the positive and negative output ends of the high frequency driver are the output ends of the second module.

The technical solution provided by the invention has the advantages of being able to realize two different ballasts, strong universality and high safety.

Description of drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings that need to be used in the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present invention. Those of ordinary skill in the art can also obtain other drawings based on these drawings without any creative effort.

Fig. 1a is a schematic diagram of an inductance ballast circuit of an existing fluorescent lamp;

Figure 1b is a schematic circuit diagram of an electronic ballast for a conventional fluorescent lamp;

Fig. 2 is a schematic block diagram of a general-purpose double-ended LED lamp tube meeting safety standards provided by a specific embodiment of the present invention.

Fig. 3 is an electrical schematic diagram provided by an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of an embodiment of the present invention.

Fig. 5a is a circuit diagram of replacing a magnetic ballast fluorescent lamp according to an embodiment of the present invention.

Fig. 5b is a circuit diagram of a fluorescent lamp replaced by an electronic ballast according to an embodiment of the present invention.

Fig. 5c is a circuit diagram of a direct commercial power supply according to an embodiment of the present invention.

detailed description

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Referring to Fig. 1a, it is a wiring diagram of an existing magnetic ballast fluorescent lighting fixture, K is a power switch, L is a magnetic ballast, and it also includes: a lamp holder 101, a metal lamp pin 102 of a lamp tube, a lamp cap 103 of a lamp tube, and a starter Device S, fluorescent tube FL, mains live wire L and neutral wire N.

Referring to Fig. 1b, it is a wiring diagram of a conventional electronic ballast fluorescent lighting fixture, in which the electronic ballast (E.B) 104.

Fig. 2 is a block diagram of the electrical principle of the present invention. In Fig. 2, the metal lamp pin 102 of the lamp tube introduces the AC 50/60Hz power frequency or 25KHz-80KHz high-frequency power supply on the lamp holder 101 into the automatic frequency division network 202 (G) through the fuse FS /D), when the incoming power supply signal is high-frequency, the high-frequency choke inductor L4 and the high-frequency choke inductor L5 isolate the high-frequency signal, and the automatic frequency division network 201 passes the high-frequency power supply through two ends of C and D The output is sent to the high-frequency driver 204 to drive the LED lamp group 206 of the lamp tube to work, and at this time, no current is introduced into the two ends of the low-frequency driver 203A and B.

When the power supply introduced by the lamp pin 102 is industrial frequency (C1, C2 isolates the industrial frequency signal), the automatic frequency division network 201 outputs the industrial frequency power supply to the low frequency driver 203 through both ends of A and B, and converts the industrial frequency AC power The LED lamp group 206 that drives the lamp tube with direct current works, and at this time, there is no current input to the C and D terminals of the high frequency driver 204 .

Fig. 3 is the electrical schematic diagram of the embodiment of the present invention, a general-purpose double-ended LED lamp tube module that meets safety standards, and the general-purpose LED lamp tube module that meets the requirements of safety standards consists of a first module (I) and a second module (Ⅱ) composition, the LED module includes: high-frequency transformer TB, capacitor, inductor, bidirectional thyristor, rectifier bridge, relay, high-frequency driver D.E 203 and low-frequency driver G.E 204; among them,

The first capacitor C1 and the second capacitor C2 are connected in series, one end of the first capacitor C1 is connected to the first metal lamp pin, the other end of the second capacitor C2 is connected to the second metal lamp pin; the other end of the second capacitor C2 is connected to One end of the fifth high-frequency choke inductor L5, the other end of the fifth high-frequency choke inductor L5 is the B output port; one end of the first capacitor C1 is also connected to one end of the fourth high-frequency choke inductor L4, and the fourth high-frequency The other end of the choke inductor L4 is the A output port;

The high-frequency transformer TB includes two primary windings L1, L2 and a secondary winding L3, wherein one end of the primary winding L1 is connected to the third metal lamp pin, and the other end of the primary winding L2 is connected to the fourth metal lamp pin. The other end of the primary winding L1 is connected to one end of the primary winding L2 and one end of the first switch JK1 of the relay, the other end of the first switch JK1 is connected to one end of the second switch JK2, and the other end of the second switch JK2 is the D output port; One end of the secondary winding L3 of the high-frequency transformer TB is connected to port 1 of the rectifier bridge, port 3 of the rectifier bridge is connected to the other end of the secondary winding L3, port 2 of the rectifier bridge is connected to the other end of the coil J of the relay, and the relay One end of the coil J of the relay is connected to port No. 4 of the rectifier bridge, and the fifth capacitor C5 is connected in parallel with the coil J of the relay;

One end of the bidirectional thyristor is connected to the other end of the first capacitor C1, the other end of the bidirectional thyristor is the C output port, the control end of the bidirectional thyristor is connected to the other end of the third capacitor C3, and one end of the third capacitor C3 Connect one end of the triac;

The C output port and the D output port are connected to the input end of the high-frequency driver, the A output port and the B output port are connected to the input end of the low-frequency driver, and the high-frequency driver is connected to the low-frequency driver. The positive and negative output terminals of the driver are the output terminals of the LED module.

Optionally, the LED module further includes: a piezoresistor Rv, both ends of the piezoresistor Rv are respectively connected to the first metal lamp pin and the second metal lamp pin.

Optionally, the LED module further includes: a fourth capacitor C4, both ends of the fourth capacitor C4 are respectively connected to the A output port and the B output port of the LED module.

Optionally, the number of said relays is 1 or 2.

Optionally, the LED module further includes: a high-frequency driver and a low-frequency driver, the A output port and the B output port are connected to the input end of the low-frequency driver, and the C output port is connected to the D output port. The input terminal of the frequency driver.

The following explains the principle that the above circuit complies with the safety requirements of the ICE62776 standard in the two cases of power frequency and high frequency.

For the power frequency signal, it connects the LED lamp 206 with the low-frequency driver through L4 and L5. At this time, the 2nd end, the second metal lamp pin, is suspended in the air. For the 3rd and 4th ends, the third and fourth metal lamp pins, due to Without electricity, the voltage of the first and second metal lamp pins cannot be transmitted to the third and fourth metal lamp pins, so the third and fourth metal lamp pins meet the safety requirements of the IEC62776 standard. When the third and fourth metal lamp pins When both the first and second lamps are inserted, the N wires of the third and fourth lamp pins can be connected to the second lamp pin through the tubular fuse SFS as shown in Figure 5a, so as to realize the conduction of the power frequency.

For the high-frequency signal, it connects the LED lamp 206 with the high-frequency driver through C1 and C2. At this time, if the third and fourth metal lamp pins are not connected to electricity, the switches JK1 and JK2 of the relay will not be closed. In this way, The isolation formed by the switches JK1 and JK2 is sufficient to meet the safety requirements of the ICE62776 standard. When the third and fourth metal lamp pins are inserted at the same time as the first and second metal lamp pins, the relay works and pulls in JK1 and JK2 to realize the high-frequency drive The conduction supplies power to the LED lamp 206 .

The specific embodiment of the present invention also provides a general-purpose double-ended LED lamp tube that meets safety standards, and the general-purpose LED lamp tube that meets safety standards includes the general-purpose double-ended LED module that meets safety standards provided by the first aspect .

The specific embodiment of the present invention provides a first module of a general-purpose LED module that meets the requirements of safety standards, and the first module includes: a first sub-module 202 and a low-frequency driver 203; wherein,

The first capacitor C1 and the second capacitor C2 are connected in series, one end of the first capacitor C1 is connected to the first metal lamp pin, the other end of the second capacitor C2 is connected to the second metal lamp pin; the other end of the second capacitor C2 is connected to One end of the fifth high-frequency choke inductor L5, the other end of the fifth high-frequency choke inductor L5 is the B output port; one end of the first capacitor C1 is also connected to one end of the fourth high-frequency choke inductor L4, and the fourth high-frequency The other end of the choke inductor L4 is the A output port;

The A output port and the B output port are connected to the input end of the high frequency driver, and the positive and negative output ends of the high frequency driver are the output ends of the first module.

The specific embodiment of the present invention provides a second module 201 of a general-purpose LED module that meets the requirements of safety standards, and the second module includes: a second sub-module 201 and a high-frequency driver 204, wherein,

The high-frequency transformer TB includes two primary windings L1, L2 and a secondary winding L3, wherein one end of the primary winding L1 is connected to the third metal lamp pin, and the other end of the primary winding L2 is connected to the fourth metal lamp pin. The other end of the primary winding L1 is connected to one end of the primary winding L2 and one end of the first switch JK1 of the relay, the other end of the first switch JK1 is connected to one end of the second switch JK2, and the other end of the second switch JK2 is the D output port; One end of the secondary winding L3 of the high-frequency transformer TB is connected to port 1 of the rectifier bridge, port 3 of the rectifier bridge is connected to the other end of the secondary winding L3, port 2 of the rectifier bridge is connected to the other end of the coil J of the relay, and the relay One end of the coil J of the relay is connected to the No. 4 port of the rectifier bridge, and the fifth capacitor C5 is connected in parallel with the coil J of the relay; the second module also includes: a triac, and one end of the triac is connected to the first The other end of the first capacitor C1 of a module, the other end of the bidirectional thyristor is the C output port, the control end of the bidirectional thyristor is connected to the other end of the third capacitor C3, and one end of the third capacitor C3 is connected to the bidirectional thyristor Silicon end;

The C output port and the D output port are connected to the input end of the high frequency driver, and the positive and negative output ends of the high frequency driver are the output ends of the second module.

Fig. 4 is a structural diagram of an embodiment of the present invention, including two plastic lamp holders 401, LED lamp beads 403, glass or plastic lamp tubes 404, LED lamp strips 405 and fuses, automatic frequency division network 201, high frequency driver 204, low frequency The driver 203 and the isolation circuit 205 are respectively installed on the circuit boards 402 at both ends, and the circuit boards at both ends are respectively held in the metal lamp pins 102 of the two plastic lamp holders 401 through copper pins 406 .

Figure 5a is a circuit diagram of a fluorescent tube driven by a direct replacement magnetic ballast. At this time, the starter S on the original lamp should be removed from the starter seat, and the SFS should be installed at the same position.

Fig. 5b is a circuit diagram of a fluorescent tube directly replaced by an electronic ballast.

Fig. 5c is a circuit diagram for directly connecting AC 100-277V 50/60Hz mains.

It should be noted that, for the sake of simple description, all the aforementioned method embodiments are expressed as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described action sequence. Because according to the present invention, certain steps can be carried out in other order or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification belong to preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

In the foregoing embodiments, the descriptions of each embodiment have their own emphases, and for parts not described in detail in a certain embodiment, reference may be made to relevant descriptions of other embodiments.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium can include: Flash disk, read-only memory (English: Read-Only Memory, abbreviated: ROM), random access device (English: Random Access Memory, abbreviated: RAM), magnetic disk or optical disk, etc.

The content downloading method and related equipment and systems provided by the embodiments of the present invention are described above in detail. In this paper, specific examples are used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only used to help understand the present invention. The method of the invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. In summary, the content of this specification should not be understood To limit the present invention.

Claims (7)

1. A general-purpose double-ended LED lamp tube module meeting safety standards, characterized in that the general-purpose LED module meeting the requirements of safety standards is composed of a first module and a second module, and the LED module includes: High-frequency transformer TB, capacitors, inductors, triacs, bridge rectifiers, relays, high-frequency drivers, and low-frequency drivers; among them, The first capacitor C1 and the second capacitor C2 are connected in series, one end of the first capacitor C1 is connected to the first metal lamp pin, the other end of the second capacitor C2 is connected to the second metal lamp pin; the other end of the second capacitor C2 is connected to One end of the fifth high-frequency choke inductor L5, the other end of the fifth high-frequency choke inductor L5 is the B output port; one end of the first capacitor C1 is also connected to one end of the fourth high-frequency choke inductor L4, the fourth high-frequency choke inductor L4 The other end of the frequency choke inductor L4 is the A output port; The high-frequency transformer TB includes two primary windings L1, L2 and a secondary winding L3, wherein one end of the primary winding L1 is connected to the third metal lamp pin, and the other end of the primary winding L2 is connected to the fourth metal lamp pin. The other end of the primary winding L1 is connected to one end of the primary winding L2 and one end of the first switch JK1 of the relay, the other end of the first switch JK1 is connected to one end of the second switch JK2, and the other end of the second switch JK2 is a D output port; One end of the secondary winding L3 of the high-frequency transformer TB is connected to port 1 of the rectifier bridge, port 3 of the rectifier bridge is connected to the other end of the secondary winding L3, port 2 of the rectifier bridge is connected to the other end of the coil J of the relay, and the relay One end of the coil J of the relay is connected to port No. 4 of the rectifier bridge, and the fifth capacitor C5 is connected in parallel with the coil J of the relay; One end of the bidirectional thyristor is connected to the other end of the first capacitor C1, the other end of the bidirectional thyristor is the C output port, the control end of the bidirectional thyristor is connected to the other end of the third capacitor C3, and one end of the third capacitor C3 Connect one end of the triac; The C output port and the D output port are connected to the input end of the high-frequency driver, the A output port and the B output port are connected to the input end of the low-frequency driver, and the high-frequency driver is connected to the low-frequency driver. The positive and negative output terminals of the driver are the output terminals of the LED module. 2. The LED lamp module according to claim 1, wherein the LED module further comprises: a varistor Rv, the two ends of the varistor Rv are respectively connected to the first metal lamp pin and the second metal lamp pin. light foot. 3. The LED light tube module according to claim 1, characterized in that, the LED module further comprises: a fourth capacitor C4, the two ends of the fourth capacitor C4 are respectively connected to A of the LED module. output port and B output port. 4. The LED lamp tube module according to claim 1, wherein the number of said relays J is 1 or 2. 5. A general-purpose double-ended LED lamp tube meeting safety standards, characterized in that the general-purpose double-ended LED lamp tube meeting the requirements of safety standards includes the safety standard-compliant lamp as described in any one of claims 1-4. General-purpose LED modules required. 6. A first module of a universal double-ended LED light tube module that meets safety standards, characterized in that the first module includes: a capacitor, an inductor, and a low-frequency driver; wherein, The first capacitor C1 and the second capacitor C2 are connected in series, one end of the first capacitor C1 is connected to the first metal lamp pin, the other end of the second capacitor C2 is connected to the second metal lamp pin; the other end of the second capacitor C2 is connected to One end of the fifth high-frequency choke inductor L5, the other end of the fifth high-frequency choke inductor L5 is the B output port; one end of the first capacitor C1 is also connected to one end of the fourth high-frequency choke inductor L4, and the fourth high-frequency The other end of the choke inductor L4 is the A output port; The A output port and the B output port are connected to the input end of the low frequency driver, and the positive and negative output ends of the low frequency driver are the output ends of the first module. 7. A second module of a general-purpose double-terminal LED module that meets safety standards, characterized in that the second module includes: a high-frequency transformer TB, a capacitor, an inductor, a rectifier bridge, a relay, a triac and High frequency driver; where, The high-frequency transformer TB includes two primary windings L1, L2 and a secondary winding L3, wherein one end of the primary winding L1 is connected to the third metal lamp pin, and the other end of the primary winding L2 is connected to the fourth metal lamp pin. The other end of the primary winding L1 is connected to one end of the primary winding L2 and one end of the first switch JK1 of the relay, the other end of the first switch JK1 is connected to one end of the second switch JK2, and the other end of the second switch JK2 is a D output port; One end of the secondary winding L3 of the high-frequency transformer TB is connected to port 1 of the rectifier bridge, port 3 of the rectifier bridge is connected to the other end of the secondary winding L3, port 2 of the rectifier bridge is connected to the other end of the coil J of the relay, and the relay One end of the coil J of the relay is connected to port No. 4 of the rectifier bridge, and the fifth capacitor C5 is connected in parallel with the coil J of the relay; one end of the bidirectional thyristor is connected to the other end of the first capacitor C1 of the first module, and the fifth capacitor C5 is connected in parallel with the coil J of the relay; The other end of the bidirectional thyristor is the C output port, the control end of the bidirectional thyristor is connected to the other end of the third capacitor C3, and one end of the third capacitor C3 is connected to one end of the bidirectional thyristor; The C output port and the D output port are connected to the input end of the high frequency driver, and the positive and negative output ends of the high frequency driver are the output ends of the second module.