CN201298940Y - LED light fixture driving power supply - Google Patents

Abstract

The utility model discloses a driving power supply for an LED lamp, which comprises a plurality of independently working rectifying screens, a rectifying transformer for automatically adjusting the voltage value of the output DC voltage rectified by the rectifying screen, and a constant current connected with the rectifying transformer. Control circuit; the power input ends of the plurality of rectification screens are respectively connected to the AC power supply, and the rectification screen is composed of a rectification circuit and an electrolytic capacitor connected in parallel to the output end of the rectification circuit and used for charging and discharging. The output terminals of the plurality of rectifying panels and the input terminals of the rectifying transformers are connected through a serially connected multi-circuit automatic switching switch. The utility model has the advantages of simple structure, convenient use and operation and reliable performance, and can effectively solve the practical problems of short service life and unreliable performance of the driving power supply for the existing LED lamps.

Description

Driving power supply for LED lamps

technical field

The utility model relates to a driving power supply for lamps, in particular to a driving power supply for LED lamps.

Background technique

At present, the driving power supply of the existing LED lamps is composed of a rectifier circuit connected to a 380V AC power supply in sequence, that is, a rectifier screen, a transformer circuit that adjusts the voltage of the DC voltage rectified by the rectifier circuit, and a control circuit that stabilizes the output current. Constant current control circuit. Among them, the role of the rectifier circuit is very important, it converts the alternating current into direct current output, and at the same time, an electrolytic capacitor for charging and discharging is connected in parallel on the output end of the rectifying circuit, and the charging and discharging characteristics of the electrolytic capacitor are used to make the rectified The pulsating DC voltage rectified by the circuit becomes a relatively stable DC voltage.

It is understood that the electrolytic capacitor with the highest service life in the world is a ruby produced in Japan, with a service life of about 20,000 hours, and the above-mentioned service life can only be achieved when it is used in a certain environment. However, since the LED light source has a longer service life of more than 50,000 hours, it is necessary to replace the power supply several times during the life cycle of the light source, which brings great inconvenience to users; and because some electrolytic capacitors are of poor quality, only a few hours The service life of LED lamps is shorter or shorter, so in the minds of the public, there are unstable and unreliable defects and deficiencies in LED lamps, which ultimately cause great constraints and inconvenience to the promotion and use of low-power, high-efficiency LED lamps.

Utility model content

The technical problem to be solved by the utility model is to provide a driving power supply for LED lamps, which has simple structure, convenient operation and reliable performance, and can effectively solve the problem of the service life of the existing driving power supply for LED lamps. Real problem with short and unreliable performance.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a driving power supply for LED lamps, which is characterized in that it includes a plurality of independently working rectifying screens, and adjusts the voltage value of the output DC voltage rectified by the rectifying screens a rectifier transformer, and a constant current control circuit connected with the rectifier transformer and with an adjustable current value; the power input ends of the plurality of rectifier screens are respectively connected with the AC power supply, and the rectifier screens are connected by the rectifier circuit and connected in parallel The output end of the rectification circuit is composed of electrolytic capacitors used for charging and discharging, and the output ends of the plurality of rectification screens are connected to the input ends of the rectification transformer through a series-connected multi-circuit automatic switching switch.

The number of the rectifying panels is three, and the multi-circuit automatic switching switch is a single-pole three-throw switch with automatic switching function.

The multi-circuit automatic transfer switch is composed of a single-pole multi-throw switch and a switching control unit for automatically switching the single-pole multi-throw switch.

The switching control unit is provided with a wireless communication module connected to it, and the wireless communication module is connected to a host computer for remote monitoring of the operation state of the multi-circuit automatic switching switch in a wireless communication manner.

The rectifying panel, the multi-circuit automatic switching switch, the AC transformer connected to the AC power supply, and the power compensation device connected to the AC transformer are all installed in the box transformer, and the AC transformer and the power supplies of the multiple rectifying panels The input terminals are connected; the rectifier transformer and constant current control circuit are installed in the lamp power box.

The electrolytic capacitor is a plug-in electrolytic capacitor.

Compared with the prior art, the utility model has the following advantages: 1. Simple structure, convenient processing, low cost and easy operation. 2. Reliable working performance, using multiple independently working rectifying screens, and multiple rectifying screens are connected to the rectifier transformer through a multi-circuit automatic switching switch. When one of the rectifying circuits fails, the above-mentioned multi-circuit automatic switching switch Automatically switch to the next rectification circuit to achieve the purpose of continuous and effective work, which is equivalent to providing multiple insurances for the rectification part of the LED lamp drive power supply; in actual use, the number of general rectification screens is 3, and the multi-circuit automatic switch Correspondingly, it is a single-pole three-throw switch controlled by the switching control unit. On the basis of the original rectification circuit of the LED lamp, two backup rectification circuits that can work independently are added. When one of them fails, it will automatically switch to the two backup rectification circuits. One backup circuit in the rectification circuit, and the other rectification circuit of the two backup rectification circuits continues to be used as a backup, thus greatly improving the reliability of the existing LED lamp driving power; in addition, the multi-circuit automatic switching switch adopted Easy switching and reliable action. 3. The control switching unit of the multi-circuit automatic transfer switch is connected with a wireless communication module, and the wireless communication module is connected with the upper computer that remotely monitors the action state of the multi-circuit automatic transfer switch in a wireless communication mode, thus realizing the upper position The remote monitoring and remote control functions of the machine to the multi-circuit automatic transfer switch are very easy to use and operate. 4. The electrolytic capacitors used are plug-in electrolytic capacitors, which can be replaced by plugging and unplugging. It is not only easy to replace, but also has high reliability. 5. The design is reasonable, the rectification part is separated from the existing drive power supply for LED lamps, and it is installed in the box with the AC transformer of the AC power supply and its power compensation device, so that the drive power box for LED lamps There are only two functional modules in the body, the rectifier transformer and the constant current control circuit. Therefore, in the process of using the lamp power supply, as long as the functions of the above two functional modules of the rectifier transformer and the constant current control circuit (continuously adjustable) are guaranteed, and because the rectifier transformer And the constant current control circuit has good stability and long service life, generally about 50,000 hours longer than the LED light source, so the utility model can well solve the life bottleneck problem of the existing LED lamp driving power supply, and the system reliability is greatly improved. To sum up, the utility model has the advantages of simple structure, low cost and reliable working performance, which can effectively solve the practical problems of short service life and unreliable performance of the existing driving power supply for LED lamps, has good application value, and is very helpful The promotion of LED light source in the field of lighting energy saving.

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below.

Description of drawings

Fig. 1 is the circuit schematic diagram of the utility model.

Explanation of reference signs:

1—rectifier screen; 2—rectifier transformer; 3—constant current control circuit;

4—multi-circuit automatic switch; 5—AC power supply; 6—AC transformer;

7—power compensation device; 8—box change; 9—lamp power box.

Detailed ways

As shown in Fig. 1, the utility model comprises a plurality of independently working rectifying panels 1, a rectifying transformer 2 which adjusts the voltage value of the output DC voltage rectified by the rectifying panel 1, and a rectifying transformer 2 connected with the rectifying transformer 2 and whose current value can be adjusted. Adjusted constant current control circuit 3. The power input ends of the plurality of rectifying screens 1 are respectively connected to the AC power supply 5, and the rectifying screen 1 is composed of a rectifying circuit and an electrolytic capacitor connected in parallel to the output end of the rectifying circuit and used for charging and discharging. The output terminals of the plurality of rectifying screens 1 and the input terminals of the rectifying transformer 2 are connected through a series-connected multi-circuit automatic switching switch 4 . The multi-circuit automatic transfer switch 4 is composed of a single-pole multi-throw switch and a switching control unit for automatically switching the single-pole multi-throw switch. The switching control unit is provided with a wireless communication module connected to it, and the wireless communication module is connected to a host computer that remotely monitors the operation state of the multi-circuit automatic transfer switch 4 in a wireless communication manner. The electrolytic capacitor is a plug-in electrolytic capacitor.

In this embodiment, the number of the rectifying panels 1 is three, and the multi-circuit automatic switching switch 4 is a single-pole three-throw switch with an automatic switching function.

In the actual manufacturing process, the rectifying screen 1, the multi-circuit automatic switching switch 4, the AC transformer 6 connected to the AC power supply 5, and the power compensation device 7 connected to the AC transformer 6 are all installed in the box transformer 8, The AC transformer 6 is connected to the power input ends of the plurality of rectifying screens 1 . The rectifier transformer 2 and the constant current control circuit 3 are installed in the lamp power box 9 .

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present utility model still belong to Within the scope of protection of the technical solution of the utility model.

Claims (6)

1. LED light fixture driving power, it is characterized in that: comprise a plurality of rectifier cubices that work alone (1), to the rectifier transformer of adjusting through the magnitude of voltage of rectifier cubice (1) rectifier output dc voltage (2), and with rectifier transformer (2) joins and current value is adjustable constant-current control circuit (3); The power input of described a plurality of rectifier cubice (1) joins with communication power supply (5) respectively, described rectifier cubice (1) is by rectification circuit and be attempted by on the described rectification circuit output end and the electrochemical capacitor that is used to discharge and recharge is formed, and the multiloop automatic transfer switch (4) by a serial connection between the output of described a plurality of rectifier cubices (1) and the input of rectifier transformer (2) is connected.

2. according to the described LED light fixture of claim 1 driving power, it is characterized in that: the quantity of described rectifier cubice (1) is three, and described multiloop automatic transfer switch (4) is for having the SP3T switch of automatic switching function.

3. according to claim 1 or 2 described LED light fixture driving powers, it is characterized in that: described multiloop automatic transfer switch (4) is formed by single pole multiple throw and to the switch control unit that described single pole multiple throw automaticallyes switch.

4. according to the described LED light fixture of claim 3 driving power, it is characterized in that: described switch control unit is provided with the wireless communication module that joins with it, and described wireless communication module joins with communication and the host computer that the operate condition of multiloop automatic transfer switch (4) is carried out remote monitoring.

5. according to claim 1 or 2 described LED light fixture driving powers, it is characterized in that: described rectifier cubice (1), multiloop automatic transfer switch (4), the AC transformer (6) of joining with communication power supply (5) and be installed in case with power compensating device (7) that AC transformer (6) is joined and become in (8), the power input of described AC transformer (6) and described a plurality of rectifier cubices (1) joins; Rectifier transformer (2) and constant-current control circuit (3) are installed in the lamp power casing (9).

6. according to claim 1 or 2 described LED light fixture driving powers, it is characterized in that: described electrochemical capacitor is a plug-in electrolysis electric capacity.