Electronic ballast with isolated output mode

Abstract

The utility model provides an electronic ballast with an isolated output mode, which comprises a communication module and multiple circuits, and the multiple circuits comprise an EMI filter circuit, a full-bridge rectifier circuit, a power factor circuit, an inverter circuit and a lamp tube state acquisition circuit. The communication module comprises a feedback control chip and a communication interface which are communicated with each other; the EMI filter circuit, the full-bridge rectifier circuit, the power factor circuit and the inverter circuit are sequentially connected in series and sequentially communicated, the inverter circuit is connected with a transformer output circuit, and the transformer output circuit is sequentially communicated with the lamp tube state acquisition circuit; a driving chip circuit is arranged in the feedback control chip; and the driving chip circuit, the inverter circuit, the transformer output circuit and the lamp tube state acquisition circuit are sequentially communicated to form a cycle. The output end (wire) of the ballast is directly contacted with the ground, so that the product is not damaged; the human body contact ballast output end (wire) greatly reduces the personal safety problem; the reliability of the ballast is greatly enhanced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to technical field, specifically related to an electronic ballast of isolated output mode. BACKGROUND

[0002] Now electronic ballast is mostly adopt half bridge LC resonance mode, output end uses inductance L3A to realize ballast, and there is no isolation with power supply, this kind of product has no problem in ordinary lighting industry, but in ultraviolet germicidal lamp industry especially water treatment industry problem is very obvious. Output end once and water interface easily causes failure, even personal safety. SUMMARY

[0003] In view of above-mentioned defects or insufficient in prior art, the utility model provides an electronic ballast of isolated output mode to solve above-mentioned problems in prior art.

[0004] Its main technical scheme is: an electronic ballast of isolated output mode, including communication module and multiple circuits, the multiple circuits include EMI filter circuit, full bridge rectifier circuit, power factor circuit, inverter circuit and lamp tube state acquisition circuit;The communication module includes feedback control chip and communication interface that communicate with each other;The EMI filter circuit, full bridge rectifier circuit, power factor circuit and inverter circuit are sequentially connected in series, the inverter circuit is connected with transformer output circuit, and the transformer output circuit sequentially connects the lamp tube state acquisition circuit;The feedback control chip contains drive chip circuit, and the drive chip circuit, inverter circuit, transformer output circuit and lamp tube state acquisition circuit are sequentially connected in series to form a cycle.

[0005] Further, the transformer output circuit contains external germicidal lamp.

[0006] Further, the EMI filter circuit is externally connected with AC power supply, DC power supply or AC / DC dual-purpose power supply.

[0007] Further, the power factor circuit is power factor correction circuit APFC.

[0008] Further, the inverter circuit is half bridge inverter circuit, full bridge inverter or push-pull inverter circuit.

[0009] The utility model has the advantages that: ballast output end (line) directly contacts with ground, and product is no longer damaged;Human body contact ballast output end (line) greatly reduces personal safety problem;The reliability of ballast is greatly enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0010] Other features, objects, and advantages of the application will become more apparent by reference to the following detailed description of non-limiting embodiments thereof, taken in conjunction with the accompanying drawings:

[0011] Figure 1 The utility model discloses a whole structure circuit block diagram;

[0012] Figure 2 The utility model discloses EMI filter circuit, full bridge rectifier circuit, power factor circuit connection circuit diagram;

[0013] Figure 3 The utility model discloses drive chip circuit, inverter circuit, transformer output circuit and lamp tube state acquisition circuit connection circuit diagram. DETAILED DESCRIPTION

[0014] The application will be further described below in detail with reference to the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the related utility model, and not to limit the utility model. In addition, it should be noted that only the parts related to the utility model are shown in the drawings for convenience of description.

[0015] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0016] Embodiment:

[0017] An electronic ballast of isolated output mode comprises a communication module and multiple circuits, wherein the multiple circuits comprise an EMI filter circuit, a full bridge rectifier circuit, an APFC circuit, a half bridge inverter circuit and a lamp tube state acquisition circuit; the communication module comprises a feedback control chip and a communication interface which are in communication with each other; the EMI filter circuit, the full bridge rectifier circuit, the APFC circuit and the half bridge inverter circuit are sequentially connected in series; the half bridge inverter circuit is connected with a transformer output circuit; the transformer output circuit is sequentially connected with the lamp tube state acquisition circuit; the feedback control chip comprises a drive chip circuit; the drive chip circuit, the half bridge inverter circuit, the transformer output circuit and the lamp tube state acquisition circuit are sequentially connected in series to form a cycle. The transformer output circuit comprises an external germicidal lamp.

[0018] The EMI filter circuit is externally connected with an AC power supply, a DC power supply or an AC / DC dual-purpose power supply.

[0019] As Figure 2The transformer output circuit adopts a leakage inductance design. The starting process of the ultraviolet germicidal lamp requires a high-voltage pulse provided by the ballast to ignite the lamp tube. During the starting process, the leakage inductance of the transformer can suppress current surges and prevent voltage spikes from damaging circuit components such as semiconductor switching elements, capacitors, etc. An appropriate amount of leakage inductance can effectively limit the excessive starting voltage and prevent circuit overload.

[0020] Modern ultraviolet germicidal lamp ballasts are mostly electronic ballasts, usually operating at high frequencies (tens to hundreds of kilohertz). During high-frequency switching, the leakage inductance of the transformer can cause large changes in the magnetic field, which may lead to the generation of harmonics. These harmonics can pollute the power grid and affect the normal operation of other equipment. By carefully designing the leakage inductance of the transformer, the generation of harmonics can be reduced, and the quality of the power supply can be improved.

[0021] During the stable operation phase of the ultraviolet germicidal lamp, the leakage inductance of the transformer helps to limit the rapid change of current and stabilize the current flow in the ballast. An appropriate amount of leakage inductance can prevent excessive or insufficient current, ensuring that the lamp tube current is within a safe range, ensuring that the ultraviolet lamp works continuously and stably, and providing a constant ultraviolet output.

[0022] In the design of an isolated output type ballast, the input and output are completely electrically isolated through the transformer isolation component. That is, the input side and the output side are connected through the transformer isolation element.

[0023] In the design of the ballast in the ultraviolet germicidal lamp industry, using an isolated output can effectively prevent high-voltage current from being conducted from the input side to the output. This is very important to avoid the risk of electric shock, equipment damage, and electrical short circuits, especially in environments with high requirements for electrical safety (such as medical, laboratory, food processing, etc.). The isolation circuit can greatly reduce the safety hazards caused by equipment failure or electrical problems. Since the isolated output can effectively prevent high-frequency noise and electromagnetic interference (EMI) from the power supply side from entering the ultraviolet lamp tube side, it can ensure the stable operation of the ultraviolet lamp and reduce the electromagnetic interference that may be caused to other equipment, especially precision electronic equipment. Therefore, using an isolated ballast can better protect sensitive electronic equipment and ensure electromagnetic compatibility (EMC) in the environment. Isolated output can effectively prevent the influence of input voltage fluctuations, transient overvoltage, etc. on the ultraviolet lamp tube and the ballast, improving the reliability and stability of the entire system. This design can reduce the failure rate and prolong the service life of the ultraviolet germicidal lamp and the ballast during long-term operation.

[0024] The above description is merely the preferred embodiments of the present application and the technical principles used. It should be understood by those skilled in the art that the scope of the utility model involved in the present application is not limited to the technical solutions formed by the specific combinations of the technical features described above, and should also cover other technical solutions formed by any combinations of the technical features described above or their equivalent features without departing from the concept of the utility model. For example, the technical solutions formed by replacing the above features with the technical features disclosed in the present application (but not limited to) having similar functions.

Claims

1. An electronic ballast of isolated output mode, comprising a communication module and a plurality of circuits, characterized in that: The multiple circuit includes an EMI filter circuit, a full-bridge rectifier circuit, a power factor circuit, an inverter circuit and a lamp state acquisition circuit; the communication module includes a feedback control chip and a communication interface in mutual communication; the EMI filter circuit, the full-bridge rectifier circuit, the power factor circuit and the inverter circuit are sequentially connected in series; the inverter circuit is connected with a transformer output circuit; the transformer output circuit sequentially connects the lamp state acquisition circuit; the feedback control chip contains a driving chip circuit; the driving chip circuit, the inverter circuit, the transformer output circuit and the lamp state acquisition circuit are sequentially connected in series to form a cycle.

2. An electronic ballast of isolated output type according to claim 1, characterized in that: The transformer output circuit contains an external germicidal lamp.

3. An electronic ballast of isolated output mode according to claim 1, characterized in that: The EMI filter circuit is externally connected with an AC power supply, a DC power supply or an AC / DC dual-purpose power supply.

4. An electronic ballast of isolated output mode according to claim 1, characterized in that: The power factor circuit is a power factor correction circuit APFC.

5. An electronic ballast of isolated output mode according to claim 1, characterized in that: The inverter circuit is a half-bridge inverter circuit, a full-bridge inverter or a push-pull inverter circuit.

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