CN114513873A - Electronic ballast - Google Patents

Electronic ballast Download PDF

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Publication number
CN114513873A
CN114513873A CN202011288340.0A CN202011288340A CN114513873A CN 114513873 A CN114513873 A CN 114513873A CN 202011288340 A CN202011288340 A CN 202011288340A CN 114513873 A CN114513873 A CN 114513873A
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CN
China
Prior art keywords
pin
diode
inductor
capacitor
alternating current
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202011288340.0A
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Chinese (zh)
Inventor
杜龙彬
郭健
李昌骏
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Golden Scorpion Co ltd
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Golden Scorpion Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by Golden Scorpion Co ltd filed Critical Golden Scorpion Co ltd
Priority to CN202011288340.0A priority Critical patent/CN114513873A/en
Publication of CN114513873A publication Critical patent/CN114513873A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/26—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc
    • H05B41/28—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters
    • H05B41/282—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices
    • H05B41/2825—Circuit arrangements in which the lamp is fed by power derived from dc by means of a converter, e.g. by high-voltage dc using static converters with semiconductor devices by means of a bridge converter in the final stage

Abstract

The invention relates to an electronic ballast, the technical problem solved is that the wiring is complicated, input the line is thick, through adopting the said electronic ballast to include the three-phase alternating current input end, the rectification unit connected with three-phase alternating current input end, the rectification unit connects the bridge circuit unit used for power factor correction as the rectifier output; the technical scheme that the alternating current input end is connected with three phase branches of three-phase alternating current better solves the problem and can be used in electronic ballasting.

Description

Electronic ballast
Technical Field
The invention relates to the field of electronic ballasts, in particular to an electronic ballast.
Background
An Electronic ballast (Electronic ballast), which is a kind of ballast, refers to an Electronic device that uses Electronic technology to drive an electric light source to generate required illumination. Corresponding to this is an inductive ballast (or ballast). Modern fluorescent lamps are increasingly provided with electronic ballasts, which are light and small, and even can integrate the electronic ballasts with lamp tubes and the like, and meanwhile, the electronic ballasts can have the function of a starter, so that the independent starter can be omitted. The electronic ballast can also have more functions, such as improving or eliminating the flickering phenomenon of the fluorescent lamp by increasing the current frequency or the current waveform (such as changing the current waveform into a square wave); the fluorescent lamp can use a direct current power supply through a power supply inversion process. Some of the disadvantages of conventional inductive rectifiers are making them being replaced by increasingly sophisticated electronic ballasts.
The existing electronic ballast has the problems that wiring is troublesome, and a very thick zero line and live wire are needed to be used due to high current. The invention provides an electronic ballast, which uses three-phase alternating current input and is connected with a full-bridge circuit or a half-bridge circuit after rectification, can be matched with the current environment of agriculture and the like, namely the three-phase power using environment, and solves the technical problem.
Disclosure of Invention
The invention aims to solve the technical problems of complex wiring and thick input line in the prior art. A new electronic ballast is provided, which has the characteristics of simpler and more convenient wiring, and no need of using a thick input line, thereby reducing construction and materials.
In order to solve the technical problems, the technical scheme is as follows:
an electronic ballast comprises a three-phase alternating current input end and a rectifying unit connected with the three-phase alternating current input end, wherein the rectifying unit is connected with a bridge circuit unit for power factor correction and used as the output of an electronic rectifier; the alternating current input end is connected with three phase branches of three-phase alternating current.
The working principle of the invention is as follows: the invention is not suitable for traditional two-phase alternating current and is suitable for the condition that the environments such as agriculture and the like are all three-phase electricity. The existing electronic ballast has two input ends, which are troublesome in wiring, and needs to use a thick zero line live wire due to large current. The invention adopts the one-to-one connection of the three-phase alternating current input end and the three-phase alternating current, and does not need to arrange extra cables. Meanwhile, the voltage of the three-phase ballast after rectification is different from that of the two phases, and the output voltage of the three-phase electronic ballast is basically direct current, so that a large-specification point-discharge capacitor is not needed, the power factor of the three-phase electronic ballast can meet the standard of more than 0.95.
In the above scheme, for optimization, the bridge circuit unit is a full bridge circuit unit or a half bridge circuit unit.
Furthermore, the front section of the rectifying unit is connected with a filtering unit.
Furthermore, the filtering unit is composed of an inductor L1, an inductor L2, an inductor L3, a capacitor CA1, a capacitor CA2 and a capacitor CA 3; the first-phase alternating current input end of the three-phase alternating current input ends is connected with the inductor L1, the second-phase alternating current input end is connected with the inductor L2, and the third-phase alternating current input end is connected with the inductor L3; the capacitor CA1 and the capacitor CA2 are connected in parallel between the 2 nd end of the inductor L1 and the 2 nd end of the inductor L2, and the capacitor CA3 is connected between the 2 nd end of the inductor L3 and the 2 nd end of the inductor L2.
Further, the rectifying unit is composed of a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, and a diode D6; one end of the capacitor CA2, one end of the capacitor CA2 and the 2 nd end of the inductor L1 are connected to V through a forward diode D1DCA voltage terminal connected to the GND terminal through a reverse diode D4;
the other end of the capacitor CA2, the other end of the capacitor CA2, one end of the capacitor CA3 and the 2 nd end of the inductor L2 are connected to V through a forward diode D2DCA voltage terminal connected to the GND terminal through a reverse diode D5;
the 2 nd ends of the meter inductors L3 at the other ends of the capacitors CA3 are connected to V through forward diodes D3DCThe voltage terminal is connected to the GND terminal through a reverse diode D6.
Further, the half-bridge circuit unit comprises a pin 1 connection V of a p-type MOSFETBA2 nd pin of the voltage end is connected with the power amplifier and a1 st pin of the N-type MOSFET, and a3 rd pin of the voltage end is connected with the time-sharing driving unit; the time-sharing driving unit is connected with the level conversion circuit unit; the level conversion circuit unit is connected with the voltage stabilizing module which is connected with the voltage VDCA voltage terminal.
Further, the time-sharing driving unit comprises an OUTPUT end connected with a3 rd pin of the p-type MOSFET; the OUTPUT end is connected with the 2 nd pin P2 of the PMOS tube and the MN of the NMOS tube4No. 1 foot、NMOS tube MN3No. 1 foot、NMOS tube MN2A1 st pin and a2 nd pin of a PMOS pipe P1; the 3 rd pin of the PMOS pipe P1 is connected with an NMOS pipe MN1A No. 1 pin and a resistor R5, the other end of the resistor R5 is connected to a No. 1 pin and V of a PMOS tube P1BVoltage terminal, diode DZ1An anode, a resistor R6 and a1 st pin of a PMOS tube P2;
diode DZ1Cathode-connected diode DZ2The other end of the resistor R6 is connected with the 3 rd pin of the p-type MOSFET;
NMOS tube MN4No. 2, NMOS tube MN3No. 2 pin NMOS tube MN2No. 2 pin NMOS tube MN1The No. 2 pin is respectively connected to the GND end through a resistor R4, a resistor R3, a resistor R2 and a resistor R1, and the NMOS tube MN4No. 3, NMOS transistor MN3No. 3, NMOS transistor MN2No. 3, NMOS transistor MN1The 3 rd pin is respectively connected with clock control signals n4, n3, n2 and n1 which form time-sharing control.
The invention has the beneficial effects that: the invention is more simple and convenient for wiring in industrial and agricultural use, and does not need to use a thick input line, thereby reducing the cost of construction, materials and the like. The rectified voltage is different from the rectified voltage of two phases, and the output voltage of the three-phase electronic ballast is basically direct current, so that the power factor of the three-phase electronic ballast can meet >0.95 without using a large-specification dot-discharge capacitor.
Drawings
The invention is further illustrated with reference to the following figures and examples.
Fig. 1, schematic diagram 1 of an electronic ballast in embodiment 1.
Fig. 2 is a schematic diagram of an output of the rectifying unit in embodiment 1.
Fig. 3, a graph of luminous flux test data in example 1.
Fig. 4 is a schematic diagram of a half-bridge circuit unit in embodiment 1.
Fig. 5 is a schematic view of a time-sharing driving unit in embodiment 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
The present embodiment provides an electronic ballast, as shown in fig. 1, the electronic ballast includes a three-phase ac input terminal, a rectifying unit connected to the three-phase ac input terminal, the rectifying unit being connected to a bridge circuit unit for power factor correction as an electronic rectifier output; the alternating current input end is connected with three phase branches of three-phase alternating current.
The embodiment is not suitable for traditional two-phase alternating current and is suitable for the situation that the environments such as agriculture and the like are all three-phase electricity. The existing electronic ballast has two input ends, which are troublesome in wiring, and needs to use a thick zero line live wire due to large current. The invention adopts the one-to-one connection of the three-phase alternating current input end and the three-phase alternating current, and does not need to arrange extra cables. Meanwhile, the voltage of the three-phase ballast after rectification is different from that of the two phases, and the output voltage of the three-phase electronic ballast is basically direct current, so that a large-specification point-discharge capacitor is not needed, the power factor of the three-phase electronic ballast can meet the standard of more than 0.95.
Specifically, the bridge circuit unit is a full bridge circuit unit or a half bridge circuit unit.
Preferably, a filtering unit is connected to the front section of the rectifying unit.
Specifically, as shown in fig. 1, the filtering unit is composed of an inductor L1, an inductor L2, an inductor L3, a capacitor CA1, a capacitor CA2, and a capacitor CA 3; the first-phase alternating current input end of the three-phase alternating current input ends is connected with the inductor L1, the second-phase alternating current input end is connected with the inductor L2, and the third-phase alternating current input end is connected with the inductor L3; the capacitor CA1 and the capacitor CA2 are connected in parallel between the 2 nd end of the inductor L1 and the 2 nd end of the inductor L2, and the capacitor CA3 is connected between the 2 nd end of the inductor L3 and the 2 nd end of the inductor L2.
Specifically, as shown in fig. 1, the rectifying unit is composed of a diode D1, a diode D2, a diode D3, a diode D4, a diode D5, and a diode D6; one end of the capacitor CA2, one end of the capacitor CA2 and the 2 nd end of the inductor L1 are connected to V through a forward diode D1DCA voltage terminal connected to the GND terminal through a reverse diode D4; the other end of the capacitor CA2, the other end of the capacitor CA2, one end of the capacitor CA3 and the 2 nd end of the inductor L2 are connected to V through a forward diode D2DCA voltage terminal connected to the GND terminal through a reverse diode D5; the 2 nd ends of the meter inductors L3 at the other ends of the capacitors CA3 are connected to V through forward diodes D3DCThe voltage terminal is connected to the GND terminal through a reverse diode D6.
Fig. 2 is an output curve of the rectifying unit.
As shown in fig. 4, preferably, the half-bridge circuit unit includesThe 1 st pin of the p-type MOSFET is connected with VBA2 nd pin of the voltage end is connected with the power amplifier and a1 st pin of the N-type MOSFET, and a3 rd pin of the voltage end is connected with the time-sharing driving unit; the time-sharing driving unit is connected with the level conversion circuit unit; the level conversion circuit unit is connected with the voltage stabilizing module which is connected with the voltage VDCA voltage terminal.
In order to realize the extreme working condition that the power amplifier in the electronic rectifier works alternately in a continuous wave working state and a pulse working state. This embodiment eliminates the charge pump circuit unit of the conventional driver and provides a half-bridge circuit unit with a small circuit size. Unlike the original half-bridge driving unit, the present embodiment adopts a composite driving structure with one side PMOS driving and one side NMOS driving. The NMOS driving side can be internally provided with a chip, so that the scale of a peripheral circuit is reduced. When the PMOS is driven, the external PMOS power tube is directly driven, thereby using the working voltage VBThe direct power supply avoids adopting a charge pump type structure and simplifies the circuit structure. Meanwhile, the PMOS power tube has normally open capacity, can cope with two working conditions of pulse input signals and continuous wave input signals, and can be switched randomly, the ground of the PMOS driving part is not connected out, an external capacitor is not adopted, and a time-sharing driving unit is adopted.
As shown in fig. 5, specifically, the time-sharing driving unit includes an OUTPUT terminal connected to pin 3 of the p-type MOSFET transistor; the OUTPUT end is connected with the 2 nd pin P2 of the PMOS tube and the MN of the NMOS tube4No. 1 foot、NMOS tube MN3No. 1 foot、NMOS tube MN2A1 st pin and a2 nd pin of a PMOS pipe P1; the 3 rd pin of the PMOS pipe P1 is connected with an NMOS pipe MN1A No. 1 pin and a resistor R5, the other end of the resistor R5 is connected to a No. 1 pin and V of a PMOS tube P1BVoltage terminal, diode DZ1An anode, a resistor R6 and a1 st pin of a PMOS tube P2;
diode DZ1Cathode-connected diode DZ2The other end of the resistor R6 is connected with the 3 rd pin of the p-type MOSFET;
NMOS tube MN4No. 2 pin NMOS tube MN3No. 2 pin NMOS tube MN2No. 2 pin NMOS tube MN1The No. 2 pin is respectively connected to the GND end through a resistor R4, a resistor R3, a resistor R2 and a resistor R1, and the NMOS tube MN4No. 3 footNMOS transistor MN3No. 3 pin and NMOS tube MN2No. 3, NMOS transistor MN1The 3 rd pin is respectively connected with clock control signals n4, n3, n2 and n1 which form time-sharing control.
The signals n 1-n 4 control the switches respectively. NMOS tube MN1～MN4And PMOS transistor MP1、MP2The switching function is realized. Resistors R1-R4 are used for controlling circuit current, and Zener diodes DZ1 and DZ2 are used for realizing the function of a clamp. The R2 and R4 resistors respectively limit the switching tube MN2、MN4The current when conducting is matched with the clamping diode DZ1 and the clamping diode DZ2 to realize voltage drop clamping, and the voltage drop of the voltage does not exceed a preset value when MN2 or MN4 is conducted. Since the resistance value of R2 is only 1/y of that of R4, the voltage drop of the PMOS transistor in the opening stage is slightly larger than MN4Voltage drop of OUTPUT when on.
As shown in fig. 3, the luminous flux test data is input at 380V, and the output is 1000W high-pressure sodium lamp test: the luminous flux of the ballast is about 2% higher than that of the traditional two-phase electronic ballast.
Although the illustrative embodiments of the present invention have been described above to enable those skilled in the art to understand the present invention, the present invention is not limited to the scope of the embodiments, and it is apparent to those skilled in the art that all the inventive concepts using the present invention are protected as long as they can be changed within the spirit and scope of the present invention as defined and defined by the appended claims.

Claims (7)

1. An electronic ballast, characterized by: the electronic ballast comprises a three-phase alternating current input end and a rectifying unit connected with the three-phase alternating current input end, wherein the rectifying unit is connected with a bridge circuit unit for power factor correction and used as the output of a rectifier; the alternating current input end is connected with three phase branches of three-phase alternating current.
2. The electronic ballast of claim 1, wherein: the bridge circuit unit is a full bridge circuit unit or a half bridge circuit unit.
3. The electronic ballast of claim 1, wherein: the front section of the rectifying unit is connected with a filtering unit.
4. The electronic ballast of claim 3, wherein: the filtering unit consists of an inductor L1, an inductor L2, an inductor L3, a capacitor CA1, a capacitor CA2 and a capacitor CA 3; the first-phase alternating current input end of the three-phase alternating current input ends is connected with the inductor L1, the second-phase alternating current input end is connected with the inductor L2, and the third-phase alternating current input end is connected with the inductor L3; the capacitor CA1 and the capacitor CA2 are connected in parallel between the 2 nd end of the inductor L1 and the 2 nd end of the inductor L2, and the capacitor CA3 is connected between the 2 nd end of the inductor L3 and the 2 nd end of the inductor L2.
5. The electronic ballast of claim 4, wherein: the rectifying unit consists of a diode D1, a diode D2, a diode D3, a diode D4, a diode D5 and a diode D6; one end of the capacitor CA2, one end of the capacitor CA2 and the 2 nd end of the inductor L1 are connected to V through a forward diode D1DCA voltage terminal connected to the GND terminal through a reverse diode D4;
the other end of the capacitor CA2, the other end of the capacitor CA2, one end of the capacitor CA3 and the 2 nd end of the inductor L2 are connected to V through a forward diode D2DCA voltage terminal connected to the GND terminal through a reverse diode D5;
the 2 nd ends of the meter inductors L3 at the other ends of the capacitors CA3 are connected to V through forward diodes D3DCThe voltage terminal is connected to the GND terminal through a reverse diode D6.
6. The electronic ballast of claim 4, wherein: the half-bridge circuit unit comprises a p-type MOSFET (metal-oxide-semiconductor field effect transistor) pin 1 connected with a VBA2 nd pin of the voltage end is connected with the power amplifier and a1 st pin of the N-type MOSFET, and a3 rd pin of the voltage end is connected with the time-sharing driving unit; the time-sharing driving unit is connected with the level conversion circuit unit; the level conversion circuit unit is connected with the voltage stabilizing module which is connected with the voltage VDCA voltage terminal.
7. The method of claim 6The electronic ballast is characterized in that: the time-sharing driving unit comprises an OUTPUT end connected with the 3 rd pin of the p-type MOSFET; the OUTPUT end is connected with the 2 nd pin P2 of the PMOS tube and the MN of the NMOS tube4No. 1 foot、NMOS tube MN3No. 1 foot、NMOS tube MN2A1 st pin and a2 nd pin of a PMOS pipe P1; the 3 rd pin of the PMOS pipe P1 is connected with an NMOS pipe MN1A No. 1 pin and a resistor R5, the other end of the resistor R5 is connected to a No. 1 pin and V of a PMOS tube P1BVoltage terminal, diode DZ1An anode, a resistor R6 and a1 st pin of a PMOS tube P2;
diode DZ1Cathode-connected diode DZ2The other end of the resistor R6 is connected with the 3 rd pin of the p-type MOSFET;
NMOS tube MN4No. 2 pin NMOS tube MN3No. 2 pin NMOS tube MN2No. 2 pin NMOS tube MN1The No. 2 pin is respectively connected to the GND end through a resistor R4, a resistor R3, a resistor R2 and a resistor R1, and the NMOS tube MN4No. 3, NMOS transistor MN3No. 3, NMOS transistor MN2No. 3, NMOS transistor MN1The 3 rd pin is respectively connected with clock control signals n4, n3, n2 and n1 which form time-sharing control.
CN202011288340.0A 2020-11-17 2020-11-17 Electronic ballast Pending CN114513873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011288340.0A CN114513873A (en) 2020-11-17 2020-11-17 Electronic ballast

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011288340.0A CN114513873A (en) 2020-11-17 2020-11-17 Electronic ballast

Publications (1)

Publication Number Publication Date
CN114513873A true CN114513873A (en) 2022-05-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011288340.0A Pending CN114513873A (en) 2020-11-17 2020-11-17 Electronic ballast

Country Status (1)

Country Link
CN (1) CN114513873A (en)

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