CN212210857U

CN212210857U - Combined control circuit of electronic ballast of metal halide lamp

Info

Publication number: CN212210857U
Application number: CN202021141485.3U
Authority: CN
Inventors: 龙锡炎
Original assignee: Shenzhen Dongsheng Yuanda Technology Co ltd
Current assignee: Shenzhen Dongsheng Yuanda Technology Co ltd
Priority date: 2020-06-17
Filing date: 2020-06-17
Publication date: 2020-12-22
Anticipated expiration: 2030-06-17

Abstract

The utility model discloses a metal halide lamp electronic ballast combination control circuit, including the input socket, first control circuit, the PFC circuit, the second control circuit, Buck circuit and third control circuit, first control circuit includes first inductance, first switch and first diode, the second control circuit includes the second inductance, second switch and second electric capacity, the third control circuit includes the third switch, the fourth switch, fifth switch and sixth switch, the one end and the input socket of first inductance are connected, the other end of first inductance is connected with the one end of first switch and the positive pole of first diode respectively, the negative pole and the PFC circuit connection of first diode, the one end and the one end of second switch of second inductance are connected, the other end of second inductance is connected with the one end and the Buck circuit connection of second electric capacity respectively. The utility model discloses can greatly improve the life-span and the compatibility of metal halide lamp, realize constant power output control, guarantee the luminance of lamp, prolong the life of lamp.

Description

Combined control circuit of electronic ballast of metal halide lamp

Technical Field

The utility model relates to a lamps and lanterns control field, in particular to metal halide lamp electronic ballast combination control circuit.

Background

Dimming of existing household light fixtures is mostly achieved by means of a triac. The controllable silicon is connected with the bulb in series, a voltage which can be adjusted is applied to the grid electrode of the controllable silicon through a certain electronic circuit, and the voltage can change the opening angle of the controllable silicon. The larger the opening angle is, the lower the voltage drop at the two ends of the controlled silicon is, and the higher the voltage of the bulb connected in series with the controlled silicon is, so that after the power switch is switched on, the opening angle of the controlled silicon can be changed along with the adjustment of the grid voltage of the controlled silicon, and the purpose of dimming the lamp is achieved. The traditional incandescent lamp silicon controlled rectifier dimmer has quite wide application, has the advantages of simple wiring, convenient dimming, easy maintenance and the like, but is too simple in control and cannot effectively protect the lamp.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, provide a life-span and compatibility that can greatly improve the metal halide lamp, realize constant power output control, guarantee the luminance of lamp, the metal halide lamp electronic ballast combination control circuit of the life of extension lamp.

The utility model provides a technical scheme that its technical problem adopted is: a combined control circuit of a metal halide lamp electronic ballast is constructed, and comprises an input socket, a first control circuit, a PFC circuit, a second control circuit, a Buck circuit and a third control circuit, wherein the first control circuit comprises a first inductor, a first switch and a first diode, the second control circuit comprises a second inductor, a second switch and a second capacitor, the third control circuit comprises a third switch, a fourth switch, a fifth switch and a sixth switch, one end of the first inductor is connected with the input socket, the other end of the first inductor is respectively connected with one end of the first switch and the anode of the first diode, the other end of the first switch is grounded, the cathode of the first diode is connected with the PFC circuit, one end of the second inductor is connected with one end of the second switch, the other end of the second switch is grounded, the other end of the second inductor is respectively connected with one end of the second capacitor and the Buck circuit, the other end of the second switch and the other end of the second capacitor are grounded, one end of the third switch is connected with one end of the fifth switch, the other end of the third switch is connected with one end of the fourth switch, the other end of the fifth switch is connected with one end of the sixth switch, and the other end of the fourth switch is connected with the other end of the sixth switch.

In the combined control circuit of the metal halide lamp and the electronic ballast, the first control circuit adopts the PFC to control.

In the combined control circuit for electronic ballast of metal halide lamp, the second control circuit and the third control circuit adopt MCU for control.

The metal halide lamp electronic ballast combination control circuit in, still include first electric capacity, the one end of first electric capacity respectively with the negative pole and the PFC circuit connection of first diode, the other end ground connection of first electric capacity.

In the combined control circuit of the metal halide lamp and the electronic ballast, the model of the MCU is STM32F334C 8T.

In the combined control circuit of the metal halide lamp and the electronic ballast, the PFC controls the switch of the first switch to output a constant dc voltage within an ac input range.

In the combined control circuit of the metal halide lamp and the electronic ballast, the MCU controls the switch of the second switch to output different dc voltages in the starting process along with the difference of the metal halide lamp.

In the combined control circuit of the metal halide lamp and the electronic ballast, the MCU controls the switches of the third switch, the fourth switch, the fifth switch and the sixth switch, and the MCU controls the output of different 120Hz square wave voltages to turn on or off in the starting process along with the difference of the metal halide lamp.

Implement the utility model discloses a metal halide lamp electronic ballast combination control circuit has following beneficial effect: owing to be equipped with input socket, first control circuit, PFC circuit, second control circuit, Buck circuit and third control circuit, first control circuit includes first inductance, first switch and first diode, and second control circuit includes the second inductance, second switch and second electric capacity, and third control circuit includes the third switch, the fourth switch, fifth switch and sixth switch, adopts the combination control circuit that the metal halide lamp used, is particularly useful for compatible different metal halide lamps and uses, plays apparent effect to starting with the effect of adjusting luminance, the utility model discloses compare with prior art, can greatly improve the life-span and the compatibility of metal halide lamp, realize constant power output control, guarantee the luminance of lamp, prolong the life of lamp.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of an embodiment of the combined control circuit of the metal halide lamp electronic ballast of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the embodiment of the combined control circuit for the metal halide lamp electronic ballast of the present invention, the schematic structural diagram of the combined control circuit for the metal halide lamp electronic ballast is shown in fig. 1. In fig. 1, the combined control circuit of the metal halide lamp electronic ballast comprises an input socket AC220V, a first control circuit 11, a PFC circuit, a second control circuit 12, a Buck circuit and a third control circuit 13, wherein the first control circuit 11 comprises a first inductor L1, a first switch K1 and a first diode D1, the second control circuit 12 comprises a second inductor L2, a second switch K2 and a second capacitor C2, the third control circuit 13 comprises a third switch K3, a fourth switch K4, a fifth switch K5 and a sixth switch K6, one end of the first inductor L1 is connected with the input socket AC220 AC 8, the other end of the first inductor L1 is connected with one end of the first switch K1 and the anode of the first diode D1, the other end of the first switch K1 is grounded, the cathode of the first diode D1 is connected with the PFC circuit, one end of the second inductor L1 is connected with the first end of the second switch K3527, the other end of the second switch K2 is connected with the ground, the other end of the second inductor L2 is respectively connected with one end of a second capacitor C2 and the Buck circuit, the other end of a second switch K2 and the other end of the second capacitor C2 are both grounded, one end of a third switch K3 is connected with one end of a fifth switch K5, the other end of the third switch K3 is connected with one end of a fourth switch K4, the other end of the fifth switch K5 is connected with one end of a sixth switch K6, and the other end of the fourth switch K4 is connected with the other end of the sixth switch K6.

The first control circuit 11 is controlled using PFC. The second control circuit 12 and the third control circuit 13 are controlled by an MCU. In this embodiment, the model of the MCU is STM32F334C 8T. Of course, in practical application, the MCU may also be another MCU with the same function.

Specifically, the PFC of the first control circuit 11 controls the switching of the first switch K1, and outputs a constant dc voltage in an ac input range. The PFC adopts a PFC control chip with model number NCP1654, and the PFC is used for controlling the first switch K1 in a switching mode, so that input alternating current is changed into direct current to be output through the first inductor L1, the first switch K1 and the first diode D1, and the direct current is boosted to 400 VDC.

For the second control circuit 12, the MCU controls the switch of the second switch K2, and the MCU controls the output of different dc voltages during the start-up process according to the difference of the metal halide lamp L. Specifically, with the difference of the metal halide lamp L, the MCU controls the switch of the second switch K2 to step down the output dc voltage through the second inductor L2 and the second capacitor C2, and during the start-up process, the MCU controls the output of different dc voltages along with the difference of the output.

For the third control circuit 13, the MCU controls the switches of the third switch K3, the fourth switch K4, the fifth switch K5 and the sixth switch K6, converts the dc voltage outputted from the second control circuit 12 into an ac voltage of square wave, and controls the MCU to output different square wave voltages of 120Hz to light up in the starting process according to the difference of the metal halide lamps L.

The metal halide lamp electronic ballast adopts a digital design, the rectifier is controlled by the MCU to provide an external interface, and a user can adapt to metal halide lamps L of different brands by selecting different interface states. The utility model discloses a combination control circuit that metal halide lamp used is particularly useful for compatible different metal halide lamps and uses, plays to start and adjust luminance the effect and is showing the effect.

In this embodiment, the combined control circuit of the metal halide lamp electronic ballast further includes a first capacitor C1, one end of the first capacitor C1 is connected to the cathode of the first diode D1 and the PFC circuit, respectively, and the other end of the first capacitor C1 is grounded.

In short, in this embodiment, the combined control circuit of the metal halide lamp electronic ballast is a digitally controlled combined control circuit of the metal halide lamp, and after the three parts of control circuits are combined together, the second control circuit 12 and the third control circuit 13 control the start and operation of the power supply through the MCU. The utility model discloses a to the control of metal halide lamp, metal halide lamp electronic ballast adopts digital design, provides external interface through MCU control rectifier setting, and the user selects different interface states can the different brand of metal halide lamp L of adaptation. Compared with the prior art, the utility model, can greatly improve the life-span and the compatibility of metal halide lamp, realize constant power output control, guarantee the luminance of lamp, prolong the life of lamp.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A combined control circuit of a metal halide lamp electronic ballast is characterized by comprising an input socket, a first control circuit, a PFC circuit, a second control circuit, a Buck circuit and a third control circuit, wherein the first control circuit comprises a first inductor, a first switch and a first diode, the second control circuit comprises a second inductor, a second switch and a second capacitor, the third control circuit comprises a third switch, a fourth switch, a fifth switch and a sixth switch, one end of the first inductor is connected with the input socket, the other end of the first inductor is respectively connected with one end of the first switch and the anode of the first diode, the other end of the first switch is grounded, the cathode of the first diode is connected with the PFC circuit, one end of the second inductor is connected with one end of the second switch, and the other end of the second switch is grounded, the other end of the second inductor is respectively connected with one end of the second capacitor and the Buck circuit, the other end of the second switch and the other end of the second capacitor are grounded, one end of the third switch is connected with one end of the fifth switch, the other end of the third switch is connected with one end of the fourth switch, the other end of the fifth switch is connected with one end of the sixth switch, and the other end of the fourth switch is connected with the other end of the sixth switch.

2. The combined control circuit of the metal halide lamp and the electronic ballast as claimed in claim 1, wherein the first control circuit is controlled by a PFC.

3. The combined control circuit of the metal halide lamp and the electronic ballast as claimed in claim 2, wherein the second control circuit and the third control circuit are controlled by an MCU.

4. The combined control circuit of the metal halide lamp and the electronic ballast as claimed in claim 3, further comprising a first capacitor, wherein one end of the first capacitor is connected to the cathode of the first diode and the PFC circuit, respectively, and the other end of the first capacitor is grounded.

5. A combined control circuit for a metal halide lamp and electronic ballast according to claim 3 or 4, wherein the MCU is of the type STM32F334C 8T.

6. The combined control circuit of claim 2, wherein the PFC controls the switching of the first switch to output a constant dc voltage over an ac input range.

7. The combined control circuit of claim 3, wherein the MCU controls the switch of the second switch, and the MCU controls the output of different DC voltages during the starting process according to different metal halide lamps.

8. The combined control circuit of the metal halide lamp and the electronic ballast as claimed in claim 3, wherein the MCU controls the switches of the third switch, the fourth switch, the fifth switch and the sixth switch, and the MCU controls the output of different 120Hz square wave voltages to light up during the starting process according to the metal halide lamps.