WO2018188109A1

WO2018188109A1 - Switchable output electronic ballast

Info

Publication number: WO2018188109A1
Application number: PCT/CN2017/081342
Authority: WO
Inventors: 褚青松; 张玉杰; 王留洋; 胡中南
Original assignee: 深圳市朗科智能电气股份有限公司
Priority date: 2017-04-11
Filing date: 2017-04-21
Publication date: 2018-10-18

Abstract

Disclosed in the present invention is a switchable output electronic ballast, comprising a ballast module used for converting mains supply into a high frequency alternating current, comprising a filter circuit, an AC-DC conversion circuit, a power factor correction circuit, and a full bridge inverter circuit connected in turn; a master controller connected to the full bridge inverter circuit and used for driving the full bridge inverter circuit; and a dual output switching circuit, comprising a first branch and a second branch, the first branch and the second branch respectively being provided with a relay K1 and a relay K2, a coil end of the relay K1 being connected to the master controller, a switch end of the relay K1 being connected to the full bridge inverter circuit by means of a light source L1, and a coil end of the relay K2 being connected to the master controller, a switch end of the relay K2 being connected to the full bridge inverter circuit by means of a light source L2. The present switchable output electronic ballast has a simple structure, can smartly control of the connection of the electronic ballast to the different light sources, does not need to be used with a conversion box, and it is convenient to use.

Description

Switchable output electronic ballast

Technical field

The present invention relates to electronic ballasts, and more particularly to a switchable output electronic ballast.

Background technique

Electronic ballasts are widely used in the field of lighting. They have the advantages of good energy-saving performance, stable illumination, dimming, etc., and are popular among all walks of life, especially in indoor planting, and are widely used. In the process of production and planting, many growers will use the plant fill light to fill the plants according to the growth habits of the plants, thereby increasing the production yield of the plants. When using the plant fill light, electronic ballasts are generally used as the power source. Existing electronic ballasts can only be connected to one light source. When such a large area is filled, a large number of electronic ballasts are required, and the production cost is high. And the growth habits of plant production include photosynthesis and dormancy. When the plants are in the photosynthesis stage, the light supplementation is beneficial to the growth of the plants; when the plants are in the dormant stage, there is no need to fill the light, and the electronic ballast needs to be closed, a large number of Electronic ballasts will be idle and not working, resulting in wasted resources. At present, it is popular in the market to use an adapter box to divert an electronic ballast to two planting houses, so that the plants in the two planting houses alternately grow, effectively reducing the procurement cost of the electronic ballast, but an additional purchase conversion box is required. It is not economical; in addition, the conversion box needs to be monitored in real time. Once the operation is wrong, it will have a serious impact on the growth of the plant; at the same time, the switching of the conversion box is carried out during the energization of the ballast, which belongs to the electrification operation and the electronic ballast Both the device and the conversion box are at risk of damage.

In view of this, it is necessary to design an electronic ballast that can be connected to different light sources and is convenient to use, and solves the inconvenience that the existing electronic ballast can only be shunted by converting the box.

Summary of the invention

The technical problem to be solved by the present invention is to provide a switchable output electronic ballast for connecting different light sources by shunting, and solving the inconvenience that the existing electronic ballast can only be shunted by converting boxes.

In order to solve the above technical problem, the present invention discloses the following technical solution: a switchable output electronic ballast, comprising:

a ballast module for converting utility power into high frequency alternating current, comprising a sequentially connected filter circuit, an AC-DC conversion circuit, a power factor correction circuit, and a full bridge inverter circuit;

a main controller connected to the full bridge inverter circuit for driving the full bridge inverter circuit;

a pair of output switching circuits, comprising a first branch and a second branch, wherein the first branch and the second branch are respectively provided with a relay K1 and a relay K2, wherein a coil end of the relay K1 is connected to the main controller, The switch end of the relay K1 is connected to the full bridge inverter circuit through the light source L1; the coil end of the relay K2 is connected to the main controller, and the switch end of the relay K2 is connected to the full bridge inverter circuit through the light source L2; When the main controller outputs a high level, the relay K1 operates to close the switch of the pull-in switch end, and the full-bridge inverter circuit is turned on. The light source L1, the light source L1 is illuminated, and the relay K2 is not working, the full-bridge inverter circuit is open-circuited with the light source L2, and the light source L2 is not bright; when the main controller outputs a low level, the relay K1 does not work. The full-bridge inverter circuit is open-circuited with the light source L1, the light source L1 is not lit, and the relay K2 is operated to close the switch of the pull-in switch end, the full-bridge inverter circuit turns on the light source L2, and the light source L2 is illuminated;

An auxiliary power supply is respectively connected to the main controller and the dual output switching circuit for providing power.

Further, the first branch further includes a transistor Q1, a diode D1, a resistor R1, and a resistor R2. The base of the transistor Q1 is connected to the main controller through a resistor R1, and the base of the transistor Q1 passes through the resistor R2 and the transistor. The emitter of Q1 is connected, the emitter of transistor Q1 is grounded, the collector of transistor Q1 is connected to the auxiliary power supply through the coil end of the relay K1, and the diode D1 is connected in parallel to the coil end of the relay K1 to protect the circuit.

Further, the second branch further includes a transistor Q2, a transistor Q3, a diode D2, a resistor R3, a resistor R4, a resistor R5, and a resistor R6. The base of the transistor Q2 is connected to the main controller through a resistor R3, and the transistor The base of Q2 is connected to the emitter of transistor Q2 through resistor R4, the emitter of transistor Q2 is grounded, the collector of transistor Q2 is connected to the auxiliary power supply via resistor R5, and the collector of transistor Q2 is connected to the base of transistor Q3. The base of the transistor Q3 is connected to the emitter of the transistor Q3 through the resistor R6, the emitter of the transistor Q3 is grounded, the collector of the transistor Q3 is connected to the auxiliary power source through the coil end of the relay K2, and the diode D2 is connected in parallel The coil end of relay K2 protects the circuit.

Further, the full-bridge inverter circuit is further connected to a high-voltage detecting circuit, and the high-voltage detecting circuit is connected to the main controller, and the output voltage of the full-bridge inverter circuit is detected by the main controller.

Further, the high voltage detection circuit includes a capacitor C1, a capacitor C2, a capacitor C3, a diode D3, a resistor R7, a resistor R8, and a resistor R9. One end of the capacitor C1 is connected to the live line of the full bridge inverter circuit, and the capacitor C1 is another. One end is connected to the main controller through the resistor R7 and the anode of the diode D3 in sequence, the resistor R7 is also grounded through the resistor R8, the resistor R9 is connected in parallel across the resistor R8, one end of the capacitor C2 is connected to the cathode of the diode D3, and the capacitor C2 is The other end is grounded, and capacitor C3 is connected in parallel across capacitor C2.

Further, the main controller is further connected to a communication module, and the communication module is configured to receive control information sent by the user terminal and transmit the control information to the main controller, where the communication module is connected to the user terminal by wire or wirelessly.

Further, the main controller is further connected to a display module, and the display module is controlled by the main controller to display an abnormal condition of the circuit.

Further, the display module is a liquid crystal display.

The beneficial technical effect of the present invention is that the switchable output electronic ballast is controlled by the main controller to control the dual output switching circuit switching relay K1 or the relay K2 to make the full bridge inverter circuit be connected to different light sources, thereby solving the problem. The existing electronic ballast needs to cooperate with a conversion box to realize the trouble of splitting and lighting different light sources. The switchable output electronic ballast has a simple structure, and can intelligently control the connection between different light sources and the electronic ballast through the main controller, without using the conversion box, and is convenient to use, and meets the needs of the user.

DRAWINGS

1 is a block diagram showing the structure of an embodiment of the present invention;

2 is a partial circuit connection diagram of an embodiment of the present invention.

detailed description

In order to more fully understand the technical content of the present invention, the technical solutions of the present invention are further described and illustrated in conjunction with the schematic drawings, but are not limited thereto.

As shown in FIG. 1, in the present invention, the switchable output electronic ballast includes a ballast module 1 for converting the commercial power into high frequency alternating current, which includes the sequentially connected filter circuit 11, AC-DC conversion. The circuit 12, the power factor correction circuit 13 and the full bridge inverter circuit 14; a main controller 2, connected to the full bridge inverter circuit 14 for driving the full bridge inverter circuit 14; a dual output switching circuit 3, including the first a branch road and a second branch road, the first branch road and the second branch road are respectively provided with a relay K1 and a relay K2, wherein the coil end of the relay K1 is connected with the main controller 2, and the switch end of the relay K1 passes through the light source L1 and The full bridge inverter circuit 14 is connected; the coil end of the relay K2 is connected to the main controller 2, and the switch end of the relay K2 is connected to the full bridge inverter circuit 14 through the light source L2; during operation, the relay K1 and the relay K2 are controlled by the main control The device 2 alternately works. When the main controller 2 outputs a high level, the relay K1 operates to close the switch of the pull-in switch end, the full-bridge inverter circuit 14 turns on the light source L1, the light source L1 is illuminated, and the relay K2 does not work, all Bridge inverter circuit 14 and light source L2 open circuit Connected, the light source L2 is not bright; when the main controller 2 outputs a low level, the relay K1 does not work, the full-bridge inverter circuit is open-circuited with the light source L1, the light source L1 is not lit, and the relay K2 works to close the switch of the pull-in switch end The full-bridge inverter circuit turns on the light source L2, and the light source L2 is illuminated; and an auxiliary power source 4, which is respectively connected to the main controller 2 and the dual output switching circuit 3, for supplying power. In this embodiment, the filter circuit 11 in the ballast module 1 adopts an EMC filter circuit, and the input end thereof is connected with the mains, which can filter the conducted radio frequency interference and electromagnetic interference in the utility power grid, and hinder the ballast circuit. The generated conductive radio frequency and electromagnetic interference enter the power grid; the AC-DC conversion circuit 12 converts the input alternating current into direct current; the power factor correction circuit 13 uses the APFC circuit to improve the total harmonic content of the power incoming line current and the circuit power factor. High and low; the full bridge inverter circuit 14 completes the conversion of the DC high voltage to the high frequency alternating current to turn on the light source. The auxiliary power source 4 is generally built in the electronic ballast, and converts the commercial power into direct current to satisfy the operation of the main controller 2 and the dual output switching circuit 3.

In this embodiment, as shown in FIG. 2, the first branch further includes a transistor Q1, a diode D1, a resistor R1, and a resistor R2. The base of the transistor Q1 is connected to the main controller through a resistor R1, and the transistor Q1 is The base is connected to the emitter of the transistor Q1 through the resistor R2, the emitter of the transistor Q1 is grounded, the collector of the transistor Q1 is connected to the auxiliary power source through the coil end of the relay K1, and the diode D1 is connected in parallel to the coil of the relay K1. End to protect the circuit. The second branch further includes a transistor Q2, a transistor Q3, a diode D2, a resistor R3, a resistor R4, a resistor R5, and a resistor R6. The base of the transistor Q2 is connected to the main controller through a resistor R3, and the base of the transistor Q2 passes through The resistor R4 is connected to the emitter of the transistor Q2, the emitter of the transistor Q2 is grounded, the collector of the transistor Q2 is connected to the auxiliary power source through the resistor R5, and the collector of the transistor Q2 is connected to the base of the transistor Q3, and the base of the transistor Q3 is connected. The pole is connected to the emitter of the transistor Q3 through the resistor R6, the emitter of the transistor Q3 is grounded, the collector of the transistor Q3 is connected to the auxiliary power source through the coil end of the relay K2, and the diode D2 is connected in parallel at the coil end of the relay K2. To protect the circuit. During operation, the main controller 2 outputs different control signals to the dual output switching circuit 3, and the dual output switching circuit 3 switches the relay K1 or the relay K2 according to the control signal, specifically, when the main controller 2 is switched to the dual output switching circuit. 3 When the output level is high, the transistor Q1 and the transistor Q2 are turned on, the transistor Q3 is turned off, the relay K1 works to close the switch of the pull-in switch terminal, the full-bridge inverter circuit 14 turns on the light source L1, the light source L1 is lit, and the relay K2 is not Working, the full-bridge inverter circuit is connected to the light source L2 open circuit, the light source L2 is not bright; when the main controller 2 outputs the low level to the double output switching circuit 3, the transistor Q1 and the transistor Q2 are turned off, the transistor Q3 is turned on, and the relay K2 works to suck The switch of the switch end is closed, the full-bridge inverter circuit 14 turns on the light source L2, the light source L2 is illuminated, and the relay K1 does not work, the full-bridge inverter circuit is open-circuited with the light source L1, and the light source L1 is not lit. Thereby, under the control of the main controller 2, the full-bridge inverter circuit 14 can be freely switched to turn on the light source L1 or the light source L2, thereby achieving the purpose of lighting different light sources.

In addition, since the starting light source requires high voltage breakdown, the relay withstand voltage capability of the dual output switching circuit 3 is limited, and the high voltage outputted by the full bridge inverter circuit 14 is likely to be burned through the relay without being controlled. For the sake of safety, in the present embodiment, the full-bridge inverter circuit 14 is connected to a high-voltage detecting circuit 5, which is connected to the main controller 2, and detects the output voltage of the full-bridge inverter circuit 14 through the main controller 2. As shown in FIG. 2, the high voltage detecting circuit 5 includes a capacitor C1, a capacitor C2, a capacitor C3, a diode D3, a resistor R7, a resistor R8, and a resistor R9. One end of the capacitor C1 is connected to a live line of the full bridge inverter circuit, and the capacitor C1 is connected. The other end is connected to the main controller through the resistor R7 and the anode of the diode D3. The resistor R7 is also grounded through the resistor R8. The resistor R9 is connected in parallel across the resistor R8. One end of the capacitor C2 is connected to the cathode of the diode D3. The other end of C2 is grounded, and capacitor C3 is connected in parallel across capacitor C2. During high-voltage detection, the output voltage of the full-bridge inverter circuit 14 is firstly blocked by the capacitor C1 and the resistor R7, and then divided by the resistor R8 and the resistor R9, and then filtered by the capacitor C2 and the capacitor C3, and then input to the main control. The main controller 2 calculates the output voltage of the full-bridge inverter circuit 14, and when the output voltage reaches the maximum withstand voltage limit of the relay in the dual-output switching circuit 3, the main controller 2 controls the full-bridge inverse The variable circuit 14 turns off the output, thereby protecting the dual output switching circuit 3.

Preferably, the main controller 2 is also connected to a communication module 6 for receiving control information sent by the user terminal 7 and transmitting it to the main controller 2, which is connected to the user terminal 7 by wire or wirelessly. The user terminal 7 includes a desktop computer, a mobile phone, an IPAD, etc., in use, the user sends relevant control information to the communication module 6 through the user terminal 7, and the communication module 6 receives the control information and transmits the control information to the main controller 2, the main controller 2 The dual output switching circuit 3 is controlled based on the control information so that the relay K1 or the relay K2 is selectively operated, so that the full-bridge inverter circuit 14 is switched on and turned on with different light sources. In actual use, the illumination range, illumination time, illumination intensity, etc. can be set according to requirements, such as controlling the light source L1 in the planting house 1 to light up, the light source L2 to be extinguished, etc., or controlling the light source L1 to work for 23 hours, the light source L2 to work for 1 hour, etc., or The output power of the light source L1 and the light source L2 is controlled.

Preferably, the main controller 2 is also connected to a display module 8, which is controlled by the main controller 2 to display an abnormal condition of the circuit. In this embodiment, the main controller 2 can detect the input voltage of the mains, the output voltage of the full-bridge inverter circuit 14, the input current of the light source L1 or the light source L2, the temperature of the electronic ballast, etc., which are easy to cause the circuit work. The affected data, when the data is abnormal, the main controller 2 transmits the detection result to the display module 8 for display, thereby reminding the user to timely repair the circuit and ensure the circuit safety. In the embodiment, the display module 8 adopts a liquid crystal display, and the display effect is good. In some other preferred solutions, a circuit abnormality alarm device can also be set according to actual needs, so as to better remind the user.

In the solution of the present invention, the switchable output electronic ballast controls the dual output switching circuit 3 to switch the relay K1 or the relay K2 to operate by the main controller 2, so that the full bridge inverter circuit 14 is switched on and connected to different light sources to solve the problem. The existing electronic ballast needs to be equipped with a conversion box to realize the inconvenience of splitting and lighting different light sources; in addition, the switchable output electronic ballast is also provided with a high voltage detecting circuit 5, which can effectively protect the dual output switching circuit 3 In the relay, the double output switching circuit 3 is prevented from being damaged; at the same time, the switchable output electronic ballast is further provided with a display module 8, through which the abnormality of the circuit can be clearly understood, and the circuit can be repaired in time if an abnormality is found. To ensure circuit safety. Therefore, the switchable output electronic ballast has a simple structure, and the intelligent control output can be connected to different light sources without the need of a conversion box, which is convenient to use and meets the user's desire to intelligently control different light sources, and can be widely applied to large-scale applications. Planting, farming or a wide range of circuit light source control areas.

The above-mentioned preferred embodiments are to be considered as illustrative of the embodiments of the present application, and any technical derivation, replacement, improvement, etc., which are based on the same, approximate or based on the present application, should be regarded as the protection scope of the patent.

Claims

A switchable output electronic ballast characterized by comprising:

a ballast module for converting utility power into high frequency alternating current, comprising a sequentially connected filter circuit, an AC-DC conversion circuit, a power factor correction circuit, and a full bridge inverter circuit;

a main controller connected to the full bridge inverter circuit for driving the full bridge inverter circuit;

a pair of output switching circuits, comprising a first branch and a second branch, wherein the first branch and the second branch are respectively provided with a relay K1 and a relay K2, wherein a coil end of the relay K1 is connected to the main controller, The switch end of the relay K1 is connected to the full bridge inverter circuit through the light source L1; the coil end of the relay K2 is connected to the main controller, and the switch end of the relay K2 is connected to the full bridge inverter circuit through the light source L2; When the main controller outputs a high level, the relay K1 operates to close the switch of the pull-in switch end, and the full-bridge inverter circuit is turned on. The light source L1, the light source L1 is illuminated, and the relay K2 is not working, the full-bridge inverter circuit is open-circuited with the light source L2, and the light source L2 is not bright; when the main controller outputs a low level, the relay K1 does not work. The full-bridge inverter circuit is open-circuited with the light source L1, the light source L1 is not lit, and the relay K2 is operated to close the switch of the pull-in switch end, the full-bridge inverter circuit turns on the light source L2, and the light source L2 is illuminated;

An auxiliary power supply is respectively connected to the main controller and the dual output switching circuit for providing power.
The electronic ballast according to claim 1, wherein the first branch further comprises a transistor Q1, a diode D1, a resistor R1, a resistor R2, and a base of the transistor Q1 passes through the resistor R1 and the main controller Connected, and the base of the transistor Q1 is connected to the emitter of the transistor Q1 through the resistor R2, the emitter of the transistor Q1 is grounded, the collector of the transistor Q1 is connected to the auxiliary power source through the coil end of the relay K1, and the diode D1 is connected in parallel The coil end of the relay K1 protects the circuit.
The electronic ballast according to claim 2, wherein the second branch further comprises a transistor Q2, a transistor Q3, a diode D2, a resistor R3, a resistor R4, a resistor R5 and a resistor R6, and a base of the transistor Q2. Connected to the main controller through a resistor R3, and the base of the transistor Q2 is connected to the emitter of the transistor Q2 through a resistor R4, the emitter of the transistor Q2 is grounded, and the collector of the transistor Q2 is connected to the auxiliary power source through a resistor R5. And the collector of the transistor Q2 is connected to the base of the transistor Q3, the base of the transistor Q3 is connected to the emitter of the transistor Q3 through the resistor R6, the emitter of the transistor Q3 is grounded, and the collector of the transistor Q3 is passed through the coil end of the relay K2. Connected to the auxiliary power source, a diode D2 is connected in parallel at the coil end of the relay K2 to protect the circuit.
The electronic ballast according to claim 1, wherein the full-bridge inverter circuit is further connected to a high-voltage detecting circuit, and the high-voltage detecting circuit is connected to the main controller, and the main controller detects the The output voltage of the full bridge inverter circuit.
The electronic ballast according to claim 4, wherein the high voltage detecting circuit comprises a capacitor C1, a capacitor C2, a capacitor C3, a diode D3, a resistor R7, a resistor R8, and a resistor R9. One end of the capacitor C1 is The live line of the full-bridge inverter circuit is connected. The other end of the capacitor C1 is connected to the main controller through the resistor R7 and the anode of the diode D3. The resistor R7 is also grounded through the resistor R8, and the resistor R9 is connected in parallel across the resistor R8. One end of C2 is connected to the negative pole of diode D3, the other end of capacitor C2 is grounded, and capacitor C3 is connected in parallel across capacitor C2.
The electronic ballast according to claim 1, wherein the main controller is further connected to a communication module, wherein the communication module is configured to receive control information sent by the user terminal and transmit the control information to the main controller, the communication The module is connected to the user terminal by wire or wirelessly.
The electronic ballast according to claim 1, wherein the main controller is further connected to a display module, and the display module is controlled by the main controller to display an abnormal condition of the circuit.
The electronic ballast according to claim 7, wherein the display module is a liquid crystal display.