High-voltage direct-current communication control device

Abstract

The invention provides a high-voltage direct-current communication control device. A transmitting device comprises a high-voltage direct-current input end, a direct-current load access end, an IGBT (Insulated Gate Bipolar Translator), a CPU (Central Processing Unit) transmitting unit, a relay and an external dimming signal input port. And the receiving device comprises a data sampling resistor, a CPU receiving processing unit, an LED power supply and an LED lamp bead. The method is characterized in that a transmitting device converts dimming signals acquired by an external dimming signal interface or timing multi-section dimming signals transmitted by a background into corresponding data formats, an IGBT is in a full-conduction state when the high level of data is transmitted, the IGBT is in a linear voltage reduction state when the low level of the data is transmitted, and at the moment, voltage of a certain amplitude can be absorbed. As the IGBT and the receiving device are in series connection and voltage division relation, the voltage on the IGBT becomes larger and the voltage on the receiving device becomes smaller, the CPU sending unit can control the IGBT to enable the voltage of the power supply line to change, and therefore communication information is formed.

Description

Technical Field

[0001] The invention relates to the field of high-voltage 400V or 750V direct current power supply lighting communication control, in particular to a high-voltage direct current communication technology. Background Art

[0002] Existing DC-powered lighting control must achieve communication through the power supply line, either relying on a dedicated power carrier transceiver controller, or using a BUCK topology switching power supply to send high and low levels to achieve low-speed communication. The power carrier method has a high communication speed, but the receiving and sending controllers are very complex and costly. Although the switching power supply method has a simple receiving controller, its sending controller is a switching power supply, which is not only complex, but also has too slow communication speeds. At the same time, the known DC communication systems either set the dimming parameters through their own touch screens or through their own matching background monitoring systems. They cannot access third-party dimming devices, are not very versatile, and have insufficient freedom. Summary of the invention

[0003] The present invention proposes a high-voltage DC communication control device. The purpose of the present invention is to provide a DC communication device with a communication speed between the two, and both the sending controller and the receiving controller are low-cost and easy to use. At the same time, the device can accept external signal standards such as 0-10V, PWM, and resistance for dimming control, solving the problem of compatibility with third-party dimmers or controllers. In addition, the device can also receive background instructions through dimming line multiplexing technology and enter the timed multi-stage dimming mode to meet the diverse needs of the project.

[0004] The technical solution of the present invention is implemented as follows: The present invention is implemented by adopting the following technical solution: A high-voltage DC communication control device, the sending device includes a high-voltage DC input terminal, a DC load access terminal, an IGBT, a CPU sending unit, a relay, and an external dimming signal input port. The receiving device includes a data sampling resistor, a CPU receiving processing unit, an LED power supply, and an LED lamp bead. It is characterized in that the sending device converts the dimming signal collected by the external dimming signal interface or the timed multi-stage dimming signal sent from the background into a corresponding data format, the IGBT is in a fully conductive state when the high level of the data is sent, and the IGBT is in a linear step-down state when the low level of the data is sent, and a certain amplitude of voltage will be absorbed at this time. Since the IGBT and the receiving device are in a series voltage-dividing relationship, the voltage on the IGBT will increase, which will cause the voltage on the receiving device to decrease. Therefore, the CPU sending unit controls the IGBT to make the voltage of the power supply line change, thereby forming communication information. In order to reduce loss and lower temperature, a relay is connected in parallel to the IGBT. When the communication data is sent, the relay will be attracted to shunt and complete the entire process of data sending. On the receiving side, the data sampling resistor at the receiving end is connected to the power supply line, and the sampled data signal is sent to the CPU receiving processing unit, which then controls the LED power supply to dim the LED lamp beads according to the data information.

[0005] As a preferred technical solution of the present invention, the external dimming signal can be a dimming signal such as 0-10V, PWM, resistance, background timing multi-segment programming, etc.

[0006] As a preferred technical solution of the present invention, the IGBT operates in two states: a full-on state and a linear step-down state, and there is no off state.

[0007] As a preferred technical solution of the present invention, the relay and IGBT are connected in parallel to achieve current shunting to reduce temperature and loss.

[0008] As a preferred technical solution of the present invention, the receiving end can complete data reading and collection simply through resistance sampling.

[0009] As a preferred technical solution of the present invention, there may be one or more receiving devices.

[0010] After adopting the above technical solution, the beneficial effects of the present invention are: compared with the prior art, the present invention has a simple structure, requires fewer electronic components, has a medium communication speed, can accept a third party's 0-10V, PWM, resistance and other signals for dimming control, has strong versatility and high degree of freedom. At the same time, in order to reduce the loss and temperature of the IGBT, a relay is energized for shunting. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0012] Figure 1 This is a schematic diagram of the structure of the present invention.

[0013] Figure 2 Schematic diagram of input and output voltage signal waveforms.

[0014] Figure 3 It is the electrical schematic diagram of the present invention. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] Example:

[0017] like Figures 1 to 3 As shown, a high-voltage DC communication control device, the sending device includes a high-voltage DC input terminal, a DC load access terminal, an IGBT, a CPU sending unit, a relay, and an external dimming signal input port. The receiving device includes a data sampling resistor, a CPU receiving processing unit, an LED power supply, and an LED lamp bead. It is characterized in that: the sending device converts the dimming signal collected by the external dimming signal interface or the timed multi-stage dimming signal sent from the background into a corresponding data format, the IGBT is in a fully conductive state when the high level of the data is sent, and the IGBT is in a linear step-down state when the low level of the data is sent, and a certain amplitude of voltage will be absorbed at this time. Since the IGBT and the receiving device are in a series voltage-dividing relationship, the voltage on the IGBT will increase, which will cause the voltage on the receiving device to decrease. Therefore, the CPU sending unit controls the IGBT to make the voltage of the power supply line change, thereby forming communication information. In order to reduce loss and lower temperature, a relay is connected in parallel to the IGBT. When the communication data is sent, the relay will be attracted to shunt and complete the entire data sending process. On the receiving side, the data sampling resistor at the receiving end is connected to the power supply line, and the sampled data signal is sent to the CPU receiving processing unit, which then controls the LED power supply to dim the LED lamp beads according to the data information.

[0018] like Figures 1 to 3As shown, in the specific practical implementation, the sending device 10 includes a high-voltage DC input terminal 101, a DC output load terminal 102, an IGBT tube 103, and a relay 104 on the IGBT tube, and a CPU sending unit 105, wherein the voltage regulator tube 1031 and the resistor 1032 on the IGBT tube control the value of the linear voltage drop of the IGBT, and the diode 1033 tube prevents the data signal from being absorbed. The CPU sending unit includes an output signal isolation optical coupler 1051 and an external 0-10V, PWM, resistor, timed multi-stage dimming and other user input command signals 1052. The timed multi-stage dimming parameters are set through the background PC personal computer APP interface 106.

[0019] The receiving device 20 includes a voltage-dividing sampling resistor 201 , a CPU receiving unit 202 , an LED power supply 203 , and an LED lamp bead 204 .

[0020] When the invention starts working, the sending device 10 first detects whether the external 0-10V, PWM, resistance, and timing multi-segment signal 1052 have changed. Once there is a change, the sending unit 105 immediately converts it into a certain coding format to drive the IGBT tube 104 to forward the signal from the power supply line in a high and low level alternating manner, and finally outputs the coded signal 40 (see Figure 2 ), after the data is sent, the relay 104 is immediately controlled to be attracted to shunt to reduce the loss of the IGBT. At the same time, on the other side, the receiving device 20 transmits the signal to the CPU receiving unit 202 through the sampling resistor 201 for decoding, and then controls the LED power supply 203 to change the brightness of the LED lamp bead 204. The receiving device 20 can be one or more.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, 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 high voltage direct current communication control device, characterized in that: It includes a sending device and a receiving device, wherein the sending device includes a high-voltage DC input terminal, a DC load access terminal, an IGBT, a CPU sending unit, a relay and an external dimming signal input port, and the receiving device includes a data sampling resistor, a CPU receiving processing unit, an LED power supply and an LED lamp bead; When the data sent by the sending device is at a high level, the IGBT is in a fully conductive state, and when the data sent is at a low level, the IGBT is in a linear step-down state. At this time, the sending device absorbs a voltage of a set amplitude; The IGBT and the receiving device are connected in series with a voltage divider. The voltage on the IGBT increases, corresponding to the voltage on the receiving device decreases. The CPU sending unit controls the IGBT to make the voltage of the power supply line change to form communication information. A relay is connected in parallel to the IGBT. When the communication data is sent, the relay will be energized to shunt the current, completing the entire data sending process. The receiving end reads the voltage change on the power supply line through the resistance voltage divider to read the data information.

2. A high voltage direct current communication control device according to claim 1, characterized in that: The IGBT tube and the Zener tube are combined to receive the high and low level signals sent by the CPU through optical coupling isolation, and correspondingly present two states: fully on and linear step-down half-on. The IGBT and the load are connected in series to divide the voltage, resulting in a small amplitude high and low level change data signal at the load end.

3. A high voltage direct current communication control device according to claim 1, characterized in that: The relay is connected in parallel with the IGBT and is energized to shunt and cool down when data transmission is completed.

4. A high voltage direct current communication control device according to claim 1, characterized in that: The receiving end reads the voltage change on the power supply line through resistance voltage division to read the data information.

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