Three-phase LED lighting rectifier dimming circuit with phase loss detection

Abstract

This three-phase LED lighting rectifier and dimming circuit with phase loss detection belongs to the field of LED lighting control technology. It solves the maintenance problem of not being able to diagnose phase loss faults in three-phase LED lighting systems in a timely manner. The circuit includes: a surge protection rectifier module (connected to the three-phase input voltage, including fuses, varistors, gas discharge tubes, and a three-phase rectifier bridge, outputting high-voltage DC); a phase loss detection power supply module (input from phases UA and UB, including a rectifier bridge, voltage regulator circuit, phase loss detection unit, and isolated DC / DC converter, outputting multiple isolated power supplies and triggering an LED2 alarm in case of phase loss); and a voltage regulation isolation module (inputting the dimming signal, including dual operational amplifiers, optocoupler isolation units, and rheostats, achieving isolated amplification and voltage regulation of the dimming signal). This invention realizes phase loss protection and early warning for three-phase LED lighting systems, automatically reducing output power through voltage monitoring and triggering LED alarms to prevent overload damage to components.

Description

Technical Field

[0001] This utility model belongs to the field of LED lighting control technology, and relates to a three-phase LED lighting rectifier dimming circuit with phase loss detection. Background Technology

[0002] Current three-phase LED lighting systems have the following technical defects: 1) Risk of phase loss damage: Traditional rectifier circuits cause abnormal output voltage when a phase is lost, resulting in uneven lighting brightness or overload damage to power devices; 2) Three-phase dimming imbalance: Existing dimming devices are mostly designed for single phases and lack a three-phase phase balance monitoring mechanism, which can easily cause load imbalance during dimming; 3) Delayed fault response: Phase loss faults cannot be warned in real time, increasing system maintenance costs and downtime risks. Utility Model Content

[0003] The technical solution of this utility model is used to solve the operation and maintenance problem of the inability to diagnose phase loss faults in three-phase LED lighting systems in a timely manner.

[0004] This utility model solves the above-mentioned technical problems through the following technical solution:

[0005] This utility model embodiment provides a three-phase LED lighting rectifier dimming circuit with phase loss detection, including: a surge protection rectifier module, a phase loss detection power supply module, and a voltage regulation isolation module. The input terminal of the surge protection rectifier module is connected to the three-phase voltage, and the positive terminal HV+ and negative terminal HV- of the DC output terminal of the surge protection rectifier module are respectively connected to the phase loss detection power supply module. The phase loss detection power supply module is connected to the voltage regulation isolation module. The phase loss detection power supply module includes: a phase loss detection unit, which includes: resistors R22, R23, R24, R25, R26, and R27, a Zener diode Z2, a diode D13, a light-emitting diode LED2, and a transistor Q1. Resistors R23, R24, R25, and R26 are connected in series. The non-series terminal of resistor R23 is connected to the cathode of diode D13. The anode of diode D13 is connected to the positive terminal HV+ of the DC output. The non-series terminal of resistor R26 is connected to the negative terminal HV- of the DC output. The common point of resistors R25 and R26 is connected to the cathode of Zener diode Z2. The anode of Zener diode Z2 is connected to the base of transistor Q1. The collector of transistor Q1 is connected to one end of resistor R22 and the anode of LED2. The other end of resistor R22 is connected to a DC voltage. The cathode of LED2 and the emitter of transistor Q1 are both connected to the negative terminal HV- of the DC output.

[0006] Furthermore, the lightning protection rectifier module includes: fuses F1~F3, varistors RV1~RV3, gas discharge tube TV1, and diodes D1~D6; wherein, diodes D1~D6 form a three-phase rectifier bridge, one end of fuses F1~F3 is connected to the three-phase voltages UA, UB, and UC respectively, and the other end of fuses F1~F3 is connected to the three-phase input terminals A, B, and C of the three-phase rectifier bridge respectively, the output terminal of the three-phase rectifier bridge outputs DC voltage, one end of varistors RV1~RV3 is connected to the three-phase input terminals A, B, and C of the three-phase rectifier bridge respectively, the other end of varistors RV1~RV3 is connected together and then connected to one end of gas discharge tube TV1, and the other end of gas discharge tube TV1 is grounded.

[0007] Furthermore, the power module with phase loss detection includes: fuse F5, resistors R16, R17, R18, R19, and R20, capacitors C14 and C15, and rectifier bridge D7; the UA phase voltage is connected to 1 / 2 of rectifier bridge D7. # Terminal connections: Phase UB voltage is connected to one end of fuse F5, and the other end of fuse F5 is connected to one end of resistor R16. Resistors R17, R18, R19, and R20 are connected in series. The non-series terminal of resistor R17 is connected to the other end of resistor R16, and the non-series terminal of resistor R20 is connected to the rectifier bridge D7. # Terminal connections: one end of capacitor C14 is connected to the common point where resistors R16 and R17 are connected, and the other end of capacitor C14 is connected to the rectifier bridge D7. # Terminal connections: one end of capacitor C15 is connected to the common point where resistors R16 and R17 are connected, and the other end of capacitor C15 is connected to the rectifier bridge D7. # Terminal connections, rectifier bridge D7's 3 # Terminal output voltage, rectifier bridge D7's 4 # Terminal grounded.

[0008] Furthermore, the power supply module with phase loss detection also includes: a resistor R21, a capacitor C1, and a Zener diode Z1; one end of the resistor R21 is connected to the rectifier bridge D7. # Terminal connections: the other end of resistor R21 is connected to the cathode of Zener diode Z1, the anode of Zener diode Z1 is grounded, one end of capacitor C1 is grounded, and the other end of capacitor C1 is connected to the common connection point of resistor R21 and the cathode of Zener diode Z1. The collector of transistor Q1 is connected to one end of resistor R22 and the anode of light-emitting diode LED2, and the other end of resistor R22 is connected to the common connection point of resistor R21 and the cathode of Zener diode Z1.

[0009] Furthermore, the power module with phase loss detection further includes: resistor R1, capacitors C3 and C4, electrolytic capacitor C5, light-emitting diode LED1, and TVS transient voltage suppressor diode D8; capacitors C3, C4, C5, and D8 are connected in parallel, the positive terminal of electrolytic capacitor C5 is connected to the common connection point of R21, C1, Z1, and R22, the negative terminal of electrolytic capacitor C5 is grounded, one end of resistor R1 is connected to the positive terminal of electrolytic capacitor C5, the other end of resistor R1 is connected to the anode of light-emitting diode LED1, and the cathode of light-emitting diode LED1 is grounded.

[0010] Furthermore, the power module with phase loss detection further includes: DC / DC power module U2, DC / DC power module U3, capacitors C6, C7, C8, and C9; and 1 of DC / DC power module U2. # Terminal grounding, DC / DC power module U2's 2 # The terminals are connected to DC voltage, and the 3rd terminal of the DC / DC power module U2 is connected to DC voltage. # Terminal grounding, DC / DC power module U2's 4 # Terminal output DC voltage; DC / DC power module U3's 1 # Terminal grounding, DC / DC power module U3's 2 # The terminal is connected to DC voltage, DC / DC power module U3's 3 # Terminal grounding, DC / DC power module U3's 4 # The terminal outputs DC voltage; one end of capacitor C6 is connected to DC voltage, and the other end of capacitor C6 is grounded; one end of capacitor C7 is connected to DC voltage, and the other end of capacitor C7 is grounded; one end of capacitor C8 is connected to DC voltage, and the other end of capacitor C8 is grounded; one end of capacitor C9 is connected to DC voltage, and the other end of capacitor C9 is grounded.

[0011] Furthermore, the voltage regulation isolation module includes: resistors R6, R7, and R10; a resettable fuse F6; an electrolytic capacitor C10; an ESD protection diode D9; and a TVS transient voltage suppressor diode D10; the electrolytic capacitor C10, resistor R10, ESD protection diode D9, and TVS transient voltage suppressor diode D10 are connected in parallel, wherein the ESD protection diode D9 has a 3 # The terminal is connected to the negative terminal of capacitor C10 and grounded, and the ESD protection diode D9 is connected to the ground. # and 2 #The terminal is connected to the positive terminal of electrolytic capacitor C10; the positive terminal of electrolytic capacitor C10 is connected to one end of resettable fuse F6, and the other end of resettable fuse F6 is connected to the positive terminal of the power supply and the negative terminal of electrolytic capacitor C10. Resistors R6 and R7 are connected in series, with the non-series terminal of resistor R6 connected to the positive terminal of electrolytic capacitor C10 and the non-series terminal of resistor R6 connected to terminal 3 of dual operational amplifier U5. # terminal.

[0012] Furthermore, the voltage regulation isolation module also includes: resistors R2, R3, R4, R11, R12, R13, R14, and R15; a variable resistor R5; capacitors C11 and C13; a dual operational amplifier U5; and optocouplers U4 and U7. Resistor R14 and resistor R15 are connected in series, wherein the non-series terminal of resistor R14 is grounded, and the non-series terminal of resistor R15 is connected to the 2π pin of the dual operational amplifier U5. # Terminal connections: Resistor R2 and resistor R3 are connected in series, where the non-series terminal of resistor R2 is connected to terminal 1 of the dual operational amplifier U5. # Terminal connection, the non-series terminal of resistor R3 is connected to the 1 terminal of optocoupler U4. # Terminal connections, 4 of dual operational amplifier U5 # Terminals and 5 # Terminal grounding, 6th terminal of dual operational amplifier U5 # Terminals and 7 # The terminals are connected together, and the 8 terminals of the dual operational amplifier U5 are connected together. # Terminal 2 is connected to DC voltage; optocoupler U4's 2 # Terminal 1 of optocoupler U7 # Terminal connection, optocoupler U4's 4 # Terminal 4 is connected to one end of resistor R4, and the other end of resistor R4 is connected to a DC voltage. The optocoupler U7 has terminal 4... # The terminal is connected to one end of resistor R13, and the other end of resistor R13 is connected to a DC voltage. The optocoupler U7 has two terminals connected to this terminal. # Terminal grounding, optocoupler U7's 3 # Terminals 2 and 2 of dual operational amplifier U5 # Terminal connections: One end of capacitor C11 is connected to DC voltage, and the other end of capacitor C11 is grounded; one end of capacitor C13 is connected to one end of resistor R12, and the other end of capacitor C13 is grounded; the other end of resistor R12 is connected to terminal 3 of dual operational amplifier U6. # The common point of connection between the terminals, capacitor C13 and resistor R12, and optocoupler U4 is at terminal 3. # The terminals are connected in series: resistor R11 is connected in series with rheostat R5, and the non-series terminal of resistor R11 is grounded. The non-series terminal of rheostat R5 is connected to the common point of connection between capacitor C13 and resistor R12.

[0013] Furthermore, the voltage regulation isolation module also includes: resistors R8 and R9, a dual operational amplifier U6, a capacitor C12, a TVS transient suppression diode D11, and an ESD electrostatic protection diode D12; one end of resistor R9 is connected to the voltage across the dual operational amplifier U6. # Terminal connection, the other end of resistor R9 is connected to the 2 terminal of dual operational amplifier U6. # Terminal connections, 4 of the dual operational amplifier U6 # Terminals and 5 # Terminal grounding, 6th terminal of dual operational amplifier U6 # Terminals and 7 # The terminals are connected together, and the 8 terminals of the dual operational amplifier U6 are connected together. # The terminal is connected to a DC voltage; one end of the TVS transient suppression diode D11 is connected to the 1 terminal of the dual operational amplifier U6. # Terminal connections: one end of TVS transient voltage suppressor diode D11 is grounded, and one end of resistor R8 is connected to the ESD protection diode D12. # and 2 # Terminal connection, the other end of resistor R8 outputs voltage, ESD protection diode D12's 3 # The terminal is grounded; one end of capacitor C12 is connected to DC voltage, and the other end of capacitor C12 is grounded.

[0014] Preferably, the rectifier bridge D7 is an MB10F (1A) surface mount rectifier bridge; the TVS transient suppression diode D8 is an SMBJ15CA; the DC / DC power module U2 and DC / DC power module U3 are B1212S-1WR3; the dual operational amplifiers U5 and U6 are LM358; the optocouplers U4 and U7 are EL817S1(B)(TU)-F; and the ESD protection diode D9 is ESD2105L.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1) Phase loss protection and early warning: Automatically reduces output power and triggers LED alarm through voltage monitoring to prevent overload damage to components;

[0017] 2) Three-phase load balancing: Intelligent power distribution is adjusted when a phase is lost to ensure uniform lighting and extend LED life;

[0018] 3) Wide compatibility dimming: Supports multiple dimming signal inputs such as 0-10V / DALI, suitable for complex lighting scenarios;

[0019] 4) Modular design facilitates maintenance: The three modules of lightning protection rectification, phase loss detection, and voltage regulation isolation are independently designed, which facilitates fault location and replacement;

[0020] 5) Strong anti-interference capability: Multi-level isolated power supply (V12_1~V12_3) and TVS / ESD protection design improve system stability. Attached Figure Description

[0021] Figure 1 This is a circuit diagram of a surge protection rectifier module with a phase loss detection three-phase LED lighting rectifier dimming circuit according to Embodiment 1 of this utility model.

[0022] Figures 2 to 5 This is a circuit diagram of a power supply module with phase loss detection in a three-phase LED lighting rectifier dimming circuit with phase loss detection according to Embodiment 1 of this utility model.

[0023] Figures 6 to 8 This is a circuit diagram of the voltage regulation isolation module of the three-phase LED lighting rectifier dimming circuit with phase loss detection according to Embodiment 1 of this utility model.

[0024] Figure 9 This is a PCB layout diagram of a three-phase LED lighting rectifier dimming circuit with phase loss detection according to Embodiment 1 of this utility model. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments:

[0027] Example 1

[0028] The three-phase LED lighting rectifier and dimming circuit with phase loss detection according to this utility model embodiment is suitable for three-phase power supply LED lighting systems in industrial and commercial applications. It includes: a surge protection rectifier module, a power supply module with phase loss detection, and a voltage regulation and isolation module.

[0029] like Figure 1As shown, the lightning protection rectifier module includes: fuses F1~F3, varistors RV1~RV3, gas discharge tube TV1, and diodes D1~D6; wherein, diodes D1~D6 form a three-phase rectifier bridge, one end of fuses F1~F3 is connected to the three-phase voltages UA, UB, and UC respectively, and the other end of fuses F1~F3 is connected to the three-phase input terminals A, B, and C of the three-phase rectifier bridge respectively, and the output terminal of the three-phase rectifier bridge outputs DC voltage (HV+, HV-), one end of varistors RV1~RV3 is connected to the three-phase input terminals A, B, and C of the three-phase rectifier bridge respectively, and the other end of varistors RV1~RV3 is connected together and then connected to one end of gas discharge tube TV1, and the other end of gas discharge tube TV1 is grounded.

[0030] Preferably, the varistor RV1~RV3 is model 14D821, the gas discharge tube is model 2RE800L-8 FTR gas discharge tube, and the rectifier diodes D1~D6 are model EM520.

[0031] like Figures 2 to 5 As shown, the power module with phase loss detection includes: fuse F5, resistors R16, R17, R18, R19, and R20, capacitors C14 and C15, rectifier bridge D7; resistors R21, R22, R23, R24, R25, R26, and R27, capacitor C1, Zener diodes Z1 and Z2, diode D13, light-emitting diode LED2, transistor Q1; resistor R1, capacitors C3 and C4, electrolytic capacitor C5, light-emitting diode LED1, TVS transient voltage suppressor diode D8; DC / DC power module U2, DC / DC power module U3, capacitors C6, C7, C8, and C9.

[0032] like Figure 2 As shown, the voltage of phase UA is connected to rectifier bridge D7 at 1. # Terminal connections: Phase UB voltage is connected to one end of fuse F5, and the other end of fuse F5 is connected to one end of resistor R16. Resistors R17, R18, R19, and R20 are connected in series. The non-series terminal of resistor R17 is connected to the other end of resistor R16, and the non-series terminal of resistor R20 is connected to the rectifier bridge D7. # Terminal connections: one end of capacitor C14 is connected to the common point where resistors R16 and R17 are connected, and the other end of capacitor C14 is connected to the rectifier bridge D7. # Terminal connections: one end of capacitor C15 is connected to the common point where resistors R16 and R17 are connected, and the other end of capacitor C15 is connected to the rectifier bridge D7. # Terminal connections, rectifier bridge D7's 3 #Terminal output +15V voltage (V15IN_1), rectifier bridge D7 4 # Terminal grounded.

[0033] like Figure 3 As shown, one end of resistor R21 is connected to the 3-pin rectifier bridge D7. # Terminal connection (V15IN_1): The other end of resistor R21 is connected to the cathode of Zener diode Z1, and the anode of Zener diode Z1 is grounded. One end of capacitor C1 is grounded, and the other end of capacitor C1 is connected to the common point where resistor R21 and the cathode of Zener diode Z1 are connected. Resistors R23, R24, R25, and R26 are connected in series. The non-series terminal of resistor R23 is connected to the cathode of diode D13. The anode of diode D13 is connected to the output terminal HV+ of the three-phase rectifier bridge. The non-series terminal of resistor R26 is connected to the three-phase rectifier bridge output terminal HV+. The output terminal HV- of the rectifier bridge is connected to the common point of resistors R25 and R26, which is connected to the cathode of Zener diode Z2. The anode of Zener diode Z2 is connected to the base of transistor Q1. The collector of transistor Q1 is connected to one end of resistor R22 and the anode of LED2. The other end of resistor R22 is connected to the common point of resistor R21 and the cathode of Zener diode Z1. The cathode of LED2 is connected to the output terminal HV- of the three-phase rectifier bridge, and the emitter of transistor Q1 is connected to the output terminal HV- of the three-phase rectifier bridge.

[0034] like Figure 4 As shown, capacitors C3, C4, electrolytic capacitor C5, and TVS transient suppression diode D8 are connected in parallel. The positive terminal of electrolytic capacitor C5 is connected to the common point of connection of R21, C1, Z1, and R22 (+12V DC voltage, V12_1), and the negative terminal of electrolytic capacitor C5 is grounded. One end of resistor R1 is connected to the positive terminal of electrolytic capacitor C5, and the other end of resistor R1 is connected to the anode of LED1. The cathode of LED1 is grounded.

[0035] like Figure 5 As shown, DC / DC power module U2's 1 # Terminal grounding, DC / DC power module U2's 2 # Terminal 3 connects to +12V DC voltage (V12_1), DC / DC power module U2. # Terminal grounding, DC / DC power module U2's 4 # Terminal output +12V DC voltage (V12_2); DC / DC power module U3's 1 # Terminal grounding, DC / DC power module U3's 2 # Terminal 3 is connected to +12V DC voltage (V12_1), DC / DC power module U3. # Terminal grounding, DC / DC power module U3's 4# Terminal outputs +12V DC voltage (V12_3); one end of capacitor C6 is connected to +12V DC voltage (V12_1), and the other end of capacitor C6 is grounded; one end of capacitor C7 is connected to +12V DC voltage (V12_2), and the other end of capacitor C7 is grounded; one end of capacitor C8 is connected to +12V DC voltage (V12_1), and the other end of capacitor C8 is grounded; one end of capacitor C9 is connected to +12V DC voltage (V12_3), and the other end of capacitor C9 is grounded.

[0036] Preferably, the rectifier bridge D7 is an MB10F (1A) surface mount rectifier bridge; the TVS transient suppression diode D8 is an SMBJ15CA; and the DC / DC power module U2 and DC / DC power module U3 are B1212S-1WR3.

[0037] The working principle of a power supply module with phase loss detection is as follows:

[0038] The input AC voltages of phases UA and UB are converted to +15V DC voltage (V15IN_1) by rectifier bridge D7. The +15V DC voltage is then stabilized at +12V DC voltage (V12_1) by Zener diode Z1. The +12V DC voltage (V12_1) is then filtered and protected by a filter circuit. Figure 4 The voltages (as shown) are then input to DC / DC power modules U2 and U3 respectively. DC / DC power module U2 outputs a stable +12V DC voltage (V12_2), and DC / DC power module U3 outputs another stable +12V DC voltage (V12_3) for use by subsequent circuits.

[0039] After the three-phase input is rectified, the output voltage HV+ passes through a forward diode D13, and then is divided by resistors R23, R24, R25, and R26. The divided voltage is then compared with a 12V Zener diode Z2. When the divided voltage is higher than 12V, Zener diode Z2 conducts, passing through resistor R27 and connecting to the base of transistor Q1, causing Q1 to conduct. The collector of transistor Q1 outputs a low level, and the positive terminal of indicator LED2 is connected to the collector of transistor Q1, so LED2 is off. When the divided voltage is lower than 12V, Zener diode Z2 is cut off. At this time, the base of transistor Q1 has no input and is cut off, and the positive terminal of indicator LED2 is connected to the positive power supply V15IN_1 through resistor R22, turning on LED2. By adjusting the resistance value of the voltage divider resistor, the voltage divider voltage is higher than 12V under normal three-phase input, and the indicator LED2 does not light up; when one or two phases of the input are missing, the rectified output voltage HV+ drops, the voltage divider voltage is lower than 12V, and the indicator LED2 lights up, thus serving as a phase loss indicator.

[0040] like Figures 6 to 8 As shown, the voltage regulation isolation module includes: resistors R6, R7, and R10; a resettable fuse F6; an electrolytic capacitor C10; an ESD protection diode D9; a TVS transient suppression diode D10; resistors R2, R3, R4, R11, R12, R13, R14, and R15; a variable resistor R5; capacitors C11 and C13; a dual operational amplifier U5; optocouplers U4 and U7; resistors R8 and R9; a dual operational amplifier U6; a capacitor C12; a TVS transient suppression diode D11; and an ESD protection diode D12.

[0041] like Figure 6 As shown, electrolytic capacitor C10, resistor R10, ESD protection diode D9, and TVS transient voltage suppressor diode D10 are connected in parallel. The ESD protection diode D9 has a 3... # The terminal is connected to the negative terminal of capacitor C10 and grounded, and the ESD protection diode D9 is connected to the ground. # and 2 # The terminal is connected to the positive terminal of electrolytic capacitor C10; the positive terminal of electrolytic capacitor C10 is connected to one end of resettable fuse F6, the other end of resettable fuse F6 is connected to the positive terminal of power supply (IN 0-10V), the negative terminal of electrolytic capacitor C10 is connected to the negative terminal of power supply (IN 0-10V), resistors R6 and R7 are connected in series, wherein the non-series terminal of resistor R6 is connected to the positive terminal of electrolytic capacitor C10, and the non-series terminal (1Z) of resistor R6 is connected to the 3rd terminal of dual operational amplifier U5. # terminal.

[0042] like Figure 7 As shown, resistors R14 and R15 are connected in series. The non-series terminal of resistor R14 is grounded, and the non-series terminal of resistor R15 is connected to the 2Ω terminal of the dual operational amplifier U5. # Terminal connections: Resistor R2 and resistor R3 are connected in series, where the non-series terminal of resistor R2 is connected to terminal 1 of the dual operational amplifier U5. # Terminal connection, the non-series terminal of resistor R3 is connected to the 1 terminal of optocoupler U4. # Terminal connections, 4 of dual operational amplifier U5 # Terminals and 5 # Terminal grounding, 6th terminal of dual operational amplifier U5 # Terminals and 7 # The terminals are connected together, and the 8 terminals of the dual operational amplifier U5 are connected together. # Terminal 2 is connected to +12V DC voltage (V12_2); optocoupler U4's 2 # Terminal 1 of optocoupler U7 # Terminal connection, optocoupler U4's 4 #The terminal is connected to one end of resistor R4, and the other end of resistor R4 is connected to a +12V DC voltage (V12_3). The optocoupler U7 has four terminals connected to this terminal. # The terminal is connected to one end of resistor R13, and the other end of resistor R13 is connected to a +12V DC voltage (V12_2). The optocoupler U7 has two terminals connected to this terminal. # Terminal grounding, optocoupler U7's 3 # Terminals 2 and 2 of dual operational amplifier U5 # Terminal connections: One end of capacitor C11 is connected to +12V DC voltage (V12_2), and the other end of capacitor C11 is grounded; one end of capacitor C13 is connected to one end of resistor R12, and the other end of capacitor C13 is grounded; the other end of resistor R12 is connected to pin 3 of dual operational amplifier U6. # The common point of connection between the terminals, capacitor C13 and resistor R12, and optocoupler U4 is at terminal 3. # The terminals (PXO terminals) are connected, with resistor R11 connected in series with rheostat R5. The non-series terminal of resistor R11 is grounded, and the non-series terminal of rheostat R5 is connected to the common point of connection between capacitor C13 and resistor R12.

[0043] like Figure 8 As shown, one end of resistor R9 is connected to the 1-pin terminal of the dual operational amplifier U6. # Terminal connection, the other end of resistor R9 is connected to the 2 terminal of dual operational amplifier U6. # Terminal connections, 4 of the dual operational amplifier U6 # Terminals and 5 # Terminal grounding, 6th terminal of dual operational amplifier U6 # Terminals and 7 # The terminals are connected together, and the 8 terminals of the dual operational amplifier U6 are connected together. # Terminal 12 is connected to a +12V DC voltage (V12_3); one end of the TVS transient suppression diode D11 is connected to terminal 1 of the dual operational amplifier U6. # Terminal connections: one end of TVS transient voltage suppressor diode D11 is grounded, and one end of resistor R8 is connected to the ESD protection diode D12. # and 2 # Terminal connection, the other end of resistor R8 outputs 0-10V voltage, ESD protection diode D12's 3 # The terminal is grounded; one end of capacitor C12 is connected to a +12V DC voltage (V12_3), and the other end of capacitor C12 is grounded.

[0044] Preferably, the dual operational amplifiers U5 and U6 are of model LM358; the optocouplers U4 and U7 are of model EL817S1(B)(TU)-F; and the ESD protection diode D9 is of model ESD2105L.

[0045] The working principle of the voltage regulation isolation module is as follows:

[0046] The 0-10V (IN0-10V) voltage input is reduced to 0-2.4V (OUTA terminal of U5) by dual operational amplifier U5, and then output to 0-2.4V (PX0 terminal of U4) through dual optocoupler isolation. The 0-2.4V is then input again (OP_IN terminal) to dual operational amplifier U6, which synchronously amplifies it to 0-10V to achieve isolated output. The variable resistor R5 is used for voltage regulation.

[0047] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A three phase LED lighting rectifying dimming circuit with open phase detection, characterized in that, include: The system includes a surge protection rectifier module, a phase loss detection power supply module, and a voltage regulation isolation module. The input terminal of the surge protection rectifier module is connected to a three-phase voltage. The positive terminal (HV+) and the negative terminal (HV-) of the DC output terminal of the surge protection rectifier module are respectively connected to the phase loss detection power supply module. The phase loss detection power supply module is connected to the voltage regulation isolation module. The phase loss detection power supply module includes a phase loss detection unit, which comprises: resistors R22, R23, R24, R25, R26, and R27; a Zener diode Z2; a diode D13; an LED2; and a transistor Q1. Resistors R23, R24, R25, and R26 are connected in series. The non-series terminal of resistor R23 is connected to the cathode of diode D13, and the anode of diode D13 is connected to the positive DC output terminal. The HV+ terminal of resistor R26 is connected to the negative terminal HV- of the DC output. The common point of resistors R25 and R26 is connected to the cathode of Zener diode Z2. The anode of Zener diode Z2 is connected to the base of transistor Q1. The collector of transistor Q1 is connected to one end of resistor R22 and the anode of LED2. The other end of resistor R22 is connected to a DC voltage. The cathode of LED2 and the emitter of transistor Q1 are both connected to the negative terminal HV- of the DC output.

2. The three phase LED lighting rectifying dimming circuit with open phase detection as claimed in claim 1 wherein, The lightning protection rectifier module includes: fuses F1~F3, varistors RV1~RV3, gas discharge tube TV1, and diodes D1~D6; wherein, diodes D1~D6 form a three-phase rectifier bridge, one end of fuses F1~F3 is connected to the three-phase voltages UA, UB, and UC respectively, and the other end of fuses F1~F3 is connected to the three-phase input terminals A, B, and C of the three-phase rectifier bridge respectively, and the output terminal of the three-phase rectifier bridge outputs DC voltage, one end of varistors RV1~RV3 is connected to the three-phase input terminals A, B, and C respectively, and the other end of varistors RV1~RV3 is connected together and then connected to one end of gas discharge tube TV1, and the other end of gas discharge tube TV1 is grounded.

3. The three phase LED lighting rectifying dimming circuit with open phase detection as claimed in claim 2 wherein, The power module with phase loss detection includes: fuse F5, resistors R16, R17, R18, R19, and R20, capacitors C14 and C15, and rectifier bridge D7; the UA phase voltage is connected to 1 / 2 of rectifier bridge D7. # Terminal connections: Phase UB voltage is connected to one end of fuse F5, and the other end of fuse F5 is connected to one end of resistor R16. Resistors R17, R18, R19, and R20 are connected in series. The non-series terminal of resistor R17 is connected to the other end of resistor R16, and the non-series terminal of resistor R20 is connected to the rectifier bridge D7. # Terminal connections: one end of capacitor C14 is connected to the common point where resistors R16 and R17 are connected, and the other end of capacitor C14 is connected to the rectifier bridge D7. # Terminal connections: one end of capacitor C15 is connected to the common point where resistors R16 and R17 are connected, and the other end of capacitor C15 is connected to the rectifier bridge D7. # Terminal connection, rectifier bridge D7's 3 # Terminal output voltage, rectifier bridge D7's 4 # Terminal grounded.

4. The three phase LED lighting rectifying dimming circuit with open phase detection as claimed in claim 3, wherein, The power supply module with phase loss detection also includes: resistor R21, capacitor C1, and Zener diode Z1; one end of resistor R21 is connected to the rectifier bridge D7. # Terminal connections: the other end of resistor R21 is connected to the cathode of Zener diode Z1, the anode of Zener diode Z1 is grounded, one end of capacitor C1 is grounded, and the other end of capacitor C1 is connected to the common connection point of resistor R21 and the cathode of Zener diode Z1. The collector of transistor Q1 is connected to one end of resistor R22 and the anode of light-emitting diode LED2, and the other end of resistor R22 is connected to the common connection point of resistor R21 and the cathode of Zener diode Z1.

5. The three phase LED lighting rectifying dimming circuit with open phase detection as claimed in claim 4 wherein, The power module with phase loss detection further includes: resistor R1, capacitors C3 and C4, electrolytic capacitor C5, light-emitting diode LED1, and TVS transient voltage suppressor diode D8; capacitors C3, C4, C5, and D8 are connected in parallel, the positive terminal of electrolytic capacitor C5 is connected to the common point of connection of R21, C1, Z1, and R22, the negative terminal of electrolytic capacitor C5 is grounded, one end of resistor R1 is connected to the positive terminal of electrolytic capacitor C5, the other end of resistor R1 is connected to the anode of light-emitting diode LED1, and the cathode of light-emitting diode LED1 is grounded.

6. The three phase LED lighting rectifying dimming circuit with open phase detection as claimed in claim 5 wherein, The power module with phase loss detection further includes: DC / DC power module U2, DC / DC power module U3, capacitors C6, C7, C8, and C9; and 1 of DC / DC power module U2. # Terminal grounding, DC / DC power module U2's 2 # The terminals are connected to DC voltage, and the 3rd terminal of the DC / DC power module U2 is connected to DC voltage. # Terminal grounding, DC / DC power module U2's 4 # Terminal output DC voltage; DC / DC power module U3's 1 # Terminal grounding, DC / DC power module U3's 2 # The terminal is connected to DC voltage, DC / DC power module U3's 3 # Terminal grounding, DC / DC power module U3's 4 # The terminal outputs DC voltage; one end of capacitor C6 is connected to DC voltage, and the other end of capacitor C6 is grounded; one end of capacitor C7 is connected to DC voltage, and the other end of capacitor C7 is grounded; one end of capacitor C8 is connected to DC voltage, and the other end of capacitor C8 is grounded; one end of capacitor C9 is connected to DC voltage, and the other end of capacitor C9 is grounded.

7. The three phase LED lighting rectifying dimming circuit with open phase detection as claimed in claim 6 wherein, The voltage regulation isolation module includes: resistors R6, R7, and R10; a resettable fuse F6; an electrolytic capacitor C10; an ESD protection diode D9; and a TVS transient voltage suppressor diode D10. The electrolytic capacitor C10, resistor R10, ESD protection diode D9, and TVS transient voltage suppressor diode D10 are connected in parallel. The ESD protection diode D9 has a 3-volt... # The terminal is connected to the negative terminal of capacitor C10 and grounded, and the ESD protection diode D9 is connected to the ground. # and 2 # The terminal is connected to the positive terminal of electrolytic capacitor C10; the positive terminal of electrolytic capacitor C10 is connected to one end of resettable fuse F6, the other end of resettable fuse F6 is connected to the positive terminal of the power supply, the negative terminal of electrolytic capacitor C10 is connected to the negative terminal of the power supply, resistors R6 and R7 are connected in series, wherein the non-series terminal of resistor R6 is connected to the positive terminal of electrolytic capacitor C10, and the non-series terminal of resistor R6 is connected to terminal 3 of dual operational amplifier U5. # terminal.

8. The three phase LED lighting rectifying dimming circuit with open phase detection as claimed in claim 7 wherein, The voltage regulation isolation module further includes: resistors R2, R3, R4, R11, R12, R13, R14, and R15; a variable resistor R5; capacitors C11 and C13; a dual operational amplifier U5; and optocouplers U4 and U7. Resistors R14 and R15 are connected in series, with the non-series terminal of resistor R14 grounded, and the non-series terminal of resistor R15 connected to the dual operational amplifier U5. # Terminal connections: Resistor R2 and resistor R3 are connected in series, where the non-series terminal of resistor R2 is connected to terminal 1 of the dual operational amplifier U5. # Terminal connection, the non-series terminal of resistor R3 is connected to the 1 terminal of optocoupler U4. # Terminal connections, 4 of dual operational amplifier U5 # Terminals and 5 # Terminal grounding, 6th terminal of dual operational amplifier U5 # Terminals and 7 # The terminals are connected together, and the 8 terminals of the dual operational amplifier U5 are connected together. # Terminal 2 is connected to DC voltage; optocoupler U4's 2 # Terminal 1 of optocoupler U7 # Terminal connection, optocoupler U4's 4 # Terminal 4 is connected to one end of resistor R4, and the other end of resistor R4 is connected to a DC voltage. The optocoupler U7 has terminal 4... # The terminal is connected to one end of resistor R13, and the other end of resistor R13 is connected to a DC voltage. The optocoupler U7 has two terminals connected to this terminal. # Terminal grounding, optocoupler U7's 3 # Terminals 2 and 2 of dual operational amplifier U5 # Terminal connections: One end of capacitor C11 is connected to DC voltage, and the other end of capacitor C11 is grounded; one end of capacitor C13 is connected to one end of resistor R12, and the other end of capacitor C13 is grounded; the other end of resistor R12 is connected to terminal 3 of dual operational amplifier U6. # The common point of connection between the terminals, capacitor C13 and resistor R12, and optocoupler U4 is at terminal 3. # The terminals are connected in series: resistor R11 is connected in series with rheostat R5, and the non-series terminal of resistor R11 is grounded. The non-series terminal of rheostat R5 is connected to the common point of connection between capacitor C13 and resistor R12.

9. The three phase LED lighting rectifying dimming circuit with open phase detection as claimed in claim 8 wherein, The voltage regulation isolation module also includes: resistors R8 and R9, a dual operational amplifier U6, a capacitor C12, a TVS transient suppression diode D11, and an ESD electrostatic protection diode D12; one end of resistor R9 is connected to the voltage across the dual operational amplifier U6. # Terminal connection, the other end of resistor R9 is connected to the 2 terminal of dual operational amplifier U6. # Terminal connections, 4 of the dual operational amplifier U6 # Terminals and 5 # Terminal grounding, 6th terminal of dual operational amplifier U6 # Terminals and 7 # The terminals are connected together, and the 8 terminals of the dual operational amplifier U6 are connected together. # The terminal is connected to a DC voltage; one end of the TVS transient suppression diode D11 is connected to the 1 terminal of the dual operational amplifier U6. # Terminal connections: one end of TVS transient voltage suppressor diode D11 is grounded, and one end of resistor R8 is connected to the ESD protection diode D12. # and 2 # Terminal connection, the other end of resistor R8 outputs voltage, ESD protection diode D12's 3 # The terminal is grounded; one end of capacitor C12 is connected to DC voltage, and the other end of capacitor C12 is grounded.

Images