High-power constant-voltage driving power supply

Abstract

The utility model discloses a high-power constant-voltage driving power supply, which relates to the field of voltage supply, and comprises a rectifying and filtering module, a power control module, a constant-voltage driving module and a constant-voltage driving module, and is characterized in that the rectifying and filtering module is used for converting commercial power voltage into direct current and outputting the direct current to the power control module; the power control module is used for outputting constant-voltage alternating current to the load filtering module; a feedback signal of the optocoupler control module is received, and the working frequency is adjusted; the load filtering module is used for filtering the input direct current and then supplying power to a load; the optocoupler control module is used for feeding back a signal to the power control module; compared with the prior art, the beneficial effects of the utility model are that a stabilized power supply is provided through a chip of the power control module, then filtering is carried out through the load filtering module to supply power to an illumination load, and stable voltage and constant current with corresponding power can be provided when the illumination lamp changes in a power range allowed by the illumination lamp; the LED lamp has the advantages of stable voltage, no stroboflash of light, high power and the like, and the current can change along with the actual power of the lamp.

Description

Technical Field

[0001] The utility model relates to the field of voltage supply, in particular to a high-power constant-voltage driving power supply. Background Art

[0002] With the rapid development of LED technology, LED lighting is becoming more and more popular in the market. As an important part of LED lighting system, constant voltage drive power supply has the advantages of high efficiency, energy saving and environmental protection.

[0003] The traditional driving power supply has the problem of low power and needs to be improved. Utility Model Content

[0004] The purpose of the utility model is to provide a high-power constant-voltage driving power supply to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A high-power constant-voltage driving power supply, comprising:

[0007] The rectifier and filter module is used to convert the mains voltage into direct current and output it to the power control module;

[0008] The power control module is used to output constant voltage AC power to the load filter module; receive the feedback signal from the optocoupler control module and adjust the operating frequency;

[0009] A load filter module is used to filter the input DC power and then supply power to the load;

[0010] The optocoupler control module is used to sample the output voltage of the load filter module and feed it back to the power control module;

[0011] The output end of the rectifier filter module is connected to the first input end of the power control module, the output end of the power control module is connected to the input end of the load filter module, the output end of the load filter module is connected to the input end of the optocoupler control module, and the output end of the optocoupler control module is connected to the second input end of the power control module.

[0012] As a further solution of the utility model: the rectifier and filter module includes a rectifier BD1, a capacitor EC1, and a capacitor EC2. The third end of the rectifier BD1 is connected to the live wire ACL through a fuse F1, the second end of the rectifier BD1 is connected to the neutral wire ACN through a thermistor NTC1, the fourth end of the rectifier BD1 is grounded, the first end of the rectifier BD1 is connected to one end of the capacitor EC1, one end of the capacitor EC2, and the input end of the power control module, the other end of the capacitor EC1 is grounded, the other end of the capacitor EC2 is grounded, and the second and third ends of the rectifier BD1 are connected in series through a varistor MOV3.

[0013] As a further solution of the utility model: the power control module includes a chip U1, a field effect tube Q1, and a field effect tube Q2. The D pole of the field effect tube Q1 is connected to the output end of the rectifier and filter module, the S pole of the field effect tube Q1 is connected to the D pole of the field effect tube Q2 and the first end of the transformer T1, the G pole of the field effect tube Q1 is connected to one end of the resistor R29, the positive pole of the diode D10, the negative pole of the diode D10 is connected to the other end of the resistor R29, and the No. 15 pin of the chip U1, the No. 12 pin of the chip U1 is connected to one end of the resistor R27, the negative pole of the diode D7, the other end of the resistor R27 is connected to the positive pole of the diode D7, the G pole of the field effect tube Q2, the S pole of the field effect tube Q2 is grounded, the second end of the transformer T1 is connected to one end of the capacitor C5B, and the other end of the capacitor C5B One end of resistor RS1, one end of capacitor C25, and the positive electrode of diode D11 are connected, and the other end of resistor RS1 is grounded. The other end of capacitor C25 is connected to the negative electrode of diode D11 and one end of resistor R21. The other end of resistor R21 is connected to pin 10 of chip U1. Pin 7 of chip U1 is connected to the third end of transformer T1 through resistor R49. The fourth end of transformer T1 is grounded. Pin 5 of chip U1 is connected to the output end of the optocoupler control module, one end of capacitor C6, and one end of resistor R24. The other end of capacitor C6 is grounded. The other end of resistor R24 ​​is connected to one end of resistor R9 and one end of resistor R8. The other end of resistor R9 is grounded. The other end of resistor R8 is connected to pin 4 of chip U1. The model of chip U1 is LZC3016A.

[0014] As a further solution of the utility model: the load filtering module includes a diode string D12, a diode string D14, a capacitor EC7, a capacitor EC8, a capacitor EC9, and a capacitor EC11. The diode string is composed of two diodes in parallel. The negative pole of the diode string D14 is connected to the fifth end of the transformer T1, the positive pole of the diode string D14 is grounded, the positive pole of the diode string D12 is grounded, the negative pole of the diode string D12 is connected to the seventh end of the transformer T1, the sixth end of the transformer T1 is connected to one end of the capacitor EC7, one end of the capacitor EC8, one end of the capacitor EC9, one end of the capacitor EC11, and one end of the resistor R45. The other end of the capacitor EC7 is grounded, the other end of the capacitor EC8 is grounded, the other end of the capacitor EC9 is grounded, the other end of the capacitor EC11 is grounded, and the other end of the resistor R45 is grounded.

[0015] As a further solution of the utility model: the optocoupler control module includes an optocoupler U3, a first end of the optocoupler U3 is connected to the positive electrode of the diode D16 and one end of the resistor R10B, the negative electrode of the diode D16 is connected to one end of the resistor R35, the other end of the resistor R35 is connected to one end of the resistor R40 and the output end of the load filtering module, the other end of the resistor R40 is connected to one end of the resistor R39, the other end of the resistor R39 is connected to one end of the capacitor C42, one end of the capacitor C22, one end of the resistor R36, one end of the resistor R38, and a reference electrode of a controllable precision voltage-stabilizing source Z5, the positive electrode of the controllable precision voltage-stabilizing source Z5 is grounded, the other end of the capacitor C22 is grounded, the other end of the resistor R38 is grounded, the other end of the resistor R36 is grounded, the negative electrode of the controllable precision voltage-stabilizing source Z5 is connected to the other end of the resistor R10B, the other end of the capacitor C42, and the second end of the optocoupler U3, the third end of the optocoupler U3 is grounded, and the fourth end of the optocoupler U3 is connected to the second input end of the power control module.

[0016] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model provides a regulated power supply through the chip of the power control module, and then filters through the load filter module to supply power to the lighting load. It can provide a stable voltage and a constant current of corresponding power when the power changes within the power range allowed by the lighting fixture. It has the advantages of stable voltage, no flickering of light, the current can change with the actual power of the lamp, and high power. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The figure is a circuit diagram of a high-power constant-voltage driving power supply. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0019] See also Figure 1 , a high-power constant-voltage driving power supply, comprising:

[0020] The rectifier and filter module is used to convert the mains voltage into direct current and output it to the power control module;

[0021] The power control module is used to output constant voltage AC power to the load filter module; receive the feedback signal from the optocoupler control module and adjust the operating frequency;

[0022] A load filter module is used to filter the input DC power and then supply power to the load;

[0023] The optocoupler control module is used to sample the output voltage of the load filter module and feed it back to the power control module;

[0024] The output end of the rectifier filter module is connected to the first input end of the power control module, the output end of the power control module is connected to the input end of the load filter module, the output end of the load filter module is connected to the input end of the optocoupler control module, and the output end of the optocoupler control module is connected to the second input end of the power control module.

[0025] In this example: See Figure 1 The rectifier and filter module includes a rectifier BD1, a capacitor EC1, and a capacitor EC2. The third end of the rectifier BD1 is connected to the live wire ACL through a fuse F1, the second end of the rectifier BD1 is connected to the neutral wire ACN through a thermistor NTC1, the fourth end of the rectifier BD1 is grounded, the first end of the rectifier BD1 is connected to one end of the capacitor EC1, one end of the capacitor EC2, and the input end of the power control module, the other end of the capacitor EC1 is grounded, the other end of the capacitor EC2 is grounded, and the second and third ends of the rectifier BD1 are connected in series through a varistor MOV3.

[0026] The thermistor NTC1 can effectively prevent surge current because all instantaneous energy is consumed in the thermistor NTC1. After a certain period of time, the temperature rises and the thermistor resistance decreases, and the subsequent circuit operates normally. The varistor MOV3 is provided to prevent the abnormal fluctuation of the mains from damaging the rectifier BD1. The rectifier BD1 is used to convert AC power into DC power, and the capacitors EC1 and EC2 implement filtering processing. After passing through the rectifier BD1, the capacitor EC1 and the capacitor EC2, the AC power is converted into a stable DC power.

[0027] In this example: See Figure 1The power control module includes a chip U1, a field effect tube Q1, and a field effect tube Q2. The D pole of the field effect tube Q1 is connected to the output end of the rectifier and filter module, the S pole of the field effect tube Q1 is connected to the D pole of the field effect tube Q2 and the first end of the transformer T1, the G pole of the field effect tube Q1 is connected to one end of the resistor R29, the positive pole of the diode D10, the negative pole of the diode D10 is connected to the other end of the resistor R29 and the No. 15 pin of the chip U1, the No. 12 pin of the chip U1 is connected to one end of the resistor R27 and the negative pole of the diode D7, the other end of the resistor R27 is connected to the positive pole of the diode D7 and the G pole of the field effect tube Q2, the S pole of the field effect tube Q2 is grounded, the second end of the transformer T1 is connected to one end of the capacitor C5B, and the other end of the capacitor C5B is connected to the resistor RS1 One end of the optical coupling control module, one end of the capacitor C6, one end of the resistor R24, the other end of the capacitor C6 is grounded, the other end of the resistor R24 ​​is connected to one end of the resistor R9 and one end of the resistor R8, the other end of the resistor R9 is grounded, and the other end of the resistor R8 is connected to the pin 4 of the chip U1. The model of the chip U1 is LZC3016A.

[0028] The voltage provides the working voltage for the chip U1 through the starting resistors R4 and R6. The chip U1 controls the voltage generated on the transformer T1 by controlling the conduction state of the field effect tubes Q1 and Q2. The negative pole of the primary side of the transformer T1 is connected to the voltage sampling terminal (pin 7) of the chip through the capacitor C5B, the diode D11, the capacitor C25, and the resistor R21. The chip U1 adjusts the conduction state of the field effect tubes Q1 and Q2 based on the sampling signal, thereby generating a stable voltage on the transformer T1.

[0029] Diodes D10 and D7 prevent the driving pin of chip U1 from outputting excessive power and damaging field effect transistors Q1 and Q2.

[0030] The output voltage of transformer T1 is processed by the load filter module and then sampled by the optocoupler control module and fed back to the 5th pin of chip U1. The diode D11 and capacitor C25 are connected in parallel to chip U1; the reverse-connected diode D11 can prevent the reverse current produced by the magnetic field of the electronic components from impacting chip U1. The resistor RS1 is used as the current sampling resistor of the current sampling terminal CS (pin 10) of chip U1. By adjusting the size of the resistor RS1, the constant current point (maximum value) of the output current of the power control module can be set.

[0031] In this example: See Figure 1The load filtering module includes a diode string D12, a diode string D14, a capacitor EC7, a capacitor EC8, a capacitor EC9, and a capacitor EC11. The diode string is composed of two diodes in parallel. The negative pole of the diode string D14 is connected to the fifth end of the transformer T1, the positive pole of the diode string D14 is grounded, the positive pole of the diode string D12 is grounded, the negative pole of the diode string D12 is connected to the seventh end of the transformer T1, the sixth end of the transformer T1 is connected to one end of the capacitor EC7, one end of the capacitor EC8, one end of the capacitor EC9, one end of the capacitor EC11, and one end of the resistor R45. The other end of the capacitor EC7 is grounded, the other end of the capacitor EC8 is grounded, the other end of the capacitor EC9 is grounded, the other end of the capacitor EC11 is grounded, and the other end of the resistor R45 is grounded.

[0032] The output voltage of transformer T1 is filtered by diode string D12, diode string D14, capacitor EC7, capacitor EC8, capacitor EC9, and capacitor EC11, and then a stable DC power is output to supply the lamp load. After the system is powered off, resistor R45 can discharge capacitors EC7, EC8, EC9, and EC11 to eliminate the afterglow of the lamp load.

[0033] In this example: See Figure 1 The optocoupler control module includes an optocoupler U3, a first end of the optocoupler U3 is connected to the positive electrode of the diode D16 and one end of the resistor R10B, a negative electrode of the diode D16 is connected to one end of the resistor R35, the other end of the resistor R35 is connected to one end of the resistor R40 and the output end of the load filter module, the other end of the resistor R40 is connected to one end of the resistor R39, the other end of the resistor R39 is connected to one end of the capacitor C42, one end of the capacitor C22, one end of the resistor R36, one end of the resistor R38, and a reference electrode of a controllable precision voltage-stabilizing source Z5, the positive electrode of the controllable precision voltage-stabilizing source Z5 is grounded, the other end of the capacitor C22 is grounded, the other end of the resistor R38 is grounded, the other end of the resistor R36 is grounded, the negative electrode of the controllable precision voltage-stabilizing source Z5 is connected to the other end of the resistor R10B, the other end of the capacitor C42, and the second end of the optocoupler U3, the third end of the optocoupler U3 is grounded, and the fourth end of the optocoupler U3 is connected to the second input end of the power control module.

[0034] The output voltage of the load filter module is sampled by the optocoupler U3, isolated by the optocoupler, and fed back to pin 6 of the chip U1 after isolation. Pin 6 of the chip U1 is the burst mode setting pin. The ENA pin detects the voltage related to the feedback control, which is compared with the internal reference voltage of 1.26V to select whether to enter the burst mode.

[0035] The working principle of the utility model is: the rectifier filter module is used to convert the mains voltage into direct current and output it to the power control module; the power control module is used to output constant voltage alternating current to the load filter module; the feedback signal of the optical coupling control module is received to adjust the working frequency; the load filter module is used to filter the input direct current and then supply power to the load; the optical coupling control module is used to sample the output voltage of the load filter module and feed it back to the power control module.

[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0037] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A high-power constant-voltage driving power supply, characterized in that: The high-power constant voltage drive power supply includes: The rectifier and filter module is used to convert the mains voltage into direct current and output it to the power control module; The power control module is used to output constant voltage AC power to the load filter module; receive the feedback signal from the optocoupler control module and adjust the operating frequency; A load filter module is used to filter the input DC power and then supply power to the load; The optocoupler control module is used to sample the output voltage of the load filter module and feed it back to the power control module; The output end of the rectifier filter module is connected to the first input end of the power control module, the output end of the power control module is connected to the input end of the load filter module, the output end of the load filter module is connected to the input end of the optocoupler control module, and the output end of the optocoupler control module is connected to the second input end of the power control module.

2. The high-power constant-voltage driving power supply according to claim 1, characterized in that: The rectifier and filter module includes a rectifier BD1, a capacitor EC1, and a capacitor EC2. The third end of the rectifier BD1 is connected to the live wire ACL through a fuse F1, the second end of the rectifier BD1 is connected to the neutral wire ACN through a thermistor NTC1, the fourth end of the rectifier BD1 is grounded, the first end of the rectifier BD1 is connected to one end of the capacitor EC1, one end of the capacitor EC2, and the input end of the power control module, the other end of the capacitor EC1 is grounded, the other end of the capacitor EC2 is grounded, and the second and third ends of the rectifier BD1 are connected in series through a varistor MOV3.

3. The high-power constant-voltage driving power supply according to claim 1, characterized in that: The power control module includes a chip U1, a field effect tube Q1, and a field effect tube Q2. The D pole of the field effect tube Q1 is connected to the output end of the rectifier and filter module, the S pole of the field effect tube Q1 is connected to the D pole of the field effect tube Q2 and the first end of the transformer T1, the G pole of the field effect tube Q1 is connected to one end of the resistor R29, the positive pole of the diode D10, the negative pole of the diode D10 is connected to the other end of the resistor R29, and the No. 15 pin of the chip U1, the No. 12 pin of the chip U1 is connected to one end of the resistor R27, the negative pole of the diode D7, the other end of the resistor R27 is connected to the positive pole of the diode D7, the G pole of the field effect tube Q2, the S pole of the field effect tube Q2 is grounded, the second end of the transformer T1 is connected to one end of the capacitor C5B, and the other end of the capacitor C5B is connected to the resistor RS1. One end, one end of capacitor C25, the positive electrode of diode D11, the other end of resistor RS1 is grounded, the other end of capacitor C25 is connected to the negative electrode of diode D11 and one end of resistor R21, the other end of resistor R21 is connected to pin 10 of chip U1, pin 7 of chip U1 is connected to the third end of transformer T1 through resistor R49, the fourth end of transformer T1 is grounded, pin 5 of chip U1 is connected to the output end of the optocoupler control module, one end of capacitor C6, one end of resistor R24, the other end of capacitor C6 is grounded, the other end of resistor R24 ​​is connected to one end of resistor R9 and one end of resistor R8, the other end of resistor R9 is grounded, the other end of resistor R8 is connected to pin 4 of chip U1, and the model of chip U1 is LZC3016A.

4. The high-power constant-voltage driving power supply according to claim 1, characterized in that: The load filtering module includes a diode string D12, a diode string D14, a capacitor EC7, a capacitor EC8, a capacitor EC9, and a capacitor EC11. The diode string is composed of two diodes in parallel. The negative pole of the diode string D14 is connected to the fifth end of the transformer T1, the positive pole of the diode string D14 is grounded, the positive pole of the diode string D12 is grounded, the negative pole of the diode string D12 is connected to the seventh end of the transformer T1, the sixth end of the transformer T1 is connected to one end of the capacitor EC7, one end of the capacitor EC8, one end of the capacitor EC9, one end of the capacitor EC11, and one end of the resistor R45. The other end of the capacitor EC7 is grounded, the other end of the capacitor EC8 is grounded, the other end of the capacitor EC9 is grounded, the other end of the capacitor EC11 is grounded, and the other end of the resistor R45 is grounded.

5. The high-power constant-voltage driving power supply according to claim 3, characterized in that: The optocoupler control module includes an optocoupler U3, a first end of the optocoupler U3 is connected to the positive electrode of the diode D16 and one end of the resistor R10B, a negative electrode of the diode D16 is connected to one end of the resistor R35, the other end of the resistor R35 is connected to one end of the resistor R40 and the output end of the load filtering module, the other end of the resistor R40 is connected to one end of the resistor R39, the other end of the resistor R39 is connected to one end of the capacitor C42, one end of the capacitor C22, one end of the resistor R36, one end of the resistor R38, and a reference electrode of a controllable precision voltage-stabilizing source Z5, the positive electrode of the controllable precision voltage-stabilizing source Z5 is grounded, the other end of the capacitor C22 is grounded, the other end of the resistor R38 is grounded, the other end of the resistor R36 is grounded, the negative electrode of the controllable precision voltage-stabilizing source Z5 is connected to the other end of the resistor R10B, the other end of the capacitor C42, and the second end of the optocoupler U3, the third end of the optocoupler U3 is grounded, and the fourth end of the optocoupler U3 is connected to the second input end of the power control module.

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