Voltage-stabilizing filtering output circuit of brick-shaped power supply

Abstract

The utility model discloses a voltage-stabilizing filtering output circuit of a brick-shaped power supply, and belongs to the technical field of power supplies. The voltage stabilizing and filtering output circuit of the brick-shaped power supply comprises the brick-shaped power supply, a first transformer, a second transformer, a first diode, a second diode, a third diode, a fourth diode, a first capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor and a first resistor. And a second resistor, a current positive input end, a current negative input end, a current positive output end and a current negative output end. According to the utility model, the brick-shaped power supply can output high-quality current.

Description

Technical Field

[0001] The utility model belongs to the technical field of power supplies, and particularly relates to a voltage-stabilizing and filtering output circuit for a brick-shaped power supply. Background Art

[0002] Brick-shaped power supplies have the characteristics of small size, high power, modular packaging, etc., and are widely used in the fields of electronic communication, industrial automatic control, medical equipment, aerospace, as well as outdoor activities, travel, emergency rescue, etc. Due to the existence of electromagnetic interference in the circuit, it will affect the stability of the current at the output end of the brick-shaped power supply, etc. Therefore, it is necessary to stabilize the voltage and filter the output current of the brick-shaped power supply. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a voltage-stabilizing and filtering output circuit for a brick-shaped power supply.

[0004] The purpose of the utility model is achieved by the following technical solutions: A voltage-stabilizing and filtering output circuit for a brick-shaped power supply, including a brick-shaped power supply, a first transformer, a second transformer, a first diode, a second diode, a third diode, a fourth diode, a first capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a first resistor, a second resistor, a current positive input terminal, a current negative input terminal, a current positive output terminal, and a current negative output terminal;

[0005] The first diode is connected in series between the current positive input terminal and the first end of the primary coil of the first transformer;

[0006] The second diode is connected in series between the current negative input terminal and the first end of the primary coil of the first transformer;

[0007] The first capacitor is connected in series between the first end and the second end of the primary coil of the first transformer;

[0008] The third diode is connected in series between the first end and the second end of the primary coil of the first transformer;

[0009] The first end of the secondary coil of the first transformer is connected to the positive input terminal of the brick-shaped power supply, and the second end of the secondary coil of the first transformer is connected to the negative input terminal of the brick-shaped power supply;

[0010] The fourth capacitor is connected in series between the first end and the second end of the secondary coil of the first transformer;

[0011] The fifth capacitor and the sixth capacitor are connected in series and then connected in series between the first end and the second end of the secondary coil of the first transformer, and the common point of the fifth capacitor and the sixth capacitor is grounded;

[0012] The first resistor is connected in series between the positive output terminal of the brick-shaped power supply and the neutral point of the positive compensation terminal, and the second resistor is connected in series between the negative output terminal of the brick-shaped power supply and the neutral point of the negative compensation terminal;

[0013] The positive output terminal of the brick-shaped power supply is connected to the first end of the primary coil of the second transformer, and the negative output terminal of the brick-shaped power supply is connected to the second end of the primary coil of the second transformer;

[0014] The fourth diode is connected in series between the first end and the second end of the primary coil of the second transformer;

[0015] The seventh capacitor and the eighth capacitor are connected in series and then connected in series between the first end and the second end of the primary coil of the second transformer, and the common point of the seventh capacitor and the eighth capacitor is grounded;

[0016] The eleventh capacitor is connected in series between the first end and the second end of the secondary coil of the second transformer;

[0017] The twelfth capacitor and the thirteenth capacitor are connected in series and then connected in series between the first end and the second end of the secondary coil of the second transformer, and the common point of the twelfth capacitor and the thirteenth capacitor is grounded;

[0018] The fourteenth capacitor is connected in series between the first end and the second end of the secondary coil of the second transformer;

[0019] The first end of the secondary coil of the second transformer is connected to the positive current output terminal, and the second end of the secondary coil of the second transformer is connected to the negative current output terminal.

[0020] Further, the voltage stabilizing and filtering output circuit of the brick-shaped power supply further includes a fuse, and the fuse is connected in series between the positive current input terminal and the first diode.

[0021] Further, the voltage stabilizing and filtering output circuit of the brick-shaped power supply further includes a second capacitor, a third capacitor, a ninth capacitor and a tenth capacitor;

[0022] The second capacitor is connected in series between the first end and the second end of the primary coil of the first transformer;

[0023] The third capacitor is connected in series between the first end and the second end of the secondary coil of the first transformer;

[0024] The ninth capacitor is connected in series between the first end and the second end of the primary coil of the second transformer;

[0025] The tenth capacitor is connected in series between the first end and the second end of the secondary coil of the second transformer.

[0026] Further, the voltage stabilizing and filtering output circuit of the brick-shaped power supply further includes a light-emitting diode, which is connected in series between the positive current output terminal and the negative current output terminal.

[0027] Further, a group of common-mode inductors are provided on one side of the primary coil of the second transformer.

[0028] Further, the first diode and the second diode are single-pass diodes, and the third diode and the fourth diode are transient suppression diodes.

[0029] Further, the first capacitor and the ninth capacitor are electrolytic capacitors, the fourth capacitor and the fourteenth capacitor are tantalum capacitors, and the fifth capacitor, the sixth capacitor, the seventh capacitor, the eighth capacitor, the twelfth capacitor and the thirteenth capacitor are Y safety capacitors.

[0030] Further, the specifications of the second capacitor, the third capacitor, the ninth capacitor and the tenth capacitor are: the rated voltage is less than or equal to 100V, and the capacitance value is 4-10uF; or, the rated voltage is greater than 100V, and the capacitance value is 0.8-4uF.

[0031] The specifications of the fourth capacitor and the fourteenth capacitor are: the rated current is less than 3A, and the capacitance value is 50-100uF; or, the rated current is 3-10A, and the capacitance value is 100-500uF; or, the rated current is 10-20A, and the capacitance value is 200uF-1000uF; or, the rated current is 20-30A, and the capacitance value is 500uF-2500uF; or, the rated current is 30-100A, and the capacitance value is 2000uF-5000uF.

[0032] Further, the specifications of the common-mode inductor are: the rated power is less than or equal to 1W, and the inductance value is 150uH; or, the rated power is greater than 1W, and the inductance value is 600-1300uH.

[0033] The beneficial effect of the present utility model is that the present utility model improves the quality of the output current of the brick-shaped power supply. Description of the Drawings

[0034] Figure 1 It is the circuit diagram of the voltage stabilizing and filtering output circuit of the brick-shaped power supply in the present utility model. Detailed Embodiments

[0035] Next, the technical solutions of the present utility model will be clearly and completely described in conjunction with the embodiments. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts fall within the protection scope of the present utility model.

[0036] Refer to Figure 1 , this embodiment provides a voltage-stabilizing and filtering output circuit for a brick-shaped power supply:

[0037] As Figure 1 shown, a voltage-stabilizing and filtering output circuit for a brick-shaped power supply includes a brick-shaped power supply U1, a first transformer T1, a second transformer T2, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a first capacitor C1, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a first resistor R1, a second resistor R2, a current positive input terminal, a current negative input terminal, a current positive output terminal, and a current negative output terminal.

[0038] The anode of the first diode D1 is connected to the current positive input terminal, and the cathode of the first diode D1 is connected to the first end of the primary coil of the first transformer T1.

[0039] The anode of the second diode D2 is connected to the current negative input terminal, and the cathode of the second diode D2 is connected to the second end of the primary coil of the first transformer T1.

[0040] One end of the first capacitor C1 is connected to the first end of the primary coil of the first transformer T1, and the other end of the first capacitor C1 is connected to the second end of the primary coil of the first transformer T1.

[0041] The anode of the third diode D3 is connected to the second end of the primary coil of the first transformer T1, and the cathode of the third diode D3 is connected to the first end of the primary coil of the first transformer T1.

[0042] The first end of the secondary coil of the first transformer T1 is connected to the positive input terminal of the brick-shaped power supply U1, and the second end of the secondary coil of the first transformer T1 is connected to the negative input terminal of the brick-shaped power supply U1.

[0043] One end of the fourth capacitor C4 is connected to the first end of the secondary coil of the first transformer T1, and the other end of the fourth capacitor C4 is connected to the second end of the secondary coil of the first transformer T1.

[0044] One end of the fifth capacitor C5 is connected to the first end of the secondary coil of the first transformer T1, the other end of the fifth capacitor C5 is connected to one end of the sixth capacitor C6, the other end of the sixth capacitor C6 is connected to the second end of the secondary coil of the first transformer T1, and the common point of the fifth capacitor C5 and the sixth capacitor C6 is grounded.

[0045] One end of the first resistor R1 is respectively connected to the positive output terminal and the positive compensation terminal of the brick-shaped power supply U1. The other end of the first resistor R1 is respectively connected to the neutral point of the brick-shaped power supply U1 and one end of the second resistor R2. The other end of the second resistor R2 is respectively connected to the negative output terminal and the negative compensation terminal of the brick-shaped power supply U1.

[0046] The positive output terminal of the brick-shaped power supply U1 is connected to the first end of the primary coil of the second transformer T2. The negative output terminal of the brick-shaped power supply U1 is connected to the second end of the primary coil of the second transformer T2.

[0047] The anode of the fourth diode D4 is connected to the second end of the primary coil of the second transformer T2. The cathode of the fourth diode D4 is connected to the first end of the primary coil of the second transformer T2.

[0048] One end of the seventh capacitor C7 is connected to the first end of the primary coil of the second transformer T2. The other end of the seventh capacitor C7 is connected to one end of the eighth capacitor C8. The other end of the eighth capacitor C8 is connected to the second end of the primary coil of the second transformer T2. The common point of the seventh capacitor C7 and the eighth capacitor C8 is grounded.

[0049] One end of the eleventh capacitor C11 is connected to the first end of the secondary coil of the second transformer T2. The other end of the eleventh capacitor C11 is connected to the second end of the secondary coil of the second transformer T2.

[0050] One end of the twelfth capacitor C12 is connected to the first end of the secondary coil of the second transformer T2. The other end of the twelfth capacitor C12 is connected to one end of the thirteenth capacitor C13. The other end of the thirteenth capacitor C13 is connected to the second end of the secondary coil of the second transformer T2. The common point of the twelfth capacitor C12 and the thirteenth capacitor C13 is grounded.

[0051] One end of the fourteenth capacitor C14 is connected to the first end of the secondary coil of the second transformer T2. The other end of the fourteenth capacitor C14 is connected to the second end of the secondary coil of the second transformer T2.

[0052] The first end of the secondary coil of the second transformer T2 is connected to the positive current output terminal. The second end of the secondary coil of the second transformer T2 is connected to the negative current output terminal.

[0053] In this embodiment, the voltage-stabilizing and filtering output circuit of the brick-shaped power supply includes a brick-shaped power supply U1, an input unit, and an output unit. The input unit consists of a first transformer T1, a first diode D1, a second diode D2, a third diode D3, a first capacitor C1, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a current positive input terminal, and a current negative input terminal, etc. The output unit consists of a second transformer T2, a fourth diode D4, a seventh capacitor C7, an eighth capacitor C8, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, a fourteenth capacitor C14, a first resistor R1, a second resistor R2, a current positive output terminal, and a current negative output terminal, etc.

[0054] The positive pole of the externally input current reaches the first diode D1 through the current positive input terminal, and the negative pole of the externally input current reaches the second diode D2 through the current negative input terminal; the third diode D3 is used to suppress the instantaneous spike voltage in the circuit; the first transformer T1 plays a role in protecting the brick-shaped power supply U1 and the human body; the fourth capacitor C4 is used to filter out ripple noise; the fifth capacitor C5 and the sixth capacitor C6 are used to filter out common-mode noise; after the above processing of the externally input current, high-quality current is obtained, and then the high-quality current is input into the brick-shaped power supply U1.

[0055] The output current of the brick-shaped power supply U1 first reaches the first resistor R1 and the second resistor R2 for voltage regulation. The fourth diode D4 is used to prevent abnormal front-stage power supply and post-stage spikes; the seventh capacitor C7 and the eighth capacitor C8 are used to filter out common-mode noise in the circuit; the second transformer T2 provides output protection to prevent abnormal leakage or short circuit; the eleventh capacitor C11 is used to compensate for insufficient front-stage filtering or the influence brought by interference midway; the twelfth capacitor C12 and the thirteenth capacitor C13 filter common-mode noise again, and the fourteenth capacitor C14 is used to filter out low-frequency noise.

[0056] In some embodiments, the first diode D1 and the second diode D2 are single-pass diodes, and the third diode D3 is a transient suppression diode; the first capacitor C1 is an electrolytic capacitor, the fourth capacitor C4 is a tantalum capacitor, and the fifth capacitor C5 and the sixth capacitor C6 are Y safety capacitors.

[0057] In some embodiments, the fourth diode D4 is a transient suppression diode; the seventh capacitor C7, the eighth capacitor C8, the twelfth capacitor C12, and the thirteenth capacitor C13 are Y safety capacitors, the ninth capacitor C9 is an electrolytic capacitor, and the fourteenth capacitor C14 is a tantalum capacitor.

[0058] In some embodiments, the voltage-stabilizing and filtering output circuit of the brick-shaped power supply further includes a fuse FU, and the fuse FU is connected in series between the current positive input terminal and the first diode D1. The fuse FU is used to protect the entire circuit when the externally input current is too large.

[0059] In some embodiments, the voltage stabilizing and filtering output circuit of the brick-shaped power supply further includes a second capacitor C2, a third capacitor C3, a ninth capacitor C9, and a tenth capacitor C10.

[0060] One end of the second capacitor C2 is connected to the first end of the primary coil of the first transformer T1, and the other end of the second capacitor C2 is connected to the second end of the primary coil of the first transformer T1.

[0061] One end of the third capacitor C3 is connected to the first end of the secondary coil of the first transformer T1, and the other end of the third capacitor C3 is connected to the second end of the secondary coil of the first transformer T1.

[0062] One end of the ninth capacitor C9 is connected to the first end of the primary coil of the second transformer T2, and the other end of the ninth capacitor C9 is connected to the second end of the primary coil of the second transformer T2.

[0063] One end of the tenth capacitor C10 is connected to the first end of the secondary coil of the second transformer T2, and the other end of the tenth capacitor C10 is connected to the second end of the secondary coil of the second transformer T2.

[0064] The second capacitor C2 and the third capacitor C3 are used to compensate for insufficient front-stage filtering; the ninth capacitor C9 is used for filtering, noise reduction, and voltage stabilization again; the tenth capacitor C10 is used to form a two-stage mutual backup filtering capacitor with the eleventh capacitor C11.

[0065] In some embodiments, the voltage stabilizing and filtering output circuit of the brick-shaped power supply further includes a light-emitting diode LED, and the light-emitting diode LED is connected in series between the positive current output terminal and the negative current output terminal. The light-emitting diode LED is used for emitting light indication when high-quality current is obtained.

[0066] In some embodiments, a group of common-mode inductors is provided on one side of the primary coil of the second transformer T2. The group of common-mode inductors includes two common-mode inductors L1. A common-mode inductor L1 is provided at each of the first end and the second end of the primary coil of the second transformer T2. The common-mode inductor L1 is used to filter out interference during common-mode. The common-mode inductor L1 is soldered on both sides of the primary coil of the second transformer when manufacturing the circuit board.

[0067] In some embodiments, the specifications of the second capacitor C2, the third capacitor C3, the ninth capacitor C9, and the tenth capacitor C10 are: the rated voltage is less than or equal to 100V, and the capacitance value is 4 - 10uF; or, the rated voltage is greater than 100V, and the capacitance value is 0.8 - 4uF.

[0068] The specifications of the fourth capacitor C4 and the fourteenth capacitor C14 are as follows: the rated current is less than 3A, and the capacitance value is 50 to 100 uF; or, the rated current is 3 to 10A, and the capacitance value is 100 to 500 uF; or, the rated current is 10 to 20A, and the capacitance value is 200 uF to 1000 uF; or, the rated current is 20 to 30A, and the capacitance value is 500 uF to 2500 uF; or, the rated current is 30 to 100A, and the capacitance value is 2000 uF to 5000 uF.

[0069] The specifications of the common-mode inductor L1 are as follows: the rated power is less than or equal to 1W, and the inductance value is 150 uH; or, the rated power is greater than 1W, and the inductance value is 600 to 1300 uH.

[0070] By using the components with the above specifications, the brick-shaped power supply U1 with an output power of 0 to 1000W can output a high-quality current with stable output voltage and small noise signal.

[0071] The above are only the preferred embodiments of the present invention. It should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described herein through the above teachings or the technology or knowledge in related fields. Any changes and modifications made by those skilled in the art without departing from the spirit and scope of the present invention shall fall within the protection scope of the appended claims of the present invention.

Claims

1. A voltage stabilizing and filtering output circuit for a brick-shaped power supply, characterized in that, It includes a brick-shaped power supply, a first transformer, a second transformer, a first diode, a second diode, a third diode, a fourth diode, a first capacitor, a fourth capacitor, a fifth capacitor, a sixth capacitor, a seventh capacitor, an eighth capacitor, an eleventh capacitor, a twelfth capacitor, a thirteenth capacitor, a fourteenth capacitor, a first resistor, a second resistor, a current positive input terminal, a current negative input terminal, a current positive output terminal, and a current negative output terminal; The first diode is connected in series between the current positive input terminal and the first end of the primary coil of the first transformer; The second diode is connected in series between the current negative input terminal and the first end of the primary coil of the first transformer; The first capacitor is connected in series between the first end and the second end of the primary coil of the first transformer; The third diode is connected in series between the first end and the second end of the primary coil of the first transformer; The first end of the secondary coil of the first transformer is connected to the positive input terminal of the brick-shaped power supply, and the second end of the secondary coil of the first transformer is connected to the negative input terminal of the brick-shaped power supply; The fourth capacitor is connected in series between the first end and the second end of the secondary coil of the first transformer; The fifth capacitor and the sixth capacitor are connected in series and then connected in series between the first end and the second end of the secondary coil of the first transformer, and the common point of the fifth capacitor and the sixth capacitor is grounded; The first resistor is connected in series between the positive output terminal of the brick-shaped power supply and the positive compensation terminal and the neutral point, and the second resistor is connected in series between the negative output terminal of the brick-shaped power supply and the negative compensation terminal and the neutral point; The positive output terminal of the brick-shaped power supply is connected to the first end of the primary coil of the second transformer, and the negative output terminal of the brick-shaped power supply is connected to the second end of the primary coil of the second transformer; The fourth diode is connected in series between the first end and the second end of the primary coil of the second transformer; The seventh capacitor and the eighth capacitor are connected in series and then connected in series between the first end and the second end of the primary coil of the second transformer, and the common point of the seventh capacitor and the eighth capacitor is grounded; The eleventh capacitor is connected in series between the first end and the second end of the secondary coil of the second transformer; The twelfth capacitor and the thirteenth capacitor are connected in series and then connected in series between the first end and the second end of the secondary coil of the second transformer, and the common point of the twelfth capacitor and the thirteenth capacitor is grounded; The fourteenth capacitor is connected in series between the first end and the second end of the secondary coil of the second transformer; The first end of the secondary coil of the second transformer is connected to the current positive output terminal, and the second end of the secondary coil of the second transformer is connected to the current negative output terminal.

2. The voltage stabilization and filtering output circuit of a brick-shaped power supply according to claim 1, characterized in that, The voltage stabilization and filtering output circuit of the brick-shaped power supply further includes a fuse, and the fuse is connected in series between the current positive input terminal and the first diode.

3. The voltage stabilizing and filtering output circuit of a brick-shaped power supply according to claim 1, wherein, The voltage stabilization and filtering output circuit of the brick-shaped power supply further includes a second capacitor, a third capacitor, a ninth capacitor, and a tenth capacitor; The second capacitor is connected in series between the first end and the second end of the primary coil of the first transformer; The third capacitor is connected in series between the first end and the second end of the secondary coil of the first transformer; The ninth capacitor is connected in series between the first end and the second end of the primary coil of the second transformer; The tenth capacitor is connected in series between the first end and the second end of the secondary coil of the second transformer.

4. The voltage stabilization and filtering output circuit of a brick-shaped power supply according to claim 1, characterized in that, The voltage-stabilizing and filtering output circuit of the brick-shaped power supply further includes a light-emitting diode, and the light-emitting diode is connected in series between the positive current output terminal and the negative current output terminal.

5. The voltage stabilization and filtering output circuit of a brick-shaped power supply according to claim 1, characterized in that, A group of common-mode inductors are provided on one side of the primary coil of the second transformer.

6. The voltage stabilization and filtering output circuit of a brick-type power supply according to claim 1, characterized in that, The first diode and the second diode are single-pass diodes, and the third diode and the fourth diode are transient suppression diodes.

7. The voltage stabilizing and filtering output circuit of a brick-shaped power supply according to claim 1, characterized in that, The first capacitor and the ninth capacitor are electrolytic capacitors, the fourth capacitor and the fourteenth capacitor are tantalum capacitors, and the fifth capacitor, the sixth capacitor, the seventh capacitor, the eighth capacitor, the twelfth capacitor and the thirteenth capacitor are Y safety capacitors.

8. The voltage stabilization and filtering output circuit of a brick-shaped power supply according to claim 3, characterized in that, The specifications of the second capacitor, the third capacitor, the ninth capacitor and the tenth capacitor are: the rated voltage is less than or equal to 100V, and the capacitance value is 4 to 10uF; or, the rated voltage is greater than 100V, and the capacitance value is 0.8 to 4uF; The specifications of the fourth capacitor and the fourteenth capacitor are: the rated current is less than 3A, and the capacitance value is 50 to 100uF; or, the rated current is 3 to 10A, and the capacitance value is 100 to 500uF; or, the rated current is 10 to 20A, and the capacitance value is 200uF to 1000uF; or, the rated current is 20 to 30A, and the capacitance value is 500uF to 2500uF; or, the rated current is 30 to 100A, and the capacitance value is 2000uF to 5000uF.

9. The voltage stabilizing and filtering output circuit of a brick-shaped power supply according to claim 5, characterized in that, The specifications of the common-mode inductor are: the rated power is less than or equal to 1W, and the inductance value is 150uH; or, the rated power is greater than 1W, and the inductance value is 600 to 1300uH.

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