A high power factor master control frequency conversion integrated board

Abstract

The utility model provides a kind of high power factor main control frequency conversion integrated board, it is specifically related to refrigeration equipment controller technical field.The integrated board includes main circuit and the first inductor TL1 of inhibiting electromagnetic interference, second inductor TL2, third capacitor CY1 and fourth capacitor CY2;The main circuit includes first current fuse FUSE1, first sub-sensitive resistance RV1, first thermistor NTC1, first resistance R1, second resistance R2, third resistance R3, first capacitor CX1, second capacitor CX2, rectifier bridge DB1 and film capacitor CF1;The TL1 includes first coil and second coil;The TL2 includes third coil and fourth coil;The DB1 includes first pin, second pin, third pin and fourth pin.The utility model circuit structure is simple, power factor is high, can effectively inhibit electromagnetic interference, both can satisfy the requirement of electromagnetic compatibility limit value in national standard GB17625.1-2022, and can reduce frequency conversion board cost.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration equipment controller technology, specifically to a high power factor main control frequency converter integrated board. Background Technology

[0002] With the continuous upgrading and iteration of refrigerators and freezers, frequency converter products are becoming increasingly common. According to the national standard GB17625.1-2022 Electromagnetic Compatibility Limits Part 1, harmonic current emission limits (input current per phase of the equipment ≤ 16A) are specified. Frequency converter products must meet this standard requirement. Typically, to meet the harmonic current emission limit requirements, manufacturers need to add reactors to the frequency converter board, which significantly increases the cost of the frequency converter board. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides a high power factor main control frequency converter integrated board, the specific technical solution of which is as follows:

[0004] A high power factor main control frequency converter integrated board includes a main circuit and a first inductor TL1, a second inductor TL2, a third capacitor CY1, and a fourth capacitor CY2 for suppressing electromagnetic interference. The main circuit includes a first current fuse FUSE1, a first sub-sensitive resistor RV1, a first thermistor NTC1, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor CX1, a second capacitor CX2, a rectifier bridge DB1, and a thin film capacitor CF1. TL1 includes a first coil and a second coil; TL2 includes a third coil and a fourth coil; and DB1 includes a first pin, a second pin, a third pin, and a fourth pin.

[0005] Preferably, the input terminal of FUSE1 is connected to the live wire ACL; the output terminal of FUSE1 is connected to the first terminal of RV1, the first terminal of CX1, and the input terminal of the first coil of TL1; the second terminal of RV1 is connected to the neutral wire ACN and the output terminal of NTC1; the second terminal of CX1 is connected to the input terminal of NTC1 and the input terminal of the second coil of TL1; the output terminal of the first coil of TL1 is connected to the first terminal of R1 and the input terminal of the third coil of TL2; the second terminal of R1 is connected to the first terminal of R2; and the second terminal of R2 is connected to the first terminal of R3. The following connections are made: the second terminal of R3 is connected to the output terminal of the second coil of TL1 and the input terminal of the fourth coil of TL2; the output terminal of the third coil of TL2 is connected to the first terminal of CY1, the first terminal of CX2, and the first pin of DB1; the second terminal of CY1 is connected to the first terminal of CY2; the output terminal of the fourth coil of TL2 is connected to the second terminal of CX2, the second terminal of CY2, and the second pin of DB1; the third pin of DB1 is connected to the input terminal of CF1; the output terminal of CF1 is connected to the 0 potential GND; and the fourth pin of DB1 is connected to GND.

[0006] Preferably, a grounding wire PA1 is also provided between CY1 and CY2.

[0007] Preferably, the first pin is an AC input pin; the second pin is an AC output pin; the third pin is a DC output pin; and the fourth pin is a DC input pin.

[0008] Preferably, the inductance of TL1 is 1.3 to 6 mH; and the inductance of TL2 is 15 to 33 mH.

[0009] Preferably, the inductance of TL1 is 3mH and the inductance of TL2 is 22mH.

[0010] Preferably, the capacity of CY1 or CY2 is 1 to 4.7 nF.

[0011] More preferably, the capacity of CY1 or CY2 is 2.2nF.

[0012] More preferably, the capacity of the CF1 is 3.5 to 8 μF.

[0013] More preferably, the capacity of CF1 is 6μF.

[0014] The beneficial effects of this utility model are:

[0015] This utility model has a simple circuit structure and a high power factor, which can effectively suppress electromagnetic interference. It can meet the electromagnetic compatibility limit requirements in the national standard GB17625.1-2022 and reduce the cost of the frequency converter board. Attached Figure Description

[0016] The accompanying drawings constituting this utility model are provided to further understand this application and do not constitute an undue limitation on this application.

[0017] Figure 1 This is the schematic diagram of the circuit structure of this utility model. Detailed Implementation

[0018] The specific implementation of the high power factor main control frequency converter integrated board provided by this utility model will be further described with reference to the accompanying drawings and embodiments.

[0019] A high power factor main control frequency converter integrated board includes a main circuit and a first inductor TL1, a second inductor TL2, a third capacitor CY1, and a fourth capacitor CY2 to suppress electromagnetic interference.

[0020] Specifically, the main circuit includes a first current fuse FUSE1, a first sub-sensitive resistor RV1, a first thermistor NTC1, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor CX1, a second capacitor CX2, a rectifier bridge DB1, and a thin-film capacitor CF1. TL1 and TL2 have the same structure, both including two coils. The two coils of TL1 are defined as the first coil and the second coil; the two coils of TL2 are defined as the third coil and the fourth coil.

[0021] Preferably, the DB1 includes a first pin, a second pin, a third pin, and a fourth pin. The first pin is an AC input pin; the second pin is an AC output pin; the third pin is a DC output pin; and the fourth pin is a DC input pin.

[0022] like Figure 1As shown, the input terminal of FUSE1 is connected to the live wire ACL; the output terminal of FUSE1 is connected to the first terminal of RV1, the first terminal of CX1, and the input terminal of the first coil of TL1; the second terminal of RV1 is connected to the neutral wire ACN and the output terminal of NTC1; the second terminal of CX1 is connected to the input terminal of NTC1 and the input terminal of the second coil of TL1; the output terminal of the first coil of TL1 is connected to the first terminal of R1 and the input terminal of the third coil of TL2; the second terminal of R1 is connected to the first terminal of R2; and the second terminal of R2 is connected to the first terminal of R3. The second end of R3 is connected to the output end of the second coil of TL1 and the input end of the fourth coil of TL2; the output end of the third coil of TL2 is connected to the first end of CY1, the first end of CX2, and the first pin of DB1; the second end of CY1 is connected to the first end of CY2; the output end of the fourth coil of TL2 is connected to the second end of CX2, the second end of CY2, and the second pin of DB1; the third pin of DB1 is connected to the input end of CF1; the output end of CF1 is connected to the 0 potential GND; and the fourth pin of DB1 is connected to the 0 potential GND.

[0023] Preferably, a grounding wire PA1 is also provided between CY1 and CY2.

[0024] It is worth noting that, in order to suppress electromagnetic interference to the greatest extent, the inductance of TL1 is 1.3 to 6 mH, and more preferably 3 mH; the inductance of TL2 is 15 to 33 mH, and more preferably 22 mH; and the capacitance of CY1 or CY2 is 1 to 4.7 nF, and more preferably 2.2 nF.

[0025] More preferably, the capacity of CF1 is 3.5 to 8 μF, and particularly preferably 6 μF.

[0026] Traditional frequency converter boards typically add reactors to meet harmonic current emission limits, but this inevitably leads to a significant increase in production costs. This invention, however, features a simple circuit structure, high power factor, and effective suppression of electromagnetic interference. It meets the electromagnetic compatibility limits specified in the national standard GB17625.1-2022 while simultaneously reducing the cost of the frequency converter board.

[0027] In this utility model, terms such as "upper," "lower," "bottom," and "top" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are merely used to facilitate the description of the structural relationships of the various components or elements of this utility model and do not specifically refer to any part or element of this utility model; they should not be construed as limiting this utility model. Terms such as "connected" and "linked" should be interpreted broadly, indicating a fixed connection, an integral connection, or a detachable connection; a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this utility model can be determined according to the specific circumstances, and they should not be construed as limiting this utility model.

[0028] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A high power factor main control frequency converter integrated board, characterized in that, It includes the main circuit and the first inductor TL1, the second inductor TL2, the third capacitor CY1, and the fourth capacitor CY2 for suppressing electromagnetic interference; The main circuit includes a first current fuse FUSE1, a first sub-sensitive resistor RV1, a first thermistor NTC1, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor CX1, a second capacitor CX2, a rectifier bridge DB1, and a thin-film capacitor CF1. TL1 includes a first coil and a second coil; TL2 includes a third coil and a fourth coil; The DB1 includes a first pin, a second pin, a third pin, and a fourth pin.

2. The high power factor main control frequency converter integrated board according to claim 1, characterized in that, The input terminal of FUSE1 is connected to the live wire ACL, and the output terminal of FUSE1 is connected to the first terminal of RV1, the first terminal of CX1, and the input terminal of the first coil of TL1; the second terminal of RV1 is connected to the neutral wire ACN and the output terminal of NTC1; the second terminal of CX1 is connected to the input terminal of NTC1 and the input terminal of the second coil of TL1. The output terminal of the first coil of TL1 is connected to the first terminal of R1 and the input terminal of the third coil of TL2; the second terminal of R1 is connected to the first terminal of R2; the second terminal of R2 is connected to the first terminal of R3; the second terminal of R3 is connected to the output terminal of the second coil of TL1 and the input terminal of the fourth coil of TL2. The output terminal of the third coil of TL2 is connected to the first terminal of CY1, the first terminal of CX2, and the first pin of DB1; the second terminal of CY1 is connected to the first terminal of CY2. The output terminal of the fourth coil of TL2 is connected to the second terminal of CX2, the second terminal of CY2, and the second pin of DB1. The third pin of DB1 is connected to the input terminal of CF1; the output terminal of CF1 is connected to the 0 potential GND. The fourth pin of DB1 is connected to GND.

3. The high power factor main control frequency converter integrated board according to claim 2, characterized in that, A grounding wire PA1 is also provided between CY1 and CY2.

4. The high power factor main control frequency converter integrated board according to claim 1, characterized in that, The first pin is an AC input pin; the second pin is an AC output pin; the third pin is a DC output pin; and the fourth pin is a DC input pin.

5. The high power factor main control frequency converter integrated board according to claim 1, characterized in that, The inductance of TL1 is 1.3 to 6 mH; the inductance of TL2 is 15 to 33 mH.

6. The high power factor main control frequency converter integrated board according to claim 5, characterized in that, The inductance of TL1 is 3mH; the inductance of TL2 is 22mH.

7. The high power factor main control frequency converter integrated board according to claim 1, characterized in that, The capacity of CY1 or CY2 is 1 to 4.7 nF.

8. The high power factor main control frequency converter integrated board according to claim 7, characterized in that, The capacity of CY1 or CY2 is 2.2nF.

9. The high power factor main control frequency converter integrated board according to claim 1, characterized in that, The capacity of the CF1 is 3.5–8 μF.

10. The high power factor main control frequency converter integrated board according to claim 9, characterized in that, The capacity of the CF1 is 6 μF.

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