Three-level AC / DC bidirectional controller

Abstract

The utility model discloses a three-level AC / DC bidirectional controller comprising a protective housing, the inner side of the protective housing is provided with a mounting plate, the surface of the mounting plate is provided with a three-level circuit board, one side of the three-level circuit board is connected with an input end, and the other side of the three-level circuit board is provided with a control end. An installation shell is installed on the side, away from the input end, of the three-level circuit board, and the positive level output line, the zero level output line and the negative level output line are combined and then connected with the circuit through the final output end. The utility model belongs to the technical field of three-level circuits, and achieves the technical effects that in the circuit adjustment process, the output state of the circuit can be monitored during final output by using the current detection chip, so that which state has a problem in the circuit adjustment process is determined, and elements in the circuit are convenient to replace in the later period.

Description

Technical Field

[0001] The utility model relates to the technical field of three-level circuits, in particular to a three-level AC / DC bidirectional controller. Background Art

[0002] Through a unique circuit design, a three-level inverter circuit can output three voltage levels: positive, zero, and negative. Compared to traditional two-level circuits, its output voltage waveform is closer to a sine wave, reducing harmonics, lowering electromagnetic interference, and improving efficiency. This topology has been widely used in high-voltage, high-power AC motor variable frequency speed regulation applications, such as photovoltaic inverters, wind turbine converters, and UPS.

[0003] When the three-level circuit is finally output, the output signals of different circuits are finally output at the same output port. It is not sensitive to the final output data when the circuit is switched, which can easily affect subsequent maintenance judgments. Utility Model Content

[0004] To this end, the present invention provides a three-level AC / DC bidirectional controller to solve the above-mentioned problems in the prior art.

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

[0006] According to a first aspect of the present invention, a three-level AC / DC bidirectional controller includes:

[0007] A protective shell is provided, wherein a mounting plate is installed on the inner side of the protective shell, and a three-level circuit board is installed on the surface of the mounting plate. One side of the three-level circuit board is connected to the input end, and the other side of the three-level circuit board is installed with a control end. A mounting shell is installed on the side of the three-level circuit board away from the input end. Three groups of current detection chips are installed on the inner side of the mounting shell for detecting the final output current of the circuit. The three groups of current detection chip monomers are respectively electrically connected to corresponding positive level output circuits, zero level output circuits and negative level output circuits. After the positive level output circuit, zero level output circuit and negative level output circuit are combined, they are connected to the circuit using the final output end.

[0008] Furthermore, a connector positioning mechanism is installed on the outer side of the positive level output circuit to enhance the connector positioning effect.

[0009] Furthermore, the joint positioning mechanism includes a limiting base, a positioning block is installed at the outer end of the limiting base for engaging the external mounting joint, and the protective shell is also provided with a groove structure at the corresponding position of the limiting base, and the opening of the groove structure is inclined.

[0010] Furthermore, a limiting block is installed on one side of the positioning block close to the protective shell, and a guide block corresponding to the limiting block is installed on the outer side of the protective shell, and the outer side of the guide block is arranged obliquely.

[0011] Furthermore, the limiting base is elastically connected to the protective shell via a spring.

[0012] The utility model has the following advantages:

[0013] During the circuit adjustment process, the utility model can use the current detection chip to monitor the output state of the circuit at the final output, so as to determine which state has a problem during the circuit adjustment process, which is convenient for replacing components in the circuit later. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front cross-sectional view of a three-level AC / DC bidirectional controller provided in some embodiments of the present invention.

[0015] Figure 2 For this utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0016] Figure 3 A side cross-sectional view of a three-level AC / DC bidirectional controller provided in some embodiments of the present invention.

[0017] In the figure: 1. Protective shell, 2. Mounting plate, 3. Three-level circuit board, 4. Input terminal, 5. Control terminal, 6. Mounting shell, 7. Current detection chip, 8. Connector positioning mechanism, 801. Limit base, 802. Positioning block, 803. Limit block, 804. Guide block, 9. Positive level output circuit, 10. Zero level output circuit, 11. Negative level output circuit, 12. Final output terminal. DETAILED DESCRIPTION

[0018] The following describes the implementation of the present invention through specific embodiments. Those skilled in the art can readily understand the other advantages and benefits of the present invention from the contents disclosed in this specification. Obviously, the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention. Example

[0019] like Figures 1 to 3As shown, a three-level AC / DC bidirectional controller in an embodiment of the first aspect of the present invention includes a protective housing 1, a mounting plate 2 is installed on the inner side of the protective housing 1, and a three-level circuit board 3 is installed on the surface of the mounting plate 2, one side of the three-level circuit board 3 is connected to the input terminal 4, and the other side of the three-level circuit board 3 is installed with a control terminal 5, a mounting housing 6 is installed on the side of the three-level circuit board 3 away from the input terminal 4, and three groups of current detection chips 7 are installed on the inner side of the mounting housing 6 for detecting the final output current of the circuit. The three groups of current detection chips 7 are electrically connected to corresponding positive level output circuits 9, zero level output circuits 10 and negative level output circuits 11 respectively. The positive level output circuit 9, zero level output circuit 10 and negative level output circuit 11 are combined and connected to the circuit via the final output terminal 12;

[0020] Specifically, the conventional three-level output state is adjusted in a manner that will not be elaborated on. During the adjustment process, the current detection chip 7 can be used to monitor the output state of the circuit at the final output, thereby determining which state has a problem during the circuit adjustment process, making it convenient to replace components in the circuit later. Example

[0021] like Figure 1 and Figure 2 As shown, a three-level AC / DC bidirectional controller includes all the contents of Example 1. In addition, a connector positioning mechanism 8 is further installed on the outside of the positive level output line 9 to enhance the connector positioning effect. The connector positioning mechanism 8 includes a limiting base 801, and a positioning block 802 is installed at the outer end of the limiting base 801 for engaging an external mounting connector. The protective housing 1 is further provided with a groove structure at a corresponding position of the limiting base 801, and the opening of the groove structure is inclined so that the limiting base 801 can be turned outward, facilitating the positioning block 802 to disengage from the external mounting connector.

[0022] A limit block 803 is further installed on the side of the positioning block 802 close to the protective housing 1, and a guide block 804 corresponding to the limit block 803 is also installed on the outside of the protective housing 1. The outer side of the guide block 804 is inclined, so that when the limit base 801 moves toward the protective housing 1, the limit block 803 is restricted by the inclined surface of the outer side of the guide block 804, causing the limit base 801 to tilt outward, thereby causing the positioning block 802 to break away from the engagement with the external mounting joint.

[0023] The limiting base 801 is elastically connected to the protective shell 1 via a spring, so that the limiting base 801 can be automatically reset.

Claims

1. A three-level AC / DC bidirectional controller, characterized in that: include: A protective shell (1) is provided, wherein a mounting plate (2) is mounted on the inner side of the protective shell (1), and a three-level circuit board (3) is mounted on the surface of the mounting plate (2), one side of the three-level circuit board (3) is connected to an input terminal (4), and a control terminal (5) is mounted on the other side of the three-level circuit board (3), a mounting shell (6) is mounted on the side of the three-level circuit board (3) away from the input terminal (4), and three groups of current detection chips (7) are mounted on the inner side of the mounting shell (6) for detecting the magnitude of the final output current of the circuit, and the three groups of current detection chips (7) are electrically connected to corresponding positive level output circuits (9), zero level output circuits (10) and negative level output circuits (11) respectively, and the positive level output circuits (9), zero level output circuits (10) and negative level output circuits (11) are combined and connected to the circuit using the final output terminal (12).

2. A three-level AC / DC bidirectional controller according to claim 1, characterized in that: A connector positioning mechanism (8) is also installed on the outside of the positive level output circuit (9) to enhance the connector positioning effect.

3. The three-level AC / DC bidirectional controller according to claim 2, characterized in that: The joint positioning mechanism (8) comprises a limiting base (801), a positioning block (802) is mounted on the outer end of the limiting base (801) for engaging an external mounting joint, and the protective housing (1) is further provided with a groove-shaped structure at a corresponding position of the limiting base (801), and the opening of the groove-shaped structure is arranged at an angle.

4. The three-level AC / DC bidirectional controller according to claim 3, characterized in that: A limiting block (803) is further installed on the side of the positioning block (802) close to the protective shell (1), and a guide block (804) corresponding to the limiting block (803) is further installed on the outer side of the protective shell (1), and the outer side of the guide block (804) is arranged obliquely.

5. The three-level AC / DC bidirectional controller according to claim 4, characterized in that: The limiting base (801) is elastically connected to the protective housing (1) via a spring.

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