Anti-interference circuit of high-voltage soft starter

Abstract

The utility model provides an anti-interference circuit of a high-voltage soft starter. The anti-interference circuit comprises an inductor L1, an inductor L2, an inductor L3, an inductor L4, a resistor R1, a capacitor Cx1, a capacitor Cy1, a capacitor Cy2, a port P1 and a port P2. According to the utility model, a standard filter in the high-voltage soft starter is replaced by the multi-band filter plate with adjustable filter parameters, so that interference signals generated by an electric appliance module in the high-voltage soft starter are suppressed.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage soft starters, in particular to an anti-interference circuit of a high-voltage soft starter. Background Art

[0002] As a power electronic device for high-voltage motor start and stop control, the electromagnetic compatibility design is essential for the high-voltage soft starter. The ultimate goal of electromagnetic compatibility design is to effectively allow electrical and electronic components to coordinately complete their respective functions in an electromagnetic environment. Electromagnetic compatibility design is to avoid product failures caused by interference by improving the product's anti-electromagnetic interference ability and reducing external electromagnetic interference, thereby improving the reliability and safety of the product. Electromagnetic compatibility design generally needs to be designed from aspects such as suppressing interference sources and cutting off interference propagation paths. At present, the mainboard power supply, triggering work, and contactor switching in the high-voltage soft start will generate electromagnetic interference signals of varying degrees, which will affect the normal operation of some control modules with poor electromagnetic compatibility, such as some brands of touch screens and control panels. The current technology used is to connect finished filters in series in the mainboard power input and contactor coil circuit to suppress the intensity of interference signals.

[0003] Finished filters are expensive. Although some interference signals are within the filtering range of finished filters, they are not the signal segments with the best filtering effect, so the filtering effect is not that good. In addition, the filtering frequency range and / or the intensity of filtering out interference signals of cost filters are relatively fixed, and the adaptability range is narrow. Different interference signals require different filters, which will result in a large number of filter types required for the product and increase management costs. Utility Model Content

[0004] The utility model provides an anti-interference circuit of a high-voltage soft starter, which adopts a filter board with multi-band adjustable filtering parameters to replace a standard filter in the high-voltage soft starter, and suppresses interference signals generated by an electrical module inside the high-voltage soft starter.

[0005] The embodiment of this specification discloses an anti-interference circuit of a high-voltage soft starter, including an inductor L1, an inductor L2, an inductor L3, an inductor L4, a resistor R1, a capacitor Cx1, a capacitor Cy1, a capacitor Cy2, a port P1 and a port P2;

[0006] One end of the port P1 is connected to one end of the capacitor Cx1 and one end of the inductor L1, the other end of the port P1 is connected to the other end of the capacitor Cx1 and one end of the inductor L2, the other end of the inductor L1 is connected to one end of the resistor R1, one end of the capacitor Cy1 and one end of the inductor L3, the other end of the inductor L2 is connected to the other end of the resistor R1, one end of the capacitor Cy2 and one end of the inductor L4, the other end of the capacitor Cy1 is connected to the other end of the capacitor Cy2 and then grounded, the other end of the inductor L3 is connected to one end of the port P2, and the other end of the inductor L4 is connected to the other end of the port P2.

[0007] In some embodiments of the present specification, the port P1 is an input end, and the port P2 is an output end; or the port P1 is an output end, and the port P2 is an input end.

[0008] In some embodiments of this specification, the inductor L1 and the inductor L2 constitute a common mode inductor.

[0009] In some embodiments of the present specification, the inductor L3 and the inductor L4 are differential mode inductors.

[0010] In some embodiments of the present specification, the inductor L1, the inductor L2, the inductor L3, the inductor L4, the resistor R1, the capacitor Cx1, the capacitor Cy1 and the capacitor Cy2 constitute a filter, the capacitor Cx1 is the X capacitor of the filter, and the capacitor Cy1 and the capacitor Cy2 are the Y capacitors of the filter.

[0011] The embodiment of this specification also discloses an anti-interference circuit of a high-voltage soft starter, including a capacitor Cx2, a capacitor Cx3, a capacitor Cx4, a capacitor Cy3, a capacitor Cy4, a resistor R2, an inductor L5, an inductor L6, an inductor L7, an inductor L8, an inductor L9, an inductor L10, a port P3 and a port P4;

[0012] One end of the port P3 is connected to one end of the capacitor Cx2 and one end of the inductor L5, the other end of the port P3 is connected to the other end of the capacitor Cx2 and one end of the inductor L6, the other end of the inductor L5 is connected to one end of the capacitor Cx3, one end of the resistor R2, one end of the capacitor Cy3 and one end of the inductor L7, the other end of the inductor L6 is connected to the other end of the capacitor Cx3, the other end of the resistor R2, one end of the capacitor Cy4 and one end of the inductor L8, the other end of the capacitor Cy3 is connected to the other end of the capacitor Cy4 and then grounded, the other end of the inductor L7 is connected to one end of the inductor L9, the other end of the inductor L8 is connected to one end of the inductor L10, the other end of the inductor L9 is connected to one end of the capacitor Cx4 and one end of the port P4, and the other end of the inductor L10 is connected to the other end of the capacitor Cx4 and the other end of the port P4.

[0013] In some embodiments of the present specification, the port P3 is an input port, and the port P4 is an output port; or the port P3 is an output port, and the port P4 is an input port.

[0014] In some embodiments of the present specification, the inductor L5 and the inductor L6 constitute a common-mode inductor, the inductor L7 and the inductor L8 constitute a common-mode inductor; and the inductor L9 and the inductor L10 are differential-mode inductors.

[0015] In some embodiments of the present specification, the inductor L1, the inductor L2, the inductor L3, the inductor L4, the resistor R1, the capacitor Cx1, the capacitor Cy1 and the capacitor Cy2 constitute a filter, the capacitor Cx2, the capacitor Cx3 and the capacitor Cx4 are the X capacitors of the filter, and the capacitor Cy3 and the capacitor Cy4 are the Y capacitors of the filter.

[0016] In some embodiments of the present specification, the output end and / or the input end is connected to a filtering circuit, and the filtering circuit includes an input port V1, an output port V2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a capacitor C1, a capacitor C2, a capacitor C3 and an operational amplifier U1; the input port V1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to one end of the resistor R5, one end of the resistor R4 and the grounded capacitor C1, the other end of the resistor R4 is connected to one end of the capacitor C2 and the inverting end of the operational amplifier U1, the in-phase end of the operational amplifier U1 is grounded, the other end of the resistor R5 is connected to the other end of the capacitor C2, one end of the resistor R6 and the output end of the operational amplifier U1, and the other end of the resistor R6 is connected to the output port V2 and the grounded capacitor C3.

[0017] In summary, the utility model has at least the following beneficial effects:

[0018] By adjusting the values ​​of resistance, capacitance and inductance in the circuit, it is possible to apply different interference signal suppression processing. For high-voltage soft-start cabinets of the same specification, with the same components and the same layout, the interference signals are basically the same. The flexibility of this design is that the parameters of the aforementioned devices can be matched according to the interference signals generated by the product, so that the filtering effect of the circuit can be matched to the product to the best extent, thereby improving the reliability and stability of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 The figure is a schematic diagram of an anti-interference circuit of a high-voltage soft starter involved in some embodiments of the present utility model.

[0021] Figure 2 Schematic diagram of the anti-interference circuit of the high-voltage soft starter involved in other embodiments of the utility model.

[0022] Figure 3 It is a schematic diagram of the filter circuit involved in some embodiments of the utility model. DETAILED DESCRIPTION

[0023] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0024] In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0025] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present utility model, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0026] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific circumstances.

[0027] In the embodiments of the present utility model, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0028] The disclosure below provides many different embodiments or examples for realizing different structures of the embodiments of the present utility model. In order to simplify the disclosure of the embodiments of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present utility model. In addition, the embodiments of the present utility model can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed.

[0029] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0030] like Figure 1 As shown, the embodiment of this specification discloses an anti-interference circuit of a high-voltage soft starter, including an inductor L1, an inductor L2, an inductor L3, an inductor L4, a resistor R1, a capacitor Cx1, a capacitor Cy1, a capacitor Cy2, a port P1 and a port P2;

[0031] One end of the port P1 is connected to one end of the capacitor Cx1 and one end of the inductor L1, the other end of the port P1 is connected to the other end of the capacitor Cx1 and one end of the inductor L2, the other end of the inductor L1 is connected to one end of the resistor R1, one end of the capacitor Cy1 and one end of the inductor L3, the other end of the inductor L2 is connected to the other end of the resistor R1, one end of the capacitor Cy2 and one end of the inductor L4, the other end of the capacitor Cy1 is connected to the other end of the capacitor Cy2 and then grounded, the other end of the inductor L3 is connected to one end of the port P2, and the other end of the inductor L4 is connected to the other end of the port P2.

[0032] In some embodiments, the port P1 is an input port, and the port P2 is an output port; or the port P1 is an output port, and the port P2 is an input port.

[0033] In some embodiments, the inductor L1 and the inductor L2 constitute a common mode inductor.

[0034] In some embodiments, the inductor L3 and the inductor L4 are differential mode inductors.

[0035] In some embodiments, the inductor L1, the inductor L2, the inductor L3, the inductor L4, the resistor R1, the capacitor Cx1, the capacitor Cy1 and the capacitor Cy2 constitute a filter, the capacitor Cx1 is the X capacitor of the filter, and the capacitor Cy1 and the capacitor Cy2 are the Y capacitors of the filter.

[0036] like Figure 2 As shown, the embodiment of this specification also discloses an anti-interference circuit of a high-voltage soft starter, including a capacitor Cx2, a capacitor Cx3, a capacitor Cx4, a capacitor Cy3, a capacitor Cy4, a resistor R2, an inductor L5, an inductor L6, an inductor L7, an inductor L8, an inductor L9, an inductor L10, a port P3 and a port P4;

[0037] One end of the port P3 is connected to one end of the capacitor Cx2 and one end of the inductor L5, the other end of the port P3 is connected to the other end of the capacitor Cx2 and one end of the inductor L6, the other end of the inductor L5 is connected to one end of the capacitor Cx3, one end of the resistor R2, one end of the capacitor Cy3 and one end of the inductor L7, the other end of the inductor L6 is connected to the other end of the capacitor Cx3, the other end of the resistor R2, one end of the capacitor Cy4 and one end of the inductor L8, the other end of the capacitor Cy3 is connected to the other end of the capacitor Cy4 and then grounded, the other end of the inductor L7 is connected to one end of the inductor L9, the other end of the inductor L8 is connected to one end of the inductor L10, the other end of the inductor L9 is connected to one end of the capacitor Cx4 and one end of the port P4, and the other end of the inductor L10 is connected to the other end of the capacitor Cx4 and the other end of the port P4.

[0038] In some embodiments, the port P3 is an input terminal, and the port P4 is an output terminal; or the port P3 is an output terminal, and the port P4 is an input terminal.

[0039] In some embodiments, the inductor L5 and the inductor L6 constitute a common-mode inductor, and the inductor L7 and the inductor L8 constitute a common-mode inductor.

[0040] In some embodiments, the inductor L9 and the inductor L10 are differential mode inductors.

[0041] In some embodiments, the inductor L1, the inductor L2, the inductor L3, the inductor L4, the resistor R1, the capacitor Cx1, the capacitor Cy1 and the capacitor Cy2 constitute a filter, the capacitor Cx2, the capacitor Cx3 and the capacitor Cx4 are the X capacitors of the filter, and the capacitor Cy3 and the capacitor Cy4 are the Y capacitors of the filter.

[0042] In summary, because traditional filters have fixed parameters and are covered by metal shells, it is difficult and costly to adjust the parameters. Compared with traditional filters, the utility model can adjust the parameters of each component according to the interference signal of the interfered circuit, enhance the filtering adaptability range, and targeted filtering can achieve the best filtering effect. It is highly practical, low-cost, and flexible to use.

[0043] In some embodiments, the port P1 is an input end and the port P2 is an output end; or the port P1 is an output end and the port P2 is an input end; the port P3 is an input end and the port P4 is an output end; or the port P3 is an output end and the port P4 is an input end; based on this solution, the output end and / or the input end is connected to a filter circuit, such as Figure 3 As shown, the filtering circuit includes an input port V1, an output port V2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a capacitor C1, a capacitor C2, a capacitor C3 and an operational amplifier U1; the input port V1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to one end of the resistor R5, one end of the resistor R4 and the grounded capacitor C1, the other end of the resistor R4 is connected to one end of the capacitor C2 and the inverting end of the operational amplifier U1, the in-phase end of the operational amplifier U1 is grounded, the other end of the resistor R5 is connected to the other end of the capacitor C2, one end of the resistor R6 and the output end of the operational amplifier U1, and the other end of the resistor R6 is connected to the output port V2 and the grounded capacitor C3.

[0044] In this embodiment, by adding a filtering circuit at the output end and / or the input end, the filtering and anti-interference effects are further improved; the specific connection relationship between the input port V1 or the output port V2 and the output end and / or the input end (P1, P2, P3, P4) can be connected according to actual needs. If V1 needs to be connected to P1, V1 can be connected to one end or both ends of P1, and so on.

[0045] The above embodiments describe multiple specific implementations of the present invention, but those skilled in the art should understand that various changes or modifications can be made to these implementations without departing from the principles and essence of the present invention, but these changes and modifications are all within the scope of protection of the present invention.

Claims

1. An anti-interference circuit of a high-voltage soft starter, characterized in that: Includes inductor L1, inductor L2, inductor L3, inductor L4, resistor R1, capacitor Cx1, capacitor Cy1, capacitor Cy2, port P1 and port P2; One end of the port P1 is connected to one end of the capacitor Cx1 and one end of the inductor L1, the other end of the port P1 is connected to the other end of the capacitor Cx1 and one end of the inductor L2, the other end of the inductor L1 is connected to one end of the resistor R1, one end of the capacitor Cy1 and one end of the inductor L3, the other end of the inductor L2 is connected to the other end of the resistor R1, one end of the capacitor Cy2 and one end of the inductor L4, the other end of the capacitor Cy1 is connected to the other end of the capacitor Cy2 and then grounded, the other end of the inductor L3 is connected to one end of the port P2, and the other end of the inductor L4 is connected to the other end of the port P2.

2. The anti-interference circuit of the high-voltage soft starter according to claim 1 is characterized in that: The port P1 is an input end, and the port P2 is an output end; or the port P1 is an output end, and the port P2 is an input end.

3. The anti-interference circuit of the high-voltage soft starter according to claim 1 is characterized in that: The inductor L1 and the inductor L2 constitute a common mode inductor.

4. The anti-interference circuit of the high-voltage soft starter according to claim 1 is characterized in that: The inductor L3 and the inductor L4 are differential mode inductors.

5. The anti-interference circuit of the high-voltage soft starter according to claim 1, characterized in that: The inductor L1, the inductor L2, the inductor L3, the inductor L4, the resistor R1, the capacitor Cx1, the capacitor Cy1 and the capacitor Cy2 form a filter, the capacitor Cx1 is the X capacitor of the filter, and the capacitor Cy1 and the capacitor Cy2 are the Y capacitors of the filter. 6.An anti-interference circuit of a high-voltage soft starter, characterized in that: Including capacitor Cx2, capacitor Cx3, capacitor Cx4, capacitor Cy3, capacitor Cy4, resistor R2, inductor L5, inductor L6, inductor L7, inductor L8, inductor L9, inductor L10, port P3 and port P4; One end of the port P3 is connected to one end of the capacitor Cx2 and one end of the inductor L5, the other end of the port P3 is connected to the other end of the capacitor Cx2 and one end of the inductor L6, the other end of the inductor L5 is connected to one end of the capacitor Cx3, one end of the resistor R2, one end of the capacitor Cy3 and one end of the inductor L7, the other end of the inductor L6 is connected to the other end of the capacitor Cx3, the other end of the resistor R2, one end of the capacitor Cy4 and one end of the inductor L8, the other end of the capacitor Cy3 is connected to the other end of the capacitor Cy4 and then grounded, the other end of the inductor L7 is connected to one end of the inductor L9, the other end of the inductor L8 is connected to one end of the inductor L10, the other end of the inductor L9 is connected to one end of the capacitor Cx4 and one end of the port P4, and the other end of the inductor L10 is connected to the other end of the capacitor Cx4 and the other end of the port P4.

7. The anti-interference circuit of the high-voltage soft starter according to claim 6, characterized in that: The port P3 is an input port, and the port P4 is an output port; or the port P3 is an output port, and the port P4 is an input port.

8. The anti-interference circuit of the high-voltage soft starter according to claim 6, characterized in that: The inductor L5 and the inductor L6 constitute a common mode inductor, and the inductor L7 and the inductor L8 constitute a common mode inductor; the inductor L9 and the inductor L10 are differential mode inductors.

9. The anti-interference circuit of the high-voltage soft starter according to claim 6, characterized in that: The inductor L1, the inductor L2, the inductor L3, the inductor L4, the resistor R1, the capacitor Cx1, the capacitor Cy1 and the capacitor Cy2 form a filter, the capacitor Cx2, the capacitor Cx3 and the capacitor Cx4 are the X capacitors of the filter, and the capacitor Cy3 and the capacitor Cy4 are the Y capacitors of the filter.

10. The anti-interference circuit of the high-voltage soft starter according to claim 2 or 7, characterized in that: The output end and / or the input end is connected to a filter circuit, and the filter circuit includes an input port V1, an output port V2, a resistor R3, a resistor R4, a resistor R5, a resistor R6, a capacitor C1, a capacitor C2, a capacitor C3 and an operational amplifier U1; The input port V1 is connected to one end of the resistor R3, the other end of the resistor R3 is connected to one end of the resistor R5, one end of the resistor R4 and the grounded capacitor C1, the other end of the resistor R4 is connected to one end of the capacitor C2 and the inverting end of the operational amplifier U1, the non-inverting end of the operational amplifier U1 is grounded, the other end of the resistor R5 is connected to the other end of the capacitor C2, one end of the resistor R6 and the output end of the operational amplifier U1, and the other end of the resistor R6 is connected to the output port V2 and the grounded capacitor C3.

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