CN214154353U - Off-grid inverter output N-wire grounding box controlled by dry contact - Google Patents
Off-grid inverter output N-wire grounding box controlled by dry contact Download PDFInfo
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- CN214154353U CN214154353U CN202023201856.5U CN202023201856U CN214154353U CN 214154353 U CN214154353 U CN 214154353U CN 202023201856 U CN202023201856 U CN 202023201856U CN 214154353 U CN214154353 U CN 214154353U
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Abstract
The utility model provides an export N line ground connection box of net dc-to-ac converter through dry contact control relates to the dc-to-ac converter field. The method comprises the following steps: the inverter comprises a box main body, wherein the input end of the box main body is electrically connected with the output end of the inverter, and the output end of the box main body is electrically connected with a load end; a main circuit is arranged in the box main body; the operation of workers is omitted, and convenience is improved, so that the purpose that the zero-earth voltage approaches zero when the inverter is used off the grid is achieved.
Description
Technical Field
The utility model relates to an inverter field particularly, relates to an export N line ground connection box of net dc-to-ac converter through dry contact control.
Background
The inverter is a device for converting direct current electric energy into alternating current, and consists of an inverter bridge, control logic and a filter circuit, and when the inverter works, the inverter also consumes a part of electric power, so that the input power of the inverter is greater than the output power of the inverter; the efficiency of the inverter is the ratio of the output power to the input power of the inverter, i.e., the inverter efficiency is the input power in terms of the output power ratio, and the inverter is widely used.
In the use, when the dc-to-ac converter is in the battery contravariant mode (be away from the net mode), need satisfy the demand of zero ground short circuit under the state of leaving the net, even the dc-to-ac converter is when leaving the net use, zero ground voltage approaches zero to satisfy the use of dc-to-ac converter, improve equipment's safety in utilization, but at present, the output of dc-to-ac converter is direct to be connected with the load end usually, and when the dc-to-ac converter is in the mode of leaving the net, often need staff manual operation, in order to reach the purpose that zero ground voltage approaches zero, it is inconvenient to use, it is convenient inadequately to operate, reduce its work efficiency.
Therefore, how to design an off-grid inverter output N-wire grounding box controlled by a dry contact to solve the problem is a urgent need to solve the problem at present.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a through dry contact control from net dc-to-ac converter output N line ground connection box to remove staff's operation from, improve the convenience, thereby reach the dc-to-ac converter when using from the net, zero ground voltage approaches to zero purpose.
The embodiment of the utility model is realized like this:
in a first aspect, an embodiment of the present application provides an off-grid inverter output N-line grounding box controlled by a dry junction, which includes a box main body, an input end of the box main body is electrically connected to an output end of an inverter, and an output end of the box main body is electrically connected to a load end; a main circuit is arranged in the box main body. When the box is used, the box main body is connected with a grounding wire, an N wire, an L wire and a main joint signal wire of a wire rod at the output end of the inverter and correspondingly connected to an output interface and a main joint interface of the inverter respectively; the device is used, on the basis of not changing the original off-grid inverter framework and the internal electrical property, the zero ground short circuit requirement in an off-grid state is completed only through a main contact signal output by the inverter, so that when the inverter is used in an off-grid mode, the zero ground voltage approaches zero, the requirements of different areas and different application occasions are met, the operation is simple and convenient, and the cost is lower.
In some embodiments of the present invention, the main circuit includes a relay circuit and an auxiliary power supply circuit.
Through the technical scheme, the zero-ground short circuit requirement of the inverter in the off-grid state is met through the relay circuit and the auxiliary power circuit.
In some embodiments of the present invention, the relay circuit includes relay PY1, terminal CN1, connector P1, connector P2, and connector P3; the connector P1 and the connector P2 are electrically connected with a third pin and a fourth pin of the relay PY1 respectively; the first pin and the second pin of the relay PY1 are electrically connected with the VCC end and the fourth pin of the wiring terminal CN1 respectively; the third pin of the connection terminal CN1 is connected to ground.
In some embodiments of the present invention, the auxiliary power circuit includes a rectifier bridge D1, a capacitor C1, a capacitor C2, a capacitor C3, a transistor Q1, and a resistor R1; a third pin of the rectifier bridge D1 is electrically connected with the end N, a fourth pin of the rectifier bridge D1 is electrically connected with one end of a capacitor C1, and the other end of the capacitor C1 is electrically connected with the end L; a first pin of the rectifier bridge D1 is sequentially connected in series with a resistor R1 and a triode Q1 and is electrically connected with a third pin of the triode Q1; the second pin of the rectifier bridge D1 is electrically connected with the first pin of the triode Q1 and is commonly connected to the ground; the first pin and the second pin of the rectifier bridge D1 are electrically connected with two ends of a capacitor C2 respectively; the second pin of the triode Q1 is electrically connected to the VCC terminal and one end of the capacitor C3, respectively, and the other end of the capacitor C3 is connected to ground.
In some embodiments of the present invention, the capacitor C2 and the capacitor C3 both use capacitors with positive and negative electrodes at two ends, the positive electrode of the capacitor C2 is electrically connected to the first pin of the rectifier bridge D1, and the negative electrode of the capacitor C2 is electrically connected to the second pin of the rectifier bridge D1; the positive electrode of the capacitor C3 is electrically connected to the second pin of the transistor Q1, and the negative electrode of the capacitor C3 is connected to ground.
In some embodiments of the present invention, the auxiliary power circuit further includes a resistor R3 electrically connected thereto, and both ends of the resistor R3 are electrically connected to the positive electrode of the capacitor C2 and the first pin of the transistor Q1, respectively.
In some embodiments of the present invention, the auxiliary power supply circuit further includes a resistor R2 electrically connected to the auxiliary power supply circuit, the resistor R2 is connected between the resistor R1 and the transistor Q1, and the two ends of the resistor R2 are electrically connected to one end of the resistor R1 and the third pin of the transistor Q1 respectively.
In some embodiments of the present invention, the auxiliary power circuit is further electrically connected to a zener diode ZD1, the one end of the zener diode ZD1 is electrically connected to the junction of the first pin of the transistor Q1 and the one end of the resistor R3, and the other end of the zener diode ZD1 is electrically connected to the second pin of the rectifier bridge D1 and commonly connected to the ground.
In some embodiments of the present invention, the box body is made of a non-conductive material.
The utility model discloses an in some embodiments, the insulating layer has all been laid to the inner wall and the outer wall of above-mentioned box main part, and the outer wall of box main part still is provided with waterproof layer and sealing layer.
Compared with the prior art, the embodiment of the utility model has following advantage or beneficial effect at least: when the box is used, the box main body is connected with a grounding wire, an N wire, an L wire and a main joint signal wire of a wire rod at the output end of the inverter and correspondingly connected to an output interface and a main joint interface of the inverter respectively; the grounding wire, the N wire and the L wire which are connected with the wire at the load end are respectively and correspondingly connected to the load;
under the default condition, the relay RY1 is in a disconnected state, when voltage is output at the output end of the inverter, the output voltage is reduced by the capacitor C1 and then is added to the fourth pin and the third pin of the rectifier bridge D1, at the moment, a rectified steamed bread wave is output between the first pin and the second pin of the D1, and after the rectified steamed bread wave is filtered by the capacitor C2, a stable direct-current voltage is output; then, after passing through the resistors R1 and R2, the voltage reaches the end of the capacitor C3 to output a stable direct current power supply VCC;
when the inverter is in the working state output of the off-grid mode of the battery, the inverter can give out a closed signal through a dry contact, the signal is sent to a relay driving circuit through wiring, the third pin and the fourth pin of the CN1 terminal are in short circuit, at the moment, the relay is driven to be enabled, the relay is closed, the terminal connector P1 and the connector P2 of the box main body are in short circuit together through the relay PY1, namely the output N line of the inverter is in short circuit together through the relay RY1 and the ground at the moment; because the mains supply is connected to the ground at the far end by default, when the inverter is switched to a mains supply mode, the inverter can send a signal for disconnecting the relay RY1 of the box main body through a dry contact while closing the mains supply relay, so that the N line at the output end of the inverter is disconnected with the ground;
by using the device, on the basis of not changing the original off-grid inverter architecture and the internal electrical property, the zero-ground short circuit requirement under the off-grid state is completed only through one dry contact signal output by the inverter, so that the zero-ground voltage approaches to zero when the inverter is used off-grid, the requirements of different areas and different application occasions are met, the operation is simple and convenient, and the cost is low.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is a diagram of a connection structure of a box main body in use according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a relay in an embodiment of the present invention;
FIG. 3 is a circuit diagram of an auxiliary power supply according to an embodiment of the present invention;
fig. 4 is a connection diagram of the inside of the box main body in the embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, the description is only for convenience of description of the present invention and simplification, but the indication or suggestion that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and therefore, the present invention should not be construed as being limited thereto. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, "a plurality" means at least 2.
In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Examples
Referring to fig. 1, 2, 3 and 4, the present embodiment provides an off-grid inverter output N-wire grounding box controlled by a dry contact, which includes a box main body, an input end of the box main body electrically connected to an output end of the inverter, and an output end of the box main body electrically connected to a load end; a main circuit is arranged in the box main body.
In some embodiments of the present invention, the main circuit includes a relay circuit and an auxiliary power supply circuit.
In some embodiments of the present invention, the relay circuit includes relay PY1, terminal CN1, connector P1, connector P2, and connector P3; the connector P1 and the connector P2 are respectively electrically connected with the third pin and the fourth pin of the relay PY 1; the first pin and the second pin of the relay PY1 are electrically connected with the VCC end and the fourth pin of the wiring terminal CN1 respectively; the third pin of terminal CN1 is connected to ground.
In some embodiments of the present invention, the auxiliary power circuit includes a rectifier bridge D1, a capacitor C1, a capacitor C2, a capacitor C3, a transistor Q1, and a resistor R1; a third pin of the rectifier bridge D1 is electrically connected with the N end, a fourth pin of the rectifier bridge D1 is electrically connected with one end of the capacitor C1, and the other end of the capacitor C1 is electrically connected with the L end; a first pin of the rectifier bridge D1 is sequentially connected in series with a resistor R1 and a triode Q1 and is electrically connected with a third pin of the triode Q1; a second pin of the rectifier bridge D1 is electrically connected with a first pin of the triode Q1 and is commonly connected to the ground; a first pin and a second pin of the rectifier bridge D1 are electrically connected with two ends of the capacitor C2 respectively; a second pin of the transistor Q1 is electrically connected to the VCC terminal and one end of the capacitor C3, respectively, and the other end of the capacitor C3 is connected to ground.
In some embodiments of the present invention, the capacitor C2 and the capacitor C3 both use capacitors with positive and negative electrodes at two ends, the positive electrode of the capacitor C2 is electrically connected to the first pin of the rectifier bridge D1, and the negative electrode of the capacitor C2 is electrically connected to the second pin of the rectifier bridge D1; the positive electrode of the capacitor C3 is electrically connected to the second pin of the transistor Q1, and the negative electrode of the capacitor C3 is connected to ground.
In some embodiments of the present invention, the auxiliary power circuit further includes a resistor R3 electrically connected thereto, and the two ends of the resistor R3 are electrically connected to the positive electrode of the capacitor C2 and the first pin of the transistor Q1, respectively.
In some embodiments of the present invention, the auxiliary power supply circuit further includes a resistor R2 electrically connected to the auxiliary power supply circuit, the resistor R2 is connected between the resistor R1 and the transistor Q1, and the two ends of the resistor R2 are electrically connected to one end of the resistor R1 and the third pin of the transistor Q1 respectively.
In some embodiments of the present invention, the auxiliary power circuit is further electrically connected to a zener diode ZD1, one end of the zener diode ZD1 is electrically connected to the first pin of the transistor Q1 and the junction of one end of the resistor R3, and the other end of the zener diode ZD1 is electrically connected to the second pin of the rectifier bridge D1 and commonly connected to the ground.
By combining the relay circuit and the auxiliary power supply circuit, the relay RY1 is in a disconnected state, when voltage is output at the output end of the inverter, the output voltage is reduced by the capacitor C1 and then is added to the fourth pin and the third pin of the rectifier bridge D1, a rectified steamed bread wave is output between the first pin and the second pin of the D1, and the rectified steamed bread wave is filtered by the capacitor C2 to output a stable direct-current voltage; then, the voltage reaches the end of the capacitor C3 after passing through the resistors R1 and R2, and a stable direct current power VCC is output.
When the inverter is in the working state output of the off-grid mode of the battery, the inverter can give out a closed signal through a dry contact, the signal is sent to a relay driving circuit through wiring, the third pin and the fourth pin of the CN1 terminal are in short circuit, at the moment, the relay is driven to be enabled, the relay is closed, the terminal connector P1 and the connector P2 of the box main body are in short circuit together through the relay PY1, namely the output N line of the inverter is in short circuit together through the relay RY1 and the ground at the moment; because the commercial power is connected to the ground at the far end by default, when the inverter is switched to a commercial power mode, the inverter can send a signal for disconnecting the box main body relay RY1 through a dry contact while closing the commercial power relay, so that the N line at the output end of the inverter is disconnected from the ground, and the purpose is achieved.
In some embodiments of the present invention, the box body is made of a non-conductive material.
The utility model discloses an in some embodiments, the insulating layer has all been laid to the inner wall and the outer wall of above-mentioned box main part, and the outer wall of box main part still is provided with waterproof layer and sealing layer.
The working principle of the off-grid inverter output N-wire grounding box controlled by the dry contact is as follows: when the box is used, the box main body is connected with a grounding wire, an N wire, an L wire and a main joint signal wire of a wire rod at the output end of the inverter and correspondingly connected to an output interface and a main joint interface of the inverter respectively; the grounding wire, the N wire and the L wire which are connected with the wire at the load end are respectively and correspondingly connected to the load;
under the default condition, the relay RY1 is in a disconnected state, when voltage is output at the output end of the inverter, the output voltage is reduced by the capacitor C1 and then is added to the fourth pin and the third pin of the rectifier bridge D1, at the moment, a rectified steamed bread wave is output between the first pin and the second pin of the D1, and after the rectified steamed bread wave is filtered by the capacitor C2, a stable direct-current voltage is output; then, the voltage reaches the end of the capacitor C3 after passing through the resistors R1 and R2, and a stable direct current power VCC is output.
When the inverter is in the working state output of the off-grid mode of the battery, the inverter can give out a closed signal through a dry contact, the signal is sent to a relay driving circuit through wiring, the third pin and the fourth pin of the CN1 terminal are in short circuit, at the moment, the relay is driven to be enabled, the relay is closed, the terminal connector P1 and the connector P2 of the box main body are in short circuit together through the relay PY1, namely the output N line of the inverter is in short circuit together through the relay RY1 and the ground at the moment; since the mains supply is grounded at the far end by default, when the inverter is switched to the mains supply mode, the inverter can close the mains supply relay and send a signal for opening the box main body relay RY1 through the dry contact, so that the N wire at the output end of the inverter is disconnected from the ground.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (3)
1. An off-grid inverter output N-wire grounding box controlled by a dry contact is characterized by comprising a box main body, wherein the input end of the box main body is electrically connected with the output end of an inverter, and the output end of the box main body is electrically connected with a load end; a main circuit is arranged in the box main body;
the main circuit comprises a relay circuit and an auxiliary power supply circuit;
the relay circuit comprises a relay PY1, a wiring terminal CN1, a connector P1, a connector P2 and a connector P3; the connector P1 and the connector P2 are electrically connected with a third pin and a fourth pin of the relay PY1 respectively; the first pin and the second pin of the relay PY1 are electrically connected with the VCC end and the fourth pin of the wiring terminal CN1 respectively; the third pin of the connection terminal CN1 is connected to ground;
the auxiliary power supply circuit comprises a rectifier bridge D1, a capacitor C1, a capacitor C2, a capacitor C3, a triode Q1 and a resistor R1; a third pin of the rectifier bridge D1 is electrically connected with the end N, a fourth pin of the rectifier bridge D1 is electrically connected with one end of a capacitor C1, and the other end of the capacitor C1 is electrically connected with the end L; a first pin of the rectifier bridge D1 is sequentially connected in series with a resistor R1 and a triode Q1 and is electrically connected with a third pin of the triode Q1; the second pin of the rectifier bridge D1 is electrically connected with the first pin of the triode Q1 and is commonly connected to the ground; the first pin and the second pin of the rectifier bridge D1 are electrically connected with two ends of a capacitor C2 respectively; a second pin of the triode Q1 is electrically connected to the VCC terminal and one end of the capacitor C3, respectively, and the other end of the capacitor C3 is connected to ground;
the capacitor C2 and the capacitor C3 both use capacitors with positive and negative electrodes at two ends, the positive electrode of the capacitor C2 is electrically connected with the first pin of the rectifier bridge D1, and the negative electrode of the capacitor C2 is electrically connected with the second pin of the rectifier bridge D1; the positive electrode of the capacitor C3 is electrically connected with the second pin of the triode Q1, and the negative electrode of the capacitor C3 is connected to the ground;
the auxiliary power supply circuit is also electrically connected with a resistor R3, and two ends of the resistor R3 are respectively and electrically connected with the positive electrode of the capacitor C2 and the first pin of the triode Q1;
the auxiliary power supply circuit is also electrically connected with a resistor R2, the resistor R2 is connected between the resistor R1 and the triode Q1, and two ends of the resistor R2 are respectively and electrically connected with one end of the resistor R1 and a third pin of the triode Q1;
the auxiliary power supply circuit is also electrically connected with a voltage stabilizing diode ZD1, one end of the voltage stabilizing diode ZD1 is electrically connected with the connection between the first pin of the triode Q1 and one end of the resistor R3, and the other end of the voltage stabilizing diode ZD1 is electrically connected with the second pin of the rectifier bridge D1 and is commonly connected to the ground.
2. The off-grid inverter output N-wire grounding box controlled by the dry contact as claimed in claim 1, wherein the box body is made of non-conductive material.
3. The off-grid inverter output N-wire grounding box controlled by the dry contact as claimed in claim 2, wherein the inner wall and the outer wall of the box main body are laid with insulating layers, and the outer wall of the box main body is further provided with a waterproof layer and a sealing layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023201856.5U CN214154353U (en) | 2020-12-25 | 2020-12-25 | Off-grid inverter output N-wire grounding box controlled by dry contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023201856.5U CN214154353U (en) | 2020-12-25 | 2020-12-25 | Off-grid inverter output N-wire grounding box controlled by dry contact |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214154353U true CN214154353U (en) | 2021-09-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023201856.5U Active CN214154353U (en) | 2020-12-25 | 2020-12-25 | Off-grid inverter output N-wire grounding box controlled by dry contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214154353U (en) |
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2020
- 2020-12-25 CN CN202023201856.5U patent/CN214154353U/en active Active
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