CN214098199U - Load variable voltage switching system - Google Patents
Load variable voltage switching system Download PDFInfo
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- CN214098199U CN214098199U CN202022997815.5U CN202022997815U CN214098199U CN 214098199 U CN214098199 U CN 214098199U CN 202022997815 U CN202022997815 U CN 202022997815U CN 214098199 U CN214098199 U CN 214098199U
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Abstract
The application discloses load vary voltage switched systems, through the disconnection and the closure of control zero type solid state relay, realize the switching of the power mode of load, because zero type solid state relay has the function of "zero break-make", can not produce big impulse current, zero type solid state relay is that no mechanical contact switches on and shuts off, its switching frequency can reach more than ten thousand times, switching speed only needs several milliseconds, can realize the fast switch-over and the real time control of load vary voltage accent merit. A load-swing switching system comprising: the power supply control circuit comprises a circuit breaker, at least two voltage transformation power regulation circuits, a load and a controller, wherein the load has at least two power modes, and each power mode corresponds to one voltage transformation power regulation circuit; each transformation power adjusting circuit is provided with a zero-crossing solid-state relay; the controller controls the zero-crossing solid-state relay to be switched on and off to realize the on and off of the corresponding voltage transformation power regulation circuit, so that the power mode of the load is switched.
Description
Technical Field
The utility model relates to a circuit field especially relates to a load vary voltage switched systems.
Background
In a load operation system with two-gear or multi-gear voltage transformation and power regulation functions, when a load operates at high power and needs to be switched from a high-voltage output mode to a low-voltage output mode, the load operating in the high-voltage mode is turned off, and then the load is switched to a low-voltage output end, and the process of switching high voltage to low voltage and low voltage to high voltage has a great defect that in the process of switching high current to low voltage or high current to start, because a system circuit is an inductive circuit with a transformer, a great impact current can be generated, the service life of equipment and components is influenced, and great electromagnetic interference is caused to surrounding components.
In order to solve the problem of the inrush current, as shown in fig. 1, a general operation flow is to cut off a control signal of the power regulator to reduce the output voltage of the power regulator to zero, then disconnect the contactor KM1, close the contactor KM2, and finally switch on the control signal of the power regulator, so that the operation is troublesome, and an automatic control program is also delayed in time to influence the fast switching and real-time control of the load. And the number of times of opening and closing the contactor is only more than one hundred thousand, and the service life of the contactor can not meet the requirement under the condition of frequent operation.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a load vary voltage switched systems, through the disconnection and the closure of control zero type solid state relay, realize the switching of the power mode of load, because zero type solid state relay has the function of "zero break-make", so can not produce big impulse current on the power circuit break-make is transferred to the vary voltage, zero type solid state relay is that no mechanical contact switches on and shuts off, its switching frequency can reach more than ten thousand times, switching speed only needs several milliseconds, can realize the fast switch-over and the real time control of load vary voltage power transfer.
The utility model discloses the first aspect provides a load vary voltage switched systems, include:
the power supply control system comprises a circuit breaker, at least two voltage transformation power regulation circuits, a load and a controller, wherein the load has at least two power modes, and each power mode corresponds to one voltage transformation power regulation circuit;
each transformation power adjusting circuit is provided with a zero-crossing solid-state relay;
the controller controls the zero-crossing solid-state relay to be switched on and off to realize the on and off of the corresponding voltage transformation power regulation circuit, so that the power mode of the load is switched.
Further, the at least two voltage transforming and power adjusting circuits comprise:
a power regulator and a transformer;
the input end of the power regulator is connected to a power grid through a circuit breaker;
the output end of the transformer is connected with the load, the transformer is provided with at least two input ends, and each input end corresponds to one power mode of the load;
each zero-crossing solid-state relay is connected with the input end of the power regulator and is respectively connected with one output end of the transformer.
Further, the load voltage transformation switching system further comprises:
and the direct current power supply supplies energy to the controller.
Further, the load voltage transformation switching system further comprises:
and the relay is arranged between the controller and the zero-crossing type solid-state relay.
Further, in the above-mentioned case,
the controller is a Programmable Logic Controller (PLC).
Further, the load voltage transformation switching system further comprises:
and the fuse is positioned between the circuit breaker and the power grid.
Therefore, the utility model discloses well load vary voltage switched systems includes circuit breaker, two at least vary voltage power regulation circuits, load and controller, and the load has two kind at least power modes, and each kind of power mode corresponds a vary voltage power regulation circuit, has a zero-crossing type solid state relay in each vary voltage power regulation circuit, and the controller is through the disconnection and the closure of control zero-crossing type solid state relay, realizes switching on and shutting off of the vary voltage power regulation circuit that corresponds to switch over the power mode of load. Compared with the prior art, the power mode switching of the load is realized by controlling the on-off of the zero-crossing type solid-state relay, and the zero-crossing type solid-state relay has the function of zero on-off, so that large impact current cannot be generated on the on-off of the variable-voltage power regulating circuit, the zero-crossing type solid-state relay is switched on and off without mechanical contact, the switching frequency can reach more than ten thousand times, the switching speed only needs several milliseconds, and the rapid switching and the real-time control of the variable-voltage power regulating of the load can be realized.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic circuit diagram of an embodiment of a conventional load voltage transformation power regulation system;
fig. 2 is a schematic circuit diagram of an embodiment of a load transformer switching system provided by the present invention;
fig. 3 is a schematic circuit diagram of another embodiment of the load transformer switching system according to the present invention.
Detailed Description
The utility model provides a load vary voltage switched systems, through control zero type solid state relay's disconnection and closure, realize the switching of the power mode of load, because zero type solid state relay has the function of "zero break-make", so can not produce big impulse current on the power circuit break-make is transferred to the vary voltage, zero type solid state relay is that no mechanical contact switches on and shuts off, its switching frequency can reach more than ten thousand times, switching speed only needs several milliseconds, can realize the fast switch-over and the real time control of load vary voltage power transfer.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. 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 all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, descriptions in the present application as to "first", "second", and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.
Referring to fig. 2, a load transformation switching system according to an embodiment of the present invention includes:
the power supply control circuit comprises a circuit breaker 201, at least two voltage transformation power regulation circuits 202, a load 203 and a controller 204, wherein the load 203 has at least two power modes, and each power mode corresponds to one voltage transformation power regulation circuit 202;
each voltage transformation power regulation circuit 202 is provided with a zero-crossing solid-state relay 2021;
the controller 204 controls the zero-crossing solid-state relay 2021 to open and close, so as to turn on and off the corresponding voltage transformation power regulation circuit 202, thereby switching the power mode of the load 203.
In the embodiment of the present invention, only two voltage-regulating power circuits 202 are shown in fig. 2, but in practical application, the number of the voltage-regulating power circuits may be two or more, and is not limited. Each variable voltage power regulating circuit 202 corresponds to a power mode of the load, and when switching is performed, the controller 204 controls the zero-crossing solid-state relay 2021 to be opened and closed, so as to realize the on and off of the corresponding variable voltage power regulating circuit 202, and realize the switching of the power mode of the load 203. The solid-state relay is actually a bidirectional thyristor. The solid-state relay can be divided into a random type and a zero-crossing type, the random type solid-state relay is switched on immediately when a control signal is input, and the zero-crossing type solid-state relay is not switched on immediately when the control signal is input and is switched on only when an input alternating-current power supply is subjected to zero crossing (sine wave zero crossing). The zero-crossing solid-state relay is generally used in situations where a smooth sine wave is required, or in situations where it is not time sensitive (e.g. electrical heating). The zero-crossing solid-state relay has the function of zero on-off, so that large impact current cannot be generated on the on-off of the variable-voltage power regulating circuit, the zero-crossing solid-state relay is switched on and off without mechanical contact, the switching frequency can reach more than ten thousand times, the switching speed only needs a few milliseconds, and the fast switching and the real-time control of the load variable-voltage power regulating can be realized.
Optionally, as shown in fig. 3, in some embodiments of the present invention, the at least two voltage transforming and power adjusting circuits 202 include:
a power regulator 2022 and a transformer 2023;
the input end of the power regulator 2022 is connected to the power grid through the circuit breaker 201;
the output terminal of the transformer 2023 is connected to the load 203, the transformer 203 has at least two input terminals (a1, B1, C1) and (a2, B2, C2), each corresponding to a power mode of the load;
each zero-crossing solid-state relay 2021 is connected to an input terminal of the power regulator 2022 and to an output terminal of the transformer 2023.
Optionally, as shown in fig. 3, in some embodiments of the present invention, the load voltage transformation switching system further includes:
a dc power supply 303, the dc power supply 303 powering the controller 204.
Optionally, as shown in fig. 3, in some embodiments of the present invention, the load voltage transformation switching system further includes:
a relay 302, the relay 302 being between the controller 204 and the zero-crossing type solid state relay 2021.
The relay is an automatic switch element with an isolation function, is widely applied to remote control, remote measurement, communication, automatic control, electromechanical integration and power electronic equipment, and is one of the most important control elements.
Alternatively, as shown in fig. 3, in some embodiments of the present invention,
the Controller 204 is a Programmable Logic Controller (PLC).
The PLC is an electronic system for digital arithmetic operation, and is designed to be applied in an industrial environment. It uses programmable memories for storing instructions for logical operations and sequence control, timing, counting, and arithmetic operations, and controls various types of machinery or manufacturing processes through digital or analog input (I) and output (O) interfaces.
Optionally, as shown in fig. 3, in some embodiments of the present invention, the load voltage transformation switching system further includes:
fuse 301, fuse 301 is between circuit breaker 201 and the grid.
A fuse (fuse) is an electric device that fuses a fuse body by heat generated by itself when a current exceeds a predetermined value, thereby breaking an electric circuit. The fuse melts the melt by the heat generated by the fuse after the current exceeds a specified value for a period of time, so as to cut off the circuit; a current protector is made by applying the principle. The fuse is widely applied to high and low voltage distribution systems, control systems and electric equipment, and is one of the most commonly applied protection devices as a short circuit and overcurrent protector.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A load-swing switching system, comprising:
the power supply control system comprises a circuit breaker, at least two voltage transformation power regulation circuits, a load and a controller, wherein the load has at least two power modes, and each power mode corresponds to one voltage transformation power regulation circuit;
each transformation power adjusting circuit is provided with a zero-crossing solid-state relay;
the controller controls the zero-crossing solid-state relay to be switched on and off to realize the on and off of the corresponding variable voltage power regulating circuit, so that the power mode of the load is switched.
2. The system of claim 1, wherein the at least two voltage swing and power regulation circuits comprise:
a power regulator and a transformer;
the input end of the power regulator is connected to a power grid through the circuit breaker;
the output end of the transformer is connected with the load, the transformer is provided with at least two input ends, and each input end corresponds to one power mode of the load;
each zero-crossing solid-state relay is connected with the input end of the power regulator and is respectively connected with one output end of the transformer.
3. The system of claim 2, wherein the load-swing switching system further comprises:
and the direct current power supply supplies energy to the controller.
4. The system of claim 3, wherein the load transformer switching system further comprises:
a relay between the controller and the zero-crossing type solid state relay.
5. The system according to any one of claims 1-4,
the controller is a Programmable Logic Controller (PLC).
6. The system of claim 2, wherein the load-swing switching system further comprises:
a fuse between the circuit breaker and the power grid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022997815.5U CN214098199U (en) | 2020-12-14 | 2020-12-14 | Load variable voltage switching system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022997815.5U CN214098199U (en) | 2020-12-14 | 2020-12-14 | Load variable voltage switching system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214098199U true CN214098199U (en) | 2021-08-31 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022997815.5U Active CN214098199U (en) | 2020-12-14 | 2020-12-14 | Load variable voltage switching system |
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| CN (1) | CN214098199U (en) |
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- 2020-12-14 CN CN202022997815.5U patent/CN214098199U/en active Active
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