CN109327170B - Cascade type multi-range voltage transformation equipment and control method - Google Patents
Cascade type multi-range voltage transformation equipment and control method Download PDFInfo
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- CN109327170B CN109327170B CN201810639043.2A CN201810639043A CN109327170B CN 109327170 B CN109327170 B CN 109327170B CN 201810639043 A CN201810639043 A CN 201810639043A CN 109327170 B CN109327170 B CN 109327170B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P13/00—Arrangements for controlling transformers, reactors or choke coils, for the purpose of obtaining a desired output
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/20—Measuring number of turns; Measuring transformation ratio or coupling factor of windings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/29—Terminals; Tapping arrangements for signal inductances
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Abstract
The invention provides cascade type multi-range voltage transformation equipment and a control method, wherein the voltage transformation equipment comprises a first test transformer, a second test transformer, a third test transformer and a control mechanism; each test transformer is provided with a low-voltage winding, a high-voltage winding, a test winding and a grounding end, wherein the high-voltage winding is provided with an excitation winding part; the control mechanism comprises three groups of first electronic switch assemblies, two groups of second electronic switch assemblies and two groups of third electronic switch assemblies and a control assembly; the transformer equipment improves the efficiency of switching the test transformer, avoids repeated dismantling and wiring, reduces the service life of the wiring terminal on the transformer, and simultaneously simplifies and facilitates the switching process. The good wiring control ensures the safe and reliable operation of the test transformer after switching.
Description
Technical Field
The invention belongs to the field of voltage transformation equipment, and particularly relates to cascade type multi-range voltage transformation equipment.
Background
In the current-stage low-voltage power equipment, in the test transformer with the voltage level lower than 500V, no better method is provided for enabling the test transformer to output more rated currents so as to meet the requirements of smooth running of different test equipment. In particular, in laboratories, different voltage requirements often occur, and a single transformer cannot be suitable for testing multiple voltage requirements due to limitations of rated voltage and the like. In a laboratory, the common method is realized by manually shorting transformers in a cascade of test transformers and connecting output terminals in different test transformers by test equipment, and the complicated processes of repeated dismantling, wiring and the like of the manual shorting lines greatly reduce the measurement efficiency; meanwhile, the service life of the wiring terminal on the transformer is greatly reduced. And the single test transformer outputs rated current and limited number of voltage classes, so that experiments of multiple voltage classes can not be better met.
Disclosure of Invention
The invention provides a transformation ratio measuring device of a test transformer, which aims to solve the problems of uncertainty and limitation of the number of output rated current and voltage levels when the test transformer is in cascade in a laboratory.
Another object of the present invention is to provide a control method for the transformation ratio measurement of a test transformer.
In order to achieve the above objective, the present invention provides a cascade multi-range transformer apparatus capable of converting an input voltage into an output voltage of various specifications, wherein the transformer apparatus comprises a first test transformer, a second test transformer, a third test transformer and a control mechanism.
Each test transformer has a low voltage winding, a high voltage winding, a test winding and a ground terminal, respectively, the high voltage winding having an excitation winding portion.
The first test transformer, the second test transformer and the third test transformer can respectively and independently convert input voltage into output voltage, and can be connected in series with the low-voltage winding and the grounding end of the second test transformer through the exciting winding of the high-voltage winding of the first test transformer and/or connected in series with the low-voltage winding and the grounding end of the third test transformer through the exciting winding of the high-voltage winding of the first test transformer.
The control mechanism comprises three groups of first electronic switch components which are respectively connected with the low-voltage winding of a test transformer, and each first electronic switch component is used for controlling the connection state of the low-voltage winding connected with the first electronic switch component and the input voltage.
The control mechanism comprises two groups of second electronic switch assemblies and two groups of third electronic switch assemblies, an exciting winding of a high-voltage winding of the first test transformer is connected to a low-voltage winding of the second test transformer in a serial connection mode through the second electronic switch assemblies and the third electronic switch assemblies, and a grounding end of the second test transformer is connected between the second electronic switch assemblies and the third electronic switch assemblies.
The exciting winding part of the high-voltage winding of the second test transformer is connected to the low-voltage winding of the third test transformer in a manner of connecting the other second electronic switch assembly and the other third electronic switch assembly in series, and the grounding end of the third test transformer is connected between the other second electronic switch assembly and the other third electronic switch assembly.
The control mechanism comprises a control component which is used for controlling the opening and closing states of the first electronic switch components, the second electronic switch components and the third electronic switch components.
The invention can be further perfected by the following technical measures:
as a further improvement, the transformation ratios of the first, second and third transformers are different.
As a further improvement, the control mechanism further comprises a fourth electronic switch and a fifth electronic switch. The connection terminal with higher voltage in the high-voltage winding is defined as a first pole terminal, and the connection terminal with lower voltage is defined as a second pole terminal.
The fourth electronic switch is used for controlling the connection state between the second pole terminal of the high-voltage winding of the second test transformer and the second pole terminal of the high-voltage winding of the third test transformer, and the fifth electronic switch is used for controlling the connection state between the first pole terminal and the second pole terminal of the high-voltage winding of the third test transformer.
As a further improvement, three groups of the first electronic switch assemblies are defined, namely, a first switch assembly connected with the low-voltage winding of the first test transformer, a second switch assembly connected with the low-voltage winding of the second test transformer and a third switch assembly connected with the low-voltage winding of the third test transformer.
The first switch component is provided with an electronic switch for controlling the connection state of the grounding wire and the grounding end of the first test transformer, and the second switch component is provided with an electronic switch for controlling the connection state of the grounding wire and the grounding end of the second test transformer; and the third switch assembly is provided with an electronic switch for controlling the connection state of the grounding wire and the grounding end of the third test transformer.
As a further improvement, two groups of second electronic switch assemblies are defined, namely a switch assembly six positioned between the first test transformer and the second test transformer and a switch assembly seven positioned between the second test transformer and the third test transformer; and defining two groups of third electronic switch assemblies, namely a switch assembly IV positioned between the first test transformer and the second test transformer and a switch assembly five positioned between the second test transformer and the third test transformer.
The control assembly is a PLC controller, and the PLC controller is provided with a first button for controlling the first switch assembly, a second button for controlling the second switch assembly, a third button for controlling the third switch assembly, a fourth button for controlling the fourth switch assembly, a fifth button for controlling the fifth switch assembly, a sixth button for controlling the sixth switch assembly, a seventh button for controlling the seventh switch assembly, an eighth button for controlling the fourth electronic switch and a ninth button for controlling the fifth electronic switch.
As a further improvement, the buttons of the PLC are buttons with a click function.
A control method of cascade type multi-range voltage transformation equipment is used for controlling the cascade type multi-range voltage transformation equipment.
Defining two groups of second electronic switch assemblies, namely a switch assembly six positioned between the first test transformer and the second test transformer and a switch assembly seven positioned between the second test transformer and the third test transformer; and defining two groups of third electronic switch assemblies, namely a switch assembly IV positioned between the first test transformer and the second test transformer and a switch assembly five positioned between the second test transformer and the third test transformer.
The control assembly has first to sixth control buttons.
The first control button is used for controlling the first switch component to be closed, controlling the second switch component to be opened, controlling the third switch component to be opened, controlling the fourth switch component to be opened, controlling the fifth switch component to be opened, controlling the sixth switch component to be closed, controlling the seventh switch component to be closed, controlling the fourth electronic switch to be closed and controlling the fifth electronic switch to be closed.
The second control button is used for controlling the first switch component to be closed, controlling the second switch component to be opened, controlling the third switch component to be opened, controlling the fourth switch component to be closed, controlling the fifth switch component to be opened, controlling the sixth switch component to be closed, controlling the seventh switch component to be closed, controlling the fourth electronic switch to be opened and controlling the fifth electronic switch to be closed.
The third control button is used for controlling the first switch component to be closed, controlling the second switch component to be opened, controlling the third switch component to be opened, controlling the fourth switch component to be closed, controlling the fifth switch component to be closed, controlling the sixth switch component to be closed, controlling the seventh switch component to be closed, controlling the fourth electronic switch to be opened and controlling the fifth electronic switch to be opened.
The fourth control button is used for switching on the first switch component, switching on the second switch component, switching on the third switch component, switching off the fourth switch component, switching on the fifth switch component, switching on the sixth switch component, switching on the seventh switch component, switching on the fourth electronic switch and switching on the fifth electronic switch.
The fifth control button is used for switching on the first switch component, switching on the second switch component, switching on the third switch component, switching off the fourth switch component, switching on the fifth switch component, switching on the sixth switch component, switching on the seventh switch component, switching on the fourth electronic switch and switching on the fifth electronic switch.
The sixth control button is used for switching on the first switch component, switching on the second switch component, switching off the third switch component, switching off the fourth switch component, switching off the fifth switch component, switching on the sixth switch component, switching off the seventh switch component, switching on the fourth electronic switch and switching on the fifth electronic switch.
As a further improvement, the switch further comprises a main switch button, wherein the main switch button is used for controlling the first switch component to be opened by one-key, the second switch component to be opened and the third switch component to be opened by one-key.
As a further improvement, the first to sixth control buttons are automatically sprung up when the main switch button is pressed; when any one of the first to sixth control buttons is pressed, the main switch button automatically pops up.
The invention respectively controls the voltage output of the low-voltage winding of each test transformer to be electrified through three groups of first electronic switch components. And the connection states among the three test transformers are respectively controlled through two groups of second electronic switch assemblies and two groups of third electronic switch assemblies. Therefore, the efficiency of the transformer is switched, repeated dismantling and wiring are avoided, the service life of the wiring terminal on the transformer is reduced, and meanwhile, the switching process is simplified and simplified. The good wiring control ensures the safe and reliable operation of the test transformer after switching. The 3 independent test transformers can only provide rated voltages with 3 measuring ranges and rated currents with 3 measuring ranges, and the number of the rated voltages output by the cascade test transformer provided by the invention is changed from 3 to 6, and the number of the rated currents is also changed from 3 to 6; the selectivity of the experimental voltage class is increased.
Drawings
FIG. 1 is a schematic diagram of a cascade multi-range transformer device according to an embodiment of the present invention;
FIG. 2 is a schematic view of a portion of the structure of FIG. 1;
fig. 3 is an enlarged partial schematic view of A1 of fig. 2.
Description of the reference numerals:
the PLC controller 10, the rectifying and step-down device 20, the first test transformer 30, the second test transformer 40, the third test transformer 50, the grounding wire 60, the low-voltage winding 71, the high-voltage winding 72, the exciting winding 73 and the grounding terminal 74.
Detailed Description
In order to describe the technical content, the constructional features, the achieved objects and effects of the present invention in detail, the following description is made in connection with the embodiments and the accompanying drawings.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Example 1:
a tandem multi-range voltage transformation apparatus capable of converting an input voltage into output voltages of various specifications, the voltage transformation apparatus comprising a first test transformer 30, a second test transformer 40, a third test transformer 50 and a control mechanism.
Each test transformer has a low voltage winding 71 with a positive input terminal and a negative input terminal thereon, a high voltage winding 72 with a first pole terminal and a second pole terminal thereon, a test winding (not shown) and a ground terminal 74, respectively. And the high voltage winding 72 has an excitation winding 73.
The first, second, and third test transformers 30, 40, and 50 can each individually convert an input voltage to an output voltage, and can convert the input voltage to the output voltage by connecting the exciting winding 73 of the high-voltage winding 72 of the first test transformer 30 in series with the low-voltage winding 71 and the ground terminal 74 of the second test transformer 40, and/or by connecting the exciting winding 73 of the high-voltage winding 72 of the second test transformer 40 in series with the low-voltage winding 71 and the ground terminal 74 of the third test transformer 50.
The control mechanism comprises three groups of first electronic switch components which are respectively connected with the low-voltage winding 71 of a test transformer, and each first electronic switch component is used for controlling the connection state of the low-voltage winding 71 connected with the first electronic switch components and the input voltage. I.e. the first electronic switching assembly is located between the power line and the low voltage winding 71 of the test transformer, and has the effect of controlling the power supply source of the test transformer.
The control mechanism comprises two groups of second electronic switch assemblies and two groups of third electronic switch assemblies, the exciting winding 73 of the high-voltage winding 72 of the first test transformer 30 is connected to the low-voltage winding 71 of the second test transformer 40 in a manner of connecting the second electronic switch assemblies and the third electronic switch assemblies in series, and the grounding end 74 of the second test transformer 40 is connected between the second electronic switch assemblies and the third electronic switch assemblies.
The field winding 73 part of the high voltage winding 72 of the second test transformer 40 is connected to the low voltage winding 71 of the third test transformer 50 in series with a further second electronic switching assembly and a further third electronic switching assembly, and the ground terminal 74 of the third test transformer 50 is connected between the further second electronic switching assembly and the further third electronic switching assembly.
The control mechanism comprises a control component which is used for controlling the opening and closing states of the first electronic switch components, the second electronic switch components and the third electronic switch components.
In the invention, the voltage output of the low-voltage winding of each test transformer is respectively controlled to be electrified through three groups of first electronic switch assemblies. And the connection states among the three test transformers are respectively controlled through two groups of second electronic switch assemblies and two groups of third electronic switch assemblies. Therefore, the efficiency of the transformer is switched, repeated dismantling and wiring are avoided, the service life of the wiring terminal on the transformer is reduced, and meanwhile, the switching process is simplified and simplified. The good wiring control ensures the safe and reliable operation of the test transformer after switching.
In this embodiment, the transformation ratios of the first, second and third transformers are different. In other embodiments, the transformation ratios of the first, second and third transformers may be the same in pairs or in three pairs.
The 3 independent test transformers can only provide rated voltages with 3 measuring ranges and rated currents with 3 measuring ranges, and the number of the rated voltages output by the cascade test transformer provided by the invention is changed from 3 to 6, and the number of the rated currents is also changed from 3 to 6; the selectivity of the experimental voltage class is increased.
Specifically, in the transformer apparatus of the present invention, the first test transformer 30 or the second test transformer 40 or the third test transformer 50 may be individually put into operation, the first test transformer 30 and the second test transformer 40 may be put into operation at the same time, or the second test transformer 40 and the third test transformer 50 may be put into operation at the same time, or the first test transformer 30 and the second test transformer 40 and the third transformer may be put into operation at the same time.
The transformer device can enable the transformer to output different voltage transformation ratios by controlling the first electronic switch assembly, the second electronic switch assembly and the third electronic switch assembly, and has rated voltage and rated current with a plurality of measuring ranges. Avoiding the dismantling and wiring of the test transformer in cascade. However, in the output connection to the equipment to be tested, it is also necessary to control the connection of the output terminals on the different test transformers by means of manual or automatic switches.
To solve this problem, in the present embodiment, the control mechanism further includes a fourth electronic switch and a fifth electronic switch.
The connection terminal with a higher voltage in the high-voltage winding 72 is defined as a first pole terminal, and the connection terminal with a lower voltage is defined as a second pole terminal.
The fourth electronic switch is used for controlling the connection state between the second pole terminal of the high voltage winding of the second test transformer 40 and the second pole terminal of the high voltage winding of the third test transformer 50, and the fifth electronic switch is used for controlling the connection state between the first pole terminal and the second pole terminal of the high voltage winding of the third test transformer 50. Since the fourth and fifth electronic switches may short-circuit the high voltage windings of the second and third test transformers 40 and 50, respectively. So that the present transformer apparatus can be fixedly connected to the first pole terminal of the high voltage winding of the third test transformer 50 in terms of output voltage, regardless of which transformers are put into operation, thereby reducing the wiring operation of the corresponding output terminals.
Three groups of the first electronic switch assemblies are defined, namely, a first switch assembly connected with the low-voltage winding of the first test transformer 30, a second switch assembly connected with the low-voltage winding of the second test transformer 40, and a third switch assembly connected with the low-voltage winding of the third test transformer 50.
The transformer apparatus further comprises a ground wire 60, wherein the first switch assembly has an electronic switch for controlling the connection state of the ground wire 60 and the ground terminal 74 of the first test transformer 30, and the second switch assembly has an electronic switch for controlling the connection state of the ground wire 60 and the ground terminal 74 of the second test transformer 40; the third switch assembly has an electronic switch that controls the connection of the ground wire 60 to the ground 74 of the third test transformer 50. Thus, when any of the test transformers is put into operation, the ground wire 60 is connected to the ground terminal 74 of the test transformer connected to the power supply, thereby protecting the equipment enclosure.
In the present embodiment, the control component is a PLC controller 10, and the PLC controller 10 has first to ninth buttons.
Defining two groups of second electronic switch assemblies, namely a switch assembly six between the first test transformer 30 and the second test transformer 40 and a switch assembly seven between the second test transformer 40 and the third test transformer 50; two sets of the third electronic switch assemblies are defined, namely a switch assembly four located between the first test transformer 30 and the second test transformer 40, and a switch assembly five located between the second test transformer 40 and the third test transformer 50.
The first button is used for controlling the first switch assembly, the second button is used for controlling the second switch assembly, the third button is used for controlling the third switch assembly, the fourth button is used for controlling the fourth switch assembly, the fifth button is used for controlling the fifth switch assembly, the sixth button is used for controlling the sixth switch assembly, the seventh button is used for controlling the seventh switch assembly, the eighth button is used for controlling the fourth electronic switch, and the ninth button is used for controlling the fifth electronic switch.
Referring to fig. 1 to 3, km1 to KM7 represent a first switch component to a seventh switch component, respectively; KM8 represents a fourth electronic switch, KM9 represents a fifth electronic switch; a1, A2, A3 represent first pole terminals of the first test transformer 30, the second test transformer 40, and the third test transformer 50, respectively. X1, X2, X3 represent the second terminals of the first test transformer 30, the second test transformer 40, and the third test transformer 50, respectively.
When only the first test transformer 30 is required to operate, the first to ninth buttons of the PLC controller 10 are used to control the first switch assembly to be closed, the second switch assembly to be opened, the third switch assembly to be opened, the fourth switch assembly to be closed, the fifth switch assembly to be opened, the sixth switch assembly to be closed, the seventh switch assembly to be closed, the fourth electronic switch to be opened, and the fifth electronic switch to be closed. The wires of the output voltage are connected to the second pole terminal of the high voltage winding of the first test transformer 30 and the first pole terminal of the high voltage winding of the third test transformer 50, respectively.
When only the second test transformer 40 is required to operate, the first to ninth buttons of the PLC controller 10 are used to control the first switch assembly to be opened and the second switch assembly to be closed, the third switch assembly to be opened, the fourth switch assembly to be closed, the fifth switch assembly to be opened, the sixth switch assembly to be opened, the seventh switch assembly to be closed, the fourth electronic switch to be opened and the fifth electronic switch to be closed. The wires of the output voltage are connected to the second pole terminal of the high voltage winding of the second test transformer 40 and the first pole terminal of the high voltage winding of the third test transformer 50, respectively.
When only the third test transformer 50 is required to operate, the first to ninth buttons of the PLC controller 10 are used to control the first switch assembly to be opened, the second switch assembly to be opened, the third switch assembly to be closed, the fourth switch assembly to be closed, the fifth switch assembly to be opened, the sixth switch assembly to be closed, the seventh switch assembly to be opened, the fourth electronic switch to be opened, and the fifth electronic switch to be opened. The wires of the output voltage are respectively connected with the second pole terminal of the high-voltage winding of the third test transformer 50 and the first pole terminal of the high-voltage winding of the third test transformer 50.
When the first test transformer 30 and the second test transformer 40 are required to operate simultaneously, the first switch assembly is controlled to be closed, the second switch assembly is controlled to be opened, the third switch assembly is controlled to be opened, the fourth switch assembly is controlled to be closed, the fifth switch assembly is controlled to be opened, the sixth switch assembly is controlled to be closed, the seventh switch assembly is controlled to be closed, the fourth electronic switch is controlled to be opened, and the fifth electronic switch is controlled to be closed. The wires of the output voltage are connected to the second pole terminal of the high voltage winding of the first test transformer 30 and the first pole terminal of the high voltage winding of the third test transformer 50, respectively.
When the second test transformer 40 and the third test transformer 50 are required to operate simultaneously, the first switch assembly is controlled to be opened, the second switch assembly is controlled to be closed, the third switch assembly is controlled to be opened, the fourth switch assembly is controlled to be closed, the fifth switch assembly is controlled to be closed, the sixth switch assembly is controlled to be opened, the seventh switch assembly is controlled to be closed, the fourth electronic switch is controlled to be opened, and the fifth electronic switch is controlled to be opened. The wires of the output voltage are connected to the second pole terminal of the high voltage winding of the second test transformer 40 and the first pole terminal of the high voltage winding of the third test transformer 50, respectively.
When the first, second and third test transformers 30, 40 and 50 are required to be simultaneously operated, the first to ninth buttons of the PLC controller 10 are used to control the first switch assembly to be closed, the second switch assembly to be opened, the third switch assembly to be opened, the fourth switch assembly to be closed, the fifth switch assembly to be closed, the sixth switch assembly to be closed, the seventh switch assembly to be closed, the fourth electronic switch to be opened and the fifth electronic switch to be opened. The wires of the output voltage are respectively connected with the second pole terminal of the high-voltage winding of the third test transformer 50 and the first pole terminal of the high-voltage winding of the third test transformer 50.
Further, in other embodiments, the buttons of the PLC controller 10 are all buttons with click functions.
In this embodiment, the rectifying and voltage-reducing device 20 is used to provide power, which can provide both the dc power required by the PLC controller 10 and the ac power required by the transformer.
Example 2
The device provided in the embodiment of the present invention has the same implementation principle and technical effects as those of embodiment 1, and for brevity, reference may be made to the corresponding contents of embodiment 1.
In this embodiment, the control unit is a controller, and the controller has first to sixth control buttons thereon.
The first control button corresponds to the first test transformer 30 only, and can be used for switching on and switching off the first switch assembly, switching on and switching off the second switch assembly, switching off and switching off the third switch assembly, switching on and switching off the fourth switch assembly, switching off and switching off the fifth switch assembly, switching off and switching off the seventh switch assembly, switching on and switching off the fourth electronic switch, and switching on the fifth electronic switch. The wires of the output voltage are connected to the second pole terminal of the high voltage winding of the first test transformer 30 and the first pole terminal of the high voltage winding of the third test transformer 50, respectively.
The second control button corresponds to the first test transformer 30 and the second test transformer 40 and is put into operation at the same time, and can switch on the first switch component and switch off the second switch component, switch off the third switch component, switch off the fourth switch component, switch off the fifth switch component, switch off the sixth switch component, switch off the seventh switch component, switch on the fourth electronic switch and switch off the fifth electronic switch. The wires of the output voltage are connected to the second pole terminal of the high voltage winding of the first test transformer 30 and the first pole terminal of the high voltage winding of the third test transformer 50, respectively.
And a third control button, corresponding to the first test transformer 30, the second test transformer 40 and the third test transformer 50, is put into operation simultaneously, and can switch on the first switch assembly, switch on the second switch assembly, switch off the third switch assembly, switch on the fourth switch assembly, switch on the fifth switch assembly, switch on the sixth switch assembly, switch on the seventh switch assembly, switch on the fourth electronic switch and switch on the fifth electronic switch. The wires of the output voltage are respectively connected with the second pole terminal of the high-voltage winding of the third test transformer 50 and the first pole terminal of the high-voltage winding of the third test transformer 50.
And a fourth control button, corresponding to the second test transformer 40, capable of one-time switching on the first switch assembly, one-time switching off the second switch assembly, one-time switching on the third switch assembly, one-time switching off the fourth switch assembly, one-time switching on the fifth switch assembly, one-time switching off the sixth switch assembly, one-time switching on the seventh switch assembly, one-time switching on the fourth switch, and one-time switching on the fifth switch. The wires of the output voltage are connected to the second pole terminal of the high voltage winding of the second test transformer 40 and the first pole terminal of the high voltage winding of the third test transformer 50, respectively.
The fifth control button, the second test transformer 40 and the third test transformer 50 are put into operation simultaneously, and the first switch assembly is turned on, the second switch assembly is turned off, the third switch assembly is turned on, the fourth switch assembly is turned on, the fifth switch assembly is turned on, the sixth switch assembly is turned on, the seventh switch assembly is turned on, the fourth electronic switch is turned on, and the fifth electronic switch is turned on. The wires of the output voltage are connected to the second pole terminal of the high voltage winding of the second test transformer 40 and the first pole terminal of the high voltage winding of the third test transformer 50, respectively.
And a sixth control button, corresponding to the third test transformer 50, capable of switching on the first switch assembly, switching off the second switch assembly, switching on the third switch assembly, switching off the fourth switch assembly, switching on the fifth switch assembly, switching on the seventh switch assembly, switching on the fourth electronic switch, and switching on the fifth electronic switch. The wires of the output voltage are respectively connected with the second pole terminal of the high-voltage winding of the third test transformer 50 and the first pole terminal of the high-voltage winding of the third test transformer 50.
The control method is simple in operation, and the transformer equipment can be controlled to obtain the optimal transformation ratio, namely the optimal rated voltage and rated current by only pressing a button once.
The controller is also provided with a main switch button, and the main switch button is used for controlling the first switch component to be opened and the second switch component to be opened by one-key control, and the third switch component to be opened. Thereby cutting off the power supply and enabling the transformer to be in a safe state.
Further, when the main switch button is pressed, the first to sixth control buttons are automatically sprung. When the transformation ratio needs to be switched, the main switch button is pressed, the power supply is cut off, and a user performs corresponding current switch or manual wiring on the output end.
When any one of the first to sixth control buttons is pressed, the main switch automatically bounces, and the switching of the transformation ratio is completed.
The foregoing description is only illustrative of the present invention and is not intended to limit the scope of the invention, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present invention.
Claims (9)
1. A cascade type multi-range voltage transformation device is characterized in that: the transformation equipment comprises a first test transformer, a second test transformer, a third test transformer and a control mechanism; each test transformer is provided with a low-voltage winding, a high-voltage winding, a test winding and a grounding end, wherein the high-voltage winding is provided with an excitation winding;
the first test transformer, the second test transformer and the third test transformer are provided with independent input and output ends, and an exciting winding of a high-voltage winding of the first test transformer is connected in series with a low-voltage winding and a grounding end of the second test transformer; the exciting winding of the high-voltage winding of the second test transformer is connected in series with the low-voltage winding and the grounding end of the third test transformer;
the control mechanism comprises three groups of first electronic switch components which are respectively connected with the low-voltage winding of a test transformer, and each first electronic switch component is used for controlling the connection state of the low-voltage winding connected with the first electronic switch component and the input voltage;
the control mechanism comprises two groups of second electronic switch assemblies and two groups of third electronic switch assemblies, an exciting winding of a high-voltage winding of the first test transformer is connected to a low-voltage winding of the second test transformer in a manner of connecting the second electronic switch assemblies and the third electronic switch assemblies in series, and a grounding end of the second test transformer is connected between the second electronic switch assemblies and the third electronic switch assemblies;
the exciting winding of the high-voltage winding of the second test transformer is connected to the low-voltage winding of the third test transformer in a mode of connecting the other second electronic switch assembly and the other third electronic switch assembly in series, and the grounding end of the third test transformer is connected between the other second electronic switch assembly and the other third electronic switch assembly;
the control mechanism comprises a control component which is used for controlling the opening and closing states of the first electronic switch component, the second electronic switch components and the third electronic switch components.
2. A cascaded multi-scale voltage transformation apparatus according to claim 1, characterized in that: the transformation ratios of the first test transformer, the second test transformer and the third test transformer are different.
3. A cascaded multi-scale voltage transformation apparatus according to claim 1, characterized in that: the control mechanism further comprises a fourth electronic switch and a fifth electronic switch,
defining a connecting terminal with higher voltage in the high-voltage winding as a first electrode terminal, and a connecting terminal with lower voltage as a second electrode terminal;
the fourth electronic switch is used for controlling the connection state between the second pole terminal of the high-voltage winding of the second test transformer and the second pole terminal of the high-voltage winding of the third test transformer, and the fifth electronic switch is used for controlling the connection state between the first pole terminal and the second pole terminal of the high-voltage winding of the third test transformer.
4. A cascaded multi-range voltage transformation apparatus according to claim 3, wherein three groups of said first electronic switch assemblies are defined, namely, a first switch assembly connected to the low voltage winding of said first test transformer, a second switch assembly connected to the low voltage winding of said second test transformer, and a third switch assembly connected to the low voltage winding of said third test transformer;
the first switch component is provided with an electronic switch for controlling the connection state of the grounding wire and the grounding end of the first test transformer, and the second switch component is provided with an electronic switch for controlling the connection state of the grounding wire and the grounding end of the second test transformer; and the third switch assembly is provided with an electronic switch for controlling the connection state of the grounding wire and the grounding end of the third test transformer.
5. The tandem multi-range voltage transformation apparatus of claim 4, wherein: defining two groups of second electronic switch assemblies, namely a switch assembly six positioned between the first test transformer and the second test transformer and a switch assembly seven positioned between the second test transformer and the third test transformer; defining two groups of third electronic switch assemblies, namely a switch assembly IV positioned between the first test transformer and the second test transformer and a switch assembly V positioned between the second test transformer and the third test transformer;
the control assembly is a PLC controller, and the PLC controller is provided with a first button for controlling the first switch assembly, a second button for controlling the second switch assembly, a third button for controlling the third switch assembly, a fourth button for controlling the fourth switch assembly, a fifth button for controlling the fifth switch assembly, a sixth button for controlling the sixth switch assembly, a seventh button for controlling the seventh switch assembly, an eighth button for controlling the fourth electronic switch and a ninth button for controlling the fifth electronic switch.
6. The cascaded multi-scale voltage transformation apparatus of claim 5, wherein: the buttons of the PLC are buttons with click functions.
7. A control method of cascade multi-range voltage transformation equipment is characterized by comprising the following steps: for controlling a tandem multi-range voltage transformation apparatus as claimed in claim 4;
defining two groups of second electronic switch assemblies, namely a switch assembly six positioned between the first test transformer and the second test transformer and a switch assembly seven positioned between the second test transformer and the third test transformer; defining two groups of third electronic switch assemblies, namely a switch assembly IV positioned between the first test transformer and the second test transformer and a switch assembly V positioned between the second test transformer and the third test transformer;
the control assembly has first to sixth control buttons;
the first control button is used for controlling the first switch component to be closed, controlling the second switch component to be opened, controlling the third switch component to be opened, controlling the fourth switch component to be opened, controlling the fifth switch component to be opened, controlling the sixth switch component to be closed, controlling the seventh switch component to be closed, controlling the fourth electronic switch to be closed and controlling the fifth electronic switch to be closed;
the second control button is used for controlling the first switch component to be closed, controlling the second switch component to be opened, controlling the third switch component to be opened, controlling the fourth switch component to be closed, controlling the fifth switch component to be opened, controlling the sixth switch component to be closed, controlling the seventh switch component to be closed, controlling the fourth electronic switch to be opened and controlling the fifth electronic switch to be closed;
the third control button is used for controlling the first switch component to be closed, controlling the second switch component to be opened, controlling the third switch component to be opened, controlling the fourth switch component to be closed, controlling the fifth switch component to be closed, controlling the sixth switch component to be closed, controlling the seventh switch component to be closed, controlling the fourth electronic switch to be opened and controlling the fifth electronic switch to be opened;
the fourth control button is used for switching on the first switch component, switching on the second switch component, switching on the third switch component, switching off the fourth switch component, switching on the fifth switch component, switching on the sixth switch component, switching on the seventh switch component, switching on the fourth electronic switch and switching on the fifth electronic switch;
the fifth control button is used for switching on the first switch component, switching on the second switch component, switching on the third switch component, switching off the fourth switch component, switching on the fifth switch component, switching on the sixth switch component, switching on the seventh switch component, switching on the fourth electronic switch and switching on the fifth electronic switch;
the sixth control button is used for switching on the first switch component, switching on the second switch component, switching off the third switch component, switching off the fourth switch component, switching off the fifth switch component, switching on the sixth switch component, switching off the seventh switch component, switching on the fourth electronic switch and switching on the fifth electronic switch.
8. The control method of the cascade multi-range voltage transformation device according to claim 7, wherein: the switch further comprises a main switch button, wherein the main switch button is used for controlling the first switch component to be opened by one-key control, the second switch component to be opened and the third switch component to be opened by one-key control.
9. The control method of a tandem type multi-range voltage transformation apparatus according to claim 8, wherein the first to sixth control buttons are automatically sprung up when the main switch button is pressed; when any one of the first to sixth control buttons is pressed, the main switch button automatically pops up.
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