CN117335671A - Voltage stabilizing circuit and device - Google Patents

Voltage stabilizing circuit and device Download PDF

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Publication number
CN117335671A
CN117335671A CN202311395150.2A CN202311395150A CN117335671A CN 117335671 A CN117335671 A CN 117335671A CN 202311395150 A CN202311395150 A CN 202311395150A CN 117335671 A CN117335671 A CN 117335671A
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CN
China
Prior art keywords
voltage
transformer
supply voltage
power supply
compensation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311395150.2A
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Chinese (zh)
Inventor
李建设
李晓林
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Puerjieneng Science And Technology Development Co ltd Beijing
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Puerjieneng Science And Technology Development Co ltd Beijing
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Priority to CN202311395150.2A priority Critical patent/CN117335671A/en
Publication of CN117335671A publication Critical patent/CN117335671A/en
Pending legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/10—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers
    • H02M5/12—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using transformers for conversion of voltage or current amplitude only
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/14—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices
    • G05F1/16—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices combined with discharge tubes or semiconductor devices
    • G05F1/20—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using tap transformers or tap changing inductors as final control devices combined with discharge tubes or semiconductor devices semiconductor devices only
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/10—Regulating voltage or current
    • G05F1/12—Regulating voltage or current wherein the variable actually regulated by the final control device is ac
    • G05F1/40—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices
    • G05F1/44—Regulating voltage or current wherein the variable actually regulated by the final control device is ac using discharge tubes or semiconductor devices as final control devices semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/12—Circuit arrangements for ac mains or ac distribution networks for adjusting voltage in ac networks by changing a characteristic of the network load
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
    • H02M5/02—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc
    • H02M5/04—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters
    • H02M5/22—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M5/25—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
    • H02M5/257—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
    • H02M5/2573—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases without intermediate conversion into dc by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only with control circuit
    • 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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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

The invention relates to the technical field of transformers, and discloses a voltage stabilizing circuit and a device, wherein the voltage stabilizing circuit comprises: the compensation module is respectively connected with the primary end of the transformer, the load wire and the zero line, and the secondary end of the transformer is respectively connected with the live wire and the load wire. When the power supply voltage of the compensation module on the load line is not equal to the preset standard voltage, the load line is connected to the primary end of the transformer, so that the power supply voltage is output to the primary end of the transformer; when the primary end of the transformer receives the power supply voltage, the transformer induces a compensation voltage on the secondary end of the transformer so as to compensate the power supply voltage through the compensation voltage. The voltage stabilizing circuit disclosed by the invention has the advantages that the problem that the existing voltage stabilizing circuit can not output accurate voltage due to the fact that the carbon brush holder moves on the transformer and is worn in the using process is avoided, and the carbon brush holder cannot be in good contact with the transformer.

Description

Voltage stabilizing circuit and device
Technical Field
The present invention relates to the field of transformers, and in particular, to a voltage stabilizing circuit and device.
Background
In an actual mains supply system, the problem of mains supply fluctuation often occurs due to overlong power supply lines or unstable load of the power supply lines. In order to reduce the fluctuation of the commercial power, a voltage stabilizing circuit is arranged between a commercial power grid and a load, and the fluctuation of the commercial power is reduced through the voltage stabilizing circuit so as to output accurate voltage.
At present, the existing voltage stabilizing circuit moves on a transformer by means of a carbon brush frame, and adjusts the power supply voltage by changing the number of turns of input and output of the transformer so as to realize voltage stabilization, reduce the fluctuation of mains supply and output accurate voltage. However, as the carbon brush holder and the transformer are mechanically driven, the carbon brush holder can be worn in the use process along with the longer use time, so that the carbon brush holder cannot be in good contact with the transformer, accurate voltage cannot be output, and the voltage regulation precision is reduced.
The foregoing is provided merely for the purpose of facilitating understanding of the technical solutions of the present invention and is not intended to represent an admission that the foregoing is prior art.
Disclosure of Invention
The invention mainly aims to provide a voltage stabilizing circuit and a device, and aims to solve the technical problems that in the voltage stabilizing circuit in the prior art, as mechanical transmission is adopted between a carbon brush holder and a transformer, the carbon brush holder can wear in the use process along with the longer use time, so that the carbon brush holder cannot be in good contact with the transformer, the voltage regulation precision is reduced, and accurate voltage cannot be output.
In order to achieve the above object, the present invention provides a voltage stabilizing circuit including: a compensation module and a transformer;
The compensation module is respectively connected with the primary end of the transformer, the load wire and the zero wire, and the secondary end of the transformer is respectively connected with the live wire and the load wire;
the compensation module is used for connecting the load line to the primary end of the transformer when the power supply voltage on the load line is not equal to the preset standard voltage, so that the power supply voltage is output to the primary end of the transformer;
and the transformer is used for inducing a compensation voltage on the auxiliary end of the transformer when the primary end of the transformer receives the power supply voltage so as to compensate the power supply voltage through the compensation voltage.
Optionally, the compensation module includes: the driving unit, the first switching tube and the compensating unit;
the driving unit is connected with the control end of the first switching tube, the input end of the first switching tube is connected with the load line, the output end of the first switching tube is connected with the compensation unit, and the compensation unit is respectively connected with the original end of the transformer and the zero line;
the driving unit is used for collecting the power supply voltage on the load line and comparing the power supply voltage with the preset standard voltage;
And the driving unit is also used for controlling the first switching tube to be closed when the power supply voltage is not equal to the preset standard voltage, and connecting the load line into the primary end of the transformer so as to enable the power supply voltage to be output to the primary end of the transformer.
Optionally, the compensation unit includes: the first silicon controlled rectifier, the second silicon controlled rectifier, the third silicon controlled rectifier and the fourth silicon controlled rectifier;
the first end of the first controllable silicon is connected with the first end of the original end of the transformer, the second end of the first controllable silicon is connected with the output end of the first switch tube, and the control end of the first controllable silicon is connected with the driving unit;
the first end of the second silicon controlled rectifier is connected with the second end of the original end of the transformer, the second end of the second silicon controlled rectifier is connected with a zero line, and the control end of the second silicon controlled rectifier is connected with the driving unit;
the first end of the third controllable silicon is connected with the second end of the original end of the transformer, the second end of the third controllable silicon is connected with the output end of the first switch tube, and the control end of the third controllable silicon is connected with the driving unit;
the first end of the fourth silicon controlled rectifier is connected with the first end of the original end of the transformer, the second end of the fourth silicon controlled rectifier is connected with the zero line, and the control end of the fourth silicon controlled rectifier is connected with the driving unit.
Optionally, the driving unit is further configured to drive the first silicon controlled rectifier to be closed when the power supply voltage is greater than the preset standard voltage, drive the second silicon controlled rectifier to be closed, and connect the zero line to the second end of the primary end of the transformer, so that a step-down compensation loop between the primary end of the transformer and the secondary end of the transformer is conducted;
the primary end of the transformer is used for receiving the power supply voltage through the step-down compensation loop and inducing a reverse compensation voltage with the direction opposite to that of the power supply voltage on the secondary end of the transformer so as to reduce the power supply voltage through the reverse compensation voltage.
Optionally, the driving unit is further configured to drive the third thyristor to be closed when the power supply voltage is less than the preset standard voltage, and to connect the load line to the second end of the primary end of the transformer and drive the fourth thyristor to be closed, and to connect the zero line to the first end of the primary end of the transformer, so that a boost compensation loop between the primary end of the transformer and the secondary end of the transformer is conducted;
the primary end of the transformer is used for receiving the power supply voltage through the boost compensation loop, and the same-direction compensation voltage with the power supply voltage is induced on the secondary end of the transformer, so that the power supply voltage is boosted through the same-direction compensation voltage.
Optionally, the voltage stabilizing circuit further includes: a second switching tube;
the input end of the second switching tube is respectively connected with the second end of the second controllable silicon and the second end of the fourth controllable silicon, and the output end of the second switching tube is connected with the zero line;
the driving unit is further configured to control the second switching tube to be closed when a voltage difference between the power supply voltage and the preset standard voltage exceeds a preset stable range, and access the zero line to the second silicon controlled rectifier and/or the fourth silicon controlled rectifier, so that the transformer compensates the power supply voltage;
and the driving unit is also used for controlling the second switching tube to be disconnected when the voltage difference between the compensated power supply voltage and the preset standard voltage is in the preset stable range so as to stop the transformer from compensating the power supply voltage.
Optionally, the voltage stabilizing circuit further includes: a switching module and an autotransformer;
the switching module is respectively connected with each tap end of the autotransformer, the second end of the first silicon controlled rectifier and the second end of the third silicon controlled rectifier, the first end of the autotransformer is connected with the output end of the first switching tube, and the second end of the autotransformer is connected with the zero line;
Each tap end of the autotransformer is a tap end between a first end of the autotransformer and a second end of the autotransformer, and the tap ends of the autotransformer are graded in the order from the first end of the autotransformer to the second end of the autotransformer;
the driving unit is further configured to control the switching module to connect an initial tap terminal of the autotransformer to the first silicon controlled rectifier and/or the third silicon controlled rectifier when the supply voltage is not equal to the preset standard voltage, so that the autotransformer induces an adjustment voltage based on the initial tap terminal;
the autotransformer is used for outputting the regulating voltage to the first controllable silicon and/or the third controllable silicon, so that the transformer compensates the power supply voltage based on the regulating voltage.
Optionally, the driving unit is further configured to control the switching module to switch the initial tap end to a tap end of a previous stage of the initial tap end when the voltage difference between the compensated power supply voltage and the preset standard voltage is not in the preset stable range, until the voltage difference between the compensated power supply voltage and the preset standard voltage is in the preset stable range.
Optionally, the switching module includes: a plurality of gating thyristors corresponding to tap ends of the autotransformer;
the first end of each gating silicon controlled rectifier is respectively connected with each tap end of the autotransformer, and the second end of each gating silicon controlled rectifier is respectively connected with the second end of the first silicon controlled rectifier and the second end of the third silicon controlled rectifier; and the control end of each gating silicon controlled rectifier is connected with the driving unit.
In addition, in order to achieve the above object, the present invention also proposes a voltage stabilizing device including the voltage stabilizing circuit as described above.
The invention provides a voltage stabilizing circuit and a device, wherein the voltage stabilizing circuit comprises: the compensation module is respectively connected with the primary end of the transformer, the load wire and the zero line, and the secondary end of the transformer is respectively connected with the live wire and the load wire. When the power supply voltage of the compensation module on the load line is not equal to the preset standard voltage, the load line is connected to the primary end of the transformer, so that the power supply voltage is output to the primary end of the transformer; when the primary end of the transformer receives the power supply voltage, the transformer induces a compensation voltage on the secondary end of the transformer so as to compensate the power supply voltage through the compensation voltage. Compared with the prior art that the carbon brush holder moves on the transformer, the carbon brush holder can be worn in the using process along with the longer using time, so that the carbon brush holder cannot better contact the transformer, and the accurate voltage cannot be output.
Drawings
FIG. 1 is a schematic diagram of a voltage stabilizing circuit according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a voltage stabilizing circuit according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a second embodiment of a voltage regulator circuit according to the present invention;
FIG. 4 is a schematic diagram of a first mode of a schematic diagram of a voltage stabilizing circuit according to a second embodiment of the present invention;
FIG. 5 is a schematic diagram of a second mode of the schematic diagram of the first circuit in the second embodiment of the voltage stabilizing circuit of the present invention;
FIG. 6 is a second schematic circuit diagram of a second embodiment of a voltage regulator circuit of the present invention;
FIG. 7 is a schematic diagram of a voltage stabilizing circuit according to a third embodiment of the present invention;
FIG. 8 is a schematic circuit diagram of a third embodiment of a voltage stabilizing circuit according to the present invention.
Reference numerals illustrate:
the achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The technical solutions 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 apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments, all embodiments obtained by persons skilled in the art based on the embodiments in the present invention without making creative efforts, belong to the protection scope of the present invention.
It should be noted that the descriptions of "first," "second," etc. in the embodiments of the present invention are 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, features defining "first" and "second" may explicitly or implicitly include at least one such feature, and further, the technical solutions between the various embodiments may be combined with one another, but must be based on the fact that one of ordinary skill in the art can implement such a combination, and such combination should be considered to be absent or outside the scope of the claimed invention when such combination is inconsistent or otherwise unrealizable.
Referring to fig. 1, fig. 1 is a schematic diagram of a voltage stabilizing circuit according to a first embodiment of the present invention.
In this embodiment, the voltage stabilizing circuit includes: the compensation module 100 and the transformer 200.
The compensation module 100 is respectively connected with a primary end N1 of the transformer, a load line and a zero line, and a secondary end N2 of the transformer is respectively connected with a live wire and the load line.
The compensation module 100 is configured to access the load line to the primary transformer terminal N1 when the power supply voltage on the load line is not equal to a preset standard voltage, so that the power supply voltage is output to the primary transformer terminal N1.
The load line may be a power supply line connecting the transformer auxiliary terminal N2 and the load R. One end of the load R is connected with the load line, and the other end of the load R is connected with the zero line, so that a power supply loop is formed. If the transformer secondary terminal N2 is replaced with a wire, the live wire and the load wire are the same power supply line.
It will be appreciated that the supply voltage may be the voltage on the load line that supplies the load R. The utility grid may output a supply voltage onto the hot wire, which is then provided to the load R via the load line to power the load R. The first end of the auxiliary end N2 of the transformer is connected with a load R, the second end of the auxiliary end N2 of the transformer is connected with a commercial power grid, a power supply line between the commercial power grid and the second end of the auxiliary end N2 of the transformer is a live wire, and a power supply line between the first end of the auxiliary end N2 of the transformer and the load R is a load line.
It should be noted that the preset standard voltage may be a power supply voltage actually required by the load, and the preset standard voltage may be set by a technician based on a power supply requirement of a user. In an ideal case, the supply voltage provided to the load should be consistent with the preset standard voltage, but the supply voltage fluctuates due to the overlong supply line (live wire or load line) or the unstable load of the supply line, and the supply voltage provided to the load R deviates from the preset standard voltage, so that the requirement of the user using the load R cannot be satisfied.
In a specific implementation, the compensation module 100 is connected to a load line to collect a supply voltage output to the load R on the load line, compare the supply voltage with the preset standard voltage, determine that the supply voltage has fluctuated when the supply voltage is not equal to the preset standard voltage, and then connect the load line to the primary transformer end N1, that is, connect a loop between the secondary transformer end N2 and the primary transformer end N1, and output the supply voltage to the primary transformer end, so that a voltage is induced on the secondary transformer end N2 to compensate the supply voltage.
It should be understood that, the transformer auxiliary end N2 of the transformer 200 is disposed between the utility power grid and the load R, and when the compensation module 100 is connected to the primary end N1 of the transformer, the transformer auxiliary end N2 can operate as an inductor and does not affect the supply voltage.
The transformer 200 is configured to induce a compensation voltage on the transformer secondary terminal N2 when the transformer primary terminal N1 receives the supply voltage, so as to compensate the supply voltage by using the compensation voltage.
In a specific implementation, when the transformer 200 receives the supply voltage at the primary transformer terminal N1, the compensation module 100 may be connected to a zero line, thereby forming a loop, the supply voltage is used as an input, and the primary transformer terminal N1 may induce the compensation voltage at the secondary transformer terminal N2. Because the auxiliary end N2 of the transformer is connected between the live wire and the load wire, the compensation voltage can compensate the power supply voltage on the load wire, when the power supply voltage is lower than the preset standard voltage, the primary end N1 of the transformer can induce the compensation voltage which is the same as the reverse direction of the power supply voltage on the auxiliary end N2 of the transformer, so that the power supply voltage is increased, correspondingly, when the power supply voltage is higher than the preset standard voltage, the primary end N1 of the transformer can induce the compensation voltage which is opposite to the reverse direction of the power supply voltage on the auxiliary end N2 of the transformer, so that the power supply voltage is reduced, the compensation of the power supply voltage can be realized based on the direction of the compensation voltage, the problem that the carbon brush frame cannot better contact the transformer due to abrasion is avoided, and the voltage regulation precision is effectively improved.
The voltage stabilizing circuit of the embodiment comprises: the compensation module is respectively connected with the primary end of the transformer, the load wire and the zero line, and the secondary end of the transformer is respectively connected with the live wire and the load wire. When the power supply voltage of the compensation module on the load line is not equal to the preset standard voltage, the load line is connected to the primary end of the transformer, so that the power supply voltage is output to the primary end of the transformer; when the primary end of the transformer receives the power supply voltage, the transformer induces a compensation voltage on the secondary end of the transformer so as to compensate the power supply voltage through the compensation voltage. Compared with the prior art that the carbon brush frame is moved on the transformer, the carbon brush frame is worn along with the lengthening of the service time, so that the carbon brush frame cannot be in good contact with the transformer in the use process, and the accurate voltage cannot be output, and the voltage stabilizing circuit effectively avoids the problem that the carbon brush frame cannot be in good contact with the transformer due to abrasion in the use process, so that the accurate voltage cannot be output, and the voltage regulating precision is effectively improved.
Referring to fig. 2, fig. 2 is a schematic diagram of a voltage stabilizing circuit according to a second embodiment of the present invention.
Based on the first embodiment described above, in this embodiment, the compensation module includes: a driving unit 101, a first switching tube Q1, and a compensation unit 102.
The driving unit 101 is connected with the control end of the first switching tube Q1, the input end of the first switching tube Q1 is connected with the load line, the output end of the first switching tube Q1 is connected with the compensating unit 102, and the compensating unit 102 is respectively connected with the primary end N1 of the transformer and the zero line.
The driving unit 101 is configured to collect the supply voltage on the load line and compare the supply voltage with the preset standard voltage.
In a specific implementation, the driving unit 101 may be a chip with a voltage collecting function and a voltage comparing function, the preset standard voltage may be input into the driving unit 101 as a reference voltage, and the driving unit 101 may collect a power supply voltage output to the load R on the load line and then compare with the preset standard voltage.
The driving unit 101 is further configured to control the first switching tube Q1 to be closed when the supply voltage is not equal to the preset standard voltage, and connect the load line to the transformer primary N1, so that the supply voltage is output to the transformer primary N1.
It should be noted that, the first switching tube Q1 may be a MOS tube, such as an NMOS tube and a PMOS tube, and the present embodiment and the following embodiments are all described by taking the NMOS tube as an example, but the present invention is not limited thereto. Accordingly, the input end of the first switching tube Q1 may be the drain electrode of the first switching tube Q1, the output end of the first switching tube Q1 may be the source electrode of the first switching tube Q1, and the control end of the first switching tube Q1 may be the gate electrode of the first switching tube Q1.
In a specific implementation, the compensation unit 102 may be used to drive the transformer primary end N1 to induce the compensation voltage and the direction of the generated compensation voltage at the transformer secondary end N2, and the first switching tube Q1 may be an NMOS tube, and is disposed between the load line and the compensation unit 102, and is used as a switching device for switching on or off the compensation unit 102. When the driving unit 101 detects that the power supply voltage is not equal to the preset standard voltage, a high-level signal is output to the gate of the first switching tube Q1, so that the first switching tube Q1 is closed, and a load line is connected to the compensating unit, at this time, the primary transformer terminal N1 and the compensating unit 102 can form a loop through the load line and the zero line, and the power supply voltage is output to the primary transformer terminal N1, so that the transformer 200 generates a compensating voltage to compensate the power supply voltage.
Further, referring to fig. 3, fig. 3 is a schematic diagram of a first circuit of a second embodiment of the voltage stabilizing circuit of the present invention.
As shown in fig. 3, in this embodiment, the compensation unit 102 includes: the first silicon controlled rectifier D01, the second silicon controlled rectifier D02, the third silicon controlled rectifier D03 and the fourth silicon controlled rectifier D04.
The first end of the first silicon controlled rectifier D01 is connected with the first end of the transformer primary end N1, the second end of the first silicon controlled rectifier D01 is connected with the output end of the first switching tube Q1, and the control end of the first silicon controlled rectifier D01 is connected with the driving unit 101. The first end of the second silicon controlled rectifier D02 is connected with the second end of the transformer primary end N1, the second end of the second silicon controlled rectifier D02 is connected with a zero line, and the control end of the second silicon controlled rectifier D02 is connected with the driving unit 101; the first end of the third controllable silicon D03 is connected with the second end of the transformer primary end N1, the second end of the third controllable silicon D03 is connected with the output end of the first switch tube Q1, and the control end of the third controllable silicon D03 is connected with the driving unit 101; the first end of the fourth silicon controlled rectifier D04 is connected with the first end of the transformer primary end N1, the second end of the fourth silicon controlled rectifier D04 is connected with a zero line, and the control end of the fourth silicon controlled rectifier D04 is connected with the driving unit 101.
The driving unit 101 is further configured to drive the first silicon controlled rectifier D01 to be closed when the power supply voltage is greater than the preset standard voltage, drive the load line to be connected to a first end of the primary end N1 of the transformer, drive the second silicon controlled rectifier D02 to be closed, and connect the zero line to be connected to a second end of the primary end N1 of the transformer, so that a step-down compensation loop between the primary end N1 of the transformer and the secondary end N2 of the transformer is conducted.
It should be noted that the first to fourth thyristors D01 to D04 may be triacs that are conductive in both the forward and reverse directions. The driving unit 101 may control the conduction and conduction directions of the first to fourth thyristors D01 to D04 by outputting corresponding signals to the control terminals of the first to fourth thyristors D01 to D04.
In a specific implementation, when the power supply voltage is higher than the preset standard voltage, the power supply voltage is higher, and the power supply voltage needs to be reduced to meet the requirement of a user. At this time, the driving unit 101 may drive the first thyristor D01 and the second thyristor D02 to be closed. For ease of understanding, the description is given with reference to fig. 4, but the present solution is not limited thereto. Fig. 4 is a schematic diagram of a first mode of a schematic diagram of a first circuit in a second embodiment of the voltage stabilizing circuit of the present invention, where the first mode may be a mode when both the first thyristor D01 and the second thyristor D02 are closed and both the third thyristor D03 and the fourth thyristor D04 are opened, and in fig. 4, when both the first thyristor D01 and the second thyristor D02 are closed, the load line may be connected to the first end of the primary end N1 of the transformer through the first thyristor D01, the zero line may be connected to the second end of the primary end N1 of the transformer through the second thyristor D02, at this time, a step-down compensation loop formed by the secondary end N2 of the transformer and the primary end N1 of the transformer is turned on, and a current direction of the step-down compensation loop flows from the first thyristor D01 to the second thyristor D02, i.e., the first end of the primary end N1 of the transformer flows to the second end of the primary end N1 of the transformer.
The primary end N1 of the transformer is used for receiving the power supply voltage through the step-down compensation loop, and inducing a reverse compensation voltage opposite to the power supply voltage in the direction of the secondary end N2 of the transformer so as to reduce the power supply voltage through the reverse compensation voltage.
In a specific implementation, as shown in fig. 4, a first end of the auxiliary transformer end N2 is connected to a load line, a second end of the auxiliary transformer end N2 is connected to a live line, and a first end of the primary transformer end N1 and a second end of the auxiliary transformer end N2 are identical-name ends. When the step-down compensation circuit is turned on, current flows from the first end of the primary transformer end N1 to the second end of the primary transformer end N1, at this time, the first end of the primary transformer end N1 is a positive end, the second end of the primary transformer end N1 is a negative end, so that the second end of the secondary transformer end N2 is a positive end, and the first end of the secondary transformer end N2 is a compensation voltage of a negative end, therefore, the direction of the compensation voltage is from the first end of the secondary transformer end N2 to the second end of the secondary transformer end N2, and the direction of the supply voltage is from the second end of the secondary transformer end N2 to the first end of the secondary transformer end N2.
The driving unit 101 is further configured to drive the third thyristor D03 to be closed when the supply voltage is smaller than the preset standard voltage, connect the load line to the second end of the primary end N1 of the transformer, and drive the fourth thyristor D04 to be closed, connect the zero line to the first end of the primary end N1 of the transformer, so that a boost compensation loop between the primary end of the transformer and the secondary end of the transformer is turned on.
In a specific implementation, when the power supply voltage is smaller than the preset standard voltage, the power supply voltage is lower, and the power supply voltage needs to be raised to meet the user requirement. At this time, the driving unit 101 may drive the third thyristor D03 and the second thyristor D04 to be closed. For ease of understanding, the description is given with reference to fig. 5, but the present solution is not limited thereto. Fig. 5 is a schematic diagram of a second mode of a schematic diagram of a first circuit in a second embodiment of the voltage stabilizing circuit of the present invention, where the second mode may be a mode when both the first thyristor D03 and the fourth thyristor D04 are closed, and the first thyristor D01 and the second thyristor D02 are both open, and in fig. 4, when both the third thyristor D03 and the fourth thyristor D04 are closed, the zero line may be connected to the second end of the primary transformer N1 through the third thyristor D03, the load line may be connected to the first end of the primary transformer N1 through the fourth thyristor D04, at this time, a boost compensation loop formed by the secondary transformer N2 and the primary transformer N1 is turned on, and a current direction of the boost compensation loop flows from the third thyristor D03 to the fourth thyristor D04, i.e., the second end of the primary transformer N1 flows to the first end of the primary transformer N1.
The primary end N1 of the transformer is used for receiving the power supply voltage through the boost compensation loop, and inducing the same-direction compensation voltage with the power supply voltage direction on the secondary end N2 of the transformer so as to boost the power supply voltage through the same-direction compensation voltage.
In a specific implementation, as shown in fig. 5, when the boost compensation circuit is turned on, a current flows from the second end of the primary transformer N1 to the first end of the primary transformer N1, at this time, the second end of the primary transformer N1 is a positive end, the first end of the primary transformer N1 is a negative end, so that a compensation voltage of the first end of the secondary transformer N2 is induced on the secondary transformer N2, and the second end of the secondary transformer N2 is a negative end, so that the direction of the compensation voltage is from the second end of the secondary transformer N2 to the first end of the secondary transformer N2, and the direction of the supply voltage is from the second end of the secondary transformer N2 to the first end of the secondary transformer N2.
It should be understood that, in this embodiment, when the power supply voltage is greater than the preset standard voltage, the first thyristor and the second thyristor are driven to be closed, the step-down compensation circuit is conducted to reduce the power supply voltage, and when the power supply voltage is less than the preset standard voltage, the third thyristor and the dead thyristor are driven to be closed, and the step-up compensation circuit is conducted to increase the power supply voltage, so that fluctuation of the power supply voltage is avoided, and accuracy of the power supply voltage output to the load is improved.
Further, referring to fig. 6, fig. 6 is a second schematic circuit diagram of a voltage stabilizing circuit according to a second embodiment of the present invention.
As shown in fig. 6, in this embodiment, the voltage stabilizing circuit further includes: and a second switching tube Q2.
The input end of the second switching tube Q2 is respectively connected with the second end of the second controllable silicon D02 and the second end of the fourth controllable silicon D04, and the output end of the second switching tube Q2 is connected with the zero line.
The driving unit 101 is further configured to control the second switching tube Q2 to be closed when the voltage difference between the supply voltage and the preset standard voltage exceeds a preset stable range, and connect the zero line to the second thyristor D02 and/or the fourth thyristor D04, so that the transformer 200 compensates the supply voltage.
The preset stable range may be a voltage range for determining whether the fluctuation of the power supply voltage is within the stable range. That is, if the voltage difference between the power supply voltage and the preset standard voltage is within the preset stable range, it may be determined that the fluctuation of the power supply voltage is within the stable range, and no adjustment is required; correspondingly, if the voltage difference between the power supply voltage and the preset standard voltage exceeds the preset stable range, the fluctuation of the power supply voltage can be judged to be in the unstable range, and the fluctuation is large and needs to be adjusted.
It is understood that the second switching transistor Q2 may be a MOS transistor, such as an NMOS transistor and a PMOS transistor, and the present embodiment and the following embodiments are both described by taking the NMOS transistor as an example, but the present invention is not limited thereto. Correspondingly, the input end of the second switching tube Q2 may be the drain electrode of the second switching tube Q2, the output end of the second switching tube Q2 may be the source electrode of the second switching tube Q2, and the control end of the second switching tube Q2 may be the gate electrode of the second switching tube Q2.
In a specific implementation, the second switching tube Q2 is located between the compensation unit 102 and the neutral line, and the closing and opening of the second switching tube Q controls whether the neutral line is connected to the compensation unit 102. When the driving unit 101 detects that the supply voltage is not equal to the preset standard voltage, it may continuously detect whether a voltage difference between the supply voltage and the preset standard voltage is in the preset stable range, if the voltage difference is not in the preset stable range, it may determine that the supply voltage deviation is large, and it is necessary to compensate the supply voltage, and at this time, a high-level trigger signal may be output to the second switching tube Q2 to close the second switching tube Q2, so that the zero line is connected to the compensating unit 102, specifically, if the second thyristor D02 is connected, the buck compensating circuit is turned on, and if the fourth thyristor D04 is connected, the boost compensating circuit is turned on.
It should be understood that, when the driving unit 101 detects that the voltage difference between the supply voltage and the preset standard voltage is within the preset stable range, it determines that the supply voltage fluctuation is small, and no adjustment is needed, and at this time, the first switching tube Q1 is closed, but the second switching tube Q2 is controlled to be opened, so that the zero line cannot be connected to the compensation unit 102, and thus the boost compensation circuit or the buck compensation circuit cannot be turned on, and the supply voltage is not compensated.
The driving unit 101 is further configured to control the second switching tube Q2 to be turned off when the voltage difference between the compensated supply voltage and the preset standard voltage is within the preset stable range, so that the transformer stops compensating the supply voltage.
In a specific implementation, after the power supply voltage is compensated, if the voltage difference between the power supply voltage and the preset standard voltage is detected to be in the preset stable range, it may be determined that the compensated power supply voltage deviation is smaller and is in the stable range, and no compensation is required for the power supply voltage, at this time, a low-level trigger signal may be output to the second switching tube Q2, so that the second switching tube Q2 is turned off, and the zero line cannot be connected to the compensation unit 102, specifically, if the voltage-reducing compensation circuit is turned on, the zero line cannot be connected to the second thyristor D02, and if the voltage-increasing compensation circuit is turned on, the zero line cannot be connected to the fourth thyristor D04.
It should be understood that, in this embodiment, the transformer 200 is controlled to compensate the supply voltage when the voltage difference between the supply voltage and the preset standard voltage exceeds the preset stable range; when the voltage difference between the compensated power supply voltage and the preset standard voltage is within the preset stable range, the transformer 200 is controlled to stop compensating the power supply voltage. The problem that the power supply voltage is still compensated when the fluctuation of the power supply voltage is in a stable range without compensation is avoided, the precision of power supply voltage regulation is effectively improved, and then the voltage stabilizing efficiency is improved.
Referring to fig. 7, fig. 7 is a schematic diagram of a voltage stabilizing circuit according to a third embodiment of the present invention.
Based on the above embodiments, in this embodiment, the voltage stabilizing circuit further includes: switching module 300 and autotransformer N3.
The switching module 300 is respectively connected with each tap end of the autotransformer N3, the second end of the first thyristor D01 and the second end of the third thyristor D03, the first end of the autotransformer N3 is connected with the output end of the first switching tube Q1, and the second end of the autotransformer N3 is connected with the zero line.
Each tap end of the autotransformer N3 is a tap end between a first end of the autotransformer N3 and a second end of the autotransformer N3, and each tap end of the autotransformer N3 is graded in order from the first end of the autotransformer N3 to the second end of the autotransformer.
The driving unit 101 is further configured to control the switching module 300 to connect an initial tap terminal of the autotransformer to the first scr D01 and/or the third scr D03 when the supply voltage is not equal to the preset standard voltage, so that the autotransformer N3 induces a regulated voltage based on the initial tap terminal.
When the power supply voltage is not equal to the preset standard voltage, that is, when the power supply voltage fluctuates, the power supply voltage needs to be compensated to stabilize the power supply voltage. However, once the number of turns of the primary and secondary windings of the transformer 200 is determined, the magnitude of the compensation voltage is determined uniquely, and cannot be changed, when the fluctuation of the supply voltage exceeds the preset stability range and is at the boundary value of the preset stability range, if the compensation voltage is used to compensate the supply voltage, there may be an excessive compensation situation, for example, the voltage difference between the initial supply voltage and the preset standard voltage is just at the minimum value of the preset stability range, after the compensation, the voltage difference may exceed the maximum value of the preset stability range, and exceed the preset stability range, and the requirement is still not satisfied.
It is understood that the initial tap end may be the tap end connected to the switching module 300, and the initial tap end may be the tap end adjacent to the second end of the autotransformer N3, or may be preset by a technician from the tap ends of the autotransformer N3, which is not limited in this embodiment.
For ease of understanding, the description is given with reference to fig. 8, but the present solution is not limited thereto. FIG. 8 is a schematic circuit diagram of a third embodiment of a voltage stabilizing circuit according to the present invention. In fig. 8, the switching module 300 includes: and a plurality of gating thyristors corresponding to the tap ends of the autotransformer N3.
The first end of each gating silicon controlled rectifier is respectively connected with each tap end of the autotransformer N3, and the second end of each gating silicon controlled rectifier is respectively connected with the second end of the first silicon controlled rectifier D01 and the second end of the third silicon controlled rectifier D03; the control terminal of each gate thyristor is connected to the driving unit 101.
It should be noted that, if the tap end between the first end and the second end of the autotransformer N3 is set to N, the number of corresponding gating thyristors is also N, and each gating thyristor is sequentially connected with each level of tap end. For easy understanding, the first gating thyristor D1 connected to the first tap terminal is set, and the n gating thyristor Dn connected to the n tap terminal is set.
In a specific implementation, when the driving unit detects that the supply voltage is not equal to the preset standard voltage, it controls the initial gating thyristors corresponding to the initial tap end in the switching module 300 to be closed, so that the initial tap end is connected to the first thyristors D01 and/or the third thyristors D02, if the supply voltage is greater than the preset standard voltage, the initial tap end is connected to the first thyristors D01 to conduct the buck compensation circuit, and correspondingly, if the supply voltage is less than the preset standard voltage, the initial tap end is connected to the third thyristors D03 to conduct the boost compensation circuit, and the autotransformer N3 can induce a regulating voltage on the initial tap end based on coils at two sides of the initial tap end.
It should be understood that the initial tap terminal is located between the first terminal and the second terminal of the autotransformer N3, and the first terminal of the autotransformer N3 is connected to the supply voltage when the first switching tube Q1 is closed, so that the regulated voltage induced by the autotransformer N3 is lower than the supply voltage. In order to improve the adjustment accuracy, the initial tap terminal may be set to be the tap terminal adjacent to the second terminal of the autotransformer N3, so as to minimize the induced adjustment voltage, and further prevent the compensation voltage induced by the transformer 200 from being too large and exceeding the boundary value of the preset voltage stabilizing range (the minimum value and the maximum value of the preset voltage stabilizing range), thereby avoiding the problem of excessive compensation for the supply voltage and improving the adjustment accuracy of the boundary voltage (the voltage of the supply voltage at the boundary value of the preset voltage stabilizing range). The number of taps of the autotransformer N3 may be set by a technician, and the greater the number of taps, the higher the accuracy of the output adjustment voltage, so that the accuracy of the compensation voltage induced by the transformer 200 becomes higher, thereby improving the accuracy of compensating the supply voltage.
The autotransformer N3 is configured to output the regulated voltage to the first scr D01 and/or the third scr D03, so that the transformer 200 compensates the supply voltage based on the regulated voltage.
In a specific implementation, the autotransformer N3 may output the induced adjustment voltage to the first scr D01 and/or the third scr D03, and correspondingly, when the first scr D01 is closed, the adjustment voltage may be used as the input voltage of the buck compensation loop, and when the third scr D03 is closed, the adjustment voltage may be used as the input voltage of the boost compensation loop. The original end N1 of the transformer can induce the compensation voltage on the auxiliary end N2 of the transformer based on the regulating voltage, so that the problem that the compensation of the power supply voltage is excessive due to the fact that the compensation voltage is directly induced based on the power supply voltage is avoided, and the precision of the compensation of the power supply voltage is effectively improved.
Further, in this embodiment, the driving unit 101 is further configured to control the switching module 300 to switch the initial tap end to a previous tap end of the initial tap end when the voltage difference between the compensated power supply voltage and the preset standard voltage is not in the preset stable range, until the voltage difference between the compensated power supply voltage and the preset standard voltage is in the preset stable range.
In a specific implementation, after the transformer 200 induces the compensation voltage to compensate the supply voltage based on the adjustment voltage generated by the initial tap, the driving unit determines that the initial adjustment voltage of the initial tap is insufficient to stabilize the supply voltage and needs to increase the adjustment voltage when it is detected that the voltage difference between the compensated supply voltage and the preset standard voltage is not within the preset stability range and the magnitude relationship between the compensated supply voltage and the preset standard voltage is consistent with the magnitude relationship before compensation. Therefore, the driving unit 101 may control the upper-stage gating thyristors corresponding to the upper-stage tap end of the initial tap end in the switching module 300 to be closed, so that the initial tap end is connected to the first thyristor D01 and/or the third thyristor D02, the autotransformer N3 may induce an adjustment voltage on the upper-stage tap end based on the coils at both sides of the upper-stage tap end, and the transformer may induce a compensation voltage to compensate the supply voltage based on the updated adjustment voltage.
It should be understood that, since the updated regulating voltage is the voltage induced by the autotransformer N3 based on the previous tap of the initial tap, the updated regulating voltage is greater than the regulating voltage induced by the initial tap, so as to increase the magnitude of the compensation voltage. When the updated regulating voltage still cannot stabilize the power supply voltage in the preset stabilizing range, the current tap end can be continuously switched to the last tap end of the current tap end to repeat the process until the voltage difference between the compensated power supply voltage and the preset standard voltage is in the preset stabilizing range.
It should be noted that, when the initial tap end is not the tap end adjacent to the second end of the autotransformer N3, and the voltage difference between the supply voltage before compensation and the preset standard voltage is not in the preset stable range, and the magnitude relation between the supply voltage after compensation and the preset standard voltage based on the initial tap end is opposite to the magnitude relation before compensation, for example, the supply voltage before compensation is smaller than the preset standard voltage, the supply voltage after compensation is greater than the preset standard voltage, and still not in the preset stable range, it may be determined that the adjustment voltage induced by the initial tap end is larger, and at this time, the next tap end of the initial tap end may be switched to the initial tap end, and the process is repeated until the voltage difference between the supply voltage after compensation and the preset standard voltage is in the preset stable range.
It can be appreciated that, in this embodiment, when the voltage difference between the compensated power supply voltage and the preset standard voltage is not in the preset stable range, the switching module 300 is controlled to switch the initial tap end to the previous tap end of the initial tap end until the voltage difference between the compensated power supply voltage and the preset standard voltage is in the preset stable range, so that the problem of excessive compensation for the power supply voltage is avoided, the precision of compensation for the power supply voltage is effectively improved, and the precision of voltage stabilization is further improved.
Further, to achieve the above object. The embodiment of the invention also provides a voltage stabilizing device which comprises the voltage stabilizing circuit.
The embodiments or specific implementation manner of the voltage stabilizing device of the present invention may refer to the above-mentioned voltage stabilizing circuit embodiments, and will not be repeated herein.
Other embodiments or specific implementations of the stream data writing device of the present invention may refer to the above method embodiments, and will not be described herein.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system 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 system. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
The foregoing description is only of the preferred embodiments of the present invention, and is not intended to limit the scope of the invention, but rather is intended to cover any equivalents of the structures or equivalent processes disclosed herein or in the alternative, which may be employed directly or indirectly in other related arts.

Claims (10)

1. A voltage stabilizing circuit, characterized in that the voltage stabilizing circuit comprises: a compensation module and a transformer;
the compensation module is respectively connected with the primary end of the transformer, the load wire and the zero wire, and the secondary end of the transformer is respectively connected with the live wire and the load wire;
the compensation module is used for connecting the load line to the primary end of the transformer when the power supply voltage on the load line is not equal to the preset standard voltage, so that the power supply voltage is output to the primary end of the transformer;
and the transformer is used for inducing a compensation voltage on the auxiliary end of the transformer when the primary end of the transformer receives the power supply voltage so as to compensate the power supply voltage through the compensation voltage.
2. The voltage regulator circuit of claim 1, wherein the compensation module comprises: the driving unit, the first switching tube and the compensating unit;
the driving unit is connected with the control end of the first switching tube, the input end of the first switching tube is connected with the load line, the output end of the first switching tube is connected with the compensation unit, and the compensation unit is respectively connected with the original end of the transformer and the zero line;
The driving unit is used for collecting the power supply voltage on the load line and comparing the power supply voltage with the preset standard voltage;
and the driving unit is also used for controlling the first switching tube to be closed when the power supply voltage is not equal to the preset standard voltage, and connecting the load line into the primary end of the transformer so as to enable the power supply voltage to be output to the primary end of the transformer.
3. The voltage stabilizing circuit of claim 2, wherein the compensation unit includes: the first silicon controlled rectifier, the second silicon controlled rectifier, the third silicon controlled rectifier and the fourth silicon controlled rectifier;
the first end of the first controllable silicon is connected with the first end of the original end of the transformer, the second end of the first controllable silicon is connected with the output end of the first switch tube, and the control end of the first controllable silicon is connected with the driving unit;
the first end of the second silicon controlled rectifier is connected with the second end of the original end of the transformer, the second end of the second silicon controlled rectifier is connected with a zero line, and the control end of the second silicon controlled rectifier is connected with the driving unit;
the first end of the third controllable silicon is connected with the second end of the original end of the transformer, the second end of the third controllable silicon is connected with the output end of the first switch tube, and the control end of the third controllable silicon is connected with the driving unit;
The first end of the fourth silicon controlled rectifier is connected with the first end of the original end of the transformer, the second end of the fourth silicon controlled rectifier is connected with the zero line, and the control end of the fourth silicon controlled rectifier is connected with the driving unit.
4. The voltage stabilizing circuit according to claim 3, wherein said driving unit is further configured to drive said first thyristor to close, said load line to be connected to a first end of said primary transformer, and said second thyristor to close, said zero line to be connected to a second end of said primary transformer, so as to conduct a step-down compensation loop between said primary transformer and said secondary transformer when said supply voltage is greater than said preset standard voltage;
the primary end of the transformer is used for receiving the power supply voltage through the step-down compensation loop and inducing a reverse compensation voltage with the direction opposite to that of the power supply voltage on the secondary end of the transformer so as to reduce the power supply voltage through the reverse compensation voltage.
5. The voltage stabilizing circuit according to claim 4, wherein the driving unit is further configured to drive the third thyristor to close when the supply voltage is less than the preset standard voltage, to connect the load line to the second end of the primary end of the transformer, and to drive the fourth thyristor to close, to connect the zero line to the first end of the primary end of the transformer, so as to conduct a boost compensation loop between the primary end of the transformer and the secondary end of the transformer;
The primary end of the transformer is used for receiving the power supply voltage through the boost compensation loop, and the same-direction compensation voltage with the power supply voltage is induced on the secondary end of the transformer, so that the power supply voltage is boosted through the same-direction compensation voltage.
6. The voltage regulator circuit of claim 5, further comprising: a second switching tube;
the input end of the second switching tube is respectively connected with the second end of the second controllable silicon and the second end of the fourth controllable silicon, and the output end of the second switching tube is connected with the zero line;
the driving unit is further configured to control the second switching tube to be closed when a voltage difference between the power supply voltage and the preset standard voltage exceeds a preset stable range, and access the zero line to the second silicon controlled rectifier and/or the fourth silicon controlled rectifier, so that the transformer compensates the power supply voltage;
and the driving unit is also used for controlling the second switching tube to be disconnected when the voltage difference between the compensated power supply voltage and the preset standard voltage is in the preset stable range so as to stop the transformer from compensating the power supply voltage.
7. The voltage stabilizing circuit according to any one of claims 3 to 6, wherein the voltage stabilizing circuit further comprises: a switching module and an autotransformer;
the switching module is respectively connected with each tap end of the autotransformer, the second end of the first silicon controlled rectifier and the second end of the third silicon controlled rectifier, the first end of the autotransformer is connected with the output end of the first switching tube, and the second end of the autotransformer is connected with the zero line;
each tap end of the autotransformer is a tap end between a first end of the autotransformer and a second end of the autotransformer, and the tap ends of the autotransformer are graded in the order from the first end of the autotransformer to the second end of the autotransformer;
the driving unit is further configured to control the switching module to connect an initial tap terminal of the autotransformer to the first silicon controlled rectifier and/or the third silicon controlled rectifier when the supply voltage is not equal to the preset standard voltage, so that the autotransformer induces an adjustment voltage based on the initial tap terminal;
the autotransformer is used for outputting the regulating voltage to the first controllable silicon and/or the third controllable silicon, so that the transformer compensates the power supply voltage based on the regulating voltage.
8. The voltage stabilizing circuit of claim 7, wherein the driving unit is further configured to control the switching module to switch the initial tap to a previous tap of the initial tap when a voltage difference between the compensated supply voltage and the preset standard voltage is not within the preset stable range, until the voltage difference between the compensated supply voltage and the preset standard voltage is within the preset stable range.
9. The voltage regulator circuit of claim 8, wherein the switching module comprises: a plurality of gating thyristors corresponding to tap ends of the autotransformer;
the first end of each gating silicon controlled rectifier is respectively connected with each tap end of the autotransformer, and the second end of each gating silicon controlled rectifier is respectively connected with the second end of the first silicon controlled rectifier and the second end of the third silicon controlled rectifier; and the control end of each gating silicon controlled rectifier is connected with the driving unit.
10. A voltage stabilizing device, characterized in that it comprises a voltage stabilizing circuit according to any one of claims 1 to 9.
CN202311395150.2A 2023-10-25 2023-10-25 Voltage stabilizing circuit and device Pending CN117335671A (en)

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CN202311395150.2A CN117335671A (en) 2023-10-25 2023-10-25 Voltage stabilizing circuit and device

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Application Number Priority Date Filing Date Title
CN202311395150.2A CN117335671A (en) 2023-10-25 2023-10-25 Voltage stabilizing circuit and device

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CN117335671A true CN117335671A (en) 2024-01-02

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