CN117373792A - Transformer, multi-level power supply modulation circuit, control method and device - Google Patents

Transformer, multi-level power supply modulation circuit, control method and device Download PDF

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Publication number
CN117373792A
CN117373792A CN202210777041.6A CN202210777041A CN117373792A CN 117373792 A CN117373792 A CN 117373792A CN 202210777041 A CN202210777041 A CN 202210777041A CN 117373792 A CN117373792 A CN 117373792A
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CN
China
Prior art keywords
magnetic
secondary winding
wound
magnetic column
winding
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CN202210777041.6A
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Chinese (zh)
Inventor
王林国
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ZTE Corp
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ZTE Corp
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Priority to CN202210777041.6A priority Critical patent/CN117373792A/en
Priority to PCT/CN2023/102503 priority patent/WO2024002025A1/en
Publication of CN117373792A publication Critical patent/CN117373792A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • H01F27/24—Magnetic cores
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • 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
    • H01F27/24—Magnetic cores
    • H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
    • H01F27/266—Fastening or mounting the core on casing or support
    • 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
    • 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
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • 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
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • 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
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
    • H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
    • H02M7/06—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • H02M7/068—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode mounted on a transformer
    • 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
    • H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/505—Conversion of dc power input into ac power output without possibility of reversal 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
    • H02M7/515—Conversion of dc power input into ac power output without possibility of reversal 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

Abstract

The invention provides a transformer, a multi-level power supply modulation circuit, a control method and a device, wherein the transformer comprises at least two magnetic columns, at least one primary winding and a plurality of secondary windings; the cross-sectional area of each magnetic column is not identical; wherein: the primary winding is wound on at least two magnetic columns, and the secondary winding is wound on one or more magnetic columns wound by the primary winding. By arranging the magnetic columns with different sectional areas, the magnetic flux of different secondary windings on the magnetic columns can be different without adjusting the number of turns of the secondary windings, so that the secondary windings wound on the magnetic columns with different sectional areas can output different voltage values, and the increase of the impedance and the loss of the secondary windings is avoided on the basis of realizing different voltage output.

Description

Transformer, multi-level power supply modulation circuit, control method and device
Technical Field
The present invention relates to the field of transformers, and in particular, to a transformer, a multi-level power supply modulation circuit, a control method and a control device.
Background
The prior transformer generally comprises a middle post and two side posts, wherein a primary side winding and a secondary side winding are wound on the middle post to form a closed magnetic circuit from the middle post to the side posts, magnetic flux generated by the primary side is all coupled through the secondary side winding, and the voltage transformation ratio of the primary side and the secondary side is the ratio of turns of the winding. In order to reduce the impedance and loss of the windings, in the application of low-voltage high-current output, such as 12V output, the number of turns of the windings on the secondary side is usually designed to be 1 turn, and multiple windings are added on the secondary side to realize multiple output voltages, and other voltage amplitudes can only be integer multiples of 12V, such as 24V and 36V, so that non-integer multiple output such as 16V cannot be obtained. To obtain two paths of output of 12V and 16V, the number of turns of the two secondary windings is changed into 3 turns and 4 turns, and at the moment, the length of the windings is increased by 3 times and 4 times, and the impedance and loss of the windings are increased.
Disclosure of Invention
The invention mainly aims to provide a multi-level power supply modulation circuit, a multi-level power supply modulation circuit control method and a multi-level power supply modulation circuit control device, and aims to solve the problem that the impedance and loss of a secondary winding are increased when multi-type voltages are required to be output in the prior art.
To achieve the above object, the present invention provides a transformer comprising at least two magnetic poles, at least one primary winding and a plurality of secondary windings; the cross-sectional area of each magnetic column is not identical; wherein:
the primary winding is wound on at least two magnetic columns, and the secondary winding is wound on one or more magnetic columns wound by the primary winding.
Optionally, the ratio of the sum of the cross-sectional areas of all the magnetic poles wound by each secondary winding is the same as the ratio between the output voltages of each secondary winding.
Optionally, the magnetic pole comprises a first magnetic pole and a second magnetic pole, and the secondary winding comprises a first secondary winding and a second secondary winding; wherein:
the primary winding is wound on the first magnetic column and the second magnetic column, the first secondary winding is wound on the first magnetic column, and the second secondary winding is wound on the second magnetic column.
Optionally, the magnetic columns include a first magnetic column, a second magnetic column, a third magnetic column, and a fourth magnetic column; the primary winding comprises a first primary winding and a second primary winding; the secondary winding comprises a first secondary winding, a second secondary winding, a third secondary winding and a fourth secondary winding; wherein:
the first primary winding is wound on the first magnetic column and the second magnetic column, the first secondary winding is wound on the first magnetic column, and the second secondary winding is wound on the second magnetic column;
the second primary winding is wound on the third magnetic column and the fourth magnetic column, the third secondary winding is wound on the third magnetic column, and the fourth secondary winding is wound on the fourth magnetic column.
Optionally, the magnetic columns include a first magnetic column, a second magnetic column, a third magnetic column, a fourth magnetic column, a fifth magnetic column, and a sixth magnetic column; the primary winding comprises a first primary winding and a second primary winding; the secondary winding comprises a first secondary winding, a second secondary winding, a third secondary winding, a fourth secondary winding, a fifth secondary winding, a sixth secondary winding, a seventh secondary winding and an eighth secondary winding; wherein:
the first primary winding is wound on the first magnetic column, the second magnetic column and the third magnetic column, the first secondary winding is wound on the first magnetic column, the second secondary winding is wound on the second magnetic column, the third secondary winding is wound on the third magnetic column, and the fourth secondary winding is wound on the second magnetic column and the third magnetic column;
the second primary winding is wound on the fourth magnetic column, the fifth magnetic column and the sixth magnetic column, the fifth secondary winding is wound on the fourth magnetic column, the sixth secondary winding is wound on the fifth magnetic column, the seventh secondary winding is wound on the sixth magnetic column, and the eighth secondary winding is wound on the fifth magnetic column and the sixth magnetic column.
In addition, in order to achieve the above object, the present invention provides a multi-level power supply modulation circuit including an ac output module, a plurality of rectifying modules, a plurality of switches, and a transformer as described above; wherein:
the output end of the alternating current output module is connected with the primary winding of the transformer, one secondary winding of the transformer is correspondingly connected with the input end of one rectifying module, and the output end of one rectifying module is correspondingly connected with a load through one switch;
the transformer is used for outputting a voltage corresponding to the cross-sectional area of the magnetic pole wound by each secondary winding to the rectifying module.
Optionally, the circuit further includes a plurality of first capacitors, each of the first capacitors is connected in series, and one of the first capacitors is correspondingly connected between one of the rectifying modules and one of the switches; wherein:
the first end of the first capacitor is connected with the positive electrode output end of the rectifying module, the first end of the first capacitor is also connected with the load through the switch, and the second end of the first capacitor is connected with the negative electrode output end of the rectifying module.
Optionally, the ac output module includes a power supply, an inverter bridge, an inductor, a second capacitor, and a control unit; wherein:
the positive electrode input end of the inverter bridge is connected with the positive electrode of the power supply, the negative electrode input end of the inverter bridge is connected with the negative electrode of the power supply, the first output end of the inverter bridge is connected with the first end of the primary winding sequentially through the inductor and the second capacitor, and the second output end of the inverter bridge is connected with the second end of the primary winding; and the control end of the inverter bridge is connected with the control unit.
In addition, to achieve the above object, the present invention also provides a control method of a multi-level power supply modulation circuit, the method being applied to the multi-level power supply modulation circuit as described above, the method comprising:
acquiring the ratio of the cross-sectional areas of the magnetic columns in the transformer through the alternating current output module, and taking the sum of elements in the ratio as a basic amplitude;
outputting an alternating current signal with the amplitude being an integer multiple of the basic amplitude to the primary winding through the alternating current output module;
and outputting an output voltage with the same ratio between the ratio and the sectional area through the transformer.
Optionally, the step of outputting an ac signal having an amplitude that is an integer multiple of the base amplitude to the primary winding includes:
the amplification factor is obtained through the control unit, a modulation signal is generated according to the amplification factor and the basic amplitude, and the modulation signal is sent to the inverter bridge;
and outputting the alternating current signal to the primary winding through the inverter bridge according to the modulation signal.
Optionally, the step of obtaining the magnification includes:
obtaining a preset output voltage value corresponding to each secondary winding and the turn ratio of the primary winding to the secondary winding;
taking the sum of the preset output voltage values as a basic output voltage value;
the result of dividing the base output voltage value by the product of the base amplitude value and the turns ratio is taken as the amplification factor.
In addition, in order to achieve the above object, the present invention also provides a multi-level power supply modulation apparatus including a housing and a multi-level power supply modulation circuit provided in the housing, the multi-level power supply modulation circuit being configured as the multi-level power supply modulation circuit described above or applied to the multi-level power supply modulation circuit control method described above.
The invention provides a transformer, a multi-level power supply modulation circuit, a control method and a device, wherein the transformer comprises at least two magnetic columns, at least one primary winding and a plurality of secondary windings; the cross-sectional area of each magnetic column is not identical; wherein: the primary winding is wound on at least two magnetic columns, and the secondary winding is wound on one or more magnetic columns wound by the primary winding. By arranging the magnetic columns with different sectional areas, the magnetic flux of different secondary windings on the magnetic columns can be different without adjusting the number of turns of the secondary windings, so that the secondary windings wound on the magnetic columns with different sectional areas can output different voltage values, and the increase of the impedance and the loss of the secondary windings is avoided on the basis of realizing different voltage output.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a transformer according to the present invention;
FIG. 2 is a diagram showing a specific construction of an embodiment of a transformer according to the present invention;
FIG. 3 is a specific block diagram of an embodiment of a transformer according to the present invention;
FIG. 4 is a diagram showing a specific construction of an embodiment of a transformer according to the present invention;
fig. 5 is a circuit configuration diagram of the multi-level power supply modulation circuit of the present invention.
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.
Reference numerals illustrate:
reference numerals Name of the name Reference numerals Name of the name
WP Primary winding D1 Inverter bridge
WS Secondary winding L1 Inductance
M Magnetic column C1～C2 First capacitor-second capacitor
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 following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear are used in the embodiments of the present invention) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.
Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is 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 at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a transformer according to the present invention. In this embodiment, the transformer comprises at least two magnetic poles M, at least one primary winding WP and a plurality of secondary windings WS; the sectional areas of the magnetic columns M are not completely the same; wherein:
the primary winding WP is wound on at least two of the magnetic poles M, and the secondary winding WS is wound on one or more of the magnetic poles M wound by the primary winding WP.
It will be appreciated that the magnetic pole M may be fixedly arranged or detachably arranged, and that when the magnetic pole M is in a detached arrangement, in practical applications, a suitable magnetic pole M may be installed into the transformer as required. It should be noted that the magnetic pillar M may be provided so that there is an unreeled magnetic pillar M. It will be appreciated that a closed loop needs to be formed between the magnetic columns M, and a specific arrangement manner may be selected based on actual needs, for example, two ends of each magnetic column M are connected by two conductive flat plates respectively.
The number of turns of the primary winding WP may be set according to actual needs.
After the primary winding WP is energized, a magnetic flux change is generated in the magnetic pole M, and the secondary winding WS generates an induced voltage based on the ratio of the sectional areas of the wound magnetic poles M, specifically, the higher the ratio of the sectional areas of the wound magnetic poles M is, the larger the induced voltage of the secondary winding WS is.
It should be noted that other structures of the transformer may be configured according to actual needs, and are not limited herein.
Further, the ratio of the sum of the cross-sectional areas of all the magnetic poles wound by the secondary windings is the same as the ratio between the output voltages of the secondary windings.
The number of turns of the secondary winding WS is typically set to 1 turn in order to avoid impedance and loss, but may equally be set to multiple turns as desired. When the number of turns of the secondary winding WS corresponding to the magnetic pole wound by the single primary winding is the same, the input voltage, the number of turns of the primary winding and the number of turns of the secondary winding are all determined, so that the output voltage of the secondary winding is only related to the cross-sectional area of the magnetic pole wound by the secondary winding.
If the number of turns of the secondary winding WS is not completely the same, the ratio obtained by multiplying the ratio element of the sectional area of the secondary winding WS corresponding to the wound magnetic column M by the corresponding number of turns of the secondary winding is the same as the ratio of the output voltages of the secondary windings; if the ratio of the sectional areas of the secondary windings WS and the corresponding wound magnetic column M is 3:2:2, the turns ratio corresponding to each secondary winding WS is 1:2:2, the ratio of the output voltages of the secondary windings is 3×1:2×2:2×2=3: 4:4.
according to the embodiment, the magnetic columns M with different sectional areas are arranged, so that the magnetic fluxes of different secondary windings WS on the magnetic columns M can be different under the condition that the number of turns of the secondary windings WS is not required to be adjusted, further, the secondary windings WS wound on the magnetic columns M with different sectional areas can output different voltage values, and the increase of the impedance and the loss of the secondary windings WS is avoided on the basis of realizing different voltage output.
The transformer of the present invention will be described below by means of different arrangement modes of the magnetic poles M and winding modes.
1. The magnetic pole M comprises a first magnetic pole M1 and a second magnetic pole M2, and the secondary winding WS comprises a first secondary winding WS1 and a second secondary winding WS2; wherein:
the primary winding WP is wound on the first magnetic pillar M1 and the second magnetic pillar M2, the first secondary winding WS1 is wound on the first magnetic pillar M1, and the second secondary winding WS2 is wound on the second magnetic pillar M2.
Referring to fig. 2, taking an example that the input voltage is 56V, the number of turns of the primary winding WP is 2, the number of turns of the secondary winding WS is 1, the cross-sectional area of the first magnetic pillar M1 is 3, and the cross-sectional area of the second magnetic pillar M2 is 4; wherein the third magnetic pillar M3 and the fourth magnetic pillar M4 are not wound;
when the primary winding WP is energized, the magnetic flux generated by the primary winding WP changes to:
wherein V is in For input voltage, N p For the number of turns of the primary winding WP, phi p As the magnetic flux, the magnetic flux passes through the first magnetic pillar M1 and the second magnetic pillar M2, a part of the magnetic flux passes through the first magnetic pillar M1 and is coupled to the first secondary winding WS1, a part of the magnetic flux passes through the second magnetic pillar M2 and is coupled to the second secondary winding WS2, and the output voltage ratio of the first secondary winding WS1 and the second secondary winding WS 2=the magnetic flux ratio=the ratio of the cross sectional areas of the first magnetic pillar M1 and the second magnetic pillar M2=3: 4, a step of; the output voltage of the secondary winding WS is:
wherein V is si For the output voltage of the ith secondary winding WS, S i Is the sum of the sectional areas S of the magnetic columns M wound by the ith secondary winding WS Z The sum of the sectional areas of the magnetic columns M wound by the primary winding WP;
the output voltage of the first secondary winding WS1 is 28×3/7=12v; the output voltage of the second secondary winding WS2 is 28×4/7=16v;
2. the magnetic columns M comprise a first magnetic column M1, a second magnetic column M2, a third magnetic column M3 and a fourth magnetic column M4; the primary winding WP comprises a first primary winding WP1 and a second primary winding WP2; the secondary winding WS comprises a first secondary winding WS1, a second secondary winding WS2, a third secondary winding WS3 and a fourth secondary winding WS4; wherein:
the first primary winding WP1 is wound on the first magnetic pillar M1 and the second magnetic pillar M2, the first secondary winding WS1 is wound on the first magnetic pillar M1, and the second secondary winding WS2 is wound on the second magnetic pillar M2;
the second primary winding WP2 is wound on the third magnetic pillar M3 and the fourth magnetic pillar M4, the third secondary winding WS3 is wound on the third magnetic pillar M3, and the fourth secondary winding WS4 is wound on the fourth magnetic pillar M4.
Referring to fig. 3, taking an example that the input voltage is 56V, the number of turns of the primary winding WP is 2, the number of turns of the secondary winding WS is 1, the sectional areas of the first magnetic pillar M1 and the third magnetic pillar M3 are 3, and the sectional areas of the second magnetic pillar M2 and the fourth magnetic pillar M4 are 4; the first magnetic pillar M1 is disposed opposite to the third magnetic pillar M3, and the second magnetic pillar M2 is disposed opposite to the fourth magnetic pillar M4.
After the first primary winding WP1 is energized, the generated magnetic flux passes through the first magnetic pillar M1 and the second magnetic pillar M2, a part of the magnetic flux is coupled to the first secondary winding WS1 through the first magnetic pillar M1, a part of the magnetic flux is coupled to the second secondary winding WS2 through the second magnetic pillar M2, and the ratio of the output voltages of the first secondary winding WS1 and the second secondary winding WS 2=the ratio of the magnetic fluxes=the ratio of the cross sectional areas of the first magnetic pillar M1 and the second magnetic pillar M2=3: 4, a step of; the output voltage of the first secondary winding WS1 is 28×3/7=12v; the output voltage of the second secondary winding WS2 is 28×4/7=16v;
after the second primary winding WP2 is energized, the generated magnetic flux passes through the third magnetic pillar M3 and the fourth magnetic pillar M4, a part of the magnetic flux is coupled to the third secondary winding WS3 through the third magnetic pillar M3, a part of the magnetic flux is coupled to the fourth secondary winding WS4 through the fourth magnetic pillar M4, and the ratio of the output voltages of the third secondary winding WS3 and the fourth secondary winding WS 4=the ratio of the magnetic fluxes=the ratio of the cross sectional areas of the third magnetic pillar M3 and the fourth magnetic pillar M4=3: 4, a step of; the output voltage of the third secondary winding WS3 is available as 28 x 3/7=12v; the output voltage of the fourth secondary winding WS4 is 28×4/7=16v;
3. the magnetic columns M comprise a first magnetic column M1, a second magnetic column M2, a third magnetic column M3, a fourth magnetic column M4, a fifth magnetic column M5 and a sixth magnetic column M6; the primary winding WP comprises a first primary winding WP1 and a second primary winding WP2; the secondary winding WS comprises a first secondary winding WS1, a second secondary winding WS2, a third secondary winding WS3, a fourth secondary winding WS4, a fifth secondary winding WS5, a sixth secondary winding WS6, a seventh secondary winding WS7 and an eighth secondary winding WS8; wherein:
the first primary winding WP1 is wound on the first magnetic pillar M1, the second magnetic pillar M2 and the third magnetic pillar M3, the first secondary winding WS1 is wound on the first magnetic pillar M1, the second secondary winding WS2 is wound on the second magnetic pillar M2, the third secondary winding WS3 is wound on the third magnetic pillar M3, and the fourth secondary winding WS4 is wound on the second magnetic pillar M2 and the third magnetic pillar M3;
the second primary winding WP2 is wound on the fourth magnetic pillar M4, the fifth magnetic pillar M5 and the sixth magnetic pillar M6, the fifth secondary winding WS5 is wound on the fourth magnetic pillar M4, the sixth secondary winding WS6 is wound on the fifth magnetic pillar M5, the seventh secondary winding WS7 is wound on the sixth magnetic pillar M6, and the eighth secondary winding WS8 is wound on the fifth magnetic pillar M5 and the sixth magnetic pillar M6.
Referring to fig. 4, taking an example that the input voltage is 56V, the number of turns of the primary winding WP is 2, the number of turns of the secondary winding WS is 1, the sectional areas of the first magnetic pillar M1 and the fourth magnetic pillar M4 are 3, the sectional areas of the second magnetic pillar M2, the third magnetic pillar M3, the fifth magnetic pillar M5, and the sixth magnetic pillar M6 are 2; the first magnetic column M1 is disposed opposite to the fourth magnetic column M4, the second magnetic column M2 is disposed opposite to the fifth magnetic column M5, and the third magnetic column M3 is disposed opposite to the sixth magnetic column M6.
After the first primary winding WP1 is energized, the generated magnetic flux passes through the first magnetic pole M1, the second magnetic pole M2 and the third magnetic pole M3, a part of the magnetic flux passes through the first magnetic pole M1 and is coupled with the first secondary winding WS1, a part of the magnetic flux passes through the second magnetic pole M2 and is coupled with the second secondary winding WS2, a part of the magnetic flux passes through the third magnetic pole M3 and is coupled with the third magnetic pole M3 and the fourth secondary winding WS4, and a part of the magnetic flux passes through the second magnetic pole M2 and is coupled with the third magnetic pole M3 and the fourth secondary winding WS4 at the same time, wherein the output voltage ratio of the first secondary winding WS1, the second secondary winding WS2, the third secondary winding WS3 and the fourth secondary winding WS 4=the magnetic flux ratio=the ratio of the cross-sectional areas of the first magnetic pole M1, the second magnetic pole M2, the third magnetic pole M3 and the second magnetic pole M2+the third magnetic pole M3=3: 2:2:4, a step of; the output voltage of the first secondary winding WS1 is 28×3/7=12v; the output voltage of the second secondary winding WS2 is 28 x 2/7=8v; the output voltage of the third secondary winding WS3 is 28×2/7=8v; the output voltage of the fourth secondary winding WS4 is 28×4/7=16v;
after the second primary winding WP2 is energized, the generated magnetic flux passes through the fourth magnetic pole M4, the fifth magnetic pole M5, and the sixth magnetic pole M6, a part of the magnetic flux passes through the fourth magnetic pole M4 and is coupled to the fifth secondary winding WS5, a part of the magnetic flux passes through the fifth magnetic pole M5 and is coupled to the sixth secondary winding WS6, a part of the magnetic flux passes through the sixth magnetic pole M6 and is coupled to the seventh secondary winding WS7, and a part of the magnetic flux passes through the fifth magnetic pole M5 and is coupled to the sixth magnetic pole M6 and the eighth secondary winding WS8, and the output voltage ratio of the fifth secondary winding WS5, the sixth secondary winding WS6, the seventh secondary winding WS7, and the eighth secondary winding WS 8=the magnetic flux ratio=the ratio of the cross-sectional areas of the fourth magnetic pole M4, the fifth magnetic pole M5, the sixth magnetic pole M6, and the fifth magnetic pole M5+the sixth magnetic pole M6=3: 2:2:4, a step of; the output voltage of the fifth secondary winding WS5 is 28×3/7=12v; the output voltage of the sixth secondary winding WS6 is 28×2/7=8v; the output voltage of the seventh secondary winding WS7 is 28×2/7=8v; the output voltage of the eighth secondary winding WS8 is 28×4/7=16v.
It should be noted that the foregoing is merely illustrative of the present invention, and other embodiments of the present invention can be set by referring to the foregoing illustrative analogy, and will not be described herein.
In addition, the present invention also provides a multi-level power supply modulation circuit, please refer to fig. 5, fig. 5 is a functional block diagram of an embodiment of the multi-level power supply modulation circuit of the present invention. In this embodiment, the multi-level power modulation circuit includes an ac output module, a plurality of rectifying modules, a plurality of switches, and a transformer as described above; wherein:
the output end of the alternating current output module is connected with the primary winding of the transformer, one secondary winding of the transformer is correspondingly connected with the input end of one rectifying module, and the output end of one rectifying module is correspondingly connected with a load through one switch.
The alternating current output module is used for providing alternating current input voltage for the transformer, the primary winding of the transformer is electrified through the alternating current input voltage to generate magnetic flux on the magnetic column, and the secondary winding of the transformer outputs alternating current induction voltage; the alternating current induction is rectified through a rectifying module to obtain direct current output voltage, and the switch is used for determining which secondary winding corresponds to the direct current output voltage;
the transformer is used for outputting a voltage corresponding to the cross-sectional area of the magnetic pole wound by each secondary winding to the rectifying module.
It can be appreciated that the rectifying module in this embodiment may be selected according to actual needs, such as a rectifying bridge, a half-wave rectifying circuit, etc.; the description is not limited thereto.
Further, the circuit further includes a plurality of first capacitors C1, each of the first capacitors C1 is connected in series, and one of the first capacitors C1 is correspondingly connected between one of the rectifying modules and one of the switches; wherein:
the first end of the first capacitor C1 is connected with the positive electrode output end of the rectifying module, the first end of the first capacitor C1 is also connected with the load through the switch, and the second end of the first capacitor C1 is connected with the negative electrode output end of the rectifying module.
Charging a connected first capacitor C1 when the rectifying module outputs voltage, and outputting the voltage to a load through the first capacitor C1 when the switch is closed; it can be understood that the first capacitors C1 are connected in series, so that when the switch is closed, the first capacitor C1 with the first end connected to the switch and the output voltage of the first capacitor C1 connected to the second end of the first capacitor C1 and the following first capacitor C1 are output to the load through the switch after being superimposed.
Further, the ac output module includes a power supply, an inverter bridge D1, an inductor L1, a second capacitor C2, and a control unit (not shown); wherein:
the positive input end of the inverter bridge D1 is connected with the positive electrode of the power supply, the negative input end of the inverter bridge D1 is connected with the negative electrode of the power supply, the first output end of the inverter bridge D1 is connected with the first end of the primary winding through the inductor L1 and the second capacitor C2 in sequence, and the second output end of the inverter bridge D1 is connected with the second end of the primary winding; the control end of the inverter bridge D1 is connected with the control unit.
The power supply is a direct current power supply, the direct current input by the power supply is converted into alternating current through the inverter bridge D1, and the alternating current is output to the primary winding through the second capacitor C2 of the inductor L1; the inductor L1 and the second capacitor C2 form a filter circuit; the control unit is used for outputting a PWM signal to the inverter bridge D1 to control the magnitude of the alternating voltage output by the inverter bridge D1.
In the embodiment, the multi-level power supply modulation circuit is constructed by applying the transformer, so that multiple paths of outputs with different voltages can be realized through one transformer.
In addition, the invention also provides a control method of the multi-level power supply modulation circuit, the method is applied to the multi-level power supply modulation circuit, and the method comprises the following steps:
s10, obtaining the ratio of the cross-sectional areas of the magnetic columns in the transformer through the alternating current output module, and taking the sum of elements in the ratio as a basic amplitude;
step S20, outputting an alternating current signal with the amplitude being an integer multiple of the basic amplitude to the primary winding through the alternating current output module;
step S30, outputting the output voltage with the same ratio between the ratio and the sectional area through the transformer.
Taking sections of the magnetic columns as 3, 2 and 2 respectively as examples; i.e. the ratio between the cross-sectional areas of the three magnet posts is 3:2:2; the elements contained therein are 3, 2 and 2, and therefore, the result 7 of 3+2+2 is taken as the base amplitude; and the sections of the magnetic columns are respectively 6, 4 and 4; the ratio between the cross-sectional areas of the three magnet posts is then likewise 3:2:2; the elements contained therein are 3, 2 and 2, and therefore, the result 7 of 3+2+2 is also taken as the base amplitude.
The alternating current output module outputs an alternating current signal with the amplitude being integral multiple of the basic amplitude, so that the output voltage of the transformer is also integral. When the output voltage is not required to be an integer, the amplitude of the ac signal output by the ac output module may not be limited to an integer multiple of the basic amplitude.
The larger the cross-sectional area of the pole in the transformer, the larger the corresponding magnetic flux and the larger the output voltage of the corresponding secondary winding.
Further, the step S20 includes:
step S21, obtaining the amplification factor through a control unit, generating a modulation signal according to the amplification factor and the basic amplitude, and sending the modulation signal to an inverter bridge;
and S22, outputting the alternating current signal to the primary winding through the inverter bridge according to the modulation signal.
The amplification factor is the ratio of a preset output voltage value to a basic amplitude value; meanwhile, when the structure of the transformer is unchanged, the ratio of the preset output voltage value to the alternating current signal output by the inverter bridge is consistent, so that the size of the alternating current signal to be output can be determined through the amplification factor and the basic amplitude, and a corresponding modulation signal is generated according to the size of the alternating current signal to be output; it can be understood that the switching tubes in the inverter bridge are controlled by the modulation signals, and the voltage output of the inverter bridge can be correspondingly adjusted by generating different modulation signals.
Further, the step S21 includes:
step S211, obtaining a preset output voltage value corresponding to each secondary winding and a turns ratio of the primary winding to the secondary winding;
step S212, taking the sum of the preset output voltage values as a basic output voltage value;
step S213, dividing the basic output voltage value by the product of the basic amplitude and the turns ratio, as the amplification factor.
The preset output voltage value is set by a user, and the ratio of the corresponding preset output voltage value of each secondary winding is consistent with the ratio of the cross section area of the magnetic column wound by the corresponding preset output voltage value; the basic output voltage value obtained by presetting the sum of the output voltage values is the required total output voltage value, under the condition that the output voltage is ensured to be an integer output, the basic amplitude is the minimum amplitude of the alternating current signal serving as the input voltage, and the turn ratio reflects the conversion ratio between the input voltage and the output voltage, so that the amplification factor of the total output voltage value relative to the basic copy can be obtained through the parameters, and specifically, the amplification factor is as follows:
wherein F is i An i-th element in the ratio between the cross-sectional areas of the magnetic pillars; t is the turns ratio of the primary winding to the secondary winding.
The embodiment can accurately calculate the amplification factor.
The method is applied to a multi-level power supply modulation circuit, and the structure of the multi-level power supply modulation circuit can refer to the above embodiment, and is not described herein again. The implementation process is consistent with the foregoing structural embodiment, and reference may be made to execution.
The invention also provides a multi-level power supply modulation device, which comprises a shell and a multi-level power supply modulation circuit, wherein the multi-level power supply modulation circuit is arranged in the shell, and the structure of the multi-level power supply modulation circuit can refer to the embodiment and is not repeated herein. It should be noted that, since the multi-level power supply modulation device of the present embodiment adopts the technical scheme of the multi-level power supply modulation circuit, the multi-level power supply modulation device has all the beneficial effects of the multi-level power supply modulation circuit.
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 (12)

1. A transformer comprising at least two magnetic poles, at least one primary winding and a plurality of secondary windings; the cross-sectional area of each magnetic column is not identical; wherein:
the primary winding is wound on at least two magnetic columns, and the secondary winding is wound on one or more magnetic columns wound by the primary winding.
2. The transformer of claim 1, wherein a ratio of a sum of cross-sectional areas of all magnetic poles wound by each of the secondary windings is the same as a ratio between output voltages of each of the secondary windings.
3. The transformer of claim 2, wherein the magnetic leg comprises a first magnetic leg and a second magnetic leg, and the secondary winding comprises a first secondary winding and a second secondary winding; wherein:
the primary winding is wound on the first magnetic column and the second magnetic column, the first secondary winding is wound on the first magnetic column, and the second secondary winding is wound on the second magnetic column.
4. The transformer of claim 2, wherein the magnetic poles comprise a first magnetic pole, a second magnetic pole, a third magnetic pole, and a fourth magnetic pole; the primary winding comprises a first primary winding and a second primary winding; the secondary winding comprises a first secondary winding, a second secondary winding, a third secondary winding and a fourth secondary winding; wherein:
the first primary winding is wound on the first magnetic column and the second magnetic column, the first secondary winding is wound on the first magnetic column, and the second secondary winding is wound on the second magnetic column;
the second primary winding is wound on the third magnetic column and the fourth magnetic column, the third secondary winding is wound on the third magnetic column, and the fourth secondary winding is wound on the fourth magnetic column.
5. The transformer of claim 2, wherein the magnetic poles comprise a first magnetic pole, a second magnetic pole, a third magnetic pole, a fourth magnetic pole, a fifth magnetic pole, and a sixth magnetic pole; the primary winding comprises a first primary winding and a second primary winding; the secondary winding comprises a first secondary winding, a second secondary winding, a third secondary winding, a fourth secondary winding, a fifth secondary winding, a sixth secondary winding, a seventh secondary winding and an eighth secondary winding; wherein:
the first primary winding is wound on the first magnetic column, the second magnetic column and the third magnetic column, the first secondary winding is wound on the first magnetic column, the second secondary winding is wound on the second magnetic column, the third secondary winding is wound on the third magnetic column, and the fourth secondary winding is wound on the second magnetic column and the third magnetic column;
the second primary winding is wound on the fourth magnetic column, the fifth magnetic column and the sixth magnetic column, the fifth secondary winding is wound on the fourth magnetic column, the sixth secondary winding is wound on the fifth magnetic column, the seventh secondary winding is wound on the sixth magnetic column, and the eighth secondary winding is wound on the fifth magnetic column and the sixth magnetic column.
6. A multi-level power supply modulation circuit, characterized in that the circuit comprises an ac output module, a plurality of rectifying modules, a plurality of switches and a transformer according to any one of claims 1 to 5; wherein:
the output end of the alternating current output module is connected with the primary winding of the transformer, one secondary winding of the transformer is correspondingly connected with the input end of one rectifying module, and the output end of one rectifying module is correspondingly connected with a load through one switch;
the transformer is used for outputting a voltage corresponding to the cross-sectional area of the magnetic pole wound by each secondary winding to the rectifying module.
7. The multi-level power modulation circuit of claim 6, further comprising a plurality of first capacitors, each of the first capacitors being connected in series, one of the first capacitors being connected between one of the rectifying modules and one of the switches, respectively; wherein:
the first end of the first capacitor is connected with the positive electrode output end of the rectifying module, the first end of the first capacitor is also connected with the load through the switch, and the second end of the first capacitor is connected with the negative electrode output end of the rectifying module.
8. The multi-level power supply modulation circuit of claim 6, wherein the ac output module comprises a power supply, an inverter bridge, an inductor, a second capacitor, and a control unit; wherein:
the positive electrode input end of the inverter bridge is connected with the positive electrode of the power supply, the negative electrode input end of the inverter bridge is connected with the negative electrode of the power supply, the first output end of the inverter bridge is connected with the first end of the primary winding sequentially through the inductor and the second capacitor, and the second output end of the inverter bridge is connected with the second end of the primary winding; and the control end of the inverter bridge is connected with the control unit.
9. A method of controlling a multi-level power supply modulation circuit, characterized in that the method is applied to the multi-level power supply modulation circuit according to any one of claims 6 to 8, the method comprising:
acquiring the ratio of the cross-sectional areas of the magnetic columns in the transformer through the alternating current output module, and taking the sum of elements in the ratio as a basic amplitude;
outputting an alternating current signal with the amplitude being an integer multiple of the basic amplitude to the primary winding through the alternating current output module;
and outputting an output voltage with the same ratio between the ratio and the sectional area through the transformer.
10. The method of claim 9, wherein the step of outputting an ac signal having an amplitude that is an integer multiple of the base amplitude to the primary winding comprises:
the amplification factor is obtained through the control unit, a modulation signal is generated according to the amplification factor and the basic amplitude, and the modulation signal is sent to the inverter bridge;
and outputting the alternating current signal to the primary winding through the inverter bridge according to the modulation signal.
11. The method of claim 10, wherein the step of obtaining the amplification factor comprises:
obtaining a preset output voltage value corresponding to each secondary winding and the turn ratio of the primary winding to the secondary winding;
taking the sum of the preset output voltage values as a basic output voltage value;
the result of dividing the base output voltage value by the product of the base amplitude value and the turns ratio is taken as the amplification factor.
12. A multi-level power supply modulation apparatus comprising a housing and a multi-level power supply modulation circuit as claimed in any one of claims 6 to 8, the multi-level power supply modulation circuit being disposed within the housing.
CN202210777041.6A 2022-06-30 2022-06-30 Transformer, multi-level power supply modulation circuit, control method and device Pending CN117373792A (en)

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PCT/CN2023/102503 WO2024002025A1 (en) 2022-06-30 2023-06-26 Transformer, multi-level power supply modulaton circuit, and control method and device

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GB823386A (en) * 1955-01-31 1959-11-11 Sangamo Weston Improvements in or relating to electric transformers
US6348848B1 (en) * 2000-05-04 2002-02-19 Edward Herbert Transformer having fractional turn windings
CN110828126B (en) * 2019-10-14 2023-04-07 华为数字能源技术有限公司 Planar transformer and active circuit
CN114005653B (en) * 2020-07-28 2023-11-10 华为技术有限公司 Transformer, switching power supply and communication equipment
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