CN114221559A - On-load power supply of excitation generator - Google Patents
On-load power supply of excitation generator Download PDFInfo
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- CN114221559A CN114221559A CN202111525556.9A CN202111525556A CN114221559A CN 114221559 A CN114221559 A CN 114221559A CN 202111525556 A CN202111525556 A CN 202111525556A CN 114221559 A CN114221559 A CN 114221559A
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- module
- switching tube
- rectifying
- power supply
- switch
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- 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
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- 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
- H02M1/00—Details of apparatus for conversion
- H02M1/32—Means for protecting converters other than automatic disconnection
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- 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
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
Abstract
The invention relates to the technical field of power supplies, in particular to an excitation generator on-load power supply, which comprises a transformer, a first rectifying module, an auxiliary power taking module, a detection control module, a switch module, an on-load system, a second rectifying module and a boost module; the transformer comprises an input winding, a first output winding, a second output winding and a third output winding; the first output winding is connected with the input end of the first rectifying module; the output end of the first rectifying module is connected with the on-load system through a switch module; the third output winding is connected with a load system; the boost module is connected with the controller. According to the invention, the transformer, the first rectifying module, the auxiliary power taking module, the detection control module, the switch module, the on-load system, the second rectifying module and the boost module are arranged, so that the on-load power supply of the excitation generator can take power at the full rotation speed of the generator, and the effects of low cost and small volume can be realized.
Description
Technical Field
The invention relates to the technical field of power supplies, in particular to an on-load power supply of an excitation generator.
Background
The generator can provide energy for the load at low rotating speed and high rotating speed, the output voltage of the generator is in direct proportion to the rotating speed of the generator, the higher the rotating speed is, the higher the voltage is, the later stage is a fixed load, and the working voltage range is limited to a certain extent.
The conventional method is that the output of the generator is rectified and then added with a stage of DCDC control to realize that the output voltage is stably supplied to a rear stage load; the power supply system has the defects of simplicity and convenience in topological structure, difficulty in realization, high cost, large size and the like. Difficulty 1: the working voltage range of the system is too wide, from dozens of volts to kilovolts, and the control is difficult to realize; difficulty 2: the withstand voltage of the switching tube is selected to be high, the power density of an indirect system is low, and the volume of the system is large; difficulty 3: the high operating voltage of the system results in poor system reliability.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an on-load power supply of an excitation generator.
The purpose of the invention is realized by the following technical scheme: an excitation generator on-load power supply comprises a transformer, a first rectifying module, an auxiliary power taking module, a detection control module, a switch module, an on-load system, a second rectifying module and a boost module;
the transformer comprises an input winding, a first output winding, a second output winding and a third output winding; the number of turns of the first output winding is greater than that of the input winding; the number of turns of the second output winding is less than that of the input winding; the first output winding is connected with the input end of the first rectifying module; the output end of the first rectifying module is connected with the on-load system through a switch module; the detection control module is used for detecting the output end voltage of the first rectifying module; the detection control module is used for controlling the switch module; the second output winding is connected with the auxiliary power taking module; the auxiliary power taking module is used for supplying power to the detection control module and the first rectifying module; the detection control module is connected with the controller;
the third output winding is connected with the on-load system through a second rectifying module and a boost module; the boost module is connected with the controller.
The invention is further provided that a diode D47 is arranged between the output end of the boost module and the loaded system.
The invention is further configured such that the first and second rectifier modules are rectifier bridges.
The boost module further comprises a capacitor C1, an inductor L24 and a switching tube Q70; two ends of the capacitor C1 are respectively connected with the output end of the second rectifying module; one end of the capacitor C1 is connected with the drain electrode of the switching tube Q70 through an inductor L24; the other end of the capacitor C1 is connected with the source electrode of a switching tube Q70; the grid electrode of the switching tube Q70 is connected with a controller; the drain of the switching tube Q70 and the source of the switching tube Q70 are respectively connected with a load system.
The invention further provides that the switch module comprises a switch tube Q69, a switch tube Q68 and a resistor R202; the output end of the first rectifying module is connected with the drain electrode of a switching tube Q69; the source electrode of the switching tube Q69 is connected with the source electrode of the switching tube Q68; the drain electrode of the switching tube Q68 is connected with a load system; the detection control module is respectively connected with the grid electrode of the switching tube Q69 and the grid electrode of the switching tube Q68 through a resistor R202.
The invention is further provided that the excitation generator on-load power supply further comprises a pre-charging module;
the pre-charging module comprises a resistor R201 and a contact switch S14; the controller controls the contact switch S14 to work; the contact switch S14 is connected with the resistor R201 in parallel; one end of the contact switch S14 is connected with a switch module; the other end of the contact switch S14 is connected to a tape carrier system.
The invention has the beneficial effects that: according to the invention, the transformer, the first rectifying module, the auxiliary power taking module, the detection control module, the switch module, the on-load system, the second rectifying module and the boost module are arranged, so that the on-load power supply of the excitation generator can take power at the full rotation speed of the generator, and the effects of low cost and small volume can be realized.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be derived on the basis of the following drawings without inventive effort.
FIG. 1 is a circuit schematic of the present invention;
wherein: 1. a transformer; 11. a first output winding; 12. a second output winding; 13. a third output winding; 14. an input winding; 2. a first rectifying module; 3. an auxiliary power taking module; 4. a detection control module; 5. and a second rectifying module.
Detailed Description
The invention is further described with reference to the following examples.
As shown in fig. 1, the on-load power supply of the excitation generator in this embodiment includes a transformer 1, a first rectification module 2, an auxiliary power taking module 3, a detection control module 4, a switch module, an on-load system, a second rectification module 5, and a boost module;
the transformer 1 comprises an input winding 14, a first output winding 11, a second output winding 12 and a third output winding 13; the number of turns of the first output winding 11 is greater than that of the input winding 14; the number of turns of the second output winding 12 is less than that of the input winding 14; the first output winding 11 is connected with the input end of the first rectifying module 2; the output end of the first rectifying module 2 is connected with the on-load system through a switch module; the detection control module 4 is used for detecting the output end voltage of the first rectifying module 2; the detection control module 4 is used for controlling the switch module; the second output winding 12 is connected with the auxiliary power taking module 3; the auxiliary power taking module 3 is used for supplying power to the detection control module 4 and the first rectifying module 2; the detection control module 4 is connected with the controller;
the third output winding 13 is connected with the on-load system through the second rectifying module 5 and the boost module; the boost module is connected with the controller.
Specifically, in the excitation generator on-load power supply of this embodiment, when the generator is at a low rotation speed, the output voltage of the generator is low, the generator is connected to the input winding 14, the voltage is boosted on the first output winding 11 by using the transformer 1, and the basic voltage output by the system is satisfied by the first rectification module 2 and the switch module; meanwhile, the voltage reduction function of the transformer 1 is utilized to output the voltage in the second output winding 12 to the auxiliary power taking module 3, and in addition, because the auxiliary power supply voltage is too wide, the full-range control is difficult to achieve, the power supply range width is reduced by adopting a voltage reduction mode; thereby supplying power to the detection control module 4 and the first rectification module 2.
When the generator is in a high rotating speed state, the detection control module 4 detects that the output voltage of the first output winding 11 is higher than DC600V, the switch module is controlled to be turned off, the system power supply is switched to the voltage output by the third output winding 13 of the transformer 1 to supply power to the system, the third output winding 13 is connected with the boost module after passing through the second rectifying module 5, and if the output voltage is not enough, the boost module boosts the voltage and supplies power to the on-load system. After the rotating speed of the generator is reduced, the detection control module 4 restarts the conduction switch module when detecting that the output voltage of the first output winding 11 is lower than 600V, and power is supplied through the first output winding 11.
This embodiment is through above-mentioned setting for excitation generator on-load power can get the electricity under the full rotational speed of generator, can realize low cost and small effect simultaneously.
In the excitation generator on-load power supply according to this embodiment, a diode D47 is disposed between the output end of the boost module and the on-load system. Specifically, the diode D47 is arranged between the boost module and the switch module for connection control, and the diode D47 simultaneously performs a voltage supply seamless switching process, so that when the two paths of voltage are not uniform, the two paths of voltage can be ensured not to influence each other.
In the excitation generator on-load power supply of this embodiment, the first rectification module 2 and the second rectification module 5 are both rectifier bridges. The first rectifying module 2 and the second rectifying module 5 can realize rectification conveniently through the arrangement.
In the excitation generator on-load power supply of this embodiment, the boost module includes a capacitor C1, an inductor L24, and a switching tube Q70; two ends of the capacitor C1 are respectively connected with the output end of the second rectifying module 5; one end of the capacitor C1 is connected with the drain electrode of the switching tube Q70 through an inductor L24; the other end of the capacitor C1 is connected with the source electrode of a switching tube Q70; the grid electrode of the switching tube Q70 is connected with a controller; the drain of the switching tube Q70 and the source of the switching tube Q70 are respectively connected with a load system.
Specifically, through the arrangement, the controller can control the switching tube Q70 to act through PWM, so as to play a role in boost.
In the on-load power supply of the excitation generator in this embodiment, the switch module includes a switch tube Q69, a switch tube Q68, and a resistor R202; the output end of the first rectifying module 2 is connected with the drain electrode of a switching tube Q69; the source electrode of the switching tube Q69 is connected with the source electrode of the switching tube Q68; the drain electrode of the switching tube Q68 is connected with a load system; the detection control module 4 is connected to the gate of the switching tube Q69 and the gate of the switching tube Q68 through a resistor R202.
When the generator is in a high rotating speed state, the detection control module 4 detects that the output voltage of the first output winding 11 is higher than DC600V, the detection control module 4 performs turn-off control on the switching tube Q68 and the switching tube Q69, the system power supply is switched to the voltage output by the third output winding 13 of the transformer 1 to supply power to the system, the third output winding 13 passes through the second rectifying module 5 and then is connected with the boost module, and if the output voltage is not enough, the boost module boosts the voltage and then supplies power to the on-load system. When the rotation speed of the generator is reduced and the detection control module 4 detects that the output voltage of the first output winding 11 is lower than 600V, the switching tube Q68 and the switching tube Q69 are turned on, and power is supplied through the first output winding 11.
In the excitation generator on-load power supply of this embodiment, the excitation generator on-load power supply further includes a pre-charge module;
the pre-charging module comprises a resistor R201 and a contact switch S14; the controller controls the contact switch S14 to work; the contact switch S14 is connected with the resistor R201 in parallel; one end of the contact switch S14 is connected with a switch module; the other end of the contact switch S14 is connected to a tape carrier system.
Specifically, when the rotation speed is reduced after the high rotation speed protection, the protection is recovered when the voltage of the first output winding 11 is lower than 600V, and in order to prevent the switching tube Q68 and the switching tube Q69 from being damaged by overcurrent due to the voltage difference between the switching module and the boost module during recovery, the contact switch S14 and the pre-charging resistor R201 are added in the system, so that the pre-charging function is realized.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. An excitation generator on-load power supply is characterized in that: the power supply device comprises a transformer (1), a first rectifying module (2), an auxiliary power taking module (3), a detection control module (4), a switch module, a load system, a second rectifying module (5) and a boost module;
the transformer (1) comprises an input winding (14), a first output winding (11), a second output winding (12) and a third output winding (13); the number of turns of the first output winding (11) is greater than that of the input winding (14); the number of turns of the second output winding (12) is less than that of the input winding (14); the first output winding (11) is connected with the input end of the first rectifying module (2); the output end of the first rectifying module (2) is connected with the on-load system through a switch module; the detection control module (4) is used for detecting the voltage of the output end of the first rectifying module (2); the detection control module (4) is used for controlling the switch module; the second output winding (12) is connected with the auxiliary power taking module (3); the auxiliary power taking module (3) is used for supplying power to the detection control module (4) and the first rectifying module (2); the detection control module (4) is connected with the controller;
the third output winding (13) is connected with the on-load system through a second rectifying module (5) and a boost module; the boost module is connected with the controller.
2. An excitation generator on-board power supply as claimed in claim 1, wherein: and a diode D47 is arranged between the output end of the boost module and the on-load system.
3. An excitation generator on-board power supply as claimed in claim 1, wherein: the first rectifying module (2) and the second rectifying module (5) are both rectifier bridges.
4. An excitation generator on-board power supply as claimed in claim 1, wherein: the boost module comprises a capacitor C1, an inductor L24 and a switching tube Q70; two ends of the capacitor C1 are respectively connected with the output end of the second rectifying module (5); one end of the capacitor C1 is connected with the drain electrode of the switching tube Q70 through an inductor L24; the other end of the capacitor C1 is connected with the source electrode of a switching tube Q70; the grid electrode of the switching tube Q70 is connected with a controller; the drain of the switching tube Q70 and the source of the switching tube Q70 are respectively connected with a load system.
5. An excitation generator on-board power supply as claimed in claim 1, wherein: the switch module comprises a switch tube Q69, a switch tube Q68 and a resistor R202; the output end of the first rectifying module (2) is connected with the drain electrode of a switching tube Q69; the source electrode of the switching tube Q69 is connected with the source electrode of the switching tube Q68; the drain electrode of the switching tube Q68 is connected with a load system; the detection control module (4) is respectively connected with the grid electrode of the switching tube Q69 and the grid electrode of the switching tube Q68 through a resistor R202.
6. An excitation generator on-board power supply as claimed in claim 1, wherein: the excitation generator on-load power supply also comprises a pre-charging module;
the pre-charging module comprises a resistor R201 and a contact switch S14; the controller controls the contact switch S14 to work; the contact switch S14 is connected with the resistor R201 in parallel; one end of the contact switch S14 is connected with a switch module; the other end of the contact switch S14 is connected to a tape carrier system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111525556.9A CN114221559B (en) | 2021-12-14 | 2021-12-14 | On-load power supply of excitation generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111525556.9A CN114221559B (en) | 2021-12-14 | 2021-12-14 | On-load power supply of excitation generator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114221559A true CN114221559A (en) | 2022-03-22 |
| CN114221559B CN114221559B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111525556.9A Active CN114221559B (en) | 2021-12-14 | 2021-12-14 | On-load power supply of excitation generator |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035300A (en) * | 2010-12-29 | 2011-04-27 | 重庆运达科技有限公司 | Multifunctional internal combustion arc welding generator |
| CN206343741U (en) * | 2016-12-23 | 2017-07-21 | 上海沪工焊接集团股份有限公司 | Welding machine power supply circuit |
| CN113339132A (en) * | 2021-06-30 | 2021-09-03 | 重庆华世丹动力科技股份有限公司 | Auxiliary power supply convenient for low-speed starting of direct-current generator |
-
2021
- 2021-12-14 CN CN202111525556.9A patent/CN114221559B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102035300A (en) * | 2010-12-29 | 2011-04-27 | 重庆运达科技有限公司 | Multifunctional internal combustion arc welding generator |
| CN206343741U (en) * | 2016-12-23 | 2017-07-21 | 上海沪工焊接集团股份有限公司 | Welding machine power supply circuit |
| CN113339132A (en) * | 2021-06-30 | 2021-09-03 | 重庆华世丹动力科技股份有限公司 | Auxiliary power supply convenient for low-speed starting of direct-current generator |
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| Publication number | Publication date |
|---|---|
| CN114221559B (en) | 2023-09-22 |
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