CN106786593B - Agricultural machinery power supply system - Google Patents
Agricultural machinery power supply system Download PDFInfo
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- CN106786593B CN106786593B CN201710024491.7A CN201710024491A CN106786593B CN 106786593 B CN106786593 B CN 106786593B CN 201710024491 A CN201710024491 A CN 201710024491A CN 106786593 B CN106786593 B CN 106786593B
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- voltage
- direct
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- converter
- current voltage
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- 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
- H02J3/02—Circuit arrangements for ac mains or ac distribution networks using a single network for simultaneous distribution of power at different frequencies; using a single network for simultaneous distribution of ac power and of dc power
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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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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Control Of Charge By Means Of Generators (AREA)
- Control Of Eletrric Generators (AREA)
Abstract
According to the agricultural machinery power supply system, the direct-current voltage and/or alternating-current voltage output by the generator are processed by the voltage converter and/or the rectifier bridge, the formed higher voltage (such as 36-38V) is used for supplying power to higher-power equipment (such as an induced draft fan on a seeding machine), the formed lower voltage (such as 14-14.5V) is used for charging a storage battery and supplying power to other vehicle-mounted electrical equipment, and the higher voltage is used for supplying power to the high-power equipment, so that the current flowing through a generator coil is effectively reduced while the higher power can be provided, the manufacturing cost of the generator is reduced, the normal operation of the seeding fan is guaranteed, the beneficial effect is remarkable, and the agricultural machinery power supply system is suitable for application and popularization.
Description
Technical Field
The invention relates to an agricultural machinery power supply system, in particular to an agricultural machinery power supply system capable of automatically outputting double voltages.
Background
The generator is one of the important devices in agricultural machinery, and is used for converting mechanical energy into electric energy for meters, lighting lamps and other electric equipment in agricultural machinery. With the development of agricultural mechanization, each link of crop planting is developed towards automation, for example, a seeder is driven by agricultural machinery, and automatic seeding is realized by means of negative suction and pressure action of a fan. Relatively, the power of the fan is large, if the original generator on the agricultural machinery is used for 14V power supply, the current flowing through the generator and the power supply cable can be large, and the generator is not easy to manufacture.
For the existing generator on the agricultural machine, only one output end is usually provided, and the power is usually supplied for 14V by the instrument equipment on the agricultural machine, so that the air suction type seeding machine with 36V cannot be used on the existing agricultural machine. If an agricultural machinery power supply system is provided with double outputs of 36V and 14V, the technical problem is solved.
Disclosure of Invention
The invention provides an agricultural machinery power supply system for overcoming the defects of the technical problems.
The power supply system of the agricultural machinery comprises a generator and a voltage converter, wherein the generator converts mechanical energy of the agricultural machinery into electric energy and outputs the electric energy; the method is characterized in that: the generator outputs a first direct-current voltage, the first direct-current voltage is input to the larger power equipment and the voltage converter, the first direct-current voltage is reduced by the voltage converter to form a second direct-current voltage, and the second direct-current voltage is used for charging the storage battery and other vehicle-mounted electrical equipment.
Further, in the above agricultural machinery power supply system: the generator is internally provided with a rectifier bridge for converting three-phase electricity output by a generator coil into first direct-current voltage, the larger power equipment is fans, and the number of the fans is 1 or more than 1.
Further, in the above agricultural machinery power supply system: the first direct current voltage is 36-38V, and the second direct current voltage is 14-14.5V.
Further, in the above agricultural machinery power supply system: the voltage converter is a step-down DC/DC converter, and a working state change-over switch and an under-voltage protection circuit are arranged in the voltage converter; when the voltage of the input end of the voltage converter is lower than a set threshold value, the under-voltage protection circuit automatically turns off the output of the voltage converter so as to avoid overcurrent of a generator coil; the output of the voltage converter can be cut off by manually opening the working state change-over switch, and the automatic operation of the voltage converter can be realized by manually closing the working state change-over switch.
The power supply system of the agricultural machinery comprises a generator, a first rectifier bridge and a voltage converter, wherein the generator converts mechanical energy of the agricultural machinery into electric energy and outputs the electric energy; the method is characterized in that: the generator outputs a first direct-current voltage and a three-phase alternating-current voltage, and the first direct-current voltage is input to the voltage converter to form a second direct-current voltage which is used for charging the storage battery and other vehicle-mounted electrical equipment; after the three-phase alternating voltage is input to the first rectifier bridge, a third direct voltage is formed, and the third direct voltage is input to the larger power equipment.
Further, in the above agricultural machinery power supply system: the generator is internally provided with a second rectifier bridge for converting three-phase electricity output by a generator coil into a first direct-current voltage, the larger power equipment is fans, and the number of the fans is 1 or more than 1; the first direct current voltage and the third direct current voltage are 36-38V, and the second direct current voltage is 14-14.5V.
Further, in the above agricultural machinery power supply system: the voltage converter is a step-down DC/DC converter, and a working state change-over switch and an under-voltage protection circuit are arranged in the voltage converter; when the voltage of the input end of the voltage converter is lower than a set threshold value, the under-voltage protection circuit automatically turns off the output of the voltage converter so as to avoid overcurrent of a generator coil; the output of the voltage converter can be cut off by manually opening the working state change-over switch, and the automatic operation of the voltage converter can be realized by manually closing the working state change-over switch.
The power supply system of the agricultural machinery comprises a generator, a first rectifier bridge and a second rectifier bridge, wherein the generator converts mechanical energy of the agricultural machinery into electric energy and outputs the electric energy; the method is characterized in that: the generator outputs three-phase alternating voltage, and the three-phase alternating voltage respectively forms a first direct voltage and a second direct voltage after passing through a first rectifying bridge and a second rectifying bridge; the first direct current voltage is input to the larger power equipment, the second direct current voltage forms a third direct current voltage after passing through the voltage converter, and the third direct current voltage is used for charging a storage battery and other vehicle-mounted electrical equipment.
Further, in the above agricultural machinery power supply system: the high-power equipment is fans, and the number of the fans is 1 or more than 1; the first direct current voltage and the second direct current voltage are 36-38V, and the third direct current voltage is 14-14.5V.
Further, in the above agricultural machinery power supply system: the voltage converter is a step-down DC/DC converter, and a working state change-over switch and an under-voltage protection circuit are arranged in the voltage converter; when the voltage of the input end of the voltage converter is lower than a set threshold value, the under-voltage protection circuit automatically turns off the output of the voltage converter so as to avoid overcurrent of a generator coil; the output of the voltage converter can be cut off by manually opening the working state change-over switch, and the automatic operation of the voltage converter can be realized by manually closing the working state change-over switch.
The beneficial effects of the invention are as follows: according to the agricultural machinery power supply system, the direct-current voltage and/or alternating-current voltage output by the generator are processed by the voltage converter and/or the rectifier bridge, the formed higher voltage (such as 36-38V) is used for supplying power to higher-power equipment (such as an induced draft fan on a seeding machine), the formed lower voltage (such as 14-14.5V) is used for charging a storage battery and supplying power to other vehicle-mounted electrical equipment, and the higher voltage is used for supplying power to the high-power equipment, so that the current flowing through a generator coil is effectively reduced while the higher power can be provided, the manufacturing cost of the generator is reduced, the normal operation of the seeding fan is guaranteed, the beneficial effect is remarkable, and the agricultural machinery power supply system is suitable for application and popularization.
Drawings
FIG. 1 is a schematic diagram of an agricultural power supply system according to a first embodiment of the present invention;
FIG. 2 is a schematic diagram of a generator in a first embodiment;
FIG. 3 is a schematic diagram of an agricultural power supply system according to a second embodiment of the present invention;
FIG. 4 is a schematic diagram of a generator in a second embodiment;
fig. 5 is a schematic diagram of an agricultural machinery power supply system according to a third embodiment of the present invention.
In the figure: the power generation device comprises a generator 1, a voltage converter 2, a fan 3, a storage battery 4, other vehicle-mounted electrical equipment 5, a rectifier bridge 6, a first rectifier bridge 7 and a second rectifier bridge 8.
Detailed Description
The invention will be further described with reference to the drawings and examples.
In embodiment 1, as shown in fig. 1, a schematic diagram of an agricultural machinery power supply system of a first embodiment of the present invention is provided, which is composed of a generator 1 and a voltage converter 2, the agricultural machinery drives the generator 1 to operate through a transmission mechanism, the generator 1 outputs a first direct current voltage, and the first direct current voltage not only supplies power to a fan 3, but also is input to an input end of the voltage converter 2. After the first direct-current voltage is reduced by the voltage converter 2, a second direct-current voltage is formed, and the second direct-current voltage is used for charging the storage battery 4 and using electricity for other vehicle-mounted electrical equipment 5.
The first DC voltage is shown as 36-38V, preferably 36V; the second DC voltage is 14-14.5V, preferably 14V. Therefore, the power supply voltage (14V) of the original storage battery 4 of the agricultural machine and the power supply voltage (14V) of other vehicle-mounted electrical equipment 5 are unchanged, the power supply voltage of fans (the number of the fans is 1 or more than 1) is improved, the current flowing through the coils of the generator 1 is not too high, and the manufacturing cost of the generator is reduced.
As shown in fig. 2, a schematic diagram of the generator in the first embodiment is shown, and the three-phase ac power output by the generator 1 is rectified by the rectifier bridge 6 to output a first dc voltage of 36V.
In embodiment 2, as shown in fig. 3, the schematic diagram of the power supply system for an agricultural machine in the second embodiment of the present invention is composed of a generator 1, a first rectifier bridge 7 and a voltage converter 2, the agricultural machine drives the generator 1 to operate through a transmission mechanism, the generator 1 outputs a first direct voltage and a three-phase alternating voltage, the first direct voltage is input to the voltage converter 2 to form a second direct voltage, and the second direct voltage supplies power to the storage battery 4 and other vehicle-mounted electrical equipment 5. After the three-phase alternating voltage 7 is arranged by the first rectifier bridge 7, a third direct voltage is formed, and the third direct voltage supplies power to the fan.
The first direct current voltage and the third direct current voltage are 36-38V, preferably 36V; the second DC voltage is 14-14.5V. In this way, the fan with relatively high power is powered by the higher voltage (36-38V), and the storage battery 4 and other electrical equipment 5 on the vehicle are powered by the second direct-current voltage with the general voltage standard (14-14.5V), so that the current in the coil of the generator 1 is reduced.
As shown in fig. 4, a schematic diagram of the generator in the second embodiment is shown, and three-phase ac power of the generator is rectified by the second rectifier bridge 8 to form a first dc voltage output; while the three-phase alternating current of the generator is also fed into the first rectifier bridge 7.
Embodiment 3, as shown in fig. 5, provides a schematic diagram of an agricultural machinery power supply system according to a third embodiment of the present invention, which is composed of a generator 1, a first rectifier bridge 7, a second rectifier bridge 8 and a voltage converter 2, wherein no rectifier circuit is arranged in the generator 1, the generator 1 is driven to operate by a transmission mechanism, and the generator 1 only outputs three-phase alternating voltage. The three-phase alternating voltage forms a first direct voltage and a second direct voltage after passing through the first rectifying bridge 7 and the second rectifying bridge 8, the first direct voltage supplies power to the fan 3, and the second direct voltage is converted into a third direct voltage after being input into the voltage converter 2.
The first direct current voltage and the second direct current voltage are 36-38V, preferably 36V; the third direct current voltage is 14-14.5V, so that the fan with relatively high power is powered by using the higher voltage (36-38V), and the storage battery 4 and other on-board electrical equipment 5 are powered by using the second direct current voltage with the common voltage standard (14-14.5V), thereby being beneficial to reducing the current in the coil of the generator 1.
In embodiment 1, embodiment 2 and embodiment 3, the voltage converter 2 is a step-down DC/DC converter, and an operating state change-over switch and an under-voltage protection circuit are arranged in the voltage converter 2; when the voltage of the input end of the voltage converter is lower than a set threshold value (the threshold voltage can be set to 35V), the under-voltage protection circuit automatically turns off the output of the voltage converter so as to avoid overcurrent of a generator coil; the output of the voltage converter can be cut off by manually opening the working state change-over switch, and the automatic operation of the voltage converter can be realized by manually closing the working state change-over switch.
Claims (4)
1. An agricultural machinery power supply system comprises a generator (1) and a voltage converter (2), wherein the generator converts mechanical energy of an agricultural machinery into electric energy and outputs the electric energy; the method is characterized in that: the generator outputs a first direct-current voltage, the first direct-current voltage is input to the larger power equipment and the voltage converter (2), the first direct-current voltage is reduced by the voltage converter to form a second direct-current voltage, and the second direct-current voltage is used for charging the storage battery (4) and other vehicle-mounted electrical equipment (5);
the first direct current voltage is 36-38V, and the second direct current voltage is 14-14.5V;
the voltage converter (2) is a step-down DC/DC converter, and a working state change-over switch and an under-voltage protection circuit are arranged in the voltage converter; when the voltage of the input end of the voltage converter is lower than a set threshold value, the under-voltage protection circuit automatically turns off the output of the voltage converter so as to avoid overcurrent of a generator coil; the output of the voltage converter can be cut off by manually opening the working state change-over switch, and the automatic operation of the voltage converter can be realized by manually closing the working state change-over switch.
2. The agricultural power supply system of claim 1, wherein: the power generator is characterized in that a rectifier bridge (6) for converting three-phase electricity output by a generator coil into first direct-current voltage is arranged in the power generator (1), the fans (3) are used as high-power equipment, and the number of the fans is 1 or more.
3. An agricultural machinery power supply system comprises a generator (1), a first rectifier bridge (7) and a voltage converter (2), wherein the generator converts mechanical energy of an agricultural machinery into electric energy and outputs the electric energy; the method is characterized in that: the generator outputs a first direct-current voltage and a three-phase alternating-current voltage, the first direct-current voltage is input to the voltage converter (2) to form a second direct-current voltage, and the second direct-current voltage is used for charging the storage battery (4) and other vehicle-mounted electrical equipment (5); after the three-phase alternating voltage is input to the first rectifier bridge (7), a third direct voltage is formed, and the third direct voltage is input to higher-power equipment;
a second rectifier bridge (8) for converting three-phase electricity output by a generator coil into a first direct-current voltage is arranged in the generator (1), the larger power equipment is fans (3), and the number of the fans is 1 or more than 1; the first direct current voltage and the third direct current voltage are 36-38V, and the second direct current voltage is 14-14.5V;
the voltage converter (2) is a step-down DC/DC converter, and a working state change-over switch and an under-voltage protection circuit are arranged in the voltage converter; when the voltage of the input end of the voltage converter is lower than a set threshold value, the under-voltage protection circuit automatically turns off the output of the voltage converter so as to avoid overcurrent of a generator coil; the output of the voltage converter can be cut off by manually opening the working state change-over switch, and the automatic operation of the voltage converter can be realized by manually closing the working state change-over switch.
4. An agricultural machinery power supply system comprises a generator (1), a first rectifier bridge (7) and a second rectifier bridge (8), wherein the generator converts mechanical energy of the agricultural machinery into electric energy and outputs the electric energy; the method is characterized in that: the generator outputs three-phase alternating voltage, and the three-phase alternating voltage respectively forms a first direct voltage and a second direct voltage after passing through a first trimming bridge (7) and a second rectifying bridge (8); the first direct-current voltage is input to the larger power equipment, the second direct-current voltage forms a third direct-current voltage after passing through the voltage converter (2), and the third direct-current voltage is used for charging the storage battery (4) and other vehicle-mounted electrical equipment (5);
the high-power equipment is a fan (3), and the number of the fans is 1 or more than 1; the first direct current voltage and the second direct current voltage are 36-38V, and the third direct current voltage is 14-14.5V;
the voltage converter (2) is a step-down DC/DC converter, and a working state change-over switch and an under-voltage protection circuit are arranged in the voltage converter; when the voltage of the input end of the voltage converter is lower than a set threshold value, the under-voltage protection circuit automatically turns off the output of the voltage converter so as to avoid overcurrent of a generator coil; the output of the voltage converter can be cut off by manually opening the working state change-over switch, and the automatic operation of the voltage converter can be realized by manually closing the working state change-over switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710024491.7A CN106786593B (en) | 2017-01-13 | 2017-01-13 | Agricultural machinery power supply system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710024491.7A CN106786593B (en) | 2017-01-13 | 2017-01-13 | Agricultural machinery power supply system |
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| Publication Number | Publication Date |
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| CN106786593A CN106786593A (en) | 2017-05-31 |
| CN106786593B true CN106786593B (en) | 2023-08-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710024491.7A Active CN106786593B (en) | 2017-01-13 | 2017-01-13 | Agricultural machinery power supply system |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107846134A (en) * | 2017-12-05 | 2018-03-27 | 湖北巴东博宇工贸有限公司 | High-effect single-chip microcomputer dual output electric car DC converters |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07203636A (en) * | 1993-12-29 | 1995-08-04 | Mazda Motor Corp | Engine generator |
| JP2001211563A (en) * | 2000-01-26 | 2001-08-03 | Auto Network Gijutsu Kenkyusho:Kk | Power-feeding method and device for vehicle |
| CN102549876A (en) * | 2009-10-16 | 2012-07-04 | 三菱电机株式会社 | Power supply system for vehicle |
| CN102647138A (en) * | 2012-04-20 | 2012-08-22 | 中国海洋石油总公司 | Rectifying voltage-stabilizing power supply device for underground turbine generator |
| CN103066684A (en) * | 2013-01-06 | 2013-04-24 | 浙江中碳科技有限公司 | High voltage direct current power supply system |
| CN203086179U (en) * | 2012-12-25 | 2013-07-24 | 比亚迪股份有限公司 | Double-voltage DC supply system |
-
2017
- 2017-01-13 CN CN201710024491.7A patent/CN106786593B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07203636A (en) * | 1993-12-29 | 1995-08-04 | Mazda Motor Corp | Engine generator |
| JP2001211563A (en) * | 2000-01-26 | 2001-08-03 | Auto Network Gijutsu Kenkyusho:Kk | Power-feeding method and device for vehicle |
| CN102549876A (en) * | 2009-10-16 | 2012-07-04 | 三菱电机株式会社 | Power supply system for vehicle |
| CN102647138A (en) * | 2012-04-20 | 2012-08-22 | 中国海洋石油总公司 | Rectifying voltage-stabilizing power supply device for underground turbine generator |
| CN203086179U (en) * | 2012-12-25 | 2013-07-24 | 比亚迪股份有限公司 | Double-voltage DC supply system |
| CN103066684A (en) * | 2013-01-06 | 2013-04-24 | 浙江中碳科技有限公司 | High voltage direct current power supply system |
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| CN106786593A (en) | 2017-05-31 |
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