CN112467713A - Low-voltage direct-current starting power supply configuration - Google Patents
Low-voltage direct-current starting power supply configuration Download PDFInfo
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- CN112467713A CN112467713A CN202011213183.7A CN202011213183A CN112467713A CN 112467713 A CN112467713 A CN 112467713A CN 202011213183 A CN202011213183 A CN 202011213183A CN 112467713 A CN112467713 A CN 112467713A
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- power supply
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- starting
- voltage direct
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- 238000006243 chemical reaction Methods 0.000 claims description 27
- 238000009825 accumulation Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Classifications
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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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
- F02N11/00—Starting of engines by means of electric motors
- F02N11/08—Circuits or control means specially adapted for starting of engines
- F02N11/0862—Circuits or control means specially adapted for starting of engines characterised by the electrical power supply means, e.g. battery
-
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/06—Two-wire systems
-
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/08—Three-wire systems; Systems having more than three wires
- H02J1/082—Plural DC voltage, e.g. DC supply voltage with at least two different DC voltage levels
-
- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
- H02J1/10—Parallel operation of dc sources
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Direct Current Feeding And Distribution (AREA)
Abstract
The invention discloses a low-voltage direct-current starting power supply configuration, which divides an onboard bus bar into a low-voltage direct-current power supply bus bar and a serial starting bus bar; when starting, the low-voltage direct-current power supply is connected in series by controlling the switching contactor, and the voltage after the series connection is applied to the serial starting bus bar and used for providing a starting power supply for the engine, so that the starting voltage is improved, and the starting current is reduced; when power is supplied, the low-voltage direct-current power supplies are connected in parallel by controlling the switching contactor, and the voltage after the parallel connection is applied to the low-voltage direct-current power supply bus bar to provide a normal working power supply for the airborne low-voltage direct-current power equipment, so that the original low-voltage direct-current power supply system is also maintained, and the low-voltage direct-current power supply system is an advanced low-voltage direct-current starting power supply configuration.
Description
Technical Field
The invention belongs to the field of power supply of a low-voltage direct-current power supply system and engine starting, and particularly relates to a low-voltage direct-current starting power supply configuration.
Background
At present, in the domestic helicopters adopting a low-voltage direct-current power supply system and a direct-current engine starting mode, power supplies for starting an engine are all single power supplies or a plurality of power supplies are connected in parallel, such as a single external power supply, a single storage battery or 1 storage battery and 1 generator are connected in parallel, namely, the power supply voltage for starting the engine is about 28V low-voltage direct current, the voltage for supplying power to airborne equipment is also about 28V low-voltage direct current, and the starting power supply configuration has the advantages of simplicity and easiness in implementation.
However, as engine technology develops, the requirement for starting torque is higher and higher, and the larger starting torque also exposes the problems of the existing low-voltage direct-current starting power supply configuration, namely that the starting voltage is too low and the starting current is too large. On one hand, the weight of the system is increased due to the selection of a lead wire with a larger wire gauge, and on the other hand, the starting failure is caused due to the fact that part of the low-voltage direct-current power supply cannot meet the instantaneous discharge capacity during starting.
Disclosure of Invention
The invention provides a novel low-voltage direct-current starting power supply configuration, which is used for solving the problem that the starting fails due to the fact that the existing low-voltage direct-current power supply system cannot meet the requirement of instantaneous discharge capacity during starting.
In order to realize the task, the invention adopts the following technical scheme:
a low voltage dc starting power supply configuration comprising a low voltage dc supply bus, a series starting bus, a low voltage dc power supply and a transfer contactor, wherein:
the low-voltage DC power supply bus bar is configured to provide normal working power for an onboard low-voltage DC consumer, and the series starting bus bar is configured to provide starting power for an engine; the low-voltage direct-current power supply comprises a first low-voltage direct-current power supply and a second low-voltage direct-current power supply, wherein the positive end of the first low-voltage direct-current power supply is connected to the low-voltage direct-current power supply bus bar, and the negative end of the first low-voltage direct-current power supply is connected to the machine body ground; the connection mode of the positive terminal and the negative terminal of the second low-voltage direct-current power supply is controlled by the conversion contactor;
when starting, the first low-voltage direct-current power supply and the second low-voltage direct-current power supply are connected in series by controlling the switching contactor, and the voltage after series connection is applied to the serial starting bus bar and used for providing a starting power supply for the engine; and when power is supplied, the first low-voltage direct-current power supply and the second low-voltage direct-current power supply are connected in parallel by controlling the switching contactor, and the voltage after parallel connection is applied to the low-voltage direct-current power supply bus bar and is used for providing a normal working power supply for the airborne low-voltage direct-current power equipment.
Furthermore, the serial starting bus bar, the conversion contactor and the second low-voltage direct-current power supply correspond to each other one by one, and the number of the serial starting bus bar and the number of the conversion contactor are more than one.
Further, when the serial starting bus bar, the conversion contactor and the second low-voltage direct-current power supply are all provided with one, the positive end and the negative end of the second low-voltage direct-current power supply are respectively connected with the first switching end and the second switching end of the conversion contactor; a first starting contact of the conversion contactor is connected with a series starting bus bar, and a first power supply contact is connected with a low-voltage direct-current power supply bus bar; and a second starting contact of the conversion contactor is connected with the low-voltage direct current power supply bus bar, and a second power supply contact is connected with the machine body ground.
Furthermore, the first switching end is used for being matched with the first starting contact or the first power supply contact, the second switching end is used for being matched with the second starting contact or the second power supply contact, and the first switching end and the second switching end are synchronously actuated.
Further, when the first switching end is matched with the first starting contact and the second switching end is matched with the second starting contact, the first low-voltage direct-current power supply and the second low-voltage direct-current power supply are connected in series, and the voltage of the serial starting bus bar is the sum of the voltages of the first low-voltage direct-current power supply and the second low-voltage direct-current power supply;
when the first switching end is matched with the first power supply contact and the second switching end is matched with the second power supply contact, the first low-voltage direct-current power supply and the second low-voltage direct-current power supply are connected in parallel.
Further, when the series starting bus bar, the conversion contactor and the second low-voltage direct-current power supply are all provided with two:
in a second group of series starting bus bars, a transfer contactor and a second low voltage DC power supply, a second starting contact of the transfer contactor is connected with the series starting bus bars in the first group, and a first starting contact is connected with the series starting bus bars in the group.
Further, when the serial starting bus bar, the switching contactor and the second low-voltage direct-current power supply are all provided with more than two, the connection mode of the serial starting bus bar, the switching contactor and the second low-voltage direct-current power supply after the third group is the same as that of the second group.
Further, the low-voltage direct-current starting power supply configuration is applied to a low-voltage direct-current power supply system.
Compared with the prior art, the invention has the following technical characteristics:
by utilizing the low-voltage direct-current starting power supply configuration, the low-voltage direct-current power supply is connected in series by controlling the switching contactor during starting, and the voltage after series connection is applied to the serial starting bus bar and used for providing a starting power supply for an engine, so that the starting voltage is improved, and the starting current is reduced; when power is supplied, the low-voltage direct-current power supplies are connected in parallel by controlling the switching contactor, and the voltage after the parallel connection is applied to the low-voltage direct-current power supply bus bar to provide a normal working power supply for the airborne low-voltage direct-current power equipment, so that the original low-voltage direct-current power supply system is also maintained, and the low-voltage direct-current power supply system is an advanced low-voltage direct-current starting power supply configuration.
Drawings
Fig. 1 is a schematic diagram of the power supply configuration of the present invention.
Detailed Description
The invention provides a low-voltage direct-current starting power supply configuration, which comprises: the low-voltage direct-current power supply system comprises a low-voltage direct-current power supply bus bar, a series starting bus bar, a low-voltage direct-current power supply and a conversion contactor.
The low-voltage direct-current power supply bus bar is configured to provide normal working power for the airborne low-voltage direct-current electric equipment. The series starting bus bar is configured to provide starting power to an engine. The low-voltage direct-current power supply comprises a first low-voltage direct-current power supply and a second low-voltage direct-current power supply, wherein the positive end of the first low-voltage direct-current power supply is connected to the low-voltage direct-current power supply bus bar, and the negative end of the first low-voltage direct-current power supply is connected to the machine body ground; the connection mode of the positive terminal and the negative terminal of the second low-voltage direct-current power supply is controlled by the conversion contactor.
When starting, the first low-voltage direct-current power supply and the second low-voltage direct-current power supply are connected in series by controlling the switching contactor, and the voltage after series connection is applied to the serial starting bus bar and used for providing a starting power supply for the engine; and when power is supplied, the first low-voltage direct-current power supply and the second low-voltage direct-current power supply are connected in parallel by controlling the switching contactor, and the voltage after parallel connection is applied to the low-voltage direct-current power supply bus bar and is used for providing a normal working power supply for the airborne low-voltage direct-current power equipment.
Referring to fig. 1, the serial starting bus bar, the switching contactor and the second low-voltage dc power supply correspond to each other one by one, and the number of the serial starting bus bar and the switching contactor is more than one. When the serial starting bus bar, the conversion contactor and the second low-voltage direct-current power supply are all provided with one, the serial starting bus bar, the conversion contactor and the second low-voltage direct-current power supply are marked as a group, and the connection mode in the group is as follows:
the positive end and the negative end of the second low-voltage direct-current power supply 1 are respectively connected with the first switching end and the second switching end of the conversion contactor 1; a first starting contact of the conversion contactor 1 is connected with a series starting bus bar 1, and a first power supply contact is connected with a low-voltage direct-current power supply bus bar; the second starting contact of the transfer contactor 1 is connected with the low-voltage direct current supply bus bar, and the second power supply contact is connected with the machine body ground. The first switching end is used for being matched with the first starting contact or the first power supply contact, the second switching end is used for being matched with the second starting contact or the second power supply contact, and the first switching end and the second switching end are synchronously actuated.
When the first switching end is matched with the first starting contact and the second switching end is matched with the second starting contact, the starting gear is started, the first low-voltage direct-current power supply and the second low-voltage direct-current power supply are connected in series, the positive end of the second low-voltage direct-current power supply is connected with a series starting bus bar, the negative end of the second low-voltage direct-current power supply is connected with a low-voltage direct-current power supply bus bar, and the voltage of the series starting bus bar is the sum of the voltages of the first low-voltage direct-current power supply and the second low-voltage direct;
when the first switching end is matched with the first power supply contact, the second switching end is matched with the second power supply contact, the power supply gear is started, the first low-voltage direct-current power supply and the second low-voltage direct-current power supply are connected in parallel, the negative end of the second low-voltage direct-current power supply is connected with the machine body ground, the positive end of the second low-voltage direct-current power supply is connected with the low-voltage direct-current power supply bus bar, and the low-voltage direct-current power supply bus bar is used for providing a normal working power supply for the airborne.
Referring to fig. 1, when the series starting bus bar, the switching contactor, and the second low voltage dc power supply are all provided in two:
in the second group of serial starting bus bars, the conversion contactor and the second low-voltage direct-current power supply, a second starting contact of the conversion contactor is connected with the serial starting bus bars in the first group, and a first starting contact is connected with the serial starting bus bars in the group, so that when all the conversion contactors are switched to a starting gear simultaneously, the second low-voltage direct-current power supply in the group forms a serial configuration with the second low-voltage direct-current power supply and the first low-voltage direct-current power supply in the first group in sequence to meet the requirement of serial starting.
In the example shown in fig. 1, the second low-voltage dc power supply 2, which is one of the components when starting with 3 low-voltage dc power supplies connected in series, has its positive and negative power supply connections controlled by the switching contactor 2 of the group, and when the switching contactor 2 is operated to the power supply position, the positive terminal of the second low-voltage dc power supply 2 is connected to the low-voltage dc power supply bus bar, and the negative terminal is connected to the machine body ground; when the switching contactor 2 acts to start the electric gear, the positive end of the second low-voltage direct-current power supply 3 is connected to the serial starting bus bar 2, and the negative end is connected to the serial starting bus bar 1 in the second group; thus, a starting voltage of the first low-voltage dc power supply 1 plus the voltage of the second low-voltage dc power supply 2 is formed on the series starting bus bar 2 of the present group. Such accumulation may continue as desired.
When the serial starting bus bar, the conversion contactor and the second low-voltage direct-current power supply are arranged more than two, the connection mode of the serial starting bus bar, the conversion contactor and the second low-voltage direct-current power supply after the third group is the same as that of the second group. The group numbers gradually increase in a direction away from the low-voltage DC power supply bus bar.
The converting contactor 1 and the converting contactor 2 are controlled by an external logic control circuit to act on contacts thereof, so that synchronous conversion is realized. The low-voltage direct-current power supply in the scheme refers to a storage battery, an external power supply, a direct-current generator, a voltage transformation rectifier and the like, the number of the low-voltage direct-current power supply is 2 or more, the low-voltage direct-current power supply conforms to a low-voltage direct-current power supply system, and the voltage is 28V. The current-carrying capacity of the low-voltage direct-current power supply bus bar meets the load requirement of the on-board equipment on the bus bar; the current-carrying capacity of the serial starting bus bar meets the starting current requirement; the conversion contactor at least has two pairs of contacts, and the power parameter satisfies the start and power supply demand.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equally replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application, and are intended to be included within the scope of the present application.
Claims (8)
1. A low voltage DC starting power supply configuration, characterized by, includes low voltage DC power supply busbar, series connection starting busbar, low voltage DC power supply and conversion contactor, wherein:
the low-voltage DC power supply bus bar is configured to provide normal working power for an onboard low-voltage DC consumer, and the series starting bus bar is configured to provide starting power for an engine; the low-voltage direct-current power supply comprises a first low-voltage direct-current power supply and a second low-voltage direct-current power supply, wherein the positive end of the first low-voltage direct-current power supply is connected to the low-voltage direct-current power supply bus bar, and the negative end of the first low-voltage direct-current power supply is connected to the machine body ground; the connection mode of the positive terminal and the negative terminal of the second low-voltage direct-current power supply is controlled by the conversion contactor;
when starting, the first low-voltage direct-current power supply and the second low-voltage direct-current power supply are connected in series by controlling the switching contactor, and the voltage after series connection is applied to the serial starting bus bar and used for providing a starting power supply for the engine; and when power is supplied, the first low-voltage direct-current power supply and the second low-voltage direct-current power supply are connected in parallel by controlling the switching contactor, and the voltage after parallel connection is applied to the low-voltage direct-current power supply bus bar and is used for providing a normal working power supply for the airborne low-voltage direct-current power equipment.
2. The low-voltage direct-current starting power supply configuration as claimed in claim 1, wherein the serial starting bus bar, the conversion contactor and the second low-voltage direct-current power supply are in one-to-one correspondence, and the number of the serial starting bus bar and the conversion contactor is more than one.
3. The low-voltage direct-current start power supply configuration as claimed in claim 1, wherein when one of the series start bus bar, the switching contactor and the second low-voltage direct-current power supply is provided, the positive terminal and the negative terminal of the second low-voltage direct-current power supply are respectively connected with the first switching terminal and the second switching terminal of the switching contactor; a first starting contact of the conversion contactor is connected with a series starting bus bar, and a first power supply contact is connected with a low-voltage direct-current power supply bus bar; and a second starting contact of the conversion contactor is connected with the low-voltage direct current power supply bus bar, and a second power supply contact is connected with the machine body ground.
4. The low voltage dc starting power supply configuration according to claim 1, wherein the first switching terminal is adapted to cooperate with a first starting contact or a first power supply contact, the second switching terminal is adapted to cooperate with a second starting contact or a second power supply contact, and the first switching terminal and the second switching terminal are synchronously actuated.
5. The low voltage dc starting power supply configuration according to claim 1, wherein when the first switching terminal is mated with the first starting contact and the second switching terminal is mated with the second starting contact, the first low voltage dc power source and the second low voltage dc power source are connected in series, and the voltage of the serial starting bus bar is the sum of the voltages of the first low voltage dc power source and the second low voltage dc power source;
when the first switching end is matched with the first power supply contact and the second switching end is matched with the second power supply contact, the first low-voltage direct-current power supply and the second low-voltage direct-current power supply are connected in parallel.
6. The low-voltage direct-current start power supply configuration according to claim 1, wherein when two of the series start bus bar, the transfer contactor and the second low-voltage direct-current power supply are provided:
in a second group of series starting bus bars, a transfer contactor and a second low voltage DC power supply, a second starting contact of the transfer contactor is connected with the series starting bus bars in the first group, and a first starting contact is connected with the series starting bus bars in the group.
7. The low-voltage direct-current starting power supply configuration according to claim 1, wherein when the number of the series starting bus bar, the switching contactor and the second low-voltage direct-current power supply is two or more, the series starting bus bar, the switching contactor and the second low-voltage direct-current power supply after the third group are connected in the same manner as the second group.
8. The low voltage dc starting power supply configuration according to claim 1, wherein the low voltage dc starting power supply configuration is applied in a low voltage dc power supply system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011213183.7A CN112467713A (en) | 2020-11-03 | 2020-11-03 | Low-voltage direct-current starting power supply configuration |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011213183.7A CN112467713A (en) | 2020-11-03 | 2020-11-03 | Low-voltage direct-current starting power supply configuration |
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| Publication Number | Publication Date |
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| CN112467713A true CN112467713A (en) | 2021-03-09 |
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| CN202011213183.7A Pending CN112467713A (en) | 2020-11-03 | 2020-11-03 | Low-voltage direct-current starting power supply configuration |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1245452A1 (en) * | 2001-03-30 | 2002-10-02 | Siemens Aktiengesellschaft | Vehicle on-board network, particularly for a truck |
| CN202353300U (en) * | 2011-10-28 | 2012-07-25 | 株洲南方燃气轮机成套制造安装有限公司 | Power supply device |
| CN109149552A (en) * | 2018-09-25 | 2019-01-04 | 南京麦格安倍电气科技有限公司 | A kind of aircraft battery plays the pressure limiting device in motor-car |
| CN208820536U (en) * | 2018-10-09 | 2019-05-03 | 马鹏 | Double power-supply automatic transferring device |
-
2020
- 2020-11-03 CN CN202011213183.7A patent/CN112467713A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1245452A1 (en) * | 2001-03-30 | 2002-10-02 | Siemens Aktiengesellschaft | Vehicle on-board network, particularly for a truck |
| CN202353300U (en) * | 2011-10-28 | 2012-07-25 | 株洲南方燃气轮机成套制造安装有限公司 | Power supply device |
| CN109149552A (en) * | 2018-09-25 | 2019-01-04 | 南京麦格安倍电气科技有限公司 | A kind of aircraft battery plays the pressure limiting device in motor-car |
| CN208820536U (en) * | 2018-10-09 | 2019-05-03 | 马鹏 | Double power-supply automatic transferring device |
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Application publication date: 20210309 |