CN201694383U - Electric power propulsion system - Google Patents
Electric power propulsion system Download PDFInfo
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- CN201694383U CN201694383U CN2010203004406U CN201020300440U CN201694383U CN 201694383 U CN201694383 U CN 201694383U CN 2010203004406 U CN2010203004406 U CN 2010203004406U CN 201020300440 U CN201020300440 U CN 201020300440U CN 201694383 U CN201694383 U CN 201694383U
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- motor
- main motor
- propulsion system
- electric propulsion
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Abstract
The utility model discloses an electric power propulsion system comprising an internal combustion engine, a generator, a distribution system, a propulsion motor and a propeller, wherein the generator is connected to the propulsion motor through the distribution system, the propulsion motor is connected to the propeller through a clutch and a decelerator; wherein the propeller is a propeller with adjustable pitch; wherein the generator and the propulsion motor are synchronous motors; the novel electric power propulsion system also contains an assisting asynchronous motor and an assisting control apparatus for controlling the assisting asynchronous motor, the assisting asynchronous motor being connected to the propulsion motor, the capacity of the assisting asynchronous motor being 4%-6% that of the propulsion motor. The utility model can effectively solves problems of prior art electric power propulsion system due to the adoption of frequency conversion technology, such as high investment, difficult maintenance, and high failure risk. The utility model has the advantages of little investment, convenient installation and maintenance, low failure risk and obvious economic benefit.
Description
Technical field
The utility model relates to a kind of propulsion system, especially a kind of electric propulsion system that is used for various ships or other waterborne moveable structure.
Background technology
Traditional angle of rake boats and ships of internal combustion engine drive spacing oar or other waterborne moveable structure, its route speed will be realized by regulating internal-combustion engine rotational speed, and the nitrogen oxide emission of combustion engine, the variable-speed operation operating mode is more much higher than constant-speed operation operating mode, and its exhaust emission exceeds standard usually.Under the overall situation of energy-saving and emission-reduction, electric propulsion system arises at the historic moment, and the characteristics of electric propulsion system are: good economy performance, save fuel oil; The road-holding property of boats and ships and safety are good.Electric propulsion system uses many combustion engines, the unlikely power that completely loses when indivedual unit et out of order; Save the space, improved engine room arrangement; Noise is low, adopt electric propulsion after, main soruce of vibration Zhao engine installation with the constant rotational speed operation, does not have direct connection with axle system and hull yet on elastic base, significantly reduced vibration and noise, helps the boats and ships pollution that controls environment.
Electric propulsion system has multiple scheme, for example:
1. silicon controlled rectifier+DC motor
DC machine needs commutator, easy et out of order, and have complex structure, cost height, shortcoming such as volume is big, difficult in maintenance, efficient is low; Because adopted device for high-power power electronic, network of ship is produced bigger harmonic pollution, hinder it and advanced the widespread use in field at marine vessel power.
2. AC asynchronous motor+adjustable oar
AC asynchronous motor starting immediate current is bigger, normally 5～7 of normal current times, causes system's pressure drop of grid big; The torque that starting moment mechanical axis bears is big, is about 2～3 times of torque rating; In addition, power factor is lower, also can only reach about 0.85 in the time of at full capacity; Counter-rotating is slow, and stopping distance is long.
3. current-mode converter+autosynchronous motor
During low cruise, current-mode converter is with near current control pulsation zero, and also there is pulsation in torque output, vibrates for the axle frenulum; Time constant big (because the load of direct current (DC) sympathism links to each other) is so the system dynamics response is relatively poor; Direct current input inductance numerical value in the current-mode inverter circuit is very big can to constitute a current source, make the DC loop current constant, so the weight of inductance, volume are all very big, and, make to be very restricted in the use to the bigger harmonic pollution of network of ship generation.
4. ac-ac frequency converter+ac synchronous motor (CYCLO)
Network of ship is produced bigger harmonic pollution, and harmonic wave just depends on motor speed; Power factor is low, and the system power factor is determined by electric moter voltage, is generally about 0.76.
5. voltage frequency converter+AC asynchronous motor
Belong to friendship Carve Xi ac frequency converter with current-mode converter, also form, so efficient is low by rectifier, filter, inverter three parts; In addition, high-voltage large-capacity IGBT and IGCT cost height.
The scheme of the employing converter technique of generally using will install additional devices such as phase shifting transformer, filter additional now, and it is big that electric energy loss becomes, and harmonic pollution is big, and cost of investment is increased.What is more important, in case frequency converter fault, needing very, the technical professional could keep in repair, this has proposed very high requirement to the crewman, even be equipped with relevant professional and technical personnel on the ship, the parts that damage also are difficult on the ship away from land and solve, and have therefore increased especially sea going risk waterborne greatly.Open day be that the Chinese patent file that July 16, notification number in 2008 are CN101219644 discloses a kind of watercraft electric propulsion system based on super capacitance hybrid power, comprise: hybrid power supply, super capacitor group and battery pile, charge system, comprise ground charging station rectification actuating device, intelligent self-adaptive control setup, be used to finish charging to the super capacitor group, the driver behavior control system, comprise driving controller, velocity setting device and telltale, to realize monitoring to ship operation and operation conditions; Propulsion system comprises the frequency converter actuating device, alternating-current motor/AC motor and the propelling unit that link to each other successively; Control system comprises pile control setup and system controller, adopts the fieldbus mode that driver behavior control system and field control system are coordinated.Super capacitor in this structure is fast with respect to its charging rate of storage battery, can finish at short notice, and have and do not have discharging, and is pollution-free, is beneficial to environmental protection, and it is little to have noise simultaneously, can improve cabin comfort level in the boats and ships.This structure adopts based on super capacitance hybrid power in addition, is convenient to configuration, easily layout.Open day be that the Chinese patent file that January 9, notification number in 2008 are CN201002715 discloses the automotive gas turbine stirling engine electric propulsion apparatus that a kind of large ship navigates by water at a high speed, comprise: two stage compressor, intercooler, regenerator, combustion chamber, two-stage gas turbine, A stirling engine, B stirling engine, water-circulating pump, radiator, fan, main generator, A electrical generator, B electrical generator, electrical panel, voltage transformer, harmonic filter, frequency converter, monitor controller, electric propulsion device.This structure adopts from the waste gas of the automotive gas turbine thermal source as stirling engine, when not increasing consumption of fuel, not increase-volume of turbo-power unit, stirling engine work fully, not need not under the condition of fuel feeding, increase substantially turbo-power unit combined power thermal efficiency of cycle and large ship propulsive force, can significantly improve the manoevreability and the emergency capability of the marine defence of waterborne emergent operational capability and the country large ship of large-sized civil boats and ships, have apparent economic benefit and social benefit.But above-mentioned patent all adopts the converter technique speed governing in electric propulsion system, the cost of investment height, and electric energy loss and harmonic pollution are big, and be difficult in maintenance, and the failure risk of its power plant of boats and ships maritime navigation is bigger.
The utility model content
The utility model causes the cost of investment height for the electric propulsion system that solves prior art because of adopting converter technique, electric energy loss and harmonic pollution are big, difficult in maintenance, the bigger problem of failure risk of its power plant of boats and ships maritime navigation and provide a kind of less investment, convenient for installation and maintenance, over-the-road expense is low, system reliability is high, the low electric propulsion system of failure risk in the use.
Another purpose of the present utility model is for the electric propulsion system starting immediate current that solves prior art is big, causes the big problem of torque that system's pressure drop of grid is big and starting moment mechanical axis bears and non-impact current when a kind of the startup is provided, electric propulsion system that the mechanical bearing torque suspension is little.
The utility model is to reach the concrete technical scheme that above-mentioned technical purpose adopts to be: a kind of electric propulsion system, comprise combustion engine, electrical generator, switching arrangement, main motor and propelling unit, described electrical generator is by switching arrangement and main motor cable connection, main motor connects propelling unit by power-transfer clutch and speed reduction gearing, described propelling unit is an adjustable pitch propeller, described electrical generator and main motor are synchronous dynamo, described novel electric propulsion system also comprises the Auxiliary Control Device of auxiliary asynchronous motor and the auxiliary asynchronous motor of control, auxiliary asynchronous motor connects main motor, and the capacity of auxiliary asynchronous motor is 4% to 16% of a main motor.Constructional feature of the present utility model mainly is not have large-capacity transducer and additional equipment thereof between main motor and the propelling unit, electrical generator and main motor all adopt synchronous dynamo, in addition, the speed control of boats and ships is finished by adjustable pitch propeller, because ICE-powered is an electrical generator, so internal combustion engine is at constant speed mode, combustion in IC engine is abundant like this, the efficient height is saved fuel oil, can realize combustion with minimal.Adopt adjustable pitch propeller, realize the switching that boats and ships move forward and backward, as long as the pitch of adjustable screw oar is smoothly more stable, quick than the rotating of combustion engine ahead and astern and main motor.The utility model has adopted speed reduction gearing and the such mechanical equipment of adjustable pitch propeller, advantage is that their technology are all very ripe, the reliability height, the operation of electric remote control and local manual-operated emergent is all arranged, when the electric remote control fault, can be at local M/C, in case and machinery break down, search easy to maintenancely, change spare part and get final product.If the adjustable pitch propeller fault, and can't repair, the utility model can also lock pitch with adjustable pitch propeller, uses as the spacing oar.Like this, the electric propulsion system that has solved prior art causes the cost of investment height because of adopting converter technique, electric energy loss and harmonic pollution are big, difficult in maintenance, the bigger problem of failure risk of its power plant of boats and ships maritime navigation, avoided using equipment such as voltage transformer, frequency converter between the electrical generator of prior art electric propulsion system and the main motor, in case and these electric equipment faults, its troubleshooting and maintenance be difficulty also, needs realistic problem such as very professional electrical technology personnel could solve.In addition, speed reduction gearing described in the utility model connects propelling unit, and its speed reduction gearing and propelling unit can be the branch body structures, also can adopt the propelling unit that self has speed reduction gearing.Because main motor of the present utility model is a synchronous dynamo, can not full voltage starting, and the utility model is provided with the Auxiliary Control Device of auxiliary asynchronous motor and the auxiliary asynchronous motor of control, and auxiliary asynchronous motor connects main motor, we can be by starting auxiliary asynchronous motor earlier, drive main motor, thereby main motor is started smoothly.In addition, auxiliary asynchronous motor of the present utility model and main motor can be incorporate structures, also can be independent structures separately.
As preferably, Auxiliary Control Device comprises frequency converter or soft starter or star-delta starter or autostarter.Auxiliary Control Device and auxiliary asynchronous motor just help main motor to incorporate system's electrical network into, and capacity is little, have only 4% to 16% of main motor capacity, and work-hours is very short, so service life is very long.And can overlap supplementary controlled system by several main motors time sharing shared, so more the space is saved in the cost-saving.Frequency converter described here is meant the low capacity converter plant suitable with auxiliary asynchronous motor.
During the electric propulsion system starting, with the throw-out-of clutch between main motor and the speed reduction gearing, by the auxiliary asynchronous motor of Auxiliary Control Device starting, auxiliary asynchronous motor drives the main motor slow start, accelerate to rated speed of rotation then, incorporate main motor into the system electrical network by the automatic synchronizing device of switching arrangement again, cut off auxiliary asynchronous motor simultaneously.When system starts working, generator operation, system's electrical network is ready, drop into main motor, because of main motor is a synchronous dynamo, can not full voltage starting, therefore, earlier main motor and speed reduction gearing are thrown off, be defined as unloaded back (encourage the formula synchronous dynamo for electricity, turn-off excitation), by the auxiliary asynchronous motor of Auxiliary Control Device starting, auxiliary asynchronous motor band the main motor slow start, and follow procedure accelerates to rated speed of rotation (encourage the formula synchronous dynamo for electricity, again main motor is carried out excitation) then, at this moment, main motor is operated in generating state, by automatic synchronizing device it is connected to the grid again, after being incorporated into the power networks, cut away auxiliary asynchronous motor immediately, main motor just under zero load, switches to the electrical motor mode of operation by the electrical generator state like this, has realized the non-impact current starting.
As preferably, electrical generator quantity is more than or equal to three, and described switching arrangement carry out switched-mode power supply to system's electrical network, and its number of partitions is more than or equal to two.Switched-mode power supply helps the normal operation of system, if the supplementary controlled system fault can temporarily be transferred to common load such as power, illumination independently district's power supply, another district then is used to start main motor.Electrical generator quantity then can use two electrical generators to give two main motor power supplies respectively under normally used twin screw situation more than or equal to three, and the common load power supply of giving system with another electrical generator.
Under the situation of Auxiliary Control Device or auxiliary asynchronous motor fault, during the electric propulsion system starting, switching arrangement carry out switched-mode power supply to system's electrical network, one of them service area is used to start main motor, with the throw-out-of clutch between main motor and the speed reduction gearing, be transferred to the generator speed of this service area minimum again and main motor is powered, can earlier asynchronous synchronous initiation again, or directly dos-starting synchronously, after the main motor slow start, the rotating speed of electrical generator of slowly raising then (is encouraged the formula synchronous dynamo for electricity, can control the exciting current of electrical generator and main motor), the rotating speed of main motor is followed rising, reaches rated speed of rotation until main motor.After starting successfully, control by normal running again.
As preferably, electrical generator and main motor are at a high speed or the middling speed synchronous dynamo.Can reduce motor volume like this, alleviate motor weight, save installing space.
As preferably, when adjustable pitch propeller had just begun to rotate, its pitch was zero.Pitch is zero to make screw propeller be light condition, and required starting torque is very little, can solve the big problem of torque that the electric propulsion system starting moment mechanical axis of prior art bears, the service life that can improve equipment such as power-transfer clutch.
The beneficial effects of the utility model are: the electric propulsion system that it solves prior art effectively causes the cost of investment height because of adopting converter technique, electric energy loss and harmonic pollution are big, difficult in maintenance, the bigger problem of failure risk of its power plant of boats and ships maritime navigation, the electric propulsion system starting immediate current that has also solved prior art is big, cause the big problem of torque that system's pressure drop of grid is big and starting moment mechanical axis bears, the utility model less investment, convenient for installation and maintenance, over-the-road expense is low, the system reliability height, failure risk in the use is low, and social benefit and economic benefit are obvious.
Description of drawings
Fig. 1 is a kind of structured flowchart of the utility model electric propulsion system;
Fig. 2 is a kind of structural representation of the utility model electric propulsion system.
The specific embodiment
Below by embodiment, and in conjunction with the accompanying drawings the specific embodiment of technical solutions of the utility model is further described.
Embodiment 1
In the embodiment shown in Figure 21 as Fig. 1, a kind of electric propulsion system, comprise five combustion engines 1, five electrical generators 2, switching arrangement 3, two main motors 4 and two propelling units 8, described electrical generator is by switching arrangement and main motor cable connection, switching arrangement carry out switched-mode power supply to system's electrical network, its number of partitions is three, wherein boats and ships such as illumination common load is a service area, about two main motors respectively be a service area, main motor connects propelling unit by power-transfer clutch and speed reduction gearing, described propelling unit is an adjustable pitch propeller, described electrical generator and main motor are electricity and encourage formula high-speed synchronous motor, described electric propulsion system also comprises the Auxiliary Control Device 6 of auxiliary asynchronous motor 5 and the auxiliary asynchronous motor of control, described Auxiliary Control Device is the low capacity frequency converter, auxiliary asynchronous motor connects main motor, and the capacity of auxiliary asynchronous motor is 8% of a main motor.In addition, the Auxiliary Control Device of present embodiment also can adopt soft starter, star-delta starter or autostarter.
When the electric propulsion system of embodiment 1 starts, the internal-combustion engine drives generator operation, system's electrical network is ready, earlier main motor and speed reduction gearing are thrown off, after being defined as zero load, turn-off the excitation of main motor, by the auxiliary asynchronous motor of Auxiliary Control Device starting, auxiliary asynchronous motor band the main motor slow start, follow procedure accelerates to rated speed of rotation then, again main motor is carried out excitation, at this moment, main motor is operated in generating state, by system's automatic synchronizing device main motor is connected to the grid again, after being incorporated into the power networks, cut away auxiliary asynchronous motor immediately, main motor is just under zero load like this, switch to the electrical motor mode of operation by the electrical generator state, realized the non-impact current starting, after main motor reaches rated speed of rotation, with the pitch control of adjustable pitch propeller to zero, power-transfer clutch closes, main motor drives adjustable pitch propeller by speed reduction gearing, and screw propeller rotates, and boats and ships are wanted acceleration and deceleration, the pitch size that only needs to regulate adjustable oar gets final product, the speed of increasing and decrease of pitch can be limited by main motor merit angle, changes suddenly in case motor load is advanced in thrust, causes the synchronous motor step-out.In addition, electrical generator is moved by internal combustion engine drive, and combustion engine is furnished with governor, also can carry out speed governing on demand.
Under the situation of Auxiliary Control Device or auxiliary asynchronous motor fault, during the electric propulsion system starting, switching arrangement carry out switched-mode power supply to system's electrical network, one of them service area is used to start main motor, with the throw-out-of clutch between main motor and the speed reduction gearing, be transferred to the generator speed of this service area minimum again and main motor is powered, can earlier asynchronous synchronous initiation again, or directly dos-starting synchronously, after the main motor slow start, the exciting current of control electrical generator and main motor, slowly raise the then rotating speed of electrical generator, the rotating speed of main motor is followed rising, reaches rated speed of rotation until main motor, after starting successfully, control by normal running again.
If the adjustable pitch propeller fault, and can't repair, the utility model can also use adjustable pitch propeller as the spacing oar, and locking pitch is if will change ship's speed, as long as the rotating speed of regulator generator just can change ship's speed.For the structure that adopts switched-mode power supply, divide a district to be used for the main motor of fault adjustable pitch propeller specially, allow electrical generator be operated in the speed change operating mode; Another district's electrical generator is operated in the constant speed operating mode, is used for common load such as illumination.
Claims (4)
1. electric propulsion system, comprise combustion engine, electrical generator, switching arrangement, main motor and propelling unit, it is characterized in that: described electrical generator (2) is by switching arrangement (3) and main motor (4) cable connection, main motor connects propelling unit (8) by power-transfer clutch (9) and speed reduction gearing (7), described propelling unit is an adjustable pitch propeller, described electrical generator and main motor are synchronous dynamo, described electric propulsion system also comprises the Auxiliary Control Device (6) of auxiliary asynchronous motor (5) and the auxiliary asynchronous motor of control, auxiliary asynchronous motor connects main motor, and the capacity of auxiliary asynchronous motor is 4% to 16% of a main motor.
2. electric propulsion system according to claim 1 is characterized in that described Auxiliary Control Device comprises frequency converter or soft starter or star-delta starter or autostarter.
3. electric propulsion system according to claim 1 is characterized in that described electrical generator quantity more than or equal to three, and described switching arrangement carry out switched-mode power supply to system's electrical network, and its number of partitions is more than or equal to two.
4. electric propulsion system according to claim 1 is characterized in that described electrical generator and main motor are at a high speed or the middling speed synchronous dynamo.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010203004406U CN201694383U (en) | 2010-01-11 | 2010-01-11 | Electric power propulsion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010203004406U CN201694383U (en) | 2010-01-11 | 2010-01-11 | Electric power propulsion system |
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| Publication Number | Publication Date |
|---|---|
| CN201694383U true CN201694383U (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010203004406U Expired - Fee Related CN201694383U (en) | 2010-01-11 | 2010-01-11 | Electric power propulsion system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102951282A (en) * | 2012-11-22 | 2013-03-06 | 永济新时速电机电器有限责任公司 | Electric propelled inland river cargo ship |
| CN103569342A (en) * | 2013-11-11 | 2014-02-12 | 吴长泰 | Power system applied to small-sized ship |
| CN105015752A (en) * | 2015-08-06 | 2015-11-04 | 江苏磁谷科技股份有限公司 | Magnetic coupling propulsion system and application thereof in ship propulsion |
| CN105189283A (en) * | 2013-03-14 | 2015-12-23 | 洋马株式会社 | Ship |
| CN105228895A (en) * | 2013-05-17 | 2016-01-06 | 珀金斯发动机有限公司 | Propulsion system |
-
2010
- 2010-01-11 CN CN2010203004406U patent/CN201694383U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102951282A (en) * | 2012-11-22 | 2013-03-06 | 永济新时速电机电器有限责任公司 | Electric propelled inland river cargo ship |
| CN102951282B (en) * | 2012-11-22 | 2016-07-06 | 永济新时速电机电器有限责任公司 | Electric propulsion inland river cargo ship |
| CN105189283A (en) * | 2013-03-14 | 2015-12-23 | 洋马株式会社 | Ship |
| CN105228895A (en) * | 2013-05-17 | 2016-01-06 | 珀金斯发动机有限公司 | Propulsion system |
| US10113617B2 (en) | 2013-05-17 | 2018-10-30 | Perkins Engines Company Limited | Propulsion system |
| CN103569342A (en) * | 2013-11-11 | 2014-02-12 | 吴长泰 | Power system applied to small-sized ship |
| CN105015752A (en) * | 2015-08-06 | 2015-11-04 | 江苏磁谷科技股份有限公司 | Magnetic coupling propulsion system and application thereof in ship propulsion |
| CN105015752B (en) * | 2015-08-06 | 2017-08-15 | 江苏磁谷科技股份有限公司 | Magnetic coupling propulsion system and its application in Ship Propeling |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110105 Termination date: 20170111 |