CN102963262A - Power supply system for urban transportation vehicle - Google Patents
Power supply system for urban transportation vehicle Download PDFInfo
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- CN102963262A CN102963262A CN2012105068887A CN201210506888A CN102963262A CN 102963262 A CN102963262 A CN 102963262A CN 2012105068887 A CN2012105068887 A CN 2012105068887A CN 201210506888 A CN201210506888 A CN 201210506888A CN 102963262 A CN102963262 A CN 102963262A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
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- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/72—Electric energy management in electromobility
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Abstract
The invention provides a power supply system for an urban transportation vehicle, which comprises a base station power supply unit, an electric energy transmission unit and a vehicle-mounted power transformation unit, wherein the base station power supply unit comprises a high-frequency inverter and a power supply type convertor; an input end of the high-frequency inverter inputs direct current; an output end of the high-frequency inverter is connected with an input end of the power supply type convertor; the power supply type convertor is used for converting a constant voltage source output by the high-frequency inverter into a constant current source; the electric energy transmission unit comprises a ring transmission cable and an electric energy receiver; the ring transmission cable is buried along a road and connected with an output end of the power supply type convertor to form a high-frequency magnetic field; the electric energy receiver is arranged at the lower part of the vehicle to induct induction current generated by the high-frequency magnetic field; the vehicle-mounted power transformation unit comprises a vehicle-mounted current transformer; an input end of the vehicle-mounted current transformer is connected with the electric energy receiver; and an output end of the vehicle-mounted current transformer is connected with a drive motor of the vehicle.
Description
Technical field
The present invention relates to power technology, relate in particular to a kind of city traffic vehicle electric power system.
Background technology
At present, rolling stock (such as motor train unit, electric locomotive and city railway vehicle etc.) all is to power to rolling stock by contact system or the 3rd rail, above-mentioned two kinds of power supply modes all require to lay supply line in rolling stock operation whole process, also to build supporting Infrastructure simultaneously, such as contact system and strut bar thereof etc.
In Traffic Systems, in the practical application such as city railway vehicle and urban electric power public transit vehicle, need to set up and be subjected to electrical network and other Infrastructure, because contact electrical network and Infrastructure are arranged on the city space outerpace, not only take the city space, it is attractive in appearance to affect city environment, and existing contact system construction passes into cost height and poor stability.
Summary of the invention
The invention provides a kind of city traffic vehicle electric power system, be used for solving the technological deficiency that prior art city traffic vehicle electric power system takies city space, cost height and poor stability.
A kind of city traffic vehicle electric power system provided by the invention comprises base station power unit, delivery of electrical energy unit and vehicle-mounted power transformation unit;
Described base station power unit comprises high-frequency inverter and power supply type changer; Described high-frequency inverter input end input dc power, the mouth of described high-frequency inverter is connected with the input end of described power supply type changer, and described power supply type changer is used for the constant pressure source of described high-frequency inverter output is transformed to constant current source;
Described delivery of electrical energy unit comprises annular transmission cable and electric energy receiver, it is along the line that described annular transmission cable is embedded in road, described annular transmission cable is connected to form high frequency magnetic field with the mouth of described power supply type changer, described electric energy receiver is arranged on lower vehicle, described electric energy receiver and described annular transmission cable gap arrange the formation detachable Transformer, produce inducing current with induction of high frequency magnetic field;
Described vehicle-mounted power transformation unit comprises vehicle-mounted current transformer; The input end of described vehicle-mounted current transformer is connected with described electric energy receiver, and the mouth of described vehicle-mounted current transformer is used for being connected with the drive motor of vehicle.
Aforesaid city traffic vehicle electric power system, preferably, described base station power unit also comprises rectifier, and the input end of described rectifier is used for being connected with power frequency supply, and the mouth of described rectifier is connected with the input end of described high-frequency inverter.
Aforesaid city traffic vehicle electric power system, preferably, described vehicle-mounted current transformer comprises vehicle-mounted rectifier and vehicle-mounted inverter; The input end of described vehicle-mounted rectifier is connected with described electric energy receiver, and the mouth of described vehicle-mounted rectifier is connected with the input end of described vehicle-mounted inverter;
Described vehicle-mounted power transformation unit also comprises accumulator, and described accumulator is connected on the mouth of described vehicle-mounted rectifier.
Aforesaid city traffic vehicle electric power system, preferably, described accumulator comprises DC-DC changer and energy-storage travelling wave tube, described DC-DC changer is used for controlling described vehicle-mounted rectifier output voltage to be reduced to described energy-storage travelling wave tube charging, or controls described energy-storage travelling wave tube output voltage rising to described vehicle-mounted inverter power supply.
Aforesaid city traffic vehicle electric power system, preferably, described energy-storage travelling wave tube is super capacitor or storage battery or super capacitor and storage battery in parallel.
Aforesaid city traffic vehicle electric power system, preferably, described power supply type changer is voltage transformer, the former limit of described voltage transformer is connected with the mouth of described high-frequency inverter, be serially connected with the first filter inductance and the second filter inductance on the former edges generating line of described voltage transformer, be provided with the first building-out capacitor between the former edges generating line of described voltage transformer; Be serially connected with the 3rd inductance and the second building-out capacitor on the secondary bus of described voltage transformer.
Aforesaid city traffic vehicle electric power system, preferably, described base station power unit also comprises the first electric capacity of voltage regulation, described the first electric capacity of voltage regulation is serially connected in the input end of described high-frequency inverter.
Aforesaid city traffic vehicle electric power system, preferably, described vehicle-mounted power transformation unit also comprises the second electric capacity of voltage regulation, described the second electric capacity of voltage regulation is serially connected in the mouth of described vehicle-mounted rectifier.
Aforesaid city traffic vehicle electric power system, preferably, described electric energy receiver is slab construction, described electric energy receiver inside is provided with induction coil.
City traffic vehicle electric power system provided by the invention; the base station power unit is for generation of the high frequency Constant Electric Current; produce high frequency magnetic field by the annular transmission cable in the delivery of electrical energy unit; electric energy receiver induction of high frequency magnetic field produces the drive motor power supply that inducing current is the city traffic vehicle; because annular transmission cable can be embedded in the road, does not need to set up electrical network, does not take the city space; can better protect urban look, and cost is low, safety is good.
Description of drawings
The schematic diagram of the city traffic vehicle electric power system that Fig. 1 provides for the embodiment of the invention;
The schematic diagram of the accumulator that Fig. 2 provides for the embodiment of the invention;
The scheme drawing of a kind of concrete application mode of the city traffic vehicle electric power system that Fig. 3 provides for the embodiment of the invention;
The scheme drawing of the another kind of concrete application mode of the city traffic vehicle electric power system that Fig. 4 provides for the embodiment of the invention.
Reference numeral:
1-base station power unit; 2-delivery of electrical energy unit; The vehicle-mounted power transformation of 3-unit.
The specific embodiment
With reference to figure 1, the schematic diagram of the city traffic vehicle electric power system that Fig. 1 provides for the embodiment of the invention.
As shown in Figure 1, the city traffic vehicle electric power system that present embodiment provides comprises base station power unit 1, delivery of electrical energy unit 2 and vehicle-mounted power transformation unit 3.
Base station power unit 1 comprises high-frequency inverter and power supply type changer; High-frequency inverter input end input dc power, the mouth of high-frequency inverter is connected with the input end of power supply type changer, high-frequency inverter becomes high-frequency alternating current with the dc inverter of input, and the power supply type changer is used for the constant pressure source of high-frequency inverter output is transformed to constant current source.
The high-frequency inverter input dc power can have various ways, preferably, base station power unit 1 also comprises rectifier, the input end of rectifier is used for power frequency supply or is connected, the mouth of rectifier is connected with the input end of high-frequency inverter, be the high-frequency inverter input dc power by rectifier, also can be directly to the high-frequency inverter input dc power.In order to improve the stability of rectifier output voltage, base station power unit 1 also comprises the first electric capacity of voltage regulation C1, and the first electric capacity of voltage regulation C1 is serially connected in the mouth of rectifier.
Particularly, rectifier can be the uncontrollable rectifying circuit of three-phase of a plurality of diode D1 ~ D6 composition, and rectifier also can be other forms of rectifier.The direct current input of high-frequency inverter can be divided into two kinds of forms, and is a kind of for power frequency supply is three-phase 380v alternating current, three-phase 380v alternating current input rectifier, and output rated voltage is the direct current (DC) of 890v after the rectifier rectification; Another is for directly entering direct current 750V power supply at C end and D termination; This direct current (DC) 890V or 750V are by after the electric capacity of voltage regulation C1 voltage stabilizing, input to high-frequency inverter, high-frequency inverter can be a plurality of insulated gate bipolar transistor power devices (Insulated Gate Bipolar Transistor, abbreviation IGBT) the two-phase bridge-type of V1 ~ V4 composition is controlled inverter entirely, and high-frequency inverter also can be other forms of inverter.Output frequency is greater than the high frequency constant voltage alternating current of 25kHz after the high-frequency inverter inversion for the 890v direct current (DC) of rectifier output, and current value is not less than 150A.The power supply type changer can have multiple way of realization, as long as can satisfy high frequency constant voltage alternating current is transformed into high frequency constant current alternating current, and the power supply type changer can guarantee the stable of high-frequency currents.
Delivery of electrical energy unit 2 comprises annular transmission cable 21 and electric energy receiver 22, it is along the line that annular transmission cable 21 is embedded in road, annular transmission cable 21 is connected to form high frequency magnetic field with the mouth of power supply type changer, electric energy receiver 22 is arranged on lower vehicle, electric energy receiver 22 arranges with annular transmission cable 21 gaps and forms detachable Transformer T2, produces inducing current with induction of high frequency magnetic field.The power supply type changer is transformed into the high frequency Constant Electric Current with high frequency constant voltage alternating current, can improve the stability of the high frequency magnetic field of annular transmission cable 21 formation.
Particularly, the diameter of annular transmission cable 21 can be 125 ㎜, and electric energy receiver 22 is specifically as follows slab construction, and electric energy receiver 22 inside are provided with induction coil.Electric energy receiver 22 can be formed by magnetic core ferrite and wound coil encapsulation, electric energy receiver 22 length are less than 1400 ㎜, width is less than 1000 ㎜, height is less than 250 ㎜, can be constant in the specified delivery of electrical energy efficient of distance floor level position 50 ㎜ maintenance, can guarantee to power to vehicle in ± 200 ㎜ in alignment error.The induction coil of electric energy receiver 22 inside can be responded to the high frequency magnetic field that annular transmission cable 21 forms, and produces inducing current, and electric energy receiver 22 also can be other structures, structure types such as U-shaped or E shape.
Preferably, the power supply type changer can be voltage transformer T1, the former limit of voltage transformer T1 is connected with the mouth of high-frequency inverter, is serially connected with the first filter inductance L1 and the second filter inductance L2 on the former edges generating line of voltage transformer T1, is provided with the first building-out capacitor C2 between the former edges generating line of voltage transformer T1; Be serially connected with the 3rd filter inductance L3 and the second building-out capacitor C3 on the secondary bus of voltage transformer T1, the second building-out capacitor C3 can increase active volt-amperes, reduce leakage inductance, raises the efficiency.The 890v constant voltage electricity of high-frequency inverter output carries out filtering by the first filter inductance L1 and the second filter inductance L2, put forward high-tension stability, produce Constant Electric Current by voltage transformer T1 transformation again, by the 3rd filter inductance L3 Constant Electric Current is carried out filtering, improve the stability of electric current.Because the air gap that annular transmission cable 21 and electric energy receiver are 22 is larger, leakage inductance is larger, and power factor is lower, and the second building-out capacitor C3 can improve power factor.
Vehicle-mounted power transformation unit comprises vehicle-mounted current transformer; The input end of vehicle-mounted current transformer is connected with electric energy receiver 22, and the drive motor M that the mouth of vehicle-mounted current transformer is used for connecting with car is connected.Preferably, vehicle-mounted current transformer comprises vehicle-mounted rectifier and vehicle-mounted inverter; The input end of vehicle-mounted rectifier is connected with electric energy receiver 22, and the mouth of vehicle-mounted rectifier is connected with the input end of vehicle-mounted inverter, and the mouth of vehicle-mounted inverter is used for being connected with the drive motor M of vehicle.In order to improve the stability of vehicle-mounted rectifier output voltage, vehicle-mounted power transformation unit 3 also comprises the second electric capacity of voltage regulation C4, and the second electric capacity of voltage regulation C4 is serially connected in the mouth of vehicle-mounted rectifier.
Particularly, vehicle-mounted rectifier is the uncontrollable rectifying circuit of two-phase that a plurality of diode D7 ~ D10 forms, vehicle-mounted rectifier changes the inducing current that electric energy receiver 22 produces into direct current (DC), this direct current (DC) is through the three-phase bridge all-wave vehicle-mounted inverter that IGBT power device V5 ~ V10 forms, by PWMI mode of frequency regulation control drive motor M.
The city traffic vehicle electric power system that present embodiment provides; base station power unit 1 is for generation of the high frequency Constant Electric Current; produce high frequency magnetic field by the annular transmission cable 21 in the delivery of electrical energy unit 2; electric energy receiver 22 induction of high frequency magnetic fields produce the drive motor M power supply that inducing current is the city traffic vehicle; because annular transmission cable 21 can be embedded in the road, does not need to set up electrical network, does not take the city space; can better protect urban look, and cost is low, safety is good.
On the basis of above-described embodiment technical scheme, vehicle-mounted power transformation unit 3 also comprises accumulator EU, and accumulator EU is connected on the mouth of vehicle-mounted rectifier.The schematic diagram of the accumulator that Fig. 2 provides for the embodiment of the invention, as shown in Figure 2, preferably, accumulator ED comprises DC-DC changer and energy-storage travelling wave tube, the DC-DC changer is used for controlling vehicle-mounted rectifier output voltage to be reduced to the energy-storage travelling wave tube charging, or the rising of control energy-storage travelling wave tube output voltage is powered to vehicle-mounted inverter.Particularly, energy-storage travelling wave tube can be super capacitor or storage battery, and energy-storage travelling wave tube also can be rechargeable electrical energy and the storage battery of parallel connection.
A, B point among this accumulator access Fig. 1 is by K switch 1 ~ K3, diode D11 ~ 12 and IGBT power device V11 in the controller control DC-DC changer ~ 12 work.When charging to super capacitor C7, the DC-DC changer is operated in the BUCK decompression mode, with the lower voltage of vehicle-mounted rectifier output, is super capacitor C7 charging.When super capacitor C7 to when discharge, the DC-DC changer is operated in the BOOST boost mode, the voltage of super capacitor C7 is raise power to vehicle-mounted inverter.
With reference to figure 3, the scheme drawing of a kind of concrete application mode of the city traffic vehicle electric power system that Fig. 3 provides for the embodiment of the invention.
As shown in Figure 3, the city traffic vehicle electric power system that above-described embodiment provides, can be applied on the city railway vehicle, can build a light railways along the route of urban public transport, the rail level height flushes with ground, base station power unit 1 can be installed in the rack of road both sides, and the control devices such as base station power controller and relay switch also are installed in the rack.
With the annular transmission cable 21 pre-buried track inboards of arriving, for the high frequency magnetic field of avoiding producing produces eddy current in rigid track, cable distance rail distance should be not less than the distance of 10mm, annular transmission cable 21 is divided into multistage, the length of every section annular transmission cable 21 and the equal in length of city railway vehicle, be that city railway vehicle is when moving directly over annular transmission cable 21, guarantee that the magnetic field that annular transmission cable 21 is set up all is that city railway vehicle is used, reduce high frequency magnetic field surrounding vehicles or pedestrian are exerted an influence.Can control by relay switch the break-make of every section annular transmission cable 21, particularly, be provided with insulating regions between every section annular transmission cable 21, in insulating regions, be provided with signal reader, when Vehicle Driving Cycle arrived this zone, near the base station power controller the signal of vehicle can being passed to, base station power controller were judged the position of vehicle according to signal, the control relay switch is connected, so that the annular transmission cable 21 interval cables that vehicle is travelling produce high frequency magnetic field.
The electric energy receiver 22 that the while vehicle bottom is equipped with, electric energy receiver 22 is accepted high frequency magnetic field and high frequency magnetic field is converted into high-frequency alternating current, offers the vehicle-mounted power transformation unit 3 of vehicle.The inductive loop on vehicle for fear of electromagnetic interference and high frequency magnetic field, vehicle adopts good shielding and safety method, and car body adopts aluminum alloy material, and wheel adopts high-intensity resin.
The city traffic vehicle electric power system that present embodiment provides; be applied on the city railway vehicle; base station power unit 1 is for generation of the high frequency Constant Electric Current; produce high frequency magnetic field by the annular transmission cable 21 in the delivery of electrical energy unit 2; electric energy receiver 22 induction of high frequency magnetic fields produce the drive motor power supply that inducing current is the city traffic vehicle; because annular transmission cable 21 can be embedded in the road; do not need to set up electrical network; do not take the city space; can better protect urban look, and cost is low, safety is good.
With reference to figure 4, a kind of implementation scheme drawing of the city traffic vehicle electric power system that Fig. 4 provides for the embodiment of the invention.
As shown in Figure 4, the city traffic vehicle electric power system that above-described embodiment provides, can also be applied on the urban public traffic vehicles, annular transmission cable 21 is pre-buried below road, annular transmission cable 21 is divided into multistage, the length of every section annular transmission cable 21 and the equal in length of urban public traffic vehicles, be that the city traffic vehicle is when moving directly over annular transmission cable 21, guarantee that the magnetic field that annular transmission cable 21 is set up all is that urban public traffic vehicles is used, reduce that surrounding vehicles or pedestrian are exerted an influence.Break-make by every section annular transmission cable 21 of relay switch control, be provided with insulating regions between every section annular transmission cable 21, in insulating regions, be provided with signal reader, when Vehicle Driving Cycle arrives this zone, near the signal of vehicle can being passed to base station power controller, the base station power controller is according to the position of signal judgement vehicle, and the control relay switch is connected, so that the annular transmission cable 21 interval cables that vehicle is travelling produce high frequency magnetic fields.
The electric energy receiver 22 that the while vehicle bottom is equipped with, electric energy receiver 22 is accepted high frequency magnetic field and high frequency magnetic field is converted into high-frequency alternating current, offers the vehicle-mounted power transformation unit 3 of vehicle.
The city traffic vehicle electric power system that present embodiment provides; be applied on the urban public traffic vehicles; base station power unit 1 is for generation of the high frequency Constant Electric Current; produce high frequency magnetic field by the annular transmission cable 21 in the delivery of electrical energy unit 2; electric energy receiver 22 induction of high frequency magnetic fields produce the drive motor power supply that inducing current is the city traffic vehicle; because annular transmission cable 21 can be embedded in the road; do not need to set up electrical network; do not take the city space; can better protect urban look, and cost is low, safety is good.
The city traffic vehicle electric power system that above-described embodiment provides can also be used in much industries such as high-risk, explosion-proof, and such as using the again industry such as under-water operation and oil exploration, concrete application mode is similar to the above embodiments, does not repeat them here.
It should be noted that at last: above each embodiment is not intended to limit only in order to technical scheme of the present invention to be described; Although with reference to aforementioned each embodiment the present invention is had been described in detail, those of ordinary skill in the art is to be understood that: it still can be made amendment to the technical scheme that aforementioned each embodiment puts down in writing, and perhaps some or all of technical characterictic wherein is equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution break away from the scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a city traffic vehicle electric power system is characterized in that, comprises base station power unit, delivery of electrical energy unit and vehicle-mounted power transformation unit;
Described base station power unit comprises high-frequency inverter and power supply type changer; Described high-frequency inverter input end input dc power, the mouth of described high-frequency inverter is connected with the input end of described power supply type changer, and described power supply type changer is used for the constant pressure source of described high-frequency inverter output is transformed to constant current source;
Described delivery of electrical energy unit comprises annular transmission cable and electric energy receiver, it is along the line that described annular transmission cable is embedded in road, described annular transmission cable is connected to form high frequency magnetic field with the mouth of described power supply type changer, described electric energy receiver is arranged on lower vehicle, described electric energy receiver and described annular transmission cable gap arrange the formation detachable Transformer, produce inducing current with induction of high frequency magnetic field;
Described vehicle-mounted power transformation unit comprises vehicle-mounted current transformer; The input end of described vehicle-mounted current transformer is connected with described electric energy receiver, and the mouth of described vehicle-mounted current transformer is used for being connected with the drive motor of vehicle.
2. city traffic vehicle electric power system according to claim 1, it is characterized in that, described base station power unit also comprises rectifier, and the input end of described rectifier is used for being connected with power frequency supply, and the mouth of described rectifier is connected with the input end of described high-frequency inverter.
3. city traffic vehicle electric power system according to claim 1 and 2 is characterized in that, described vehicle-mounted current transformer comprises vehicle-mounted rectifier and vehicle-mounted inverter; The input end of described vehicle-mounted rectifier is connected with described electric energy receiver, and the mouth of described vehicle-mounted rectifier is connected with the input end of described vehicle-mounted inverter;
Described vehicle-mounted power transformation unit also comprises accumulator, and described accumulator is connected on the mouth of described vehicle-mounted rectifier.
4. city traffic vehicle electric power system according to claim 3, it is characterized in that, described accumulator comprises DC-DC changer and energy-storage travelling wave tube, described DC-DC changer is used for controlling described vehicle-mounted rectifier output voltage to be reduced to described energy-storage travelling wave tube charging, or controls described energy-storage travelling wave tube output voltage rising to described vehicle-mounted inverter power supply.
5. city traffic vehicle electric power system according to claim 4 is characterized in that, described energy-storage travelling wave tube is super capacitor or storage battery or super capacitor and storage battery in parallel.
6. city traffic vehicle electric power system according to claim 1 and 2, it is characterized in that, described power supply type changer is voltage transformer, the former limit of described voltage transformer is connected with the mouth of described high-frequency inverter, be serially connected with the first filter inductance and the second filter inductance on the former edges generating line of described voltage transformer, be provided with the first building-out capacitor between the former edges generating line of described voltage transformer; Be serially connected with the 3rd inductance and the second building-out capacitor on the secondary bus of described voltage transformer.
7. city traffic vehicle electric power system according to claim 1 and 2 is characterized in that, described base station power unit also comprises the first electric capacity of voltage regulation, and described the first electric capacity of voltage regulation is serially connected in the input end of described high-frequency inverter.
8. city traffic vehicle electric power system according to claim 1 and 2 is characterized in that, described vehicle-mounted power transformation unit also comprises the second electric capacity of voltage regulation, and described the second electric capacity of voltage regulation is serially connected in the mouth of described vehicle-mounted rectifier.
9. city traffic vehicle electric power system according to claim 1 and 2 is characterized in that, described electric energy receiver is slab construction, and described electric energy receiver inside is provided with induction coil.
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| CN201210506888.7A CN102963262B (en) | 2012-11-30 | 2012-11-30 | Power supply system for urban transportation vehicle |
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| CN105438008A (en) * | 2014-09-25 | 2016-03-30 | 中车大连电力牵引研发中心有限公司 | Traction system for railway vehicle |
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| WO2016180019A1 (en) * | 2015-05-11 | 2016-11-17 | 永济新时速电机电器有限责任公司 | Auxiliary converter and vehicle |
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| CN112706660A (en) * | 2019-10-25 | 2021-04-27 | 中车株洲电力机车研究所有限公司 | Power supply system, train carriage and propulsion system |
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| CN106374629B (en) * | 2016-09-28 | 2019-03-05 | 中车唐山机车车辆有限公司 | Electromagnetic induction electric energy transmission system |
| CN106505679A (en) * | 2016-11-28 | 2017-03-15 | 中车大连电力牵引研发中心有限公司 | Rail vehicle charger |
| CN107351727A (en) * | 2017-08-15 | 2017-11-17 | 中车唐山机车车辆有限公司 | Vehicle powering system and vehicle |
| CN112706660A (en) * | 2019-10-25 | 2021-04-27 | 中车株洲电力机车研究所有限公司 | Power supply system, train carriage and propulsion system |
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| CN102963262B (en) | 2015-07-08 |
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