JP2000335498A - Electric power feeding facility for aircraft - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a drop in voltage of electric power for an aircraft, in a facility for feeding electric power to the aircraft during parking by converting commercial electric power into electric power of 400 Hz for the aircraft. SOLUTION: Transformed commercial electric power is fed from a power receiving and transforming facility 2 for commercial electric power in a terminal building 1 to a pit 7 provided on a spot 6 through a cable 8 and then fed to an inverter vehicle 11. An inverter for converting commercial electric power into electric power of 400 Hz for an aircraft is loaded on the inverter vehicle 11, and converted electric power for an aircraft is fed to an aircraft A through a short secondary side cable 19. When electric power of 400 Hz is fed, a voltage drop is easily generated. However, since the secondary side cable 19 is short, a voltage drop is reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aircraft parked at a spot provided along a terminal building at an airport, which is equipped with electric equipment such as lighting, a pump, a meal cart, and a battery while the aircraft is parked. The present invention relates to a facility for supplying electric power for aircraft.

[0002]

2. Description of the Related Art 400 Hz 115 V and 2 Hz are used for aircraft electric power in order to prevent flickering of lighting and to reduce the size of electric motors.
High-frequency power of 00 V is used. Power is supplied from a generator driven by the main engine during flight, and power is supplied from a generator driven by an auxiliary engine provided at the tail during parking. Auxiliary engines generate noise and harmful gases, and are instructed not to operate while parked until just before moving.

For this reason, as shown in FIGS. 4 and 5, aircraft power is supplied from an external facility to aircraft A parked.
A in Figure 4 is the terminal building, a ₁ in the boarding bridges, 50 sent from the power receiving and transforming equipment a ₂ installed in the terminal building a
The commercial power of Hz or 60 Hz, the conversion apparatus a ₃ 400
It converted into Hz aircraft power, and power transmission in underground cable b ₂ to the pit b ₁ provided on the spot b, are powering the aircraft A connection cable c. Also as shown in Figure 5, equipped with a 400Hz generator e driven by the engine of the vehicle d, it is powered by connection cable e _1.

As a converter a ₃ in FIG. 4, it is the format used the format and stationary inverter using an electric generator,
Both types require a large installation area for the converter, and the same number of converters and underground cables as the spot b need to be provided. However, although the number of spots in one terminal building a is about 5 to 25, the number of spots simultaneously used for parking is about half on average, so that the operation rate of the apparatus is low. Spot b from terminal building a
When a high-frequency current of 400 Hz is transmitted to a distance of up to 115 V, the voltage drop due to impedance is significant,
Therefore, a control device for maintaining the voltage is required, which increases the cost. Those using a motor generator also require maintenance costs due to the large number of frictional parts. Also In the spot having a passage in the form of continuously arranged boarding bridges the end of the passenger passage extending from the terminal building a (rotunda), the provided converter a ₃ in the lower part of the rotunda until the aircraft from the rotunda Aircraft cables are laid, but in this case also, a voltage drop occurs for the length of the cables. As for the vehicle d of FIG. 5 equipped with an engine-driven 400 Hz generator e, there are a type in which the generator is mounted on a general-purpose truck, and a type in which the vehicle loaded with the generator is towed by a general-purpose truck.
Both types are not preferred in terms of emitting noise and exhaust,
The versatility of the general-purpose truck is difficult to operate because the left and right and rear views are narrow.

[0005]

SUMMARY OF THE INVENTION The present invention relates to a system for converting commercial power to aircraft power of 400 Hz, which has a high operation rate of the device, a small power loss and voltage drop during power transmission, and a low friction loss. It is an object to obtain a device that does not cause such a problem.

[0006]

Means for solving the above-mentioned problem is that, as described in claim 1, commercial power received by a power receiving and transforming device provided in a terminal building at an airport is provided.
In aircraft power supply facilities that convert to 400 Hz aircraft power and transmit power to the power receiving unit of the aircraft, from the power receiving and transforming device to the pit provided at the spot where the aircraft parks,
An underground cable for transmitting commercial power is laid, and an inverter for converting commercial power transmitted by the underground cable to aircraft power of 400 Hz is mounted on a moving vehicle, and a primary-side cable connected to the inverter and the underground cable When,
A secondary cable connected to a power receiving unit of the aircraft is provided.

According to this means, the commercial power extracted from each substation in the terminal building is connected to the inverter on the moving vehicle from the pit provided at the spot via the underground cable, and the inverter uses the inverter for the 400 Hz aircraft. The power is converted to electric power and supplied to the aircraft from the secondary cable. The voltage of the secondary cable is very short and the voltage drop is small.
When the auxiliary engine of the aircraft becomes drivable, the moving vehicle moves to another spot and supplies power to the aircraft there.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, A is an aircraft, 1 is a terminal building, 2 is a 50 / 60H provided in the building.
z power receiving and transforming equipment. Terminal Building 1
Has a fixed passenger passage 3 and a passage end 4 called a rotunda, and communicates with the aircraft A via an extendable boarding bridge 5 connected to the passage end 4. A pit 7 is provided at a spot 6 as a parking place, and a commercial power cable 8 extending from the substation facility 2 is laid. As for the commercial power cable 8, the portion of the boarding bridge 5 is an underground cable,
Commercial power is transmitted from the power receiving and transforming facility 2. It is desirable that the commercial power cable 8 be an underground cable over the entire length. As shown in FIG. 2, a lid 9 and a slide-type waterproof receptacle 10 that can protrude and retract from a small hole in the lid 9 are installed in the pit 7, and a cable 8 is connected to the slide-type waterproof receptacle 10. The commercial power transmitted by the cable 8 is 50 Hz, 420 V, or 60 H
z, 440 V, and 400
Hz, 115V and 200V.

FIG. 2 shows the appearance of the inverter car 11, in which a circuit and a device of the inverter 12 and the electric section 13 shown in FIG. Inverter car 11
Is provided with wheels 15, 15 on the lower surface of the vehicle body 14,
A stair-type working table 16 and a driver's seat 17 are provided before and after. 17a is a steering handle. A primary cable 18 and a secondary cable 19 are connected to the inverter 12,
The plug 18a and the plug 19a are connected to each other, the plug 18a is connected to the sliding waterproof receptacle 10, and the plug 19a is connected to the receptacle 20 of the aircraft A.

[0010] The slide type waterproof receptacle 1
Instead of 0, a plug may be provided in the cable 8 in the pit 7 so that the cable 8 can be pulled out from the pit 7, and the plug may be directly connected to the inverter 12.

In FIG. 3, an inverter 12 includes a circuit 2
In the circuit 21, an input circuit breaker 23, an input rectifier 24, an inverter element 25, an output transformer 26 having a delta star connection, and an output circuit breaker 27 are installed in series.
The commercial power of 420 / 440V, 50 / 60Hz three-phase three-wire is converted into AC115 / 200V, 400Hz three-phase four-wire aircraft power, and supplied from the cable 19.

A circuit 28 branched from the circuit 21 sends the power transformed by the input transformer 29 to the control circuit. An electric circuit 30 branches from the circuit 28, and an input transformer 31 and a charger 32 Is provided to charge the storage battery 33. The terminal of the storage battery 33 is connected via a chopper controller 34 to a DC motor 35 for driving wheels.
5 is connected to one wheel 15 via a transmission mechanism 36. The chopper controller 34 controls the rotation speed of the DC motor 35 and controls the speed of the inverter vehicle 11.

In the inverter car 11, the primary cable 18 is about 5 m, and the secondary cable 19 is about 3 m. With this length, the sliding waterproof receptacle 10 of the pit 7 and the receptacle 20 of the aircraft A are provided. Can be fully connected. 4 of these cables 18 and 19
The 00 Hz aircraft power flows through the secondary cable 1
Since the length is only 3 m, the voltage drop is extremely small, and the voltage drop is about 6.6 times smaller than when a 15 m cable is used. Further, the weight of the inverter car 11 can be constituted by about 1 ton including the storage battery.

In the embodiment shown in FIGS. 2 and 3, the inverter car 11 is a motor-driven self-propelled vehicle.
Since 1 moves only on the flat spot 6, the DC motor 35 may be small.

[0015]

As is apparent from the above description, claim 1
According to the means, since the commercial power is converted into 400 Hz aircraft power at a position immediately adjacent to the parked aircraft and supplied to the aircraft, the secondary cable can be short, and the voltage drop of the aircraft power is small. This has the effect of supplying power having a rated voltage. In addition, since a power supply device for exchanging power is mounted on a moving vehicle, a power supply device corresponding to the number of parked vehicles that is smaller than the number of spots is sufficient. It has the advantage of being extremely economical.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment of the present invention.

FIG. 2 is a front view of a main part of the embodiment.

Fig. 3 Connection diagram of electric inverter car

FIG. 4 is a front view showing an example of a conventional facility.

FIG. 5 is a front view showing another example of conventional equipment.

[Explanation of symbols]

2 Power receiving and transforming equipment 6 Spot 7 Pit 8 Commercial power cable 10 Sliding waterproof plug 11 Inverter car 12 Inverter 13 Electric part 18 Primary cable 19 Secondary cable 24 Input rectifier 25 Inverter element 26 Output transformer 29,31 Input transformer 33 storage battery

Claims (1)

[Claims] 1. An aircraft power supply system for converting commercial power received by a power receiving / transforming device provided in a terminal building at an airport into aircraft power of 400 Hz and transmitting the power to a power receiving unit of the aircraft. From the pit provided at the spot where the aircraft parks, lay an underground cable for transmitting commercial power, mounted an inverter on the mobile vehicle that converts the commercial power transmitted by the underground cable to 400 Hz aircraft power, A power supply device for an aircraft, wherein the inverter is provided with a primary cable connected to the underground cable and a secondary cable connected to a power receiving unit of the aircraft.