JPS609336A - Power source for elevator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a power supply device for an elevator, and particularly to one using a fuel cell.

Elevators start and stop frequently.

Load fluctuations are also significant. For this reason, the power supply that supplies electric power to the elevator motor must ensure that the final temperature rise when the elevator is in continuous operation is within the allowable value, and that there is no extreme voltage drop in response to the peak load that occurs during acceleration and deceleration. This was decided as a matter of honor. For normal-like organs, the former, ie.

While power supplies are determined by the temperature rise condition, elevators are determined by the latter, that is, the pressure drop condition. In general, the limit that a power supply device can withstand overload is small, so an elevator requires a large capacity compared to the power supply capacity of ordinary equipment.

However, in the past, the power source for the elevator was selected in the same way as the elevator, which caused the problem of insufficient capacity.

This invention was made in view of the above problems.

By using a fuel cell that is highly responsive and has a large surface weight for peak loads, the purpose is to enable the power supply capacity to be selected in the same way as a normal tF generator.

An embodiment of this invention is shown in FIGS. 1 and 2.

First, Fig. 1 shows a block circuit diagram of an elevator control device, (11 is a gas pipe for supplying city gas,
2) is a fuel cell to which this pipe +11 is connected and which burns city gas to generate DC power, (3a) (31)
) are each connected to a fuel cell at one end (21 (+) poles and ←)
A single-pole type breaker connected to the pole, (4) is a breaker (
3a) A reverse current blocking diode connected in order to the other end, (
5) is a rechargeable and dischargeable secondary battery whose (+) pole is connected to the cathode of the reverse current blocking diode (5) and whose ←) pole is connected to the other end of the breaker (3b). is used. The above fuel cell (2), breaker (3a)
(3b) Backflow blocking diode (5) and storage battery (5)
) constitutes a power supply (0 ports). (611 is the first inverter ff1 that is connected to the power supply device (1o) and converts DC into three-phase AC with variable voltage and variable frequency)
is a first visiting electric motor powered by three-phase alternating current from this first inverter (IT), and fil) is a first hoisting machine driven by this first induction motor IC.
A first heel (101) and a first heel (io) are raised and lowered via the tenth main rope (gl). (+21, (721, +821, (!121.

(+02) and (112) are respectively the second inverter, the main rope of the second hoisting machine 2M2 for the second πJ conduction motor, the second heel, and the second shoe joint, 1st inverter (611, 1st induction motor ff1), 1st hoisting machine 1), 10th main rope (91J-1st rope (1o1)
) and the first joint head (U+).

Figure 2 shows a fuel cell (21). No. 361 of
I will introduce the one described on page -;i'>page 375. In the figure (
12) is the Burning 1 treatment equipment, and when the city gas is sent in, the desulfurization equipment (12A) removes the sulfur content, and further mixes water vapor, resulting in 7C! r, send quality device (12B). This reformer (12B) consists of a reaction tube filled with a barb, and is heated with an externally installed barb (12C) to maintain the temperature of city gas at approximately 800°C. City gas has been revised to 9.

- Changes to a mixed gas of Vt carbon and hydrogen gas. - Carbon oxide is harmful in the fuel cell (2), so change 5. li, loading (12I)) is converted to carbon dioxide. Also, water vapor can be harmful to fuel cells (21゛, so -J:
In some cases, excess water may be extracted by removing the water. A mixed gas of hydrogen gas and carbon dioxide obtained in this way.

Usually, hydrogen gas has a volume ratio of 80 or more. This 7.1
<.

Combined gas was heated to 200″C, which is the operating temperature of the fuel cell: Culm D4
The fuel is heated to a temperature of 100.degree. C. and pumped into the fuel tank (3a) of the fuel cell (2).

Then, an electrochemical reaction occurs with the other air chamber (13b) 17) IIJ element, and DC power is generated here. This DC power is output to the outside via an anode (13c) and a cathode (13d). When an electrical load is connected, the electric wire provided in the main body u31 of the fuel cell (2)
A closed circuit is formed via 13e).

In the lamp phase battery (2) that generates electricity in this way, the energy of the hydrogen gas converted into electrical energy by the two main bodies 031 is approximately 50 ts, and the remainder is converted into heat.
The main body (131) is heated. This heat is removed by a cooler (13f) that uses water as a refrigerant, and the main body (131) is kept at a constant temperature. A part of it is introduced into the reformer 1 and turned into steam.
1 (1■). The rest is sent to the exhaust heat recovery device. -1: The exhaust from the air chamber (13b) and the burner (
Any exhaust gas from 12c) is sent to the exhaust heat recovery device α0 where water is separated. A part of this water is sent to the steam generator f151, and the other part is sent back to the cooler (13) via the starting heater circle, which is used to pre-raise the temperature in the system to a predetermined value at startup.

Next, the operation of the above embodiment will be described.

First, in the first case, it is upward operation and the first heel (101) is the first counterweight (OX)! Let's discuss the case where the weight is also heavy. Control device (do Iyr: 1..
When a startup command is issued from the
K< i+1. Each -7 first inverter (converted to three-phase AC at 611 - J z). Using this three-phase alternating current, the first induction motor (ljl) generates force,
The first heel (101) is driven by driving the first hoisting machine (81).
to rise. In other words, power running is performed.

When the first passenger (Qot) arrives at the destination floor, the inverter (61) of Ra1 is turned off and the first passenger 'ii'
i, jl'il no 11
01) is stopped.

Next, as the second case, in descending operation * ;IT J
A case will be described in which the heel θ01) is 111r greater than the first balance weight p (Ill). When the starting finger is issued from the control device, the first induction motor generates the same rotational force as described in the first case and runs the motor.
Perform a kōten. The first heel (101) has reached its destination -:'
? 't~J, the first inverter becomes non-conductive and the first
The induction/n motion motive συ is deenergized, and the first heel (1o
t) is stopped.

Next, in the third case, when driving up, the first heel (
A case will be described in which the first number (lot) is lighter than the first number (111). When a start command is issued from the control device, the first induction electric motor [71] is energized by a three-phase cross-flow, and the first heel (101) and the first two-piece joint are activated. ) of the first winding type by the amount of unbalance M
) generates a rotational force and is driven by this rotational force.

Therefore, after the first induction motor (71) reaches the synchronous speed, it acts as a generator and generates a braking torque commensurate with the torque from the first hoisting motor. In other words, a second regenerative operation is performed. First induction motor4. The electric power generated by At1ill is converted into direct current by the first inverter 1) and stored in the storage battery (5). Upon arrival at the destination floor, the first inverter (61) is turned off and the first spinning motor -t! +/11 is deactivated to stop the first heel (100).

Next, as the fourth case, in descending operation, the first heel (
Let us now consider the case where 9 (101) is also heavier than the first weight 9 (111). When a start command is issued from the control device, it is the same as described in the case of t113 above.

When regenerative operation is performed, the electric power generated by the first induction motor (711) is converted to DC by the first inverter Ill!
and stored in the storage battery (5). First heel (+o+
) When you arrive at the company's destination floor, you will be greeted by the first electric motor ff11.
is deenergized and stops.

The second heel 002) also has the second impact (liLFf4).
2 induction motor 13'! 6'lJ, the second winding up (82)
Due to the heavy unbalance with the second counterweight (112), the first heel (+01) as well as the second case and the third Case and F
Operation in case 41 of case P, 4 is performed.

It is assumed that the electric power generated by the regenerative operation is stored in the storage battery (5), but this is not necessarily the case; when the first heel (101) is in regenerative operation, the second heel (m ) is in power-row operation, part or all of the first regenerated power is used for power-row operation, and there are station buildings where only a portion or not at all can be stored in the storage battery (5).

In addition, the output voltage of the fuel cell (21) becomes high when there is no load, and the output voltage of the fuel cell (21) becomes high when there is no load.
Although there is a fear that an overvoltage may be applied to the surface, since the battery (5) is connected, it is averaged out and the overvoltage can be prevented from occurring.

Furthermore, since the elevators are out of service at night, the fuel cells are also out of service. When starting up the next morning, the starter heater must be used to heat it up. Therefore, it takes some time for the fuel cell to start up.

However, according to the above embodiment, since the storage battery (5) is used, if power is not supplied from the fuel cell,
Powered by storage batteries, the elevator can be operated immediately.

Yet again. Compared to electricity, city gas is inherently less prone to failures such as supply failures, but even if the city gas supply were to be cut off, electricity would be supplied from the storage battery and the system would be able to operate for several hours. Normally, city gas supply is restored before the storage battery discharges and becomes unusable. Therefore, even if the city gas supply is interrupted, the elevator will not stop due to this interruption, and you will not be trapped in the car.

Interaction within the pill; ifl may be different from n'r, ordinal state.

In addition, beak color 6 is required at 15:00, etc.
', t fi.

On the other hand, electricity is not supplied from the storage box or pond, 7).

The capacity of the fuel type fijj is smaller by 1:1.

FIG. 3 shows another length embodiment of this invention7. (In this case, turn off the power from the fuel cell (2) to 0N-OFF-j, !+L
'Gi! /-ri, here chi, tsuba- is used,! 71, According to this example, 11 to the elevator
j, When the power is between I and I, I change the 1 tuber (4a) to the 5 mountains of Isho.
．． , +1. tsaJ], chance-left i:1, can be prevented J[-.

As mentioned above, this invention was invented by Earl Beek, 'ft (L
``Fuel type file with fast response to ', and fI=
)'! ;Smash 1. A secondary battery that complements the σ step is connected in parallel to form a DC:[1° source, and the DC of this DC power source is converted to inverted AC to energize the induction motor. As a result, even if the peak load is generated due to the acceleration of the elevator, power is supplied without any delay from the fuel cell's quick response (C).For this reason, the power supply capacity is determined by the temperature rise. Even if nine devices are selected in the same way, there will be no shortage of capacity h1:.

[Brief explanation of drawings]

Figures 1 and 2 show an example of this invention. Figure 1 shows the power supply system for the elevator.
Negative "F21>, j is a block diagram showing the configuration of the fuel 11 In the figure, (1) is also gas, (2) is 3.+・1
Tff, pond, (5) is moss 127. Pond (secondary battery) (G
11fG2] is an inverter, (8s (82) is a simple electric motor. The same reference numerals in the two figures indicate the same or equivalent parts. Agent Masu Oiwa J, lIi Fig. 1 Fig. 2

Claims (1)

[Claims] A DC power source consists of a fuel cell that generates DC voltage using fuel, and a rechargeable secondary battery that is connected in parallel to the fuel cell.The DC voltage of this DC power source is converted to AC voltage to generate an elevator. Elevator power supply equipment equipped with an inverter that drives an induction motor.